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Olotu C, Lebherz L, Ascone L, Scherwath A, Kühn S, Härter M, Kiefmann R. Cognitive Deficits in Executive and Language Functions Predict Postoperative Delirium. J Cardiothorac Vasc Anesth 2023; 37:2552-2560. [PMID: 37778949 DOI: 10.1053/j.jvca.2023.08.154] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 08/18/2023] [Accepted: 08/31/2023] [Indexed: 10/03/2023]
Abstract
OBJECTIVES Postoperative delirium (POD) remains the most common complication in older adults, with cognitive impairment being the main risk factor. Patients with mild cognitive impairment, in particular, have much to lose from delirium; despite this, their cognitive impairment might be clinically overlooked. Understanding which cognitive domains are particularly predictive in this regard may improve the sensitivity of preoperative testing and allow for a more targeted application of resource-intensive measures to prevent delirium in the perioperative period. The authors conducted this study with the aim of identifying the most indicative cognitive domains. DESIGN A secondary analysis of a randomized controlled trial. SETTING At a single center, the University Medical Centre Hamburg in Hamburg, Germany. PARTICIPANTS Patients ≥60 years without major neurocognitive disorders (dementia, Mini-Mental State Examination score ≤23) scheduled for cardiovascular surgery. MEASUREMENTS AND MAIN RESULTS Preoperative neuropsychologic testing and delirium screening were performed twice daily until postoperative day 5. A multiple logistic regression model was applied to determine the predictive ability of test performances for the development of delirium. RESULTS A total of 541 patients were included in the analysis; the delirium rate was 15.6%. After controlling for confounders, only low performance within the Trail Making Test B/A (odds ratio [OR] = 1.32; 95% CI: 1.05-1.66) and letter fluency (OR = 0.66; 95% CI: 0.45-0.96) predicted a particularly high risk for delirium development. The discriminative ability of the final multiple logistic regression model to predict POD had an area under the curve of 0.786. CONCLUSIONS Impairment in the cognitive domains of executive function and language skills associated with memory, inhibition, and access speed seem to be particularly associated with the development of delirium after surgery in adults ≥65 years of age without apparent preoperative neurocognitive impairment.
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Affiliation(s)
- Cynthia Olotu
- Department of Anaesthesiology, University Medical Center Hamburg, Hamburg, Germany.
| | - Lisa Lebherz
- Institute of Medical Psychology, University Medical Center Hamburg, Hamburg, Germany
| | - Leonie Ascone
- Department of Psychiatry and Psychotherapy, University Medical Center Hamburg, Hamburg, Germany
| | - Angela Scherwath
- Institute of Medical Psychology, University Medical Center Hamburg, Hamburg, Germany; Department of Stem Cell Transplantation, University Medical Center Hamburg, Hamburg, Germany
| | - Simone Kühn
- Department of Psychiatry and Psychotherapy, University Medical Center Hamburg, Hamburg, Germany
| | - Martin Härter
- Institute of Medical Psychology, University Medical Center Hamburg, Hamburg, Germany
| | - Rainer Kiefmann
- Department of Anaesthesiology, University Medical Center Hamburg, Hamburg, Germany; Anesthesia Department, Rotkreuzklinikum Munich, Munich, Germany
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Zastrow I, Tohsche P, Loewen T, Vogt B, Feige M, Behnke M, Wolff A, Kiefmann R, Olotu C. Comparison of the '4-item assessment test' and 'nursing delirium screening scale' delirium screening tools on non-intensive care unit wards: A prospective mixed-method approach. Eur J Anaesthesiol 2021; 38:957-965. [PMID: 33606422 DOI: 10.1097/eja.0000000000001470] [Citation(s) in RCA: 3] [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: 11/26/2022]
Abstract
BACKGROUND In elderly patients following surgery, postoperative delirium (POD) is the most frequent complication and is associated with negative outcomes. The 2017 European Society of Anaesthesiology guideline on POD aims to improve patient care by implementing structured delirium prevention, diagnosis and treatment. However, these recommendations, especially systematic delirium screening, are still incompletely adopted in clinical practice. The aim of this study was to evaluate the feasibility and acceptance of validated delirium screening tools and to identify barriers to their implementation on nonintensive care unit wards. METHODS Screening rates, as well as practicability, acceptance and the interprofessional handling of positive results, were assessed for each group. Screening rates were calculated as a percentage of the total potential testing episodes completed (up to 15 per patient). Patients were considered eligible when aged 65 years and above. Barriers and motivating factors were assessed in a mixed method approach by utilising questionnaires and focus group discussions. INTERVENTION In a 3-month phase, a guideline-compliant screening protocol involving screening for POD three times daily for 5 days following surgery was introduced in five wards: both the 4-item assessment test (4AT) and the nursing delirium screening scale (NuDESC) were used. Before commencing the study and again after 6 weeks, medical staff of the respective wards underwent a 45 min training session. RESULTS Of a total of 3183 potential testing episodes, 999 (31.4%) were completed, with more NuDESC observational tests (43%) than 4AT bedside tests completed (20%). The 4AT was considered more difficult to integrate into daily working routines, it took longer to administer, and nurses felt uncomfortable conducting the screening (53 vs. 13%). Screening results indicating delirium were often not discussed