硼酸有什么副作用?

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2025-03-13 22:43:27
推荐回答(1个)
回答1:

硼酸为弱防腐药,对细菌和真菌有弱的抑制作用。常用于皮肤、鼻腔、口腔、膀胱、阴道冲洗,以及治疗细菌和真菌感染。 硼酸无论是服用或外用,都证明它是有毒性的。Goldbloom收集了文献报道的病例并作了详细的分析。在172例硼酸中毒症中,有83例死亡(见表21—1)。有37人是外用硼酸后死亡的,其中23例有尿布疹。 硼酸甚至能穿透完好的皮肤,但它一般容易被炎症或受损的皮肤以及通过粘膜被吸收。可由于大量吸收而引起急性中毒,婴儿尤易致死。Schtlppli等用硼酸湿敷在21名病人完好的和患湿疹的皮肤上,除一名病人确实出现血硼酸水平明显升高,其他的病人血硼酸水平没有升高。作者认为这个病人可能有肾功能不全。 【急性中毒】急性中毒后会逐渐出现一些中毒症状。服人中毒剂量的硼酸后,典型的临床症状是从持续性的呕吐和腹泻(粘液状带血,呈蓝绿色)开始的。在胃肠道症状发作后不久(一些中毒病例甚至会更早)即出现皮疹(斑疹和/或丘疹),先从腹部、生殖器和头部开始,很快扩散,1~2天后出现表皮脱落和大面积脱屑,常常波及粘膜,尤其 是幼婴,其口腔、喉部和结膜出现炎症。稍后会出现中枢神经系统症状,如头痛和精神错乱,随后发生惊厥。儿童开始时出现假性脑膜炎及面部和四肢肌肉颤缩,随后出现惊厥。可能出现少尿或无尿、高钠血症、高氯血症、高钾血症、蛋白尿、血尿和管型尿的肾小管坏死。最后为高热、血压下降、心动过速和接踵而来的休克。中毒的病人约有半数死亡。 【致死剂量范围】婴儿为1~3g,幼童为5g,成人为15~20g。1964年Wang等报道11名新生婴儿意外服入硼酸,有5人(服入4.5~14g)3天后死亡,其余6人(服人2.O~4.5g)幸免。1969年Skipworlth等报道1例3岁儿童使用含硼酸的爽身粉后,出现急性硼酸中毒。Balian等也提出过类似的病例。一名27日龄的女婴在出生后的第3周出现尿布湿疹,因为她的母亲在48小时内给她用了10~15次硼酸粉。腹膜透析后的30~34小时,血清硼酸浓度为30.3mg/d1和35.4mg/d1。在腹膜透析期间分离出总数为720mg的硼酸。1970年Hilman等报道用硼酸反复洗涤剥脱的脐带残端后,出现全身性红斑和皮肤脱屑、发热、惊厥和腹泻。 在前列腺切除后随即用3%硼酸冲洗膀胱,会引起中毒,可能致死。1975年Stolp—mann等报道l例62岁男性意外服人.40g硼酸,出现急性中毒,经血液透析后痊愈。Pinto提到在2年半时间内向纽约市毒物管制中心报告急性硼酸中毒的就有14例,测定了这些病人的维生素B2的排泄情况,约有2/3的病例排泄明显增多,因为维生素Bz(核黄素)能和硼酸形成水溶性络合物。 【慢性中毒】硼酸排泄缓慢,反复应用可产生蓄积,导致慢性中毒。表现为食欲减退、体重下降、恶心、轻度腹泻、皮疹、弥漫性脱发、惊厥和贫血、月经紊乱。Gor-don和Stein分别报道过2例婴儿和1例32岁癫痫妇女慢性中毒的病例。所出现的症状包括头发稀疏、头皮呈红斑状、脑电图不正常、正常血红细胞性和血红蛋白过少性贫血、虚弱和惊厥发作等,这些症状在停药数周后即消失。 联系到一些急性硼酸中毒病人维生素B2尿排泄增多的事实,Pinto指出硼酸是众所周知的鸡胚胎致畸剂,硼酸在鸡身上的致畸方式与维生素B2缺乏产生的畸形相似,补充维生素B2后,硼酸产生的各种类型的畸形大大减少。 考虑到硼酸的毒性高和治疗用途有限,所以,许多国家认为它已经过时并且禁止使用。但它仍常被用于完好皮肤的消毒。

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