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Ratajczak N, Munoz-Acuna R, Redaelli S, Suleiman A, Seibold EL, von Wedel D, Shay D, Ashrafian S, Chen G, Sundar E, Ahrens E, Wachtendorf LJ, Schaefer MS. Increased Postoperative Opioid Consumption in the Presence of Coadministration of 5-Hydroxytryptamine Type 3 Antagonists with Acetaminophen: A Hospital Registry Study. Anesthesiology 2024; 141:326-337. [PMID: 38700445 DOI: 10.1097/aln.0000000000005033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2024]
Abstract
BACKGROUND Acetaminophen and 5-hydroxytryptamine type 3 (5-HT3) receptor antagonists are administered as standard prophylaxes for postoperative pain, nausea, and vomiting. Preclinical studies, however, suggest that 5-HT3 antagonists may compromise acetaminophen's analgesic effect. This hospital registry study investigates whether 5-HT3 antagonists mitigate the analgesic effect of prophylactic acetaminophen in a perioperative setting. METHODS This study included 55,016 adult patients undergoing general anesthesia for ambulatory procedures at a tertiary healthcare center in Massachusetts from 2015 to 2022. Using binary exposure variables and a comprehensive selection of preplanned patient- and procedure-related covariates for confounder control, the authors investigated whether intraoperative 5-HT3 antagonists affected the association between pre- or intraoperative acetaminophen and postoperative opioid consumption, gauged by opioid dose in milligram oral morphine equivalents (OME) administered in the postanesthesia care unit. A multivariable, zero-inflated negative binomial regression model was applied. RESULTS A total of 3,166 patients (5.8%) received only acetaminophen, 15,438 (28.1%) only 5-HT3 antagonists, 31,850 (57.9%) both drugs, and 4,562 (8.3%) neither drug. The median postanesthesia care unit opioid dose was 7.5 mg OME (interquartile range, 7.5 to 14.3 mg OME) among 16,640 of 55,016 (30.2%) patients who received opioids, and the mean opioid dose was 3.2 mg OME across all patients (maximum cumulative dose, 20.4 mg OME). Acetaminophen administration was associated with a -5.5% (95% CI, -9.6 to -1.4%; P = 0.009; adjusted absolute difference, -0.19 mg OME; 95% CI, -0.33 to -0.05; P = 0.009) reduction in opioid consumption among patients who did not receive a 5-HT3 antagonist, while there was no effect in patients who received a 5-HT3 antagonist (adjusted absolute difference, 0.00 mg OME; 95% CI, -0.06 to 0.05; P = 0.93; P for interaction = 0.013). CONCLUSIONS A dose-dependent association of pre- or intraoperative acetaminophen with decreased postoperative opioid consumption was not observed when 5-HT3 antagonists were coadministered, suggesting that physicians might consider reserving 5-HT3 antagonists as rescue medication for postoperative nausea or vomiting when acetaminophen is administered for pain prophylaxis. EDITOR’S PERSPECTIVE
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Affiliation(s)
- Nikolai Ratajczak
- Department of Anesthesia, Critical Care and Pain Medicine, and Center for Anesthesia Research Excellence, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
| | - Ricardo Munoz-Acuna
- Department of Anesthesia, Critical Care and Pain Medicine, and Center for Anesthesia Research Excellence, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
| | - Simone Redaelli
- Department of Anesthesia, Critical Care and Pain Medicine, and Center for Anesthesia Research Excellence, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts; School of Medicine and Surgery, University of Milano-Bicocca, Milan, Italy
| | - Aiman Suleiman
- Department of Anesthesia, Critical Care and Pain Medicine, and Center for Anesthesia Research Excellence, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts; Department of Anesthesia and Intensive Care, Faculty of Medicine, University of Jordan, Amman, Jordan
| | - Eva-Lotte Seibold
- Department of Anesthesia, Critical Care and Pain Medicine, and Center for Anesthesia Research Excellence, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
| | - Dario von Wedel
- Department of Anesthesia, Critical Care and Pain Medicine, and Center for Anesthesia Research Excellence, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
| | - Denys Shay
- Department of Anesthesia, Critical Care and Pain Medicine, and Center for Anesthesia Research Excellence, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts; Department of Epidemiology, Harvard T. H. Chan School of Public Health, Boston, Massachusetts
| | - Sarah Ashrafian
- Department of Anesthesia, Critical Care and Pain Medicine, and Center for Anesthesia Research Excellence, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts; Department of Epidemiology, Harvard T. H. Chan School of Public Health, Boston, Massachusetts
| | - Guanqing Chen
- Department of Anesthesia, Critical Care and Pain Medicine, and Center for Anesthesia Research Excellence, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts; Department of Epidemiology, Harvard T. H. Chan School of Public Health, Boston, Massachusetts
| | - Eswar Sundar
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
| | - Elena Ahrens
- Department of Anesthesia, Critical Care and Pain Medicine, and Center for Anesthesia Research Excellence, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
| | - Luca J Wachtendorf
- Department of Anesthesia, Critical Care and Pain Medicine, and Center for Anesthesia Research Excellence, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
| | - Maximilian S Schaefer
- Department of Anesthesia, Critical Care and Pain Medicine, and Center for Anesthesia Research Excellence, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts; Department of Anesthesiology, Duesseldorf University Hospital, Duesseldorf, Germany
