中国组织工程研究 ›› 2018, Vol. 22 ›› Issue (6): 927-931.doi: 10.3969/j.issn.2095-4344.0070

• 生物材料基础实验 basic experiments of biomaterials • 上一篇    下一篇

血液透析导管中残留单体二苯基甲烷二异氰酸酯的检测

黄元礼,孙  雪,柯林楠,王春仁
  

  1. 中国食品药品检定研究院医疗器械所,北京市  102629
  • 收稿日期:2018-01-12 出版日期:2018-02-28 发布日期:2018-02-28
  • 通讯作者: 柯林楠,硕士,副主任技师,中国食品药品检定研究院医疗器械所,北京市 102629
  • 作者简介:黄元礼,2015年中国医学科学院药物研究所毕业,药学硕士,助理研究员,主要从事医疗器械化学性能评价研究以及组织工程产品、生物材料性能评价研究。
  • 基金资助:
    国家重点研发计划(2016YFC1101202) 

Detection of residual diphenylmethane diisocyanate monomer in a hemodialysis catheter

Huang Yuan-li, Sun Xue, Ke Lin-nan, Wang Chun-ren
  

  1. Laboratory of Medical Devices, the National Institutes for Food and Drug Control, Beijing 102629, China
  • Received:2018-01-12 Online:2018-02-28 Published:2018-02-28
  • Contact: Ke Lin-nan, Master, Associate chief technician, Laboratory of Medical Devices, the National Institutes for Food and Drug Control, Beijing 102629, China
  • About author:Huang Yuan-li, Master, Research assistant, Laboratory of Medical Devices, the National Institutes for Food and Drug Control, Beijing 102629, China
  • Supported by:
    the National Key Research and Development Program of China, No. 2016YFC1101202

摘要:

文章快速阅读:

 

文题释义:
可耐受摄入量(tolerable intake,TI):在规定时间周期内,根据体质量计算的被认为不会明显危害健康的对一种物质的日平均摄入量,通常用毫克每千克每日表示[mg/(kg•d)]。
可耐受接触(tolerable exposure,TE):可耐受摄入量,体质量和应用因子的乘积,其中,应用因子表示考虑医疗器械使用频次和与其他预期含有同一种物质的医疗器械一起使用时的数值。
 
背景:目前,含聚氨酯医疗器械的质量控制文件和技术标准中均未明确残留单体二苯基甲烷二异氰酸酯(diphenylmethane diisocyanate,MDI)的控制指标及检测方法,考虑到MDI对人体具有致癌的潜在风险,为控制该类产品的安全有效性,应及早建立质量标准。
目的:建立测量血液透析导管中残留单体MDI的测试方法,分析该产品的MDI溶出量对人体是否存在风险。
方法:取血液透析导管样品用乙酸乙酯加热回流,采用气相色谱法分析MDI含量。色谱条件为:DB-5 MS色谱柱(30 m×0.25 mm),起始温度60 ℃,保持5 min,然后以15 ℃/min升至280 ℃,保持6 min;进样口温度280 ℃;检测器:FID,温度 280 ℃;载气:氦气,99.999%。
结果与结论:MDI在4.970-99.40 mg/L(r=0.999 64)范围线性关系良好;平均加标回收率为100.9%,相对标准偏差(RSD)=3.2%(n=6)。3批样品的MDI残留量低于可耐受接触量。该方法灵敏、快速、准确、专属性强,可为血液透析导管的质量标准研究提供依据。

关键词: 血液透析导管, 气相色谱, 残留单体, 二苯基甲烷二异氰酸酯, 生物材料

Abstract:

BACKGROUND: In the current quality control file or technical standards of the hemodialysis catheter, the indicators of the component contents and detection methods of the residual diphenylmethane diisocyanate (MDI) monomer are undefined. To ensure the safety and effectiveness of these products, we should try to establish and improve the quality standards.
OBJECTIVE: To establish a method for determination of the residual MDI monomer in a hemodialysis catheter by gas chromatography (GC), and to analyze the bio-security of the MDI.
METHODS: Samples collected in the hemodialysis catheter were heated to reflux with ethyl acetate and the residual MDI content was analyzed by the GC. The GC separation was performed on a DB-5 MS column (30 m×0.25 mm), the temperature of which rose by program. The initial temperature was 60 ℃, maintained for 5 minutes, rose to 280 ℃ with a rate of 15 ℃/min, and maintained for 6 minutes. The temperature of the Injector and FID detector was both 280 ℃. Carrier gas was 99.999% nitrogen.
RESULTS AND CONCLUSION: The linearity was achieved in the range of 4.970-99.40 mg/L (r=0.999 64) for MDI. The mean recovery rate was 100.9% with the relative standard deviation of 3.2% (n=6). The residue of MDI monomer in the three batches of samples was lower than the tolerable exposure. Therefore, it is a sensitive, rapid, accurate, specific method that can be used for the quality control of the residual MDI monomer in the hemodialysis catheter. 

Key words: Renal Dialysis, Catheters, Indwelling, Chromatography, Gas, Polyamines, Tissue Engineering

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