Schmotzer W B, Riebold T W, Rowe K E, Scott E A
Veterinary Teaching Hospital, College of Veterinary Medicine, Oregon State University, Corvallis 97331.
Am J Vet Res. 1991 Apr;52(4):619-25.
The steady-state response characteristics of a pulse oximeter were evaluated on intestinal segments of seven clinically normal halothane-anesthetized horses. Arterial oxygen tension greater than 200 mm of Hg, end tidal carbon dioxide from 30 to 35 mm of Hg, and systemic mean arterial pressure greater than 70 mm of Hg were maintained throughout the recording periods. Values for percentage of pulse oximeter oxygen saturation, pulsatile blood flow, and percentage of signal strength were recorded from jejunum, ileum, cecum, left ventral colon, left dorsal colon, and descending colon. Probe placement on intestinal segments was recorded as over or not over visible subserosal or transmural vessels. There was no significant difference between median values on the basis of vessel codes for pulse oximeter oxygen saturations, pulsatile flow, and signal strength. Median values recorded for pulse oximeter oxygen saturation were 93% from jejunum and ileum and 95% from cecum, left ventral colon, left dorsal colon, and descending colon; median values for pulsatile flow were 576 from jejunum, 560 from ileum, 560 from cecum, 574 from left ventral colon, 578 from left dorsal colon, and 560 from descending colon; median values for signal strength were 50% from jejunum, 67.5% from ileum, 60% from cecum, 75% from left ventral colon, 50% from left dorsal colon, and 52.5% from descending colon. Median values obtained from each anatomic location were not significantly different for pulsatile flow or signal strength. Median pulse oximetry oxygen values recorded from jejunum and ileum were significantly lower than values obtained from other intestinal segments.(ABSTRACT TRUNCATED AT 250 WORDS)
在7匹经氟烷麻醉的临床正常马匹的肠段上评估了脉搏血氧饱和度仪的稳态反应特性。在整个记录期间，维持动脉血氧分压大于200 mmHg、呼气末二氧化碳分压在30至35 mmHg之间以及体循环平均动脉压大于70 mmHg。记录了空肠、回肠、盲肠、左腹结肠、左背结肠和降结肠的脉搏血氧饱和度仪血氧饱和度百分比、搏动性血流和信号强度百分比值。记录了探头在肠段上的放置位置是在可见的浆膜下或透壁血管上方还是未在其上方。基于血管编码的脉搏血氧饱和度仪血氧饱和度、搏动性血流和信号强度的中位数之间没有显著差异。记录的脉搏血氧饱和度仪血氧饱和度中位数在空肠和回肠为93%，在盲肠、左腹结肠、左背结肠和降结肠为95%；搏动性血流的中位数在空肠为576，在回肠为560，在盲肠为560，在左腹结肠为574，在左背结肠为578，在降结肠为560；信号强度的中位数在空肠为50%，在回肠为67.5%，在盲肠为60%，在左腹结肠为75%，在左背结肠为50%，在降结肠为52.5%。从每个解剖位置获得的搏动性血流或信号强度的中位数没有显著差异。从空肠和回肠记录的脉搏血氧饱和度仪血氧中位数显著低于从其他肠段获得的值。（摘要截断于250字）