within the team (47%), and nurses felt that often such results were not taken seriously by physicians (54%). CONCLUSION The observational NuDESC showed a higher completion rate than the bedside 4AT, although overall testing rates were low. The necessary time needed to conduct the screening, the negative reactions by patients, insufficient team communication and a lack of initiation of any therapy were identified as major barriers in the implementation of the guideline-compliant screening protocol. For all staff, further education and awareness of the importance of POD diagnosis and treatment might improve the screening rates. The NuDesc received better results concerning acceptance, practicability and introduction into daily work routine, leading to higher screening rates compared with the 4AT. The latter instrument, which was intended to be used rather selectively or when POD is suspected, might therefore not be suitable for guideline-compliant regular and repeated screening for POD.
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Affiliation(s)
- Inke Zastrow
- From the Department of Patient and Care Management (IZ, BV, MF), Department of Intensive Care Medicine (PT, AW) and Department of Anaesthesiology (TL, MB, RK, CO), Centre of Anaesthesiology and Intensive Care Medicine, University Medical Centre, Hamburg, Germany
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Abstract
As octogenarians in the operation room are no longer an exemption but the norm, perioperative management needs to be adopted to meet the special requirements of this group of patients. Anaesthesia does not need to be re-invented to fit the elderly. However, as elderly patients are among those most affected by adverse postoperative outcomes, the same diligence that is as a matter of course exercised in anaesthesiologic care of the youngest patients needs to be exercised for the eldest as well. Aging is associated with characteristic physiologic changes and an overall reduction in compensation width. However, the individual relevance of these changes varies distinctly. A comprehensive preoperative assessment is therefore essential to identify those at high risk. Maintaining functionality and preventing cognitive decline are central elements of perioperative care for frail elders, often only requiring unspectacular, but effective adjustments to established routine care processes. This review focuses on current recommendations in the perioperative anaesthesiologic management of elderly patients with a view towards assisting clinical anaesthesiologists in implementing respective structures in their setting and adjusting care pathways to meet the needs of this vulnerable but growing group of patients and improve their postoperative outcome.
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Affiliation(s)
- Cynthia Olotu
- Geriatric Anaesthesiology Research Group, Department of Anaesthesiology, Centre of Anaesthesiology and Intensive Care Medicine, University Medical Centre Hamburg, Hamburg, Germany - .,Commission of Geriatric Anaesthesiology, German Society of Anaesthesiology and Intensive Care Medicine -
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Richter J, Schönfeld MS, Langebrake C, Bergelt C, Kriston L, Olotu C, Kiefmann R. Pharmaceutical management of elderly high-risk patients in perioperative settings (PHAROS): protocol of a pilot sequential intervention study. BMJ Open 2020; 10:e039094. [PMID: 33158825 PMCID: PMC7651720 DOI: 10.1136/bmjopen-2020-039094] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 08/08/2020] [Accepted: 10/11/2020] [Indexed: 11/12/2022] Open
Abstract
INTRODUCTION With increasing age, the risk of complications after surgery rises in elderly patients. Furthermore, the prevalence of multimorbidity and polypharmacy rises with age, making this elderly population especially vulnerable for drug-related problems and posing an additional risk for postoperative complications. Still, only few studies have concentrated on investigating how medication safety can be improved in these patients. The aim of this pilot study is to examine the impact of a comprehensive intervention (interprofessional systematic medication therapy management) on medication appropriateness in elderly polymedicated, multimorbid patients during hospital stay for elective surgery. METHODS AND ANALYSIS This pilot study will include a total number of 140 patients. Surgical high-risk patients ≥65 years taking more than five chronic systemic drugs will be recruited consecutively for 9 months in the control group capturing usual care regarding medication history and in-hospital medication therapy management without any study intervention. Recruitment of the intervention group will be conducted for another 9 months. The intervention consists of the following components: an additional medication history by a hospital pharmacist before admission, a subsequent medication review, optimisation of the long-term medication and recommendations to the patient's general practitioner. A follow-up will be performed 3 months after surgery. As the primary study outcome, medication appropriateness will be measured using the Medication Appropriateness Index.Secondary outcomes are postoperative complications, incidence and frequency of adverse drug reactions and potentially inappropriate medication in the elderly, satisfaction with inpatient and outpatient care, medication reconciliation and health-related quality of life. Multivariable analyses will be used to analyse all quantitative research questions. ETHICS AND DISSEMINATION Ethics approval was obtained by the medical ethics committee of the Medical Chamber of Hamburg (study ID: PV5754). Data will be published in peer-reviewed journals and presented at conferences. TRIAL REGISTRATION NUMBER The study is registered at www.drks.de: DRKS00014621.
