Trial reportBMC anesthesiology2022
Effects of ultrasound-guided alveolar recruitment manoeuvres compared with sustained inflation or no recruitment manoeuvres on atelectasis in laparoscopic gynaecological surgery as assessed by ultrasonography: a randomized clinical trial.
Trial report in BMC anesthesiology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 3 registered trials, which are not on this map. Cited by 10 papers, 2 of them syntheses that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Effect of Different Inspired Oxygen Concentrations on Intraoperative Recruitment Outcomes in Patients Undergoing Abdominal Surgery
Optimal Positive End-Expiratory Pressure (PEEP) Level for Minimizing the Risk of Postoperative Atelectasis According to Lung Ultrasound Monitoring: A Retrospective Cohort Study
Effect of Positive End-Expiratory Pressure (PEEP) Level on Postoperative Oxygenation and Lung Aeration Assessed by Lung Ultrasound Monitoring: A Multicenter Randomized Controlled Trial (ULTRASVENT-2)
Who cites it
10 citing papers in PubMed, 2 syntheses or guidelines pooled it, 27 citations in OpenAlex.
- Non-drug perioperative interventions to reduce postoperative pulmonary complications after abdominal surgery: systematic review and meta-analysis.BMJ (Clinical research ed.) · 2026Pooled it
- Intra-operative ventilation strategies and their impact on clinical outcomes: a systematic review and network meta-analysis of randomised trials.Anaesthesia · 2025Pooled it
- Impact of Individualized Positive End-Expiratory Pressure Guided by Driving Pressure on Postoperative Atelectasis Assessed by Lung Ultrasound in Laparoscopic Surgery Patients: A Randomized Controlled Trial.Therapeutics and clinical risk management · 2026Trial
- Trial
- The effect of ultrasound-guided lung recruitment maneuvers on postoperative atelectasis: a systematic review and meta-analysis of randomized controlled trials.Frontiers in cardiovascular medicine · 2026Review
- Point-of-care Lung ultrasound assessment of positional changes in COVID-19 ARDS in intensive care: A case report and review of the literature.Physiological reports · 2025Review
- Lung re-aeration assessment by ultrasound during mechanical ventilation: Current knowledge of literature review.Multidisciplinary respiratory medicine · 2025Article
- Article
- Article
- An anesthesia-centered bundle to reduce postoperative pulmonary complications: The PRIME-AIR study protocol.PloS one · 2023Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors at 3 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundThe majority of patients may experience atelectasis under general anesthesia, and the Trendelenburg position and pneumoperitoneum can aggravate atelectasis during laparoscopic surgery, which promotes postoperative pulmonary complications. Lung recruitment manoeuvres have been proven to reduce perioperative atelectasis, but it remains controversial which method is optimal. Ultrasonic imaging can be conducive to confirming the effect of lung recruitment manoeuvres. The purpose of our study was to assess the effects of ultrasound-guided alveolar recruitment manoeuvres by ultrasonography on reducing perioperative atelectasis and to check whether the effects of recruitment manoeuvres under ultrasound guidance (visual and semiquantitative) on atelectasis are superior to sustained inflation recruitment manoeuvres (classical and widely used) in laparoscopic gynaecological surgery.
methodsIn this randomized, controlled, double-blinded study, women undergoing laparoscopic gynecological surgery were enrolled. Patients were randomly assigned to receive either lung ultrasound-guided alveolar recruitment manoeuvres (UD group), sustained inflation alveolar recruitment manoeuvres (SI group), or no RMs (C group) using a computer-generated table of random numbers. Lung ultrasonography was performed at four predefined time points. The primary outcome was the difference in lung ultrasound score (LUS) among groups at the end of surgery.
resultsLung ultrasound scores in the UD group were significantly lower than those in both the SI group and the C group immediately after the end of surgery (7.67 ± 1.15 versus 9.70 ± 102, difference, -2.03 [95% confidence interval, -2.77 to -1.29], P < 0.001; 7.67 ± 1.15 versus 11.73 ± 1.96, difference, -4.07 [95% confidence interval, -4.81 to -3.33], P < 0.001;, respectively). The intergroup differences were sustained until 30 min after tracheal extubation (9.33 ± 0.96 versus 11.13 ± 0.97, difference, -1.80 [95% confidence interval, -2.42 to -1.18], P < 0.001; 9.33 ± 0.96 versus 10.77 ± 1.57, difference, -1.43 [95% confidence interval, -2.05 to -0.82], P < 0.001;, respectively). The SI group had a significantly lower LUS than the C group at the end of surgery (9.70 ± 1.02 versus 11.73 ± 1.96, difference, -2.03 [95% confidence interval, -2.77 to -1.29] P < 0.001), but the benefit did not persist 30 min after tracheal extubation.
conclusionsDuring general anesthesia, ultrasound-guided recruitment manoeuvres can reduce perioperative aeration loss and improve oxygenation. Furthermore, these effects of ultrasound-guided recruitment manoeuvres on atelectasis are superior to sustained inflation recruitment manoeuvres.
trial registrationChictr.org.cn, ChiCTR2100042731, Registered 27 January 2021, www.chictr.org.cn .
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.