RU2098212C1 - Method of making atraumatic needles - Google Patents

Abstract

FIELD: surgery, namely, production of atraumatic needles. SUBSTANCE: method comprises steps of winding tubular blank onto mandrel, cutting blank at one side in plane parallel relative to plane being tangent to inner circle of wound turns, cutting the whole blank in parallel with mandrel axis at diametrically opposite side. EFFECT: enhanced efficiency. 2 dwg

Description

 The invention relates to methods for the manufacture of needles, for example, surgical, atraumatic, saddlery and others.

 In the vast majority of surgical operations, suture material, which is the connection of a thread with a needle, is used to connect damaged body tissues. The atraumatic metal needle connects to the thread firmly and is used once.

 The need for suture material is very high and amounts to over a hundred million pieces per year for Russia.

 In this regard, in the manufacture of needles, the manufacturing method is of great importance, allowing them to be manufactured with little time and labor.

Known needle and method of forming its sections with recesses obtained by processing with laser or electron beams [1]
The disadvantages of such processing for obtaining a needle include the complexity of processing each individual needle and the high cost of time and labor for processing one needle.

A known method of manufacturing a surgical needle with a diameter equal to the diameter of the surgical thread, considered as a prototype, is that a hole with a diameter smaller than the diameter of the thread is drilled in the rear end part of the workpiece. The hole is expanded with a rod to the diameter of the thread, the end of which is inserted into the hole. The expanded part of the needle is compressed to the diameter of the thread [1]
The considered method provides for the manufacture of each needle individually, which is unacceptable in the conditions of mass production, since it will require a lot of labor and time.

 The problem solved by the invention, increasing productivity and reducing the complexity in the manufacture of needles and improving the accuracy of their geometry.

 This goal is achieved using the method of manufacturing atraumatic needles while processing them in a batch.

 Needles are made according to the proposed method from a tube stock, which is produced in a known manner. The tube channel serves to secure the suture in it.

 The proposed method is illustrated in figure 1.2.

 The blank 1 is wound onto a cylindrical mandrel 2, the linings 3 are pressed against the tube stock with bolts 4 with nuts 5, part of the workpiece material 7 is removed (Fig. 2), for example, by placing the entire assembly mandrel, wound blank and linings with coupling bolts and nuts on the milling or a grinding machine, thereby separating the workpiece along the entire length of its wound part and forming sharp edges 6, on the diametrically opposite side of the workpiece section in it along the length of the mandrel, remove the other part of the workpiece 9, dividing it into separate needles 8 located on straightening, and are removed laths needle is placed into the container, then the thread is inserted into the axial hole of the needle and crimped.

 In this way, a large batch of needles is produced at the same time, the number of which is a multiple of the number of turns of the workpiece on the mandrel.

Claims (1)

 A method of manufacturing atraumatic needles, including inserting the thread into the axial hole of the needle itself, crimping the end end of the needle itself to secure the thread, characterized in that a pipe is used as a blank for the needle itself, which is wound on the mandrel before inserting the thread, cutting the workpiece from one side to plane parallel to the tangent plane to the inner circles of its turns and from the diametrically opposite side make a cut of the entire workpiece parallel to the axis of the mandrel.

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