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Affiliation(s)
- Julia Richter
- Hospital Pharmacy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | | | - Claudia Langebrake
- Hospital Pharmacy, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- Department of Stem Cell Transplantation, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Corinna Bergelt
- Department of Medical Psychology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Levente Kriston
- Department of Medical Psychology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Cynthia Olotu
- Department of Anaesthesiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Rainer Kiefmann
- Department of Anaesthesiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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Olotu C. ["Emergency anesthesia" in geriatric patients]. Med Klin Intensivmed Notfmed 2019; 115:16-21. [PMID: 31832699 DOI: 10.1007/s00063-019-00635-5] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 10/23/2019] [Accepted: 11/08/2019] [Indexed: 11/27/2022]
Abstract
BACKGROUND The share of elderly patients undergoing emergency surgery is constantly increasing. Their postoperative outcome remains poor, even if surgery itself is survived in the short or medium term. OBJECTIVES Important aspects of anesthesiologic care for older emergency patients based upon recent literature and guideline recommendations are presented. METHODS Selective review of the literature, considering national and international guidelines, meta-analysis and Cochrane reviews. CONCLUSION Anesthesiologic care can significantly influence the perioperative outcome of elderly emergency surgery patients. In this context, emergency anesthesiology exceeds mere anesthesia itself and applies to the overall perioperative management.
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Affiliation(s)
- Cynthia Olotu
- Klinik und Poliklinik für Anästhesiologie, Zentrum für Anästhesiologie und Intensivmedizin, Universitätsklinikum Hamburg-Eppendorf, Martinistraße 52, 22051, Hamburg, Deutschland.
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Olotu C, Lebherz L, Härter M, Mende A, Plümer L, Goetz AE, Zöllner C, Kriston L, Kiefmann R. Improvement of perioperative care of the elderly patient (PeriAge): protocol of a controlled interventional feasibility study. BMJ Open 2019; 9:e031837. [PMID: 31767591 PMCID: PMC6886921 DOI: 10.1136/bmjopen-2019-031837] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
INTRODUCTION Geriatric patients have a pronounced risk to suffer from postoperative complications. While effective risk-specific perioperative measures have been studied in controlled experimental settings, they are rarely found in routine healthcare. This study aims (1) to implement a multicomponent preoperative and intraoperative intervention, and investigate its feasibility, and (2) exploratorily assess the effectiveness of the intervention in routine healthcare. METHODS AND ANALYSIS Feasibility and exploratory effectiveness of the intervention will be investigated in a monocentric, prospective, non-randomised, controlled trial. The intervention includes systematic information for patients and family about measures to prevent postoperative complications; preoperative screening for frailty, malnutrition, strength and mobility with nutrient supplementation and physical exercise (prehabilitation) as needed. Further components focus on potentially inadequate medication, patient blood-management and carbohydrate loading prior to surgery, retainment of orientation aids in the operating room and a geriatric anaesthesia concept. Data will successively be collected from control, implementation and intervention groups. Patients aged 65+ with impending surgery will be included. A sample size of 240, n=80 per group, is planned. Assessments will take place at inclusion and 2, 30 and 180 days after surgery. Mixed-methods analyses will be performed. Exploratory effectiveness will be assessed using mixed segmented regressions. The primary endpoint is functional status. Secondary endpoints include cognitive performance, health-related quality of life, length of inpatient stay and occurrence of postoperative complications. Feasibility will be assessed through semi-structured interviews with staff and patients and quantitative analyses of the data quality, focussing on practicability, acceptance, adoption and fidelity to protocol. ETHICS AND DISSEMINATION The study will be carried out in accordance with the Helsinki Declaration and to principles of good scientific practice. The Ethics Committee of the Medical Association Hamburg, Germany, approved the protocol (study ID: PV5596). Results will be disseminated in scientific journals and healthcare conferences. TRIAL REGISTRATION NUMBER ClinicalTrials.gov Identifier: NCT03325413.
