Cardiovascular and Gas Exchange Effects of Individualized Positive End-Expiratory Pressures in Cats Anesthetized With Isoflurane.

Objectives: To compare the effects of four levels of end-expiratory pressure [zero (ZEEP) and three levels of positive end-expiratory pressure (PEEP)] on the cardiovascular system and gas exchange of cats anesthetized with isoflurane and mechanically ventilated for 3 h with a tidal volume of 10 ml/kg.

Study Design: Prospective, randomized, controlled trial.

Animals: Six healthy male neutered purpose-bred cats.

Continuous measurement of arterial oxygenation in mechanically ventilated horses.

Background: The possibility of accurately and continuously measuring arterial oxygen partial pressure (PaO ) in horses may facilitate the management of hypoxaemia during general anaesthesia.

Objectives: The aim of this study was to evaluate the ability of a novel fibreoptic sensor to measure PaO (PaO ) continuously and in real time in horses undergoing ventilatory manoeuvres during general anaesthesia.

Study Design: In vivo experimental study.

Comparative Efficacy of Histrelin Acetate and hCG for Inducing Ovulation in Brazilian Northeastern Jennies (Equus africanus asinus).

The goal of this study was to compare the efficiency of histrelin acetate (GnRH analog) and human chorionic gonadotropin (hCG) to hasten ovulation in Brazilian Northeastern jennies (Equus africanus asinus). Thirty cycles of ten jennies were randomly assigned in one of the three groups: G0 (control group), saline; G1, 250 μg of histrelin acetate; G2, 2500 IU of hCG. Jennies were evaluated by transrectal palpation and ultrasonography, and had the administration of an ovulation-inducing agent when a follicle measuring between 29 and 32 mm of diameter was diagnosed.

Hemodynamic effects of target-controlled infusion of propofol alone or in combination with a constant-rate infusion of remifentanil in dogs.

The objective of this study was to evaluate the hemodynamic effects of target-controlled infusion (TCI) of propofol alone or in combination with a constant-rate infusion (CRI) of remifentanil. Six adult dogs were given 2 treatments in a randomized crossover study with a 7-day interval between treatments. Treatment 1 was propofol (P) and treatment 2 was propofol and remifentanil (P-Rem), without any premedication.

A clinical comparison of remifentanil or alfentanil in propofol-anesthetized cats undergoing ovariohysterectomy.

Sixteen cats were used to compare the cardiovascular and anesthetic effects of remifentanil (REMI) or alfentanil (ALF) in propofol-anesthetized cats undergoing ovariohysterectomy. After premedication with acepromazine, anesthesia was induced and maintained with a constant rate infusion of propofol (0.3 mg/kg/min).

Use of an osteoconductive compound as an aid in the management of a maxillary fracture in a boa constrictor.

A boa constrictor was presented with a short oblique compound fracture of the rostral third of the right maxilla. The fracture was reduced and biomaterial was placed around the fracture. A computed tomography scan at 1.

Determination of the sevoflurane sparing effect of methadone in cats.

Objective: To determine the magnitude and duration of sevoflurane minimum alveolar concentration (MAC) reduction following a single intravenous (IV) dose of methadone in cats.

Study Design: Prospective experimental study.

Animals: Eight (four females and four males) healthy mixed-breed adult (1-2 years) cats weighing 5.

Plasma concentrations and behavioral, antinociceptive, and physiologic effects of methadone after intravenous and oral transmucosal administration in cats.

Objective: To determine plasma concentrations and behavioral, antinociceptive, and physiologic effects of methadone administered via IV and oral transmucosal (OTM) routes in cats.

Animals: 8 healthy adult cats.

Procedures: Methadone was administered via IV (0.

Effects of methadone on the minimum alveolar concentration of isoflurane in dogs.

Objective: To investigate the effects of methadone on the minimum alveolar concentration of isoflurane (ISO(MAC)) in dogs.

Study Design: Prospective, randomized cross-over experimental study.

Animals: Six adult mongrel dogs, four males and two females, weighing 22.

Effect of remifentanil hydrochloride administered via constant rate infusion on the minimum alveolar concentration of isoflurane in cats.

Objective: To evaluate the effects of increasing doses of remifentanil hydrochloride administered via constant rate infusion (CRI) on the minimum alveolar concentration (MAC) of isoflurane in cats.

Animals: 6 healthy adult cats.

Procedures: For each cat, 2 experiments were performed (2-week interval).

Two surgical approaches to fracture malunion repair.

Two birds were presented with malunion fractures. The first was a young toco toucan (Ramphastos toco) with malunion of the tarsometatarsus that was treated by an opening-wedge corrective osteotomy and an acrylic-pin external skeletal fixator (type II) to stabilize the osteotomy. The second bird was an adult southern caracara (Caracara plancus) with radial and ulnar malunion that was treated by closing-wedge osteotomies.

Use of bispectral index to monitor depth of anesthesia in isoflurane-anesthetized dogs.

Objective: To evaluate the correlation between the bispectral index (BIS) and end-tidal isoflurane (ET(ISO)) concentration and compare the use of 3 BIS sensor positions in dogs.

Animals: 6 adult dogs.

Procedures: Mechanically ventilated dogs received pancuronium, and depth of anesthesia was altered by increasing ET(ISO) concentration from 1.