Comparative evaluation of analgesic sparing efficacy between dexmedetomidine and clonidine used as adjuvant to ropivacaine in thoracic paravertebral block for patients undergoing breast cancer surgery: A prospective, randomized, double-blind study
Anindya Mukherjee1, Anjan Das2, Nairita Mayur2, Chiranjib Bhattacharyya3, Hirak Biswas2, Tapobrata Mitra4, Sandip Roybasunia4, Subrata Kumar Mandal2
1 Department of Anaesthesiology, NRS Medical College, Kolkata, West Bengal, India
2 Department of Anaesthesiology, College of Medicine and Sagore Dutta Hospital, Kolkata, West Bengal, India
3 Department of Anaesthesiology, IPGMER, Kolkata, West Bengal, India
4 Department of Anaesthesiology, Murshidabad Medical College, Berhampore, West Bengal, India
Dr. Anjan Das
174, Gorakshabashi Road, Royal Plaza Apartment (4th Floor, Flat No 1), Nagerbazar, Kolkata - 700 028, West Bengal
Source of Support: None, Conflict of Interest: None
Introduction: Thoracic paravertebral block (TPVB) is an effective method for intra- and post-operative pain management in thoracic surgeries. For a long time, various adjuvants have been tried for prolonging the duration of TPVB.
Objective: In this prospective study, we have compared the analgesic sparing efficacy of dexmedetomidine and clonidine, two α2 adrenergic agonists, administered along with ropivacaine for TPVB for breast cancer surgery patients.
Materials and Methods: Forty-four breast cancer surgery patients undergoing general anesthesia (GA) were randomly divided into Group C and Group D (n = 44 each) receiving preoperative TPVB at T3-5 level with 0.5% ropivacaine solution admixture with clonidine and dexmedetomidine, respectively. Cancer surgery was performed under GA. Intraoperative fentanyl and propofol requirement was compared. Visual analogue scale was used for pain assessment. Total dose and mean time to administration of first rescue analgesic diclofenac sodium was noted. Side effects and hemodynamic parameters were also noted.
Results: Intraoperative fentanyl and propofol requirement was significantly less in dexmedetomidine group than clonidine. The requirement of diclofenac sodium was also significantly less and later in Group D than Group C. Hemodynamics, and side effects were comparable among two groups.
Conclusion: Dexmedetomidine provided better intraoperative as well as postoperative analgesia than clonidine when administered with ropivacaine in TPVB before breast cancer surgery patients without producing remarkable side effects.