Placebo-type compression orthosis
US7169122B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2001 |
| Grant date | Jan 30, 2007 |
| Priority date | — |
| Expiry date | Mar 4, 2022 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD10B2509/028
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The surgical stocking made by knitting a knitting yarn together with an extensible weft yarn is a placebo type stocking suitable for exerting compressive pressure at the ankle of less than 8 mmHg, and preferably less than 5 mmHg. It is intended for double blind tests versus placebo using a product having the same structure, the same visual appearance, and the same feel as an active stocking but compression that is negligible and thigh/ankle degressivity that is close to unity. The weft yarn presents mass per unit length lying in the range 250 dtex to 600 dtex, preferably in the range 350 dtex to 500 dtex, with the proportion of elastic material being less than 25% and preferably less than 20% of the total weight of the thread. Its elongation capacity lies in the range 200% to 350%, preferably in the range 200% to 300%, but its springiness (II) is very different from that of an elastic stocking (I).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.