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Nijs K, Hertogen P‘, Buelens S, Coppens M, Teunkens A, Jalil H, Van de Velde M, Al Tmimi L, Stessel B. Axillary Brachial Plexus Block Compared with Other Regional Anesthesia Techniques in Distal Upper Limb Surgery: A Systematic Review and Meta-Analysis. J Clin Med 2024; 13:3185. [PMID: 38892896 PMCID: PMC11173314 DOI: 10.3390/jcm13113185] [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: 04/24/2024] [Revised: 05/21/2024] [Accepted: 05/24/2024] [Indexed: 06/21/2024] Open
Abstract
Background: Several regional anesthesia (RA) techniques have been described for distal upper limb surgery. However, the best approach in terms of RA block success rate and safety is not well recognized. Objective: To assess and compare the surgical anesthesia and efficacy of axillary brachial plexus block with other RA techniques for hand and wrist surgery. The attainment of adequate surgical anesthesia 30 min after block placement was considered a primary outcome measure. Additionally, successful block outcomes were required without the use of supplemental local anesthetic injection, systemic opioid analgesia, or the need to convert to general anesthesia. Methods: We performed a systematic search in the following databases: MEDLINE, EMBASE, Cochrane Database of Systematic Reviews, and CENTRAL. RCTs comparing axillary blocks with other brachial plexus block techniques, distal peripheral forearm nerve block, intravenous RA, and the wide-awake local anesthesia no tourniquet (WALANT) technique were included. Results: In total, 3070 records were reviewed, of which 28 met the inclusion criteria. The meta-analysis of adequate surgical anesthesia showed no significant difference between ultrasound-guided axillary block and supraclavicular block (RR: 0.94 [0.89, 1.00]; p = 0.06; I2 = 60.00%), but a statistically significant difference between ultrasound-guided axillary block and infraclavicular block (RR: 0.92 [0.88, 0.97]; p < 0.01; I2 = 53.00%). Ultrasound-guided infraclavicular blocks were performed faster than ultrasound-guided axillary blocks (SMD: 0.74 [0.30, 1.17]; p < 0.001; I2 = 85.00%). No differences in performance time between ultrasound-guided axillary and supraclavicular blocks were demonstrated. Additionally, adequate surgical anesthesia onset time was not significantly different between ultrasound-guided block approaches: ultrasound-guided axillary blocks versus ultrasound-guided supraclavicular blocks (SMD: 0.52 [-0.14, 1.17]; p = 0.12; I2 = 86.00%); ultrasound-guided axillary blocks versus ultrasound-guided infraclavicular blocks (SMD: 0.21 [-0.49, 0.91]; p = 0.55; I2 = 92.00%). Conclusions: The RA choice should be individualized depending on the patient, procedure, and operator-specific parameters. Compared to ultrasound-guided supraclavicular and infraclavicular block, ultrasound-guided axillary block may be preferred for patients with significant concerns of block-related side effects/complications. High heterogeneity between studies shows the need for more robust RCTs.
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Affiliation(s)
- Kristof Nijs
- Department of Anesthesiology and Pain Medicine, Jessa Hospital, 3500 Hasselt, Belgium
- Faculty of Medicine and Life Sciences, University of Hasselt, 3590 Diepenbeek, Belgium
- Department of Cardiovascular Sciences, University of Leuven, 3000 Leuven, Belgium
| | - Pieter ‘s Hertogen
- Department of Anesthesiology and Pain Medicine, Jessa Hospital, 3500 Hasselt, Belgium
- Department of Cardiovascular Sciences, University of Leuven, 3000 Leuven, Belgium
- Department of Anesthesiology and Pain Medicine, University Hospitals Leuven, 3000 Leuven, Belgium
| | - Simon Buelens
- Department of Anesthesiology and Pain Medicine, Jessa Hospital, 3500 Hasselt, Belgium
- Department of Cardiovascular Sciences, University of Leuven, 3000 Leuven, Belgium
- Department of Anesthesiology and Pain Medicine, University Hospitals Leuven, 3000 Leuven, Belgium
| | - Marc Coppens
- Department of Anesthesiology and Perioperative Medicine, University Hospital Ghent, 9000 Ghent, Belgium
- Department of Basic and Applied Medical Sciences, University Ghent, 9000 Ghent, Belgium
| | - An Teunkens
- Department of Cardiovascular Sciences, University of Leuven, 3000 Leuven, Belgium
- Department of Anesthesiology and Pain Medicine, University Hospitals Leuven, 3000 Leuven, Belgium
| | - Hassanin Jalil
- Department of Anesthesiology and Pain Medicine, Jessa Hospital, 3500 Hasselt, Belgium
| | - Marc Van de Velde
- Department of Cardiovascular Sciences, University of Leuven, 3000 Leuven, Belgium
- Department of Anesthesiology and Pain Medicine, University Hospitals Leuven, 3000 Leuven, Belgium
| | - Layth Al Tmimi
- Department of Cardiovascular Sciences, University of Leuven, 3000 Leuven, Belgium
- Department of Anesthesiology and Pain Medicine, University Hospitals Leuven, 3000 Leuven, Belgium
| | - Björn Stessel
- Department of Anesthesiology and Pain Medicine, Jessa Hospital, 3500 Hasselt, Belgium
- Faculty of Medicine and Life Sciences, University of Hasselt, 3590 Diepenbeek, Belgium
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Munoz-Acuna R, Tartler TM, Azizi BA, Suleiman A, Ahrens E, Wachtendorf LJ, Linhardt FC, Chen G, Tung P, Waks JW, Schaefer MS, Sehgal S. Recovery and safety with prolonged high-frequency jet ventilation for catheter ablation of atrial fibrillation: A hospital registry study from a New England healthcare network. J Clin Anesth 2024; 93:111324. [PMID: 38000222 DOI: 10.1016/j.jclinane.2023.111324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 10/24/2023] [Accepted: 11/12/2023] [Indexed: 11/26/2023]
