Effect of Hyperbaric 0.25 % Bupivacaine for Spinal Anesthesia / 대한마취과학회지

In our department we selected 52 patients in ASA Class I, aged from 20 to 60 years old undergoing operation of lower limbs and lower abdomen, lasting 1 to 2 hours of duration. They were divided into 2 groups, group A (30 patients) using 0.5% hyperbaric Tcaine 13 mg (2.6 ml), group B (22 patiens) using 0.25% hyperbaric bupivacaine 10 mg (4 ml), which were injected into intrathecal space. Sensory loss level was significantly higher in group A than in group B. The time taken for the block to reach maximum level was significantly faster in group B. Analgesic duration was significantly shorter in group B. In group B, onset of motor blockade was significantly slower and also, the total duration was significantly shorter. In group A, significant decrease of diastolic and systolic blood presssure were noted. Hyperbaric 0.25% bupivacaine can be used for short timed operation of lower limbs and lower abdomen without changes of cardiovascular system.

Comparative Study of Spinal Anesthesia with 0.5 % Isobaric Bupivacaine and Hyperbaric T-caine / 대한마취과학회지

In our hospital we studied the effects of spinal anesthesia with 0.5% isobarie bupivacaine and hyperbaric T-caine in 60 patients undergoing operation of lower abdomen or lower limbs. The following results were obtained. 1) Maximum level of sensory loss were similar in both groups, the time taken to it was significantly faster in the T-caine group but the duration was significantly longer in the bupivacaine group. 2) Onset time of motor blockade was significantly faster in the T-caine group but the duration was significantly longer in the bupivacaine. 3) The fall in blood pressure appeared faster in the T-caine group but no significant value of difference between the two groups. No significant changes were noted in the pulse rates. 4) Post spinal headache developed in 5 patients out of 60 patients (8.3%). With the results, we can assume that 0.5% isobaric bupivacaine is a good local anesthetic agent for spinal anesthesia in operations of the lower abdomen and lower limbs.

Spinal Anesthesia with 0.5% Isobaric Bupivacaine and 0.4% Hyperbaric Bupivacaine / 대한마취과학회지

Thie study was conducted in the Anesthesiology Department of Chosun University Hospital from March to August 1987 using 0.5% isobaric bupivacaine and 0.4% hyperbaric bupivacaine as agents for spinal anesthesia. The following results were obtained. 1) The segmental heights and the highest level of sensory loss were significantly increased with increased dosage. In the hyperbaric bupivacaine groups of 15 mg and 20 mg respectively, the sensory lose in comparison with isobaric groups was significantly increased. 2) Less time was needed to achieve, complete motor blockade in the 15 mg hyperbaric bupivacaine group than in the isobaric groups but there were no significant differences between the other groups. The duration of motor blockade was more prolonged in the isdobaric bypivacaine groups using 15mg And 20 mg than in the hyperbaric groups. 3) The Group using 20 mg of hyperbaric bupivacaine demonstrated a significant decrease in blood pressure as coupared wish the group using 20 mg of isobaric bupivacaine. 4) Following spinal anesthesia, headache developed in 5 cases (5.6%). From the above results we conluded that isobaric bupivacaine and hyperbaric bupivacaine are appropriate anesthesia agents for surgery on the lower abdomen and lower extremities.