The goal of this clinical trial is to learn which positioning strategy works better to prevent postoperative hypoxemia in surgical patients: semirecumbent positioning or lateral positioning. It will also learn about the safety and effectiveness of these two positioning approaches. The main questions it aims to answer are: Does semirecumbent positioning reduce the incidence of postoperative hypoxemia more effectively than lateral positioning? Does lateral positioning reduce the incidence of postoperative hypoxemia more effectively than semirecumbent positioning? What are the differences in patient comfort and recovery outcomes between these two positioning strategies? Researchers will compare semirecumbent positioning directly to lateral positioning to see which approach is more effective in preventing postoperative hypoxemia. Participants will: Be randomly assigned to either semirecumbent positioning or lateral positioning after surgery Have their oxygen levels and breathing monitored regularly during the postoperative period Receive standard post-surgical care with their assigned positioning strategy Be assessed for comfort levels and any positioning-related complications Have their recovery progress tracked throughout their hospital stay.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
1,200
Patients allocated to lateral positioning were placed at 90° on a horizontal bed, supported with a pillow to maintain neutral alignment of the spine and avoid hyperextension or forward flexion of the neck. No preference was specified for left or right lateral decubitus positioning, allowing flexibility based on patient comfort and surgical requirements.
Patients in the semi-recumbent position were placed in the bed and the head of the bed was raised by 30 °, allowing flexibility based on patient comfort and surgical requirements.
Incidence of hypoxaemia
Defined as any occurrence of oxygen saturation (SpO2) ≤90% for at least five seconds during the initial 10 minute period after positioning.
Time frame: Within 24 hours after the surgery was completed
Rrequency of airway rescue interventions
Increased oxygen flow, jaw thrust manoeuvre, mask ventilation
Time frame: Within 24 hours after the surgery was completed
incidence of severe hypoxaemia
oxyhemoglobin saturation ≤85%
Time frame: Within 24 hours after the surgery was completed
Lowest oxygen saturation
Defined as the oxygenation nadir during 10 minutes of continuous measurement.
Time frame: Within 24 hours after the surgery was completed
Duration of stay in the post-anaesthesia care
Duration of stay in the post-anaesthesia care
Time frame: Perioperative/Periprocedural
wound pain
VAS scale was used to measure pain intensity. The VAS uses a 10 cm line with endpoint descriptors such as 'no pain' marked at the left end of the line and 'worst pain imaginable' marked at the right end. A VAS score between 4-7 represents "mild pain", a score between 4-7 represents "moderate pain" and a score between 8-10 represents "severe pain".
Time frame: Perioperative/Periprocedural
Adverse events
hypotension, arrhythmia, and some other adverse events.
Time frame: Perioperative/Periprocedural
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