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Honarmand K, Sirimaturos M, Hirshberg EL, Bircher NG, Agus MSD, Carpenter DL, Downs CR, Farrington EA, Freire AX, Grow A, Irving SY, Krinsley JS, Lanspa MJ, Long MT, Nagpal D, Preiser JC, Srinivasan V, Umpierrez GE, Jacobi J. Society of Critical Care Medicine Guidelines on Glycemic Control for Critically Ill Children and Adults 2024: Executive Summary. Crit Care Med 2024; 52:649-655. [PMID: 38240482 DOI: 10.1097/ccm.0000000000006173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2024]
Affiliation(s)
- Kimia Honarmand
- Division of Critical Care, Department of Medicine, Mackenzie Health, Vaughan, ON, Canada
- GUIDE Canada, McMaster University, Hamilton, ON, Canada
| | - Michael Sirimaturos
- System Critical Care Pharmacy Services Leader, Houston Methodist Hospital, Houston, TX
| | - Eliotte L Hirshberg
- Adult and Pediatric Critical Care Specialist, University of Utah School of Medicine, Salt Lake City, UT
| | - Nicholas G Bircher
- Department of Nurse Anesthesia, School of Nursing, University of Pittsburgh, Pittsburgh, PA
| | - Michael S D Agus
- Harvard Medical School and Division Chief, Medical Critical Care, Boston Children's Hospital, Boston, MA
| | | | | | | | - Amado X Freire
- Pulmonary Critical Care and Sleep Medicine at the University of Tennessee Health Science Center, Memphis, TN
| | | | - Sharon Y Irving
- Department of Nursing and Clinical Care Services-Critical Care, University of Pennsylvania School of Nursing, Children's Hospital of Philadelphia, Philadelphia, PA
| | - James S Krinsley
- Director of Critical Care, Emeritus, Vagelos Columbia University College of Physicians and Surgeons, Stamford Hospital, Stamford, CT
| | - Michael J Lanspa
- Division of Critical Care, Intermountain Medical Center, Salt Lake City, UT
| | - Micah T Long
- Department of Anesthesiology, Division of Critical Care, University of Wisconsin School of Medicine & Public Health, Madison, WI
| | - David Nagpal
- Division of Cardiac Surgery, Critical Care Western, London Health Sciences Centre, London, ON, Canada
| | - Jean-Charles Preiser
- Medical Director for Research and Teaching, Erasme Hospital, Hôpital Universitaire de Bruxelles, Brussels, Belgium
| | - Vijay Srinivasan
- Departments of Anesthesiology, Critical Care and Pediatrics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA
- Department of Anesthesiology and Critical Care Medicine, Children's Hospital of Philadelphia, Philadelphia, PA
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Honarmand K, Sirimaturos M, Hirshberg EL, Bircher NG, Agus MSD, Carpenter DL, Downs CR, Farrington EA, Freire AX, Grow A, Irving SY, Krinsley JS, Lanspa MJ, Long MT, Nagpal D, Preiser JC, Srinivasan V, Umpierrez GE, Jacobi J. Society of Critical Care Medicine Guidelines on Glycemic Control for Critically Ill Children and Adults 2024. Crit Care Med 2024; 52:e161-e181. [PMID: 38240484 DOI: 10.1097/ccm.0000000000006174] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2024]
Abstract
RATIONALE Maintaining glycemic control of critically ill patients may impact outcomes such as survival, infection, and neuromuscular recovery, but there is equipoise on the target blood levels, monitoring frequency, and methods. OBJECTIVES The purpose was to update the 2012 Society of Critical Care Medicine and American College of Critical Care Medicine (ACCM) guidelines with a new systematic review of the literature and provide actionable guidance for clinicians. PANEL DESIGN The total multiprofessional task force of 22, consisting of clinicians and patient/family advocates, and a methodologist applied the processes described in the ACCM guidelines standard operating procedure manual to develop evidence-based recommendations in alignment with the Grading of Recommendations Assessment, Development, and Evaluation Approach (GRADE) methodology. Conflict of interest policies were strictly followed in all phases of the guidelines, including panel selection and voting. METHODS We conducted a systematic review for each Population, Intervention, Comparator, and Outcomes question related to glycemic management in critically ill children (≥ 42 wk old adjusted gestational age to 18 yr old) and adults, including triggers for initiation of insulin therapy, route of administration, monitoring frequency, role of an explicit decision support tool for protocol maintenance, and methodology for glucose testing. We identified the best available evidence, statistically summarized the evidence, and then assessed the quality of evidence using the GRADE approach. We used the evidence-to-decision framework to formulate recommendations as strong or weak or as a good practice statement. In addition, "In our practice" statements were included when the available evidence was insufficient to support a recommendation, but the panel felt that describing their practice patterns may be appropriate. Additional topics were identified for future research. RESULTS This guideline is an update of the guidelines for the use of an insulin infusion for the management of hyperglycemia in critically ill patients. It is intended for adult and pediatric practitioners to reassess current practices and direct research into areas with inadequate literature. The panel issued seven statements related to glycemic control in unselected adults (two good practice statements, four conditional recommendations, one research statement) and seven statements for pediatric patients (two good practice statements, one strong recommendation, one conditional recommendation, two "In our practice" statements, and one research statement), with additional detail on specific subset populations where available. CONCLUSIONS The guidelines panel achieved consensus for adults and children regarding a preference for an insulin infusion for the acute management of hyperglycemia with titration guided by an explicit clinical decision support tool and frequent (≤ 1 hr) monitoring intervals during glycemic instability to minimize hypoglycemia and against targeting intensive glucose levels. These recommendations are intended for consideration within the framework of the patient's existing clinical status. Further research is required to evaluate the role of individualized glycemic targets, continuous glucose monitoring systems, explicit decision support tools, and standardized glycemic control metrics.
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Affiliation(s)
- Kimia Honarmand
- Division of Critical Care, Department of Medicine, Mackenzie Health, Vaughan, ON, Canada
- GUIDE Canada, McMaster University, Hamilton, ON, Canada
| | - Michael Sirimaturos
- System Critical Care Pharmacy Services Leader, Houston Methodist Hospital, Houston, TX
| | - Eliotte L Hirshberg
- Adult and Pediatric Critical Care Specialist, University of Utah School of Medicine, Salt Lake City, UT
| | - Nicholas G Bircher
- Department of Nurse Anesthesia, School of Nursing, University of Pittsburgh, Pittsburgh, PA
| | - Michael S D Agus
- Harvard Medical School and Division Chief, Medical Critical Care, Boston Children's Hospital, Boston, MA
| | | | | | | | - Amado X Freire
- Pulmonary Critical Care and Sleep Medicine at the University of Tennessee Health Science Center, Memphis, TN
| | | | - Sharon Y Irving
- Department of Nursing and Clinical Care Services-Critical Care, University of Pennsylvania School of Nursing, Children's Hospital of Philadelphia, Philadelphia, PA
| | - James S Krinsley
- Director of Critical Care, Emeritus, Vagelos Columbia University College of Physicians and Surgeons, Stamford Hospital, Stamford, CT
| | - Michael J Lanspa
- Division of Critical Care, Intermountain Medical Center, Salt Lake City, UT
| | - Micah T Long
- Department of Anesthesiology, Division of Critical Care, University of Wisconsin School of Medicine & Public Health, Madison, WI
| | - David Nagpal
- Division of Cardiac Surgery, Critical Care Western, London Health Sciences Centre, London, ON, Canada
| | - Jean-Charles Preiser
- Medical Director for Research and Teaching, Erasme Hospital, Hôpital Universitaire de Bruxelles, Brussels, Belgium
| | - Vijay Srinivasan
- Departments of Anesthesiology, Critical Care and Pediatrics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA
- Department of Anesthesiology and Critical Care Medicine, Children's Hospital of Philadelphia, Philadelphia, PA
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Long MT, Kruser JM, Quinonez SC. Urea cycle disorders in critically Ill adults. Curr Opin Clin Nutr Metab Care 2024; 27:184-191. [PMID: 37938118 DOI: 10.1097/mco.0000000000000992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2023]
Abstract
PURPOSE OF REVIEW Urea cycle disorders (UCDs) cause elevations in ammonia which, when severe, cause irreversible neurologic injury. Most patients with UCDs are diagnosed as neonates, though mild UCDs can present later - even into adulthood - during windows of high physiologic stress, like critical illness. It is crucial for clinicians to understand when to screen for UCDs and appreciate how to manage these disorders in order to prevent devastating neurologic injury or death. RECENT FINDINGS Hyperammonemia, particularly if severe, causes time- and concentration-dependent neurologic injury. Mild UCDs presenting in adulthood are increasingly recognized, so broader screening in adults is recommended. For patients with UCDs, a comprehensive, multitiered approach to management is needed to prevent progression and irreversible injury. Earlier exogenous clearance is increasingly recognized as an important complement to other therapies. SUMMARY UCDs alter the core pathway for ammonia metabolism. Screening for mild UCDs in adults with unexplained neurologic symptoms can direct care and prevent deterioration. Management of UCDs emphasizes decreasing ongoing ammonia production, avoiding catabolism, and supporting endogenous and exogenous ammonia clearance. Core neuroprotective and supportive critical care supplements this focused therapy.
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Affiliation(s)
- Micah T Long
- Departments of Anesthesiology & Internal Medicine, University of Wisconsin Hospitals and Clinics
| | - Jacqueline M Kruser
- Department of Medicine, University of Wisconsin Hospitals and Clinics, Madison, Wisconsin
| | - Shane C Quinonez
- Departments of Pediatrics and Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
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Merdji H, Long MT, Ostermann M, Herridge M, Myatra SN, De Rosa S, Metaxa V, Kotfis K, Robba C, De Jong A, Helms J, Gebhard CE. Sex and gender differences in intensive care medicine. Intensive Care Med 2023; 49:1155-1167. [PMID: 37676504 PMCID: PMC10556182 DOI: 10.1007/s00134-023-07194-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Accepted: 08/05/2023] [Indexed: 09/08/2023]
Abstract
Despite significant advancements in critical care medicine, limited attention has been given to sex and gender disparities in management and outcomes of patients admitted to the intensive care unit (ICU). While "sex" pertains to biological and physiological characteristics, such as reproductive organs, chromosomes and sex hormones, "gender" refers more to sociocultural roles and human behavior. Unfortunately, data on gender-related topics in the ICU are lacking. Consequently, data on sex and gender-related differences in admission to the ICU, clinical course, length of stay, mortality, and post-ICU burdens, are often inconsistent. Moreover, when examining specific diagnoses in the ICU, variations can be observed in epidemiology, pathophysiology, presentation, severity, and treatment response due to the distinct impact of sex hormones on the immune and cardiovascular systems. In this narrative review, we highlight the influence of sex and gender on the clinical course, management, and outcomes of the most encountered intensive care conditions, in addition to the potential co-existence of unconscious biases which may also impact critical illness. Diagnoses with a known sex predilection will be discussed within the context of underlying sex differences in physiology, anatomy, and pharmacology with the goal of identifying areas where clinical improvement is needed. To optimize patient care and outcomes, it is crucial to comprehend and address sex and gender differences in the ICU setting and personalize management accordingly to ensure equitable, patient-centered care. Future research should focus on elucidating the underlying mechanisms driving sex and gender disparities, as well as exploring targeted interventions to mitigate these disparities and improve outcomes for all critically ill patients.
