Vascular surgery roll
This is a continuation of application Ser. No. 343,864 filed Jan. 29, 1982, now abandoned. 
    
    
     BACKGROUND OF THE INVENTION 
     Oftentimes a surgeon is required to open a blood conduit, such as a vein or artery, for the purpose of removing plaque or for repairing a damaged blood conduit. Sometimes a slit is made longitudinally and sometimes it is a cross-cut, while at other times it may be a damaged conduit, such as might occur during an accident. In any event, it is difficult at times to sew the blood conduit back together again. This invention is of a vascular surgery roll which may be positioned within the conduit at the zone which is to be sewn together and, after it is sewn together, it is removed by pulling it through a slight opening in the vein or artery so that it unwinds gradually, the pigtail being outside of the vein or artery once it is sewn up, as is explained more fully hereinafter. 
    
    
     DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a perspective view of a vascular surgery roll in a first embodiment; 
     FIG. 2 is an alternative embodiment of the roll shown in FIG. 1; 
     FIG. 3 is a view in detail illustrating the positionment of the roll in a section of a vein or artery that has been isolated by clamp means; 
     FIG. 4 is a view similar to FIG. 3 and illustrates the vein or artery partially closed; 
     FIG. 5 is a view similar to FIGS. 3 and 4 with the difference that there is illustrated a blood conduit which is in abutting engagement with one another and is to be circumferentially sewn together about the roll. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Referring to the drawings wherein like reference characters designate like or corresponding parts throughout the several views and referring particularly to FIG. 1, the numeral 12 designates the roll which has an outside surface 14, a first end 16, a second end 18, and is composed of windings wherein the convolutions, such as that designated by the numeral 20 are not strictly circumferential but somewhat elliptical in that they extend in a slantwise direction rather than completely around the device. The roll also has a hole 17 in the end face which extends through it and a small hole 19 from which a pigtail 22 extends. The device shown in FIG. 2 is quite similar to that shown in FIG. 1 with the exception that the ends are tapered so that there is provided a flat zone 39 and tapered end zones 41 and 43 which converge to the ends 16&#39; and 18&#39;. The other portions of FIG. 2 which correspond to FIG. 1 are designated with numerals corresponding to those in FIG. 1 with the prime designation applied and are not here further described in order to shorten this application. 
     Referring to FIG. 3, the roll is used as follows: 
     Once the vein or artery has been isolated as by the clamps 34 and 36, an opening 28 with side edges 30 and 32 is to be sewn together. In order to do this the roll 12 is inserted into the isolated section with the pigtail 22 extending from the opening. Thereafter, it is sewn together as indicated by the numeral 38 with the pigtail extending through the slit opening. Thereafter, the pigtail is withdrawn as the roll unwinds to the point where it no longer exists. 
     In FIG. 5, the ends 28&#39; and 30&#39; are of a vein or artery 26&#39; and the roll 8 is inserted and the pigtail 22 extends through the opening between the abutting ends so that when it is sewn together as indicated by the numeral 38&#39;, the pigtail may be utilized to withdraw the wound line removing the roll entirely. 
     It will be seen that this provides a plug at the site where the vein or artery is to be sewn together which greatly facilitates the ability of the surgeon to perform the stitching operations. There is no rejection problem of the foreign article within the body because it is completely removed. 
     Each convolution in a preferred embodiment is a monofilament or it may be a twisted group of fine filaments defining a strand of filaments and for purposes of this description the same may be regarded as a strand in either embodiment. 
     While the instant invention has been shown and described herein in what is conceived to be the most practical and preferred embodiment, it is recognized that departures may be made therefrom within the scope of the invention, which is therefore not to be limited to the details disclosed herein but is to be accorded the full scope of the claims so as to embrace any and all equivalent apparatus and articles.