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Nimmo AF, Shinde S, Absalom AR. Remifentanil: achieving a 'standard concentration': a reply. Anaesthesia 2022; 77:944. [PMID: 35514203 DOI: 10.1111/anae.15749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/26/2022] [Indexed: 11/27/2022]
Affiliation(s)
| | | | - A R Absalom
- University of Groningen, Groningen, The Netherlands
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2
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Rodney G, Meek T, Klein AA, Nimmo AF. New standards of monitoring guidelines: a reply. Anaesthesia 2021; 76:1428-1429. [PMID: 34324702 DOI: 10.1111/anae.15558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/08/2021] [Indexed: 11/29/2022]
Affiliation(s)
| | - T Meek
- James Cook University Hospital, Middlesbrough, UK
| | - A A Klein
- Royal Papworth Hospital, Cambridge, UK
| | - A F Nimmo
- Royal Infirmary of Edinburgh, Edinburgh, UK
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3
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Klein AA, Meek T, Allcock E, Cook TM, Mincher N, Morris C, Nimmo AF, Pandit JJ, Pawa A, Rodney G, Sheraton T, Young P. Recommendations for standards of monitoring during anaesthesia and recovery 2021: Guideline from the Association of Anaesthetists. Anaesthesia 2021; 76:1212-1223. [PMID: 34013531 DOI: 10.1111/anae.15501] [Citation(s) in RCA: 116] [Impact Index Per Article: 38.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/13/2021] [Indexed: 02/06/2023]
Abstract
This guideline updates and replaces the 5th edition of the Standards of Monitoring published in 2015. The aim of this document is to provide guidance on the minimum standards for monitoring of any patient undergoing anaesthesia or sedation under the care of an anaesthetist. The recommendations are primarily aimed at anaesthetists practising in the UK and Ireland, but it is recognised that these guidelines may also be of use in other areas of the world. Minimum standards for monitoring patients during anaesthesia and in the recovery phase are included. There is also guidance on monitoring patients undergoing sedation and during transfer. There are new sections specifically discussing capnography, sedation and regional anaesthesia. In addition, the indications for processed electroencephalogram and neuromuscular monitoring have been updated.
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Affiliation(s)
- A A Klein
- Department of Anaesthesia and Intensive Care, Royal Papworth Hospital, Co-Chair, Association of Anaesthetists Working Party, Cambridge, UK
| | - T Meek
- Department of Anaesthesia, James Cook University Hospital, Co-Chair, Association of Anaesthetists Working Party, Middlesbrough, UK
| | - E Allcock
- Department of Anaesthesia, James Cook University Hospital, Middlesbrough, UK
| | - T M Cook
- Royal United Hospital NHS Trust, Bath, UK
| | - N Mincher
- Department of Anaesthesia, Royal Gwent Hospital, Newport, UK
| | | | - A F Nimmo
- Department of Anaesthesia, Royal Infirmary of Edinburgh, Edinburgh, UK
| | - J J Pandit
- University of Oxford, Royal College of Anaesthetists, Oxford, UK
| | - A Pawa
- Department of Anaesthesia, Guy's and St Thomas' NHS Foundation Trust, President, Regional Anaesthesia UK (RA-UK), London, UK
| | - G Rodney
- Department of Anaesthesia, Ninewells Hospital, Dundee, UK
| | - T Sheraton
- Department of Anaesthesia, Royal Gwent Hospital, Newport, UK
| | - P Young
- Department of Anaesthesia and Critical Care, Queen Elizabeth Hospital, Kings Lynn, UK
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4
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Nimmo AF, Absalom AR, Cook TM, Mulvey D, Shinde S. Association of Anaesthetists guidelines for the safe practice of total intravenous anaesthesia. A reply. Anaesthesia 2019; 74:677-678. [DOI: 10.1111/anae.14613] [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: 11/29/2022]
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Morrison GA, Koch J, Royds M, McGee D, Chalmers RTA, Anderson J, Nimmo AF. Fibrinogen concentrate vs. fresh frozen plasma for the management of coagulopathy during thoraco-abdominal aortic aneurysm surgery: a pilot randomised controlled trial. Anaesthesia 2018; 74:180-189. [DOI: 10.1111/anae.14495] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/08/2018] [Indexed: 01/09/2023]
Affiliation(s)
- G. A. Morrison
- Department of Anaesthesia; Royal Infirmary of Edinburgh; Scotland UK
| | - J. Koch
- Department of Anaesthesia; Royal Infirmary of Edinburgh; Scotland UK
| | - M. Royds
- Department of Anaesthesia; Royal Infirmary of Edinburgh; Scotland UK
| | - D. McGee
- Better Blood Transfusion; Scottish National Blood Transfusion Service; The Jack Copland Centre; Heriot-Watt Research Park; Edinburgh UK
| | - R. T. A. Chalmers
- Department of Vascular Surgery; Royal Infirmary of Edinburgh; Scotland UK
| | - J. Anderson
- Department of Haematology; Royal Infirmary of Edinburgh; Scotland UK
| | - A. F. Nimmo
- Department of Anaesthesia; Royal Infirmary of Edinburgh; Scotland UK
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Nimmo AF, Absalom AR, Bagshaw O, Biswas A, Cook TM, Costello A, Grimes S, Mulvey D, Shinde S, Whitehouse T, Wiles MD. Guidelines for the safe practice of total intravenous anaesthesia (TIVA). Anaesthesia 2018; 74:211-224. [DOI: 10.1111/anae.14428] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/02/2018] [Indexed: 12/16/2022]
Affiliation(s)
- A. F. Nimmo
- Department of Anaesthesia; Royal Infirmary of Edinburgh; Edinburgh UK; Society for Intravenous Anaesthesia (Co-Chair of the Working party)
