title: Putting a Class I Stocking over a Class I Stocking Does Not Make a Class II Stocking.
abstract: OBJECTIVE
  To evaluate the interface pressures (IP) obtained by double compression stockings.
  
  
  METHODS
  Ten healthy volunteers with legs fitting size S stockings wore single and double class I stockings, sizes S to 4L. We measured IPs with the patient wearing each stocking standing and supine.
  
  
  RESULTS
  IPs obtained wearing double S size stockings, standing and supine, were 1.7 times and 20 mmHg higher than those obtained by a single S size stocking (52.1 ± 4.7 and 46.4 ± 4.5 mmHg vs. 31.5 ± 3.3 and 27.3 ± 2.3 mmHg, respectively). Despite the decreasing IP with increased stocking sizes, all IPs obtained by double stockings, standing and supine, even with size 4L (43.2 ± 5.1 and 37.3 ± 5.5 mmHg respectively), were significantly higher than those obtained by a single S stocking.
  
  
  CONCLUSIONS
  Significantly higher IPs were achieved standing and supine, by doubling stockings. We should rather be aware that double stockings in the supine position can result in excessively high IPs.
authors: Division of Vascular Surgery, Department of Surgery and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan.
authors: Kotaro
authors: K
authors: Suehiro
authors: Noriyasu
authors: N
authors: Morikage
authors: Masanori
authors: M
authors: Murakami
authors: Osamu
authors: O
authors: Yamashita
authors: Makoto
authors: M
authors: Samura
authors: Kimikazu
authors: K
authors: Hamano
keywords: compression stocking; interface pressure; static stiffness index
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