DE1817380A1 - Artificial foot spaced from leg stump by air - cushion and foam - Google Patents

Abstract

The amputated leg stump is separated from an artificial plastics foot by an air cushion and a layer of plastics foam. The air cushion is provided with a valve controlled inlet. The foot is partially made of polyurethane foam.

Description

t e n t a n m e l Method of making prostheses for short Tarsus stumps.

Description In all processes for the manufacture of prostheses for short foot stumps have so far been limited to the use of light wood, Cork or similar materials, whereby it was at best possible by incorporation Mimicking joints missing from rubber parts or hinges.

By removing the front section of the foot, the entire Body load exclusively on the heel and this is therefore around the ground Ankle joint axis pivoted, as all foot levers are also in their front attachment points disappear, the flexor group (Achilles tendon) no longer has an equivalent force against, so that the plantarward pivoting of the heel is still natural is reinforced.

Important surgeons and surgeons of our century (Sauerbruch, Payr, Lotsch and Hohmann) therefore saw the operation of short tarsus stumps as extremely unfavorable and inferior to the lower leg amputation.

In 1961, Dr Marquardt wrote in his Orthopedic Handbook, that short tarsus should not be performed and recommends instead an immediate stiffening operation e.g. according to Pirogoff (removal of the tarsus, osseous rigidity of the heel-tibia-fibula) In recognizing this so conditioned force and Pressure conditions therefore remained no other choice for the prosthetic solution, as it did the constant swiveling of the heel constantly puts very strong pressure on the residual stump which led to skin damage and ultimately those listed above Made surgical methods appear cheaper as a permanent solution.

Since the maintenance of joint mobility in the upper and lower ankle, and the promotion of blood circulation is an advantage that should not be underestimated, the inventive method relies on the use of a polyurethane thermoplastic manufactured prosthesis, which is equipped with a changeable cushion. The air cushion extends from the @er @@@@ half the remaining sole of the foot over the stump, distal to the lower leg.

This resiliently absorbs the ground pressure ventral-plantar and protects the skin from pressure damage.

The air is during the unrolling course when stepping through the stump elastically displaced and returns to after the end of the load (step) Feel back and bring the residual limb into its dorsiflexed starting position, whereby it is always possible anew to use the stump end as a lever arm for stepping aid and not, as was previously the case with the old restoration method, swiveling the heel around the ankle axis is possible at the bottom.

The prosthesis manufactured according to the method according to the invention is expedient Worn in a high shoe, and after several years of trying it was taken care of by ao Patients cannot distinguish the gait pattern from the normal and a real permanent solution has been found.

The pivoting of the heel forward is considered to be permanent Avoided by the air cushion and the active movement of the residual sump from dorsal after plantar as active muscle or Working cycle, whereby the return and suspension effect through flexible thermoplastic and polyurethane structures according to the The tip of the prosthesis is reinforced.

Claims (1)

P a t e n t a n s p r u c h Procedure for prosthetic restoration of short tarsus stumps the use of a thermoplastic soleplate with fabric inclusion on which to Transition of the course of forces resp. to achieve the outline of a normal shoe Cork support body-thermoplastic parts are applied, which under a bell with Polyurethane are foamed, at the same time a variable by means of a valve Air cushion is poured in, through which on a total amputation respectively. stiffening Surgery can be dispensed with in the interests of the patient. Due to constant displacement with the load respectively. Return of the air After the relief under the remaining foot loop, the stump is protected from pressure damage protected, the blood circulation stimulated, a swing of the Perse towards the ground avoided, as well as the stump through its constant dorsiflexed output algae as a lever arm actively used for step assistance, with the achievement of a normal gait pattern preventive, health-promoting for the entire body statics. Furthermore, the prosthesis made in this way to the butt tip is due to the use of polyurethane foam soft, resilient and elastic, with the specific weight that is far below the old conventional.