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Affiliation(s)
- Hamid Merdji
- Intensive Care Unit, Department of Acute Medicine, University Hospital Basel, University of Basel, Petersgraben 4, 4031, Basel, Switzerland
| | - Micah T Long
- Departments of Anaesthesiology and Medicine, Division of Critical Care, University of Wisconsin Hospitals & Clinics, Madison, USA
| | - Marlies Ostermann
- Department of Critical Care, King's College London, Guy's & St Thomas' Hospital, London, UK
| | - Margaret Herridge
- Institute of Medical Science, University of Toronto, Toronto, ON, Canada
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, ON, Canada
- Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, ON, Canada
- Toronto General Hospital Research Institute, University Health Network, University of Toronto, Toronto, ON, Canada
| | - Sheila N Myatra
- Department of Anaesthesiology, Critical Care and Pain, Tata Memorial Hospital, Homi Bhabha National Institute, Mumbai, India
| | - Silvia De Rosa
- Centre for Medical Sciences - CISMed, University of Trento, Trento, Italy
- Department of Anesthesia and Intensive Care, Santa Chiara Regional Hospital, Trento, Italy
| | - Victoria Metaxa
- Department of Critical Care, King's College Hospital NHS Foundation Trust, London, UK
| | - Katarzyna Kotfis
- Department of Anaesthesiology, Intensive Therapy and Acute Intoxications, Pomeranian Medical University, Szczecin, Poland
| | - Chiara Robba
- Dipartimento di Scienze Chirurgiche Integrate e Diagnostiche, Università di Genova, Genova, Italy
- Anestesia e Rianimazione, IRCCS Policlinico San Martino, Genova, Italy
| | - Audrey De Jong
- Department of Anaesthesia and Intensive Care Unit, Regional University Hospital of Montpellier, St-Eloi Hospital, University of Montpellier, PhyMedExp, INSERM U1046, CNRS UMR, 9214, Montpellier, CEDEX 5, France
| | - Julie Helms
- Faculté de Médecine, Service de Médecine Intensive-Réanimation, Université de Strasbourg (UNISTRA)Hôpitaux Universitaires de StrasbourgNouvel Hôpital Civil, Strasbourg, France
- INSERM (French National Institute of Health and Medical Research), UMR 1260, Regenerative Nanomedicine (RNM), FMTS, Strasbourg, France
| | - Caroline E Gebhard
- Intensive Care Unit, Department of Acute Medicine, University Hospital Basel, University of Basel, Petersgraben 4, 4031, Basel, Switzerland.
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Hess AS, Long MT. Bicarbonate: From Physiology to Clinical Practice: Comment. Anesthesiology 2023; 139:549. [PMID: 37581529 DOI: 10.1097/aln.0000000000004695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/16/2023]
Affiliation(s)
- Aaron S Hess
- University of Wisconsin, Madison, Wisconsin (A.S.H.).
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6
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Al-Subu AM, Long MT, Nelson KL, Amond KL, Lasarev MR, Ferrazzano PA, Lushaj EB, Anagnostopoulos PV. Risk of Hypovitaminosis and Vitamin C Deficiency in Pediatric Patients Undergoing Cardiopulmonary Bypass. Pediatr Cardiol 2023; 44:1487-1494. [PMID: 37498330 DOI: 10.1007/s00246-023-03243-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Accepted: 07/14/2023] [Indexed: 07/28/2023]
Abstract
Vitamin C levels are known rapidly decrease in adult critical illness. Vitamin C scavenges free radicals, provides critical protection of the endothelial barrier, and improves endothelial responsiveness to catecholamines. Children with congenital heart disease and undergoing cardiac surgery might be at increased risk for low circulating vitamin C levels. A prospective single-center observational study investigated perioperative changes in vitamin C levels in critically ill Children who underwent congenital heart surgery using CPB. Vitamin C serum levels were collected preoperatively and postoperatively (upon admission to the ICU, 24 and 72 h). Linear mixed-effect model was used to estimate mean circulating concentration of vitamin C and to estimate changes in concentration over time. Primary outcome was change in circulating levels of vitamin C before and after CPB. Secondary outcomes were hospital length of stay (LOS), acute kidney injury (AKI), and illness severity. Forty-one patients with a median age of 4.5 [interquartile range (IQR) 2.6-65.6] months at the time of surgery were consented and enrolled. Median CPB duration was 130 [90-175] minutes, and hospital LOS was 9.1 [5.2-19] days. Mean vitamin C levels (μmol/L) before CPB, at PICU admission, 24 h, and 72 h were 82.0 (95% CI 73.4-90.7), 53.4 (95% CI 44.6,62.0), 55.1 (95% CI 46.3,63.8), and 59.2 (95% CI 50.3,68.1), respectively. Upon postoperative admission to the PICU, vitamin C levels decreased by 28.7 (95% CI 20.6-36.8; p < 0.001) μmol/L, whereas levels at 24 and 72 h recovered and did not differ substantially from concentrations reported upon PICU admission (p > 0.15). Changes in vitamin C concentration were not associated with CPB time, STAT mortality category, age, or PIM3. Three patients had post-CPB hypovitaminosis C or vitamin C deficiency. Reduction in vitamin C levels was not associated with hospital LOS (p = 0.673). A 25 μmol/L decrease in vitamin C levels upon PICU admission was associated with developing AKI (aOR = 3.65; 95% CI 1.01-18.0, p = 0.049). Pediatric patients undergoing cardiac surgery with CPB showed decreased vitamin C levels during the immediate postoperative period. Effects of hypovitaminosis C and vitamin C deficiency in this population remain unclear.
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Affiliation(s)
- Awni M Al-Subu
- Division of Pediatric Critical Care Medicine, Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, 600 Highland Ave Rm H6/535, Madison, WI, 53792, USA.
| | - Micah T Long
- Division of Critical Care, Department of Anesthesiology, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Kari L Nelson
- Department of Surgery, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Kate L Amond
- Department of Surgery, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Michael R Lasarev
- Department of Biostatistics and Medical Informatics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Peter A Ferrazzano
- Division of Pediatric Critical Care Medicine, Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, 600 Highland Ave Rm H6/535, Madison, WI, 53792, USA
| | - Entela B Lushaj
- Department of Surgery, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Petros V Anagnostopoulos
- Department of Surgery, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
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de Forcrand C, Cassara CM, Dollerschell JT, Kopanczyk R, Long MT. Refractory Hypoxemia on VV-ECMO: Repetition of a Structured Approach Is Paramount: A Case Report. A A Pract 2023; 17:e01677. [PMID: 37146223 DOI: 10.1213/xaa.0000000000001677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Veno-venous extracorporeal membrane oxygenation (VV-ECMO) is increasingly used to manage severe respiratory failure. Unfortunately, refractory hypoxemia often complicates VV-ECMO support. Both circuit- and patient-related etiologies can drive this, and a structured approach is necessary to diagnose and treat the condition. We present the case of a patient on VV-ECMO for acute respiratory distress syndrome who suffered from several distinct etiologies of refractory hypoxemia over a short timeframe. Frequent recalculation of cardiac output and oxygen delivery enabled early diagnosis and treatment of these conditions. We highlight the need for a structured and oft-repeated approach to this complex problem.
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Affiliation(s)
- Claire de Forcrand
- From the Department of Anesthesiology, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Chris M Cassara
- Department of Anesthesiology, University of Wisconsin Hospitals and Clinics, Madison, Wisconsin
| | - John T Dollerschell
- Department of Anesthesiology, University of Wisconsin Hospitals and Clinics, Madison, Wisconsin
| | - Rafal Kopanczyk
- Department of Anesthesiology, Division of Critical Care Medicine, The Ohio State University Wexner Medical Center, Columbus, Ohio
| | - Micah T Long
- Department of Anesthesiology, University of Wisconsin Hospitals and Clinics, Madison, Wisconsin
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Gibbs KW, Ginde AA, Prekker ME, Seitz KP, Stempek SB, Taylor C, Gandotra S, White H, Resnick-Ault D, Khan A, Mohmed A, Brainard JC, Fein DG, Aggarwal NR, Whitson MR, Halliday SJ, Gaillard JP, Blinder V, Driver BE, Palakshappa JA, Lloyd BD, Wozniak JM, Exline MC, Russell DW, Ghamande S, Withers C, Hubel KA, Moskowitz A, Bastman J, Andrea L, Sottile PD, Page DB, Long MT, Goranson JK, Malhotra R, Long BJ, Schauer SG, Connor A, Anderson E, Maestas K, Rhoads JP, Womack K, Imhoff B, Janz DR, Trent SA, Self WH, Rice TW, Semler MW, Casey JD. Protocol and statistical analysis plan for the PREOXI trial of preoxygenation with noninvasive ventilation vs oxygen mask. medRxiv 2023:2023.03.23.23287539. [PMID: 36993496 PMCID: PMC10055579 DOI: 10.1101/2023.03.23.23287539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 04/23/2023]
Abstract
Background Hypoxemia is a common and life-threatening complication during emergency tracheal intubation of critically ill adults. The administration of supplemental oxygen prior to the procedure ("preoxygenation") decreases the risk of hypoxemia during intubation. Research Question Whether preoxygenation with noninvasive ventilation prevents hypoxemia during tracheal intubation of critically ill adults, compared to preoxygenation with oxygen mask, remains uncertain. Study Design and Methods The PRagmatic trial Examining OXygenation prior to Intubation (PREOXI) is a prospective, multicenter, non-blinded randomized comparative effectiveness trial being conducted in 7 emergency departments and 17 intensive care units across the United States. The trial compares preoxygenation with noninvasive ventilation versus oxygen mask among 1300 critically ill adults undergoing emergency tracheal intubation. Eligible patients are randomized in a 1:1 ratio to receive either noninvasive ventilation or an oxygen mask prior to induction. The primary outcome is the incidence of hypoxemia, defined as a peripheral oxygen saturation <85% between induction and 2 minutes after intubation. The secondary outcome is the lowest oxygen saturation between induction and 2 minutes after intubation. Enrollment began on 10 March 2022 and is expected to conclude in 2023. Interpretation The PREOXI trial will provide important data on the effectiveness of noninvasive ventilation and oxygen mask preoxygenation for the prevention of hypoxemia during emergency tracheal intubation. Specifying the protocol and statistical analysis plan prior to the conclusion of enrollment increases the rigor, reproducibility, and interpretability of the trial. Clinical trial registration number NCT05267652.
