US2123890A - Surgical clasp - Google Patents

Description

July 19, 1938. GCSSRAU 2,123,890 T SURGICAL CLASP Filed NOV. 28, 1956 lnvemor Q ofTHA/eb Gan-HA0.

By Afforney i Patented July 19, 193

PATEN'E OFFE SURGIIGAL CLASP Gotthard Gossrau, Bitterfeld, Germany, assignor,

by mesne assignments, to Magnesium Development Corporation, a corporation of Delaware Application November 28, 1936, Serial No. 113,170

Germany June 3, 1933 2 Claims. (Cl. 128-325) I The present invention relates to improvements in surgical clasps.

For surgical purposes, for example for the underbinding and tying of veins, etc. metal 5 clasps made from silver, German silver, and

aluminium-alloys are frequently employed. Magnesium metal which, in contradistinction to the aforesaid metals or alloys, is resorbed' by the human or animal body without any difiiculty, and which therefore would appear to be an unsurpassable clasp material for these purposes, has, however, up-to-date not been employed to any great extent, the reason being that the production of clasps having a sumcient strength and rigidity when applied to the body requires the employment of magnesium in the form of wire or ribbon of such a thickness that a bending of the material in the cold is impossible.

One of the objects of the present invention consists in devising a form of clasp for surgical purposes which enables the use ofmagnesium ribbon or tape of. a thinness which will allow of a bending of the unfolded clasp without any risk of its breaking. The necessary rigidity of the clasp, the material of which would be too weak in itself, is, according to the present invention, achieved by a suitable shaping operation which takes placeonly after the ribbon or tape forming the clasp has been applied to the vein to be tied. According to the preferred embodiment of the present invention such suitable shaping is brought about by indenting or bending the folded clasp along a linein parallel with the longitudinal extension of. the clasp with the aid of a suitable tool.

E In the annexed drawing, Figures 1a, 1b and 1c are representative of the various stages of applying the clasp according to the present invention to the body, whilst Figure 2 is a frontal 420 view of a pair of tongs to be employed in adjusting and bending the clasp, and Figure 2a a view of one of the jaws of the tongs in a position at right angles to that shown in Figure 2.

According to a preferred embodiment of the Q5 invention, a strip of magnesium sheet of 0.05 mm. thickness, being 15 mms. long and 5 mms. wide, is bent in U-shape fashion according to Figure 1a, the middle section being 7 mms. long and the two sides being 2 mms. and 6 mms. long, respectively.

The middle section i thus formed is then, with the aid of the tongs, brought into position around the vein 2 to be tied, and by closing the tongs first brought into the shape according to Figure and thus securely prevents the clasp from re- 10 opening by itself.

In adjusting the clasp, there is preferably made use of the tool according to Figures 2 and 2a. This tool consists of a pair of tongs of the usual surgical form, of which the jaws i and 5 are 15 suitably shaped to receive the unfolded clasp and to produce the longitudinal bend in the clasp after folding. To this end, one of the jaws is provided with a chamfer or furrow t corresponding in cross-section to the cross-section of the clasp in its final form, whilst the other law is provided with a ridge 5 adapted to register with the chamfer or furrow 4. In order to retain the unfolded clasp in its position, a metal frame 6 is attached to the first-named jaw which sur- 25 rounds the chamfer or furrow d.

In using the tongs, the strip of magnesium bent according to Figure 1a is inserted in the trough formed by the frame 6 and then folded around the vein to be tied in the usual manner, 30 the jaws of. the tongs, on closing, first compressing the strip into the form shown in Figure 1?). On the further exercise of pressure the bend 3 as shown in Figure .1c, is formed in the clasp by chamfer or furrow l registering with ridge 5 so 35 that finally the clasp tied around the vein assumes the form shown in Figure 1c. The clasp is then securely fastened and effectively prevented from re-opening.

I claim: 40

1. A surgical clasp consisting of a folded piece" of. ribbon or tape of magnesium metal being bent along a line in parallel with its longitudinal axis.

2. A surgical clasp consisting of a folded piece of ribbon or tape of magnesium metal so as to form a base and two sides overlapping each other,

' such folded piece being bent along a line in parallel with its longitudinal

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