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本文研究发现在连硬膜外麻醉下行腹腔探查时病人ＳＡＰ、ＤＡＰ、ＨＲ均下降（Ｐ＞０．０５），而当塞棉垫时则下降更甚（Ｐ＜０．０５），动脉血气检查发现进腹腔探查时动脉血氧分压（ＰａＯ＿２）下降（Ｐ＞０．０５），塞棉垫时则显著下降（Ｐ＜０．０５），而动脉血二氧化碳分压（ＰａＣＯ２）及氢离子浓度变化无统计学意义（Ｐ＞０．０５）。其机理是全宫切除术进腹探查，特别是塞棉垫时，因强烈的刺激，导致有害的迷走－迷走神经反射及机械压迫作用，引起动脉血压及心率明显下降，亦导致呼吸功能紊乱，如ＰａＯ２下降等。这些变化对病人极其有害，特别是有循环及时吸系统疾患者，严重者可危及生命。
This study found that patients undergoing epidural anesthesia undergoing abdominal cesarean visits decreased in patients with SAP, DAP, HR (P> 0.05), but when the plug cotton pad decreased more significantly (P <0.05), arterial blood gas examination PaO2 decreased (P> 0.05) and decreased significantly (P <0.05) when it was inflated into the abdominal cavity. PaCO2 and hydrogen ion concentration No significant change (P> 0.05). The mechanism is the hysterectomy into the abdomen exploration, especially the plug pad, due to strong stimulation, leading to harmful vagal - vagal reflex and mechanical compression, causing arterial blood pressure and heart rate decreased significantly, also lead to respiratory disorders, such as PaO2 and so on. These changes are extremely detrimental to the patient, especially those who have circulatory and systemic sufferers in a timely manner, and those who are seriously ill can be fatal to life.