Shibata et al (2007) assessed the extent of ultrasound-guided TAPB by pinprick in 26 patients undergoing laparoscopic gynaecological surgeries and found that the mean upper and lower level of sensory block at 30 mins.
The finding of prolonged postoperative analgesia after USG TAPB is similar to studies by other authors.
Another limiting factor is that although USG TAPB increases efficiency and safety of block it has a longer learning curve and so results are user dependent.
The duration of analgesia in TAPB was considered to be from the time of recession of sensory level below T10 on the nonoperated side to pain score of 4 (i.
At the end of study, data were pooled and analyzed using SPSS version 17 and graphpad version 5 and conclusion was drawn regarding the effectiveness of TAPB in postoperative analgesia and relative efficacy of the two drugs by applying Anova test, Student t test, Tukey test.
Using local anaesthetic agents in TAPB is a simple and effective analgesic technique, appropriate for surgical procedures where parietal pain is a significant component of postoperative pain.
25% bupivacaine used in TAPB produced effective and prolonged postoperative analgesia when compared with placebo in patients undergoing unilateral lower abdominal surgeries.
10) Moreover it may not always be possible to use ultrasound guided techniques for administering TAPB where such facilities are not available.
14) Moreover ultrasound machine may not be available at all places especially in peripheral health centers where the blind technique alone is the option for giving TAPB.
Unlike most other studies, we used TAPB as sole method of providing postoperative analgesia.
5 % Ropivacaine compared with saline as the drugs under study for use in unilateral TAPB considering Ropivacaine to be approximately half as potent as Bupivacaine.