Stewart J H, Rose R J, Barko A M
Equine Vet J. 1984 Jul;16(4):323-8. doi: 10.1111/j.2042-3306.1984.tb01936.x.
Respiratory measurements and blood-gas and acid-base values are reported in nine term induced foals. Measurements were performed at 2, 15, 30 and 60 mins, 4, 12, 24 and 48 h, and four and seven days after birth. Minute respiratory volume was significantly lower at birth than values from 12 h old. Tidal volume peaked at 60 mins old, while respiration rate decreased significantly at 15 mins after birth. Oxygen consumption was high at birth and decreased to its lowest values at 24 and 48 h. The respiratory exchange ratio and ventilatory equivalent showed few significant changes to seven days, as did the minute alveolar ventilation and physiological deadspace. The blood-gas and acid-base values indicated that the foals rapidly establish adequate pulmonary ventilation within minutes of birth, and that those values changed little from 12 h to seven days after birth. Body position had a significant effect on arterial oxygen tension with Pao2 values in lateral recumbency being, on average, 14 mmHg lower than when the foals were standing.
报告了9匹足月引产驹的呼吸测量值以及血气和酸碱值。在出生后2分钟、15分钟、30分钟和60分钟、4小时、12小时、24小时和48小时以及出生后4天和7天进行测量。出生时的分钟通气量显著低于出生12小时后的数值。潮气量在出生60分钟时达到峰值，而呼吸频率在出生后15分钟时显著下降。出生时耗氧量较高，并在出生后24小时和48小时降至最低值。呼吸交换率和通气当量在出生后7天内几乎没有显著变化，分钟肺泡通气量和生理死腔也是如此。血气和酸碱值表明，驹在出生后几分钟内迅速建立了足够的肺通气，并且从出生后12小时到7天这些数值变化很小。体位对动脉血氧分压有显著影响，侧卧时的动脉血氧分压（Pao2）值平均比驹站立时低14 mmHg。
