JP2002325775A - Cloth for endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide cloth for an endoscope which prevents easy dislodging of a marker thread piece. SOLUTION: This cloth 10 for the endoscope is formed by fusing the marker thread 12 to a front surface of the laminated cloth 11 laminated with a nonwoven fabric on at least one surface of gauze. The marker thread 12 is formed by winding a polyester filament 16 around a polypropylene multifilament 15 containing 59 w/w% barium sulfate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope fabric used exclusively in endoscopic surgery.

[0002]

2. Description of the Related Art In a surgical operation, a large number of gauze is used for the purpose of preventing drying and wiping bleeding. If such gauze remains in the body, various problems may occur, such as pain, discomfort, or slight fever. Therefore, it is necessary to remove all gauze from the body at the end of the operation.

[0003] Therefore, in surgery, a gauze in which a resin yarn (which may be hereinafter referred to as a marker yarn) which is non-transparent to X-rays is generally used instead of one warp constituting the gauze. X before closing the surgical site
A method has been adopted in which radiography (radiography) is performed to check for the presence or absence of gauze using the marker thread as a clue, and to remove any remaining gauze. Multifilaments obtained by kneading barium sulfate in a polypropylene resin, or filaments of a vinyl chloride resin or silicon resin kneaded with barium sulfate are exclusively used as the above-mentioned X-ray-impermeable resin thread.

[0004] Although the marker yarn is attached in this manner, there is a problem that the yarn at the cut end is unraveled because the gauze itself is a coarsely woven fabric, and the unraveled yarn remains in the body. Therefore, in the related art, the weaving density near the cut end has been increased or the edge is prevented from being unraveled, and the gauze has recently been proposed in which a nonwoven fabric is laminated on both sides. In the case of this nonwoven fabric laminated gauze, the gauze is prevented from being unraveled by the nonwoven fabric, and the strength of the nonwoven fabric alone becomes insufficient, but the nonwoven fabric has an excellent property that sufficient strength can be secured by the gauze in the intermediate layer. Although a thick nonwoven fabric shows sufficient strength, it is not suitable for use in surgery because of poor flexibility.

[0005] In attaching the marker yarn to the nonwoven fabric laminated gauze, the method of exclusively placing the marker yarn on the gauze and sandwiching it between the nonwoven fabrics when laminating the nonwoven fabric on the intermediate layer gauze is exclusively adopted. Have been.

[0006] Conventionally, surgery is usually performed by performing laparotomy, thoracotomy, or the like. In recent years, endoscopic surgery has been actively performed. With the endoscopic surgery, several small holes of about 5 to 10 mm are made in the abdomen and the like,
This is a surgical operation performed by inserting an elongated camera or surgical tool through the hole, and the pain is small because the scar is small, and the postoperative recovery is quick and the method is less burdensome for the patient.

[0007] In the endoscopic operation, a large number of cloths are used because it is necessary to wipe the bleeding in the abdominal cavity with a cloth such as gauze as in the open surgery. The endoscope fabric must be inserted from a thin tube inserted into the abdomen,
In addition, from the viewpoint of the ease of taking out after insertion, a strip that is longer and narrower than the cloth for normal surgery is required.

Therefore, the above-mentioned nonwoven laminated gauze containing marker yarn is cut into a long and narrow shape and used. (See FIG. 3), since the method is a method in which the marker yarn 22 is cut into a long and thin shape so as to include the marker yarn 22 (FIG. 3B: a front view showing the nonwoven laminated gauze 23 containing the marker yarn for an endoscope). As a nonwoven laminated gauze for an endoscope, the marker yarn 22 was short, and the visibility at the time of X-ray imaging was not satisfactory. When the marker yarn 22 is cut so as to be included over the entire length in the longitudinal direction of the endoscope fabric (FIG. 3 (c): nonwoven fabric laminated gauze 2 containing marker yarn for endoscope)
4 is a wasteful view, which wastes a lot of portions not containing the marker thread and increases the cost.
Also, a method of sandwiching many marker yarns in advance when manufacturing nonwoven laminated gauze is conceivable, but in this case, the manufacturing machine becomes extremely large, so a large manufacturing facility is required, and the manufacturing cost is high. It is not realistic.

Therefore, a method of attaching a marker yarn of a desired length to the surface of the already-formed nonwoven fabric laminated gauze by heat fusion is considered. In this case, since the amount of marker yarn attached can be adjusted regardless of the method of manufacturing the nonwoven fabric laminated gauze, it is possible to attach the marker yarn over the entire length of the strip in the longitudinal direction.

[0010]

As the marker yarn, there is mentioned a yarn obtained by kneading an X-ray opaque substance such as barium sulfate into a thermoplastic resin as described above. Is generally used at about 55 to 65% w / w from the viewpoint of visibility during X-ray imaging. However, when the content of barium sulfate or the like is high, for example, when polypropylene is used as the base resin, the tenacity tends to be lacking.

[0011] Since a cloth used for an endoscope is put in and taken out through a thin tube, a bending force is applied as if rubbing. Therefore, extremely high flexibility and tenacity are required. If a fragile material is used for the marker thread, small pieces may be peeled off by being rubbed and may be left in the body.

