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Do we necessarily need local anaesthetics for venous cannulation? A comparison of different cannula sizes

  • K. D. Röhm (a1), T. A. H. Schöllhorn (a1), M. J. Gwosdek (a1), S. N. Piper (a1), W. H. Maleck (a2) and J. Boldt (a1)...

Abstract

Summary

Background and objective: This randomized, prospective study was performed to evaluate the efficacy of a subcutaneous local anaesthetic infiltration prior to venepuncture using different cannula sizes.

Methods: Three-hundred-and-one patients were included in the study, 150 received mepivacaine 1% (0.25 mL) subcutaneously, 151 were cannulated without local analgesia. Patients were further allocated to one of five cannula size groups (standard wire gauge (G)): 20-, 18-, 17-, 16- and 14-G. They were asked to quantify the pain experienced using a four-point rating scale.

Results: In the group without local anaesthetics, 28.8% complained about pain compared to 12% receiving local analgesia. The incidence of pain for 14-G (10%) and 16-G (12.9%) cannulae was significantly reduced in the local analgesia group (P < 0.01) compared to no local analgesia (77.4% and 45.1%). Other cannula sizes showed no difference in pain whether using local analgesia or not.

Conclusions: Patients profit from a subcutaneous infiltration with mepivacaine 1% prior to intravenous cathetherization only when cannulae of size ≥16-G are inserted.

Copyright

Corresponding author

Correspondence to: Kerstin Röhm, Department of Anesthesiology and Intensive Care Medicine, Klinikum Ludwigshafen, Bremserstraße 79, D-67063 Ludwigshafen, Germany. E-mail: k.d.roehm@t-online.de; Tel: +49 621 503 3000; Fax: +49 621 503 3024

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Keywords

Do we necessarily need local anaesthetics for venous cannulation? A comparison of different cannula sizes

  • K. D. Röhm (a1), T. A. H. Schöllhorn (a1), M. J. Gwosdek (a1), S. N. Piper (a1), W. H. Maleck (a2) and J. Boldt (a1)...

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