CN203090175U - 抗菌缓释作用医用导尿管 - Google Patents

抗菌缓释作用医用导尿管 Download PDF

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CN203090175U
CN203090175U CN 201220718495 CN201220718495U CN203090175U CN 203090175 U CN203090175 U CN 203090175U CN 201220718495 CN201220718495 CN 201220718495 CN 201220718495 U CN201220718495 U CN 201220718495U CN 203090175 U CN203090175 U CN 203090175U
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catheter
antibacterial
slow
antibiotic
release effect
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蔡文胜
米军
吴晓迪
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CHENGDU SHENGTAIER BIOLOGICAL MEDICAL TECHNOLOGY Co Ltd
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CHENGDU SHENGTAIER BIOLOGICAL MEDICAL TECHNOLOGY Co Ltd
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Abstract

本实用新型公开了一种抗菌缓释作用医用导尿管,涉及一种导尿管,包括导尿管本体,所述导尿管本体表面还结合有纳米银层,所述纳米银层外还设有抗生素层。本实用新型在导尿管滞留初期具有迅速而强力的杀菌力,同时在之后又具有良好的缓释杀菌作用。

Description

抗菌缓释作用医用导尿管
技术领域
本实用新型涉及一种导尿管。
背景技术
美国疾病控制中心(CDC)调查表明,临床细菌感染是是仅次于心脏病、癌症、和血栓引起病人死亡的第四大杀手。有报道,在所有的临床细菌感染中,导尿管所引起的尿道感染(Catheter-related urinary tract infections, CAUTI)占30%。随滞留时间增加,导尿管感染率增加。在导尿管的使用过程中,通常一次简单导尿后细菌感染率约为1-5%,滞留期超过7天的导尿管25%的会引发细菌感染,导尿时间超过14天,尿路感染发生率在90-100%,所以CAUTI是最常见的一种临床细菌感染。所以开发具有抗菌功能的医用导尿管对减少CAUTI发生和降低临床治疗费用具有重大意义。
各式各样的抗菌技术被应用到医用导管中去开发抗菌医疗导管。中国专利CN2529660描述了在导尿管球囊下方制作一段加药区,使用时根据不同情况加入各种抗生素。发明专利申请200710164113.5在导尿管表面涂抹一种缓释抗菌素的润滑胶赋予其抗菌性能。发明专利申请200820103587.0公开一种有机/无机复合抗菌导尿管的制备方法,将无机抗菌剂和有机硅乳化液混合高速搅拌,混合到导尿管原材料中,成型后在表面涂敷有季胺盐的抗菌涂层。发明专利申请200810200169.6公开了一种在医用导管材料中搀杂磷酸锆为载体的银系无机抗菌剂,其特征在于将银系无机抗菌剂和少量医用导管材料制备抗菌母料,再将抗菌母料和其余部分导管材料挤出成型制备抗菌导管。中国专利CN 2863155y描述了一种在表面涂覆纳米银的抗菌导尿管制备。
但是抗菌导尿管随着滞留时间的增加,抗菌物质在体内释放减弱,其抗菌效果也不断降低,感染几率不断增加,给患者造成痛苦,同时也给医疗和护理带来很多不便。而上述抗菌导尿管要么只是表面涂敷抗菌素,初期具有较强的抗菌作用,但该抗菌作用会迅速衰减,在更为关键的滞留后期无法发挥有效作用;要么虽然有缓释作用,但抗菌剂混合在导尿管内,难以缓释到其外表发挥有效抗菌作用,导致其缓释的抗菌作用难以有效发挥;要么直接表面涂敷纳米银,虽然有较好的缓释杀菌作用,但导尿管滞留最初期的杀菌力却不够强。
实用新型内容
本实用新型的目的在于:提出一种抗菌缓释作用医用导尿管,其在导尿管滞留初期具有迅速而强力的杀菌力,同时在之后又具有良好的缓释杀菌作用。
本实用新型的目的通过下述技术方案来实现:
一种抗菌缓释作用医用导尿管,包括导尿管本体,其特征在于:所述导尿管本体表面还结合有纳米银层,所述纳米银层外还设有抗生素层。
作为优选方式,所述抗生素层厚度为0.1um-1um,所述纳米银层厚度为1um-100um。
上述方案中,特定的厚度限定,使得外层抗生素既能快速释放,又不会干扰内层纳米银发挥缓释抗菌作用。
本实用新型的有益效果:利用了抗生素强烈杀菌作用,快速释放特点,在导尿管导入初期对患者尿道中的微生物有强烈的杀灭作用;同时还利用纳米银的广谱抗菌作用对易引起尿道炎症的大肠杆菌、金黄色葡萄球菌淋球菌、真菌、霉菌等抑制和杀灭作用;改善创伤组织微循环,有效的激活促进细胞生长,加快伤口愈合;纳米银作为银粒子库稳定长久的向外释放银粒子而达到缓释抗菌的目的,从而能有效地控制由导尿管带来的感染问题,为患者减轻痛苦。
附图说明
图1为本实用新型结构示意图
图2为图1的截面示意图
图3是本实用新型实施例的杀菌效果对比照片;
图中,1为导尿管本体,2为纳米银层,3为抗生素层。
具体实施方式
下面结合具体实施例和附图对本实用新型作进一步的说明。
参见图1、图2,本实用型新型依次由导尿管本体1,纳米银层2,抗生素层3组成。
其中纳米银层2涂覆在导尿管本体1表面外表层,在纳米银层2外部涂覆抗生素做抗生素层3,抗生素层3一般采用广谱抗生素。作为优选方式,抗生素层厚度为0.1um-1um,纳米银层厚度为1um-100um。
各层结合方式可采用化学键或浸泡成膜方式实现。
如图3所示,为表面未进行纳米银涂覆抗生素涂覆处理的导尿管(图左)与表面进行纳米银涂覆抗生素涂覆处理的导尿管(图右),用大肠埃希氏菌所做体外抗菌环实验。实验结果表面进行纳米银涂覆抗生素涂覆处理的导尿管有明显抗菌作用。
以上所述仅为本实用新型的较佳实施例而已,并不用以限制本实用新型,凡在本实用新型的精神和原则之内所作的任何修改、等同替换和改进等,均应包含在本实用新型的保护范围之内。

Claims (2)

1.一种抗菌缓释作用医用导尿管,包括导尿管本体,其特征在于:所述导尿管本体表面还结合有纳米银层,所述纳米银层外还设有抗生素层。
2.如权利要求1所述的抗菌缓释作用医用导尿管,其特征在于:所述抗生素层厚度为0.1um-1um,所述纳米银层厚度为1um-100um。
CN 201220718495 2012-12-24 2012-12-24 抗菌缓释作用医用导尿管 Expired - Fee Related CN203090175U (zh)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106139360A (zh) * 2015-03-24 2016-11-23 上海千山医疗科技有限公司 抗菌医用导管
CN107773835A (zh) * 2017-11-28 2018-03-09 无锡市第二人民医院 防逆流抗菌型导尿管及其制造方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106139360A (zh) * 2015-03-24 2016-11-23 上海千山医疗科技有限公司 抗菌医用导管
CN107773835A (zh) * 2017-11-28 2018-03-09 无锡市第二人民医院 防逆流抗菌型导尿管及其制造方法

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