Comparative study of 0.5% Isobaric bupivacaine(plain)  and 0.5% Hyperbaric  bupivacaine(Heavy) in Lower Limb/Lower abdominal and Pelvic surgeries.

Dr.Kaluvala Prasad Rao; Dr.Sapna Nikhar; Prof.Gopinath Ramachandran

Volume : VI, Issue : X, October - 2016

Comparative study of 0.5% Isobaric bupivacaine(plain) and 0.5% Hyperbaric bupivacaine(Heavy) in Lower Limb/Lower abdominal and Pelvic surgeries.

Dr. Kaluvala Prasad Rao, Dr. Sapna Nikhar, Prof. Gopinath Ramachandran

Abstract :

BACKGROUND AND AIMS: The comparative study of 0.5% Isobaric bupivacaine and 0.5% Hyperbaric bupivacaine in lower limb/ lower abdominal and pelvic surgeries was studied to compare for the following aims ? I) Onset of sensory and motor blockade II) Duration of sensory and motor blockade III) Intensity of motor blockade(assessed by omage scale) IV) Level of sensory block achieved V) Pre–operative/intra–operative/post–operative haemodynamic changes(PR/BP/MAP) VI) Any incidence of complications– and inturn assess the role and usefulness of 0.5% Isobaric bupivacaine in clinical practice. MATERIALS AND METHODS: This study was conducted in two groups in 100 patients in the age group of 20–50Years of ASA–I status who weighted between 40–70Kgs and were of height 5’–3’’ to 5’–6’’ after pre–loading with one litre of ringer lactate. A sterile 25G quinkie tip spinal needle, 3ml of 0.5% isobaric or 0.5% hyperbaric bupivacaine(15mg) and an autoclaved spinal pack was used. Boyles anaesthetic machine with laryngoscope and endotracheal tubes were kept as standby before undertaking the procedure. RESULTS: With 0.5% hyperbaric bupivacaine,the onset of sensory/motor blockade was quicker with achievement of higher level and the duration of motor blockade was prolonged. The degree of motor blockade was observed to be same in both the groups. The haemodynamic/cardiovascular stability was better with 0.5% isobaric bupivacaine. CONCLUSION: As haemodynamic stability was seen better with 0.5% isobaric bupivacaine,it is prudent to use it in lower limb/lower abdominal and pelvic surgeries of less duration of time in patients with higher ASA status and 0.5% hyperbaric bupivacaine in surgeries where a higher level of sensory/motor blockade and more duration of time is required.