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Comparative Study
. 2000 Oct 1;25(19):2526-30.
doi: 10.1097/00007632-200010010-00016.

The effect of neuromuscular blockade on pedicle screw stimulation thresholds

R E Minahan  1 , L H Riley 3rd, T Lukaczyk, D B Cohen, J P Kostuik
Affiliations
Comparative Study

The effect of neuromuscular blockade on pedicle screw stimulation thresholds

R E Minahan et al. Spine (Phila Pa 1976). .

Abstract

Study design: Nerve root stimulation thresholds were studied relative to the level of neuromuscular blockade in patients undergoing lumbar decompression surgery.

Objectives: To determine what levels of intraoperative neuromuscular blockade can be used during pedicle screw stimulation.

Background data: Previous studies of intraoperative pedicle screw stimulation thresholds have failed to determine the effect of neuromuscular blockade on the stimulation threshold.

Methods: Twenty-one roots in 10 patients undergoing lumbar decompression surgery were studied at different levels of neuromuscular blockade. Ninety-five nerve root thresholds were determined relative to level of blockade.

Results: Neuromuscular blockade below 80% provides nerve root thresholds similar to thresholds without blockade.

Conclusions: Neuromuscular blockade should be less than 80% when using pedicle screw electrical stimulation testing.

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