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Biomedical subjects

C D Auld

Publications and source records attributed to C D Auld.

23 records · Page 2Linked to original sources
PubMed1980

Cooling responses in shivering and non-shivering dogs during induced hypothermia.

1. Hypothermia to a temperature of 30 degrees C was induced in both shivering and non-shivering groups of dogs. 2. There was a sustained increase in oxygen consumption in the dogs allowed to shiver and this was up to 300% greater than the oxygen consumption in the relaxed dogs. 3. The increased tissue requirement for oxygen was met both by increased cardiac output and increased oxygen extraction from haemoglobin. 4. Oxygen utilization remained adequate in hypothermia, as shown by the absence of hypoxic acidosis. 5. Heart rate fell during cooling and stroke volume increased to meet the increased oxygen demands associated with shivering during the induction of hypothermia.

Animals↗
PubMed1979

Accidental hypothermia and rewarming in dogs.

1. Twenty lightly anaesthetized dogs were cooled to 29 degrees C by cold-water immersion. Ventilation was spontaneous and the animals were allowed to shiver freely. Metabolic heat production and respiratory heat exchange were measured during rewarming. 2. The animals were divided into four groups each of five dogs and each group was rewarmed by a different technique. The control group was allowed to rewarm spontaneously; a second group was given warm (45-50 degrees C) fully humidified air to breathe in addition; a third group was rewarmed in a hot-water bath (42-44 degrees C) and the remaining group was given in muscle relaxant to abolish shivering and rewarmed by warm inspired air only. 3. The group rewarmed in hot water achieved normal core temperature most rapidly but there was no difference in the rewarming rates of the group rewarmed spontaneously and of the group given warm air to breathe in addition. 4. The group given a muscle relaxant and rewarmed with warm inspired air required 12 h to achieve the same core temperature as the shivering groups achieved in 2 h. Compared with the heat produced by shivering the amount of heat which it was possible to transfer across the respiratory tract was so small that it did not materially influence the rate of rewarming.

Animals↗
PubMedDate not supplied

Congenital absence of the gallbladder: ways of avoiding laparotomy.

Two cases of congenital absence (agenesis) of the gallbladder seen at one hospital over a 5-year period are presented. One patient presented with ascending cholangitis due to choledocholithiasis, while the other presented with right upper quadrant abdominal pain and equivocal findings on ultrasound and oral cholecystography. Although diagnosis was made at laparotomy in both cases, it is likely that the arrival of laparoscopic cholecystectomy will avoid laparotomy in the future. The place of laparoscopy in establishing the presence of this anomaly is discussed.

Adult↗