中国组织工程研究 ›› 2022, Vol. 26 ›› Issue (15): 2367-2371.doi: 10.12307/2022.592

• 骨科植入物 orthopedic implant • 上一篇    下一篇

次氯酸对骨科内固定物表面细菌生物膜的清除作用

梁金正1,邵欣欣2,杜少华1,戴双武1    

  1. 1南方医科大学第三附属医院骨科医学中心骨肿瘤科,广东省广州市   510630;2中山大学附属第一医院麻醉科,广东省广州市   510080
  • 收稿日期:2021-08-25 修回日期:2021-10-12 接受日期:2021-11-15 出版日期:2022-05-28 发布日期:2022-01-06
  • 通讯作者: 戴双武,在读博士,主治医师,南方医科大学第三附属医院骨科医学中心骨肿瘤科,广东省广州市 510630
  • 作者简介:梁金正,男,1994年生,广东省云浮市人,汉族,骨科住培医师,主要从事骨感染等方面研究。
  • 基金资助:
    广东省科技计划项目(2020A1414050028),项目负责人:戴双武

Scavenging effect of hypochlorous acid on bacterial biofilm on the surface of orthopedic internal fixation devices

Liang Jinzheng1, Shao Xinxin2, Du Shaohua1, Dai Shuangwu1   

  1. 1Department of Musculoskeletal Oncology, Center for Orthopedic Surgery, the Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, Guangdong Province, China; 2Department of Anesthesiology, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, Guangdong Province, China
  • Received:2021-08-25 Revised:2021-10-12 Accepted:2021-11-15 Online:2022-05-28 Published:2022-01-06
  • Contact: Dai Shuangwu, MD candidate, Attending physician, Department of Musculoskeletal Oncology, Center for Orthopedic Surgery, the Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, Guangdong Province, China
  • About author:Liang Jinzheng, Resident of the Center for Orthopedic Surgery, the Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, Guangdong Province, China
  • Supported by:
    the Science and Technology Project of Guangdong Province, No. 2020A1414050028 (to DSW)

摘要:

文题释义:
次氯酸:化学式HClO,是氯气溶解于水时形成的一种一价氯的含氧弱酸。在工业上,次氯酸作为家用漂白剂和清洁剂中的活性成分而广为人知。在生物学系统中,次氯酸可被视为白细胞例如中性粒细胞和单核细胞产生的毒性最强、丰度最高的氧化剂。
细菌生物膜:也称为生物被膜,是指附着于有生命或无生命物体表面被细菌胞外大分子包裹的有组织的细菌群体,存在各种主要的生物大分子如蛋白质、多糖、DNA、RNA、肽聚糖、脂和磷脂等物质。细菌生物膜多细胞结构的形成是一个动态过程,包括细菌起始黏附、细菌生物膜发展和成熟扩散等阶段。细菌生物膜对抗生素和宿主免疫防御机制的抗性很强。

背景:骨科内固定物感染中形成的细菌生物膜是临床非常棘手的问题。次氯酸作为一种高效消毒剂,可引起细菌生物膜破坏,可能对骨科内固定物感染治疗有帮助。
目的:研究次氯酸溶液体外浸泡不同时间及灌注对骨科内固定物表面细菌生物膜的清除作用。
方法:将金黄色葡萄球菌和铜绿假单胞菌分别在骨科钢板内固定物上定植3 d后形成细菌生物膜,扫描电镜下确认细菌生物膜已形成。采用次氯酸溶液分别浸泡已形成两种细菌生物膜的内固定物0,5,10,20 min及20 min+灌注6 L次氯酸和生理盐水的混合溶液(每3 L生理盐水加入120 mL次氯酸),扫描电镜下观察细菌生物膜形态,评估次氯酸溶液对内固定物细菌生物膜的清除效果。
结果与结论:①铜绿假单胞菌:扫描电镜下可见,未经次氯酸溶液浸泡的内固定物上的细菌生物膜斑块面积大且较厚,菌落密集集中;经过次氯酸浸泡5,10,20 min后,细菌生物膜斑块面积逐渐减小并变薄,次氯酸溶液浸泡20 min+灌注6 L次氯酸和生理盐水的混合溶液可清除细菌生物膜;②金黄色葡萄球菌:扫描电镜下的表现与铜绿假单胞菌生物膜一致;③结果表明:延长浸泡时间或联合灌注可增强次氯酸对内固定物细菌生物膜的清除作用;次氯酸溶液浸泡足够时长可降解破坏内固定物上定植的细菌生物膜,清除菌落,从而达到消毒目的。

https://orcid.org/0000-0001-6824-5950 (梁金正) 

中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱;骨折;内固定;数字化骨科;组织工程

关键词: 次氯酸, 细菌生物膜, 骨科手术, 骨科内固定物, 感染, 消毒剂

Abstract: BACKGROUND: Biofilm formation during the infection of orthopedic fixation devices is a very difficult clinical problem. Hypochlorous acid, as a highly effective disinfectant, can destroy the bacterial biofilm, which may be helpful for treating infection of orthopedic fixation devices.  
OBJECTIVE: To study the scavenging effect of hypochlorous acid on bacterial biofilm on the surface of orthopedic fixation devices after soaking and perfusion for different time in vitro.
METHODS: Staphylococcus aureus and Pseudomonas aeruginosa were colonized on orthopedic steel fixation devices for 3 days, and then the bacterial biofilm formed, which was confirmed by scanning electron microscope. Orthopedic fixation devices with two kinds of bacterial biofilms were soaked in hypochlorous acid for 0, 5, 10, and 20 minutes, or perfused with 6 L of a mixed solution of hypochlorous acid and saline (every 3 L of saline with addition of 120 mL of hypochlorous acid) for 20 minutes. The morphology of bacterial biofilms was observed under scanning electron microscope, and the scavenging effect on the bacterial biofilm on the surface of orthopedic internal fixation devices was then evaluated.  
RESULTS AND CONCLUSION: Pseudomonas aeruginosa: Under the scanning electron microscope, the bacterial biofilm plaques on the surface of the internal fixation device that was not soaked in hypochlorous acid solution were large and thick, and the colonies were densely concentrated. After 5, 10, and 20 minutes soaking in hypochlorous acid, the bacterial biofilm plaque area was gradually decreased and became thinner. Perfusion with 6 L of a mixture of hypochlorous acid and saline for 20 minutes could remove the bacterial biofilm. Staphylococcus aureus: The performance under the scanning electron microscope was consistent with the biofilm of Pseudomonas aeruginosa. To conclude, prolonging the soaking time or a mixed perfusion can enhance the scavenging effect of hypochlorous acid on the bacterial biofilm on the surface of internal fixation devices. By soaking in hypochlorous acid for a sufficient time, the bacterial biofilm colonized on the surface of orthopedic internal fixation devices can be degraded and destroyed, thus achieving the purpose of disinfection.

Key words: hypochlorous acid, bacterial biofilm, orthopedic surgery, orthopedic internal fixation device, infection, disinfectant

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