Cowling Nicholas, Woldeyohannes Solomon, Sole Guitart Albert, Goodwin Wendy
Gatton Campus, School of Veterinary Science, The University of Queensland, Gatton 4343, Australia.
Vet Sci. 2021 Sep 22;8(10):202. doi: 10.3390/vetsci8100202.
Near infrared spectroscopy (NIRS) noninvasively measures peripheral tissue oxygen saturation (StO) and may be useful to detect early changes in StO in anaesthetized and critically ill horses. This study aimed to identify the muscle belly that provided the highest percentage of successful StO readings and the highest mean StO value. Fifty adult horses were enrolled in a prospective controlled study. StO was measured at six different muscles in each horse, for each intervention: hair overlying the muscle was clipped (post clipping: PC), clipped skin was cleaned with chlorhexidine (post-surgical prepping: PP) and medetomidine was administered intravenously (post medetomidine: PM). Mean StO values were calculated for each muscle, and a linear effects model was used to assess the effect of muscle group and intervention on StO. The sartorius muscle gave the highest percentage of successful StO values ( < 0.001) and the highest mean (90% CI) StO values for the PC, PP and PM interventions. Surgical prepping of the skin increased the success for measurement of StO values. For all muscles, administration of medetomidine was associated with lower StO values ( < 0.001). In conclusion, of the muscles examined, the sartorius muscle may be the preferred muscle to measure StO in horses, and clipping and cleaning of the probe placement site is recommended.
近红外光谱法（NIRS）可无创测量外周组织氧饱和度（StO），可能有助于检测麻醉和危重病马StO的早期变化。本研究旨在确定能提供最高成功StO读数百分比和最高平均StO值的肌腹。五十匹成年马被纳入一项前瞻性对照研究。对每匹马的六种不同肌肉进行StO测量，每种干预措施如下：剪掉肌肉上的毛发（剪毛后：PC），用洗必泰清洁剪过的皮肤（手术准备后：PP），静脉注射美托咪定（美托咪定后：PM）。计算每块肌肉的平均StO值，并使用线性效应模型评估肌肉组和干预措施对StO的影响。在PC、PP和PM干预措施中，缝匠肌的成功StO值百分比最高（<0.001），平均（90%CI）StO值也最高。皮肤的手术准备提高了StO值测量的成功率。对于所有肌肉，注射美托咪定与较低的StO值相关（<0.001）。总之，在所检查的肌肉中，缝匠肌可能是测量马StO的首选肌肉，建议对探头放置部位进行剪毛和清洁。
