A comparison of the effects of carbon dioxide and medical air for abdominal insufflation on respiratory parameters in xylazine-sedated sheep undergoing laparoscopic artificial insemination     

JD Haan  BL Hay Kraus  SR Sathe 《New Zealand veterinary journal》2018,66(4):167-171

AIMS: To determine if abdominal insufflation with medical air will improve oxygenation and ventilation parameters when compared to insufflation with CO₂ in xylazine-sedated sheep undergoing laparoscopic artificial insemination (AI).

METHODS: Forty-seven sheep underwent oestrus synchronisation and were fasted for 24 hours prior to laparoscopic AI. Each animal was randomised to receive either CO₂ or medical air for abdominal insufflation. An auricular arterial catheter was placed and utilised for serial blood sampling. Respiratory rates (RR) and arterial blood samples were collected at baseline, after xylazine (0.1?mg/kg I/V) sedation, 2 minutes after Trendelenburg positioning, 5 minutes after abdominal insufflation, and 10 minutes after being returned to a standing position. Blood samples were collected in heparinised syringes, stored on ice, and analysed for arterial pH, partial pressure of arterial O₂ (PaO₂), and CO₂ (PaCO₂). The number of ewes conceiving to AI was also determined.

RESULTS: Repeated measures ANOVA demonstrated temporal effects on RR, PaO₂, PaCO₂ and arterial pH during the laparoscopic AI procedure (p<0.001), but no difference between insufflation groups (p>0.01). No sheep experienced hypercapnia (PaCO₂>50?mmHg) or acidaemia (pH<7.35). Hypoxaemia (PaO₂<70?mmHg) was diagnosed during the procedure in 14/22 (64%) ewes in the CO₂ group compared with 8/23 (35%) ewes in the medical air group (p=0.053). Overall, 15/20 (75%) ewes in the CO₂ group conceived to AI compared with 16/22 (72.7%) in the medical air group (p=0.867).

CONCLUSIONS AND CLINICAL RELEVANCE: There were no statistical or clinical differences in RR, PaO₂, PaCO₂, pH, or conception to AI when comparing the effects of CO₂ and medical air as abdominal insufflation gases. None of the sheep experienced hypercapnia or acidaemic, yet 42% (19/45) of sheep developed clinical hypoxaemia, with a higher percentage of ewes in the CO₂ group developing hypoxaemia than in the medical air group. Based on the overall analysis, medical air could be utilised as a comparable alternative for abdominal insufflation during laparoscopic AI procedures.  相似文献   

谷物冷却机回风利用与节能   总被引：1，自引：0，他引：1  

徐玉斌 《粮食储藏》2001,30(6):27-28

分析了谷物冷却机采用回风型冷却的节能原理及优点，回风型冷却具有重要的节能意义。  相似文献   

南方鲶肌肉,鳔及胡子鲶肌肉的水解和游离氨基酸研究   总被引：2，自引：0，他引：2  

陈定福 《西南大学学报(自然科学版)》1994,16(3):237-239

本试验测定了南方鲶肌内和鳔及胡子鲶肌肉的水解氨基酸和游离氨基酸含量，并对其营养价值进行了比较，评价。  相似文献   

沈阳空气污染的主要成因   总被引：1，自引：0，他引：1  

方向阳 《青岛农业大学学报(自然科学版)》2002,19(3)

介绍了导致中国沈阳空气污染严重的主要原因 ,并提出了解决这些问题的一些措施。在一定程度上 ,沈阳所面临的空气污染情况在中国北方城市是相当典型和普遍存在的  相似文献   

负刚度的工作原理及应用初探     

彭献  陈树年 《湖南农业大学学报(自然科学版)》1992,19(4)

This paper deals with the vibration isolation principle of a system with a negative stiffness spring and the energy analysis for this system.As an application of the method, an example of vibration systems with equal frequencies is given. It shows that th  相似文献   

电阻电桥传感放大器性能的改善     

刘春明 《大连水产学院学报》1993,8(4):43-49

在构成基本型电阻电桥传感放大器的基础上给出了三种改善其性能的方法。１）补偿法。２）补偿加放大器改进综合法。３）负反馈法。通过实验证明了理论分析和实际效果是一致的，从而对电阻传感器在非电量检测中的广泛应用具有一定的实际意义。  相似文献   

降低人造板热压机液压系统油液污染的探讨     

丁勇义 《林业机械与木工设备》2001,29(7):20-22

车间粉尘与湖湿空气是人造板热压机液压系统油液外界污染的主要原因，通过构筑封闭式泵房，增设辅助油箱，改变没箱底部结构，设置排污，排水装置，可有效降低人造板热压机液压系统油液污染，改善液压系统性能，提高压机工作效率。  相似文献   

黄刺蛾空间分布型研究及应用   总被引：3，自引：1，他引：2  

彭龙慧  裘有年 《江西农业大学学报》1994,16(1):57-61

  相似文献   

呼和浩特市南郊大气污染源调查的分析     

杨秋林  郭玲  杨性恺  席延钰 《内蒙古农业大学学报(自然科学版)》1994,(2)

呼和浩特市南郊大气污染源调查的分析杨秋林，郭玲，杨性恺，席延钰（内蒙古农牧学院基础课部，呼和浩特市，０１００１８）摘要调查了呼市南郊大气污染源的现状，分析了主要污染源和污染物，提出了对呼市南郊大气污染的防治对策和建议。关键词大气，大气污染，污染源，污...  相似文献   

扫描及负染电镜在兔脑炎原虫病诊断中的应用     

张柳平  段艳  潘耀谦  夏志平  邹啸环 《动物医学进展》2003,24(6):96-97

12只临床表现头颈歪斜、昏睡、震颤、局部或全身轻瘫的可疑为兔脑炎原虫病的獭兔 ,对其肾脏皮髓交界和尿沉渣分别进行了扫描电镜和负染电镜观察 ,看到了大小为 1～ 1 .5× 1 .4～ 2 .5μm,形态呈卵圆形和杆状的兔脑炎原虫。阳性检出率为 1 0 0 %。说明扫描及负染电镜术是诊断兔脑炎原虫病的一种较为可靠的技术。  相似文献