Cornwall J V, Doré C J, Lewis J D
Northwick Park Hospital, Harrow, Middlesex.
Br Med J (Clin Res Ed). 1987 Oct 31;295(6606):1087-90. doi: 10.1136/bmj.295.6606.1087.
Graduated compression is important in improving venous function, but the pressure profiles of different brands of stockings in situ and effects on a direct measure of venous function have not been investigated. The pressure profiles of 15 different types of below knee compression stockings were established with a medical stocking tester in 13 healthy volunteers. Analysis of variance was performed for each stocking separately, considering the factors of size of stocking, site of measurement, and their interaction. The criteria used to define satisfactory function were that the stockings should have a significant linear trend with site--that is, graduation--and no other significant effects. Only five types of stockings met these standards. Venous function was then assessed by photoplethysmography in 19 patients with defined venous abnormalities. For each patient the effect on venous refilling time of three satisfactory and three unsatisfactory stockings was assessed. The three satisfactory stockings gave refilling times that were not significantly different from normal in patients with both superficial and deep vein incompetence, while refilling times with the three unsatisfactory stockings remained significantly below normal in all patients with deep vein incompetence; one stocking had no significant effect on refilling times in either group. Functional testing of compression hosiery should form part of future British Standards specifications.
分级加压对于改善静脉功能很重要，但不同品牌长袜在实际使用中的压力分布以及对静脉功能直接测量的影响尚未得到研究。在13名健康志愿者身上，使用医用长袜测试仪确定了15种不同类型的膝下加压长袜的压力分布。对每一种长袜分别进行方差分析，考虑长袜尺寸、测量部位及其相互作用等因素。用于定义满意功能的标准是，长袜应与测量部位有显著的线性趋势——即分级——且无其他显著影响。只有五种长袜符合这些标准。然后，对19名确诊有静脉异常的患者进行光电容积描记法评估静脉功能。对每位患者评估三种满意和三种不满意长袜对静脉再充盈时间的影响。在浅静脉和深静脉功能不全的患者中，三种满意的长袜给出的再充盈时间与正常情况无显著差异，而在所有深静脉功能不全的患者中，三种不满意长袜的再充盈时间仍显著低于正常水平；有一种长袜对两组患者的再充盈时间均无显著影响。加压袜的功能测试应成为未来英国标准规范的一部分。