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Affiliation(s)
- Cynthia Olotu
- Department of Anaesthesiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Lisa Lebherz
- Department of Medical Psychology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Martin Härter
- Department of Medical Psychology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Anna Mende
- Department of Anaesthesiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Lili Plümer
- Department of Anaesthesiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Alwin E Goetz
- Department of Anaesthesiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Christian Zöllner
- Department of Anaesthesiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Levente Kriston
- Department of Medical Psychology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Rainer Kiefmann
- Department of Anaesthesiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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Mende A, Riegel AK, Plümer L, Olotu C, Goetz AE, Kiefmann R. Determinants of Perioperative Outcome in Frail Older Patients. Dtsch Arztebl Int 2019; 116:73-82. [PMID: 30950393 DOI: 10.3238/arztebl.2019.0073] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 07/17/2018] [Accepted: 10/24/2018] [Indexed: 02/07/2023]
Abstract
BACKGROUND Older patients are undergoing surgery in increasing numbers. Frailty is a key risk factor associated with higher rates of complications and mortality, longer hospital stays, and functional impairment. METHODS This review is based on pertinent publications retrieved by a selective search in PubMed, including guidelines from Germany and abroad. RESULTS Many studies have been published on the assessment of frailty and its consequences, but the scientific investigation of this topic and the clinical utility of the findings are made more difficult by the lack of a uniform definition and of uniform instruments for assessment. Some definitions of frailty include only physical aspects, while others encompass cognitive, emotional, and social factors as well. Despite this variability, the assessment of frailty enables better estimation of the perioperative risk so that the patient can be optimally prepared for the operation. Especially for frail elderly patients, an interdisciplinary approach is called for over the entire perioperative treatment period. CONCLUSION In the future, the definition of frailty will need to be standardized so that this parameter can be properly assessed and investigated in comparative studies.
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Affiliation(s)
- Anna Mende
- Department of Anesthesiology, University Medical Center Hamburg-Eppendorf (UKE); Rotkreuzklinikum München
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Olotu C, Lehmensiek F, Koch B, Kiefmann M, Riegel AK, Hammerschmidt S, Kiefmann R. Streptococcus pneumoniae inhibits purinergic signaling and promotes purinergic receptor P2Y 2 internalization in alveolar epithelial cells. J Biol Chem 2019; 294:12795-12806. [PMID: 31289122 DOI: 10.1074/jbc.ra118.007236] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 06/28/2019] [Indexed: 12/14/2022] Open
Abstract
Bacterial pneumonia is a global health challenge that causes up to 2 million deaths each year. Purinergic signaling plays a pivotal role in healthy alveolar epithelium. Here, we used fluorophore-based analysis and live-cell calcium imaging to address the question of whether the bacterial pathogen Streptococcus pneumoniae directly interferes with purinergic signaling in alveolar epithelial cells. Disturbed purinergic signaling might result in pathophysiologic changes like edema formation and atelectasis, which are commonly seen in bacterial pneumonia. Purine receptors are mainly activated by ATP, mediating a cytosolic calcium response. We found that this purinergic receptor P2Y2-mediated response is suppressed in the presence of S. pneumoniae in A549 and isolated primary alveolar cells in a temperature-dependent manner. Downstream inositol 3-phosphate (IP3) signaling appeared to be unaffected, as calcium signaling via protease-activated receptor 2 remained unaltered. S. pneumoniae-induced suppression of the P2Y2-mediated calcium response depended on the P2Y2 phosphorylation sites Ser-243, Thr-344, and Ser-356, which are involved in receptor desensitization and internalization. Spinning-disk live-cell imaging revealed that S. pneumoniae induces P2Y2 translocation into the cytosol. In conclusion, our results show that S. pneumoniae directly inhibits purinergic signaling by inducing P2Y2 phosphorylation and internalization, resulting in the suppression of the calcium response of alveolar epithelial cells to ATP, thereby affecting cellular integrity and function.
