Intracellular pH in unanesthetized dogs during panting

Albers, C.; Usinger, W.; Scholand, Ch.

doi:10.1016/0034-5687(75)90072-9

Cited by 18 publications

(7 citation statements)

References 22 publications

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“…This finding is in agreement with earlier findings by Crawford (1962) who showed that dogs exposed to moderate heat stress were panting at 5.33 Hz which is close to the natural frequency of the respiratory system (5.28 Hz). By contrast, Albers et al (1975) and Maskrey and Jennings (1985) showed that the respiratory response to acute heat stress was highly variable with a mean frequency of about 3 Hz, but some dogs did not pant at all. In the present study, the dogs apparently took advantage of the natural rebound of the respiratory system to minimize the extra energy expenditure about 6 ml kg-' min-', during panting is quite low and is comparable to that in anesthetized breathing dogs breathing spontaneously at normal room temperature (cf.…”

Section: Resplratory Patlernmentioning

confidence: 82%

Panting in Dogs as a Model for High-Frequency Ventilation

Meyer

Hahn

Piiper

1988

Engineering in Medicine

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Section: Resplratory Patlernmentioning

confidence: 82%

Panting in Dogs as a Model for High-Frequency Ventilation

Meyer

Hahn

Piiper

1988

Engineering in Medicine

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“…min-' (Jennings & Macklin, 1972). Dogs breathing 4 % C02 at a T. of 40 TC showed a 25 % reduction in frequency compared to when breathing air (Albers et al 1975). In sheep exposed to a range of inhaled C02 ofup to 16 %, frequency increased from an initial f value of 30 (Hoover et al 1970), while in panting sheep the f value was decreased when C02 was inhaled (Fawcett, 1971).…”

Section: Methodsmentioning

confidence: 99%

“…Under certain circumstances, it is possible to obtain a fall in frequency when C02 is inhaled, (Jennings & Macklin, 1972;. Albers, Usinger & Scholand, 1975;Maskrey & Nicol, 1976, 1979.…”

Section: Introductionmentioning

confidence: 99%

The respiratory frequency response to carbon dioxide inhalation in conscious rabbits

Maskrey

Nicol

1980

The Journal of Physiology

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SUMMARY1. The respiratory responses to C02 inhalation were measured in New Zealand White rabbits. Prior to testing, the rabbits either received drinking water ad libitum (C), or were subjected to 72 hr water deprivation (WD). The rabbits were tested in a climatic chamber at either 20 0, (C20, WD20) or 30 0C (C30, WD30).2. C02 exposure caused increases in both tidal volume (VT) and minute volume (VE). The direction and magnitude of changes in respiratory frequency (f), however, were dependent upon treatment.3. Linear regressions were drawn for f vs. % C02 in inhaled gas. Treatment C20 showed zero slope, treatment C30 a large negative slope, and treatments WD20 and WD30 a significant positive slope.4. The slopes ofthe regression lines obtained from plottingf vs. % C02 were plotted against their intercepts for each rabbit under each treatment condition. This yielded a highly significant linear regression from which it could be concluded that the frequency response to C02 exposure is dependent upon the initial frequency when the rabbits are breathing air.5. It is suggested that frequency is shifted during hypercapnia towards an optimal value which is dependent upon the existing % C02 in the inspired gas.6. Comparison of the results obtained for the rabbit with results reported for the conscious dog and sheep suggest that a similar relationship may hold for these species.

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“…Dogs (Albers et al, 1975), cats (Morgan and Adams, 1972), and wildebeest experience little or no alkalosis during moderate heat stress, and oxen (Hales and Findlay, 1968), sheep (Hales and Webster, 1967), and Tammar Wallaby (Dawson and Rose, 1970) experience only modest alkalosis. However, the goat and dikdik (Maskrey et al, 1978;Maskrey, 1984) tolerate considerable alkalosis while panting.…”

Section: Heatmentioning

confidence: 98%

“…However, the goat and dikdik (Maskrey et al, 1978;Maskrey, 1984) tolerate considerable alkalosis while panting. With severe heat stress, however, all these species experience levels of hypocapnia and alkalosis beyond those tolerated by humans (e.g., Pa CO2 as low as 10 and a pH of 7.76 in the dog; Albers et al, 1975).…”

Section: Heatmentioning

confidence: 99%