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Onishi K, Yoshida M, Ito H, Kawakami M, Takazawa T. Noradrenaline infusion prevents anesthesia-induced hypotension in severe aortic stenosis patients undergoing transcatheter aortic valve replacement: a retrospective observational study. JA Clin Rep 2024; 10:39. [PMID: 38869688 DOI: 10.1186/s40981-024-00721-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Revised: 05/18/2024] [Accepted: 05/25/2024] [Indexed: 06/14/2024] Open
Abstract
BACKGROUND Patients with severe aortic valve stenosis (AS) are particularly prone to developing hypotension during general anesthesia induction, which increases postoperative morbidity and mortality. Although the preventive effect of a single vasopressor dose on anesthesia-induced hypotension has been reported, the effects of continuous vasopressor infusion are unknown. This study aimed to assess the effect of noradrenaline (NAd) infusion on hemodynamic stability during general anesthesia induction in severe AS patients undergoing transcatheter aortic valve replacement (TAVR). METHODS This single-center, retrospective study included severe AS patients who underwent elective TAVR. Patients in the NAd group received a continuous prophylactic NAd infusion of 0.1 μg/kg/min from the time of anesthesia induction. The control group received inotropes and vasopressors as indicated by the occurrence of hypotension. The primary outcome was the lowest mean blood pressure (MBP) before the start of surgery. RESULTS The study included 68 patients in the NAd group and 113 in the control group. The lowest MBP before the start of surgery was significantly higher in the NAd group than in the control group (63 ± 15 vs 47 ± 13 mmHg, P < 0.01). MBP immediately before intubation was also significantly higher in the NAd group (75 ± 17 vs 57 ± 16 mmHg, P < 0.01). Differences in postoperative complications between the groups were negligible. CONCLUSION Continuous administration of NAd at 0.1 μg/kg/min in patients with severe AS might prevent hypotension during general anesthesia induction for TAVR.
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Affiliation(s)
- Kenta Onishi
- Department of Anesthesiology, University of Toyama, Toyama, Japan.
| | - Masashi Yoshida
- Department of Anesthesiology, University of Toyama, Toyama, Japan
| | - Hisakatsu Ito
- Department of Anesthesiology, University of Toyama, Toyama, Japan
| | - Masaaki Kawakami
- Department of Anesthesiology, University of Toyama, Toyama, Japan
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2
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Hong JT, Park SW. Etomidate versus propofol for sedation in gastrointestinal endoscopy: A systematic review and meta-analysis of outcomes. Medicine (Baltimore) 2023; 102:e32876. [PMID: 36820568 PMCID: PMC9907930 DOI: 10.1097/md.0000000000032876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/12/2023] Open
Abstract
BACKGROUND Propofol is increasingly being used for sedation in gastrointestinal endoscopy; however, owing to its side effects, an alternative drug is needed. We aimed to compare the safety, satisfaction, and efficacy outcomes of etomidate versus propofol in patients undergoing gastrointestinal endoscopy, including advanced endoscopic procedures. METHODS We systematically searched Embase, PubMed, Cochrane Central Register of Controlled Trials, CINAHL (via EBSCO), China National Knowledge Infrastructure, and Web of Science (1946-April 2020) databases for randomized controlled trials of gastrointestinal endoscopy (upper gastrointestinal endoscopy, colonoscopy, and advanced endoscopy) using etomidate or propofol as sedatives. We pooled odds ratios (ORs) for the safety profile and patient and anesthesiologist satisfaction using mixed-effects conditional logistic models and standardized mean differences for efficiency outcomes using random-effects models. RESULTS Twenty-four studies involving 3875 patients were included. Compared with propofol, etomidate resulted in significantly reduced apnea (OR: 0.22; 95% confidence interval [CI]: 0.13-0.37; P < .001), hypoxemia (OR: 0.43; 95% CI: 0.35-0.54; P < .001), hypotension (OR: 0.20; 95% CI: 0.11-0.36; P < .001), and bradycardia (OR: 0.52; 95% CI: 0.30-0.91; P = .02) but led to increased myoclonus (OR: 8.54; 95% CI: 5.20-14.01; P < .001) and lowered anesthesiologist satisfaction (OR: 0.60; 95% CI: 0.39-0.91; P = .02). CONCLUSION Etomidate may be a good alternative to propofol for gastrointestinal endoscopy, especially advanced endoscopy. Etomidate appears to be safe as an inducer for hemodynamically unstable patients or older adult patients undergoing gastrointestinal endoscopy.
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Affiliation(s)
- Ji Taek Hong
- Department of Internal Medicine, Ewha Woman’s University College of Medicine, Seoul, Korea
- * Correspondence: Ji Taek Hong, Department of Internal Medicine, Ewha Woman’s University College of Medicine, Seoul 07985, Korea (e-mail: )
| | - Sung-Wook Park
- Department of Internal Medicine, Nasaret International Hospital, Incheon, Korea
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3
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Carter-Storch R, Hansen SM, Dahl JS, Enevold K, Mogensen NSB, Berg H, Clavel MA, Møller JE. Hemodynamic changes during aortic valve surgery among patients with aortic stenosis. SCAND CARDIOVASC J 2022; 56:276-284. [PMID: 35848519 DOI: 10.1080/14017431.2022.2099008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Introduction. Patients with severe aortic stenosis (AS) undergoing surgery are at increased risk of hypotension and hypoperfusion. Although treatable with inotropic agents or fluid, little is known about how these therapies affect central hemodynamics in AS patients under general anesthesia. We measured changes in central hemodynamics after dobutamine infusion and fluid bolus among patients with severe AS and associated these changes with preoperative echocardiography. Methods. We included 33 patients with severe AS undergoing surgical AVR. After induction of general anesthesia, hemodynamic measurements were obtained with a pulmonary artery catheter, including Cardiac index (CI), stroke volume index (SVi) and pulmonary capillary wedge pressure (PCWP). Measurements were repeated during dobutamine infusion, after fluid bolus and lastly after sternotomy. Results. General anesthesia resulted in a decrease in CI and SVi compared to preoperative values. During dobutamine infusion CI increased but mean SVi did not (38 ± 12 vs 37 ± 13 ml/m2, p = .90). Higher EF and SVi before surgery and a larger decrease in SVi after induction of general anesthesia were associated with an increase in SVi during dobutamine infusion. After fluid bolus both CI, SVi (48 ± 12 vs 37 ± 13 ml/min/m2, p < .0001) and PCWP increased. PCWP increased mostly among patients with a larger LA volume index. Conclusion. In patients with AS, CI can be increased with both dobutamine and fluid during surgery. Dobutamine's effect on SVI was highly variable and associated with baseline LVEF, and an increase in CI was mostly driven by an increase in heart rate. Fluid increased SVi at the cost of an increase in PCWP.