Abstract
STUDY OBJECTIVE To investigate post-procedural recovery as well as peri-procedural respiratory and hemodynamic safety parameters with prolonged use of high-frequency jet ventilation (HFJV) versus conventional ventilation in patients undergoing catheter ablation for atrial fibrillation. DESIGN Hospital registry study. SETTING Tertiary academic teaching hospital in New England. PATIENTS 1822 patients aged 18 years and older undergoing catheter ablation between January 2013 and June 2020. INTERVENTIONS HFJV versus conventional mechanical ventilation. MEASUREMENTS The primary outcome was post-anesthesia care unit (PACU) length of stay. In secondary analyses we assessed the effect of HFJV on intra-procedural hypoxemia, defined as the occurrence of peripheral hemoglobin oxygen saturation (SpO2) <90%, post-procedural respiratory complications (PRC) as well as intra-procedural hypocarbia and hypotension. Multivariable negative binomial and logistic regression analyses, adjusted for patient and procedural characteristics, were applied. MAIN RESULTS 1157 patients (63%) received HFJV for a median (interquartile range [IQR]) duration of 307 (253-360) minutes. The median (IQR) length of stay in the PACU was 244 (172-370) minutes in patients who underwent ablation with conventional mechanical ventilation and 226 (163-361) minutes in patients receiving HFJV. In adjusted analyses, patients undergoing HFJV had a longer PACU length of stay (adjusted absolute difference: 37.7 min; 95% confidence interval [CI] 9.7-65.8; p = 0.008). There was a higher risk of intra-procedural hypocarbia (adjusted odds ratio [ORadj] 5.90; 95%CI 2.63-13.23; p < 0.001) and hypotension (ORadj 1.88; 95%CI 1.31-2.72; p = 0.001) in patients undergoing HFJV. No association was found between the use of HFJV and intra-procedural hypoxemia or PRC (p = 0.51, and p = 0.97, respectively). CONCLUSION After confounder adjustment, HFJV for catheter ablation procedures for treatment of atrial fibrillation was associated with a longer length of stay in the PACU. It was further associated with an increased risk of intra-procedural abnormalities including abnormal carbon dioxide homeostasis, as well as intra-procedural arterial hypotension.
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Affiliation(s)
- Ricardo Munoz-Acuna
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, Boston, MA 02215, United States of America; Center for Anesthesia Research Excellence (CARE), Beth Israel Deaconess Medical Center, Harvard Medical School, 375 Longwood Avenue, Boston, MA 02215, United States of America.
| | - Tim M Tartler
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, Boston, MA 02215, United States of America; Center for Anesthesia Research Excellence (CARE), Beth Israel Deaconess Medical Center, Harvard Medical School, 375 Longwood Avenue, Boston, MA 02215, United States of America.
| | - Basit A Azizi
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, Boston, MA 02215, United States of America; Center for Anesthesia Research Excellence (CARE), Beth Israel Deaconess Medical Center, Harvard Medical School, 375 Longwood Avenue, Boston, MA 02215, United States of America.
| | - Aiman Suleiman
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, Boston, MA 02215, United States of America; Center for Anesthesia Research Excellence (CARE), Beth Israel Deaconess Medical Center, Harvard Medical School, 375 Longwood Avenue, Boston, MA 02215, United States of America; Department of Anesthesia and Intensive Care, Faculty of Medicine, The University of Jordan, Queen Rania St, Amman, Jordan, 11942, Jordan.
| | - Elena Ahrens
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, Boston, MA 02215, United States of America; Center for Anesthesia Research Excellence (CARE), Beth Israel Deaconess Medical Center, Harvard Medical School, 375 Longwood Avenue, Boston, MA 02215, United States of America.
| | - Luca J Wachtendorf
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, Boston, MA 02215, United States of America; Center for Anesthesia Research Excellence (CARE), Beth Israel Deaconess Medical Center, Harvard Medical School, 375 Longwood Avenue, Boston, MA 02215, United States of America.
| | - Felix C Linhardt
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, Boston, MA 02215, United States of America; Center for Anesthesia Research Excellence (CARE), Beth Israel Deaconess Medical Center, Harvard Medical School, 375 Longwood Avenue, Boston, MA 02215, United States of America.
| | - Guanqing Chen
- Center for Anesthesia Research Excellence (CARE), Beth Israel Deaconess Medical Center, Harvard Medical School, 375 Longwood Avenue, Boston, MA 02215, United States of America.
| | - Patricia Tung
- Harvard-Thorndike Electrophysiology Institute, Division of Cardiovascular Medicine, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, Boston, MA 02215, United States of America.
| | - Jonathan W Waks
- Harvard-Thorndike Electrophysiology Institute, Division of Cardiovascular Medicine, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, Boston, MA 02215, United States of America.
| | - Maximilian S Schaefer
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, Boston, MA 02215, United States of America; Center for Anesthesia Research Excellence (CARE), Beth Israel Deaconess Medical Center, Harvard Medical School, 375 Longwood Avenue, Boston, MA 02215, United States of America; Klinik für Anästhesiologie, Universitätsklinikum Düsseldorf, Moorenstraße 5, Düsseldorf 40225, Germany.
| | - Sankalp Sehgal
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, Boston, MA 02215, United States of America.
