Ultrasound-guided block of sciatic and femoral nerves: an anatomical study

Waag, Sonja; Stoffel, Michael Hubert; Spadavecchia, Claudia; Eichenberger, Urs; Rohrbach, Helene (2014). Ultrasound-guided block of sciatic and femoral nerves: an anatomical study. Laboratory animals, 48(2), pp. 97-104. Sage Publications 10.1177/0023677213516314

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The sheep is a popular animal model for human biomechanical research involving invasive surgery on the hind limb. These painful procedures can only be ethically justified with the application of adequate analgesia protocols. Regional anaesthesia as an adjunct to general anaesthesia may markedly improve well-being of these experimental animals during the postoperative period due to a higher analgesic efficacy when compared with systemic drugs, and may therefore reduce stress and consequently the severity of such studies. As a first step 14 sheep cadavers were used to establish a new technique for the peripheral blockade of the sciatic and the femoral nerves under sonographic guidance and to evaluate the success rate by determination of the colorization of both nerves after an injection of 0.5 mL of a 0.1% methylene blue solution. First, both nerves were visualized sonographically. Then, methylene blue solution was injected and subsequently the length of colorization was measured by gross anatomical dissection of the target nerves. Twenty-four sciatic nerves were identified sonographically in 12 out of 13 cadavers. In one animal, the nerve could not be ascertained unequivocally and, consequently, nerve colorization failed. Twenty femoral nerves were located by ultrasound in 10 out of 13 cadavers. In three cadavers, signs of autolysis impeded the scan. This study provides a detailed anatomical description of the localization of the sciatic and the femoral nerves and presents an effective and safe yet simple and rapid technique for performing peripheral nerve blocks with a high success rate.

Item Type:

Journal Article (Original Article)

Division/Institute:

05 Veterinary Medicine > Research Foci > NeuroCenter
05 Veterinary Medicine > Department of Clinical Veterinary Medicine (DKV)
05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH) > Veterinary Anatomy
05 Veterinary Medicine > Department of Clinical Veterinary Medicine (DKV) > DKV - Anaesthesiology

Graduate School:

Graduate School for Cellular and Biomedical Sciences (GCB)

UniBE Contributor:

Stoffel, Michael Hubert; Spadavecchia, Claudia and Rohrbach, Helene

Subjects:

600 Technology > 630 Agriculture
500 Science > 570 Life sciences; biology
600 Technology > 610 Medicine & health

ISSN:

0023-6772

Publisher:

Sage Publications

Funders:

[8] 3R Research Foundation Switzerland

Language:

English

Submitter:

Helene Rohrbach

Date Deposited:

22 Sep 2014 15:33

Last Modified:

10 Oct 2019 10:16

Publisher DOI:

10.1177/0023677213516314

PubMed ID:

24464921

Uncontrolled Keywords:

regional anaesthesia, sheep, ultrasound, anatomy, hind limb surgery

BORIS DOI:

10.7892/boris.46830

URI:

https://boris.unibe.ch/id/eprint/46830

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