Evaluation of Unilateral Ultrasound Guided Paravertebral Block as Perioperative Analgesia For Lower Limb-Sparing Surgery In Adult Cancer Patients

"In both groups, one reading of mean arterial pressure and heart rate were taken before induction of general anaesthesia and were defined as baseline readings and then were recorded intra-operatively at 15 min intervals.~Additional bolus doses of fentanyl 0.5µg/kg were given when the mean arterial blood pressure or heart rate raised above 20% of baseline levels."