The effect of paravertebral block as a part of multimodal analgesia for laparoscopic cholecystectomy surgery

Aims: In laparoscopic cholecystectomy surgery (LCS), for anesthesiologist and surgeons postoperative analgesia method is still problem.  The aim of this study is to evaluate the effect of preoperative paravertebral block (PVB) application as a part of multimodal analgesia on postoperative pain management in this surgery. 
Methods: In this prospective, randomized, single blinded study, over 18 years old, 70 (ASA I-II) patients who underwent elective LCS were included. In the control group, analgesia was managed with only traditional multimodal analgesia methods, while ultrasound- guided PVB (20 ml of 0.5% bupivacaine,T7 level) was added to multimodal anagesia in the study group. Postoperative pain reduction was evaluated using VAS at 1, 6, 12 and 24 hours postoperatively, and morphine consumption amount was caLCSulated with IV patient-controlled analgesia in the postoperative period. 
Results: Demographic data were similar in both groups. VAS scores at 1 and 6 hours were statistically significantly lower in the PVB group (p<0.05). When evaluated in terms of morphine consumption, it was observed that significantly less morphine was consumed in the PVB group compared to the control group in the first 24-hour period (p< 0.001). Shoulder pain was seen only in 3 patients in the control group. 
Conclusions: In LCS, it was observed that PVB application under the guidance of US increased the effectiveness of multimodal anagesia and decreased postoperative morphine consumption. In addition, problems such as postoperative nausea, vomiting and shoulder pain were less common.