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Affiliation(s)
- Kevin W. Gibbs
- Section on Pulmonary, Critical Care, Allergy, and immunology, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Adit A. Ginde
- Department of Emergency Medicine, University of Colorado School of Medicine Aurora, CO, USA
| | - Matthew E. Prekker
- Division of Pulmonary and Critical Care Medicine, Hennepin County Medical Center, Minneapolis, MN, USA
- Department of Emergency Medicine, Hennepin County Medical Center, Minneapolis, MN, USA
| | - Kevin P. Seitz
- Department of Medicine, Division of Pulmonary, Allergy, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Susan B. Stempek
- Department of Medicine, Division of Pulmonary & Critical Care Medicine, Lahey Hospital & Medical Center, Burlington, MA, USA
| | - Caleb Taylor
- Pulmonary, Critical Care and Sleep Medicine, The Ohio State University, Columbus, OH, USA
| | - Sheetal Gandotra
- Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine University of Alabama at Birmingham, Birmingham, AL, USA
| | - Heath White
- Department of Medicine, Division of pulmonary & Critical Care Medicine, Baylor Scott & White Medical Center, Temple, TX, USA
| | - Daniel Resnick-Ault
- Department of Emergency Medicine, University of Colorado School of Medicine Aurora, CO, USA
| | - Akram Khan
- Department of Medicine, Division of Pulmonary, Allergy, and Critical Care Medicine, Oregon Health & Science University, Portland, OR, USA
| | - Amira Mohmed
- Division of Critical Care Medicine Montefiore Medical Center Bronx, NY, USA
| | - Jason C. Brainard
- Department of Anesthesiology University of Colorado School of Medicine Aurora, CO, USA
| | - Daniel G. Fein
- Division of Pulmonary Medicine Montefiore Medical Center Bronx, NY, USA
| | - Neil R. Aggarwal
- Department of Medicine, Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado School of Medicine, Aurora, CO, USA
| | - Micah R. Whitson
- Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine University of Alabama at Birmingham, Birmingham, AL, USA
- Department of Emergency Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Stephen J. Halliday
- Department of Medicine, Division of Allergy, Pulmonary, and Critical Care Medicine, University of Wisconsin School of Medicine and Public Health, Madison, Wi, USA
| | - John P. Gaillard
- Department of Anesthesiology, Section on Critical Care ,Wake Forest School of Medicine, Winston-Salem, NC, USA
- Department of Emergency Medicine, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Veronika Blinder
- Division of Critical Care Medicine Montefiore Medical Center Bronx, NY, USA
| | - Brian E. Driver
- Department of Emergency Medicine, Hennepin County Medical Center, Minneapolis, MN, USA
| | - Jessica A. Palakshappa
- Section on Pulmonary, Critical Care, Allergy, and immunology, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Bradley D. Lloyd
- Vanderbilt Institute for Clinical and Translational Research, and Department of Emergency Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Joanne M. Wozniak
- Department of Medicine, Division of Pulmonary & Critical Care Medicine, Lahey Hospital & Medical Center, Burlington, MA, USA
| | - Matthew C. Exline
- Pulmonary, Critical Care and Sleep Medicine, The Ohio State University, Columbus, OH, USA
| | - Derek W. Russell
- Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine University of Alabama at Birmingham, Birmingham, AL, USA
- Pulmonary Section, Birmingham VA medical Center, Birmingham, AL, USA
| | - Shekhar Ghamande
- Department of Medicine, Division of pulmonary & Critical Care Medicine, Baylor Scott & White Medical Center, Temple, TX, USA
| | - Cori Withers
- Department of Emergency Medicine, University of Colorado School of Medicine Aurora, CO, USA
| | - Kinsley A. Hubel
- Department of Medicine, Division of Pulmonary, Allergy, and Critical Care Medicine, Oregon Health & Science University, Portland, OR, USA
| | - Ari Moskowitz
- Division of Critical Care Medicine Montefiore Medical Center Bronx, NY, USA
| | - Jill Bastman
- Department of Emergency Medicine, University of Colorado School of Medicine Aurora, CO, USA
| | - Luke Andrea
- Division of Critical Care Medicine Montefiore Medical Center Bronx, NY, USA
| | - Peter D. Sottile
- Department of Medicine, Division of Pulmonary Sciences and Critical Care Medicine, University of Colorado School of Medicine, Aurora, CO, USA
| | - David B. Page
- Department of Medicine, Division of Pulmonary, Allergy and Critical Care Medicine University of Alabama at Birmingham, Birmingham, AL, USA
| | - Micah T. Long
- Department of Anesthesiology, University of Wisconsin School of Medicine & Public Health, Madison, WI, USA
| | - Jordan Kugler Goranson
- Department of Emergency Medicine, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Rishi Malhotra
- Division of Critical Care Medicine Montefiore Medical Center Bronx, NY, USA
| | - Brit J. Long
- 59 Medical Wing, United States Air Force, Fort Sam Houston, San Antonio, TX, USA
| | - Steven G. Schauer
- United States Army Institute of Surgical Research, Joint Base San Antonio-Fort Sam Houston, San Antoni, TX, USA
| | - Andrew Connor
- Department of Medicine, Division of Pulmonary, Allergy, and Critical Care Medicine, Oregon Health & Science University, Portland, OR, USA
| | - Erin Anderson
- Department of Emergency Medicine, University of Colorado School of Medicine Aurora, CO, USA
| | - Kristin Maestas
- Department of Emergency Medicine, University of Colorado School of Medicine Aurora, CO, USA
| | - Jillian P. Rhoads
- Department of Medicine, Division of Pulmonary, Allergy, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Kelsey Womack
- Department of Medicine, Division of Pulmonary, Allergy, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Brant Imhoff
- Department of Biostatistics, Vanderbilt University Medical Center, Nashville, TN, USA
| | - David R. Janz
- University Medical Center New Orleans and the Department of Medicine, Section of Pulmonary/Critical Care Medicine and Allergy/Immunology, Louisiana State University School of Medicine, New Orleans, LA, USA
| | - Stacy A. Trent
- Department of Emergency Medicine, University of Colorado School of Medicine Aurora, CO, USA
- Department of Emergency Medicine, Denver Health Medical Center, Denver, CO, USA
| | - Wesley H. Self
- Vanderbilt Institute for Clinical and Translational Research, and Department of Emergency Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Todd W. Rice
- Department of Medicine, Division of Pulmonary, Allergy, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Matthew W. Semler
- Department of Medicine, Division of Pulmonary, Allergy, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Jonathan D. Casey
- Department of Medicine, Division of Pulmonary, Allergy, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
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9
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Long MT, Sanders RD, Preiser JC. Critical Care and the Postintensive Care Syndrome. JAMA Netw Open 2023; 6:e230391. [PMID: 36853614 DOI: 10.1001/jamanetworkopen.2023.0391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/01/2023] Open
Affiliation(s)
- Micah T Long
- Department of Anesthesiology, University of Wisconsin Hospitals and Clinics, Madison
| | - Robert D Sanders
- Department of Anaesthetics, The University of Sydney, Sydney, New South Wales, Australia
- Royal Prince Alfred Hospital, Camperdown, New South Wales, Australia
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10
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Kopanczyk R, Lester J, Long MT, Kossbiel BJ, Hess AS, Rozycki A, Nunley DR, Habib A, Taylor A, Awad H, Bhatt AM. The Future of Cardiothoracic Surgical Critical Care Medicine as a Medical Science: A Call to Action. Medicina (Kaunas) 2022; 59:47. [PMID: 36676669 PMCID: PMC9867461 DOI: 10.3390/medicina59010047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 12/19/2022] [Accepted: 12/21/2022] [Indexed: 12/28/2022]
Abstract
Cardiothoracic surgical critical care medicine (CT-CCM) is a medical discipline centered on the perioperative care of diverse groups of patients. With an aging demographic and an increase in burden of chronic diseases the utilization of cardiothoracic surgical critical care units is likely to escalate in the coming decades. Given these projections, it is important to assess the state of cardiothoracic surgical intensive care, to develop goals and objectives for the future, and to identify knowledge gaps in need of scientific inquiry. This two-part review concentrates on CT-CCM as its own subspeciality of critical care and cardiothoracic surgery and provides aspirational goals for its practitioners and scientists. In part one, a list of guiding principles and a call-to-action agenda geared towards growth and promotion of CT-CCM are offered. In part two, an evaluation of selected scientific data is performed, identifying gaps in CT-CCM knowledge, and recommending direction to future scientific endeavors.
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Affiliation(s)
- Rafal Kopanczyk
- Department of Anesthesiology, Division of Critical Care, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Jesse Lester
- Department of Anesthesiology, Division of Critical Care, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Micah T. Long
- Department of Anesthesiology, University of Wisconsin Hospitals & Clinics, Madison, WI 53792, USA
| | - Briana J. Kossbiel
- Department of Anesthesiology, Division of Critical Care, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Aaron S. Hess
- Department of Anesthesiology and Pathology & Laboratory Medicine, University of Wisconsin Hospitals & Clinics, Madison, WI 53792, USA
| | - Alan Rozycki
- Department of Pharmacology, The Ohio State Wexner Medical Center, Columbus, OH 43210, USA
| | - David R. Nunley
- Department of Pulmonary, Critical Care & Sleep Medicine, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Alim Habib
- College of Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Ashley Taylor
- Department of Anesthesiology, Division of Critical Care, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Hamdy Awad
- Department of Anesthesiology, Division of Cardiothoracic and Vascular Anesthesia, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
| | - Amar M. Bhatt
- Department of Anesthesiology, Division of Critical Care, The Ohio State University Wexner Medical Center, Columbus, OH 43210, USA
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11
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Cassara CM, Long MT, Dollerschell JT, Chae F, Hall DJ, Demiralp G, Stampfl MJ, Bernardoni B, McCarthy DP, Glazer JM. Extracorporeal Cardiopulmonary Resuscitation: A Narrative Review and Establishment of a Sustainable Program. Medicina (B Aires) 2022; 58:medicina58121815. [PMID: 36557017 PMCID: PMC9781756 DOI: 10.3390/medicina58121815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Revised: 11/15/2022] [Accepted: 12/06/2022] [Indexed: 12/14/2022] Open
Abstract
The rates of survival with functional recovery for out of hospital cardiac arrest remain unacceptably low. Extracorporeal cardiopulmonary resuscitation (ECPR) quickly resolves the low-flow state of conventional cardiopulmonary resuscitation (CCPR) providing valuable perfusion to end organs. Observational studies have shown an association with the use of ECPR and improved survivability. Two recent randomized controlled studies have demonstrated improved survival with functional neurologic recovery when compared to CCPR. Substantial resources and coordination amongst different specialties and departments are crucial for the successful implementation of ECPR. Standardized protocols, simulation based training, and constant communication are invaluable to the sustainability of a program. Currently there is no standardized protocol for the post-cannulation management of these ECPR patients and, ideally, upcoming studies should aim to evaluate these protocols.