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Affiliation(s)
- Cynthia Olotu
- Center for Anesthesiology and Intensive Care Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 22051 Hamburg, Germany
| | - Felix Lehmensiek
- Center for Anesthesiology and Intensive Care Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 22051 Hamburg, Germany
| | - Bastian Koch
- Center for Anesthesiology and Intensive Care Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 22051 Hamburg, Germany
| | - Martina Kiefmann
- Center for Anesthesiology and Intensive Care Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 22051 Hamburg, Germany
| | - Ann-Kathrin Riegel
- Center for Anesthesiology and Intensive Care Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 22051 Hamburg, Germany
| | - Sven Hammerschmidt
- Institute of Genetics and Functional Genomics, Department of Molecular Genetics and Infection Biology, University of Greifswald, Felix-Hausdorff-Strasse 8, 17489 Greifswald, Germany
| | - Rainer Kiefmann
- Center for Anesthesiology and Intensive Care Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 22051 Hamburg, Germany
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Affiliation(s)
- Cynthia Olotu
- *Universitätsklinikum Hamburg-Eppendorf Klinik und Poliklinik für Anästhesiologie Hamburg,Germany
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10
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Olotu C, Weimann A, Bahrs C, Schwenk W, Scherer M, Kiefmann R. The Perioperative Care of Older Patients. Dtsch Arztebl Int 2019; 116:63-69. [PMID: 30950385 PMCID: PMC6444041 DOI: 10.3238/arztebl.2019.0063] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Revised: 08/21/2018] [Accepted: 12/18/2018] [Indexed: 12/12/2022]
Abstract
BACKGROUND Elderly patients are a growing and vulnerable group with an elevated perioperative risk. Perioperative treatment pathways that take these patients' special risks and requirements into account are often not implemented in routine clinical practice. METHODS This review is based on pertinent publications retrieved by a selective search in PubMed, the AWMF guideline database, and the Cochrane database for guidelines from Germany and abroad, meta-analyses, and Cochrane reviews. RESULTS The care of elderly patients who need surgery calls for an interdisciplinary, interprofessional treatment concept. One component of this concept is preoperative preparation of the patient ("prehabilitation"), which is best initiated before hospital admission, e.g., correction of deficiency states, optimization of chronic drug treatment, and respiratory training. Another important component consists of pre-, intra-, and postoperative measures to prevent delirium, which can lower the frequency of this complication by 30-50%: these include orientation aids, avoidance of inappropriate drugs for elderly patients, adequate analgesia, early mobilization, short fasting times, and a perioperative nutrition plan. Preexisting cognitive impairment predisposes to postoperative delirium (odds ratios [OR] ranging from 2.5 to 4.5). Frailty is the most important predictor of the postoperative course (OR: 2.6-11). It follows that preoperative assessment of the patient's functional and cognitive status is essential. CONCLUZION The evidence-based and guideline-consistent care of elderly patients requires not only close interdisciplinary, interprofessional, and cross-sectoral collaboration, but also the restructuring and optimization of habitual procedural pathways in the hospital. Elderly patients' special needs can only be met by a treatment concept in which the entire perioperative phase is considered as a single, coherent process.
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Affiliation(s)
- Cynthia Olotu
- Department of Intensive Care Medicine, Center for Anesthesiology and Intensive Care Medicine, University Medical Center Hamburg-Eppendorf (UKE)
| | - Arved Weimann
- Department of General, Visceral and Oncological Surgery Klinikum St. Georg, Leipzig
| | - Christian Bahrs
- Clinic for Trauma and Reconstructive Surgery, BG Hospital, Tübingen
| | - Wolfgang Schwenk
- Department of General-, Visceral- and Vascular Surgery, Städtisches Klinikum Solingen gGmbH
| | - Martin Scherer
- Department of General Practice / Primary Care, Center for Psychosocial Medicine, University Medical Center Hamburg-Eppendorf (UKE)
| | - Rainer Kiefmann
- Department of Anesthesiology and Intensive Care Medicine, Rotkreuzklinikum München
