麻醉给药前深呼吸对无痛胃镜检查患者低氧血症的预防作用

目的探讨麻醉给药前深呼吸对无痛胃镜检查患者低氧血症的预防作用。方法80例无痛胃镜受检者，按随机数字法分为实验组和对照组，实验组在麻醉前2min经鼻导管吸氧，并在麻醉给药前嘱咐患者进行3—5次的深呼吸，对照组仅在麻醉前2min经鼻导管吸氧。记录受检者术前、吸氧后麻醉前、术中、术后的呼吸次数和SpO2。结果麻醉后受检者SpO：均出现不同程度的下降。多数在麻醉后2min内达最低值，此时实验组组的SpO：值较对照组高（P〈0．05）；实验组低氧血症的发生率明显低于对照组方面（P〈0．05）。结论麻醉药物注入前进行鼻导管吸氧和深呼吸预处理，能提高机体氧储备，减少低氧血症发生，是无痛胃镜检查中预防低氧血症的简易、可行的方法。

Preventive Effect of Bathypnea before Anesthesia on Hypoxemia during Painless Gastroscopy

Objective To observe the preventive effect of bathypnea before anesthesia on hypoxemia during painless gastroscopy. Methods Eighty patients with gastroscopy in our hospital from June 2010 to December 2010 were randomly divided into control group （oxygen-supply begins at 3 L/min two minutes before the anetbesia） and intervention group （on the basis of control group, bathypnea before anesthesia）. Respiratory rate and SpOz of the patients were recorded before operation, 2 min after re-oxygenation, intra-and post-operation, respectively. Results SpO2 in the patients decreased with different degrees after anesthesia and reached its lowest value 2 min after anesthesia. SpO2 was higher in the interventrion group than in the control group （P 〈0.05）. The incidence of hypoxemia was significantly lower in intervention group than in control group （P 〈0.05）. Conclusions Oxygen inhalation through a nasal tube and bathypnea before anesthesia during painless gastroscopy is a safe, effective, and simple procedure for improving the body＇s oxygen reserves and reducing hypoxemia during painless endoscopy.