| | - A. R. Absalom
- Department of Anesthesiology; University Medical Center Groningen; University of Groningen; Groningen The Netherlands: Society for Intravenous Anaesthesia
| | - O. Bagshaw
- Department of Anaesthesia; Birmingham Women's and Children's NHS Foundation Trust; Birmingham UK; Association of Paediatric Anaesthetists of Great Britain and Ireland
| | - A. Biswas
- Adult/Obstetric Anesthesiology; Sidra Medicine; Qatar Foundation; Doha Qatar; Society for Intravenous Anaesthesia
| | - T. M. Cook
- Department of Anaesthesia and Intensive Care Medicine; Royal United Hospital NHS Foundation Trust; Bath UK; Royal College of Anaesthetists
| | - A. Costello
- Department of Anaesthesia; Milton Keynes University Hospital NHS Foundation Trust; UK; Association of
Anaesthetists Trainee Committee
| | - S. Grimes
- Department of Anaesthesia; Mid Western Regional Hospital; Limerick Ireland; College of
Anaesthesiologists of Ireland
| | - D. Mulvey
- Department of Anaesthesia; Derby Teaching Hospitals NHS Foundation Trust; Derby UK; Society for Intravenous Anaesthesia
| | - S. Shinde
- Department of Anaesthesia; North Bristol NHS Trust; Bristol UK; Association of Anaesthetists (Co-Chair of the Working Party)
| | - T. Whitehouse
- Department of Anaesthesia and Critical Care; University Hospitals Birmingham NHS Foundation Trust; Birmingham UK; Intensive Care Society
| | - M. D. Wiles
- Department of Anaesthesia; Sheffield Teaching Hospitals NHS Foundation Trust; Sheffield UK; Editor, Anaesthesia
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Klein AA, Bailey CR, Charlton A, Lawson C, Nimmo AF, Payne S, Ruck Keene A, Shortland R, Smith J, Torella F, Wade P. Association of Anaesthetists: anaesthesia and peri-operative care for Jehovah's Witnesses and patients who refuse blood. Anaesthesia 2018; 74:74-82. [DOI: 10.1111/anae.14441] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/15/2018] [Indexed: 12/23/2022]
Affiliation(s)
- A. A. Klein
- Department of Anaesthesia and Intensive Care; Royal Papworth Hospital, Cambridge; UK and Chair, Working Party, Association of Anaesthetists
| | - C. R. Bailey
- Anaesthetic Department; Guys and St. Thomas’ NHS Foundation Trust, London; UK and Association of Anaesthetists Council Member
| | - A. Charlton
- Haematology; NHS Blood and Transplant; and Newcastle upon Tyne NHS Foundation Trust; Newcastle UK
| | - C. Lawson
- Northern School of Anaesthesia and Intensive Care Medicine; UK and Group of Anaesthetists in Training (GAT) Committee Member
| | - A. F. Nimmo
- Department of Anaesthesia; Royal Infirmary of Edinburgh; and Royal College of Anaesthetists Representative; Edinburgh UK
| | | | - A. Ruck Keene
- Honorary Research Lecturer; University of Manchester; Wellcome Trust Research Fellow; Kings College London; UK
| | - R. Shortland
- Hospital Liaison Committee for Jehovah's Witnesses; Cambridge
| | - J. Smith
- Department of Anaesthesia and Intensive Care; Freeman Hospital; Newcastle upon Tyne and Association of Paediatric Anaesthetists of Great Britain and Ireland (APAGBI) representative
| | - F. Torella
- Liverpool Vascular and Endovascular Service; Liverpool,UK and School of Physical Sciences, University of Liverpool and Royal College of Surgeons representative
| | - P. Wade
- Hospital Information Services for Jehovah's Witnesses; London
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Klein AA, Bailey CR, Charlton AJ, Evans E, Guckian-Fisher M, McCrossan R, Nimmo AF, Payne S, Shreeve K, Smith J, Torella F. Association of Anaesthetists guidelines: cell salvage for peri-operative blood conservation 2018. Anaesthesia 2018; 73:1141-1150. [DOI: 10.1111/anae.14331] [Citation(s) in RCA: 79] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/20/2018] [Indexed: 01/03/2023]
Affiliation(s)
- A. A. Klein
- Department of Anaesthesia and Intensive Care; Royal Papworth Hospital; Cambridge UK
| | - C. R. Bailey
- Department of Anaesthesia, Guys and St; Thomas' NHS Foundation Trust; London UK
| | - A. J. Charlton
- NHS Blood and Transplant; Newcastle upon Tyne NHS Foundation Trust; Newcastle UK
| | - E. Evans
- Department of Obstetric Anaesthesia; St George's University Hospitals NHS Foundation Trust; London UK
| | - M. Guckian-Fisher
- Immediate Past President; The Association for Peri-operative Practice (AFPP); UK
| | - R. McCrossan
- Northern School of Anaesthesia; Royal Victoria Infirmary; Newcastle upon Tyne NHS Foundation Trust; Newcastle UK
| | - A. F. Nimmo
- Department of Anaesthesia; Royal Infirmary of Edinburgh; Edinburgh UK
| | | | - K. Shreeve
- Better Blood Transfusion Team; Welsh Blood Service; Co-chair of UK Cell Salvage Action Group; UK
| | - J. Smith
- Department of Paediatric Cardiothoracic Anaesthesia and Intensive Care; Freeman Hospital; Newcastle upon Tyne NHS Foundation Trust; Newcastle UK
| | - F. Torella
- Liverpool Vascular and Endovascular Service; Liverpool UK
- School of Physical Sciences; University of Liverpool; Liverpool UK
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Pandit JJ, Andrade J, Bogod DG, Hitchman JM, Jonker WR, Lucas N, Mackay JH, Nimmo AF, O'Connor K, O'Sullivan EP, Paul RG, Palmer JHM, Plaat F, Radcliffe JJ, Sury MRJ, Torevell HE, Wang M, Hainsworth J, Cook TM. The 5th National Audit Project (NAP5) on accidental awareness during general anaesthesia: summary of main findings and risk factors. Anaesthesia 2014; 69:1089-101. [PMID: 25204236 DOI: 10.1111/anae.12826] [Citation(s) in RCA: 112] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/15/2014] [Indexed: 12/17/2022]
Abstract