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Kiefmann M, Tank S, Tritt MO, Keller P, Heckel K, Schulte-Uentrop L, Olotu C, Schrepfer S, Goetz AE, Kiefmann R. Dead space ventilation promotes alveolar hypocapnia reducing surfactant secretion by altering mitochondrial function. Thorax 2019; 74:219-228. [PMID: 30636196 DOI: 10.1136/thoraxjnl-2018-211864] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [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: 03/27/2018] [Revised: 08/29/2018] [Accepted: 09/10/2018] [Indexed: 11/03/2022]
Abstract
BACKGROUND In acute respiratory distress syndrome (ARDS), pulmonary perfusion failure increases physiologic dead space ventilation (VD/VT), leading to a decline of the alveolar CO2 concentration [CO2]iA. Although it has been shown that alveolar hypocapnia contributes to formation of atelectasis and surfactant depletion, a typical complication in ARDS, the underlying mechanism has not been elucidated so far. METHODS In isolated perfused rat lungs, cytosolic or mitochondrial Ca2+ concentrations ([Ca2+]cyt or [Ca2+]mito, respectively) of alveolar epithelial cells (AECs), surfactant secretion and the projected area of alveoli were quantified by real-time fluorescence or bright-field imaging (n=3-7 per group). In ventilated White New Zealand rabbits, the left pulmonary artery was ligated and the size of subpleural alveoli was measured by intravital microscopy (n=4 per group). Surfactant secretion was determined in the bronchoalveolar lavage (BAL) by western blot. RESULTS Low [CO2]iA decreased [Ca2+]cyt and increased [Ca2+]mito in AECs, leading to reduction of Ca2+-dependent surfactant secretion, and alveolar ventilation in situ. Mitochondrial inhibition by ruthenium red or rotenone blocked these responses indicating that mitochondria are key players in CO2 sensing. Furthermore, ligature of the pulmonary artery of rabbits decreased alveolar ventilation, surfactant secretion and lung compliance in vivo. Addition of 5% CO2 to the inspiratory gas inhibited these responses. CONCLUSIONS Accordingly, we provide evidence that alveolar hypocapnia leads to a Ca2+ shift from the cytosol into mitochondria. The subsequent decline of [Ca2+]cyt reduces surfactant secretion and thus regional ventilation in lung regions with high VD/VT. Additionally, the regional hypoventilation provoked by perfusion failure can be inhibited by inspiratory CO2 application.
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Affiliation(s)
- Martina Kiefmann
- Department of Anesthesiology, University Hospital Hamburg-Eppendorf, Hamburg, Germany
| | - Sascha Tank
- Department of Anesthesiology, University Hospital Hamburg-Eppendorf, Hamburg, Germany
| | - Marc-Oliver Tritt
- Department of Anesthesiology, University Hospital Hamburg-Eppendorf, Hamburg, Germany
| | - Paula Keller
- Department of Anesthesiology, University Hospital Hamburg-Eppendorf, Hamburg, Germany
| | - Kai Heckel
- Department of Anesthesiology, University Hospital Hamburg-Eppendorf, Hamburg, Germany
| | | | - Cynthia Olotu
- Department of Anesthesiology, University Hospital Hamburg-Eppendorf, Hamburg, Germany
| | - Sonja Schrepfer
- Division of Adult Cardiothoracic Surgery, University of California San Francisco, San Francisco, California, USA.,Department of Cardiac Surgery, University Hospital Hamburg-Eppendorf, Hamburg, Germany
| | - Alwin E Goetz
- Department of Anesthesiology, University Hospital Hamburg-Eppendorf, Hamburg, Germany
| | - Rainer Kiefmann
- Department of Anesthesiology, University Hospital Hamburg-Eppendorf, Hamburg, Germany
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Kowark A, Adam C, Ahrens J, Bajbouj M, Bollheimer C, Borowski M, Dodel R, Dolch M, Hachenberg T, Henzler D, Hildebrand F, Hilgers RD, Hoeft A, Isfort S, Kienbaum P, Knobe M, Knuefermann P, Kranke P, Laufenberg-Feldmann R, Nau C, Neuman MD, Olotu C, Rex C, Rossaint R, Sanders RD, Schmidt R, Schneider F, Siebert H, Skorning M, Spies C, Vicent O, Wappler F, Wirtz DC, Wittmann M, Zacharowski K, Zarbock A, Coburn M. Improve hip fracture outcome in the elderly patient (iHOPE): a study protocol for a pragmatic, multicentre randomised controlled trial to test the efficacy of spinal versus general anaesthesia. BMJ Open 2018; 8:e023609. [PMID: 30341135 PMCID: PMC6196806 DOI: 10.1136/bmjopen-2018-023609] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 07/24/2018] [Accepted: 09/12/2018] [Indexed: 02/06/2023] Open
Abstract