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Affiliation(s)
- Rasmus Carter-Storch
- Department of Cardiology, Odense University Hospital, Odense, Denmark.,Institut Universitaire de Cardiologie et de Pneumologie de Quebec/Quebec Heart and Lung University Institute, Université Laval, Quebec City, Canada
| | | | - Jordi S Dahl
- Department of Cardiology, Odense University Hospital, Odense, Denmark
| | - Kasper Enevold
- OPEN Odense Patient Data Explorative Network, Odense, Denmark
| | | | - Henrik Berg
- OPEN Odense Patient Data Explorative Network, Odense, Denmark
| | - Marie-Annick Clavel
- Department of Anesthesiology and Intensive Care, Odense University Hospital, Odense, Denmark
| | - Jacob E Møller
- Department of Cardiology, Odense University Hospital, Odense, Denmark.,Institut Universitaire de Cardiologie et de Pneumologie de Quebec/Quebec Heart and Lung University Institute, Université Laval, Quebec City, Canada
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4
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Russotto V, Tassistro E, Myatra SN, Parotto M, Antolini L, Bauer P, Lascarrou JB, Szułdrzyński K, Camporota L, Putensen C, Pelosi P, Sorbello M, Higgs A, Greif R, Pesenti A, Valsecchi MG, Fumagalli R, Foti G, Bellani G, Laffey JG. Peri-intubation Cardiovascular Collapse in Patients Who Are Critically Ill: Insights from the INTUBE Study. Am J Respir Crit Care Med 2022; 206:449-458. [PMID: 35536310 DOI: 10.1164/rccm.202111-2575oc] [Citation(s) in RCA: 46] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Rationale: Cardiovascular instability/collapse is a common peri-intubation event in patients who are critically ill. Objectives: To identify potentially modifiable variables associated with peri-intubation cardiovascular instability/collapse (i.e., systolic arterial pressure <65 mm Hg [once] or <90 mm Hg for >30 minutes; new/increased vasopressor requirement; fluid bolus >15 ml/kg, or cardiac arrest). Methods: INTUBE (International Observational Study to Understand the Impact and Best Practices of Airway Management In Critically Ill Patients) was a multicenter prospective cohort study of patients who were critically ill and undergoing tracheal intubation in a convenience sample of 197 sites from 29 countries across five continents from October 1, 2018, to July 31, 2019. Measurements and Main Results: A total of 2,760 patients were included in this analysis. Peri-intubation cardiovascular instability/collapse occurred in 1,199 out of 2,760 patients (43.4%). Variables associated with this event were older age (odds ratio [OR], 1.02; 95% confidence interval [CI], 1.02-1.03), higher heart rate (OR, 1.008; 95% CI, 1.004-1.012), lower systolic blood pressure (OR, 0.98; 95% CI, 0.98-0.99), lower oxygen saturation as measured by pulse oximetry/FiO2 before induction (OR, 0.998; 95% CI, 0.997-0.999), and the use of propofol as an induction agent (OR, 1.28; 95% CI, 1.05-1.57). Patients with peri-intubation cardiovascular instability/collapse were at a higher risk of ICU mortality with an adjusted OR of 2.47 (95% CI, 1.72-3.55), P < 0.001. The inverse probability of treatment weighting method identified the use of propofol as the only factor independently associated with cardiovascular instability/collapse (OR, 1.23; 95% CI, 1.02-1.49). When administered before induction, vasopressors (OR, 1.33; 95% CI, 0.84-2.11) or fluid boluses (OR, 1.17; 95% CI, 0.96-1.44) did not reduce the incidence of cardiovascular instability/collapse. Conclusions: Peri-intubation cardiovascular instability/collapse was associated with an increased risk of both ICU and 28-day mortality. The use of propofol for induction was identified as a modifiable intervention significantly associated with cardiovascular instability/collapse.Clinical trial registered with clinicaltrials.gov (NCT03616054).
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Affiliation(s)
- Vincenzo Russotto
- Department of Anesthesia and Critical Care, University Hospital San Luigi Gonzaga, University of Turin, Italy
| | - Elena Tassistro
- Bicocca Center of Bioinformatics, Biostatistics and Bioimaging (B4 center) and.,School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
| | - Sheila N Myatra
- Department of Anaesthesiology, Critical Care and Pain, Tata Memorial Hospital, Homi Bhabha National Institute, Mumbai, India
| | - Matteo Parotto
- Department of Anesthesiology and Pain Medicine, Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Ontario, Canada.,Department of Anesthesia and Pain Management, Toronto General Hospital, Toronto, Ontario, Canada
| | - Laura Antolini
- Bicocca Center of Bioinformatics, Biostatistics and Bioimaging (B4 center) and.,School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
| | - Philippe Bauer
- Division of Pulmonary and Critical Care Medicine, Mayo Clinic, Rochester, Minnesota
| | | | - Konstanty Szułdrzyński
- Department of Anesthesiology and Intensive Care, Central Clinical Hospital of the Ministry of Interior and Administration, Warsaw, Poland.,Faculty of Medicine, Jagiellonian University Medical College, Krakow, Poland
| | - Luigi Camporota
- Health Centre for Human and Applied Physiological Sciences, Department of Adult Critical Care, Guy's and St. Thomas' National Health Service Foundation Trust, London, United Kingdom
| | - Christian Putensen
- Department of Anesthesiology and Intensive Care Medicine, University Hospital Bonn, Bonn, Germany
| | - Paolo Pelosi
- Anesthesia and Intensive Care, San Martino Policlinico Hospital, Istituto di Ricovero e Cura a Carattere Scientifico per l'Oncologia e le Neuroscienze, Genoa, Italy.,Department of Surgical Sciences and Integrated Diagnostics, University of Genoa, Genoa, Italy
| | - Massimiliano Sorbello
- Anesthesia and Intensive Care, Policlinico Vittorio Emanuele San Marco University Hospital, Catania, Italy
| | - Andy Higgs
- Anaesthesia and Intensive Care Medicine, Warrington & Halton Teaching Hospitals National Health Service Foundation Trust, Warrington, United Kingdom
| | - Robert Greif
- Department of Anaesthesiology and Pain Therapy, Bern University Hospital, University of Bern, Bern, Switzerland.,School of Medicine, Sigmund Freud University Vienna, Vienna, Austria
| | - Antonio Pesenti
- Dipartimento di Anestesia, Rianimazione ed Emergenza-Urgenza, Fondazione Istituto di Ricovero e Cura a Carattere Scientifico Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Maria Grazia Valsecchi
- Bicocca Center of Bioinformatics, Biostatistics and Bioimaging (B4 center) and.,School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy
| | - Roberto Fumagalli
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy.,Department of Anesthesiology, Azienda Socio Sanitaria Territoriale Grande Ospedale Metropolitano Niguarda, Milan, Italy
| | - Giuseppe Foti
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy.,Department of Emergency and Intensive Care, University Hospital San Gerardo, Monza, Italy
| | - Giacomo Bellani
- School of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy.,Department of Emergency and Intensive Care, University Hospital San Gerardo, Monza, Italy
| | - John G Laffey
- Regenerative Medicine Institute at CURAM Centre for Medical Devices, School of Medicine, National University of Ireland Galway, Galway, Ireland; and.,Anesthesia and Intensive Care Medicine, University Hospital Galway, Galway, Ireland
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Qiu Y, Gu W, Zhao M, Zhang Y, Wu J. The hemodynamic stability of remimazolam compared with propofol in patients undergoing endoscopic submucosal dissection: A randomized trial. Front Med (Lausanne) 2022; 9:938940. [PMID: 36004376 PMCID: PMC9394743 DOI: 10.3389/fmed.2022.938940] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Accepted: 07/12/2022] [Indexed: 11/13/2022] Open
Abstract
ObjectiveHypotension is common in propofol anesthesia. Whether remimazolam could reduce intraoperative hypotension remains unknown. We therefore tested the primary hypothesis that remimazolam reduces the incidence of intraoperative hypotension compared with propofol in adult patients undergoing endoscopic submucosal dissection (ESD) surgery.Materials and methodsWe conducted a prospective trial to compare patients who received either remimazolam or propofol bolus induction and thereafter intravenous infusion. The hemodynamic parameters were measured using CNAP® Monitor 500 system. Our primary analysis was to compare the incidence of hypotension defined as systolic blood pressure below 90 mmHg between remimazolam and propofol during the whole anesthesia period.ResultsThe incidence of hypotension decreased by 50%, from 67.9% in propofol group to 32.1% in remimazolam group (p < 0.01). Patients received less amount of intraoperative phenylephrine in the remimazolam group than the propofol group (0 [0–40] μg vs. 80 [0–200] μg, p < 0.01). Time-weighted average and cumulative time of hypotension was lower in remimazolam group compared with propofol group (p < 0.05). Cardiac output continuously measured by CNAP was preserved much better in remimazolam group compared with propofol group (p = 0.01), while systemic vascular resistance did not differ between the groups. The median time from discontinuation until full alertness was 4 [3–11.8] min in the remimazolam group compared with 15 [12.0–19.8] min in the propofol group (p < 0.01).ConclusionRemimazolam has better hemodynamic stability than propofol in adult patients undergoing ESD surgery. The benefits of remimazolam on hemodynamic stability and hypotension prevention may be partly contributed to its better preservation of cardiac output.Clinical Trial Registration[http://www.chictr.org.cn/com/25/showproj.aspx?proj=61104], identifier [ChiCTR2000037975].
