Effects of Ultrasound-guided Recruitment Manoeuvres on Postoperative Pulmonary Complications in OSA Patients Undergoing Total Laparoscopic Hysterectomy
The First Affiliated Hospital of Xinxiang Medical College
90 participants
May 2, 2025
INTERVENTIONAL
Conditions
Summary
This study aims to evaluate the lung-protective effects of ultrasound-guided lung recruitment maneuvers in patients with OSA undergoing total laparoscopic hysterectomy and to explore the efficacy of EELV measurement in assessing the effectiveness of these maneuvers.
Eligibility
Inclusion Criteria5
- Age ≥ 18 years;
- Scheduled for elective total laparoscopic hysterectomy;
- American Society of Anesthesiologists (ASA) I to III;
- BMI > 28 kg/m²;
- STOP-BANG score ≥ 3.
Exclusion Criteria4
- Abnormal findings on preoperative chest X-ray or CT, such as atelectasis, pneumothorax, thoracic deformity, pleural effusion, or neuromuscular diseases;
- Pre-existing severe pulmonary diseases;
- Severe cardiac arrhythmias or a history of cardiac surgery;
- Allergy to any medications used in the study.
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Interventions
The APL valve on the anaesthesia machine will be adjusted to 30 cmH₂O, and the rapid oxygen inflow valve will be pressed to increase the pressure to the maximum, maintaining the pressure for 30 seconds.
Starting from 5 cmH₂O, PEEP will be titrated upwards in 5 cmH₂O increments every 30 seconds until a maximum of 30 cmH₂O is reached. After maintaining for 40 seconds, PEEP will be decreased by 5 cmH₂O every 30 seconds until it returns to the pre-recruitment level.
Lung ultrasound will be performed on patients. If any lung region has an LUS score ≥ 2, ultrasound-guided RM will be performed; otherwise, no operation will be conducted. After the ultrasound examination, the probe will be positioned over the lung region exhibiting the most severe aeration loss (highest LUS) to guide the RMs. The ventilator will be set to pressure-controlled ventilation (PCV), maintaining the inspiratory pressure at 40 cmH₂O. PEEP will be gradually increased from 5 cmH₂O, with increments of 5 cmH₂O every 5-10 seconds, until ultrasound shows no atelectatic areas. The pressure will be maintained at 40 cmH₂O for 40 seconds. An airway pressure ceiling of 40 cmH₂O was established, and the pressure and the time used for the RM will be recorded.
Locations(1)
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NCT07362680