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Affiliation(s)
- Chris M. Cassara
- Department of Anesthesiology, University of Wisconsin Hospitals & Clinics, 600 Highland Ave., Madison, WI 53792, USA
- Correspondence: ; Tel.: +1-608-263-8100
| | - Micah T. Long
- Department of Anesthesiology, University of Wisconsin Hospitals & Clinics, 600 Highland Ave., Madison, WI 53792, USA
| | - John T. Dollerschell
- Department of Anesthesiology, University of Wisconsin Hospitals & Clinics, 600 Highland Ave., Madison, WI 53792, USA
| | - Floria Chae
- Department of Anesthesiology, Ohio State University Wexner Medical Center, 370 W. 9th Ave., Columbus, OH 43210, USA
| | - David J. Hall
- Department of Surgery, University of Wisconsin Hospitals & Clinics, 600 Highland Ave., Madison, WI 53792, USA
| | - Gozde Demiralp
- Department of Anesthesiology, University of Wisconsin Hospitals & Clinics, 600 Highland Ave., Madison, WI 53792, USA
| | - Matthew J. Stampfl
- Department of Emergency Medicine, University of Wisconsin Hospitals & Clinics, 600 Highland Ave., Madison, WI 53792, USA
| | - Brittney Bernardoni
- Department of Emergency Medicine, University of Wisconsin Hospitals & Clinics, 600 Highland Ave., Madison, WI 53792, USA
| | - Daniel P. McCarthy
- Department of Surgery, University of Wisconsin Hospitals & Clinics, 600 Highland Ave., Madison, WI 53792, USA
| | - Joshua M. Glazer
- Department of Emergency Medicine, University of Wisconsin Hospitals & Clinics, 600 Highland Ave., Madison, WI 53792, USA
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12
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Feichtinger S, de Man A, Dalia AA, Groose MK, Long MT. Sepsis and Resuscitation: The Importance of Time. Crit Care Med 2022; 50:e615-e616. [PMID: 35612462 DOI: 10.1097/ccm.0000000000005494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- Stuart Feichtinger
- Department of Anesthesiology, University of Wisconsin School of Medicine & Public Health, Madison, WI
| | - Angélique de Man
- Department of Intensive Care, Amsterdam UMC University Medical Centers, Location VUmc, Amsterdam, The Netherlands
| | - Adam A Dalia
- Department of Anaesthesiology, Massachusetts General Hospital, Boston, MA
| | - Molly K Groose
- Department of Anesthesiology, University of Wisconsin School of Medicine & Public Health, Madison, WI
| | - Micah T Long
- Department of Anesthesiology, University of Wisconsin School of Medicine & Public Health, Madison, WI
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13
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Ammar MA, Ammar AA, Wieruszewski PM, Bissell BD, T Long M, Albert L, Khanna AK, Sacha GL. Timing of vasoactive agents and corticosteroid initiation in septic shock. Ann Intensive Care 2022; 12:47. [PMID: 35644899 PMCID: PMC9148864 DOI: 10.1186/s13613-022-01021-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 05/09/2022] [Indexed: 12/20/2022] Open
Abstract
Septic shock remains a health care concern associated with significant morbidity and mortality. The Surviving Sepsis Campaign Guidelines for Management of Sepsis and Septic Shock recommend early fluid resuscitation and antimicrobials. Beyond initial management, the guidelines do not provide clear recommendations on appropriate time to initiate vasoactive therapies and corticosteroids in patients who develop shock. This review summarizes the literature regarding time of initiation of these interventions. Clinical data regarding time of initiation of these therapies in relation to shock onset, sequence of treatments with regard to each other, and clinical markers evaluated to guide initiation are summarized. Early-high vasopressor initiation within first 6 h of shock onset is associated with lower mortality. Following norepinephrine initiation, the exact dose and timing of escalation to adjunctive vasopressor agents are not well elucidated in the literature. However, recent data indicate that timing may be an important factor in initiating vasopressors and adjunctive therapies, such as corticosteroids. Norepinephrine-equivalent dose and lactate concentration can aid in determining when to initiate vasopressin and angiotensin II in patients with septic shock. Future guidelines with clear recommendations on the time of initiation of septic shock therapies are warranted.
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Affiliation(s)
- Mahmoud A Ammar
- Department of Pharmacy, Yale New Haven Health System, 20 York Street, New Haven, CT, 06510, USA.
| | - Abdalla A Ammar
- Department of Pharmacy, Yale New Haven Health System, 20 York Street, New Haven, CT, 06510, USA
| | - Patrick M Wieruszewski
- Departments of Anesthesiology and Pharmacy, Mayo Clinic, 200 First Street SW, Rochester, MN, USA
| | - Brittany D Bissell
- Department of Pulmonary, Critical Care, and Sleep Medicine, College of Medicine, University of Kentucky, Lexington, KY, USA.,Department of Pharmacy Practice and Science, College of Pharmacy, University of Kentucky, Lexington, KY, USA
| | - Micah T Long
- Department of Anesthesiology, University of Wisconsin Hospitals and Clinics, 600 Highland Ave, Madison, WI, USA
| | - Lauren Albert
- Department of Pharmacy, Hospital of the University of Pennsylvania, 3400 Spruce Street, Philadelphia, PA, USA
| | - Ashish K Khanna
- Department of Anesthesiology, Section on Critical Care Medicine, Wake Forest School of Medicine, Wake Forest Center for Biomedical Informatics, Perioperative Outcomes and Informatics Collaborative, Medical Center Boulevard, Winston-Salem, NC, USA.,Outcomes Research Consortium, Cleveland, OH, USA
| | - Gretchen L Sacha
- Department of Pharmacy, Cleveland Clinic, 9500 Euclid Avenue, Hb-105, Cleveland, OH, USA
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14
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Long MT, Coursin DB. In reply: Undifferentiated non-hepatic hyperammonemia in the ICU: Diagnosis and management. J Crit Care 2022; 71:154075. [PMID: 35637120 DOI: 10.1016/j.jcrc.2022.154075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Accepted: 05/17/2022] [Indexed: 10/18/2022]
Affiliation(s)
- Micah T Long
- Department of Anesthesiology, University of Wisconsin Hospitals and Clinics, Madison, WI, United States of America.
| | - Douglas B Coursin
- Department of Anesthesiology, University of Minnesota Medical School, Minneapolis, MN, United States of America; Departments of Anesthesiology & Medicine, University of Wisconsin Hospitals and Clinics, Madison, WI, United States of America
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15
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Yastrebov K, Coursin DB, Mahajan A, Long MT. Broadening the frequencies of clinical sound: another lesson from COVID-19. Ultrasonography 2022; 41:430-431. [PMID: 34979734 PMCID: PMC8942743 DOI: 10.14366/usg.21228] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Accepted: 11/30/2021] [Indexed: 11/11/2022] Open
Affiliation(s)
- Konstantin Yastrebov
- Department of Intensive Care, Prince of Wales Hospital and The University of New South Wales, Sydney, NSW, Australia
| | - Douglas B Coursin
- Department of Anesthesiology and Medicine, The University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Aman Mahajan
- Department of Anesthesiology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Micah T Long
- Department of Anesthesiology, The University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
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16
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Johnson HR, Couillard AB, Busch RA, Long MT. From the Cava to the Chest: Partial Anomalous Pulmonary Venous Connection. Am J Respir Crit Care Med 2021; 205:e14-e15. [PMID: 34784494 DOI: 10.1164/rccm.202105-1147im] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- Hillary R Johnson
- University of Wisconsin-Madison, 5228, Department of Surgery, Madison, Wisconsin, United States
| | - Allison B Couillard
- University of Wisconsin-Madison, 5228, Department of Radiology, Madison, Wisconsin, United States
| | - Rebecca A Busch
- University of Wisconsin-Madison, 5228, Department of Surgery, Madison, Wisconsin, United States
| | - Micah T Long
- University of Wisconsin Madison, 5228, Department of Anesthesiology, Madison, Wisconsin, United States;
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17
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Long MT, Grate J, Bradley KV. Postoperative Hemidiaphragmatic Paralysis and Platypnea-Orthodeoxia Syndrome. Indian J Crit Care Med 2021; 25:951-953. [PMID: 34733043 PMCID: PMC8559750 DOI: 10.5005/jp-journals-10071-23934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Abstract
Long MT, Grate J, Bradley KV. Postoperative Hemidiaphragmatic Paralysis and Platypnea–Orthodeoxia Syndrome. Indian J Crit Care Med 2021;25(8):951–953.
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Affiliation(s)
- Micah T Long
- Department of Anesthesiology, Division of Critical Care Anesthesiology, University of Wisconsin Hospitals and Clinics, Madison, Wisconsin, United States
| | - Jeremy Grate
- Department of Anesthesiology, University of Wisconsin Hospitals and Clinics, Madison, Wisconsin, United States
| | - Kaitlyn V Bradley
- Department of Medicine, Division of Pulmonary and Critical Care Medicine, University of Wisconsin Hospitals and Clinics, Madison, Wisconsin, United States
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18
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Palmon P, Glazer JM, Long MT. Postprandial Hypotension in the Intensive Care Unit Due To Portal Hypertension and Coronavirus Disease 2019: A Case Report. A A Pract 2021; 15:e01485. [PMID: 34125079 DOI: 10.1213/xaa.0000000000001485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
A 49-year-old man with cirrhosis and portal hypertension was admitted for acute respiratory distress syndrome secondary to coronavirus disease 2019 (COVID-19) pneumonia. His course was complicated by postprandial hypotension (PPH)-episodic hemodynamic collapse that occurred minutes after enteral administration of medications or fluids. Octreotide, which reduces splanchnic pooling and can treat PPH, successfully prevented ongoing events. PPH is associated with mortality in the outpatient setting, and at-risk patients include the elderly and those with autonomic dysfunction, including those with COVID-19. Portal hypertension is a likely additional risk factor that has not been previously described. Octreotide is the mainstay of PPH prophylaxis.