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Affiliation(s)
- Yuwei Qiu
- Department of Anesthesiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China
- Outcomes Research Consortium, Cleveland, OH, United States
| | - Wei Gu
- Department of Anesthesiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Mingye Zhao
- Department of Anesthesiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Yunyun Zhang
- Department of Anesthesiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Jingxiang Wu
- Department of Anesthesiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China
- Outcomes Research Consortium, Cleveland, OH, United States
- *Correspondence: Jingxiang Wu,
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6
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Nakanishi T, Sento Y, Kamimura Y, Tsuji T, Kako E, Sobue K. Remimazolam for induction of anesthesia in elderly patients with severe aortic stenosis: a prospective, observational pilot study. BMC Anesthesiol 2021; 21:306. [PMID: 34872518 PMCID: PMC8647449 DOI: 10.1186/s12871-021-01530-3] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Accepted: 11/26/2021] [Indexed: 11/17/2022] Open
Abstract
Background Remimazolam, a novel benzodiazepine, has been reported to cause less hypotension than propofol during induction of anesthesia. Therefore, remimazolam might be a valuable option in elderly patients with severe aortic stenosis who are considered to be the most vulnerable to hemodynamic instability. We aimed to evaluate the feasibility and hemodynamic effects of remimazolam as an induction agent in elderly patients with severe aortic stenosis. Methods This prospective, open-label, single-arm, observational pilot study was conducted in a university hospital between November 2020 and April 2021. We included 20 patients aged 65 years or older scheduled for transcatheter or surgical aortic valve replacement for severe aortic stenosis under general anesthesia. Patients were administered intravenous remimazolam infusion at 6 mg/kg/h combined with 0.25 μg/kg/min of remifentanil infusion. The primary outcome was the vasopressor dosage between the induction of anesthesia and the completion of tracheal intubation. The secondary outcomes included hemodynamic changes, bispectral index changes, and the time from the start of remimazolam infusion to loss of consciousness. We also recorded awareness during anesthesia induction and serious adverse events related to death, life-threatening events, prolonged hospitalizations, and disability due to permanent damage. Results Twenty patients aged 84 [79–86] (median [interquartile range]) with American Society of Anesthesiologists physical status 4 were analyzed. Ephedrine 0 [0–4] mg and phenylephrine 0.1 [0–0.1] mg were administered to 14/20 patients (3 doses in 1 patient, 2 doses in 4 patients, and one dose in 9 patients). Loss of consciousness was achieved at 80 [69–86] s after the remimazolam infusion was started. The mean arterial pressure decreased gradually after loss of consciousness but recovered immediately after tracheal intubation. The bispectral index values gradually decreased and reached < 60 at 120 s after loss of consciousness. Neither awareness during induction of anesthesia nor serious adverse events, such as severe bradycardia (< 40 bpm), life-threatening arrhythmia, myocardial ischemia, or anaphylactic reactions were observed. Conclusions Remimazolam could be used as an induction agent with timely bolus vasopressors in elderly patients with severe aortic stenosis. Trial registration UMIN Clinical Trials Registry, identifier UMIN000042318.
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Affiliation(s)
- Toshiyuki Nakanishi
- Department of Anesthesiology and Intensive Care Medicine, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Japan.
| | - Yoshiki Sento
- Department of Anesthesiology and Intensive Care Medicine, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Japan
| | - Yuji Kamimura
- Department of Anesthesiology and Intensive Care Medicine, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Japan
| | - Tatsuya Tsuji
- Department of Anesthesiology and Intensive Care Medicine, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Japan
| | - Eisuke Kako
- Department of Anesthesiology and Intensive Care Medicine, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Japan
| | - Kazuya Sobue
- Department of Anesthesiology and Intensive Care Medicine, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Japan
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7
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Furuta M, Ito H, Yamazaki M. Anaesthetic management using remimazolam in a patient with severe aortic stenosis: a case report. BMC Anesthesiol 2021; 21:202. [PMID: 34391395 PMCID: PMC8364063 DOI: 10.1186/s12871-021-01422-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Accepted: 07/19/2021] [Indexed: 02/06/2023] Open
Abstract
Background The administration of general anaesthesia in patients with aortic stenosis (AS) requires careful attention to haemodynamics. We used remimazolam for the induction and maintenance of anaesthesia in a woman with severe AS undergoing a total mastectomy. Case presentation An 81-year-old woman with severe AS was scheduled to undergo a total mastectomy. We decided to administer total intravenous anaesthesia with remimazolam to minimize haemodynamic changes. Although the patient showed transient hypotension after anaesthesia induction, the cardiac index was preserved with a low dose of continuous noradrenaline. The anaesthesia was then safely maintained without a decrease in the patient’s cardiac index. Conclusions General anaesthesia using remimazolam preserved cardiac output in this patient; therefore, remimazolam can be safely used to avoid the risk of cardiac suppression in patients with severe AS.
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Affiliation(s)
- Minako Furuta
- Department of Anaesthesiology, Toyama University Hospital, 2630 Sugitani, Toyama, 930-0194, Japan.
| | - Hisakatsu Ito
- Department of Anaesthesiology, Toyama University Hospital, 2630 Sugitani, Toyama, 930-0194, Japan
| | - Mitsuaki Yamazaki
- Department of Anaesthesiology, Toyama University Hospital, 2630 Sugitani, Toyama, 930-0194, Japan
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Liu T, Lai T, Chen J, Lu Y, He F, Chen Y, Xie Y. Effect of remimazolam induction on hemodynamics in patients undergoing valve replacement surgery: A randomized, double-blind, controlled trial. Pharmacol Res Perspect 2021; 9:e00851. [PMID: 34390228 PMCID: PMC8363771 DOI: 10.1002/prp2.851] [Citation(s) in RCA: 65] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 07/24/2021] [Accepted: 07/26/2021] [Indexed: 12/11/2022] Open
Abstract
Background The stability of hemodynamics during anesthesia induction in patients undergoing valve replacement surgery is particularly important. Remimazolam is a new type of benzodiazepine drug, with supposed advantages of rapid induction, rapid recovery, stable hemodynamics, and mild respiratory inhibition. Aim To evaluate the effect of remimazolam anesthesia induction on hemodynamics in patients undergoing valve replacement surgery. Methods This randomized, double‐blind, controlled trial enrolled consecutive patients undergoing mitral valve replacement (MVR)/aortic valve replacement (AVR)/double‐valve replacement (DVR) surgery on cardiopulmonary bypass (CPB). The study was conducted according to the Consolidated Standards of Reporting Trials statement. Participants were randomly assigned to receive either remimazolam or propofol induction of 30 patients each. All patients, data collectors, and data analyzers were blinded to the group allocation. The primary outcomes were the fluctuations in hemodynamic parameters (the difference of maximum or minimum heart rate to baseline, ▲HR, the difference of maximum or minimum mean arterial pressure to baseline, ▲MAP), the occurrence of cardiovascular events (hypotension, severe bradycardia), and the cumulative norepinephrine doses used per patient, averaged per group during induction. The secondary outcomes were hemodynamic parameters (heart rate, HR, mean arterial pressure, MAP, bispectral index, BIS, plasma lactic acid, Lac, and blood glucose, Glu values). Results A total of 60 patients with heart valve replacement were included in the final analysis, with 30 patients in each group. The ▲MAP was significantly lower in the remimazolam group than in the propofol group during induction (p < .05). The incidences of hypotension and the cumulative norepinephrine doses used per patient, averaged per group during induction were significantly lower in the remimazolam group than in the propofol group (p < .05). Conclusion Remimazolam may be safe and effective for induction and may as an alternative to propofol during anesthesia induction in patients undergoing valve replacement surgery.