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Hammer M, Heggemann Y, Auffarth GU. Dynamic Stimulation Aberrometry: Objectively Measured Accommodation and Pupil Dynamics after Phakic Iris-Fixated Intraocular Lens Implantation. OPHTHALMOLOGY SCIENCE 2024; 4:100374. [PMID: 37868795 PMCID: PMC10587632 DOI: 10.1016/j.xops.2023.100374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 07/14/2023] [Accepted: 07/18/2023] [Indexed: 10/24/2023]
Abstract
Purpose Anterior iris-claw phakic intraocular lens (pIOL) implantation is a treatment option for refractive, ametropic patients. However, the postoperative accommodative ability has not been systematically researched. Dynamic stimulation aberrometry allows the objective and dynamical measurement of accommodation by observing ocular aberrations during the accommodation process. We investigated the dynamic accommodative ability after pIOL implantation compared with a healthy age- and gender-matched control group. Design Clinical, comparative case-control study. Subjects We included patients aged 18-50 years that either underwent pIOL implantation > 1 month ago or served as a healthy, phakic control group. Methods The accommodative ability and pupil dynamics of both groups were investigated using dynamic stimulation aberrometry. The method allows the analysis of dynamic parameters during accommodation, such as the accommodation speed. A 1:1 propensity score matching was conducted based on the patients' age and gender. Main Outcome Measures Parameters of objective accommodation, such as accommodative amplitude and pupil dynamic during accommodation. Results Fifty-eight healthy, phakic eyes < 50 years of age and 21 eyes after pIOL implantation to correct myopia (pIOL, Verisyse, AMO, Inc) were enrolled. Patients that underwent anterior pIOL implantation were examined on average 24 ± 18 months after surgery. After matching, the mean age of both groups was not significantly different (35 ± 8 vs. 34 ± 8 years). No significant difference in dynamic parameters of accommodation or the accommodative amplitude (2.8 ± 1.4 and 2.9 ± 1.4 diopters [D] for pIOL and control group, P = 0.82) were seen. Maximum and minimum pupil sizes were not significantly different. The change in pupil size during deaccommodation was significantly faster in patients after pIOL implantation (P < 0.001). Conclusions Dynamic stimulation aberrometry allowed the objective, dynamic, measurement of wavefronts in subjects with accommodative amplitudes up to 7 D. Phakic intraocular lens implantation does not impair the accommodative ability. It alters pupil dynamics during deaccommodation. Financial Disclosures Proprietary or commercial disclosure may be found after the references.
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Affiliation(s)
- Maximilian Hammer
- David J. Apple Laboratory for Vision Research, Heidelberg, Germany
- Department of Ophthalmology, University of Heidelberg, International Vision Correction Research Centre, Heidelberg, Germany
| | - Yvonne Heggemann
- David J. Apple Laboratory for Vision Research, Heidelberg, Germany
- Department of Ophthalmology, University of Heidelberg, International Vision Correction Research Centre, Heidelberg, Germany
| | - Gerd U. Auffarth
- David J. Apple Laboratory for Vision Research, Heidelberg, Germany
- Department of Ophthalmology, University of Heidelberg, International Vision Correction Research Centre, Heidelberg, Germany
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Nijs K, Ruette J, Van de Velde M, Stessel B. Regional anaesthesia for ambulatory surgery. Best Pract Res Clin Anaesthesiol 2023; 37:397-408. [PMID: 37938085 DOI: 10.1016/j.bpa.2022.12.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 12/05/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022]
Abstract
Regional anaesthesia (RA) has an important and ever-expanding role in ambulatory surgery. Specific practices vary depending on the preferences and resources of the anaesthesia team and hospital setting. It is used for various purposes, including as primary anaesthetic technique for surgery but also as postoperative analgesic modality. The limited duration of action of currently available local anaesthetics limits their application in postoperative pain control and enhanced recovery. The search for the holy grail of regional anaesthetics continues. Current evidence suggests that a peripheral nerve block performed with long-acting local anaesthetics in combination with intravenous or perineural dexamethasone gives the longest and most optimal sensory block. In this review, we outline some possible blocks for ambulatory surgery and additives to perform RA. Moreover, we give an update on local anaesthesia drugs and adjuvants, paediatric RA in ambulatory care and discuss the impact of RA by COVID-19.
