Publications by authors named "Claude Meistelman"

Article Synopsis
  • * Conducted across 40 hospitals in France, the trial involved 2,222 patients who were randomly assigned to either keep using RASIs until surgery or stop them 48 hours prior.
  • * The results showed no significant difference in all-cause mortality or major complications within 28 days after surgery between the two groups, suggesting that either strategy can be safely applied.
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Background: Accidental awareness during general anesthesia (AAGA) is defined as an unexpected awareness of the patient during general anesthesia. This phenomenon occurs in 1%-2% of high-risk practice patients and can cause physical suffering and psychological after-effects, called posttraumatic stress disorder. In fact, no monitoring techniques are satisfactory enough to effectively prevent AAGA; therefore, new alternatives are needed.

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Introduction: Dexamethasone is a drug used to prolong the postoperative analgesia in children after peripheral nerve blockade, although the dose usually used (0.2 mg/kg) has not been studied yet. This study is a monocentric, prospective, randomised, placebo-controlled, double-blinded study in a university hospital in France.

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Article Synopsis
  • A group of sixteen experts updated the 1999 French guidelines on muscle relaxants and their reversal in anesthesia, ensuring independence from industrial funding and adhering to strict conflict of interest protocols.
  • They utilized the GRADE® system to evaluate the quality of evidence for each recommendation, emphasizing the risks of relying on low-quality evidence.
  • The panel addressed eight key questions regarding the necessity and monitoring of muscle relaxants in various scenarios and special populations, focusing on best practices for airway management and patient safety.
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Purpose Of Review: The purpose of this review is to discuss the optimal use of neuromuscular blocking agents (NMBA) during ambulatory surgery, and to provide an update on the routine use of neuromuscular monitoring and the prevention of residual paralysis.

Recent Findings: The number of major surgical procedures performed in ambulatory patients is likely to increase in the coming years, following the development of laparoscopic and thoracoscopic procedures. To successfully complete these procedures, the proper use of NMBA is mandatory.

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Background: The prospective observational European multicentre cohort study (POPULAR) of postoperative pulmonary complications (NCT01865513) did not demonstrate that adherence to the recommended train-of-four ratio (TOFR) of 0.9 before extubation was associated with better pulmonary outcomes from the first postoperative day up to hospital discharge. We re-analysed the POPULAR data as to whether there existed a better threshold for TOFR recovery before extubation to reduce postoperative pulmonary complications in patients who had quantitative neuromuscular monitoring (87% acceleromyography).

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Background: The optimal dose of cefoxitin for antibiotic prophylaxis in obese patients remains uncertain. We evaluated the adequacy of a 4-gram dosing regimen of cefoxitin against the most frequent pathogens that infect patients undergoing bariatric surgery.

Methods: This observational prospective study included obese patients who required bariatric surgery and a 4-gram dose of cefoxitin as an antibiotic prophylaxis.

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Background: Accidental Accidental awareness during general anesthesia (AAGA) occurs in 1-2% of high-risk practice patients and is a cause of severe psychological trauma, termed post-traumatic stress disorder (PTSD). However, no monitoring techniques can accurately predict or detect AAGA. Since the first reflex for a patient during AAGA is to move, a passive brain-computer interface (BCI) based on the detection of an intention of movement would be conceivable to alert the anesthetist.

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Article Synopsis
  • There is ongoing debate on whether deep neuromuscular block (NMB) provides better surgical conditions compared to moderate NMB during laparoscopic surgeries, specifically in obese patients.
  • A controlled study was conducted at a university hospital in France where patients undergoing laparoscopic gastric bypass surgery were assessed twice—first with moderate NMB and then randomized to either deep or moderate NMB for a second evaluation of their surgical conditions.
  • Results indicated that out of 89 patients, improvement in surgical conditions was noted after switching to deep NMB, showing potential benefits for such surgical procedures in the obese population.
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  • A multicentre study across 28 European countries investigated whether neuromuscular blocking agents during general anaesthesia lead to increased postoperative pulmonary complications.
  • The study included over 22,000 patients and found that 7.6% who received these agents experienced more complications, with adjusted odds suggesting a significant risk increase.
  • Results indicated that only a small percentage of high-risk patients were anaesthetized without these agents, and the use of neuromuscular monitoring and reversal agents did not significantly alter complications.
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Purpose: Shortening the duration of antibiotic therapy (ABT) is a key measure in antimicrobial stewardship. The optimal duration of ABT for treatment of postoperative intra-abdominal infections (PIAI) in critically ill patients is unknown.

