FR2758075A1 - FLEXIBLE SPLINED BUTTONED END - Google Patents

Abstract

The device comprises a pin having on one side a fluted end (3) suitable for receiving a protective cap (4) and on the other a buttoned and crutched end (2) making it possible to treat bone fractures with maximum safety. lengths of the child and the adult.

Description

Device for treating fractures of long bones nar flexible fluted pin with buttoned end.

 The invention relates to pins used in current practice in orthopedic and trauma surgery for the synthesis of long bones.

 The pins usually used in orthopedic and trauma surgery have 2 sharp ends to perforate the hard bone cortices. The use of such pins is not however without danger in the event of a false route, particularly for the soft parts of the neighborhood which are particularly fragile: artery, nerve, and also growth cartilage in children. In case of intra-canal pinning, the pin is mounted in the medullary canal until it is fixed to the contact see in the growth cartilage which can be traumatized by the aggressive end of the pin, which can cause growth problems thereafter.

 Currently, there are pins whose ends are sharp, pointed or sharp, therefore aggressive1.ve. In addition, the pins once cut to the desired length have another end which remains potentially aggressive for the skin or the neighboring organs, a source of pain or infections.

 The invention has set itself the aim of remedying these drawbacks of potential aggressiveness of the 2 ends of pins introduced into the medullary canal for the treatment of bone fractures along adults and children in a simple, safe manner. , efficient and rational.

The problem which the invention proposes to solve is: - to ensure good stability of the fracture site, - to make the two ends of the pin used and introduced into the medullary canal non-aggressive. To solve such a problem, the spindle has on one side a buttoned and crutched end which will allow after perforation of the external cortex by a square point to mount using a mandrel the flexible pin buttoned in the medullary canal. Its buttoned and advantageously crutched end will allow it, even in the absence of perfect alignment of the fracture site, to more easily catheterize the other fracture fragment. In addition, its buttoned end, in the event of a false route and therefore an unfortunate exit from the medullary canal, makes the spindle non-aggressive for the surrounding tissues: artery, nerve, muscle that it spares. Finally when the focal point of the fracture has passed, the spindle is gradually mounted until it plugs into the opposite metaphysis of the long bone in contact with the growth cartilage in children. The buttoned end of the flexible pin again helps save the fragile growth cartilage.

 When the positioning of the spindle is satisfactory, it is cut to the appropriate length: The other end of the extra-cortical spindle is generally located just under the skin then risking puncturing it later and in particular during insertion. load which creates compression and often a retreat of the osteosynthesis material. The use of a grooved pin at one end (patent N "9607911 of 20/06/96) will make it possible to remedy this drawback by placing a protective expansion cap on its swollen end.

 Under these conditions, we understand that the potential aggressiveness of the spindle is neutralized at its 2 ends - on one side by a buttoned and crutched end, - on the other, after sectioning to the desired length, by application to its end fluted with a protective cap.

 This type of improvement concerns all the diameters of flexible pins used for the intra-canal synthesis of long bones in adults and children, whatever their length, diameter or material used: stainless steel, titanium or any other bio-compatible material.

 The invention is set out below in more detail with appended drawings in which: - Figure 1 is a longitudinal view of the flexible fluted spindle with buttoned end, - Figure 2 shows an example of use for a transverse fracture of the 2 leg bones in children.

 As shown in Figure I this pin has on one side a grooved end (3) on which can be fixed a protective cap (4) and on the other side a buttoned end and advantageously crutched (2) allowing to pass the hearth fracture with ease and atraumatically.

 The advantages clearly emerge from the description, in particular it emphasizes and insists on: - job security thanks to its non-aggressive buttoned end in the event of a false route, neither for growth cartilage in children, nor for soft parts.

- the crutched shape of its end will facilitate the passage of the fracture site even if not perfectly reduced.

- the protection provided by the adapted protective cap on the grooved part makes the other end of the sectioned spindle non-aggressive for the skin (reducing the risk of pain, skin perforation, infection and attack on neighboring tissues) .

- In addition, the flexible spindle at its part I is of constant diameter.

Claims (5)

-1- Device for treating fractures of long bones in adults and children, characterized in that it comprises a flexible pin of constant diameter and not aggressive at its two ends. -2- Device according to claim 1 characterized in that the element 1 is a pin whose one end is advantageously buttoned and crutched. -3- Device according to claim 1 characterized in that the element 1 is a pin whose other end is grooved clean to receive after section to the desired length a protective expansion cap. -4- Device according to claim 1 characterized in that the element 1 is a spindle of length and variable diameter depending on the size of the bone to be treated. -5- Device according to claim I characterized in that the element 1 is a pin made of titanium, stainless steel or any other biocompatible material.