Thermistor use to monitor urine flow rates in dogs.

The small size of a new thermistor flowmeter facilitated implantation in ureters in anesthetized dogs. It consisted of a self-heating thermistor bead which was suspended centrally within an open catheter and dissipated heat as a function of fluid velocity. A continuous record of instantaneous flow rate was obtained, since the flowmeter catheter maintained a constant cross-sectional area around the thermistor bead. A continuous record of volume output was obtained simultaneously with an additional measurement technique. Spurt volumes of urine delivered in concert with ureter peristalsis were directly correlated to peak flow rates delineated by the flowmeter.

Anatomy and cannulation of the parotid duct in the dog.

The course of the dog's parotid duct is more complex than previously reported. The newly described features are that the duct has 2 right-angle curves in its terminal part and that it perforates the fascia and mucosa of the cheek between the orbicularis oris and buccinator muscles. The duct does not perforate the buccinator muscle. Based on these findings, a rapid and reliable technique for intubation of the duct was developed.

Leptospiral agglutinins in dogs in Sydney.

From June 1971 to June 1972, sera from 600 dogs in Sydney were tested for leptospiral agglutinins by a rapid slide agglutination method. The end-point titre was taken at 50 percent agglutination of the live organisms. Forty-one samples (6.8 percent) had a significant leptospiral titres (100 or greater) and 5 of these reacted to 2 serotypes. Thirty serums (5 percent) contained agglutinins against L. copenhageni, and 6 (1 percent) against L. pomona, while a few samples reacted against hardjo, tarassovi, australis, grippotyphosa or pyrogenes serotypes. No significant titres were found to L. canicola, L. hebdomadis, L. autumnalis or L. bataviae.