Methods: A multicentre prospective randomised trial conducted in 21 French intensive care units (ICU) between May 2011 and February 2015 compared the efficacy and safety of 8-day versus 15-day antibiotic therapy in critically ill patients with PIAI.

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Purpose Of Review: Sugammadex is a selective relaxant-binding agent that is designed to encapsulate rocuronium and chemically similar steroidal muscle relaxants such as vecuronium. This review summarizes recent information on the use of sugammadex in clinical practice.

Recent Findings: The main advantages of sugammadex when compared with conventional anticholinesterase agents are a much faster recovery time and its unique ability to reverse rapidly and efficiently, for the first time, deep levels of neuromuscular blockade.

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Background: Notification of sugammadex has been supplemented with a section on hemostasis, including a longer clotting time in the first minutes following injection, without any documented clinical consequences. The objective of this observational study was to analyze the effects of sugammadex administration on routine coagulation tests and bleeding in the clinical setting.

Methods: After Institutional Review Board approval, a prospective observational study was conducted between January and December 2011.

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Muscle relaxants are used in the perioperative period to aid in endotracheal intubation, facilitate surgical exposure, and in the critical care setting for prolonged relaxation. Until now, the only mechanism to reverse their effect is acetylcholinesterase inhibitors that result in excess parasympathetic activity and require the second drug to prevent this side effect. Additionally, the onset and degree of neuromuscular antagonism are often unpredictable and unreliable.

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The choice of volume expander for fluid resuscitation in hemorrhagic shock is still debated. Changes in plasma viscosity (PV) are barely investigated while PV modulates functional capillary density, microcirculation and organ function. The present study evaluated the impact of 2 strategies of fluid resuscitation in hemorrhagic shock in pigs.

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the selective relaxant binding agents. Sugammadex can reverse residual paralysis by encapsulating free circulating non depolarizing muscle relaxants. The mains advantages of sugammadex when compared with conventional anticholinesterase agents are a much faster recovery time and the unique ability, for the first time, to reverse rapidly and efficiently deep levels of neuromuscular blockade.

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Background: Car sickness is a frequent and potentially disabling problem, commonly related to a theory of sensory conflict, in particular visuo-vestibular, and between actual and anticipated sensory signals. This study aimed to evaluate predictors of motion sickness (MS) in rally car co-drivers exposed to various accelerations.

Methods: The subjects were 85 rally co-drivers (21 women) who filled in a questionnaire investigating MS symptoms in 4 situations: 1) special stages (competition itself); 2) special stages reconnaissance; 3) reading a book in the car; and 4) rear-seat passenger.

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Purpose Of Review: Sugammadex belongs to a new class of drugs termed selective relaxant binding agents and is now available for clinical use in over 50 countries. Because of its innovative mechanism of action, reversal of rocuronium or vecuronium becomes independent of the degree of residual neuromuscular blockade. Deep or intense neuromuscular blockade now can rapidly and predictably be reversed.

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Background: Acceleromyography is regularly used as an isolated test to detect residual paralysis. The performance of acceleromyography, however, has not been investigated for the setting where calibration is impossible. This study first evaluated the reliability of a single acceleromyographic train-of-four (TOF) ratio (T4/T1) to detect residual paralysis and compared it with tactile estimation of fade after double-burst stimulation and 100-Hz, 5-s tetanus.

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