宫缩药物诱发过度通气综合征一例

2018-06-04 李健 高德胜 阳兴 临床麻醉学杂志

产妇,33岁,身高155cm,体重56kg,因“G1P0孕34+2周,下腹痛1d余”入院。

【一般资料】

产妇,33岁,身高155cm,体重56kg

【主诉】

因“G1P0孕34+2周,下腹痛1d余”入院。

【体格检查】

体温36.7℃,HR98次/分,RR20次/分,BP118/74mmHg,ASAⅡ级,心肺未见明显异常。

【辅助检查】

术前血常规提示:Hb72g/L,Hct26%。

【初步诊断

(1)G1P0孕34+2周先兆早产;(2)双胎妊娠;(3)中度贫血。

【治疗】

拟于腰-硬联合麻醉下行子宫下段剖宫产术。产妇入室后于右侧臀部垫高约30°,常规心电监测:BP145/90mmHg,HR102次/分,RR20次/分,SpO296%,有间断宫缩痛。于L3~4间隙以针内针技术行腰-硬联合麻醉,穿刺过程顺利,腰麻用药为0.5%罗哌卡因2.8ml,向头侧置入硬膜外导管4cm,平卧位(稍左倾)下调整麻醉平面至T5。术中麻醉效果满意,给予补液及血管活性药物等措施维持循环稳定。于手术开始后第5、6分钟分别娩出一男婴及一女婴,新生儿Apgar评分分别为:1min8/9分,5min9/10分,10min10/10分。断脐后静脉输入抗生素,给予缩宫素20U宫体注射,然后以缩宫素20U加入500ml生理盐水中静滴维持。观察5min后发现子宫收缩欠佳,产科医师以卡前列素氨丁三醇250μg宫体注射,子宫收缩逐渐好转。给予上述药物约5min后,产妇诉胸闷、呼吸困难、有窒息感,并出现恶心、呕吐。此时BP100/55mmHg,HR118次/分,RR30次/分,SpO296%,心肺听诊无明显异常,双侧瞳孔等大,光反射灵敏,ECG未见明显ST-T改变。检查吸引瓶内出血约200ml,并再次确认感觉平面为T5,考虑原因为宫缩药物不良反应,给予面罩吸氧、适当升高血压(去氧肾上腺素)、镇静(咪达唑仑)、止吐(阿扎司琼)等治疗,症状无明显好转,产妇呼吸频率逐渐增快,最快达40次/分,约7min后产妇开始出现头痛、视物模糊、胸部麻木等症状。血气分析:pH7.48,PCO222.3mmHg,HCO-317.1mmol/L。提示原发性呼吸性碱中毒,嘱产妇放松,减慢呼吸频率,降低呼吸动度,采用可重复吸入面罩增加CO2重吸入,并持续泵注右美托咪定镇静,同时静脉滴注葡萄糖酸钙1g,预防呼吸性碱中毒导致的低钙血症。给予上述处理措施40min后停止镇静,产妇清醒后自觉症状明显好转。术后给予PCIA镇痛并送回产科重症监护室,并于监护室给予浓缩红细胞1U静脉输注。术后4h回访,产妇未述不适,最终诊断为过度通气综合征(hyperventilationsyndrome,HVS)。

原始出处:

李健, 高德胜, 阳兴,等. 宫缩药物诱发过度通气综合征一例[J]. 临床麻醉学杂志, 2017(2):206-207.

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    2018-09-10 windight
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    2018-06-05 飛歌

    学习了很有用

    0