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Affiliation(s)
| | | | - Micah T Long
- Anesthesiology, University of Wisconsin Hospitals and Clinics, Madison, Wisconsin
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Affiliation(s)
- Carl J Lavie
- Department of Cardiovascular Medicine, Ochsner Clinical School-The University of Queensland School of Medicine, New Orleans, LA.
| | - Douglas B Coursin
- Departments of Anesthesiology and Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI
| | - Micah T Long
- Department of Anesthesiology, University of Wisconsin School of Medicine and Public Health, Madison, WI
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20
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Long MT, Murray M. Letter to the Editor on "Percutaneous Dilational Tracheostomy without Bronchoscopy: Placement is Safe, Reintervention is Not.". Tanaffos 2020; 19:170-172. [PMID: 33815535 PMCID: PMC8008404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Micah T. Long
- Department of Anesthesiology, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Melissa Murray
- Department of Emergency Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
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21
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Affiliation(s)
- Micah T Long
- Department of Anesthesiology, University of Wisconsin School of Medicine and Public Health, Madison
| | - Pierre Kory
- Department of Medicine, University of Wisconsin School of Medicine and Public Health, Madison
| | - Paul Marik
- Department of Medicine, Eastern Virginia Medical School, Norfolk
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22
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Affiliation(s)
- Micah T Long
- Department of Anesthesiology, University of Wisconsin School of Medicine and Public Health, Madison, WI
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23
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Frommelt MA, Kory P, Long MT. Letter on Update to the Vitamin C, Thiamine, and Steroids in Sepsis (VICTAS) Protocol. Trials 2020; 21:350. [PMID: 32317008 PMCID: PMC7175527 DOI: 10.1186/s13063-020-04289-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Accepted: 03/28/2020] [Indexed: 01/20/2023] Open
Affiliation(s)
- Mark A Frommelt
- Department of Medicine, University of Wisconsin, 1685 Highland Avenue 5158 Medical Foundation Centennial Building, Madison, 53705-2281, WI, USA
| | - Pierre Kory
- Department of Medicine, University of Wisconsin, 1685 Highland Avenue 5158 Medical Foundation Centennial Building, Madison, 53705-2281, WI, USA
| | - Micah T Long
- Department of Anesthesiology, University of Wisconsin School of Medicine and Public Health, B6/319 UW CSC, 600 Highland Ave., Madison, WI, 53792-3272, USA.
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Long MT, Coursin DB, Krinsley JS. Treatment of Hyperglycemia in Patients With Acute Stroke. JAMA 2019; 322:2248. [PMID: 31821425 DOI: 10.1001/jama.2019.16339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- Micah T Long
- Department of Anesthesiology, University of Wisconsin School of Medicine and Public Health, Madison
| | - Douglas B Coursin
- Department of Anesthesiology, University of Wisconsin School of Medicine and Public Health, Madison
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Long MT, Hess AS, McCarthy DP, DeCamp MM. Power for the Sickest: Vitamin C for Vasoplegia after Cardiac Surgery. J Cardiothorac Vasc Anesth 2019; 34:1123. [PMID: 31623966 DOI: 10.1053/j.jvca.2019.09.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Accepted: 09/14/2019] [Indexed: 11/11/2022]
Affiliation(s)
- Micah T Long
- Department of Anesthesiology, Division of Critical Care, University of Wisconsin School of Medicine and Public Health, Madison, WI
| | - Aaron S Hess
- Department of Anesthesiology, Division of Transplant Anesthesiology, University of Wisconsin School of Medicine and Public Health, Madison, WI
| | - Daniel P McCarthy
- Department of Surgery, Division of Cardiothoracic Surgery, University of Wisconsin School of Medicine and Public Health, Madison, WI
| | - Malcolm M DeCamp
- Department of Surgery, Division of Cardiothoracic Surgery, University of Wisconsin School of Medicine and Public Health, Madison, WI
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Long MT, Gallo PD, Hammel LL, Coursin DB. A Misguided Contraindication. A A Pract 2019; 12:99-102. [DOI: 10.1213/xaa.0000000000000856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Lewis SL, Holl HM, Streeter C, Posbergh C, Schanbacher BJ, Place NJ, Mallicote MF, Long MT, Brooks SA. Genomewide association study reveals a risk locus for equine metabolic syndrome in the Arabian horse. J Anim Sci 2017; 95:1071-1079. [PMID: 28380523 DOI: 10.2527/jas.2016.1221] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Equine obesity can cause life-threatening secondary chronic conditions, similar to those in humans and other animal species. Equine metabolic syndrome (EMS), primarily characterized by hyperinsulinemia, is often present in obese horses and ponies. Due to clinical similarities to conditions such as pituitary pars intermedia dysfunction (formerly equine Cushing's disease), conclusive diagnosis of EMS often proves challenging. Aside from changes in diet and exercise, few targeted treatments are available for EMS, emphasizing the need for early identification of at-risk individuals to enable implementation of preventative measures. A genomewide association study (GWAS) using Arabian horses with a history of severe laminitis secondary to EMS revealed significant genetic markers near a single candidate gene () that may play a role in cholesterol homeostasis. The best marker, BIEC2-263524 (chr14:69276814 T > C), was correlated with elevated insulin values and increased frequency of laminitis ( = 0.0024 and = 9.663 × 10, respectively). In a second population of Arabian horses, the BIEC2-263524 marker maintained its associations with higher modified insulin-to-glucose ratio (MIRG) values ( = 0.0056) and BCS ( = 0.0063). Screening of the predicted coding regions by sequencing identified a polymorphic guanine homopolymer and 5 haplotypes in the 3' untranslated region (UTR). An 11 guanine (11-G) allele at was correlated with elevated insulin values in the GWAS population ( = 0.0008) and, in the second population, elevated MIRG and increased BCS > 6.5 ( = 0.0055 and = 0.0162, respectively). The BIEC2-263524-C and the 3' UTR -11(G) polymorphisms were correlated at a 98% frequency, indicating strong linkage disequilibrium across this 150-kb haplotype. Assays for these markers could diagnose horses with a genetic predisposition to develop obesity. Additionally, discovery of FAM174A function may improve our understanding of the etiology of this troubling illness in the horse and warrants investigation of this locus for a role in metabolic- and obesity-related disorders of other species.
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Affiliation(s)
| | - Ann M Sheehy
- Department of Medicine and Division of Hospital Medicine
| | - Douglas B Coursin
- Department of Anesthesiology and Department of Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI.
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29
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Delcambre GH, Liu J, Streit WJ, Shaw GPJ, Vallario K, Herrington J, Wenzlow N, Barr KL, Long MT. Phenotypic characterisation of cell populations in the brains of horses experimentally infected with West Nile virus. Equine Vet J 2017; 49:815-820. [PMID: 28470955 DOI: 10.1111/evj.12697] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Accepted: 04/21/2017] [Indexed: 11/28/2022]
Abstract
BACKGROUND West Nile virus (WNV), a mosquito borne member of the Flaviviridae, is one of the most commonly diagnosed agents of viral encephalitis in horses and people worldwide. OBJECTIVES A cassette of markers for formalin-fixed paraffin-embedded tissue and an archive of tissues from experimental infections in the horse were used to investigate the equine neuroimmune response to WNV meningoencephalomyelitis to phenotype the early response to WNV infection in the horse. STUDY DESIGN Quantitative analysis using archived tissue from experimentally infected horses. METHODS The thalamus and hindbrain from 2 groups of 6 horses were compared and consisted of a culture positive tissues from WNV experimentally horses, in the other, normal horses. Formalin-fixed paraffin-embedded tissue from the thalamus and hindbrain were immunolabeled for microglia, astrocytes, B cells, macrophages/neutrophils, CD3+ T cells. Fresh frozen tissues were immunolabeled for CD4+ and CD8+ T lymphocyte cell markers. Cell counts were obtained using a computer software program. Differences, after meeting assumptions of abnormality, were computed using a general linear model with a Tukey test (P<0.05) for pairwise comparisons. RESULTS In WNV-challenged horses, Iba-1+ microglia, CD3+ T lymphocyte and MAC387+ macrophage staining were significantly increased. The T cell response for the WNV-challenged horses was mixed, composed of CD4+ and CD8+ T lymphocytes. A limited astrocyte response was also observed in WNV-challenged horses, and MAC387+ and B cells were the least abundant cell populations. MAIN LIMITATIONS The results of this study were limited by a single collection time post-infection. Furthermore, a comprehensive analysis of cellular phenotypes is needed for naturally infected horses. Unfortunately, in clinical horses, there is high variability of sampling in terms of days post-infection and tissue handling. CONCLUSIONS The data show that WNV-challenged horses recruit a mixed T cell population at the onset of neurologic disease.
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Affiliation(s)
- G H Delcambre
- Department of Biomedical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado, USA
| | - J Liu
- Department of Infectious Diseases and Pathology, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - W J Streit
- Department of Neuroscience, College of Medicine, University of Florida, Gainesville, Florida, USA
| | - G P J Shaw
- Department of Neuroscience, College of Medicine, University of Florida, Gainesville, Florida, USA
| | - K Vallario
- Department of Infectious Diseases and Pathology, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - J Herrington
- Department of Infectious Diseases and Pathology, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - N Wenzlow
- Department of Infectious Diseases and Pathology, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - K L Barr
- Department of Infectious Diseases and Pathology, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - M T Long
- Department of Infectious Diseases and Pathology, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
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Abstract
BACKGROUND Medical resident scheduling is difficult due to multiple rules, competing educational goals, and ever-evolving graduate medical education requirements. Despite this, schedules are typically created manually, consuming hours of work, producing schedules of varying quality, and yielding negative consequences for resident morale and learning. OBJECTIVE To determine whether computerized decision support can improve the construction of residency schedules, saving time and improving schedule quality. METHODS The Optimized Residency Scheduling Assistant was designed by a team from the University of Michigan Department of Industrial and Operations Engineering. It was implemented in the C.S. Mott Children's Hospital Pediatric Emergency Department in the 2012-2013 academic year. The 4 metrics of schedule quality that were compared between the 2010-2011 and 2012-2013 academic years were the incidence of challenging shift transitions, the incidence of shifts following continuity clinics, the total shift inequity, and the night shift inequity. RESULTS All scheduling rules were successfully incorporated. Average schedule creation time fell from 22 to 28 hours to 4 to 6 hours per month, and 3 of 4 metrics of schedule quality significantly improved. For the implementation year, the incidence of challenging shift transitions decreased from 83 to 14 (P < .01); the incidence of postclinic shifts decreased from 72 to 32 (P < .01); and the SD of night shifts dropped by 55.6% (P < .01). CONCLUSIONS This automated shift scheduling system improves the current manual scheduling process, reducing time spent and improving schedule quality. Embracing such automated tools can benefit residency programs with shift-based scheduling needs.
