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Tang NC, Su JC, Shmidov Y, Kelly G, Deshpande S, Sirohi P, Peterson N, Chilkoti A. Synthetic intrinsically disordered protein fusion tags that enhance protein solubility. Nat Commun 2024; 15:3727. [PMID: 38697982 PMCID: PMC11066018 DOI: 10.1038/s41467-024-47519-7] [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] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Accepted: 04/03/2024] [Indexed: 05/05/2024] Open
Abstract
We report the de novo design of small (<20 kDa) and highly soluble synthetic intrinsically disordered proteins (SynIDPs) that confer solubility to a fusion partner with minimal effect on the activity of the fused protein. To identify highly soluble SynIDPs, we create a pooled gene-library utilizing a one-pot gene synthesis technology to create a large library of repetitive genes that encode SynIDPs. We identify three small (<20 kDa) and highly soluble SynIDPs from this gene library that lack secondary structure and have high solvation. Recombinant fusion of these SynIDPs to three known inclusion body forming proteins rescue their soluble expression and do not impede the activity of the fusion partner, thereby eliminating the need for removal of the SynIDP tag. These findings highlight the utility of SynIDPs as solubility tags, as they promote the soluble expression of proteins in E. coli and are small, unstructured proteins that minimally interfere with the biological activity of the fused protein.
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Affiliation(s)
- Nicholas C Tang
- Department of Biomedical Engineering, Duke University, Durham, NC, 27708, USA
| | - Jonathan C Su
- Department of Biomedical Engineering, Duke University, Durham, NC, 27708, USA
| | - Yulia Shmidov
- Department of Biomedical Engineering, Duke University, Durham, NC, 27708, USA
| | - Garrett Kelly
- Department of Biomedical Engineering, Duke University, Durham, NC, 27708, USA
| | - Sonal Deshpande
- Department of Biomedical Engineering, Duke University, Durham, NC, 27708, USA
| | - Parul Sirohi
- Department of Biomedical Engineering, Duke University, Durham, NC, 27708, USA
| | - Nikhil Peterson
- Department of Biomedical Engineering, Duke University, Durham, NC, 27708, USA
| | - Ashutosh Chilkoti
- Department of Biomedical Engineering, Duke University, Durham, NC, 27708, USA.
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Dai Y, Farag M, Lee D, Zeng X, Kim K, Son HI, Guo X, Su J, Peterson N, Mohammed J, Ney M, Shapiro DM, Pappu RV, Chilkoti A, You L. Programmable synthetic biomolecular condensates for cellular control. Nat Chem Biol 2023; 19:518-528. [PMID: 36747054 PMCID: PMC10786170 DOI: 10.1038/s41589-022-01252-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 19.0] [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] [Received: 05/14/2022] [Accepted: 12/21/2022] [Indexed: 02/08/2023]
Abstract
The formation of biomolecular condensates mediated by a coupling of associative and segregative phase transitions plays a critical role in controlling diverse cellular functions in nature. This has inspired the use of phase transitions to design synthetic systems. While design rules of phase transitions have been established for many synthetic intrinsically disordered proteins, most efforts have focused on investigating their phase behaviors in a test tube. Here, we present a rational engineering approach to program the formation and physical properties of synthetic condensates to achieve intended cellular functions. We demonstrate this approach through targeted plasmid sequestration and transcription regulation in bacteria and modulation of a protein circuit in mammalian cells. Our approach lays the foundation for engineering designer condensates for synthetic biology applications.
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Affiliation(s)
- Yifan Dai
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC, USA
- Duke Center for Quantitative Biodesign, Duke University, Durham, NC, USA
| | - Mina Farag
- Department of Biomedical Engineering, Center for Biomolecular Condensates (CBC), James McKelvey School of Engineering, Washington University in St. Louis, St. Louis, MO, USA
| | - Dongheon Lee
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC, USA
| | - Xiangze Zeng
- Department of Biomedical Engineering, Center for Biomolecular Condensates (CBC), James McKelvey School of Engineering, Washington University in St. Louis, St. Louis, MO, USA
| | - Kyeri Kim
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC, USA
| | - Hye-In Son
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC, USA
| | - Xiao Guo
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC, USA
| | - Jonathan Su
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC, USA
| | - Nikhil Peterson
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC, USA
| | - Javid Mohammed
- Department of Immunology, Duke University, Durham, NC, USA
| | - Max Ney
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC, USA
| | - Daniel Mark Shapiro
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC, USA
| | - Rohit V Pappu
- Department of Biomedical Engineering, Center for Biomolecular Condensates (CBC), James McKelvey School of Engineering, Washington University in St. Louis, St. Louis, MO, USA
| | - Ashutosh Chilkoti
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC, USA.
- Duke Center for Quantitative Biodesign, Duke University, Durham, NC, USA.
| | - Lingchong You
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC, USA.
- Duke Center for Quantitative Biodesign, Duke University, Durham, NC, USA.
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Gadiraju N, Peterson N, Shah J, Chu A, Larbie MA, Bu A, Saterbak A. Design and Development of a Novel System for Remote Control of Stationary Oxygen Concentrator Flow Rate. Med Devices (Auckl) 2023; 16:91-100. [PMID: 37096243 PMCID: PMC10122499 DOI: 10.2147/mder.s407233] [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] [Received: 02/20/2023] [Accepted: 04/05/2023] [Indexed: 04/26/2023] Open
Abstract
Purpose Long-term oxygen therapy involves utilizing stationary oxygen concentrators to allow patients with respiratory illnesses to attain sufficient blood oxygenation via supplemental oxygen. Disadvantages of these devices include their lack of remote adjustability and domiciliary accessibility. To adjust oxygen flow, patients typically walk across their homes - a physically taxing activity - to manually rotate the knob of the concentrator flowmeter. The purpose of this investigation was to develop a control system device that allows patients to remotely adjust the oxygen flow rates on their stationary oxygen concentrator. Methods The engineering design process was used to develop the novel FLO2 device. The two-part system is composed of 1) a smartphone application and 2) an adjustable concentrator attachment unit that mechanically interfaces with the stationary oxygen concentrator flowmeter. Results Product testing indicates that users successfully communicated to the concentrator attachment from a maximum distance of 41m in an open field, suggesting usability from anywhere inside a standard home. The calibration algorithm adjusted oxygen flow rates with an accuracy of ±0.019 LPM and a precision of ±0.042 LPM. Conclusion Initial design testing suggests the device as a reliable and accurate method of wirelessly adjusting oxygen flow on a stationary oxygen concentrator, but further testing should be performed on different stationary oxygen concentrator models.
