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Ann Emerg Med. 1993 Feb;22(2):216-9.

Buffered versus plain lidocaine for digital nerve blocks.

Author information

1
Department of Emergency Medicine, Albany Medical College, New York.

Abstract

STUDY OBJECTIVES:

To test whether buffered lidocaine is less painful to administer as a digital nerve block than plain lidocaine.

DESIGN:

Randomized, double-blind, prospective clinical trial.

SETTING:

University hospital emergency department.

PARTICIPANTS:

Adults not allergic to lidocaine requiring a digital nerve block.

INTERVENTIONS:

Subjects received digital nerve blocks by injection of buffered lidocaine on one side and plain lidocaine on the other in a predetermined, randomized order. Pain of infiltration was assessed. Scores were compared using a two-tailed t-test. Standard 1% lidocaine was used if additional anesthetic was required.

MEASUREMENTS AND MAIN RESULTS:

Thirty-one patients were enrolled. Buffered lidocaine was significantly less painful to administer than plain lidocaine (P < .001; t = 4.21). Supplemental anesthesia was required less often for buffered lidocaine (two times) compared with plain lidocaine (six times), although this difference was not statistically significant.

CONCLUSION:

Because it causes less pain and is equally efficacious, buffered lidocaine is preferable to plain lidocaine for digital nerve blocks in adults.

PMID:
8381259
[Indexed for MEDLINE]

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