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Ekiri AB, Long MT, Hernandez JA. Diagnostic performance and application of a real-time PCR assay for the detection of Salmonella in fecal samples collected from hospitalized horses with or without signs of gastrointestinal tract disease. Vet J 2015; 208:28-32. [PMID: 26797475 DOI: 10.1016/j.tvjl.2015.11.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Revised: 09/30/2015] [Accepted: 11/22/2015] [Indexed: 10/22/2022]
Abstract
The main objective of this study was to assess the diagnostic performance of a real-time polymerase chain reaction (PCR) assay for the detection of Salmonella in fecal samples collected from hospitalized horses with or without signs of gastrointestinal (GI) tract disease. The PCR assay used primers and a probe that targeted the invA gene of Salmonella. Assuming a sensitivity of 100% and a specificity of 96.6%, and a disease prevalence of 2%, 5%, and 10-15% in study horses, the PCR assay had a high (100%) negative predictive value, and a positive predictive value that ranged from 37% in horses without signs of GI disease that tested Salmonella culture-negative, to 60% in horses with signs of GI disease that tested Salmonella culture-negative, to 76-83% in horses with signs of GI disease that tested Salmonella culture-positive. This study provides evidence that the real-time PCR that targets the Salmonella invA gene can be used as a screening test for the detection of Salmonella in feces of hospitalized horses with signs of GI disease. Horses that test PCR-positive can be tested in series using bacteriologic culture to reduce false positive results or to provide additional data (e.g., antibiogram and serotyping data) that can be used to identify potential nosocomial Salmonella infections.
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Affiliation(s)
- A B Ekiri
- Department of Large Animal Clinical Sciences, University of Florida, Gainesville, Florida, USA
| | - M T Long
- Department of Infectious Diseases and Pathology, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - J A Hernandez
- Department of Large Animal Clinical Sciences, University of Florida, Gainesville, Florida, USA.
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Linn KA, Long MT, Pagel PS. "Robo-tripping": dextromethorphan abuse and its anesthetic implications. Anesth Pain Med 2014; 4:e20990. [PMID: 25793175 PMCID: PMC4358333 DOI: 10.5812/aapm.20990] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Revised: 06/29/2014] [Accepted: 07/06/2014] [Indexed: 11/16/2022] Open
Abstract
Introduction: We describe a patient scheduled for elective surgery who regularly consumed approximately 12 to 15 times the maximum recommended daily dose of dextromethorphan. We describe the clinical pharmacology of dextromethorphan and discuss its anesthetic implications. Case Presentation: A 30-year-old man with a history of a nasal fracture was scheduled to undergo an elective septorhinoplasty. He reported daily consumption of large quantities (1440 to 1800 mg) of dextromethorphan for six years. He was previously treated for dextromethorphan dependency on several occasions with urine dextromethorphan levels exceeding 2000 ng/mL. He described marked dissociative effects when abusing the drug, but had abstained from use for 48 hours before his elective surgery. Considering that dextromethorphan has a relatively short half-life and that the patient did not suffer major withdrawal symptoms after voluntarily discontinuing the drug, the authors proceeded with the case while recognizing that the drug has significant neuropsychiatric and sympathetic nervous system stimulant effects resulting from its actions as a N-methyl-D-aspartate receptor antagonist. Conclusions: Anesthesiologists need to be aware of dextromethorphan’s clinical pharmacology because recreational abuse of the drug has become increasingly common in adolescents and young adults.
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Affiliation(s)
- Kelly A Linn
- Anesthesia Service, Clement J. Zablocki Veterans Affairs Medical Center, Milwaukee, Wisconsin, USA
| | - Micah T Long
- Anesthesia Service, Clement J. Zablocki Veterans Affairs Medical Center, Milwaukee, Wisconsin, USA
| | - Paul S Pagel
- Anesthesia Service, Clement J. Zablocki Veterans Affairs Medical Center, Milwaukee, Wisconsin, USA
- Corresponding author: Paul S Pagel, Anesthesia Service, the Clement J. Zablocki Veterans Affairs Medical Center, Milwaukee, Wisconsin, 53295, USA. Tel: +1-4143842000; Fax: 1-4143842939, E-mail:
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Long MT, Wagner D, Maslach-Hubbard A, Pasko DA, Baldridge P, Annich GM. Safety and efficacy of recombinant activated factor VII for refractory hemorrhage in pediatric patients on extracorporeal membrane oxygenation: a single center review. Perfusion 2013; 29:163-70. [DOI: 10.1177/0267659113499782] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Background: Medically refractory hemorrhage in patients on ECMO (extracorporeal membrane oxygenation) support can have catastrophic complications. Recombinant-Activated Factor VII (rFVIIa; NovoSeven®) may provide lifesaving hemostasis; however, there are reports of catastrophic thrombosis related to its administration. Objective: This review attempts to add safety and efficacy data to existing literature regarding the use of rFVIIa for refractory hemorrhage in pediatric patients on ECMO support. Design/Methods: A retrospective chart review was performed for all pediatric patients on ECMO who received rFVIIa for refractory hemorrhage from 2004 to 2009. Data was extracted for each refractory bleeding event, including patient blood loss and transfused blood products in the 6 hours before the first dose, between rFVIIa doses and in the 6 hours after the final dose. For purposes of data collection, a hemorrhagic event was defined as new onset hemorrhage or a hemorrhage occurring at least 12 hours after the most recent dose of rFVIIa. Results: In total, seven patients aged 1 month to 15 years received rFVIIa for 14 different hemorrhagic events. There was no significant difference in blood loss or blood product transfusion associated with rFVIIa administration. There was one patient-related and one ECMO-related complication temporally associated with rFVIIa administration: decreased ECMO circuit oxygenator efficiency and the development of an intra-gastric clot requiring surgical evacuation. Conclusion: These data suggest limited efficacy for rFVIIa use for refractory hemorrhage in pediatric patients on ECMO support. There were two non-catastrophic complications temporally associated with its administration.
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Affiliation(s)
- MT Long
- Department of Pediatrics, University of Michigan, C.S. Mott Children’s Hospital, Ann Arbor, MI, USA
| | - D Wagner
- Departments of Pharmacy and Anesthesiology; University of Michigan, Ann Arbor, MI, USA
| | - A Maslach-Hubbard
- Department of Pediatrics, Division of Pediatric Critical Care, University of Utah, Salt Lake City, UT, USA
| | - DA Pasko
- Department of Pharmacy, University of Michigan, Ann Arbor, MI, USA
| | - P Baldridge
- Department of Pediatrics, Division of Critical Care Medicine, University of Michigan, Ann Arbor, MI, USA
| | - GM Annich
- Pediatric Critical Care, Department of Pediatrics, University of Michigan, Division of Critical Care Medicine, Ann Arbor, MI, USA
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Rios LMV, Sheu JJ, Day JF, Maruniak JE, Seino K, Zaretsky H, Long MT. Environmental risk factors associated with West Nile virus clinical disease in Florida horses. Med Vet Entomol 2009; 23:357-366. [PMID: 19941601 DOI: 10.1111/j.1365-2915.2009.00821.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The objective of this study was to examine the extrinsic risk factors of West Nile virus (WNV) clinical disease in Florida horses as established from confirmed and negative horses tested within the state from 2001 to 2003. An Arboviral Case Information Form (ACF) was submitted by a referring veterinarian at the time of testing to the Florida Department of Agriculture and Consumer Services on every horse suspected of a viral encephalitis in Florida. A follow-up survey that focused on arbovirus prevention and farm ecology was created and mailed to the owner of each tested horse. Data from the follow-up survey indicated peak WNV prevalence in the late summer months in Florida. Quarter horses were the most commonly affected breed. The WNV vaccine was highly protective and natural water on the property also had a protective association. Factors that increased the risk of WNV to horses were the use of fans and a stable construction of solid wood or cement. Some risk indicators were dead birds on the property and other ill animals on the property. Data from this retrospective study have helped identify factors associated with WNV transmission in equines in Florida. Horses that have not been vaccinated and show clinical signs of arboviral infection from June to November should be tested for WNV. Horses that have been vaccinated and show clinical signs should be tested when the vaccination was administered within 1 month or greater than 6 months prior to the onset of clinical symptoms associated with WN infection.
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Affiliation(s)
- L M V Rios
- Department of Entomology and Nematology, University of Florida, Gainesville, Florida 32611, USA.
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Long MT, Gibbs EPJ, Mellencamp MW, Zhang S, Barnett DC, Seino KK, Beachboard SE, Humphrey PP. Safety of an attenuated West Nile virus vaccine, live Flavivirus chimera in horses. Equine Vet J 2008; 39:486-90. [PMID: 18065304 DOI: 10.2746/042516407x214473] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
REASON FOR PERFORMING STUDY West Nile virus (WNV) infection is endemic and able to cause disease in naive hosts. It is necessary therefore to evaluate the safety of new vaccines. OBJECTIVES To establish: 1) the safety of a modified live Flavivirus/West Nile virus (WN-FV) chimera by administration of an overdose and testing for shed of vaccine virus and spread to uninoculated sentinel horses; 2) that this vaccine did not become pathogenic once passaged in horses; and 3) vaccine safety under field conditions. METHODS There were 3 protocols: 1) In the overdose/shed and spread study, horses were vaccinated with a 100x immunogenicity overdose of WN-FV chimera vaccine and housed with sentinel horses. 2) A reversion to virulence study, where horses were vaccinated with a 20x immunogenicity overdose of WN-FV chimera vaccine. Horses in both studies were evaluated for abnormal health conditions and samples obtained to detect virus, seroconversion and dissemination into tissues. 3) In a field safety test 919 healthy horses of various ages, breeds and sex were used. RESULTS Vaccination did not result in site or systemic reactions in either experimental or field-injected horses. There was no shed of vaccine virus, no detection of vaccine virus into tissue and no reversion to virulence with passage. CONCLUSIONS WN-FV chimera vaccine is safe to use in horses with no evidence of ill effects from very high doses of vaccine. There was no evidence of reversion to virulence. In addition, administration of this vaccine to several hundred horses that may have been previously exposed to WNV or WNV vaccine resulted in no untoward reactions. POTENTIAL RELEVANCE These studies establish that this live attenuated Flavivirus chimera is safe to use for immunoprophylaxis against WNV disease in horses.
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Affiliation(s)
- M T Long
- College of Veterinary Medicine, University of Florida, 2015 SW 16th Ave., Gainesville, Florida, USA
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Seino KK, Long MT, Gibbs EPJ, Bowen RA, Beachboard SE, Humphrey PP, Dixon MA, Bourgeois MA. Comparative efficacies of three commercially available vaccines against West Nile Virus (WNV) in a short-duration challenge trial involving an equine WNV encephalitis model. Clin Vaccine Immunol 2007; 14:1465-71. [PMID: 17687109 PMCID: PMC2168174 DOI: 10.1128/cvi.00249-07] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We used a severe challenge model that produces clinical West Nile virus (WNV) disease to test the efficacy of three commercially available equine WNV vaccines in horses. Twenty-four healthy, WNV-seronegative horses of varying ages and genders were placed, in random and blind manner, into three trial groups consisting of eight horses each; two horses in each group received (i) an inactivated WNV vaccine (K-WN), (ii) a modified-live vaccine (CP-WN) containing the WNV prM and E proteins expressed by a canarypox vector, (iii) a live-chimera vaccine (WN-FV) containing WNV prM and E proteins expressed in a YF17D vector, or (iv) a diluent control. Challenge by this model caused grave neurological signs, viremia, moderate to severe histopathologic lesions in the brain and spinal cord, and an outcome of 0% survivorship in all six control horses. In contrast, challenge in horses at between 28 days postvaccination with the chimera vaccine and 56 days postvaccination with the commercial inactivated or modified-live vaccine resulted in 100% survivorship (protection from the onset of WNV encephalitis and viremia). Horses vaccinated with the live-chimera vaccine showed significantly fewer clinical signs than did the control horses (P </= 0.01) and the horses vaccinated with inactivated vaccine (P = 0.035). Mild residual inflammatory lesions were seen in a few of the vaccinated horses.