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Affiliation(s)
- Nikhil Gadiraju
- Pratt School of Engineering, Duke University, Durham, NC, USA
| | - Nikhil Peterson
- Pratt School of Engineering, Duke University, Durham, NC, USA
| | - Jessica Shah
- Pratt School of Engineering, Duke University, Durham, NC, USA
| | - Annabelle Chu
- Pratt School of Engineering, Duke University, Durham, NC, USA
| | | | - Amy Bu
- Pratt School of Engineering, Duke University, Durham, NC, USA
| | - Ann Saterbak
- Pratt School of Engineering, Duke University, Durham, NC, USA
- Correspondence: Ann Saterbak, Department of Biomedical Engineering, Duke University, 101 Science Drive, Campus Box 90281, Durham, NC, 27708-0281, USA, Tel +1 919 660 5899, Fax +1 919 684 4488, Email
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Abstract
Aims The aim of this study was to describe temporal trends and survivorship of total hip arthroplasty (THA) in very young patients, aged ≤ 20 years. Patients and Methods A descriptive observational study was undertaken using data from the National Joint Registry (NJR) for England, Wales, Northern Ireland and the Isle of Man between April 2003 and March 2017. All patients aged ≤ 20 years at the time of THA were included and the primary outcome was revision surgery. Descriptive statistics were used to summarize the data and Kaplan–Meier estimates calculated for the cumulative implant survival. Results A total of 769 THAs were performed in 703 patients. The median follow-up was 5.1 years (interquartile range (IQR) 2.6 to 7.8). Eight patients died and 35 THAs were revised. The use of metal-on-metal (MoM) bearings and resurfacing procedures declined after 2008. The most frequently recorded indications for revision were loosening (20%) and infection (20%), although the absolute risk of these events occurring was low (0.9%). Factors associated with lower implant survival were MoM and metal-on-polyethylene (MoP) bearings and resurfacing arthroplasty ( vs ceramic-on-polyethylene (CoP) and ceramic-on-ceramic (CoC) bearings, p = 0.002), and operations performed by surgeons who undertook few THAs in this age group as recorded in the NJR ( vs those with five or more recorded operations, p = 0.030). Kaplan–Meier estimates showed 96% (95% confidence interval (CI) 94% to 98%) survivorship of implants at five years. Conclusion Within the NJR, the overall survival for very young patients undergoing THA exceeded 96% during the first five postoperative years. In the absence of studies that can better account for differences in the characteristics of the patients, surgeons should consider the association between early revision and the type of implant, the number of THAs performed in these patients, and the bearing surface when performing THA in very young patients. Cite this article: Bone Joint J 2018;100-B:1320–9.
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Affiliation(s)
- D. Metcalfe
- Associate Professor of Orthopaedic and Trauma Surgery Oxford Trauma, NuffieldDepartment of Orthopaedics, Rheumatology and Musculoskeletal Sciences (NDORMS), University of Oxford, Oxford, UK and Consultant Orthopaedic Surgeon, Alder Hey Children’s Hospital, Liverpool, UK
| | - N. Peterson
- Specialty Registrar in Trauma & Orthopaedic Surgery, Alder Hey Children’s Hospital, Liverpool, UK
| | - J. M. Wilkinson
- Department of Oncology and Metabolism, University of Sheffield, Sorby Wing, Northern General Hospital, Sheffield, UK
| | - D. C. Perry
- Associate Professor of Orthopaedic and Trauma Surgery Oxford Trauma, NuffieldDepartment of Orthopaedics, Rheumatology and Musculoskeletal Sciences (NDORMS), University of Oxford, Oxford, UK and Consultant Orthopaedic Surgeon, Alder Hey Children’s Hospital, Liverpool, UK
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Steffel J, Ruff C, Braunwald E, Hamershock R, Murphy S, Nieminen M, Lanz H, Mercury M, Peterson N, Antman E, Giugliano R. P4808Edoxaban and implantable cardiac device interventions - Insights from the ENGAGE AF-TIMI 48 trial. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p4808] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- J Steffel
- Department of Cardiology, University of Zurich, Zurich, Switzerland
| | - C Ruff
- Brigham and Women's Hospital, Boston, United States of America
| | - E Braunwald
- Brigham and Women's Hospital, Boston, United States of America
| | - R Hamershock
- Brigham and Women's Hospital, Boston, United States of America
| | - S Murphy
- Brigham and Women's Hospital, Boston, United States of America
| | - M Nieminen
- Helsinki University Central Hospital, Helsinki, Finland
| | - H Lanz
- Daiichi-Sankyo Europe, Munich, Germany
| | - M Mercury
- Daiichi-Sankyo Pharma Development, Edison, United States of America
| | - N Peterson
- Daiichi-Sankyo Pharma Development, Edison, United States of America
| | - E Antman
- Brigham and Women's Hospital, Boston, United States of America
| | - R Giugliano
- Brigham and Women's Hospital, Boston, United States of America
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Bibeau C, Bayramian AJ, Armstrong P, Beach RJ, Campbell R, Ebbers CA, Freitas BL, Ladran T, Menapace J, Payne SA, Peterson N, Schaffers KI, Stolz C, Telford S, Tassano JB, Utterback E. Full System Operations of Mercury: A Diode Pumped Solid-State Laser. Fusion Science and Technology 2017. [DOI: 10.13182/fst05-a748] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- C. Bibeau
- Lawrence Livermore National Laboratory, 7000 East Ave., L-482, Livermore, CA 94550-9234 USA Phone: (925)424-3802, FAX: (925)423-6195
| | - A. J. Bayramian
- Lawrence Livermore National Laboratory, 7000 East Ave., L-482, Livermore, CA 94550-9234 USA Phone: (925)424-3802, FAX: (925)423-6195
| | - P. Armstrong
- Lawrence Livermore National Laboratory, 7000 East Ave., L-482, Livermore, CA 94550-9234 USA Phone: (925)424-3802, FAX: (925)423-6195
