Ultrasound-guided proximal paravertebral anaesthesia in cattle

Kramer, Anne Hester; Doherr, Marcus; Steiner, Adrian; Stoffel, Michael Hubert; Spadavecchia, Claudia (2014). Ultrasound-guided proximal paravertebral anaesthesia in cattle. Veterinary anaesthesia and analgesia, 41(5), pp. 534-542. Blackwell Science 10.1111/vaa.12148

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OBJECTIVE To develop and evaluate a method for ultrasound-guidance in performing the proximal paravertebral block for flank anaesthesia in cattle through a cadaveric study, followed by clinical application. STUDY DESIGN prospective experimental cadaveric study and clinical series. ANIMALS Previously frozen lumbar sections of cows without known spinal abnormalities were used. The clinical case group comprised of ten animals for which a right flank laparotomy was indicated. METHODS Twenty cow cadavers were used to perform ultrasound-guided bilateral injections of 1.0 mL dye (1.0 mL 1% Toluidine Blue in 1% Borax) at the intervertebral foramen at the level of T13, L1 and L2 spinal nerves. Distance and depth of injection, staining of the dorsal and ventral nerve branches, and deviation from the target were evaluated. The investigator's confidence as to visualisation and expected success at staining the nerve was assessed. Ten clinical cases received the ultrasound-guided proximal paravertebral anaesthesia. Analgesic success was evaluated using a 4-grade scoring system at 10 minutes after the injection and during surgery, respectively. Categorical variables were described using frequencies and proportions. RESULTS Both dorsal and ventral branches of the spinal nerves T13, L1 or L2 were at least partially stained in 41% of injections, while in 77% of injections one of the branches was stained. Five out of ten clinical cases had a satisfactory anaesthesia. There was no significant association between confidence at injection and either staining or analgesic success. CONCLUSION Results from the cadaveric and clinical study suggest no significant improvement using ultrasound guidance to perform proximal paravertebral block in cows compared to our previous clinical experience and to references in the literature using the blind method. CLINICAL RELEVANCE Further research should be conducted to improve the ultrasound-guided technique described in this study.

Item Type:

Journal Article (Original Article)

Division/Institute:

05 Veterinary Medicine > Research Foci > NeuroCenter
05 Veterinary Medicine > Research Foci > Veterinary Public Health / Herd Health Management
05 Veterinary Medicine > Department of Clinical Veterinary Medicine (DKV)
05 Veterinary Medicine > Department of Clinical Veterinary Medicine (DKV) > Clinic for Ruminants
05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH) > Veterinary Public Health Institute
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

UniBE Contributor:

Kramer, Anne Hester; Doherr, Marcus; Steiner, Adrian; Stoffel, Michael Hubert and Spadavecchia, Claudia

Subjects:

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

ISSN:

1467-2987

Publisher:

Blackwell Science

Language:

English

Submitter:

Michael Hubert Stoffel

Date Deposited:

16 Oct 2014 15:58

Last Modified:

09 Nov 2018 07:33

Publisher DOI:

10.1111/vaa.12148

PubMed ID:

24575819

Uncontrolled Keywords:

cattle, proximal paravertebral anaesthesia, ultrasound

BORIS DOI:

10.7892/boris.58948

URI:

https://boris.unibe.ch/id/eprint/58948

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