effects of duration of propofol injection on hemodynamics

ABSTRACT

The aim of study was to see whether increasing the time of injection of standard dose of Propofol during induction can prevent fall in blood pressure in female patients; as is commonly observed with this anesthetic agent. Comparative, non-interventional, prospective, and randomized and single blind study. The study was carried out on female in-patients admitted and surgically operated at a specialized, tertiary care hospital and was completed with in 6-months. The hemodynamic effects of Propofol were compared in three groups of patients undergoing minor surgical procedures. Each group comprised of 25 patients. A 2 mg/kg Propofol was administered for 30, 60 and 120 seconds in patients of group-A, group-B and group-C respectively. Baseline heart rate, systolic blood pressure, diastolic blood pressure and mean arterial blood pressures were recorded before induction of anesthesia. The same hemodynamic variables were recorded after induction at one-minute intervals for 10-minutes. Anesthesia was maintained with 1.5% enflurane and 60% nitrous oxide in oxygen. Complications such as pain on injection, dystonic movements, erythema, laryngeal spasm, episodes of desaturation, hypoventilation and the number of additional boluses required to induce hypnosis were also recorded. The fall in blood pressure was statistically insignificant between the three groups of patients. The incidence of dystonic movements was the highest in group-A while pain on injection was highest in group-C. Additional boluses of Propofol to induce hypnosis were required for patients in group-B and group-C. Varying the speed of injection of Propofol during induction of anesthesia in adult female patients does not cause any major difference in the drop of their heart rate, systolic blood pressure, diastolic pressure and mean arterial pressure