Use of ultrasound-guided abdominal rectus sheath block (RSB) for peritoneal dialysis catheter

Objective To investigate the safety and efficacy of ultrasound-guided abdominal rectus sheath block (RSB) for peritoneal dialysis catheter. Methods Sixty patients with chronic renal insufficiency were included in the study between September 2015 and July 2016, and were randomly divided into the abdominal RSB group (group R) and topical anesthesia group (group L) , n=30 each. Group R underwent ultrasound-guided abdominal RSB at the midpoint line incision, and group L underwent local infiltration anesthesia with unified operation and anesthesiologists. The vital signs at each time point, times of remedial local anesthesia, times of successful catheter and the duration of surgery were recorded. Results There was no statistically significant difference in the general data between the two groups (P>0.05) . There were statistically significant differences in the effect (time) and interation of time and grouping between MAP and HR in the two groups (P<0.05) . The MAP and HR changes in the trend figure showed that during the surgery, especially pulling the rectus abdominis (T4) and at the end of the surgery (T5) , the vital signs in group L significantly fluctuated. When pulling the rectus abdominis (T4) , there were significantly significant differences in MAP and HR between the two groups. Compared with group L, the times of remedial local anesthesia in group R was significantly reduced, and the times of required catheter was less and the operation time was shorter. Conclusion Using ultrasound-guided abdominal RSB is safe and effective for peritoneal dialysis catheter. It can improve the comfort of the patients during the operation, and the procedure is more smooth, which justifies widespread use. Key words: Ultrasonography; Peritoneal dialysis; Rectus abdominis; Nerve block