SU1577783A1 - Method of manufacturing stump casts - Google Patents

Abstract

The invention relates to medicine, more specifically to prosthetics and prosthesis, and can be used in the manufacture of lower-limb prosthetic liners. The purpose of the invention is to improve the quality of the cast by improving the smoothness of the outline of its contours. The method involves making a strap elongating the lining of a low-density bulk filler in an elastic airtight case at the end of the stump; positive filler volume, sealing a loose positive by fixing the edge of the airtight cover on an additional using a gum wire, evacuating the bulk positive filler and removing the annular membrane from the impression after the negative is weakened and the impression is removed from it. 12 il.

Description

The invention relates to medicine, namely to prosthetics and prosthesis, and can be used in the manufacture of prosthetic liners for limbs.

The purpose of the invention is to improve the quality of the cast by improving the smoothness of the outline of its contours.

FIG. Figures 1 to 12 illustrate the sequence of the method.

The method is carried out as follows.

On the stump 1, in places of bony protrusions and painful sensations, lining 2 is installed, for example, from foamed polyethylene with a thickness of 1-2 mm, and a thin nylon case 3 is put on the stump on the stump (Fig. 1). Taking into account the volume of the support element installed in the prosthetic sleeve, and the elongation of the receiving sleeve, necessary for its mounting in the prosthesis, in the airtight elastic cover 4, made 0.2-0.3 mm thick on the basis of natural latex, pour loose filler 5 of low density , for example, polyvinyl butyral powder PSh-1. in the amount corresponding to the parameters of elongation of the stump (Fig 2).

A stump 1 (Fig. 3) is placed in an airtight cover 4, which fits them resiliently, and a loose filler 5 ensures its smooth elongation. An elastic annular airtight membrane 6, for example, of rubber based on natural latex 0 in thickness, is put on the stump 1 in its proximal area. , 5-0.6 mm (Fig. 4). The stump 1 in the airtight cover 4 is placed in the flask 7, the space between the air-permeable cover 4 and the inner wall of the flask 7 is filled with bulk material 8, for example sand (Fig 5). Nat gui carried

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the breath-tight membrane 6 on the outer wall of the flask 7, seals the latter and then evacuates the bulk material 8 to form a stump negative (Fig. 6).

In the process of solidification of the bulk material 8, the disabled person loads the stump 1, sits, rises, which makes it possible to reflect in the negative all functional states of the stump 1. After the solid material 8 solidifies (after 3-10 s), the stump 1 in the nylon cover 3 is removed from airtight cover 4 and thus get in Opoka 7 negative, showing the stump 1, elongated to the extent necessary (Fig. 7). An additional vacuum wire 9, made in the form of a perforated metal pipe, covered with an air-permeable sheath, connected through a valve to a vacuum pump (not shown), is placed in the resulting negative. The bulk filler (Fig. 7) is then poured into the negative cavity and the edge of the airtight cover 4 is clamped around the additional vacuum wire 9 with the help of a rubber ring 10, thus sealing the positive 11. Then the vacuum suction is turned on and the solid is cured a filler 5 surrounding the additional vacuum wire 9, i.e., a positive 11 is obtained (FIG. 8). After that, the suction of air from the flask 7 is stopped, the flask 7 is depressurized, the bulk material 8 of the negative goes into a loose state and positive 11 stump of the limb on the additional vacuum wire 9 is removed from the flask 7 (Fig. 9), the annular airtight membrane 6 is removed (FIG. 10), is fixed on the table 12 (Fig. 11) and the receiving sleeve 13 of the prosthesis is made on it. For this, a anti-adhesive release cover (not shown) is put on the positive 11 and alternately tensioning 5-10 (depending on the weight of the disabled) knitted tubes impregnated with a reactive polymer binder, for example polyurethane. After polymerization of the binder (after 25-30 minutes), the vacuum suction is turned off, positive 11 is depressurized, loose filler 5 is poured out (Fig. 12), anti-adhesive and air-tight 4

the covers are removed from the receptacle 13 for reuse. After registration of the landing ring, the receiving sleeve 13 is mounted on the prosthesis.

The described method, due to the ability of the loose filler 5 of low density polymer powder to fill all the irregularities of the complex relief of the butt of the stump 1, allows to improve the quality of the cast by smoothly lengthening the receiving sleeve 13 and, thereby, reducing its traumatic effect on the stump 1. Ensuring a smooth transition from The stump 1 and the imitation of its lengthening allow to exclude the alignment and refinement of the surface of the receiving sleeve 13 and, consequently, to shorten its production time.

The use of an elastic annular airtight membrane 6 allows separate sealing of the negative and positive 11 without the use of adhesive materials, which reduces the time, simplifies the process of making stump casts and, in addition, allows reuse of sealing and shaping elements, the quality of positive 11 while increases, which, in turn, improves the quality of the sleeves of 13 prostheses.

Claims (1)

Invention Formula The method of making stump casts, which consists in lengthening the stump, forming a negative from the bulk material on it by sealing and evacuating the latter, forming a negative impression from the bulk filler placed in an airtight case, in order to improve the quality of the impression by improving smoothness of the outline of its contours, in it to lengthen the stump in the airtight cover pour loose bulk filler in a quantity corresponding to the parameters of elongation, p After that, the airtight cover is put on the stump, and the impression is obtained by additional filling of a loose filler into the airtight cover. 9 1Pf Ј 2Pf 1 gpf 5 GLF  gpf l tf J C8ZZ / S1 FIG, Yu f 7 w / -. Svd 7Shch (rig. 11 13 - FIG. 12