INTRODUCTION Hip fracture surgery is associated with high in-hospital and 30-day mortality rates and serious adverse patient outcomes. Evidence from randomised controlled trials regarding effectiveness of spinal versus general anaesthesia on patient-centred outcomes after hip fracture surgery is sparse. METHODS AND ANALYSIS The iHOPE study is a pragmatic national, multicentre, randomised controlled, open-label clinical trial with a two-arm parallel group design. In total, 1032 patients with hip fracture (>65 years) will be randomised in an intended 1:1 allocation ratio to receive spinal anaesthesia (n=516) or general anaesthesia (n=516). Outcome assessment will occur in a blinded manner after hospital discharge and inhospital. The primary endpoint will be assessed by telephone interview and comprises the time to the first occurring event of the binary composite outcome of all-cause mortality or new-onset serious cardiac and pulmonary complications within 30 postoperative days. In-hospital secondary endpoints, assessed via in-person interviews and medical record review, include mortality, perioperative adverse events, delirium, satisfaction, walking independently, length of hospital stay and discharge destination. Telephone interviews will be performed for long-term endpoints (all-cause mortality, independence in walking, chronic pain, ability to return home cognitive function and overall health and disability) at postoperative day 30±3, 180±45 and 365±60. ETHICS AND DISSEMINATION: iHOPE has been approved by the leading Ethics Committee of the Medical Faculty of the RWTH Aachen University on 14 March 2018 (EK 022/18). Approval from all other involved local Ethical Committees was subsequently requested and obtained. Study started in April 2018 with a total recruitment period of 24 months. iHOPE will be disseminated via presentations at national and international scientific meetings or conferences and publication in peer-reviewed international scientific journals. TRIAL REGISTRATION NUMBER DRKS00013644; Pre-results.
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Affiliation(s)
- Ana Kowark
- Department of Anaesthesiology, Medical Faculty RWTH Aachen University, Aachen, Germany
| | - Christian Adam
- Department of Anaesthesiology, Intensive Care and Pain Therapy, Klinikverbund St. Antonius und St. Josef GmbH, Wuppertal, Germany
| | - Jörg Ahrens
- Department of Anaesthesiology and Intensive Care, Medical University Hannover, Hannover, Germany
| | - Malek Bajbouj
- Psychiatry and Affective Neurosciences, Campus Benjamin Franklin, Charité Center Neurology, Neurosurgery and Psychiatry, Berlin, Germany
| | - Cornelius Bollheimer
- Department of Geriatric Medicine, Medical Faculty RWTH Aachen University, Aachen, Germany
| | - Matthias Borowski
- Institute of Biostatistics and Clinical Research, University of Muenster, Münster, Germany
| | - Richard Dodel
- Department of Geriatrics, University Hospital Essen, Essen, Germany
| | - Michael Dolch
- Department of Anaesthesiology, Ludwig-Maximilian University (LMU) Munich, Munich, Germany
| | - Thomas Hachenberg
- Department of Anaesthesiology and Intensive Care, University Hospital Magdeburg, Magdeburg, Germany
| | - Dietrich Henzler
- Department of Anaesthesiology, Surgical Intensive Care, Emergency and Pain Medicine, Ruhr-University Bochum, Klinikum Herford, Herford, Germany
| | - Frank Hildebrand
- Department of Orthopaedic Trauma Surgery, Medical Faculty RWTH Aachen University, Aachen, Germany
| | - Ralf-Dieter Hilgers
- Department of Medical Statistics, Medical Faculty RWTH Aachen University, Aachen, Germany
| | - Andreas Hoeft
- Department of Anaesthesiology and Operative Intensive Care Medicine, University Hospital Bonn, Bonn, Germany
| | - Susanne Isfort
- Center for Translational & Clinical Research Aachen (CTC-A), Medical Faculty RWTH Aachen University, Aachen, Germany
| | - Peter Kienbaum
- Department of Anaesthesiology, University Hospital Düsseldorf, Düsseldorf, Germany
| | - Mathias Knobe
- Department of Orthopaedic Trauma Surgery, Medical Faculty RWTH Aachen University, Aachen, Germany
| | - Pascal Knuefermann
- Department of Anaesthesiology, Gemeinschaftskrankenhaus Bonn, Bonn, Germany
| | - Peter Kranke
- Department of Anaesthesiology, University Hospital Würzburg, Würzburg, Germany
| | - Rita Laufenberg-Feldmann
- Department of Anaesthesiology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Carla Nau
- Department of Anaesthesiology and Intensive Care, University Hospital Schleswig-Holstein, Lübeck, Germany
| | - Mark D Neuman
- Department of Anaesthesiology and Critical Care, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Cynthia Olotu
- Department of the Geriatric Anaesthesiology, University Hospital Hamburg-Eppendorf, Hamburg, Germany
| | - Christopher Rex
