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Lung-protective mechanical ventilation for patients undergoing abdominal laparoscopic surgeries: a randomized controlled trial
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Lung-protective mechanical ventilation for patients undergoing abdominal laparoscopic surgeries: a randomized controlled trial
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Lung-protective mechanical ventilation for patients undergoing abdominal laparoscopic surgeries: a randomized controlled trial
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Journal Article
Lung-protective mechanical ventilation for patients undergoing abdominal laparoscopic surgeries: a randomized controlled trial
2021
Overview
Background
Pneumoperitoneum and Trendelenburg position in laparoscopic surgeries could contribute to postoperative pulmonary dysfunction. In recent years, intraoperative lung-protective mechanical ventilation (LPV) has been reportedly able to attenuate ventilator-induced lung injuries (VILI). Our objectives were to test the hypothesis that LPV could improve intraoperative oxygenation function, pulmonary mechanics and early postoperative atelectasis in laparoscopic surgeries.
Methods
In this randomized controlled clinical trial, 62 patients indicated for elective abdominal laparoscopic surgeries with an expected duration of greater than 2 h were randomly assigned to receive either lung-protective ventilation (LPV) with a tidal volume (Vt) of 7 ml kg
− 1
ideal body weight (IBW), 10 cmH
2
O positive end-expiratory pressure (PEEP) combined with regular recruitment maneuvers (RMs) or conventional ventilation (CV) with a Vt of 10 ml kg
− 1
IBW, 0 cmH
2
O in PEEP and no RMs. The primary endpoints were the changes in the ratio of PaO
2
to FiO
2
(P/F). The secondary endpoints were the differences between the two groups in PaO
2
, alveolar-arterial oxygen gradient (A-aO
2
), intraoperative pulmonary mechanics and the incidence of atelectasis detected on chest x-ray on the first postoperative day.
Results
In comparison to CV group, the intraoperative P/F and PaO
2
in LPV group were significantly higher while the intraoperative A-aO
2
was clearly lower. C
dyn
and C
stat
at all the intraoperative time points in LPV group were significantly higher compared to CV group (
p
< 0.05). There were no differences in the incidence of atelectasis on day one after surgery between the two groups.
Conclusions
Lung protective mechanical ventilation significantly improved intraoperative pulmonary oxygenation function and pulmonary compliance in patients experiencing various abdominal laparoscopic surgeries, but it could not ameliorate early postoperative atelectasis and oxygenation function on the first day after surgery.
Trial registration
https://www.clinicaltrials.gov/identifier: NCT04546932 (09/05/2020).
Publisher
BioMed Central,BioMed Central Ltd,Springer Nature B.V,BMC
Subject
/ Adult
/ Aged
/ Alveoli
/ Analysis
/ Elective Surgical Procedures
/ Epidural
/ Female
/ Fentanyl
/ Humans
/ Lungs
/ Male
/ Medicine
/ Patients
/ Positive end-expiratory pressure
/ Positive-Pressure Respiration - methods
/ Postoperative Complications - epidemiology
/ Pulmonary Atelectasis - epidemiology
/ Surgery