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Affiliation(s)
- K K Seino
- College of Veterinary Medicine, University of Florida, 2015 SW 16th Avenue, Gainesville, FL 32610, USA.
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Nacewicz BM, Dalton KM, Johnstone T, Long MT, McAuliff EM, Oakes TR, Alexander AL, Davidson RJ. Amygdala volume and nonverbal social impairment in adolescent and adult males with autism. ACTA ACUST UNITED AC 2007; 63:1417-28. [PMID: 17146016 PMCID: PMC4767012 DOI: 10.1001/archpsyc.63.12.1417] [Citation(s) in RCA: 184] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
BACKGROUND Autism is a syndrome of unknown cause, marked by abnormal development of social behavior. Attempts to link pathological features of the amygdala, which plays a key role in emotional processing, to autism have shown little consensus. OBJECTIVE To evaluate amygdala volume in individuals with autism spectrum disorders and its relationship to laboratory measures of social behavior to examine whether variations in amygdala structure relate to symptom severity. DESIGN We conducted 2 cross-sectional studies of amygdala volume, measured blind to diagnosis on high-resolution, anatomical magnetic resonance images. Participants were 54 males aged 8 to 25 years, including 23 with autism and 5 with Asperger syndrome or pervasive developmental disorder not otherwise specified, recruited and evaluated at an academic center for developmental disabilities and 26 age- and sex-matched community volunteers. The Autism Diagnostic Interview-Revised was used to confirm diagnoses and to validate relationships with laboratory measures of social function. MAIN OUTCOME MEASURES Amygdala volume, judgment of facial expressions, and eye tracking. RESULTS In study 1, individuals with autism who had small amygdalae were slowest to distinguish emotional from neutral expressions (P=.02) and showed least fixation of eye regions (P=.04). These same individuals were most socially impaired in early childhood, as reported on the Autism Diagnostic Interview-Revised (P<.04). Study 2 showed smaller amygdalae in individuals with autism than in control subjects (P=.03) and group differences in the relation between amygdala volume and age. Study 2 also replicated findings of more gaze avoidance and childhood impairment in participants with autism with the smallest amygdalae. Across the combined sample, severity of social deficits interacted with age to predict different patterns of amygdala development in autism (P=.047). CONCLUSIONS These findings best support a model of amygdala hyperactivity that could explain most volumetric findings in autism. Further psychophysiological and histopathological studies are indicated to confirm these findings.
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Affiliation(s)
- Brendon M Nacewicz
- Waisman Laboratory for Brain Imaging and Behavior, University of Wisconsin-Madison, Waisman Center, 1500 Highland Avenue, Madison, WI 53705, USA
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Lin JQ, Xiao M, Long MT, Han B, Quian W, Du J. [An efficient mutational method for photosynthetic bacteria]. Mikrobiologiia 2006; 75:758-64. [PMID: 17205800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
The pigment and auxotrophic mutants of Rhodobacter sphaeroides Y6 were obtained by treatment with ethyl methanesulfonate (EMS) followed by lithium chloride (LiCI). Treatment with 0.081 M EPS and subsequent treatment with 0.071 M LiCI resulted in 12% higher frequency of pigment mutations than application of 0.081 M EMS alone; the frequency of auxotrophic mutations increased 2.5-fold when treatment with lithium chloride was applied. A blue shift 10 nm was recorded in the absorption spectrum of carotenoids form YM5-3 green mutant; considerable accumulation of neurosporine was revealed by HPLC and mass spectrometry. The method is efficient for isolating mutants of photosynthetic bacteria.
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Oaks JL, Long MT, Baszler TV. Leukoencephalitis associated with selective viral replication in the brain of a pony with experimental chronic equine infectious anemia virus infection. Vet Pathol 2004; 41:527-32. [PMID: 15347829 DOI: 10.1354/vp.41-5-527] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Neurologic disease occurs sporadically in horses infected with the equine infectious anemia virus (EIAV). This report describes a case of clinically severe neurologic disease in a pony experimentally infected with EIAV. This pony did not have fever or anemia, which are the characteristic clinical signs of disease. The histopathologic changes were characterized as lymphohistiocytic periventricular leukoencephalitis. Polymerase chain reaction and in situ hybridization data showed that the brain lesions were directly associated with viral replication and that high-level viral replication occurred selectively within the lesion and not in other tissues. These findings suggest that EIAV-associated neurologic disease is the direct result of viral replication.
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Abstract
Patulin is known to become analytically non-detectable during the production of cider from contaminated apple juice. The fate of [14C]-labelled patulin during the alcoholic fermentation of apple juice was studied. Three commercial cider strains of Saccharomyces cerevisiae degraded patulin during active fermentative growth, but not when growing aerobically. The products of patulin degradation were more polar than patulin itself and remained in the clarified fermented cider. Patulin did not appear to bind to yeast cells or apple juice sediment in these model experiments. HPLC analysis of patulin-spiked fermentations showed the appearance of two major metabolites, one of which corresponded by both TLC and HPLC to E-ascladiol prepared by the chemical reduction of patulin using sodium borohydride. Using a diode array detector, both metabolites had a lambda(max) = 271 nm, identical to that of ascladiol. The nmr spectrum of a crude preparation of these metabolites showed signals corresponding to those of the E-ascladiol prepared chemically and a weaker set of signals corresponding to those reported in the literature for Z-ascladiol.
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Affiliation(s)
- M O Moss
- School of Biomedical and Life Sciences, University of Surrey, Guildford, UK
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Long MT, Baszler TV. Neutralization of maternal IL-4 modulates congenital protozoal transmission: comparison of innate versus acquired immune responses. J Immunol 2000; 164:4768-74. [PMID: 10779783 DOI: 10.4049/jimmunol.164.9.4768] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
IL-4 levels were modulated in mice to test the hypothesis that induction of a maternal type 1 response would decrease the frequency of congenital Neospora caninum transmission. This hypothesis tested the relationship between IL-4 and both innate and adaptive immunity utilizing two basic experimental designs. In the first, maternal IL-4 was neutralized with mAb during pregnancy in naive mice concomitant with initial, virulent infection. In the second, maternal IL-4 was neutralized before pregnancy concomitant with a priming inoculation consisting of live, avirulent N. caninum tachyzoites followed by virulent challenge during subsequent gestation. In mice that were naive before pregnancy, neutralization of IL-4 during gestational challenge did not result in decreased congenital transmission as measured by PCR performed on 1-day-old neonatal mice. In mice that were primed and modulated before pregnancy, congenital transmission from gestational challenge was significantly decreased compared with control mice. Reduction in transmission constituted a decrease in the numbers of mice transmitting N. caninum and a lower frequency of transmission by individual dams (p < 0.05). Decreased congenital transmission was associated with significantly lower levels of maternal splenocyte IL-4 secretion, lower IL-4 mRNA levels, and higher levels of IFN-gamma secretion. Protected mice had significantly decreased Neospora-specific IgG1 compared with nonmodulated mice. These studies define a relationship between maternal Ag-specific immunity and the frequency of congenital transmission and demonstrate that modulation of type 2 cytokine responses can change the frequency of congenital protozoal transmission.
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Affiliation(s)
- M T Long
- Department of Large Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL 32610, USA.
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Abstract
ABSTRACT
The routine diagnosis of
Neospora caninum
abortion is based upon histopathologic changes in fetal tissues and identification of tissue parasites by immunohistochemistry. Confirmation of
N. caninum
infection by immunohistochemistry has low sensitivity. In the present study, we examined the utility of PCR in detecting
N. caninum
infection in fetal tissues from spontaneous bovine abortion. DNA was obtained from fresh and formalin-fixed tissues from 61 bovine fetuses submitted for abortion diagnosis. Histopathology and immunohistochemistry determined the true status of
N. caninum
infection in each fetus. In formalin-fixed paraffin-embedded tissues, PCR detected
N. caninum
DNA in 13 of 13 true-positive fetuses (100%) and in 1 of 16 true-negative fetuses (6%). In fresh or frozen tissues, PCR detected
N. caninum
DNA in 10 of 13 true-positive fetuses (77%) and 0 of 11 true-negative fetuses (0%). PCR also detected
N. caninum
DNA in 6 of 8 fetuses that had typical lesions of
N. caninum
but were immunohistochemistry negative, indicating a higher sensitivity of PCR in comparison to that of immunohistochemistry.
N. caninum
DNA was amplified most consistently from brain tissue. PCR detection of
N. caninum
DNA in formalin-fixed, paraffin-embedded tissues was superior to that in fresh tissues, presumably because of the increased accuracy of sample selection inherent in histologic specimens.
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Affiliation(s)
- T V Baszler
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, Washington 99164-7040, USA.
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Baszler TV, Long MT, McElwain TF, Mathison BA. Interferon-gamma and interleukin-12 mediate protection to acute Neospora caninum infection in BALB/c mice. Int J Parasitol 1999; 29:1635-46. [PMID: 10608450 DOI: 10.1016/s0020-7519(99)00141-1] [Citation(s) in RCA: 134] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The type of immune response required to protect mice against clinical disease during acute Neospora caninum challenge was investigated in BALB/c mice. Groups of female BALB/c mice were infected i.p. with N. caninum tachyzoites concomitant with either: (1) antibody to interferon-gamma; (2) recombinant murine interleukin-12; or (3) recombinant murine interleukin-12 plus antibody to interferon-gamma. Mice treated with anti-interferon-gamma alone had increased morbidity/mortality, decreased body weight, increased foci of liver necrosis and increased numbers of N. caninum tachyzoites in the lung by 7 days p.i. compared with controls. Increased disease and parasite load in the anti-interferon-gamma-treated mice was associated with antigen-specific antibody IgG1 > IgG2a and a three-fold decreased ratio of antigen-specific interferon-gamma:interleukin-4. Mice treated with recombinant murine interleukin-12 had decreased encephalitis and brain parasite load at 3 weeks p.i. compared with control mice treated with PBS. In recombinant murine interleukin-12-treated mice, decreased brain lesions and parasite load were associated with antigen-specific antibody IgG2a > IgG1 and a three-fold increased ratio of antigen-specific interferon-gamma:interleukin-4 from splenocytes; the interleukin-12 effect was dependent upon interferon-gamma, as indicated by concomitant in vivo interferon-gamma neutralisation. By 6 weeks p.i. with N. caninum, there were no differences in brain lesions and parasite load between interleukin-12- and PBS-treated groups, indicating that the effects of interleukin-12 on driving a protective type 1 response were transient. These data indicate a role for interferon-gamma, interleukin-12 and type 1 immune responses in control of acute neosporosis in mice.