| | - R. J. Beach
- Lawrence Livermore National Laboratory, 7000 East Ave., L-482, Livermore, CA 94550-9234 USA Phone: (925)424-3802, FAX: (925)423-6195
| | - R. Campbell
- Lawrence Livermore National Laboratory, 7000 East Ave., L-482, Livermore, CA 94550-9234 USA Phone: (925)424-3802, FAX: (925)423-6195
| | - C. A. Ebbers
- Lawrence Livermore National Laboratory, 7000 East Ave., L-482, Livermore, CA 94550-9234 USA Phone: (925)424-3802, FAX: (925)423-6195
| | - B. L. Freitas
- Lawrence Livermore National Laboratory, 7000 East Ave., L-482, Livermore, CA 94550-9234 USA Phone: (925)424-3802, FAX: (925)423-6195
| | - T. Ladran
- Lawrence Livermore National Laboratory, 7000 East Ave., L-482, Livermore, CA 94550-9234 USA Phone: (925)424-3802, FAX: (925)423-6195
| | - J. Menapace
- Lawrence Livermore National Laboratory, 7000 East Ave., L-482, Livermore, CA 94550-9234 USA Phone: (925)424-3802, FAX: (925)423-6195
| | - S. A. Payne
- Lawrence Livermore National Laboratory, 7000 East Ave., L-482, Livermore, CA 94550-9234 USA Phone: (925)424-3802, FAX: (925)423-6195
| | - N. Peterson
- Lawrence Livermore National Laboratory, 7000 East Ave., L-482, Livermore, CA 94550-9234 USA Phone: (925)424-3802, FAX: (925)423-6195
| | - K. I. Schaffers
- Lawrence Livermore National Laboratory, 7000 East Ave., L-482, Livermore, CA 94550-9234 USA Phone: (925)424-3802, FAX: (925)423-6195
| | - C. Stolz
- Lawrence Livermore National Laboratory, 7000 East Ave., L-482, Livermore, CA 94550-9234 USA Phone: (925)424-3802, FAX: (925)423-6195
| | - S. Telford
- Lawrence Livermore National Laboratory, 7000 East Ave., L-482, Livermore, CA 94550-9234 USA Phone: (925)424-3802, FAX: (925)423-6195
| | - J. B. Tassano
- Lawrence Livermore National Laboratory, 7000 East Ave., L-482, Livermore, CA 94550-9234 USA Phone: (925)424-3802, FAX: (925)423-6195
| | - E. Utterback
- Lawrence Livermore National Laboratory, 7000 East Ave., L-482, Livermore, CA 94550-9234 USA Phone: (925)424-3802, FAX: (925)423-6195
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Bayramian A, Armstrong P, Ault E, Beach R, Bibeau C, Caird J, Campbell R, Chai B, Dawson J, Ebbers C, Erlandson A, Fei Y, Freitas B, Kent R, Liao Z, Ladran T, Menapace J, Molander B, Payne S, Peterson N, Randles M, Schaffers K, Sutton S, Tassano J, Telford S, Utterback E. The Mercury Project: A High Average Power, Gas-Cooled Laser for Inertial Fusion Energy Development. Fusion Science and Technology 2017. [DOI: 10.13182/fst07-a1517] [Citation(s) in RCA: 88] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- A. Bayramian
- Lawrence Livermore National Laboratory, 7000 East Ave., L-470, Livermore, CA 94551
| | - P. Armstrong
- Lawrence Livermore National Laboratory, 7000 East Ave., L-470, Livermore, CA 94551
| | - E. Ault
- Lawrence Livermore National Laboratory, 7000 East Ave., L-470, Livermore, CA 94551
| | - R. Beach
- Lawrence Livermore National Laboratory, 7000 East Ave., L-470, Livermore, CA 94551
| | - C. Bibeau
- Lawrence Livermore National Laboratory, 7000 East Ave., L-470, Livermore, CA 94551
| | - J. Caird
- Lawrence Livermore National Laboratory, 7000 East Ave., L-470, Livermore, CA 94551
| | - R. Campbell
- Lawrence Livermore National Laboratory, 7000 East Ave., L-470, Livermore, CA 94551
| | - B. Chai
- Crystal Photonics, Inc 5525 Sanford Lane, Sanford, Fl 32773
| | - J. Dawson
- Lawrence Livermore National Laboratory, 7000 East Ave., L-470, Livermore, CA 94551
| | - C. Ebbers
- Lawrence Livermore National Laboratory, 7000 East Ave., L-470, Livermore, CA 94551
| | - A. Erlandson
- Lawrence Livermore National Laboratory, 7000 East Ave., L-470, Livermore, CA 94551
| | - Y. Fei
- Crystal Photonics, Inc 5525 Sanford Lane, Sanford, Fl 32773
| | - B. Freitas
- Lawrence Livermore National Laboratory, 7000 East Ave., L-470, Livermore, CA 94551
| | - R. Kent
- Lawrence Livermore National Laboratory, 7000 East Ave., L-470, Livermore, CA 94551
| | - Z. Liao
- Lawrence Livermore National Laboratory, 7000 East Ave., L-470, Livermore, CA 94551
| | - T. Ladran
- Lawrence Livermore National Laboratory, 7000 East Ave., L-470, Livermore, CA 94551
| | - J. Menapace
- Lawrence Livermore National Laboratory, 7000 East Ave., L-470, Livermore, CA 94551
| | - B. Molander
- Lawrence Livermore National Laboratory, 7000 East Ave., L-470, Livermore, CA 94551
| | - S. Payne
- Lawrence Livermore National Laboratory, 7000 East Ave., L-470, Livermore, CA 94551
| | - N. Peterson
- Lawrence Livermore National Laboratory, 7000 East Ave., L-470, Livermore, CA 94551
| | - M. Randles
- Northrop Grumman Space Technologies, Synoptics, 1201 Continental Blvd., Charlotte, NC 28273
| | - K. Schaffers
- Lawrence Livermore National Laboratory, 7000 East Ave., L-470, Livermore, CA 94551
| | - S. Sutton
- Lawrence Livermore National Laboratory, 7000 East Ave., L-470, Livermore, CA 94551
| | - J. Tassano
- Lawrence Livermore National Laboratory, 7000 East Ave., L-470, Livermore, CA 94551
| | - S. Telford
- Lawrence Livermore National Laboratory, 7000 East Ave., L-470, Livermore, CA 94551
| | - E. Utterback
- Lawrence Livermore National Laboratory, 7000 East Ave., L-470, Livermore, CA 94551
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Rubenchik A, Wu S, Mitchell S, Golosker I, LeBlanc M, Peterson N. Direct measurements of temperature-dependent laser absorptivity of metal powders. Appl Opt 2015; 54:7230-7233. [PMID: 26368757 DOI: 10.1364/ao.54.007230] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A compact system is developed to measure laser absorptivity for a variety of powder materials (metals, ceramics, etc.) with different powder size distributions and thicknesses. The measured results for several metal powders are presented. The results are consistent with those from ray tracing calculations.