We present the main findings of the 5th National Audit Project on accidental awareness during general anaesthesia. Incidences were estimated using reports of accidental awareness as the numerator, and a parallel national anaesthetic activity survey to provide denominator data. The incidence of certain/probable and possible accidental awareness cases was ~1:19 600 anaesthetics (95% CI 1:16 700-23 450). However, there was considerable variation across subtypes of techniques or subspecialties. The incidence with neuromuscular blockade was ~1:8200 (1:7030-9700), and without it was ~1:135 900 (1:78 600-299 000). The cases of accidental awareness during general anaesthesia reported to 5th National Audit Project were overwhelmingly cases of unintended awareness during neuromuscular blockade. The incidence of accidental awareness during caesarean section was ~1:670 (1:380-1300). Two thirds (82, 66%) of cases of accidental awareness experiences arose in the dynamic phases of anaesthesia, namely induction of and emergence from anaesthesia. During induction of anaesthesia, contributory factors included: use of thiopental; rapid sequence induction; obesity; difficult airway management; neuromuscular blockade; and interruptions of anaesthetic delivery during movement from anaesthetic room to theatre. During emergence from anaesthesia, residual paralysis was perceived by patients as accidental awareness, and commonly related to a failure to ensure full return of motor capacity. One third (43, 33%) of accidental awareness events arose during the maintenance phase of anaesthesia, most due to problems at induction or towards the end of anaesthesia. Factors increasing the risk of accidental awareness included: female sex; age (younger adults, but not children); obesity; anaesthetist seniority (junior trainees); previous awareness; out-of-hours operating; emergencies; type of surgery (obstetric, cardiac, thoracic); and use of neuromuscular blockade. The following factors were not risk factors for accidental awareness: ASA physical status; race; and use or omission of nitrous oxide. We recommend that an anaesthetic checklist, to be an integral part of the World Health Organization Safer Surgery checklist, is introduced as an aid to preventing accidental awareness. This paper is a shortened version describing the main findings from 5th National Audit Project - the full report can be found at http://www.nationalauditprojects.org.uk/NAP5_home#pt.
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Affiliation(s)
- J J Pandit
- Nuffield Department of Anaesthesia, Oxford University Hospitals NHS Trust, Oxford, UK
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10
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Pandit JJ, Andrade J, Bogod DG, Hitchman JM, Jonker WR, Lucas N, Mackay JH, Nimmo AF, O'Connor K, O'Sullivan EP, Paul RG, Palmer JHMG, Plaat F, Radcliffe JJ, Sury MRJ, Torevell HE, Wang M, Hainsworth J, Cook TM. 5th National Audit Project (NAP5) on accidental awareness during general anaesthesia: summary of main findings and risk factors. Br J Anaesth 2014; 113:549-59. [PMID: 25204697 DOI: 10.1093/bja/aeu313] [Citation(s) in RCA: 254] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
We present the main findings of the 5th National Audit Project (NAP5) on accidental awareness during general anaesthesia (AAGA). Incidences were estimated using reports of accidental awareness as the numerator, and a parallel national anaesthetic activity survey to provide denominator data. The incidence of certain/probable and possible accidental awareness cases was ~1:19,600 anaesthetics (95% confidence interval 1:16,700-23,450). However, there was considerable variation across subtypes of techniques or subspecialities. The incidence with neuromuscular block (NMB) was ~1:8200 (1:7030-9700), and without, it was ~1:135,900 (1:78,600-299,000). The cases of AAGA reported to NAP5 were overwhelmingly cases of unintended awareness during NMB. The incidence of accidental awareness during Caesarean section was ~1:670 (1:380-1300). Two-thirds (82, 66%) of cases of accidental awareness experiences arose in the dynamic phases of anaesthesia, namely induction of and emergence from anaesthesia. During induction of anaesthesia, contributory factors included: use of thiopental, rapid sequence induction, obesity, difficult airway management, NMB, and interruptions of anaesthetic delivery during movement from anaesthetic room to theatre. During emergence from anaesthesia, residual paralysis was perceived by patients as accidental awareness, and commonly related to a failure to ensure full return of motor capacity. One-third (43, 33%) of accidental awareness events arose during the maintenance phase of anaesthesia, mostly due to problems at induction or towards the end of anaesthesia. Factors increasing the risk of accidental awareness included: female sex, age (younger adults, but not children), obesity, anaesthetist seniority (junior trainees), previous awareness, out-of-hours operating, emergencies, type of surgery (obstetric, cardiac, thoracic), and use of NMB. The following factors were not risk factors for accidental awareness: ASA physical status, race, and use or omission of nitrous oxide. We recommend that an anaesthetic checklist, to be an integral part of the World Health Organization Safer Surgery checklist, is introduced as an aid to preventing accidental awareness. This paper is a shortened version describing the main findings from NAP5--the full report can be found at http://www.nationalauditprojects.org.uk/NAP5_home.
