Renal blood flow and jet phenomenon of auto-or allografts was measured by color Doppler technique to evaluate the renal function during stable phase after transplation in dogs. Quantitative measurements of renal and intrarenal blood flow were possible, which enabled to evaluate the renal function of the grafts. Jet phenomenon (urine flow from the ureteral orifice into the bladder) was also clearly visualized, which was useful to evaluate the stenosis after ureterocystostomy. Thus this technique is quite useful to evaluate the postsurgical complications of the kidney transplantation non-invasively.

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To evaluate the clinical usefulness of end-tidal carbon dioxide (EtCO₂) monitoring, 69 dogs receiving various surgeries or endoscopy were anesthetized with nitrous oxide-oxygen-isoflurane (GOT, n=35) or-sevoflurane (GOS, n=34) under spontaneous ventilation, among which about a half of cases (18 in GOI, 16 in GOS) were subjected to EtCO₂ monitoring. In these cases, the inhaled concentration of anesthetic agents was adjusted to give adequate surgical anesthesia and to maintain the EtCO₂ below 40 mmHg. Anesthetic concentration of the remaining dogs were adjusted without EtCO₂ monitoring according to the anesthetic level of the patient. The anesthetic condition was adequate in the dogs subjected to EtCO₂ monitoring. Respiratory acidosis and a fall in body temperature and peripheral arterial blood pressure were comparatively severe in the dogs without EtCO₂ monitoring, particularly those anesthetized for more than 2 hr. Therefore, EtCO₂ monitoring is useful for safer anesthesia in dogs.

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In two bitches with dysuria caused from urethritis and viginal fibroleiomyoma, palpation per rectum or vagina was effective to diagnose and to decide the surgical approach. Surgeries for these two cases were successful.

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A 3-year-old male Japanese domestic cat was presented because of continuous coughing for one month. Thoracic radiographs demonstrated tracheal stenosis proximal to the carina, fracture of the dorsal spinous process at the 4th thoracic vertebra and subcutaneous emphysema. Treatment with antibiotics and anti-inflammatory drugs was initiated, but unsuccessful. Surgical impairment was carried out on the 14th day after the first admission, when the patient showed severe intermittent dyspnea. A right lateral thoracotomy was made at the 4th intercostal space. The trachea with stenosis was isolated and removed. Simple interrupted sutures (4-0 nylon) penetrating the cartilage were performed. After the operation, respiratory disturbance was gradually improved and disappeared in 2 months.

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