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Affiliation(s)
- N Ahmad
- Liverpool Vascular and Endovascular Service, Royal Liverpool University Hospital, Liverpool, UK
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Peterson N, Stevenson H, Sahni V. Size matters: how accurate is clinical estimation of traumatic wound size? Injury 2014; 45:232-6. [PMID: 22592151 DOI: 10.1016/j.injury.2012.04.018] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2012] [Revised: 04/17/2012] [Accepted: 04/17/2012] [Indexed: 02/02/2023]
Abstract
AIMS The presentation of traumatic wounds is commonplace in the accident & emergency department. Often, these wounds need referral to specialist care, e.g. trauma & orthopaedic, plastic or maxillofacial surgeons. Documentation and communication of the size of the wound can influence management, e.g. Gustilo & Anderson classification of open fractures. Several papers acknowledge the variability in measurement of chronic wounds, but there is no data regarding accuracy of traumatic wound assessment. The authors hypothesised that the estimation of wound size and subsequent communication or documentation was often inaccurate, with high inter-observer variability. A study was designed to assess this hypothesis. METHODS A total of 7 scaled images of wounds related to trauma were obtained from an Internet search engine. The questionnaire asked 3 questions regarding mechanism of injury, relevant anatomy and proposed treatment, to simulate real patient assessment. One further question addressed the estimation of wound size. 50 doctors of varying experience across several specialities were surveyed. The images were analysed after data collection had finished to provide appropriate measurements, and compared to the questionnaire results by a researcher blinded to the demographics of the individual. RESULTS Our results show that there is a high inter-observer variability and inaccuracy in the estimation of wound size. This inaccuracy was directional and affected by gender. Male doctors were more likely to overestimate the size of wounds, whilst their female colleagues were more likely to underestimate size. CONCLUSIONS The estimation of wound size is a common requirement of clinical practice, and inaccurate interpretation of size may influence surgical management. Assessment using estimation was inaccurate, with high inter-observer variability. Assessment of traumatic wounds that require surgical management should be accurately measured, possibly using photography and ruler measurement.
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Affiliation(s)
- N Peterson
- Mersey Deanery, Core Surgical Trainee, Lead Employer, Warrington Road, Prescot, Merseyside, L35 5DR, United Kingdom.
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Tang YMJ, Southern SJ, Peterson N, Stevenson HL, Trail IA. Re: Stevenson et al. An objective assessment of safety to drive in an upper limb cast. J Hand Surg Eur. 2013, 38: 321-4. J Hand Surg Eur Vol 2013; 38:908. [PMID: 24065745 DOI: 10.1177/1753193413499707] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Y-M J Tang
- Department of Plastic Surgery, Pinderfields General Hospital, Wakefield, UK.
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Abstract
Patients managed with upper limb cast immobilization often seek advice about driving. There is very little published data to assist in decision making, and advice given varies between healthcare professionals. There are no specific guidelines available from the UK Drivers and Vehicles Licensing Agency, police, or insurance companies. Evidence-based guidelines would enable clinicians to standardize the advice given to patients. Six individuals (three male, three female; mean age 36 years, range 27-43 years) were assessed by a mobility occupational therapist and driving standards agency examiner while completing a formal driving test in six different types of upper limb casts (above-elbow, below-elbow neutral, and below-elbow cast incorporating the thumb [Bennett's cast]) on both left and right sides. Of the 36 tests, participants passed 31 tests, suggesting that most people were able to safely drive with upper limb cast immobilization. However, driving in a left above-elbow cast was considered unsafe.