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Affiliation(s)
- Tianxiao Liu
- Department of Anesthesiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Ting Lai
- Department of Anesthesiology, Cardiovascular Institute, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Jing Chen
- Department of Anesthesiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Yizhi Lu
- Department of Anesthesiology, Cardiovascular Institute, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Fang He
- Department of Anesthesiology, Cardiovascular Institute, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Yanhua Chen
- Department of Anesthesiology, Cardiovascular Institute, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Yubo Xie
- Department of Anesthesiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
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Ladha S, Prakash A. CON: Propofol Is Better Than Etomidate for Induction in Cardiac Surgical Patients. JOURNAL OF CARDIAC CRITICAL CARE TSS 2021. [DOI: 10.1055/s-0041-1728957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
AbstractThere is an ongoing debate regarding the choice of ideal induction agent between propofol and etomidate for cardiac surgical patients. Etomidate appears to be better than propofol as the induction agent due to the superior hemodynamic stability. However, the adrenal suppression due to etomidate can pose challenges to the anesthesiologist in certain clinical situations.
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Affiliation(s)
- Suruchi Ladha
- Department of Cardiac Anaesthesia, National Heart Institute 49-50, Community Centre, New Delhi, India
| | - Arvind Prakash
- Department of Cardiac Anaesthesia, National Heart Institute 49-50, Community Centre, New Delhi, India
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10
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Yao YT, He LX, Fang NX, Ma J. Anesthetic Induction With Etomidate in Cardiac Surgical Patients: A PRISMA-Compliant Systematic Review and Meta-Analysis. J Cardiothorac Vasc Anesth 2020; 35:1073-1085. [PMID: 33384231 DOI: 10.1053/j.jvca.2020.11.068] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 11/28/2020] [Accepted: 11/30/2020] [Indexed: 01/10/2023]
Abstract
OBJECTIVE This meta-analysis aimed to systematically review the effects of etomidate (ETM) during anesthetic induction on patients undergoing cardiac surgery. DESIGN Systematic review and meta-analysis. SETTING Operating room. PARTICIPANTS Patients undergoing cardiac surgery. INTERVENTIONS ETM or control drugs. MEASUREMENTS AND MAIN RESULTS PubMed, Cochrane Library, OVID, and EMBASE were searched through August 31, 2020. Primary outcomes included hemodynamic profiles and stress responses. Secondary outcomes included morbidity, mortality, and postoperative recovery. For continuous/dichotomous variables, treatment effects were calculated as weighted mean difference (WMD)/odds ratio (OR) and 95% confidence interval (CI). A database search yielded 18 randomized controlled trials including 1,241 patients. The present meta-analysis demonstrated that ETM-anesthetized patients had lower heart rates (WMD, -3.31; 95% CI -5.43 to -1.19; p = 0.002), higher blood pressures (systolic blood pressure: WMD, 12.02; 95% CI 6.24 to 17.80; p < 0.0001; diastolic blood pressure: WMD, 5.23; 95% CI 2.39 to 8.08; p = 0.0003; mean arterial pressure (MAP): WMD, 8.64; 95% CI 5.85 to 11.43; p < 0.00001), less requirement for vasopressor (OR, 0.26; 95% CI 0.15 to 0.44; p < 0.00001), and more nitroglycerin usage (OR, 14.89; 95% CI 4.92 to 45.08; p < 0.00001) during anesthetic induction. Current meta-analysis also demonstrated that single-dose ETM lowered cortisol levels transiently and did not have a significant effect on endogenous norepinephrine and epinephrine levels and was not associated with increased postoperative inotrope and/or vasopressor requirement. Additionally, the meta-analysis suggested that ETM anesthesia was associated with neither increased mortality nor morbidity, except a higher incidence of transient adrenal insufficiency in ETM recipients. CONCLUSION The present meta-analysis suggested that single-dose ETM during anesthetic induction could be associated with more stable hemodynamics, transient and reversible lower cortisol levels, and a higher adrenal insufficiency incidence, but not worse outcomes in cardiac surgical patients.
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Affiliation(s)
- Yun-Tai Yao
- Department of Anesthesiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China.
| | - Li-Xian He
- Department of Anesthesiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
| | - Neng-Xin Fang
- Department of Anesthesiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
| | - Jie Ma
- Department of Pharmacy, Fuwai Hospital, National Center for Cardiovascular Diseases, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
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Savoca A, van Heusden K, Manca D, Ansermino JM, Dumont GA. The effect of cardiac output on the pharmacokinetics and pharmacodynamics of propofol during closed-loop induction of anesthesia. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2020; 192:105406. [PMID: 32155533 DOI: 10.1016/j.cmpb.2020.105406] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 01/31/2020] [Accepted: 02/17/2020] [Indexed: 06/10/2023]
Abstract
BACKGROUND AND OBJECTIVE Intraoperative hemodynamic stability is essential to safety and post-operative well-being of patients and should be optimized in closed-loop control of anesthesia. Cardiovascular changes inducing variations in pharmacokinetics may require dose modification. Rigorous investigational tools can strengthen current knowledge of the anesthesiologists and support clinical practice. We quantify the cardiovascular response of high-risk patients to closed-loop anesthesia and propose a new application of physiologically-based pharmacokinetic-pharmacodynamic (PBPK-PD) simulations to examine the effect of hemodynamic changes on the depth of hypnosis (DoH). METHODS We evaluate clinical hemodynamic changes in response to anesthesia induction in high-risk patients from a study on closed-loop anesthesia. We develop and validate a PBPK-PD model to simulate the effect of changes in cardiac output (CO) on plasma levels and DoH. The wavelet-based anesthetic value for central nervous system monitoring index (WAVCNS) is used as clinical end-point of propofol hypnotic effect. RESULTS The median (interquartile range, IQR) changes in CO and arterial pressure (AP), 3 min after induction of anesthesia, are 22.43 (14.82-36.0) % and 26.60 (22.39-35.33) % respectively. The decrease in heart rate (HR) is less marked, i.e. 8.82 (4.94-12.68) %. The cardiovascular response is comparable or less enhanced than in manual propofol induction studies. PBPK simulations show that the marked decrease in CO coincides with high predicted plasma levels and deep levels of hypnosis, i.e. WAVCNS < 40. PD model identification is improved using the PBPK model rather than a standard three-compartment PK model. PD simulations reveal that a 30% drop in CO can cause a 30% change in WAVCNS. CONCLUSIONS Significant CO drops produce increased predicted plasma concentrations corresponding to deeper anesthesia, which is potentially dangerous for elderly patients. PBPK-PD model simulations allow studying and quantifying these effects to improve clinical practice.
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Affiliation(s)
- A Savoca
- PSE-Lab, Process Systems Engineering Laboratory, Dipartimento di Chimica, Materiali e Ingegneria Chimica "Giulio Natta", Politecnico di Milano, Piazza Leonardo da Vinci 32, Milano 20133, Italy
| | - K van Heusden
- Department of Electrical & Computer Engineering, The University of British Columbia, Vancouver, British Columbia, Canada
| | - D Manca
- PSE-Lab, Process Systems Engineering Laboratory, Dipartimento di Chimica, Materiali e Ingegneria Chimica "Giulio Natta", Politecnico di Milano, Piazza Leonardo da Vinci 32, Milano 20133, Italy.
| | - J M Ansermino
- Department of Anesthesiology, Pharmacology & Therapeutics, The University of British Columbia, Vancouver, British Columbia, Canada
| | - G A Dumont
- Department of Electrical & Computer Engineering, The University of British Columbia, Vancouver, British Columbia, Canada; Department of Anesthesiology, Pharmacology & Therapeutics, The University of British Columbia, Vancouver, British Columbia, Canada
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Difficult Intubation due to Penetrating Trauma from a Crossbow Bolt. Air Med J 2020; 39:300-302. [PMID: 32690309 DOI: 10.1016/j.amj.2020.03.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2020] [Accepted: 03/26/2020] [Indexed: 12/11/2022]
Abstract
We present the case of a patient with penetrating neck and craniofacial trauma from a self-inflicted crossbow bolt injury. This case highlights the challenges involved in prehospital airway management related to an in situ foreign object penetrating the oral cavity. We review the complications associated with such injuries and considerations for effective prehospital airway management.