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Affiliation(s)
- Kristof Nijs
- Department of Anaesthesiology and Pain Medicine, Jessa Hospital, Hasselt, Belgium; UHasselt, Faculty of Medicine and Life Sciences, Diepenbeek, Belgium; KULeuven, Department of Cardiovascular Sciences, Leuven, Belgium; Department of Anaesthesiology and Pain Medicine, University Hospitals Leuven, Leuven, Belgium.
| | - Joke Ruette
- Department of Anaesthesiology and Pain Medicine, Jessa Hospital, Hasselt, Belgium; Department of Anaesthesiology and Pain Medicine, University Hospitals Leuven, Leuven, Belgium
| | - Marc Van de Velde
- KULeuven, Department of Cardiovascular Sciences, Leuven, Belgium; Department of Anaesthesiology and Pain Medicine, University Hospitals Leuven, Leuven, Belgium
| | - Björn Stessel
- Department of Anaesthesiology and Pain Medicine, Jessa Hospital, Hasselt, Belgium; UHasselt, Faculty of Medicine and Life Sciences, Diepenbeek, Belgium
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Suleiman A, Munoz-Acuna R, Azimaraghi O, Houle TT, Chen G, Rupp S, Witt AS, Azizi BA, Ahrens E, Shay D, Wongtangman K, Wachtendorf LJ, Tartler TM, Eikermann M, Schaefer MS. The effects of sugammadex vs. neostigmine on postoperative respiratory complications and advanced healthcare utilisation: a multicentre retrospective cohort study. Anaesthesia 2023; 78:294-302. [PMID: 36562202 DOI: 10.1111/anae.15940] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/28/2022] [Indexed: 12/24/2022]
Abstract
Reversing neuromuscular blockade with sugammadex can eliminate residual paralysis, which has been associated with postoperative respiratory complications. There are equivocal data on whether sugammadex reduces these when compared with neostigmine. We investigated the association of the choice of reversal drug with postoperative respiratory complications and advanced healthcare utilisation. We included adult patients who underwent surgery and received general anaesthesia with sugammadex or neostigmine reversal at two academic healthcare networks between January 2016 and June 2021. The primary outcome was postoperative respiratory complications, defined as post-extubation oxygen saturation < 90%, respiratory failure requiring non-invasive ventilation, or tracheal re-intubation within 7 days. Our main secondary outcome was advanced healthcare utilisation, a composite outcome including: 7-day unplanned intensive care unit admission; 30-day hospital readmission; or non-home discharge. In total, 5746 (6.9%) of 83,250 included patients experienced postoperative respiratory complications. This was not associated with the reversal drug (adjusted OR (95%CI) 1.01 (0.94-1.08); p = 0.76). After excluding patients admitted from skilled nursing facilities, 8372 (10.5%) patients required advanced healthcare utilisation, which was not associated with the choice of reversal (adjusted OR (95%CI) 0.95 (0.89-1.01); p = 0.11). Equivalence testing supported an equivalent effect size of sugammadex and neostigmine on both outcomes, and neostigmine was non-inferior to sugammadex with regard to postoperative respiratory complications or advanced healthcare utilisation. Finally, there was no association between the reversal drug and major adverse cardiovascular events (adjusted OR 1.07 (0.94-1.21); p = 0.32). Compared with neostigmine, reversal of neuromuscular blockade with sugammadex was not associated with a reduction in postoperative respiratory complications or post-procedural advanced healthcare utilisation.
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Affiliation(s)
- A Suleiman
- Department of Anesthesia, Critical Care and Pain Medicine, Center for Anesthesia Research Excellence (CARE), Beth Israel Deaconess Medical Center, Harvard Medical School, MA, Boston, USA
| | - R Munoz-Acuna
- Department of Anesthesia, Critical Care and Pain Medicine, Center for Anesthesia Research Excellence (CARE), Beth Israel Deaconess Medical Center, Harvard Medical School, MA, Boston, USA
| | - O Azimaraghi
- Department of Anesthesiology, Montefiore Medical Center and Albert Einstein College of Medicine, NY, Bronx, USA
| | - T T Houle
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, MA, Boston, USA
| | - G Chen
- Department of Anesthesia, Critical Care and Pain Medicine, Center for Anesthesia Research Excellence (CARE), Beth Israel Deaconess Medical Center, Harvard Medical School, MA, Boston, USA
| | - S Rupp
- Department of Anesthesiology, Montefiore Medical Center and Albert Einstein College of Medicine, NY, Bronx, USA
| | - A S Witt
- Department of Anesthesiology, Montefiore Medical Center and Albert Einstein College of Medicine, NY, Bronx, USA
| | - B A Azizi
- Department of Anesthesia, Critical Care and Pain Medicine, Center for Anesthesia Research Excellence (CARE), Beth Israel Deaconess Medical Center, Harvard Medical School, MA, Boston, USA
| | - E Ahrens
- Department of Anesthesia, Critical Care and Pain Medicine, Center for Anesthesia Research Excellence (CARE), Beth Israel Deaconess Medical Center, Harvard Medical School, MA, Boston, USA
| | - D Shay
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, MA, Boston, USA
| | - K Wongtangman
- Department of Anesthesiology, Montefiore Medical Center and Albert Einstein College of Medicine, NY, Bronx, USA
| | - L J Wachtendorf
- Department of Anesthesia, Critical Care and Pain Medicine, Center for Anesthesia Research Excellence (CARE), Beth Israel Deaconess Medical Center, Harvard Medical School, MA, Boston, USA
| | - T M Tartler
- Department of Anesthesia, Critical Care and Pain Medicine, Center for Anesthesia Research Excellence (CARE), Beth Israel Deaconess Medical Center, Harvard Medical School, MA, Boston, USA
| | - M Eikermann
- Department of Anesthesiology, Montefiore Medical Center and Albert Einstein College of Medicine, NY, Bronx, USA
| | - M S Schaefer
- Department of Anesthesia, Critical Care and Pain Medicine, Center for Anesthesia Research Excellence (CARE), Beth Israel Deaconess Medical Center, Harvard Medical School, MA, Boston, USA