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Moore D, Leach D, Bickett-Weddle D, Andersen K, Castillo A, Collar C, Higginbotham G, Peterson N, Reed B, Hartman M. Evaluation of a biological risk management tool on large western United States dairies. J Dairy Sci 2010; 93:4096-104. [DOI: 10.3168/jds.2010-3272] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2010] [Accepted: 05/22/2010] [Indexed: 11/19/2022]
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15
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Frenkel M, Peterson N, Swint K, Cohen L. Integrative medicine consultation with cancer patients: Does it affect patients concerns and well-being? J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.e20581] [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: 11/20/2022] Open
Abstract
e20581 Background: Increased numbers of cancer patients are searching for additional options outside of their conventional medical care to improve their clinical outcome, quality of life, and overall wellbeing. Complementary and integrative medicine (CIM)) is one of the main options that patients are incorporating. The objectives of this study were to assess the outcome and value of an integrative medicine clinical consultation. Methods: Patients attending academic integrative medicine clinic evaluated their concerns and wellbeing using the Measure Yourself Concerns and Wellbeing (MYCaW) scale, a validated tool assessing outcome of complementary consultation for cancer patients. Prior to each visit patients completed the MYCaW and listed their two main concerns, the severity of the concern (0 = does not bother me at all to 6 = bothers me greatly), and their wellbeing (0 = as good as can be to 6 = as bad as can be). All patients met with a physician who provided an integrative consultation that included discussion of nutrition, supplements, exercise, useful complementary therapies, and the mind-body-spirit connection. At the follow up visit (usually 2–3 months later) patients completed the MYCaW to evaluate if the initial concerns were met. Results: Oncologists in the cancer center referred 197 patients for consultation about the integration of complementary medicine to their care. The majority of the participants were female (n=121), mean age was 56, range 21–90. Patients had been using a large range of CIM therapies including nutritional supplements (n=144), dietary changes (n=36), and acupuncture (n=33). The leading diagnosis was breast cancer followed by prostate cancer, but all major cancer diagnoses were represented. The leading concerns were related to “What else can I do?” and “How can I better cope?” From pre to post there was a reduction in severity of the concerns scores in 79% of patients, no change for 8%, and an increase for 13% (mean pre = 4.6; mean post = 2.6). For the question of Well being there was a reduction for 49%, no change for 32%, and an increase for 18% of the patients (mean pre = 2.5; mean post = 1.82). Conclusions: Integrative medicine consultations for cancer patients appear to be a valuable service that addresses patients’ main concerns and improves well being. No significant financial relationships to disclose.
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Affiliation(s)
- M. Frenkel
- University of Texas M. D. Anderson Cancer Center, Houston, TX
| | - N. Peterson
- University of Texas M. D. Anderson Cancer Center, Houston, TX
| | - K. Swint
- University of Texas M. D. Anderson Cancer Center, Houston, TX
| | - L. Cohen
- University of Texas M. D. Anderson Cancer Center, Houston, TX
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Peterson N. Apparatus for mass vaccination against smallpox. Acta Med Scand Suppl 2009; 464:43-4. [PMID: 5228764 DOI: 10.1111/j.0954-6820.1966.tb05071.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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17
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Peterson N, Guthery S, Denson L, Lee J, Saeed S, Prahalad S, Biank V, Ehlert R, Tomer G, Grand R, Rudolph C, Kugathasan S. Genetic variants in the autophagy pathway contribute to paediatric Crohn's disease. Gut 2008; 57:1336-7; author reply 1337. [PMID: 18719149 DOI: 10.1136/gut.2008.152207] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/08/2022]
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18
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Bibeau C, Bayramian A, Armstrong P, Ault E, Beach R, Benapfl M, Campbell R, Dawson J, Ebbers C, Freitas B, Kent R, Liao Z, Ladran T, Menapace J, Molander B, Moses E, Oberhelman S, Payne S, Peterson N, Schaffers K, Stolz C, Sutton S, Tassano J, Telford S, Utterback E, Randles M, Chai B, Fei Y. The mercury laser system – An average power, gas-cooled, Yb:S-FAP based system with frequency conversion and wavefront correction. ACTA ACUST UNITED AC 2006. [DOI: 10.1051/jp4:2006133161] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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19
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Schiff WB, Holtz KD, Peterson N, Rakusan T. Effect of an intervention to reduce procedural pain and distress for children with HIV infection. J Pediatr Psychol 2001; 26:417-27. [PMID: 11553696 DOI: 10.1093/jpepsy/26.7.417] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [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: 11/13/2022] Open
Abstract
OBJECTIVE To evaluate a multicomponent pain management intervention, including cognitive behavioral strategies, for children with human immunodeficiency virus (HIV) infection undergoing routine venipuncture. METHODS Following a baseline venipuncture, children were exposed to an intervention including preparation, relaxation, distraction, reinforcement, parent involvement, and EMLA (eutectic mixture of local anesthetics) cream, and followed for three additional venipuncture procedures. After each procedure, child distress was rated on the Procedure Behavior Checklist (PBCL), child self-report of pain was obtained using the FACES scale, and parent anxiety was reported on the State Trait Anxiety Inventory-State Scale (STAI). RESULTS Significant reductions in child distress and pain were found by the second postintervention procedure and maintained at the third. Parent anxiety was significantly reduced by the second postintervention procedure, but many parents chose not to participate in the third postintervention procedure. CONCLUSIONS With repeated exposure, a multicomponent pain management intervention, including cognitive behavioral strategies and EMLA, appears effective at reducing pain, distress, and parent anxiety for children with HIV.
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Affiliation(s)
- W B Schiff
- The American School of Professional Psychology, Virginia Campus, Arlington 22209, USA.
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20
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Lee DH, Bardossy L, Peterson N, Blajchman MA. o-raffinose cross-linked hemoglobin improves the hemostatic defect associated with anemia and thrombocytopenia in rabbits. Blood 2000; 96:3630-6. [PMID: 11071664] [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: 02/18/2023] Open
Abstract
Several different preparations of cross-linked hemoglobin (CLHb) are being evaluated for their efficacy and safety as red cell substitutes in a variety of preclinical and clinical settings. Because CLHb is known to sequester nitric oxide (NO) and inhibit NO-mediated processes, we hypothesized that CLHb would have a hemostatic effect by enhancing platelet reactivity, inducing vasoconstriction, or both. Infusion of o-raffinose CLHb shortened the prolonged microvascular bleeding time and decreased blood loss from ear incisions in rabbits rendered anemic and thrombocytopenic. Moreover, this hemostatic effect persisted for at least 24 hours after infusion. Phenylephrine induced a degree of vasoconstriction similar to that induced by CLHb but did not shorten the bleeding time or decrease blood loss, suggesting that vasoconstriction alone cannot account for the hemostatic effect of CLHb. There was no evidence of CLHb-induced activation of coagulation in vivo, since infusion of CLHb did not increase circulating levels of thrombin-antithrombin complex. In vitro, CLHb abolished the inhibitory effect of the NO donor 3-morpholinosydnonimine on platelet aggregation and enhanced the aggregation of stimulated but not resting platelets. This potentiating effect was not attenuated by the addition of superoxide dismutase or catalase. To evaluate the potential arterial thrombogenicity of CLHb, a model of carotid artery thrombosis was developed in rabbits without thrombocytopenia or anemia. Compared with albumin infusion, CLHb infusion shortened the time to complete carotid occlusion. These data suggest that CLHb may shift the thromboregulatory balance toward clot formation, resulting in decreased bleeding in anemic and thrombocytopenic rabbits and possibly increasing arterial thrombogenicity in normal rabbits.
