Clinical study predicting prolonged postoperative ileus after laparoscopic colorectal cancer surgery with intelligent bowel sound auscultation system

Figure 6 Analysis of the characteristics of bowel sounds and operation time on the cut-off values for predicting prolonged postoperative ileus. A: Number of bowel sounds predictive value for prolonged postoperative ileus (PPOI), cut-off value is 1.201 counts per minute; sensitivity 56.67%, specificity 80.58%; B: Recovery time of bowel sounds predictive value for PPOI, cut-off value is 16.9 hours; sensitivity 90.00%, specificity 43.75%; C: Bowel sound vibration amplitude predictive value for postoperative PPOI, no statistically significant difference; D: Operative time predictive value for PPOI, cut-off value is 205 minutes; sensitivity 90.00%, specificity 38.83%.