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7
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Li M, Zhang K, Li T, Chen Y, Zang H, Hu Y, Yao W. Sciatic Nerve Block Combined with Flurbiprofen Inhibits Spinal Cord Inflammation and Improves Postoperative Pain in Rats with Plantar Incision. J Pain Res 2023; 16:1533-1546. [PMID: 37193359 PMCID: PMC10182802 DOI: 10.2147/jpr.s404226] [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] [Received: 01/31/2023] [Accepted: 04/28/2023] [Indexed: 05/18/2023] Open
Abstract
Background and Purpose Peripheral nerve block is often used to relieve postoperative pain. But the effect of nerve block on inflammatory response is not fully understood. Spinal cord is the primary center of pain processing. This study is to investigate the effect of single sciatic nerve block on the inflammatory response of the spinal cord in rats with plantar incision and the combined effect with flurbiprofen. Methods The plantar incision was used to establish a postoperative pain model. Single sciatic nerve block, intravenous flurbiprofen or the combination of both were used for intervention. The sensory and motor functions after nerve block and incision were evaluated. The changes of IL-1β, IL-6, TNF-α, microglia and astrocytes in the spinal cord were examined by qPCR and immunofluorescence respectively. Results Sciatic nerve block with 0.5% ropivacaine in rats induced sensory block for 2h and motor block for 1.5h. In the rats with plantar incision, the single sciatic nerve block did not alleviate postoperative pain or inhibit the activation of spinal microglia and astrocytes, but the levels of IL-1β and IL-6 in spinal cord were decreased when the nerve block wore off. The combined effect of a single sciatic nerve block and intravenous flurbiprofen not only decreased the levels of IL-1β, IL-6, and TNF-α, but also relieved the pain and alleviated the activation of microglia and astrocytes. Conclusion The single sciatic nerve block cannot improve postoperative pain or inhibit the activation of spinal cord glial cells, but can reduce the expression of spinal inflammatory factors. Nerve block combined with flurbiprofen can inhibit spinal cord inflammation and improve postoperative pain. This study provides a reference for rational clinical application of nerve block.
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Affiliation(s)
- Meihong Li
- Hubei Key Laboratory of Geriatric Anesthesia and Perioperative Brain Health, and Wuhan Clinical Research Center for Geriatric Anesthesia, Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, People’s Republic of China
| | - Kaiwen Zhang
- Hubei Key Laboratory of Geriatric Anesthesia and Perioperative Brain Health, and Wuhan Clinical Research Center for Geriatric Anesthesia, Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, People’s Republic of China
| | - Ting Li
- Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai, 200032, People’s Republic of China
| | - Yuye Chen
- Hubei Key Laboratory of Geriatric Anesthesia and Perioperative Brain Health, and Wuhan Clinical Research Center for Geriatric Anesthesia, Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, People’s Republic of China
| | - Hu Zang
- Hubei Key Laboratory of Geriatric Anesthesia and Perioperative Brain Health, and Wuhan Clinical Research Center for Geriatric Anesthesia, Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, People’s Republic of China
| | - Yingjie Hu
- Hubei Key Laboratory of Geriatric Anesthesia and Perioperative Brain Health, and Wuhan Clinical Research Center for Geriatric Anesthesia, Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, People’s Republic of China
| | - Wenlong Yao
- Hubei Key Laboratory of Geriatric Anesthesia and Perioperative Brain Health, and Wuhan Clinical Research Center for Geriatric Anesthesia, Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, People’s Republic of China
- Correspondence: Wenlong Yao, Hubei Key Laboratory of Geriatric Anesthesia and Perioperative Brain Health, and Wuhan Clinical Research Center for Geriatric Anesthesia, Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, People’s Republic of China, Tel +86 13720271159, Email
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Alonso S, Du AL, Waterman RS, Gabriel RA. Body Mass Index Is Not an Independent Factor Associated With Recovery Room Length of Stay for Patients Undergoing Outpatient Surgery. J Patient Saf 2022; 18:742-746. [PMID: 35588070 DOI: 10.1097/pts.0000000000001036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
OBJECTIVES Prolonged recovery time in the postanesthesia care unit (PACU) increases cost and administrative burden of outpatient surgical staff. The primary aim of this study was to determine whether body mass index (BMI) is associated with prolonged recovery in the PACU after outpatient surgery in a freestanding ambulatory surgery center. METHODS We retrospectively studied 3 years of surgeries performed at a freestanding ambulatory surgery center. Mixed-effects logistic (for binary outcomes) and linear (for continuous outcomes) regressions were performed, in which the random effect was the surgical procedure. Prolonged PACU length of stay was modeled as a binary variable, that is, stay greater than the third quartile, and as a continuous variable, that is, actual duration of stay in minutes. We reported odds ratio and 95% confidence interval from the logistic regression and estimates with standard errors from the linear regression. RESULTS Patients with obesity (BMI ≥ 30 kg/m 2 ) did not demonstrate increased odds for prolonged PACU length of stay (all P > 0.05). Furthermore, BMI-represented as a continuous variable-was not associated with actual PACU length of stay (estimate = 0.05, standard error = 0.06, P = 0.41). No association was found between obesity and PACU length of stay on a subgroup analysis where only patients with obstructive sleep apnea were analyzed. CONCLUSIONS There was no association between BMI and PACU length of stay among patients who received outpatient surgery at a freestanding ambulatory surgery center.
