PO：每口

“Per Oral”在医学及药学领域常缩写为“PO”，主要用于快速书写和便捷使用。这一术语在综合类文档中广泛出现，尤其常见于未分类的通用场景。其对应的中文含义为“每口”或“经口”，通常指药物通过口服途径给予。

Influence of indwelling gastric tube per nasal and per oral on ventilation function of newborns with critical illness
经鼻与经口留置胃管对危重新生儿通气功能的影响
An Experimental Study on the Effect of the Per Oral(PO) Solution Extracted from Chicken Embryo on Immunologic Function
鸡胚口服液免疫调节作用的实验研究
Other groups were injected in the abdominal cavity 1mL / kg 40 % CCl4 - oil ( 2 times per week ), while oral administration, 1 time per day for 4 weeks.
除模型组外，其余各组腹腔注射的同时灌胃给药，每日1次，共4周。
Gastrolavage per mouth was given to 18 cases who had been toxic because of oral administration of drugs. the poison content of the eluate was determined.
对口服药物中毒的18例患者，进行经口插管洗胃，并分别留取洗出液进行毒物检测，目测洗出液澄清无味时留取最终标本检测毒物含量。
24-48 hours later, oral amiodarone with 600 mg per day were given, and then reduced the dosage of drug to a oral maintenance dose of 200 mg per day step by step.
静脉维持用药24~48h后给予口服胺碘酮600mg/d，并逐渐减至200mg/d维持。

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