Analgesia postoperatoria con bloqueo de plexo braquial con: L-bupivacaina al 0,25% VS bupivacaina al 0,25% en pacientes mayores de 18 años, Hospital Vicente Corral Moscoso, 2009-2010

Abstract

Objective. Compare produced by L-bupivacaine sensitive block time and frequency motor lock compared with bupivacaine, to the same concentration and dose administered to patients in whom was blocking brachial plexus for upper limb surgery.

Materials and methods. With an experimental design included 90 patients of both sexes, age 18, divided into two equal groups to receive either 30-40 ml of L-bupivacaine 0.25% (n = 45) or 30-40 ml of 0.25% bupivacaine (n = 45). Measured time sensitive lock postoperative, frequency motor lock, hemodynamic behavior and secondary reactions to drugs.

Results. Groups were comparable in demographic characteristics and the control variables. There was also significant differences in hemodynamic behavior of groups but was detected transient tachycardia in 8.9% (n = 4) of the group that received bupivacaine (P = 0,041).

The average time sensitive lock was 637,3 ± 72.6 min (range 540-840) for the group to receive L-bupivacaine and 314.8 ± 51,1 min (range 180-420) for the group that received bupivacaine (P < 0.01).

There was no engine block in the group receiving L-bupivacaine but yes in 80% (n = 36) of the group that received bupivacaine (P < 0.01).

Conclusions. L-bupivacaína is as effective as bupivacaine for brachial plexus block when required surgery of the upper limb in patients 18 years of age or older. L-bupivacaine relevant feature is its long time sensitive lock and the lower frequency motor lock as bupivacaine.

Key words: L-bupivacaine, bupivacaine, brachial plexus, sensitive block, motor block.