- Department of Anaesthesiology and Intensive Care, Reutlingen Hospital GMBH, Reutlingen, Germany
| | - Rolf Rossaint
- Department of Anaesthesiology, Medical Faculty RWTH Aachen University, Aachen, Germany
| | - Robert D Sanders
- Department of Anesthesiology, University of Wisconsin – Madison, Madison, Wisconsin, USA
| | - Rene Schmidt
- Department of Psychiatry, Psychotherapy and Psychosomatics, Medical Faculty RWTH Aachen University, Stuttgart, Germany
| | - Frank Schneider
- Department of Psychiatry, Psychotherapy and Psychosomatics, Medical Faculty RWTH Aachen University, Aachen, Germany
- Institute for Neuroscience and Medicine (INM-10), Research Centre Jülich, Jülich, Germany
| | | | - Max Skorning
- Section Patient Safety, Medical Advisory Service of Social Health Insurance, Essen, Germany
| | - Claudia Spies
- Department of Anaesthesiology, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Oliver Vicent
- Department of Anaesthesiology and Intensive Care, University Hospital Dresden, Dresden, Germany
| | - Frank Wappler
- Department of Anaesthesiology and Operative Intensive Care, University Witten/Herdecke, Witten/Herdecke, Germany
| | | | - Maria Wittmann
- Department of Anaesthesiology and Operative Intensive Care Medicine, University Hospital Bonn, Bonn, Germany
| | - Kai Zacharowski
- Department of Anaesthesiology, Intensive Care and Pain Therapy, University Hospital Frankfurt, Frankfurt, Germany
| | - Alexander Zarbock
- Department of Anaesthesiology, Intensive Care and Pain Therapy, University Hospital Muenster, Muenster, Germany
| | - Mark Coburn
- Department of Anaesthesiology, Medical Faculty RWTH Aachen University, Aachen, Germany
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Olotu C, Nitzschke R, Kiefmann R, Goetz AE. [When the resting membrane potential becomes restless. Acute hyperkalemia in the perioperative phase]. Anaesthesist 2012; 61:821-31; quiz 832-3. [PMID: 22968394 DOI: 10.1007/s00101-012-2078-1] [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: 10/27/2022]
Abstract
Acute hyperkalemia is a life-threatening event and often occurs abruptly and without warning in the perioperative field. Risk factors are found on multiple levels as they can derive from a patients pre-existing condition or result from the surgical intervention or management of anesthesia. The therapy of hyperkalemia depends on the dimensions of electrolyte disturbance and a distinction can be made between therapeutic measures with a rapid and those with a long-term effect.
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Affiliation(s)
- C Olotu
- Zentrum für Anästhesiologie und Intensivmedizin, Klinik und Poliklinik für Anästhesiologie, Universitätsklinikum Hamburg-Eppendorf, Martinistr. 52, 20247 Hamburg, Deutschland.
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14
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Schildgen O, Sirma H, Funk A, Olotu C, Wend UC, Hartmann H, Helm M, Rockstroh JK, Willems WR, Will H, Gerlich WH. Variant of hepatitis B virus with primary resistance to adefovir. N Engl J Med 2006; 354:1807-12. [PMID: 16641397 DOI: 10.1056/nejmoa051214] [Citation(s) in RCA: 182] [Impact Index Per Article: 10.1] [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: 12/14/2022]
Abstract
The reverse-transcriptase inhibitor lamivudine (Zeffix, GlaxoSmithKline) is often used to treat chronic infection with hepatitis B virus (HBV) until resistance develops. Treatment may then be switched to the reverse-transcriptase inhibitor adefovir (Hepsera, Gilead), which has a lower frequency of resistance. Here, we describe three cases of primary adefovir resistance that were sensitive to tenofovir (Viread, Gilead). All three cases involved a rare HBV variant with a valine at position 233 of the reverse-transcriptase domain instead of isoleucine (rtI233V), as in the wild-type virus. This HBV variant also displayed resistance to adefovir and sensitivity to tenofovir in vitro.
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Affiliation(s)
- Oliver Schildgen
- Institute of Medical Microbiology and Immunology and the Department of Medicine I, University of Bonn, Bonn, Germany
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15
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Schildgen O, Sirma H, Funk A, Wend U, Hartmann H, Olotu C, Helm M, Rockstroh J, Willems W, Will H, Gerlich W. P.099 Primary resistance of a novel hepatitis B virus variant to adefovir. J Clin Virol 2006. [DOI: 10.1016/s1386-6532(06)80281-7] [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: 10/24/2022]
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