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Zheng H, Zhu Y, Chen K, Shen X. The effect of etomidate or propofol on brainstem function during anesthesia induction: a bispectral index-guided study. DRUG DESIGN DEVELOPMENT AND THERAPY 2019; 13:1941-1946. [PMID: 31239644 PMCID: PMC6559222 DOI: 10.2147/dddt.s211523] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Accepted: 05/21/2019] [Indexed: 12/23/2022]
Abstract
Purpose To compare the effect of etomidate versus propofol infusion on hemodynamic profiles, spontaneous breathing, and corneal reflex during the induction of anesthesia. Methods Adult patients (n=80) were randomized to receive etomidate (Group E, n=40) or propofol (Group P, n=40) infusion during anesthesia induction. Throughout induction, mean blood pressure and heart rate were monitored. Time to loss of consciousness (LOC), bispectral index (BIS), existence of spontaneous breathing, and corneal reflex at LOC were recorded. Results Fewer changes in hemodynamic profile occurred in Group E compared with Group P during induction of anesthesia. The mean time to LOC was shorter with etomidate than propofol (129.5 s vs 189.5 s, P<0.0001). BIS was lower in Group E compared with Group P at LOC (46.3 vs 52.9, P=0.0141). More patients exhibited spontaneous breathing in Group E compared with Group P at LOC (80% vs 17.5%, P<0.0001). Similarly, more patients maintained corneal reflex in Group E compared with Group P (34 patients vs 4 patients, P<0.0001). The incidence of etomidate-induced myoclonus was 17.5%. Conclusion Compared with propofol infusion, etomidate infusion during anesthesia induction had fewer effects on the hemodynamic profile of patients. Among patients who received etomidate, the BIS value was lower at LOC, and more patients displayed spontaneous breathing and corneal reflex. Trial Registry Number China Clinical Research Information Service, ChiCTR-IOR-17011050
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Affiliation(s)
- Huibao Zheng
- Department of Anesthesiology, The Eye, Ear, Nose and Throat Hospital of Fudan University, Shanghai Medical College of Fudan University, Shanghai, People's Republic of China
| | - Yuexin Zhu
- Department of Anesthesiology, The Eye, Ear, Nose and Throat Hospital of Fudan University, Shanghai Medical College of Fudan University, Shanghai, People's Republic of China
| | - Kaizheng Chen
- Department of Anesthesiology, The Eye, Ear, Nose and Throat Hospital of Fudan University, Shanghai Medical College of Fudan University, Shanghai, People's Republic of China
| | - Xia Shen
- Department of Anesthesiology, The Eye, Ear, Nose and Throat Hospital of Fudan University, Shanghai Medical College of Fudan University, Shanghai, People's Republic of China
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Hannam J, Mitchell S, Cumin D, Frampton C, Merry A, Moore M, Kruger C. Haemodynamic profiles of etomidate vs propofol for induction of anaesthesia: a randomised controlled trial in patients undergoing cardiac surgery. Br J Anaesth 2019; 122:198-205. [DOI: 10.1016/j.bja.2018.09.027] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 08/28/2018] [Accepted: 09/21/2018] [Indexed: 11/25/2022] Open
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Schenone AL, Chen K, Andress K, Militello M, Cho L. Editor’s Choice- Sedation in the coronary intensive care unit: An adapted algorithm for critically ill cardiovascular patient. EUROPEAN HEART JOURNAL-ACUTE CARDIOVASCULAR CARE 2018; 8:167-175. [DOI: 10.1177/2048872617753797] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
In the current era, cardiovascular intensive care units care for more complex patients who are far sicker than historical post-myocardial infarction patients, and sedation has become a common intervention in these units. Current sedation best practices derive mainly from non-cardiac units which limits their generalization to the critically ill cardiac patient. Thus, a great variability in sedation protocols, especially the selection of sedative agents, is commonly seen in daily practice across cardiac units. We present an updated review on sedation in cardiovascular critical care medicine with emphasis on the hemodynamic impact. The goal of this review is to generate a general sedation algorithm specific for the cardiac patient.
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Affiliation(s)
- AL Schenone
- Department of Cardiovascular Medicine, Cleveland Clinic, USA
| | - K Chen
- Internal Medicine Department, Cleveland Clinic, USA
| | - K Andress
- Internal Medicine Department, Cleveland Clinic, USA
| | | | - L Cho
- Department of Cardiovascular Medicine, Cleveland Clinic, USA
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Anaesthetic induction with etomidate in cardiac surgery: A randomised controlled trial. Eur J Anaesthesiol 2018; 33:417-24. [PMID: 26914224 DOI: 10.1097/eja.0000000000000434] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
BACKGROUND Etomidate is perceived as preserving haemodynamic stability during induction of anaesthesia. It is also associated with adrenocortical dysfunction. The risk/benefit relationship is controversial. OBJECTIVES We tested the hypotheses that single-dose etomidate increases cumulative vasopressor requirement, time to extubation and length of stay in the ICU. DESIGN Double-blind randomised controlled trial. SETTING Bern University Hospital, Switzerland, from November 2006 to December 2009. PATIENTS There were 90 patients undergoing coronary artery bypass grafts (CABG) and 40 patients undergoing mitral valve surgery (MVS). Reasons for noninclusion were known adrenocortical insufficiency, use of etomidate or propofol within 1 week preoperatively, use of glucocorticoids within 6 months preoperatively, severe renal or liver dysfunction, or carotid stenosis. INTERVENTIONS CABG patients were allocated randomly to receive either etomidate 0.15 mg kg with placebo, propofol 1.5 mg kg with placebo or etomidate 0.15 mg kg with hydrocortisone (n = 30 in each arm). Risk stratification (low vs. high) was achieved by block randomisation. MVS patients received either etomidate 0.15 mg kg or propofol 1.5 mg kg (n = 20 in each arm). MAIN OUTCOME MEASURES Cumulative vasopressor requirements, incidence of adrenocortical insufficiency, length of time to extubation and length of stay in ICU. RESULTS Cumulative vasopressor requirements 24 h after induction did not differ between treatments in patients who underwent CABG, whereas more noradrenaline was used in MVS patients following propofol induction (absolute mean difference 5.86 μg kg over 24 h P = 0.047). The incidence of relative adrenocortical insufficiency was higher after etomidate alone than propofol (CABG 83 vs. 37%, P < 0.001; MVS: 95 vs. 35%, P < 0.001). The time to extubation, length of stay in ICU and 30-day mortality did not differ among treatments. Within low and high-risk subgroups, no differences in vasopressor use or outcomes were found. CONCLUSION In elective cardiac surgery, laboratory indicators of etomidate-induced adrenal insufficiency do not translate into increased vasopressor requirement or inferior early outcomes. TRIAL REGISTRATION ClinicalTrials.gov Identifier: NCT 00415701.
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Kim MG, Park SW, Kim JH, Lee J, Kae SH, Jang HJ, Koh DH, Choi MH. Etomidate versus propofol sedation for complex upper endoscopic procedures: a prospective double-blinded randomized controlled trial. Gastrointest Endosc 2017; 86:452-461. [PMID: 28284883 DOI: 10.1016/j.gie.2017.02.033] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Accepted: 02/23/2017] [Indexed: 02/07/2023]
Abstract
BACKGROUND AND AIMS Although a growing body of evidence demonstrates that propofol-induced deep sedation can be effective and performed safely, cardiopulmonary adverse events have been observed frequently. Etomidate is a new emerging drug that provides hemodynamic and respiratory stability, even in high-risk patient groups. The objective of this study was to compare safety and efficacy profiles of etomidate and propofol for endoscopic sedation. METHODS A total of 128 patients undergoing EUS were randomized to receive either etomidate or propofol blinded administered by a registered nurse. The primary outcome was the proportion of patients with any cardiopulmonary adverse events. RESULTS Overall cardiopulmonary adverse events were identified in 22 patients (34.38%) of the etomidate group and 33 patients (51.56%) of the propofol group, without significant difference (P = .074). However, the incidence of oxygen desaturation (4/64 [6.25%] vs 20/64 [31.25%]; P =.001) and respiratory depression (5/64 [7.81%] vs 21/64 [32.81%]; P =.001) was significantly lower in the etomidate group than in the propofol group. The frequency of myoclonus was significantly higher in the etomidate group (22/64 [34.37%]) compared with the propofol group (8/64 [12.50%]) (P =.012). Repeated measure analysis of variance revealed significant effects of sedation group and time on systolic blood pressure (etomidate group greater than propofol group). Physician satisfaction was greater in the etomidate group than in the propofol group. CONCLUSIONS Etomidate administration resulted in fewer respiratory depression events and had a better sedative efficacy than propofol; however, it was more frequently associated with myoclonus and increased blood pressure during endoscopic procedures. (Clinical trial registration number: KCT0001701.).