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Affiliation(s)
- D H Lee
- Departments of Medicine and Pathology, Queen's University, Kingston, Ontario, Canada.
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21
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Nesbit MJ, Hill M, Peterson N. A comprehensive pediatric bereavement program: the patterns of your life. Crit Care Nurs Q 1997; 20:48-62. [PMID: 9313427] [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: 02/05/2023]
Abstract
The death of a child is one of the most painful experiences a parent can endure. Communicating and meeting the needs of parents during this time of crisis is a challenge for nurses. Pediatric intensive care unit and emergency department nurses who may feel overwhelmed and inadequate when working with grieving families, especially with a sudden and unexpected death, are assisted by "The Patterns of Your Life: A Comprehensive Pediatric Bereavement Program." The program is a blending of critical pathways (an element of managed care), educational resources, and family follow-up for 1 year. Preliminary evaluations indicate that the comprehensive bereavement program appears to have many benefits for families and health care staff alike.
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Affiliation(s)
- M J Nesbit
- Pediatric Intensive Care Unit, University of Wisconsin Children's Hospital, Madison, USA
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22
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Lescar J, Pellegrini M, Souchon H, Tello D, Poljak RJ, Peterson N, Greene M, Alzari PM. Crystal structure of a cross-reaction complex between Fab F9.13.7 and guinea fowl lysozyme. J Biol Chem 1995; 270:18067-76. [PMID: 7629116 DOI: 10.1074/jbc.270.30.18067] [Citation(s) in RCA: 72] [Impact Index Per Article: 2.5] [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: 01/26/2023] Open
Abstract
The crystal structure of the complex between the cross-reacting antigen Guinea fowl lysozyme and the Fab from monoclonal antibody F9.13.7, raised against hen egg lysozyme, has been determined by x-ray diffraction to 3-A resolution. The antibody interacts with exposed residues of an alpha-helix and surrounding loops adjacent to the lysozyme active site cleft. The epitope of lysozyme bound by antibody F9.13.7 overlaps almost completely with that bound by antibody HyHEL10; the same 12 residues of the antigen interact with the two antibodies. The antibodies, however, have different combining sites with no sequence homology at any of their complementarity-determining regions and show a dissimilar pattern of cross-reactivity with heterologous antigens. Side chain mobility of epitope residues contributes to confer steric and electrostatic complementarity to differently shaped combining sites, allowing functional mimicry to occur. The capacity of two antibodies that have different fine specificities to bind the same area of the antigen emphasizes the operational character of the definition of an antigenic determinant. This example demonstrates that degenerate binding of the same structural motif does not require the existence of sequence homology or other chemical similarities between the different binding sites.
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Affiliation(s)
- J Lescar
- Unité d'Immunologie Structurale, Institut Pasteur, Paris, France
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23
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Abstract
We investigated whether greater than or equal to 0.6 minimum alveolar concentration (MAC) of isoflurane suppresses learning of information presented verbally. Preoperatively, we asked 45 healthy patients (aged 23-58 yr) undergoing elective surgery 15 general knowledge questions designed to arouse their curiosity. They were told that they would be given the answers during anesthesia. Anesthesia was induced with isoflurane and nitrous oxide (25 subjects also received 1.1 +/- 0.6 mg/kg of propofol). The trachea was intubated with the aid of vecuronium (0.07 mg/kg IV). Isoflurane in oxygen was given to provide 0.6 MAC before and 1.0 and 1.4 MAC during surgery. After 10 min at each of two of the three MAC levels, the answers were given to five of the questions. At the remaining concentration, patients received a message to either touch an ear (n = 30) or keep their arms still (n = 15) during the postoperative interview. Twenty-four hours later, patients were asked whether they recalled intraoperative events. They were then asked to answer the 15 questions, choosing from five possible answers to each, one of which was correct. The number of times each patient touched an ear during this interview was noted. No patient consciously recalled events during anesthesia. The number of questions answered correctly postoperatively did not differ according to whether the answers had been provided during anesthesia (at any isoflurane concentration) or had not been provided (control questions). The number of ear-touches postoperatively did not differ between those who had and had not received the intraoperative message encouraging ear-touching.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- R Dwyer
- Department of Anesthesiology, University of California, School of Medicine, San Francisco 94143-0648
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24
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Weiskopf RB, Eger EI, Ionescu P, Yasuda N, Cahalan MK, Freire B, Peterson N, Lockhart SH, Rampil IJ, Laster M. Desflurane does not produce hepatic or renal injury in human volunteers. Anesth Analg 1992; 74:570-4. [PMID: 1554124 DOI: 10.1213/00000539-199204000-00018] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.4] [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: 12/27/2022]
Abstract
We examined the potential toxicity of desflurane in 13 young 25.0 +/- 2.3 (mean +/- SD) yr-old men, given 7.35 +/- 0.81 MAC-hours of desflurane anesthesia. Hepatic and renal function tests, serum electrolytes, and standard urine and hematologic tests were performed before, during, and after anesthesia. No toxicity was found. There were no changes in tests of hepatocellular integrity (plasma alanine transferase activity), synthetic function (serum albumin, prothrombin time, partial thromboplastin time), or renal function (serum creatinine concentration, blood urea nitrogen concentration). Decreases in red blood cell count, hematocrit, and blood hemoglobin concentration during and immediately after anesthesia were attributed to blood sampling and infusion of intravenous electrolyte solution. These values returned by 4 days after anesthesia to values not different from those before anesthesia. Increased white blood cell counts and blood glucose concentrations noted during anesthesia with other inhaled anesthetics were also seen in these volunteers. Desflurane appears to have no greater toxicity than currently used inhaled anesthetics and, because of its lesser metabolism, may have lesser or not toxicity.