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Affiliation(s)
- T V Baszler
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman 99164-7040, USA.
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Long MT, Baszler TV, Mathison BA. Comparison of intracerebral parasite load, lesion development, and systemic cytokines in mouse strains infected with Neospora caninum. J Parasitol 1998; 84:316-20. [PMID: 9576505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Neospora caninum, an apicomplexan parasite closely related to Toxoplasma gondii, causes abortion, stillbirths, and congenital neurologic disease in multiple animal species. The present study focuses on the development of encephalitis and intracerebral parasite load that occurs 6 wk postinfection (PI). Utilizing BALB/c, C57BL/6, and B10.D2 mice, an initial investigation was undertaken to determine the relative resistance of inbred strains to N. caninum-induced encephalitis. Relative resistance was defined in terms of central nervous system lesion development and parasite load. Based on other protozoal infections in mice, it was hypothesized that BALB/c and C57BL/6 should be contrasting in their relative resistance to N. caninum, with BALB/c and congenic B10.D2 mice less susceptible than C57BL/6 mice. Contrary to expectation, BALB/c and C57BL/6 were both highly susceptible to the development of N. caninum-induced encephalitis, whereas B10.D2 mice were resistant. Both BALB/c mice and C57BL/6 mice had significantly higher numbers of brain lesions and intracerebral tachyzoites than B10.D2 mice. Resistance in B10.D2 was associated with a high interferon (IFN)-gamma: interleukin (IL)-4 ratio from antigen-stimulated splenocytes, whereas susceptibility in C57BL/6 and BALB/c mice corresponded with a low splenocyte IFN-gamma: IL-4 ratio. In vivo measurement of Neospora-specific isotype antibodies demonstrated predominately IgG2a in serum from B10.D2 mice and IgG1 in serum from BALB/c and C57BL/6 mice. In conclusion, susceptibility of mice to N. caninum is unique compared to other protozoal diseases. The present study also demonstrates that parasite load is a fundamental measurement for evaluating disease induced by N. caninum and that a type 1 cytokine response may be necessary for regulation of this parameter.
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Affiliation(s)
- M T Long
- Department of Veterinary Pathology and Microbiology, Washington State University College of Veterinary Medicine, Pullman 99164-7040, USA
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Long MT, Bartholomew BA, Smith MJ, Trudgill PW, Hopper DJ. Enzymology of oxidation of tropic acid to phenylacetic acid in metabolism of atropine by Pseudomonas sp. strain AT3. J Bacteriol 1997; 179:1044-50. [PMID: 9023182 PMCID: PMC178796 DOI: 10.1128/jb.179.4.1044-1050.1997] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Pseudomonas sp. strain AT3 grew with dl-tropic acid, the aromatic component of the alkaloid atropine, as the sole source of carbon and energy. Tropic acid-grown cells rapidly oxidized the growth substrate, phenylacetaldehyde, and phenylacetic acid. Crude cell extracts, prepared from dl-tropic acid-grown cells, contained two NAD+-linked dehydrogenases which were separated by ion-exchange chromatography and shown to be specific for their respective substrates, dl-tropic acid and phenylacetaldehyde. Phenylacetaldehyde dehydrogenase was relatively unstable. The stable tropic acid dehydrogenase was purified to homogeneity by a combination of ion-exchange, molecular-sieve, and affinity chromatography. It had a pH optimum of 9.5 and was equally active with both enantiomers of tropic acid, and at this pH, phenylacetaldehyde was the only detectable product of tropic acid oxidation. The formation of phenylacetaldehyde from tropic acid requires, in addition to dehydrogenation, a decarboxylation step. By analogy with NAD+-specific isocitrate and malate dehydrogenases, phenylmalonic semialdehyde, a 3-oxoacid, would be expected to be the precursor of phenylacetaldehyde. Other workers have established that isocitrate and malate dehydrogenases catalyze the decarboxylation of enzyme-bound or added 3-oxoacid intermediates, a reaction that requires Mn2+ or Mg2+ ions. Studies with tropic acid dehydrogenase were hampered by lack of availability of phenylmalonic semialdehyde, but in the absence of added divalent metal ions, both enantiomers of tropic acid were completely oxidized and we have not, by a number of approaches, found any evidence for the transient accumulation of phenylmalonic semialdehyde.
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Affiliation(s)
- M T Long
- Institute of Biological Sciences, University of Wales, Aberystwyth, United Kingdom
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Long MT, Baszler TV. Fetal loss in BALB/C mice infected with Neospora caninum. J Parasitol 1996; 82:608-11. [PMID: 8691368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
The suitability of mice as a model for reproductive loss due to Neospora caninum infection was investigated. Groups of mice were infected with 2 x 10(6) N. caninum before pregnancy (10 days) and during pregnancy (days 5 and 10 of gestation). In mice infected before and during early pregnancy, fetal loss was evaluated throughout gestation, and pregnancy loss was evaluated by enumeration of fetal resorptions and total fetuses. In mice infected before pregnancy, no difference was present in resorptions between infected and control mice, although litter size was decreased in the infected mice (P < 0.05). In mice infected during early pregnancy (day 5 gestation) and examined temporally throughout gestation, resorptions were increased in the infected mice compared to the control mice (P < 0.05). In mice infected at 5 days gestation and examined at one time point (day 14 of gestation), the resorption rate for infected mice was 33% and 12% for controls (P < 0.05). Routine histopathologic examination and immunohistochemistry using N. caninum-specific antisera did not identify tachyzoites in placental and fetal tissues during the pre- and early pregnancy infections. In mice infected late midgestation (day 10), N. caninum tachyzoites were identified in placenta and fetal muscle and neural tissue. In the placenta, there was multifocal necrosis and hemorrhage with intralesional tachyzoites. Tachyzoites in fetal tissues were not associated with pathologic changes. No reproductive loss was associated with mice infected late in gestation. These data demonstrate that mice can be used as a model for the study of fetal resorption and congenital infection associated with N. caninum.
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Affiliation(s)
- M T Long
- Department of Veterinary Microbiology and Pathology, Washington State University, College of Veterinary Medicine, Pullman 99164-7040, USA
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Long MT, Goetz TE, Kakoma I, Whiteley HE, Lock TE, Holland CJ, Foreman JH, Baker GJ. Evaluation of fetal infection and abortion in pregnant ponies experimentally infected with Ehrlichia risticii. Am J Vet Res 1995; 56:1307-16. [PMID: 8928947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Fetal infectivity of Ehrlichia risticii was investigated in 19 ponies that were E risticii negative on the basis of results of an indirect fluorescent antibody (IFA) test. Thirteen pregnant ponies were infected by IV administration of E risticii between 90 and 180 days of gestation. Six pregnant ponies served as noninfected controls. Each infected pony had clinical signs of equine monocytic ehrlichiosis, was confirmed to be ehrlichemic, and developed an IFA titer to E risticii. Two infected ponies became recumbent, were unresponsive to supportive care, and were euthanatized. After recovery from clinical illness, the remaining ponies were observed throughout gestation for reproductive abnormalities. On abortion, each fetus was necropsied and tissue specimens from the liver, bone marrow, spleen, colon, and mesenteric lymph nodes were inoculated into canine monocyte cell cultures. Six infected ponies aborted at a mean 217 days of gestation, which was between postinoculation days 65 and 111. Five fetuses were recovered for evaluation, and E risticii was isolated from 4 of them. All 5 fetuses recovered had similar histologic finding, including enterocolitis, periportal hepatitis, and lymphoid hyperplasia with necrosis of the mesenteric lymph nodes and spleen. All 5 fetuses tested negative for IgG to E risticii, although 3 had low IgM titer to E risticii. The remaining 5 infected ponies had normal parturition. Presuckle IFA titer to E risticii was measured in 4 of the term foals, and results for 3 were positive. Two foals from infected ponies were monitored for 6 months and daily gain in body weight was comparable to that of a control foal. None of the control ponies became ill or seroconverted during the clinical illness phase, and none aborted throughout gestation Two control ponies seroconverted to E risticii 6 weeks before parturition. Results of this study indicate that E ristcii is a primary abortifacient under experimental conditions.
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Affiliation(s)
- M T Long
- Department of Veterinary Medicine, College of Veterinary Medicine, University of Illinois, Urbana 61801, USA
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Abstract
The oxidation of morphine by washed-cell incubations of Pseudomonas putida M10 gave rise to a large number of transformation products including hydromorphone (dihydromorphinone), 14 beta-hydroxymorphine, 14 beta-hydroxymorphinone, and dihydromorphine. Similarly, in incubations with oxymorphone (14 beta-hydroxydihydromorphinone) as substrate, the major transformation product was identified as oxymorphol (14 beta-hydroxydihydromorphine). The identities of all these biological products were confirmed by mass spectrometry and 1H nuclear magnetic resonance spectroscopy. This is the first report describing structural evidence for the biological synthesis of 14 beta-hydroxymorphine and 14 beta-hydroxymorphinone. These products have applications as intermediates in the synthesis of semisynthetic opiate drugs.
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Affiliation(s)
- M T Long
- Institute of Biotechnology, University of Cambridge, United Kingdom
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French CE, Hailes AM, Rathbone DA, Long MT, Willey DL, Bruce NC. Biological production of semisynthetic opiates using genetically engineered bacteria. Biotechnology (N Y) 1995; 13:674-6. [PMID: 9634804 DOI: 10.1038/nbt0795-674] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Semisynthetic derivatives of morphine and related alkaloids are in widespread clinical use. Due to the complexity of these molecules, however, chemical transformations are difficult to achieve in high yields. We recently identified the powerful analgesic hydromorphone as an intermediate in the metabolism of morphine by Pseudomonas putida M10. Here we describe the construction of recombinant strains of Escherichia coli that express morphine dehydrogenase and morphinone reductase. These strains are capable of efficiently transforming the naturally occurring alkaloids morphine and codeine to hydromorphone and the antitussive hydrocodone, respectively. Our results demonstrate the potential for recombinant DNA technology to provide biological routes for the synthesis of known and novel semisynthetic opiate drugs.
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Affiliation(s)
- C E French
- Institute of Biotechnology, University of Cambridge, U.K
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Affiliation(s)
- B T Bell
- Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois, Urbana, USA
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