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Affiliation(s)
- J J Pandit
- Nuffield Department of Anaesthetics, Oxford University Hospitals NHS Trust, Oxford, UK
| | - J Andrade
- Department of Psychology, School of Psychology and Cognition Institute, Plymouth University, Plymouth, UK
| | - D G Bogod
- Department of Anaesthesia, Nottingham University Hospitals NHS Trust, Nottingham, UK
| | - J M Hitchman
- Member Royal College of Anaesthetists' Lay Committee, London, UK
| | - W R Jonker
- Department of Anaesthesia, Intensive Care and Pain Medicine, Sligo Regional Hospital, Sligo, Ireland
| | - N Lucas
- Department of Anaesthesia, Northwick Park Hospital, Harrow, Middlesex, UK
| | - J H Mackay
- Department of Anaesthesia, Papworth Hospital, Cambridge, UK
| | - A F Nimmo
- Department of Anaesthesia, Royal Infirmary of Edinburgh, Edinburgh, UK
| | - K O'Connor
- Bristol School of Anaesthesia, Bristol, UK
| | - E P O'Sullivan
- Department of Anaesthesia, St James Hospital, James Street, Dublin, Ireland
| | - R G Paul
- Adult Intensive Care Unit, Royal Brompton Hospital, London, UK
| | - J H M G Palmer
- Department of Anaesthesia, Salford Royal Hospital, Salford, UK
| | - F Plaat
- Department of Anaesthesia, Imperial College NHS Trust, London, UK
| | - J J Radcliffe
- Department of Neuroanaesthesia, National Hospital for Neurology and Neurosurgery, Queen Square, UK
| | - M R J Sury
- Department of Anaesthesia, Great Ormond Street Hospital NHS Foundation Trust, London, UK
| | - H E Torevell
- Bradford Teaching Hospitals NHS Foundation Trust, Bradford, UK
| | - M Wang
- University of Leicester, Leicester, UK
| | - J Hainsworth
- Leicestershire Partnership NHS Trust, Leicester, UK
| | - T M Cook
- Department of Anaesthesia and Intensive Care Medicine, Royal United Hospital, Bath, UK
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Pandit JJ, Andrade J, Bogod DG, Hitchman JM, Jonker WR, Lucas N, Mackay JH, Nimmo AF, O'Connor K, O'Sullivan EP, Paul RG, Palmer JHM, Plaat F, Radcliffe JJ, Sury MRJ, Torevell HE, Wang M, Cook TM. The 5th National Audit Project (NAP5) on accidental awareness during general anaesthesia: protocol, methods and analysis of data. Anaesthesia 2014; 69:1078-88. [DOI: 10.1111/anae.12811] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/10/2014] [Indexed: 01/22/2023]
Affiliation(s)
- J. J. Pandit
- Nuffield Department of Anaesthetics; Oxford University Hospitals NHS Trust; Oxford UK
| | - J. Andrade
- Department of Psychology; School of Psychology and Cognition Institute; Plymouth University; Plymouth UK
| | - D. G. Bogod
- Department of Anaesthesia; Nottingham University Hospitals NHS Trust; Nottingham UK
| | | | - W. R. Jonker
- Department of Anaesthesia; Intensive Care and Pain Medicine; Sligo Regional Hospital; Sligo Ireland
| | - N. Lucas
- Department of Anaesthesia; Northwick Park Hospital; Harrow Middlesex UK
| | - J. H. Mackay
- Department of Anaesthesia; Papworth Hospital; Cambridge UK
| | - A. F. Nimmo
- Department of Anaesthesia; Royal Infirmary of Edinburgh; Edinburgh UK
| | | | | | - R. G. Paul
- Adult Intensive Care Unit; Royal Brompton Hospital; London UK
| | | | - F. Plaat
- Department of Anaesthesia; Imperial College NHS Trust; London UK
| | - J. J. Radcliffe
- Department of Neuroanaesthesia; National Hospital for Neurology and Neurosurgery; Queen Square UK
| | - M. R. J. Sury
- Department of Anaesthesia; Great Ormond Street Hospital; London UK
| | - H. E. Torevell
- Bradford Teaching Hospitals NHS Foundation Trust; Bradford UK
| | - M. Wang
- Department of Clinical Psychology; University of Leicester; Leicester UK
| | - T. M. Cook
- Department of Anaesthesia and Intensive Care Medicine; Royal United Hospital; Bath UK
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Cook TM, Andrade J, Bogod DG, Hitchman JM, Jonker WR, Lucas N, Mackay JH, Nimmo AF, O'Connor K, O'Sullivan EP, Paul RG, Palmer JHM, Plaat F, Radcliffe JJ, Sury MRJ, Torevell HE, Wang M, Hainsworth J, Pandit JJ. The 5th National Audit Project (NAP5) on accidental awareness during general anaesthesia: patient experiences, human factors, sedation, consent and medicolegal issues. Anaesthesia 2014; 69:1102-16. [DOI: 10.1111/anae.12827] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/15/2014] [Indexed: 11/30/2022]
