1. 1. Cunningham AJ, Brull SJ. Laparoscopic Cholecystectomy: Anesthetic implications. Anaesth Analg 1993; 76:1120-33.
2. Intramuscularly administered dexmedetomidine attenuates haemodynamic and stress responses to gynecologic laparoscopy;Aho;Anesth Analg,1992
3. 3. Feig BW, Berger DH, Doughtery TB, Dupuis JF, His B, Hickey RC, et al. Pharmacologic intervention can reestablish baseline hemodynamic parameters during laparoscopy. Surgery 1994; 116:733-9.
4. 4. Malek J, Knor J, Kurzova A, Lopourova M. Adverse hemodynamic changes during laparoscopic cholecystectomy and their possible suppression with clonidine premedication: Comparison with intravenous and intramuscular premedication. RozhlChir 1999;78:286-91.
5. 5. Sung CS, Lin SH, Chan KH, Chang WK, Chow LH, Lee TY. Effect of oral clonidine premedication on perioperative haemodynamic response and postoperative analgesic requirement for patients undergoing laparoscopic cholecystectomy. Acta Anaesthesiol Sin 2000; 38:23-9.