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Affiliation(s)
- Stephany Alonso
- From the Department of Materials Science and Engineering, University of California, Irvine
| | | | - Ruth S Waterman
- Department of Anesthesiology, Division of Perioperative Informatics
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The association of nitrous oxide on length of stay in the postanesthesia care unit: a retrospective observational study. Can J Anaesth 2021; 68:1630-1640. [PMID: 34406608 DOI: 10.1007/s12630-021-02067-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 06/04/2021] [Accepted: 06/16/2021] [Indexed: 10/20/2022] Open
Abstract
PURPOSE To assess whether intraoperative use of nitrous oxide (N2O) as an adjunct to general anesthesia is associated with a shorter length of stay in the postanesthesia care unit (PACU). METHODS We analyzed data from adult patients who underwent non-cardiothoracic surgery under general anesthesia between May 2008 and December 2018. We assessed the association between intraoperative low- and high-dose N2O and PACU length of stay. RESULTS A total of 148,284 patients were included in the primary analysis. After adjusting for a priori defined confounders, a high dose of N2O significantly decreased PACU length of stay, with a calculated difference of -9.1 min (95% confidence interval [CI], -10.5 to -7.7; P < 0.001). Patients who received high-dose N2O had a lower incidence of both short- and prolonged-duration of intraoperative hypotension (adjusted odds ratio [aOR], 0.85; 95% CI, 0.83 to 0.88; P < 0.001 and aOR, 0.76; 95% CI, 0.73 to 0.80; P < 0.001, respectively) and received a lower total intraoperative vasopressor dose (-0.04 mg of norepinephrine equivalents; 95% CI, -0.06 to -0.01; P = 0.01). The effect of high-dose N2O on PACU length of stay was modified by surgical complexity (adjusted absolute difference: -26.1 min; 95% CI, -29.2 to -23.1; P < 0.001; P for interaction < 0.001), and most pronounced in patients who underwent complex surgery and received intraoperative antiemetic therapy (adjusted absolute difference: -38.9 min; 95% CI, -43.1 to -34.6; P < 0.001; P for interaction < 0.001). CONCLUSIONS Nitrous oxide was dose-dependently associated with a decreased PACU length of stay. The effect was clinically relevant (> 30 min difference) in patients who underwent complex surgical procedures and received intraoperative antiemetic therapy.
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Wachtendorf LJ, Schaefer MS, Santer P, Azimaraghi O, Obeidat SS, Friedrich S, Zucco L, Woo A, Nabel S, Sundar E, Eikermann M, Ramachandran SK. Association between preoperative administration of gabapentinoids and 30-day hospital readmission: A retrospective hospital registry study. J Clin Anesth 2021; 73:110376. [PMID: 34098392 DOI: 10.1016/j.jclinane.2021.110376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 04/28/2021] [Accepted: 04/30/2021] [Indexed: 10/21/2022]
Abstract
STUDY OBJECTIVE To evaluate the effectiveness of preoperative gabapentinoid administration. DESIGN Retrospective hospital registry study. SETTING Tertiary referral center (Boston, MA). PATIENTS 111,008 adult non-emergency, non-cardiac surgical patients between 2014 and 2018. INTERVENTIONS Preoperative administration of gabapentinoids (gabapentin or pregabalin). MEASUREMENTS We tested the primary hypothesis that preoperative gabapentinoid use was associated with lower odds of hospital readmission within 30 days. Contingent on this hypothesis, we examined whether lower intraoperative opioid utilization mediated this effect. Secondary outcome was postoperative respiratory complications. MAIN RESULTS Gabapentinoid administration was associated with lower odds of readmission (adjusted odds ratio [ORadj] 0.80 [95% CI, 0.75-0.85]; p < 0.001). This effect was in part mediated by lower intraoperative opioid utilization in patients receiving gabapentinoids (8.2% [2.4-11.5%]; p = 0.012). Readmissions for gastrointestinal disorders (ORadj 0.74 [0.60-0.90]; p = 0.003), neuro-psychiatric complications (ORadj 0.66 [0.49-0.87]; p = 0.004), non-surgical site infections (ORadj 0.68 [0.52-0.88; p = 0.004) and trauma or poisoning (ORadj 0.25 [0.16-0.41]; p < 0.001) occurred less frequently in patients receiving gabapentinoids. The risk of postoperative respiratory complications was lower in patients receiving gabapentinoids (ORadj 0.77 [0.70-0.85]; p < 0.001). Lower doses of pregabalin (< 75 mg) and gabapentin (< 300 mg) compared to both, no and high-dose administration of gabapentinoids, were associated with a lower risk of postoperative respiratory complications (ORadj 0.61 [0.50-0.75]; p < 0.001 and ORadj 0.70 [0.53-0.92]; p = 0.012, respectively). These lower gabapentinoid doses prevented 30-day readmission (ORadj 0.74 [0.65-0.85]; p < 0.001). The results were robust in several sensitivity analyses including surgical procedure defined subgroups and patients undergoing ambulatory surgery. CONCLUSIONS The preoperative use of pregabalin and gabapentin, up to doses of 75 and 300 mg respectively, mitigates the risks of hospital readmission and postoperative respiratory complications which can in part be explained by lower intraoperative opioid use. Further research is warranted to elucidate mechanisms of the preventive action.
