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Erschienen in: Canadian Journal of Anesthesia/Journal canadien d'anesthésie 2/2024

28.11.2023 | Reports of Original Investigations

Change in stroke volume during alveolar recruitment maneuvers through transient continuous positive airway pressure or stepwise increase in positive end expiratory pressure in anesthetized patients: a prospective randomized double-blind study

verfasst von: Kevin Dupont, MD, Valentin Lefrançois, MD, Antoine Delahaye, MD, Marine Sanz, MD, Rémi Hestin, MD, Théophane Doublet, MD, Jean-Jacques Parienti, MD, PhD, Jean-Luc Hanouz, MD, PhD

Erschienen in: Canadian Journal of Anesthesia/Journal canadien d'anesthésie | Ausgabe 2/2024

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Abstract

Purpose

Intraoperative alveolar recruitment maneuvers (ARM) used during protective ventilation strategy may have severe adverse hemodynamic effects, reported mainly during abrupt continuous positive airway pressure (CPAP). Stepwise increase and decrease in positive end expiratory pressure (PEEP) may be used. We compared the hemodynamic effects of these two maneuvers.

Methods

We enrolled patients scheduled for intermediate to high-risk surgery with continuous arterial pressure and stroke volume (esophageal Doppler) monitoring in a prospective, single-centre, randomized, double-blind study. After induction of anesthesia, we ensured preload independence of stroke volume before an ARM was randomly performed: 30 cm H2O CPAP for 30 sec (CPAP group) or stepwise increase in PEEP from 8 to 20 cm H2O with inspiratory pressure of 10 cm H2O followed by a stepwise decrease in PEEP from 20 to 8 cm H2O (STEP group). The primary outcome was the relative variation in stroke volume.

Results

Thirty-five patients were included in the CPAP and STEP groups. Mean (standard deviation) relative variation in stroke volume was −57 (24)% in the CPAP group and −32 (24)% in the STEP group (difference, −25; 95% confidence interval, −37 to −14; P < 0.001). Changes in systolic, mean, and diastolic arterial pressure over time were not different between groups. The ARM was stopped because of a systolic arterial pressure < 70 mm Hg in four patients in the CPAP group and in one patient in the STEP group.

Conclusions

Alveolar recruitment maneuvers through stepwise increase and decrease in PEEP have a better hemodynamic tolerance than transient CPAP.

Trial registration

ClinicalTrials.gov (NCT04802421); first submitted 15 March 2021.
Literatur
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Metadaten
Titel
Change in stroke volume during alveolar recruitment maneuvers through transient continuous positive airway pressure or stepwise increase in positive end expiratory pressure in anesthetized patients: a prospective randomized double-blind study
verfasst von
Kevin Dupont, MD
Valentin Lefrançois, MD
Antoine Delahaye, MD
Marine Sanz, MD
Rémi Hestin, MD
Théophane Doublet, MD
Jean-Jacques Parienti, MD, PhD
Jean-Luc Hanouz, MD, PhD
Publikationsdatum
28.11.2023
Verlag
Springer International Publishing
Erschienen in
Canadian Journal of Anesthesia/Journal canadien d'anesthésie / Ausgabe 2/2024
Print ISSN: 0832-610X
Elektronische ISSN: 1496-8975
DOI
https://doi.org/10.1007/s12630-023-02644-7

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