Affiliation(s)
- T. M. Cook
- Department of Anaesthesia and Intensive Care Medicine; Royal United Hospital; Bath UK
| | - J. Andrade
- Department of Psychology; School of Psychology and Cognition Institute; Plymouth University; Plymouth UK
| | - D. G. Bogod
- Nottingham University Hospitals NHS Trust; Nottingham UK
| | | | - W. R. Jonker
- Department of Anaesthesia, Intensive Care and Pain Medicine; Sligo Regional Hospital; Sligo Ireland
| | - N. Lucas
- Northwick Park Hospital; Harrow Middlesex UK
| | | | - A. F. Nimmo
- Department of Anaesthesia; Royal Infirmary of Edinburgh; Edinburgh UK
| | | | | | - R. G. Paul
- Adult Intensive Care Unit; Royal Brompton Hospital; London UK
| | | | - F. Plaat
- Department of Anaesthesia; Imperial College NHS Trust; London UK
| | - J. J. Radcliffe
- Department of Neuroanaesthesia; National Hospital for Neurology and Neurosurgery; University College Hospitals London Trust; London UK
| | - M. R. J. Sury
- Department of Anaesthesia; Great Ormond Street Hospital NHS Foundation Trust; London UK
| | - H. E. Torevell
- Bradford Teaching Hospitals NHS Foundation Trust; Bradford UK
| | - M. Wang
- Department of Clinical Psychology; University of Leicester; Leicester UK
| | | | - J. J. Pandit
- Nuffield Department of Anaesthesia; Oxford University Hospitals NHS Trust; Oxford UK
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Cook TM, Andrade J, Bogod DG, Hitchman JM, Jonker WR, Lucas N, Mackay JH, Nimmo AF, O'Connor K, O'Sullivan EP, Paul RG, Palmer JHMG, Plaat F, Radcliffe JJ, Sury MRJ, Torevell HE, Wang M, Hainsworth J, Pandit JJ. 5th National Audit Project (NAP5) on accidental awareness during general anaesthesia: patient experiences, human factors, sedation, consent, and medicolegal issues. Br J Anaesth 2014; 113:560-74. [PMID: 25204696 DOI: 10.1093/bja/aeu314] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The 5th National Audit Project (NAP5) of the Royal College of Anaesthetists and the Association of Anaesthetists of Great Britain and Ireland into accidental awareness during general anaesthesia (AAGA) yielded data related to psychological aspects from the patient, and the anaesthetist, perspectives; patients' experiences ranged from isolated auditory or tactile sensations to complete awareness. A striking finding was that 75% of experiences were for <5 min, yet 51% of patients [95% confidence interval (CI) 43-60%] experienced distress and 41% (95% CI 33-50%) suffered longer term adverse effect. Distress and longer term harm occurred across the full range of experiences but were particularly likely when the patient experienced paralysis (with or without pain). The patient's interpretation of what is happening at the time of the awareness seemed central to later impact; explanation and reassurance during suspected AAGA or at the time of report seemed beneficial. Quality of care before the event was judged good in 26%, poor in 39%, and mixed in 31%. Three-quarters of cases of AAGA (75%) were judged preventable. In 12%, AAGA care was judged good and the episode not preventable. The contributory and human factors in the genesis of the majority of cases of AAGA included medication, patient, and education/training. The findings have implications for national guidance, institutional organization, and individual practice. The incidence of 'accidental awareness' during sedation (~1:15,000) was similar to that during general anaesthesia (~1:19,000). The project raises significant issues about information giving and consent for both sedation and anaesthesia. We propose a novel approach to describing sedation from the patient's perspective which could be used in communication and consent. Eight (6%) of the patients had resorted to legal action (12, 11%, to formal complaint) at the time of reporting. NAP5 methodology provides a standardized template that might usefully inform the investigation of claims or serious incidents related to AAGA.