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Affiliation(s)
- Mi Gang Kim
- Division of Gastroenterology, Department of Internal Medicine, Hallym University Dongtan Sacred Heart Hospital, Hallym University College of Medicine, Gyeonggi-do, Korea
| | - Se Woo Park
- Division of Gastroenterology, Department of Internal Medicine, Hallym University Dongtan Sacred Heart Hospital, Hallym University College of Medicine, Gyeonggi-do, Korea
| | - Jae Hyun Kim
- Division of Gastroenterology, Department of Internal Medicine, Hallym University Dongtan Sacred Heart Hospital, Hallym University College of Medicine, Gyeonggi-do, Korea
| | - Jin Lee
- Division of Gastroenterology, Department of Internal Medicine, Hallym University Dongtan Sacred Heart Hospital, Hallym University College of Medicine, Gyeonggi-do, Korea
| | - Sea Hyub Kae
- Division of Gastroenterology, Department of Internal Medicine, Hallym University Dongtan Sacred Heart Hospital, Hallym University College of Medicine, Gyeonggi-do, Korea
| | - Hyun Joo Jang
- Division of Gastroenterology, Department of Internal Medicine, Hallym University Dongtan Sacred Heart Hospital, Hallym University College of Medicine, Gyeonggi-do, Korea
| | - Dong Hee Koh
- Division of Gastroenterology, Department of Internal Medicine, Hallym University Dongtan Sacred Heart Hospital, Hallym University College of Medicine, Gyeonggi-do, Korea
| | - Min Ho Choi
- Division of Gastroenterology, Department of Internal Medicine, Hallym University Dongtan Sacred Heart Hospital, Hallym University College of Medicine, Gyeonggi-do, Korea
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Abstract
BACKGROUND Etomidate potently suppresses adrenocortical steroid synthesis with potentially deleterious consequences by binding to 11β-hydroxylase and inhibiting its function. The authors hypothesized that other sedative-hypnotics currently in clinical use or under development (or their metabolites) might bind to the same site at clinically relevant concentrations. The authors tested this hypothesis by defining etomidate's affinity for this site and the potencies with which other sedative-hypnotics (and their metabolites) inhibit etomidate binding. METHODS H-etomidate's binding to adrenal membranes from Sprague-Dawley rats was characterized with a filtration assay, and its dissociation constant was defined using saturation and homologous ligand competition approaches. Half-inhibitory concentrations of sedative-hypnotics and metabolites were determined from the reduction in specific H-etomidate binding measured in the presence of ranging sedative-hypnotic and metabolite concentrations. RESULTS Saturation and homologous competition studies yielded H-etomidate dissociation constants of 40 and 21 nM, respectively. Half-inhibitory concentrations of etomidate and cyclopropyl methoxycarbonyl metomidate (CPMM) differed significantly (26 vs. 143 nM, respectively; P < 0.001), and those of the carboxylic acid (CA) metabolites etomidate-CA and CPMM-CA were greater than or equal to 1,000× higher than their respective parent hypnotics. The half-inhibitory concentration of dexmedetomidine was 2.2 µM, whereas those of carboetomidate, ketamine, and propofol were greater than or equal to 50 µM. CONCLUSION Etomidate's in vitro dissociation constant for 11β-hydroxylase closely approximates its in vivo adrenocortical half-inhibitory concentration. CPMM produces less adrenocortical suppression than etomidate not only because it is metabolized faster but also because it binds to 11β-hydroxylase with lower affinity. Other sedative-hypnotics and metabolites bind to 11β-hydroxylase and inhibit etomidate binding only at suprahypnotic concentrations.
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Komatsu R, Makarova N, You J, Sessler DI, Anthony DG, Kasuya Y, Soltesz EG, Turan A. Etomidate and the Risk of Complications After Cardiac Surgery: A Retrospective Cohort Analysis. J Cardiothorac Vasc Anesth 2016; 30:1516-1522. [DOI: 10.1053/j.jvca.2016.04.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Indexed: 11/11/2022]
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Kaushal RP, Vatal A, Pathak R. Effect of etomidate and propofol induction on hemodynamic and endocrine response in patients undergoing coronary artery bypass grafting/mitral valve and aortic valve replacement surgery on cardiopulmonary bypass. Ann Card Anaesth 2016; 18:172-8. [PMID: 25849685 PMCID: PMC4881645 DOI: 10.4103/0971-9784.154470] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
INTRODUCTION The concerns for induction of anaesthesia in patients undergoing cardiac surgery include hemodynamic stability, attenuation of stress response and maintenance of balance between myocardial oxygen demand and supply. Various Intravenous anaesthetic agents like Thiopentone, Etomidate, Propofol, Midazolam, and Ketamine have been used for anesthetizing patients for cardiac surgeries. However, many authors have expressed concerns regarding induction with thiopentone, midazolam and ketamine. Hence, Propofol and Etomidate are preferred for induction in these patients. However, these two drugs have different characteristics. Etomidate is preferred for patients with poor left ventricular (LV) function as it provides stable cardiovascular profile. But there are concerns about reduction in adrenal suppression and serum cortisol levels. Propofol, on the other hand may cause a reduction in systemic vascular resistance and subsequent hypotension. Thus, this study was conducted to compare induction with these two agents in cardiac surgeries. METHODS Baseline categorical and continuous variables were compared using Fisher's exact test and student's t test respectively. Hemodynamic variables were compared using student's t test for independent samples. The primary outcome (serum cortisol and blood sugar) of the study was compared using Wilcoxon Rank Sum test. The P value less than 0.05 was considered significant. RESULTS Etomidate provides more stable hemodynamic parameters as compared to Propofol. Propofol causes vasodilation and may result in drop of systematic BP. Etomidate can therefore be safely used for induction in patients with good LV function for CABG/MVR/AVR on CPB without serious cortisol suppression lasting more than twenty-four hours.
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Affiliation(s)
- Ram Prasad Kaushal
- Department Anesthesiology, Gandhi Medical College, Bhopal, Madhya Pradesh, India
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Song JC, Lu ZJ, Jiao YF, Yang B, Gao H, Zhang J, Yu WF. Etomidate Anesthesia during ERCP Caused More Stable Haemodynamic Responses Compared with Propofol: A Randomized Clinical Trial. Int J Med Sci 2015; 12:559-65. [PMID: 26180512 PMCID: PMC4502060 DOI: 10.7150/ijms.11521] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Accepted: 05/25/2015] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Propofol may result in hypotension and respiratory depression, while etomidate is considered to be a safe induction agent for haemodynamically unstable patients because of its low risk of hypotension. We hypothesized that etomidate anesthesia during ERCP caused more stable haemodynamic responses compared with propofol. The primary endpoint was to compare the haemodynamic effects of etomidate vs. propofol in ERCP cases. The secondary endpoint was overall survival. METHODS A total of 80 patients undergoing ERCP were randomly assigned to an etomidate or propofol group. Patients in the etomidate group received etomidate induction and maintenance during ERCP, and patients in the propofol group received propofol induction and maintenance. Cardiovascular parameters and procedure-related time were measured and recorded during ERCP. RESULTS The average percent change to baseline in MBP was -8.4±7.8 and -14.4±9.4 with P = 0.002, and in HR was 1.8±16.6 and 2.4±16.3 with P = 0.874 in the etomidate group and the propofol group, respectively. MBP values in the etomidate group decreased significantly less than those in the propofol group (P<0.05). The ERCP duration and recovery time in both groups was similar. There was no significant difference in the survival rates between groups ( p = 0.942). CONCLUSIONS Etomidate anesthesia during ERCP caused more stable haemodynamic responses compared with propofol.
