Critical Hemodynamic Changes Caused by Injection of Oxytocin during Termination of Pregnancy with Propofol<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />Critical Hemodynamic Changes Caused by Injection of Oxytocin during Termination of Pregnancy with Propofol<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /> 卢家凯 博士 潘贤必 主任医师 北京军区总医院麻醉科, 北京 100700 Jiakai Lu , MD PhD and Xianbi Pan , MD Department of Anesthesia, General Hospital of Beijing Command, PLA,Beijing 100700, China ABSTRACT Objective: To observe the influence of oxytocin on blood pressure and heart rate during termination of pregnancy with propofol anesthesia. Methods: 75 patients, undergoing termination of pregnancy, were randomly allocated into three groups. Patients in group A and B(25 in each group)were anesthetized with 2~3mg.kg-1 propofol and 1μg.kg-1 fentanyl, while only patients in group A received 10 u oxytocin intravenously at the later stage of operative procedure. Patients in group C (n=25) were performed without anesthesia and 10 u oxytocin was administered at the same point as group A. Systolic pressure, diastolic pressure and heart rate were measured at 0.5 minute intervals for 3 min after injection of oxytocin or saline. Results: Critical hemodynamic fluctuation was observed within 3 min after injection of oxytocin which was typically represented by a significant falling of systolic pressure and diastolic pressure and a significant increase of heart rate. The changes of hemodynamics were returned to the baseline within 3 min without any treatment. Conclusion: Intravenous injection of oxytocin during termination of pregnancy with propofol anesthesia can result in a transient and critical hemodynamic fluctuation. More attentions should be paid to the patients with limited cardiac reserve. Further investigations to explore the mechanism are needed. Key words: Propofol; Oxytocin; Abortion; Hemodynamics 近来我们连续发现,在应用异丙酚进行无痛人工流产时,静注常规剂量的缩宫素后,患者出现显著的血压下降和心率增加。针对这个现象,我们进行了以下对比观察。 材料及方法 75例 ASAⅠ级早期妊娠并自愿接受人工流产的患者,随机分为三组:A组25例,平均年龄23±1.0岁;B组25例,平均年龄24±3.0岁。C组25例,平均年龄27±6.0岁。所有患者手术前一天完成常规检查。 所有患者术前禁食、水8 h。入室后建立外周静脉通路,输注乳酸林格液。应用惠普多功能监护仪进行ECG、NIBP、HR、SpO2及RR监测,经鼻导管吸氧3.0L•min-1。A组和B组患者平静15min后,静注阿托品0.5mg, 枸橼酸芬太尼1μg•kg-1,然后经静脉缓慢注射异丙酚2~3mg•kg-1。待患者入睡后开始手术。C组在不用任何麻醉药物的状态下接受人工流产术。手术进行至胎囊吸出后时,A组和C组患者经静脉通路缓慢注入缩宫素10 u,B组注射生理盐水1ml。分别于注射前和注射后0.5min、1.0min、1.5min、2.0min、2.5min和3.0min记录收缩压、舒张压及心率。用t检验进行统计学处理。 | N> 卢家凯 博士 潘贤必 主任医师 北京军区总医院麻醉科, 北京 100700 Jiakai Lu , MD PhD and Xianbi Pan , MD Department of Anesthesia, General Hospital of Beijing Command, PLA,Beijing 100700, China ABSTRACT Objective: To observe the influence of oxytocin on blood pressure and heart rate during termination of pregnancy with propofol anesthesia. Methods: 75 patients, undergoing termination of pregnancy, were randomly allocated into three groups. Patients in group A and B(25 in each group)were anesthetized with 23mg.kg-1 propofol and 1μg.kg-1 fentanyl, while only patients in group A received 10 u oxytocin intravenously at the later stage of operative procedure. Patients in group C (n=25) were performed without anesthesia and 10 u oxytocin was administered at the same point as group A. Systolic pressure, diastolic pressure and heart rate were measured at 0.5 minute intervals for 3 min after injection of oxytocin or saline. Results: Critical hemodynamic fluctuation was observed within 3 min after injection of oxytocin which was typically represented by a significant falling of systolic pressure and diastolic pressure and a significant increase of heart rate. The changes of hemodynamics were returned to the baseline within 3 min without any treatment. Conclusion: Intravenous injection of oxytocin during termination of pregnancy with propofol anesthesia can result in a transient and critical hemodynamic fluctuation. More attentions should be paid to the patients with limited cardiac reserve. Further investigations to explore the mechanism are needed. Key words: Propofol; Oxytocin; Abortion; Hemodynamics 近来我们连续发现,在应用异丙酚进行无痛人工流产时,静注常规剂量的缩宫素后,患者出现显著的血压下降和心率增加。针对这个现象,我们进行了以下对比观察。 材料及方法 75例 ASAⅠ级早期妊娠并自愿接受人工流产的患者,随机分为三组:A组25例,平均年龄23±1.0岁;B组25例,平均年龄24±3.0岁。C组25例,平均年龄27±6.0岁。所有患者手术前一天完成常规检查。 所有患者术前禁食、水8 h。入室后建立外周静脉通路,输注乳酸林格液。应用惠普多功能监护仪进行ECG、NIBP、HR、SpO2及RR监测,经鼻导管吸氧3.0L?min-1。A组和B组患者平静15min后,静注阿托品0.5mg, 枸橼酸芬太尼1μg?kg-1,然后经静脉缓慢注射异丙酚2~3mg?kg-1。待患者入睡后开始手术。C组在不用任何麻醉药物的状态下接受人工流产术。手术进行至胎囊吸出后时,A组和C组患者经静脉通路缓慢注入缩宫素10 u,B组注射生理盐水1ml。分别于注射前和注射后0.5min、1.0min、1.5min、2.0min、2.5min和3.0min记录收缩压、舒张压及心率。用t检验进行统计学处理。 |