The content of barium sulfate or the like is, for example, 50 w /
w% may be used to secure the tenacity, but in this case, a thick marker thread is required from the viewpoint of ensuring visibility, and the percentage of the marker thread in the endoscope fabric is large. Become. Since the marker yarn has poor water absorption, it does not cause much problem in the case of a large surgical cloth, but in the case of a small endoscope cloth which is a small-sized cloth, if the ratio of the marker yarn is large as described above, There is a concern that the original water-absorbing effect of the endoscope fabric may be diminished. Therefore, it is desired to increase the content of barium sulfate and the like.

On the other hand, when vinyl chloride is used for the base material,
Even if 70% w / w of barium sulfate or the like is contained, it is not so brittle and there is not much fear of peeling off. However, if it is burned at the time of disposal, it may cause environmental problems such as generation of dioxin.

Accordingly, the present invention has been made in view of the above problems, and does not use vinyl chloride as a base material, does not significantly impair the water absorption, and has almost no fear of the marker thread pieces coming off. It is an object to provide a fabric for use.

[0015]

According to the present invention, there is provided an endoscope fabric comprising a gauze having a nonwoven fabric laminated on at least one surface thereof, a nonwoven fabric made of a thermoplastic resin yarn. A fused endoscope fabric, wherein the X-ray opaque thermoplastic resin yarn is a polyester filament wrapped around a polypropylene filament containing an X-ray opaque substance. Is the gist.

The polypropylene filament containing the X-ray opaque substance (hereinafter sometimes referred to as a marker main yarn) has an X-ray opaque substance content of 55 w / w% or more, or 70 w / w%. As described above, if the content is 75 w / w% or more, there is a concern that the composition may be somewhat fragile. However, the polyester filament (wrapped yarn) is flexible and tenacious, and has sufficient strength. Since the polyester filament is wound around the marker main yarn, even if the marker main yarn is slightly cracked, the above-described polyester filament (wrapped yarn) has the above-mentioned properties. It is held by the polyester filament and hardly peels off and falls off.

Therefore, a marker yarn having a relatively high X-ray opaque substance content can be used as the marker main yarn, and the marker yarn (X-ray opaque thermoplastic resin yarn) can be made relatively thin. It hardly impairs the absorbency of the entire endoscope fabric.

The marker yarn is fused to the laminated fabric by melting and solidifying the marker main yarn and / or the polyester-based filament.

Further, the polyester filament does not contain an X-ray opaque substance. In addition, what consists only of polyester from a viewpoint of intensity | strength is preferable.

Further, in the present invention, it is preferable that the polypropylene filament containing the radiopaque substance is a multifilament.

A multifilament formed by combining a plurality of thin filaments has better flexibility and toughness than using a thick monofilament as a polypropylene filament containing an X-ray opaque substance. Therefore, it is preferable to use a multifilament as described above. However, the multifilament may be melted into one lump and become equivalent to the monofilament by fusion. However, heating is mainly performed on the contact portion with the above-mentioned laminated fabric, so that the polypropylene filament containing the X-ray non-permeable material is heated. By not applying much heat to the laminated fabric side, it is possible to leave some multifilament state without forming a lump, and it is more effective to use multifilament.

Further, in the method for producing an endoscope fabric according to the present invention, a step of mounting the X-ray non-transparent thermoplastic resin thread on one surface of the laminated fabric; A step of heating from the side to thermally fuse the X-ray opaque thermoplastic resin yarn. In addition, heating may be performed from both one surface and the other surface of the laminated fabric. In this case, it is preferable that the heating temperature be lower on the one side than on the other side.

As described above, by mainly heating and fusing from the other surface side where the X-ray non-transparent thermoplastic resin yarn is not placed, the X-ray of the X-ray non-transparent thermoplastic resin yarn is obtained.
When the non-line-permeable material-containing polypropylene filament is a multifilament, it is possible to prevent the non-laminated fabric side of the multifilament from being melted. Therefore, even after fusion, the non-laminated fabric side can be left as a multifilament, so that it is flexible and has good tenacity.

The heating temperature of the other side is 175 to 175.
250 ° C is preferred, more preferably 200 to 220 ° C
It is.

[0025]

FIG. 1A is a front view showing an endoscope fabric according to one embodiment of the present invention, and FIG. 1B is a BB line shown in FIG. It is sectional drawing.

The endoscope fabric 10 is obtained by fusing a marker yarn (a yarn made of a thermoplastic resin impervious to X-rays) 12 to the front surface (one surface) of a laminated fabric 11. This marker thread 1
2 is a barium sulfate (non-transparent X-ray substance) 59 w / w%
A polyester filament (marker-wound yarn) 16 is wound around a contained polypropylene multifilament (marker main yarn) 15. The laminated fabric 11
Is a nonwoven fabric 14 laminated on both sides of a gauze 13 (FIG. 1B).

