Postoperative pain and rescue Analgesia required
Out of the total patients included in the study, 16 patients had a
successful block. All patients with a successful block had a
postoperative visual analogue scale score less than 4 in the initial 8h
(see Figure 3A and Figure 3B). The average intraoperation sufentanil
consumption was 10.8±3.33μg. Intraoperation sufentanil consumption
between successful and unsuccessful blocks(P =0.2579) showed no
difference. However, the mean time to 1st rescue analgesic was 9.2±2.71
h. The time to 1st rescue analgesic between successful and unsuccessful
blocks(P =0.0024) was significantly different. The time to 1st
analgesic request was moderately positively correlated with administered
local anesthetic concentration, with the Spearman rank correlation r
being 0.4865. This value of r was found to be statistically
significant(P =0.0074)(see Figure 3C and D).