We applied intermittent positive pressure ventilation (IPPV) under isoflurane-oxygen anesthesia to a 5 year-old thoroughbred horse for implantation of a left atrial transducer. The horse was pre-anesthetized with an intravenous injection of xylazine (0.5 mg/kg) and midazolam (0.01 mg/kg), followed by ketamine (2.5 mg/kg) for anesthetic induction. During surgery, dobutamine was infused at a variable rate of 0.25-3.3μg/kg/min to maintain mean arterial blood pressure at approximately 80 mmHg. The horse was anesthetized over 5 hours, however, recovered uneventfully and with normal postsurgical clinical signs.

View full abstract

A 8-year-old male Akita was examined because of weakness and tachypnea of 2 months' duration. Digital percussion and concurrent auscultation of the cranioventral thoracic area revealed dull, nonresonant sounds. Thoracic radiography revealed a large, soft-tissue density encompassing the entire left cranial cuadrant of the thorax. Based on location, radiographic appearance, and the lymphoid cells found on cytologic examination of the mass, thymoma was considered as a temporary diagnosis.
Thoracotomy was performed through the 4th and 5th intercostal space. A 11 by 17 by 7 cm lobulated mass was excised from the anterior mediastinum. Light microscopic examination of the mass revealed thymic tissue with capsular and vascular invasion by lymphocytes. The findings were consistent with thymoma. No metastasis was noted at the surgery. The surgical recovery was uneventful and clinical weakness improved without medical therapy. At 24 months after the surgery, the dog has not shown recurrence of thymoma without any clinical signs.

View full abstract

The effect of ovariohysterectomy under the halothane anesthesia on canine neutrophil adhesion was investigated. The ovariohysterectomy was performed in 14 clinically healthy female dogs. The canine neutrophil adhesion was assessed before and after the operation. The adhesive index was significantly decreased immediately after the operation (p<0.001) and recovered to the approximately preoperative value at 1 day postoperation. The results suggest that canine neutrophil adhesion is suppressed after ovariohysterectomy under the halothane anesthesia.

View full abstract