Effect of intratesticular injection of lidocaine on cardiovascular responses to castration in isoflurane-anesthetized stallions

American Journal of Veterinary Research
H A HagaB Ranheim

Abstract

To evaluate the effect of intratesticular administration of lidocaine on cardiovascular responses and cremaster muscle tension during castration of isoflurane-anesthetized stallions. 28 healthy stallions (mean +/- SD age, 4.2 +/- 2.8 years) with no testicular abnormalities that were scheduled for castration. Each horse was given acepromazine (20 microg/kg, IM), romifidine (50 microg/kg, IV), and butorphanol (20 microg/kg, IV). Anesthesia was induced with ketamine (2.5 mg/kg, IV) and midazolam (50 microg/kg, IV) and maintained with isoflurane (1.7% end-tidal concentration). After 10 minutes at a stable anesthetic plane, a needle was placed in each testicle and either no fluid or 15 mL of 2% lidocaine was injected; 10 minutes after needle placement, surgery was commenced. Pulse rate and arterial blood pressures were measured invasively at intervals from 5 minutes prior to castration (baseline) until 5 minutes after the left spermatic cord was clamped. The surgeon subjectively scored the degree of cremaster muscle tension. In 2 horses, lidocaine labeled with radioactive carbon (C(14)) was used and testicular autoradiograms were obtained. Compared with baseline values, castration significantly increased blood pressure measurements;...Continue Reading

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Citations

Dec 12, 2012·Animal : an International Journal of Animal Bioscience·R GuatteoP Le Neindre
Apr 17, 2009·Journal of Zoo and Wildlife Medicine : Official Publication of the American Association of Zoo Veterinarians·Michelle A MorgesMatthew S Johnston
Jan 13, 2010·Journal of Zoo and Wildlife Medicine : Official Publication of the American Association of Zoo Veterinarians·Rose BorkowskiBrenda Irvine
Feb 14, 2013·Journal of the American Veterinary Medical Association·Tania E PerezRaelynn Farnsworth
Jun 6, 2013·The Veterinary Record·E J LoveJ Murrell
Feb 26, 2009·Veterinary Anaesthesia and Analgesia·Karine G PortierCatherine M Walsh
Jul 4, 2012·The Journal of Small Animal Practice·M W McMillanJ C Brearley
Sep 22, 2012·Veterinary Anaesthesia and Analgesia·Vilhelmiina HuuskonenEleanor West
Jun 26, 2020·Frontiers in Veterinary Science·Tate B MorrisSamuel D A Hurcombe
Aug 8, 2018·American Journal of Veterinary Research·Hamzeh Soltaninejad, Nasser Vesal
Feb 25, 2020·Equine Veterinary Journal·Alycia CrandallDavid Levine
Aug 28, 2021·Animals : an Open Access Journal From MDPI·Paola StraticòLucio Petrizzi

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