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Affiliation(s)
- T M Cook
- Department of Anaesthesia and Intensive Care Medicine, Royal United Hospital, Bath, UK
| | - J Andrade
- School of Psychology and Cognition Institute, Plymouth University, Plymouth, UK
| | - D G Bogod
- Nottingham University Hospitals NHS Trust, Nottingham, UK
| | - J M Hitchman
- Member Royal College of Anaesthetists' Lay Committee, London, UK
| | - W R Jonker
- Department of Anaesthesia, Intensive Care and Pain Medicine, Sligo Regional Hospital, Sligo, Ireland
| | - N Lucas
- Northwick Park Hospital, Harrow, Middlesex, UK
| | | | - A F Nimmo
- Department of Anaesthesia, Royal Infirmary of Edinburgh, Edinburgh, UK
| | - K O'Connor
- Bristol School of Anaesthesia, Bristol, UK
| | | | - R G Paul
- Adult Intensive Care Unit, Royal Brompton Hospital, London, UK
| | | | - F Plaat
- Imperial College NHS Trust, London, UK
| | - J J Radcliffe
- Department of Neuroanaesthesia, National Hospital for Neurology and Neurosurgery, Queen Square, London, UK
| | - M R J Sury
- Great Ormond Street Hospital NHS Foundation Trust, London, UK
| | - H E Torevell
- Bradford Teaching Hospitals NHS Foundation Trust, Bradford, UK
| | - M Wang
- University of Leicester, Leicester, UK
| | - J Hainsworth
- Leicestershire Partnership NHS Trust, Leicester, UK
| | - J J Pandit
- Nuffield Department of Anaesthetics, Oxford University Hospitals NHS Trust, Oxford, UK
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Thomson AJ, Nimmo AF, Engbers FHM, Glen JB. A novel technique to determine an ‘apparent ke0’ value for use with the Marsh pharmacokinetic model for propofol. Anaesthesia 2014; 69:420-8. [DOI: 10.1111/anae.12596] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/03/2014] [Indexed: 11/27/2022]
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Thomson AJ, Morrison G, Thomson E, Beattie C, Nimmo AF, Glen JB. Induction of general anaesthesia by effect-site target-controlled infusion of propofol: influence of pharmacokinetic model and ke0value. Anaesthesia 2014; 69:429-35. [DOI: 10.1111/anae.12597] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/03/2014] [Indexed: 12/01/2022]
Affiliation(s)
| | | | - E. Thomson
- Royal Infirmary of Edinburgh; Edinburgh UK
| | - C. Beattie
- Royal Infirmary of Edinburgh; Edinburgh UK
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16
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Beattie C, Moores C, Thomson AJ, Nimmo AF. The effect of anaesthesia and aortic clamping on cardiac output measurement using arterial pulse power analysis during aortic aneurysm repair. Anaesthesia 2011; 65:1194-9. [PMID: 21182600 DOI: 10.1111/j.1365-2044.2010.06558.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The LiDCO plus monitor (LiDCO Ltd, Cambridge, UK) uses pulse contour analysis of the arterial pressure waveform to indicate changes in stroke volume and cardiac output. Calibration against a lithium indicator dilution method is required to permit display of absolute values in addition to trends. The effect of haemodynamic changes during anaesthesia and surgery on this calibration factor has not previously been studied. Therefore, we investigated whether it remained constant during elective abdominal aortic aneurysm surgery in 15 patients. Comparison between the calibration factor values at different time points was made by repeated recalibration throughout the peri-operative period. Calibration factor increased by a mean of 53% after anaesthesia (epidural plus general) (p = 0.03) and decreased by a mean of 40% after aortic clamping (p = 0.0001). Recalibration should be undertaken after induction of anaesthesia and after aortic clamping if absolute values of cardiac output and stroke volume are required.
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Affiliation(s)
- C Beattie
- Department of Anaesthesia, Critical Care and Pain Medicine, Royal Infirmary of Edinburgh, Edinburgh, UK.
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17
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Richards JMJ, Nimmo AF, Moores CR, Hansen PA, Murie JA, Chalmers RTA. Contemporary results for open repair of suprarenal and type IV thoracoabdominal aortic aneurysms. Br J Surg 2009; 97:45-9. [DOI: 10.1002/bjs.6848] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Abstract
Background
Endovascular and hybrid procedures are not yet widely established in the management of type IV thoracoabdominal aortic aneurysm (TAAA). Open surgery remains the treatment of choice until the long-term outcomes of these novel techniques are known.
Methods
This study reviewed a 10-year experience of open repair of non-ruptured type IV and suprarenal TAAA. All procedures were performed using a totally abdominal approach with supracoeliac clamping of the aorta.
Results
There were 53 patients (31 men; 58 per cent) of median age 69 (range 54–82) years. Forty-four patients had a type IV TAAA and nine a suprarenal aneurysm. Three patients (6 per cent) died within 30 days and the 12-month mortality rate for patients followed for at least 1 year was 6 per cent (three of 49). Ten patients (19 per cent) had a cardiac complication, 20 (38 percent) a respiratory complication, three (6 percent) required early reoperation, and one patient (2 percent) developed permanent paraplegia. There was one late death resulting from an aneurysm-related complication.
Conclusion
Open repair of suprarenal aneurysms and type IV TAAA may be undertaken using a totally abdominal approach with acceptable levels of morbidity and mortality.