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Affiliation(s)
- Luca J Wachtendorf
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA; Department of Anesthesiology, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY, USA.
| | - Maximilian Sebastian Schaefer
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA; Department of Anesthesiology, Duesseldorf University Hospital, Duesseldorf, Germany.
| | - Peter Santer
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
| | - Omid Azimaraghi
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA; Department of Anesthesiology, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY, USA.
| | - Salameh Sameh Obeidat
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
| | - Sabine Friedrich
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
| | - Liana Zucco
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
| | - Albert Woo
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
| | - Sarah Nabel
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
| | - Eswar Sundar
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
| | - Matthias Eikermann
- Department of Anesthesiology, Montefiore Medical Center, Albert Einstein College of Medicine, Bronx, NY, USA; Klinik für Anästhesiologie und Intensivmedizin, Universität Duisburg-Essen, Essen, Germany.
| | - Satya Krishna Ramachandran
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
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Ma H, Wachtendorf LJ, Santer P, Schaefer MS, Friedrich S, Nabel S, Ramachandran SK, Shen C, Sundar E, Eikermann M. The effect of intraoperative dexmedetomidine administration on length of stay in the post-anesthesia care unit in ambulatory surgery: A hospital registry study. J Clin Anesth 2021; 72:110284. [PMID: 33831766 DOI: 10.1016/j.jclinane.2021.110284] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 03/13/2021] [Accepted: 03/14/2021] [Indexed: 12/30/2022]
Abstract
STUDY OBJECTIVE Dexmedetomidine, which is commonly used for procedural sedation and as adjunct to general anesthesia for ambulatory procedures, may affect patient discharge from the post-anesthesia care unit (PACU). We hypothesized that intraoperative dexmedetomidine use in ambulatory surgery is associated with delayed discharge from the PACU and that this is modified by surgical duration and anesthesia type. DESIGN Retrospective cohort study. SETTING Academic medical center. PATIENTS 130,854 adult patients undergoing ambulatory surgery between 2008 and 2018. INTERVENTIONS Intraoperative administration of dexmedetomidine. MEASUREMENTS The primary outcome was PACU length of stay. In secondary and exploratory analyses, we examined dose-dependency, effect modification by duration of surgery and anesthesia type, effects of timing of dexmedetomidine administration, and PACU discharge delays. MAIN RESULTS Dexmedetomidine was associated with a prolonged PACU length of stay (adjusted absolute difference [ADadj] 15.0 min; 95%CI 12.7-17.3; p < 0.001). This effect was dose-dependent (p-for-trend < 0.001), magnified in surgeries of less than one hour (ADadj 20.7 min; 95%CI 16.7-24.7; p < 0.001) and in patients undergoing monitored anesthesia care compared to general anesthesia (ADadj 16.8 min; 95%CI 14.1-19.6; p < 0.001). The effect was more pronounced if dexmedetomidine was administered within the last 60 min of surgery (ADadj 18.7 min; 95%CI 15.7-21.7; p < 0.001). Dexmedetomidine was associated with discharge delays due to cardiovascular complications (ORadj 2.27; 95%CI 1.59-3.24; p < 0.001) and over-sedation (ORadj 1.28; 95%CI 1.11-1.48; p < 0.001). In patients who received dexmedetomidine (n = 2901), the use of bolus doses only versus the combination of bolus and infusions, magnified the effects on PACU length of stay (ADadj 29.5 min per μg/kg; 95%CI 17.3-41.8 versus 18.1 min per μg/kg; 95%CI 11.4-24.8; p < 0.001). CONCLUSIONS The intraoperative administration of dexmedetomidine was dose-dependently associated with a prolonged PACU length of stay. Clinicians should judiciously titrate dexmedetomidine, especially when using this long-acting drug for monitored anesthesia care for shorter procedures.
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Affiliation(s)
- Haobo Ma
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
| | - Luca J Wachtendorf
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
| | - Peter Santer
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
| | - Maximilian S Schaefer
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA; Department of Anesthesia, Duesseldorf University Hospital, Duesseldorf, Germany.
| | - Sabine Friedrich
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Sarah Nabel
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
| | - Satya Krishna Ramachandran
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
| | - Changyu Shen
- Medical Data Science and Analytics, Biogen Inc, Cambridge, MA, USA.
| | - Eswar Sundar
- Department of Anesthesia, Critical Care and Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
| | - Matthias Eikermann
- Klinik für Anästhesiologie und Intensivmedizin, Universität Duisburg-Essen, Essen, Germany; Department of Anesthesiology, Albert Einstein College of Medicine, Montefiore Medical Center, Bronx, NY, USA.
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