ABSTRACT
OBJECTIVE: To describe a technique for basihyoid-ceratohyoid disarticulation (BCD) in standing sedated horses affected by temporohyoid osteoarthropathy (THO) and report outcomes for horses that underwent the procedure. ANIMALS: 6 client-owned horses. PROCEDURES: Electronic medical records of a veterinary teaching hospital were searched to identify horses that underwent BCD for treatment of THO from 2018 to 2019. Signalment, clinical data, use of the horse, and complications were recorded. Follow-up data obtained by telephone interview with owners included the clinical outcome and time to improvement after surgery, any persistent clinical signs, horse's activity level before onset of clinical signs and after BCD, subsequent use of the horse, and whether they would pursue the same treatment again. RESULTS: All horses tolerated the procedure well, with no complications and improved neurologic function after BCD. Five of 6 horses had a reported activity level equal to or greater than that prior to having signs of THO. Three of 3 horses with acute ataxia prior to BCD reportedly had full resolution of this sign; 3 of 4 horses with facial nerve deficits prior to BCD had mild residual facial nerve deficits at follow-up. All owners indicated they would pursue BCD again. CONCLUSIONS AND CLINICAL RELEVANCE: The BCD procedure was performed safely in this sample of THO-affected horses that were sedated while standing, avoiding risks associated with general anesthesia and resulting in no adverse effects such as iatrogenic injury to neurovascular structures.
Subject(s)
Horse Diseases , Animals , Disarticulation/veterinary , Facial Nerve , Horse Diseases/surgery , Horses , Hospitals, Animal , Hospitals, Teaching , Retrospective StudiesABSTRACT
The effects of head position on internal carotid artery (ICA) and external carotid artery (ECA) pressures in standing sedated horses were evaluated in this study. The common carotid artery (CCA) was catheterized in 6 horses using an ultrasound-guided technique to facilitate placement of a pressure transducer within the ICA and ECA at the level of the guttural pouch. Transducer position was confirmed by endoscopic visualization. Mean arterial pressure (MAP) was measured with horses in both a head-up and head-down position. The dorsal metatarsal artery was catheterized as a control. Maintaining a head-up position decreased MAP in both the ICA (median: 75.21 mmHg) and ECA (median: 79.43 mmHg), relative to the head-down position (ICA median: 104.65 mmHg; ECA median: 102.26 mmHg). Mean arterial pressure in the dorsal metatarsal artery was not affected by head position. The head-up position resulted in lower arterial pressures in both the ICA and ECA (P = 0.03) compared with the head-down position in standing sedated horses.
Cette étude a évalué les effets de la position de la tête sur la pression artérielle au niveau de l'artère carotide interne (ICA) et de l'artère carotide externe (ECA) chez des chevaux sous sedation debout. L'artère carotide commune (CCA) a été cathétérisée chez six chevaux en utilisant une technique échoguidée pour faciliter le placement d'un transducteur de pression dans l'ICA et l'ECA au niveau de la poche gutturale. La position du transducteur a été confirmée par endoscopie. La pression artérielle moyenne (MAP) a été mesurée chez les chevaux avec la tête en position haute et en position basse. L'artère métatarsienne dorsale a été cathétérisée et a servi comme témoin. Les MAP enregistrées au niveau de l'ICA (médiane: 75,21 mmHg) et de l'ECA (médiane: 79,43 mmHg) lorsque la tête est en position élevée sont plus faibles que celles enregistrées lorsque la tête est en position basse (médiane ICA: 104,65 mmHg; médiane ECA: 102,26 mmHg). La MAP de l'artère métatarsienne dorsale n'a pas été affectée par la position de la tête. En conclusion, chez les chevaux sédatés et debout, la position élevée de la tête produit des pressions artérielles plus faibles au niveau de ICA et ECA (P = 0,03) que celles obtenues lorsque la tête est en position basse.(Traduit par les auteurs).