When the thin tube of the endoscope is inserted, the endoscope fabric 10 is bent and folded as if rubbed, so that the marker main thread 15 may be cracked. is there. However, even if the marker main thread 15 is somewhat fragile as described above, since the marker main thread 15 is held down by the polyester filament 16, small pieces of the marker main thread 15 hardly fall off.

When a piece of gauze that is not laminated alone is used in place of the laminated cloth 11, it tends to form a small dumpling when blood or the like is absorbed. Since the fabric is a cloth, the size can be maintained to some extent, and the marker yarn 12 is also relatively elongated, so that it is easy to find out at the time of X-ray imaging.

Next, an example of a method for manufacturing the endoscope fabric 10 will be described.

The marker yarn 12 is superimposed on the front side (one side) of the raw fabric of the long laminated fabric 11, at 175 to 250 ° C. from the back side (the other side) and 100 ° from the front side of the laminated fabric 11.
で 250 ° C. to apply the marker yarn 12 to the laminated fabric 11
Is fused. Then, it is cut to a predetermined length.

<Experiment> Various kinds of the endoscope fabrics were manufactured,
An experiment was conducted on the peelability of the marker yarn. As shown in FIG. 2 (schematic diagram showing an example of the method for manufacturing the endoscope fabric according to the present invention), the heater 31 in the form of a roll is used for heating.
Using 32, 33, and 34, fusion was performed by heating twice. The lower side shown in FIG. 2 is the surface side of the laminated fabric 11, and in the figure,
31 is a front-back heater, 32 is a rear-back heater, 33 is a front-front heater, and 34 is a rear-front heater. As the laminated fabric 11, two types, a thick one and a thin one, were used. In Experiments 1 to 29, a polypropylene multifilament in which barium sulfate was kneaded at 59 w / w% was used as a marker yarn and a polyester multifilament was wound. In Experiments 30 to 37, barium sulfate was kneaded in 61 w / w%. A monofilament made of vinyl chloride was used.

The experimental results are shown in Tables 1 to 3. In the table, the peel strength refers to a test of the peelability of the marker yarn.
Is a case where it does not peel off even if rubbed, Δ is a case where it is slightly peeled off when rubbed, and X is a case where it is easily peeled off.

[0033]

[Table 1]

[0034]

[Table 2]

[0035]

[Table 3]

As can be seen from Tables 1 to 3, the barium sulfate-containing polypropylene multifilament / polyester multifilament marker yarns (Experiments 1-2)
9) When the heating temperature on the back side was 180 to 250 ° C., the marker yarn was almost firmly fused, and the fabric was not discolored and was good. Note that the heating temperature may be set in consideration of the transport speed of the cloth.

As described above, the endoscope fabric and the method for producing the same according to the present invention have been specifically described with reference to the drawings showing examples. However, the present invention is not necessarily limited to the illustrated examples. It is also possible to implement the present invention with appropriate modifications within a range that can be adapted to the above-mentioned purpose, and all of them are included in the technical scope of the present invention.

[0038]

The fabric for an endoscope according to the present invention has almost no fear that the marker thread pieces will peel off, so that a thinner marker thread having a relatively high content of an X-ray opaque substance can be used. Therefore, the water absorption of the endoscope fabric is hardly impaired. Also, since vinyl chloride is not used for the marker thread,
There is no problem such as the generation of dioxin during combustion disposal.

[Brief description of the drawings]

FIG. 1A is a front view showing an endoscope fabric according to an embodiment of the present invention, and FIG. 1B is a cross-sectional view taken along the line BB shown in FIG.

FIG. 2 is a schematic view showing an example of a method for producing an endoscope fabric according to the present invention.

3A is a front view showing a large-sized nonwoven laminated gauze containing a marker thread, and FIGS. 3B and 3C show a nonwoven laminated gauze for an endoscope obtained by cutting the nonwoven laminated gauze containing a marker thread shown in FIG. 3A. Front view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Endoscope cloth 11 Laminated cloth 12 Marker thread 13 Gauze 14 Nonwoven fabric 15 Marker main thread 16 Marker wrapping thread 31, 32, 33, 34 Roll heater

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4C061 AA24 BB00 CC00 DD00 GG11 4C081 AA02 AA14 AC16 BB02 BC02 CA021 CA161 CB01 DA05 DC04 DC13 EA04 EA12 4L032 AA05 AB02 AB04 AC01 DA00 EA00

Claims (3)

[Claims] 1. An endoscope fabric in which an X-ray non-transparent thermoplastic resin thread is fused to the surface of a laminated fabric in which a nonwoven fabric is laminated on at least one surface of a gauze, wherein the X-ray An endoscope fabric, wherein the non-permeable thermoplastic resin yarn is formed by winding a polyester-based filament around a polypropylene-based filament containing an X-ray non-permeable material. 2. The endoscope fabric according to claim 1, wherein the polypropylene-based filament containing the X-ray opaque substance is a multifilament. 3. The method for producing an endoscope cloth according to claim 1, wherein the X-ray non-transparent thermoplastic resin thread is placed on one surface of the laminated cloth. And a step of heat-fusing the X-ray non-transparent thermoplastic resin thread by heating from the other side of the laminated fabric, and a process for producing an endoscope fabric.