Mirle Elisabeth, Wogatzki Anna, Kunzmann Robert, Schoenfelder Axel M, Litzke Lutz F
Department for Equine Surgery, Justus-Liebig-Universität Gießen, Gießen, Germany.
Vet Rec Open. 2017 Apr 23;4(1):e000197. doi: 10.1136/vetreco-2016-000197. eCollection 2017.
The surgical evaluation of haemorrhagic infarcted intestine and the decision for or against bowel resection require a lot of experience and are subjective. The aim of this prospective, clinical study was to examine the correlation between oxygen saturation and small intestinal wall (IW) thickness, using two objective methods. In 22 colicky horses, the blood flow, oxygen saturation and relative amount of haemoglobin were measured intraoperatively via laser Doppler and white light spectroscopy (O2C, oxygen to see, LEA Medizintechnik) at six measuring points (MPs) in small and large intestines. Furthermore, the IW thickness was measured ultrasonographically. Nine of 22 horses had an increased small IW thickness greater than 4 mm (Freeman 2002, Scharner and others 2002, le Jeune and Whitcomb 2014) at measuring point 1 (MP1) (strangulated segment), four horses had a thickened bowel wall at measuring point 3 (MP3) (poststenotic) and one at measuring point 2 (MP2). The oxygen saturation was 0 at MP1 in six horses, at MP3 in two horses and at MP2 (prestenotic) in one. Oxygen saturation and small IW thickness were independent of each other at MP1 and MP2. At MP3, the two parameters were negatively correlated. In summary, it is not possible to draw conclusions about oxygen saturation based on IW thickness.
对出血性梗死肠段进行外科评估以及决定是否进行肠切除需要丰富的经验，且具有主观性。本前瞻性临床研究的目的是使用两种客观方法来检测氧饱和度与小肠壁（IW）厚度之间的相关性。在22匹患有绞痛的马匹中，术中通过激光多普勒和白光光谱法（O2C，可视氧，LEA Medizintechnik）在小肠和大肠的六个测量点（MPs）测量血流、氧饱和度和血红蛋白相对含量。此外，还通过超声测量IW厚度。22匹马中有9匹在测量点1（MP1）（绞窄段）处小肠IW厚度增加，大于4毫米（Freeman，2002年；Scharner等人，2002年；le Jeune和Whitcomb，2014年），4匹马在测量点3（MP3）（狭窄后）处肠壁增厚，1匹马在测量点2（MP2）处肠壁增厚。6匹马在MP1处氧饱和度为0，2匹马在MP3处氧饱和度为0，1匹马在MP2（狭窄前）处氧饱和度为0。在MP1和MP2处，氧饱和度与小肠IW厚度相互独立。在MP3处，这两个参数呈负相关。总之，不可能根据IW厚度得出关于氧饱和度的结论。
