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    Ultrasound-guided proximal paravertebral anaesthesia in cattle (2014)

    Art
    Zeitschriftenartikel / wissenschaftlicher Beitrag
    Autoren
    Kramer, Anne H
    Doherr, Marcus G (WE 16)
    Stoffel, Michael H
    Steiner, Adrian
    Spadavecchia, Claudia
    Quelle
    Veterinary Anaesthesia and Analgesia; 41(5) — S. 534–542
    ISSN: 1467-2987
    Sprache
    Englisch
    Verweise
    DOI: 10.1111/vaa.12148
    Pubmed: 24575819
    Kontakt
    Institut für Veterinär-Epidemiologie und Biometrie

    Königsweg 67
    Gebäude 21, 1. OG
    14163 Berlin
    +49 30 838 56034

    Abstract / Zusammenfassung

    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.

    prospective experimental cadaveric study and clinical series.

    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.

    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.

    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.

    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.

    Further research should be conducted to improve the ultrasound-guided technique described in this study.