生理盐水和葡萄糖溶液在应用上的区别是什么

2025-03-29 10:57:37
推荐回答(1个)
回答1:

葡萄糖溶液在不同用途时浓度不同:(1)补充热能 患者因某些原因进食减少或不能进食时,一般可予25%葡萄糖注射液静脉注射,并同时补充体液.葡萄糖用量根据所需热能计算. (2)全静脉营养疗法 葡萄糖是此疗法最重要的能量供给物质.在非蛋白质热能中,葡萄糖与脂肪供给热量之比为2:1.具体用量依据临床热量需要而定.根据补液量的需要,葡萄糖可配制为25%~50%的不同浓度,必要时加入胰岛素,每5~10g葡萄糖加入正规胰岛素1单位.由于正常应用高渗葡萄糖溶液,对静脉刺激性较大,并需输注脂肪乳剂,故一般选用大静脉滴注. (3)低血糖症,重者可先予用50%葡萄糖注射液20~40ml静脉推注. (4)饥饿性酮症,严重者应用5%~25%葡萄糖注射液静脉滴注,每日100g葡萄糖可基本控制病情. (5)失水 等渗性失水给予5%葡萄糖注射液静脉滴注. (6)高钾血症 应用10%~25%注射液,每2~4g葡萄糖加1单位正规胰岛素输注,可降低血清钾浓度.但此疗法仅使细胞外钾离子进入细胞内,体内总钾含量不变.如不采取排钾措施,仍有再次出现高钾血症的可能. (7)组织脱水 高渗溶液(一般采用50%葡萄糖注射液)快速静脉注射20~50ml.但作用短暂.临床上应注意防止高血糖,目前少用.用于调节腹膜透析液渗透压时,50%葡萄糖注射液20ml即10g葡萄糖可使1L腹膜透析液渗透压提高55mOsm/kgH2O. 生理盐水就是0.9%的氯化钠水溶液,因为它的渗透压值和正常人的血浆、组织液都是大致一样的,所以可以用作补液(不会降低和增加正常人体内钠离子浓度)以及其他医疗用途,也常用作体外培养活组织、细胞.是人体细胞所处的液体环境浓度.

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