Matthew D Barnhart

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Thoracolumbar intervertebral disc disease is the most common cause of caudal paresis in dogs. Whilst the pathogenesis of the extrusion has been widely studied, treatment protocols and prognostic factors relating to outcome remain controversial. Recent studies have examined a multitude of factors relating to time to regain ambulation after decompressive(More)
OBJECTIVE To investigate radiographic changes of the tibial tuberosity after tibial plateau leveling osteotomy (TPLO) surgery and identify clinical findings and risk factors associated with such changes. STUDY DESIGN Retrospective study. SAMPLE POPULATION Hundred and eighty-six client-owned dogs (219 stifles) that had TPLO surgery. METHODS Patient(More)
The records of 25 dogs with bilaterally ruptured cranial cruciate ligaments (CrCL) treated with single-session bilateral tibial plateau leveling osteotomies (TPLOs) were reviewed. The mean age and body weight at presentation were 4.9 years and 36.1 kg, respectively. Minor complications occurred in five dogs. Good or excellent function occurred in 19 of 25(More)
INTRODUCTION In planning for the introduction of vaginal microbicides and other new antiretroviral (ARV)-based prevention products for women, an in-depth understanding of potential end-users will be critically important to inform strategies to optimize uptake and long-term adherence. User-centred private sector companies have contributed to the successful(More)
The Northwest Fisheries Science Center of the National Marine Fisheries Service, NOAA, uses the NOAA Technical Memorandum NMFS-NWFSC series to issue scientific and technical publications. Manuscripts have been peer reviewed and edited. Documents published in this series may be cited in the scientific and technical literature.
Sixty-one adrenal gland tumors were surgically removed from 60 dogs. Fifty-two dogs underwent elective adrenalectomy and 8 dogs underwent emergency adrenalectomy for acute adrenal hemorrhage. Size of adrenal tumors ranged from 10 mm to 80 mm. Histopathology confirmed a diagnosis of adrenocortical tumor in 47 dogs, 26 of which were malignant.(More)
Incomplete urethral duplication with cyst formation was diagnosed in a dog that had soft, fluctuant, subcutaneous swellings in the ventral perineal and penile areas and a history of nocturia and incontinence during recumbency that were unresponsive to treatment with antibiotics. Retrograde urethrocystography, voiding urethrography, double-contrast(More)
OBJECTIVE To determine the presence and duration of analgesia after oxymorphone, acepromazine maleate, acepromazine-oxymorphone combination and medetomidine administration in dogs. STUDY DESIGN Blinded, controlled study. ANIMALS Six adult beagle dogs. METHODS Each dog participated in five trials receiving acepromazine maleate (0.2 mg kg-1 IM),(More)
OBJECTIVE To compare systemic bioavailability and duration for therapeutic plasma concentrations and cardiovascular, respiratory, and analgesic effects of morphine administered per rectum, compared with IV and IM administration in dogs. ANIMALS 6 healthy Beagles. PROCEDURE In a randomized study, each dog received the following: morphine IV (0.5 mg/kg of(More)
This study investigated the pharmacokinetics of a human-labeled oral morphine formulation consisting of both immediate and extended release components in dogs. In a randomized design, 14 dogs were administered either 1 or 2 mg/kg morphine orally. Blood samples were collected up to 24 h post drug administration. Plasma concentrations of morphine were(More)