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Affiliation(s)
- J M J Richards
- Vascular Surgical Service, Royal Infirmary of Edinburgh, Edinburgh, UK
| | - A F Nimmo
- Vascular Surgical Service, Royal Infirmary of Edinburgh, Edinburgh, UK
| | - C R Moores
- Vascular Surgical Service, Royal Infirmary of Edinburgh, Edinburgh, UK
| | - P A Hansen
- Vascular Surgical Service, Royal Infirmary of Edinburgh, Edinburgh, UK
| | - J A Murie
- Vascular Surgical Service, Royal Infirmary of Edinburgh, Edinburgh, UK
| | - R T A Chalmers
- Vascular Surgical Service, Royal Infirmary of Edinburgh, Edinburgh, UK
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18
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Thomson AJ, Nimmo AF, Tiplady B, Glen JB. Evaluation of a new method of assessing depth of sedation using two-choice visual reaction time testing on a mobile phone. Anaesthesia 2009; 64:32-8. [PMID: 19087003 DOI: 10.1111/j.1365-2044.2008.05683.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The utility of two-choice visual reaction time testing using a specially programmed mobile telephone as a measure of sedation level was investigated in 20 healthy patients sedated with target controlled infusions of propofol. At gradually increasing target concentrations visual reaction time was compared with patient-assessed visual analogue scale sedation scores and an observer-rated scale. Propofol sedation caused dose-dependent increases in visual reaction time and visual analogue scale scores that were statistically significant when the calculated effect-site concentration reached 0.9 microg.ml(-1) (p < 0.05) and 0.5 microg.ml(-1) (p < 0.01) respectively. While visual analogue scale scores were more sensitive at lower levels of sedation than visual reaction time, the latter demonstrated marked increase in values at higher levels of sedation. Visual reaction time may be useful for identifying impending over-sedation.
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Affiliation(s)
- A J Thomson
- Department of Anaesthesia, Critical Care and Pain Medicine, Ral Infirmary of Edinburgh, Edinburgh, UK
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19
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Forbes RD, Nimmo AF, Moores C, Chalmers RTA. Does inferior alveolar nerve block improve anaesthesia for awake carotid endarterectomy? Anaesthesia 2008. [DOI: 10.1111/j.1365-2044.2007.05350_3.x] [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: 12/01/2022]
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Abstract
OBJECTIVE To assess the relationship between early laboratory parameters, disease severity, type of management (surgical or conservative) and outcome in necrotizing enterocolitis (NEC). STUDY DESIGN Retrospective collection and analysis of data from infants treated in a single tertiary care center (1980 to 2002). Data were collected on disease severity (Bell stage), birth weight (BW), gestational age (GA) and pre-intervention laboratory parameters (leukocyte and platelet counts, hemoglobin, lactate, C-reactive protein). RESULTS Data from 128 infants were sufficient for analysis. Factors significantly associated with survival were Bell stage (P<0.05), lactate (P<0.05), BW and GA (P<0.01, P<0.001, respectively). From receiver operating characteristics curves, the highest predictive value resulted from a score with 0 to 8 points combining BW, Bell stage, lactate and platelet count (P<0.001). At a cutoff level of 4.5 sensitivity and specificity for predicting survival were 0.71 and 0.72, respectively. CONCLUSION Some single parameters were associated with poor outcome in NEC. Optimal risk stratification was achieved by combining several parameters in a score.
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MESH Headings
- Birth Weight
- Enterocolitis, Necrotizing/blood
- Enterocolitis, Necrotizing/classification
- Enterocolitis, Necrotizing/mortality
- Enterocolitis, Necrotizing/therapy
- Female
- Gestational Age
- Humans
- Infant, Newborn
- Infant, Premature
- Infant, Premature, Diseases/classification
- Infant, Premature, Diseases/mortality
- Infant, Premature, Diseases/therapy
- Lactic Acid/blood
- Male
- ROC Curve
- Retrospective Studies
- Sensitivity and Specificity
- Severity of Illness Index
- Survival Analysis
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Affiliation(s)
- U Kessler
- Department of Surgical Pediatrics, Inselspital, University of Berne, Switzerland
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21
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Abstract
BACKGROUND Local anaesthesia (LA) for carotid endarterectomy (CEA) may offer advantages over general anaesthesia (GA). AIM Our aim was to compare outcome from CEA before and after changing our anaesthetic technique from GA to LA. METHODS Sequential patients who underwent CEA between January 1997 and December 2001 were identified from a prospectively collected database. GA was used during the first two years of this period and LA was used exclusively over the last three years. Differences in the incidence of intraoperative shunting, perioperative stroke and transient ischaemic attack (TIA), cranial nerve injury, neck haematoma, perioperative death and duration of hospital stay were assessed. RESULTS Three hundred and seventy one CEAs were carried out in 363 patients, 179 under GA and 192 under LA. Indications were TIAs (140), stroke with recovery (134), amaurosis fugax (85) and asymptomatic high-grade stenosis (12). Intraoperative shunting was used in 66 (37%) GA operations and 36 (18.8%) LA operations (p<0.01). There were nine strokes and four transient neurological events; 10 (5.5%) patients developed such problems with GA and three (1.6%) with LA (p<0.05). There were four deaths, three (1.7%) after GA and one (0.5%) after LA (p=NS). Duration of hospital stay was less in the LA group at a median (range) of three days (2-10) compared with 4.5 (3-14) days in the GA group (p<0.001). CONCLUSION Employing LA rather than GA for CEA has been associated with a reduction in intraoperative shunting and perioperative stroke, and the duration of hospital stay. LA appears to offer clinical and possible cost advantages over GA.