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Affiliation(s)
- R B Weiskopf
- Department of Anesthesia, University of California, San Francisco 94143-0648
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25
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Weiskopf RB, Cahalan MK, Ionescu P, Eger EI, Yasuda N, Lockhart SH, Rampil IJ, Laster M, Freire B, Peterson N. Cardiovascular actions of desflurane with and without nitrous oxide during spontaneous ventilation in humans. Anesth Analg 1991; 73:165-74. [PMID: 1854031] [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: 12/29/2022]
Abstract
We investigated the cardiovascular actions of desflurane (formerly I-653) during spontaneous ventilation. We gave 0.8-0.9, 1.2-1.3, and 1.6-1.7 MAC desflurane in oxygen (n = 6) and in 60% nitrous oxide, balance oxygen (n = 6) to unmedicated healthy male volunteers. Both anesthetic regimens decreased ventilation, increased partial pressure of arterial carbon dioxide, and produced similar cardiovascular changes. In comparison with values obtained when the volunteers were conscious, desflurane anesthesia with spontaneous ventilation decreased systemic vascular resistance and mean arterial blood pressure. Cardiac index, heart rate, stroke volume index, and central venous blood pressure increased. Left ventricular ejection fraction increased at 0.83 MAC desflurane in oxygen, and otherwise did not differ from the conscious value. The velocity of ventricular circumferential fiber shortening, estimated by echocardiography, increased with desflurane in oxygen but did not change with desflurane in nitrous oxide. Oxygen consumption increased during desflurane and oxygen anesthesia, but not when nitrous oxide plus oxygen was the background gas. Desflurane increased oxygen transport, the ratio of oxygen transport to oxygen consumption, mixed venous partial pressure of oxygen, and oxyhemoglobin saturation. The cardiovascular changes with desflurane during spontaneous ventilation differ from those during controlled ventilation. With both background gases, spontaneous ventilation, in comparison with controlled ventilation, increased cardiac index, stroke volume, central venous pressure, left ventricular ejection fraction, velocity of circumferential fiber shortening, oxygen transport, and the ratio of oxygen transport to oxygen consumption but did not change mean arterial blood pressure except at 1.66 MAC desflurane in oxygen (when it was higher with spontaneous than with controlled ventilation).
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Affiliation(s)
- R B Weiskopf
- Department of Anesthesia, University of California, San Francisco 94143-0648
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26
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Litt L, Lockhart S, Cohen Y, Yasuda N, Kim F, Freire B, Laster M, Peterson N, Taheri S, Chang LH. In vivo 19F nuclear magnetic resonance brain studies of halothane, isoflurane, and desflurane. Rapid elimination and no abundant saturable binding. Ann N Y Acad Sci 1991; 625:707-24. [PMID: 2058918 DOI: 10.1111/j.1749-6632.1991.tb33904.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- L Litt
- Department of Anesthesia, University of California, San Francisco 94143-0648
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27
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Lockhart SH, Yasuda N, Peterson N, Laster M, Taheri S, Weiskopf RB, Eger EI. Comparison of percutaneous losses of sevoflurane and isoflurane in humans. Anesth Analg 1991; 72:212-5. [PMID: 1985506 DOI: 10.1213/00000539-199102000-00013] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
We studied the percutaneous losses of sevoflurane and isoflurane during administration and elimination in seven healthy male volunteers. Anesthesia was induced and maintained with fentanyl, midazolam, and/or thiopental, and nitrous oxide for 30 min, after which 1% sevoflurane and 0.4% isoflurane in 65% nitrous oxide were administered for 30 min. Inspired, end-tidal, and mixed-expired gas samples were collected during administration and for 5-7 days of elimination. To measure percutaneous loss, each subject's arm was enclosed in a glass cylinder sealed at both ends and with two ports, one for flushing with nitrogen and one for obtaining gas samples during the 30 min of administration and the first 150 min of elimination. Anesthetic concentrations in all samples were determined using gas chromatography. The surface area of the arm was measured and the total surface area was calculated. During administration and elimination, percutaneous loss of isoflurane was significantly greater than that of sevoflurane (P less than 0.05). For both volatile agents, losses during elimination were greater than during administration (P less than 0.05), but even when combined, these losses were too small to affect kinetic or metabolic studies based on mass balance.
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Affiliation(s)
- S H Lockhart
- Department of Anesthesia, University of California, San Francisco 94143-0464
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28
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Cahalan MK, Weiskopf RB, Yasuda N, Eger EI, Ionescu P, Rampil IJ, Lockhart S, Caldwell J, Holmes MA, Freire B, Johnson BH, Laster M, Kelley S, Peterson N. Cardiovascular Effects of Desflurane and Nitrous Oxide in Humans. Anesth Analg 1990. [DOI: 10.1213/00000539-199002001-00046] [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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29
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Reeder L, Garza MA, Lofshult D, Peterson N, Toporek CD. California Quake. Emergency responders jolted into action. JEMS 1989; 14:24-5. [PMID: 10296406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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30
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Peterson N. The black and white world of private EMS. Part two: Seeking the competitive edge. JEMS 1988; 13:53-60. [PMID: 10290869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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31
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Peterson N. The black and white world of private EMS. Part one: The treacherous road to profits. JEMS 1988; 13:38-43, 67-9. [PMID: 10294419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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32
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Beckwith C, Peterson N, Liu JJ, Shadduck JA. Dot enzyme-linked immunosorbent assay (dot ELISA) for antibodies to Encephalitozoon cuniculi. Lab Anim Sci 1988; 38:573-6. [PMID: 3143028] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A dot-ELISA procedure was developed to detect antibodies against Encephalitozoon cuniculi. Sera from 84 rabbits, 22 dogs, 18 squirrel monkeys and 200 mice were tested by dot-ELISA and most also were tested by immunofluorescence. Comparison of the two tests showed that there was excellent agreement of the results (Kappa values greater than or equal to 0.74) in all four species. Dot-ELISA is a simple, quantitative, rapid alternative to immunofluorescence when large numbers of serum samples must be evaluated.
