Abstract
To evaluate the dynamic changes in tracheal cuff pressure before and after four clinical nursing procedures including sputum suction, oral care, atomisation inhalation, and turning over, and thus provide references for the adjustment time of cuff pressure in clinical practice. Cuff pressure must be kept within the range of 25-30cmH2 O to ensure effective ventilation and prevent aspiration, while maintaining tracheal bloodflowperfusion. A prospective observational study. The cuff pressure of 56 intubated patients was adjusted to 28-30cmH2 O. A cuff pressure monitor was used to continuously monitor cuff pressure changes before and after four clinical nursing procedures (sputum suction, oral care, atomisation inhalation, and turning over) and the cuff pressures at various time points were compared. The semi-quantitative cough strength score (SCSS) was used to evaluate cough strength during sputum suction and the effect of cough strength on cuff pressure during sputum suction. This study followed the STROBE checklist for cross-sectional studies. The cuff pressures during the four clinical nursing procedures of sputum suction, atomisation inhalation, turning over, and oral care, all temporarily increased (p<0.001) and decreased to varying degrees 20min later (p<0.001). Among them, the cuff pressure rose the highest under a state of moderate or strong coughing during sputum suction (78.38±12.13cmH2 O) and dropped the most at 20min after the procedure (21.71±4.80cmH2 O). The four clinical nursing procedures of sputum suction, atomisation inhalation, turning over, and oral care can all cause different degrees of cuff pressure drop. Thedecision on whether the cuff pressure needs to be corrected depends on the specific situation. During clinical practice, the cuff pressure can be individually corrected according to different clinical nursing procedures, which can increase the qualified rate of cuff pressure and reduce the workload of nurses.
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