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Affiliation(s)
- Jin-Chao Song
- 1. Department of Anesthesiology, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, China
| | - Zhi-Jie Lu
- 1. Department of Anesthesiology, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, China
| | - Ying-Fu Jiao
- 1. Department of Anesthesiology, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, China
| | - Bin Yang
- 2. Department of Anesthesiology, Shanghai first people's hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hao Gao
- 1. Department of Anesthesiology, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, China
| | - Jinmin Zhang
- 1. Department of Anesthesiology, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, China
| | - Wei-Feng Yu
- 1. Department of Anesthesiology, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, China
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Ma YH, Li YW, Ma L, Cao CH, Liu XD. Anesthesia for stem cell transplantation in autistic children: A prospective, randomized, double-blind comparison of propofol and etomidate following sevoflurane inhalation. Exp Ther Med 2015; 9:1035-1039. [PMID: 25667673 PMCID: PMC4316962 DOI: 10.3892/etm.2015.2176] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2014] [Accepted: 12/17/2014] [Indexed: 12/21/2022] Open
Abstract
The objective of the present study was to comparatively investigate the feasibility and safety of etomidate and propofol use following sevoflurane inhalation in autistic children during the intrathecal transplantation of stem cells. The patients selected were 60 autistic children with American Society of Anesthesiologists physical status I, who were aged between two and 12 years and scheduled for stem cell transplantation. The children received an inhalation induction of 8% sevoflurane, followed by intravenous injection of etomidate (0.2 mg/kg) in group E and propofol (2 mg/kg) in group P (n=30/group). Supplemental doses of 0.1 mg/kg etomidate or 1 mg/kg propofol were used until a deep sedation was obtained. The heart rate (HR), mean arterial pressure, oxygen saturation, respiratory rate, Ramsay sedation score (RSS) and recovery time were monitored continuously. Following anesthesia, blood pressure and HR measurements were significantly decreased in group P compared with the baseline (P<0.01) and group E values at the same time-points (P<0.05). The occurrence of adverse effects, such as respiratory depression, bradycardia, hypotension and pain on injection, was significantly higher in group P than that in group E, whereas the incidence of myoclonus in group E was significantly higher than that in group P (P<0.01). No significant differences in anesthesia induction, surgery duration, recovery time, RSS and physician satisfaction were observed between the two groups. In conclusion, sevoflurane-etomidate combinations resulted in more stable hemodynamic responses and relatively fewer adverse effects compared with propofol injection following sevoflurane inhalation and may therefore be more suitable for the induction of short-term anesthesia in autistic children during stem cell transplantation.
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Affiliation(s)
- Yu-Heng Ma
- Department of Anesthesiology, Second Artillery General Hospital of PLA, Beijing 100088, P.R. China
| | - Yong-Wang Li
- Department of Anesthesiology, Second Artillery General Hospital of PLA, Beijing 100088, P.R. China
| | - Li Ma
- Department of Gynecology and Obstetrics, Second Artillery General Hospital of PLA, Beijing 100088, P.R. China
| | - Cai-Hong Cao
- Department of Anesthesiology, Second Artillery General Hospital of PLA, Beijing 100088, P.R. China
| | - Xiang-Dong Liu
- Department of Anesthesiology, Second Artillery General Hospital of PLA, Beijing 100088, P.R. China
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Jones GM, Doepker BA, Erdman MJ, Kimmons LA, Elijovich L. Predictors of severe hypotension in neurocritical care patients sedated with propofol. Neurocrit Care 2014; 20:270-6. [PMID: 24233892 DOI: 10.1007/s12028-013-9902-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
INTRODUCTION Propofol is used extensively in neurocritical care (NCC) due to its pharmacologic properties allowing for facilitation of serial neurologic examinations. Despite widespread use, few studies have identified risk factors for hypotension in these patients. We aimed to determine predictors of hypotension in NCC patients sedated with propofol. METHODS This retrospective, multicenter study evaluated 237 patients at two academic medical centers, both with dedicated NCC teams led by board-certified neurointensivists. Univariate analyses were performed to determine risk factors associated with severe hypotension during sedation with propofol. Multivariable analysis was performed to determine variables independently associated with hypotension, defined as a mean arterial pressure (MAP) less than 60 mmHg. RESULTS There was an average maximum reduction in MAP of 28.8 % after propofol initiation in the entire cohort. Severe hypotension developed in 62 (26.2 %) patients to a median nadir MAP of 56 mmHg. Those who developed severe hypotension had a longer median duration of mechanical ventilation (5.0 vs. 3.6 days; p = 0.01) and an increased in-hospital mortality (38.7 vs. 24.0 %; p = 0.03). Multivariable logistic regression analysis identified increasing number of changes to the propofol infusion rate, baseline MAP 60-70 mmHg, and need for renal replacement therapy (RRT) as factors independently associated with hypotension. CONCLUSIONS Multiple factors predicted hypotension in NCC patients receiving propofol. Clinicians should use propofol cautiously in patients with a lower baseline MAP or receiving RRT. Development of protocols related to the frequency of dose titrations is also recommended to prevent this avoidable complication.
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Affiliation(s)
- G Morgan Jones
- Critical Care Pharmacy, Methodist Healthcare, University Hospital, University of Tennessee Health Sciences Center, 1265 Union Avenue, Memphis, TN, 38104, USA,
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Lonjaret L, Lairez O, Minville V, Geeraerts T. Optimal perioperative management of arterial blood pressure. Integr Blood Press Control 2014; 7:49-59. [PMID: 25278775 PMCID: PMC4178624 DOI: 10.2147/ibpc.s45292] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Perioperative blood pressure management is a key factor of patient care for anesthetists, as perioperative hemodynamic instability is associated with cardiovascular complications. Hypertension is an independent predictive factor of cardiac adverse events in noncardiac surgery. Intraoperative hypotension is one of the most encountered factors associated with death related to anesthesia. In the preoperative setting, the majority of antihypertensive medications should be continued until surgery. Only renin-angiotensin system antagonists may be stopped. Hypertension, especially in the case of mild to moderate hypertension, is not a cause for delaying surgery. During the intraoperative period, anesthesia leads to hypotension. Hypotension episodes should be promptly treated by intravenous vasopressors, and according to their etiology. In the postoperative setting, hypertension predominates. Continuation of antihypertensive medications and postoperative care may be insufficient. In these cases, intravenous antihypertensive treatments are used to control blood pressure elevation.
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Affiliation(s)
- Laurent Lonjaret
- Department of Anesthesiology and Intensive Care, Clinique des eaux claires, Baie-Mahault, France
| | - Olivier Lairez
- Department of Cardiology, University Toulouse III - Paul Sabatier, Toulouse, France
| | - Vincent Minville
- Department of Anesthesiology and Intensive Care, University Hospital of Toulouse, University Toulouse III - Paul Sabatier, Toulouse, France
| | - Thomas Geeraerts
- Department of Anesthesiology and Intensive Care, University Hospital of Toulouse, University Toulouse III - Paul Sabatier, Toulouse, France
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ERDOES G, BASCIANI RM, EBERLE B. Etomidate--a review of robust evidence for its use in various clinical scenarios. Acta Anaesthesiol Scand 2014; 58:380-9. [PMID: 24588359 DOI: 10.1111/aas.12289] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/27/2014] [Indexed: 02/02/2023]
Abstract
Etomidate is an intravenous hypnotic with a favourable clinical profile in haemodynamic high-risk scenarios. Currently, there is an active debate about the clinical significance of the drug's side effects and its overall risk-benefit ratio. Etomidate-induced transient adrenocortical suppression is well documented and has been associated with increased mortality in sepsis. In surgical patients at risk of hypotensive complications, however, a review of current literature provides no robust evidence to contraindicate a single-bolus etomidate induction. Large randomised controlled trials as well as additional observational data are required to compare safety of etomidate and its alternatives.