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Affiliation(s)
- C Beckwith
- Department of Veterinary Pathobiology, University of Illinois, Urbana 61801
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33
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Abstract
Two methods (manual and automated) for quantitation of viable versus dead Encephalitozoon cuniculi are reported. The manual method uses ethidium bromide and acridine orange to stain dead and viable organisms, respectively. The stained organisms are visually differentiated with the aid of a fluorescence microscope. The automated method uses propidium iodide to stain dead parasites, which are differentiated from viable unstained parasites with the aid of a flow cytometer. An automated cell counter (Coulter Counter) was used to count rapidly large numbers of samples and to improve the sensitivity of counting low concentrations of parasites. These methods will enhance investigators' abilities to conduct quantitative experiments on host defense mechanisms against E. cuniculi.
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Affiliation(s)
- N Peterson
- Department of Veterinary Pathobiology, University of Illinois, Urbana 61801
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34
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Abstract
We report a case of pure primary testicular carcinoid tumor and review the literature. Distinctions are emphasized among the 3 subgroups of testicular carcinoids and their clinical significance. Criteria to establish the diagnosis of pure primary testicular carcinoid are offered.
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Affiliation(s)
- D W Terhune
- Department of Urology, Naval Hospital, Portsmouth, Virginia
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35
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Abstract
Laparoscopic examination was performed successfully on 14 patients with 17 nonpalpable testes. The procedure was successful in determining the location in 16 of 17 nonpalpable testes, and this information was beneficial for selecting the subsequent operative approach. Laparoscopy was safe in the younger child (10 patients were 3 years old or less and 7 patients were less than 2 years old), and it added an insignificant increase in operative time.
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36
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Peterson N, Rohrmann CA, Lennard ES. Diagnosis and treatment of retroperitoneal perforation complicating the double-contrast barium-enema examination. Radiology 1982; 144:249-52. [PMID: 7089275 DOI: 10.1148/radiology.144.2.7089275] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A case of retroperitoneal air caused by rectal perforation during a double-contrast barium-enema examination is reported. In 9 similar reported cases, radiographic signs included perirectal, mediastinal, and cervical emphysema. Because of the frequent absence of clinical signs, radiographic recognition may be crucial for prompt management. Reported experience suggests that asymptomatic patients with these radiographic findings may be managed with hospitalization and close observation rather than immediate laparotomy.
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38
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Follman DA, Erhard C, Watson L, Stephany T, Lagoon BA, Guillebeau F, Halsey S, Roenicelli G, Peters MA, Peterson N, Anderson J, Gorman B, Heaney P, Saturley J, Knight J, Baeheler P, Edwards DA, Arlington J, Boisvert L, Ritchie P, Peter J, Larocco S, Harien S, Melia K, Conway B, Davis L, Tripp-Reimer T, Pollack RB. Letters. Am J Nurs 1977. [DOI: 10.2307/3461822] [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: 11/10/2022]
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39
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Abstract
Multiple cyst-like involvement of the kidney in a patient with lymphocytic lymphoma is presented. Both kidneys demonstrated the swiss-cheese appearance on nephrograms, simulating a typical adult type of polycystic disease. No tumor vessels or strains were noted.
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40
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41
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Abstract
All reported cases of massive postpartum right renal hemorrhage have involved healthy young primigravidas and blacks have predominated (4 of 7 women). Coagulopathies and underlying renal disease have been absent. Hematuria was painless in 5 of 8 cases. Hemorrhage began within 24 hours in 1 case, within 48 hours in 4 cases and 4 days post partum in 3 cases. Our first case is the only report in which hemorrhage has occurred in a primipara. Failure of closure or reopening of pyelovenous channels is suggested as the pathogenesis. The hemorrhage has been self-limiting, requiring no more than 1,500 cc whole blood replacement. Bleeding should stop spontaneously, and rapid renal pelvic clot lysis should follow with maintenance of adequate urine output and Foley catheter bladder decompression. To date surgical intervention has not been necessary.
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42
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Abstract
Basalt flows and bombs that contain remelted rhyolite glass can be dated by obsidian hydration dating.
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Goldman M, Knudson RJ, Mead J, Peterson N, Schwaber JR, Wohl ME. A simplified measurement of respiratory resistance by forced oscillation. J Appl Physiol (1985) 1970; 28:113-6. [PMID: 5409781 DOI: 10.1152/jappl.1970.28.1.113] [Citation(s) in RCA: 98] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
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44
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Gullers K, Malmborg AS, Nyström B, Norlander O, Peterson N. Clinical experience of disinfection of the engström respirator by ultrasonic nebulized ethyl alcohol. Acta Anaesthesiol Scand 1969; 13:247-54. [PMID: 4910635 DOI: 10.1111/j.1399-6576.1969.tb00447.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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45
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Burger EJ, Peterson N, Mead J, Wisnieski K. Method for measuring lung gas volume. J Appl Physiol (1985) 1969; 27:721-5. [PMID: 5360451 DOI: 10.1152/jappl.1969.27.5.721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
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46
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47
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Gullers K, Malmborg AS, Norlander O, Nystrom B, Peterson N. Pseudomonas Infection in Hospital. West J Med 1968. [DOI: 10.1136/bmj.1.5585.178-d] [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: 11/03/2022]
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48
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49
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Abstract
Changes in anteroposterior diameters of the rib cage and abdomen are sensed with magnetometers and summed to give outputs which are very nearly linearly related to changes in lung volume. The volume events of breathing can be measured without recourse to a mouthpiece or face mask, other than for calibration, and with minimal encumbrance to the subject.
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50
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Rusalem H, Peterson N, McCraney H. The role of the state rehabilitation counselor in institutional programming. Ment Retard 1967; 5:15-9. [PMID: 6044010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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