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Affiliation(s)
- R Mofidi
- Department of Vascular Surgery, Royal Infirmary of Edinburgh, Scotland
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22
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Howell SJ, Thompson JP, Nimmo AF, Snowden C, Edwards ND, Carlisle J, Suleiman MS, Baumbach A. Relationship between perioperative troponin elevation and other indicators of myocardial injury in vascular surgery patients. Br J Anaesth 2006; 96:303-9. [PMID: 16415314 DOI: 10.1093/bja/aei317] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [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: 11/12/2022] Open
Abstract
BACKGROUND In 2000 the European Society of Cardiology and the American College of Cardiology published a consensus document revising the definition of myocardial infarction. The usefulness of this revised definition has been challenged. It has been suggested that, rather than any release of cardiac troponin being potentially diagnostic of myocardial infarction, a diagnostic threshold consistent with significant myocardial injury should be defined. METHODS We studied 65 patients undergoing elective major vascular surgery to examine the relationship between the magnitude of cardiac troponin I (cTnI) and creatine kinase MB fraction (CK-MB) release and clinical signs or symptoms of myocardial injury. cTnI and CK-MB concentrations were measured preoperatively and on the first 4 postoperative days using the ACCESS assay (Beckmann). Patients were considered to have suffered a perioperative myocardial infarction if they had either symptoms or ECG changes consistent with this diagnosis, together with cTnI release. RESULTS Peak postoperative cTnI concentrations above the lower detection limit of the ACCESS assay (0.06 microg litre(-1)) occurred in 26 patients. Eight of these patients displayed symptoms or ECG changes consistent with myocardial injury. A cTnI level greater than 0.68 microg litre(-1) was found to be consistent with the clinical diagnosis of myocardial infarction. The optimal cut-off for the diagnosis of MI using CK-MB was 40.4 microg litre(-1). CONCLUSIONS These data suggest that further studies are required to define the optimal cardiac troponin diagnostic threshold for the diagnosis of myocardial infarction in the non-cardiac surgery population.
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Affiliation(s)
- S J Howell
- Academic Unit of Anaesthesia, Leeds General Infirmary, Leeds LS1 3EX, UK.
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24
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Watson D, Laurenson IF, Nimmo AF. Anesthesiology. N Engl J Med 1998; 338:685; author reply 686-7. [PMID: 9490386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Abstract
Thoracic impedance (TTI) and rib cage inductance band (IB) signals were measured in 10 patients during the first night after abdominal surgery, and compared by successive correlation of the change in each signal. Poor matching of the signals occurred, on average, for 94 min either because of movement of differences in the waveform. There were frequent episodes of transient poor correlation, generally associated with transient respiratory disturbance, predominantly airway obstruction (58%). Thoracic impedance measurements are simpler than inductance band methods for detecting rib cage movement and may be useful for large studies of respiratory abnormalities in patients after operation.
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Affiliation(s)
- G B Drummond
- Department of Anaesthetics, University of Edinburgh
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26
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Nimmo AF, Drummond GB. Respiratory mechanics after abdominal surgery measured with continuous analysis of pressure, flow and volume signals. Br J Anaesth 1996; 77:317-26. [PMID: 8949802 DOI: 10.1093/bja/77.3.317] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
We studied 10 patients during the first night after upper abdominal surgery to assess the effect of airway obstruction on chest wall mechanics, by recording nasal gas flow and carbon dioxide concentration, rib cage and abdominal dimensions, abdominal muscle activity, and oesophageal and gastric pressures. The mean duration of study of each subject was 5.8 h, and 5.2 h were analysed. The median proportion of time spent breathing with normal mechanics was 29% (interquartile values 0-57%). Abnormal abdominal mechanical events were common and associated with airway obstruction (P < 0.001). Two common patterns of abnormal pressure and movement were found. In the first, abdominal pressure decreased at the onset of inspiration and there was a phase lag in abdominal movement. The incidence was 33 (14-50)%. In the second pattern, abdominal pressure decreased and in addition the abdominal wall moved inwards at the onset of inspiration. This occurred for 34 (0-52)% of the time. Both patterns were associated with evidence of increased activation of the abdominal muscles during expiration, changing the relationship of abdominal and pleural pressure changes and chest wall movements. Such changes have been interpreted previously as evidence of diaphragm dysfunction.
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Affiliation(s)
- A F Nimmo
- University Department of Anaesthetics, Royal Infirmary, Edinburgh
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27
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Armstrong PJ, Morton CP, Nimmo AF. Pethidine has a local anaesthetic action on peripheral nerves in vivo. Addition to prilocaine 0.25% for intravenous regional anaesthesia in volunteers. Anaesthesia 1993; 48:382-6. [PMID: 8317644 DOI: 10.1111/j.1365-2044.1993.tb07008.x] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.7] [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: 01/29/2023]
Abstract
In a double-blind, randomised study, we have examined the effects of the addition of pethidine 100 mg to 40 ml prilocaine 0.25% for intravenous regional anaesthesia in healthy volunteers. During intravenous regional anaesthesia the hand and forearm are isolated from the rest of the circulation and pethidine interaction with central opiate receptors does not occur. Pethidine increased the speed of onset and extent of sensory and motor block, reduced tourniquet and forearm pain, and subjectively improved the quality of the block. Pethidine has local anaesthetic action on peripheral nerves in vivo.
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Affiliation(s)
- P J Armstrong
- Department of Anaesthetics, University of Edinburgh, Royal Infirmary
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