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An orthosis (10) has an elastic compressive distal portion (14), extending upwards from the ankle, associated with an adjacent rigid splint proximal portion (16), enveloping the region of the calf between the level of the point where the Achilles tendon joins the calf muscles and the level located b

An orthosis (10) has an elastic compressive distal portion (14), extending upwards from the ankle, associated with an adjacent rigid splint proximal portion (16), enveloping the region of the calf between the level of the point where the Achilles tendon joins the calf muscles and the level located below the tibial tuberosity. This rigid splint proximal portion (16) is an essentially non-elastic, deformable tubular portion, made by: placing the orthosis onto a template representative of the morphology of the patient's calf; applying in situ on the orthosis, in the region of the splint proximal portion, a hardenable biocompatible resin; hardening the resin with the orthosis maintained on the template; and removing the orthosis in its finished state.

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1. A method for tailoring an orthosis for medical compression/splinting of a lower limb to a measure of a patient's leg, said method comprising the steps of: obtaining an orthosis (10), said orthosis comprising: (i) an elastic compressive distal portion, adapted to cover an ankle, extending to befor

1. A method for tailoring an orthosis for medical compression/splinting of a lower limb to a measure of a patient's leg, said method comprising the steps of: obtaining an orthosis (10), said orthosis comprising: (i) an elastic compressive distal portion, adapted to cover an ankle, extending to before a beginning of a calf, at a point where an Achilles tendon joins calf muscles, the distal portion being made by knitting a knit yarn and a weft yarn, a dimensioning and a nature of the knit and weft yarns as well as a knit structure being selected in such a way to exert in a circumference direction, once that orthosis has been placed on the limb, an elastic return force likely to produce a compression of the limb at a desired therapeutic level of pressure, and(ii) a splint proximal portion, continuing the compressive distal portion and adjacent thereto, and enveloping, over a circumference thereof, a region of the calf comprised between a level of a point where the Achilles tendon joins the calf muscles and the level located below the tibial tuberosity;obtaining a hardenable biocompatible resin;placing the orthosis onto the patient's leg or a template representative of a morphology of the patient's calf;applying in situ on the orthosis over a whole circumference of a region of the splint proximal portion, said hardenable biocompatible resin;hardening the resin with the orthosis maintained on the patient's leg or the template; andremoving the orthosis in a finished state, wherein the orthosis in the finished state is such that the splint proximal portion (16) is made rigid following the hardening of the resin and keeps corresponding dimensions of the patient's calf, which allows this splint proximal portion to perfectly fit a shape of the calf, while the compressive distal portion is still elastic to provide a therapeutic-level compression. 2. The method of claim 1, wherein the biocompatible resin is an evaporation-hardenable single component acrylic resin. 3. The method of claim 1, wherein the knit yarn and/or the weft yarn is a polyamide and/or cotton covered spandex yarn. 4. The method claim 1, wherein the splint proximal portion is a portion having, at a level of a calf maximum circumference, a high rigidity, of 15±2 mmHg/cm (≈20±2 mPa/cm). 5. The method of claim 1, wherein the splint proximal portion is a portion having, at a level of a calf maximum circumference, a moderate rigidity, of 5±2 mmHg/cm (≈7±2 mPa/cm). 6. The method of claim 1, wherein the elastic compressive distal portion is a low compression portion adapted to exert a pressure of 10 to 20 mmHg (13 to 27 hPa) at a level of an ankle minimum circumference. 7. The method of claim 1, wherein the elastic compressive distal portion is a moderate compression portion adapted to exert a pressure of 20 to 30 mmHg (27 to 40 hPa) at a level of an ankle minimum circumference. 8. The method of claim 1, wherein the biocompatible resin is applied with a brush, by controlled spraying or by dipping. 9. The method of claim 1, wherein in the finished state, the orthosis can be temporarily removed once it has been placed on said leg. 10. A kit to achieve a method according to claim 1, for tailoring an orthosis for medical compression/splinting of a leg of a patient, said leg comprising an ankle, an Achilles tendon, a tibial tuberosity, and a calf comprising calf muscles, said kit comprising: an orthosis comprising: an elastic compressive distal portion, adapted to cover said ankle, extending to before a beginning of said calf, at a point where the Achilles tendon joins said calf muscles, the elastic compressive distal portion being made by knitting a knit yarn and a weft yarn, a dimensioning and a nature of the knit and weft yarns as well as a knit structure being selected in such a way to exert in a circumference direction, once the orthosis has been placed on said leg, an elastic return likely to produce a compression of the leg at a desired therapeutic level of pressure, anda splint proximal portion, continuing the compression distal portion and adjacent thereto, and enveloping, over a circumference thereof, a region of the calf comprised between a level of the point where the Achilles tendon joins the calf muscles and a level located below the tibial tuberosity, anda hardenable biocompatible resin, separated from the orthosis. 11. A kit according to claim 10, wherein the elastic compressive distal portion and the splint proximal portion are both knitted continuously during a single sequence on a knitting machine. 12. A method to improve calf musculo-sponeurotic pump efficiency of a patient, wherein an orthosis manufactured according to claim 1 is placed on a leg of the patient.