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Affiliation(s)
- G. ERDOES
- Department of Anaesthesiology and PainTherapy; University Hospital Bern; Bern Switzerland
| | - R. M. BASCIANI
- Department of Anaesthesiology and PainTherapy; University Hospital Bern; Bern Switzerland
| | - B. EBERLE
- Department of Anaesthesiology and PainTherapy; University Hospital Bern; Bern Switzerland
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Jones GM, Doepker BA, Erdman MJ, Kimmons LA, Elijovich L. Predictors of severe hypotension in neurocritical care patients sedated with propofol. Neurocrit Care 2013. [PMID: 24233892 DOI: 10.1007/s12028-013-9902-6.] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/29/2022]
Abstract
INTRODUCTION Propofol is used extensively in neurocritical care (NCC) due to its pharmacologic properties allowing for facilitation of serial neurologic examinations. Despite widespread use, few studies have identified risk factors for hypotension in these patients. We aimed to determine predictors of hypotension in NCC patients sedated with propofol. METHODS This retrospective, multicenter study evaluated 237 patients at two academic medical centers, both with dedicated NCC teams led by board-certified neurointensivists. Univariate analyses were performed to determine risk factors associated with severe hypotension during sedation with propofol. Multivariable analysis was performed to determine variables independently associated with hypotension, defined as a mean arterial pressure (MAP) less than 60 mmHg. RESULTS There was an average maximum reduction in MAP of 28.8 % after propofol initiation in the entire cohort. Severe hypotension developed in 62 (26.2 %) patients to a median nadir MAP of 56 mmHg. Those who developed severe hypotension had a longer median duration of mechanical ventilation (5.0 vs. 3.6 days; p = 0.01) and an increased in-hospital mortality (38.7 vs. 24.0 %; p = 0.03). Multivariable logistic regression analysis identified increasing number of changes to the propofol infusion rate, baseline MAP 60-70 mmHg, and need for renal replacement therapy (RRT) as factors independently associated with hypotension. CONCLUSIONS Multiple factors predicted hypotension in NCC patients receiving propofol. Clinicians should use propofol cautiously in patients with a lower baseline MAP or receiving RRT. Development of protocols related to the frequency of dose titrations is also recommended to prevent this avoidable complication.
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Affiliation(s)
- G Morgan Jones
- Critical Care Pharmacy, Methodist Healthcare, University Hospital, University of Tennessee Health Sciences Center, 1265 Union Avenue, Memphis, TN, 38104, USA,
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Sharma R, Mehta Y, Sapra H. Severe aortic stenosis and subarachnoid hemorrhage: Anesthetic management of lethal combination. J Anaesthesiol Clin Pharmacol 2013; 29:255-7. [PMID: 23878455 PMCID: PMC3713681 DOI: 10.4103/0970-9185.111662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Despite advances in various modalities of management, subarachnoid hemorrhage (SAH) continues to be associated with high mortality, which is further increased by associated comorbidities. Aortic stenosis (AS) is one such disease which can further complicate the course of SAH. We recently managed a known patient of severe AS, who presented with aneurysmal SAH. Patient was planned for eurovascular intervention. With proper assessment and planning, patient was managed with favorable outcome despite the restrictions faced in the neurovascular intervention laboratory.
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Affiliation(s)
- Rakesh Sharma
- Department of Anaesthesia and Critical Care, Medanta-The Medicity, Gurgaon, Haryana, India
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Budde AO, Mets B. Pro: Etomidate Is the Ideal Induction Agent for a Cardiac Anesthetic. J Cardiothorac Vasc Anesth 2013; 27:180-3. [DOI: 10.1053/j.jvca.2012.08.024] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2012] [Indexed: 11/11/2022]
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Möller Petrun A, Kamenik M. Bispectral index-guided induction of general anaesthesia in patients undergoing major abdominal surgery using propofol or etomidate: a double-blind, randomized, clinical trial. Br J Anaesth 2012; 110:388-96. [PMID: 23166149 DOI: 10.1093/bja/aes416] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND In a double-blind, randomized trial, we compared the haemodynamic effects of a bispectral index (BIS)-guided etomidate and propofol infusion for anaesthesia induction in patients undergoing major abdominal surgery. METHODS Forty-six patients were randomly assigned to two groups based on the induction of anaesthesia, performed with a BIS value of 60 titrated infusion of etomidate (E group) or propofol (P group). Mean arterial pressure (MAP), cardiac index (CI), heart rate, and systemic vascular resistance index (SVRI) measurements were taken 1 min before induction and recorded at 1-min intervals for 20 min. P<0.05 was considered statistically significant. RESULTS Before intubation, no significant differences between the two groups regarding the haemodynamics were noticed. At intubation and up to 7 min after intubation MAP (P=0.019) was significantly higher in the E group. CI was significantly higher in the E group with respect to the P group 2, 6, and 7 min after intubation. Twenty-three patients developed complications. The incidence of hypotension was higher in the P group than that in the E group (8 vs 3; P=0.08), and the incidence of hypertension was significantly higher in the E group than that in the P group (10 vs 2; P=0.007). CONCLUSIONS Our study showed that the use of propofol resulted in less hypertension and tachycardia at and after intubation than etomidate. But even with the reduced doses given with the BIS-guided protocol, it often caused significant hypotension.
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Affiliation(s)
- A Möller Petrun
- Department of Anaesthesiology, Intensive Care and Pain Management University Medical Centre Maribor, Ljubljanska ulica 5, SI-2000 Maribor, Slovenia
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Feussner M, Mukherjee C, Garbade J, Ender J. Anaesthesia for patients undergoing ventricular assist-device implantation. Best Pract Res Clin Anaesthesiol 2012; 26:167-77. [DOI: 10.1016/j.bpa.2012.06.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Revised: 06/04/2012] [Accepted: 06/04/2012] [Indexed: 01/03/2023]
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Freysz M, Orliaguet G. [Sedation and analgesia in emergency structure. Which are the properties and the disadvantages of the products used?]. ANNALES FRANCAISES D'ANESTHESIE ET DE REANIMATION 2012; 31:283-294. [PMID: 22436603 DOI: 10.1016/j.annfar.2012.01.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Affiliation(s)
- M Freysz
- Departement de medecine d'urgence, universite de Bourgogne, CHU de Dijon, BP 77908, 21079 Dijon cedex, France.
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Swerdlow BN. What is the best anesthetic for ICD implants? Heart Rhythm 2011; 9:349-50. [PMID: 22080110 DOI: 10.1016/j.hrthm.2011.11.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2011] [Indexed: 10/15/2022]
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The Effect of a Bolus Dose of Etomidate on Cortisol Levels, Mortality, and Health Services Utilization: A Systematic Review. Ann Emerg Med 2010; 56:105-13.e5. [DOI: 10.1016/j.annemergmed.2010.01.030] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2009] [Revised: 01/21/2010] [Accepted: 01/29/2010] [Indexed: 11/23/2022]
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Lee JH, Lee JH, Chin YJ, Lee SI, Chung CJ, Lee SC, Choi SR. The effect of fentanyl pretreatment on myoclonus during induction of anesthesia with etomidate in elderly patients. Korean J Anesthesiol 2008. [DOI: 10.4097/kjae.2008.55.2.150] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- Ji Hyeon Lee
- Department of Anesthesiology and Pain Medicine, College of Medicine, Dong-A University, Busan, Korea
| | - Jong Hwan Lee
- Department of Anesthesiology and Pain Medicine, College of Medicine, Dong-A University, Busan, Korea
| | - Young Jhoon Chin
- Department of Anesthesiology and Pain Medicine, College of Medicine, Dong-A University, Busan, Korea
| | - Soo Il Lee
- Department of Anesthesiology and Pain Medicine, College of Medicine, Dong-A University, Busan, Korea
| | - Chan Jong Chung
- Department of Anesthesiology and Pain Medicine, College of Medicine, Dong-A University, Busan, Korea
| | - Seung Cheol Lee
- Department of Anesthesiology and Pain Medicine, College of Medicine, Dong-A University, Busan, Korea
| | - So Ron Choi
- Department of Anesthesiology and Pain Medicine, College of Medicine, Dong-A University, Busan, Korea
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Current World Literature. Curr Opin Anaesthesiol 2007; 20:388-94. [PMID: 17620851 DOI: 10.1097/aco.0b013e3282c3a878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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