JP5120732B2 - Medical gauze - Google Patents

Description

  The present invention relates to a medical gauze in which an X-ray contrast yarn is woven.

  Medical gauze absorbs blood, body fluids, etc. when used in a patient's body during surgery, etc., making it difficult to distinguish it from organs and tissues. Is called. In general, since gauze fibers are not shown in an X-ray image, it is difficult to confirm the presence or absence of gauze left in the body after surgery.

Accordingly, various medical gauze has been proposed in which X-ray contrast yarns are woven into gauze and the remaining gauze can be easily confirmed by post-operative X-ray photography.
However, in a medical gauze in which one of a plurality of warps constituting a gauze is simply replaced with an X-ray contrast yarn, the X-ray contrast yarn generally has a larger diameter than the gauze component yarn, and the surface is smooth. Because it is formed, if it is picked with tweezers, it may fall off from the gauze.

  Therefore, for example, Patent Document 1 and Patent Document 2 describe medical gauze in which an X-ray contrast yarn is prevented from coming off. Specifically, in the medical gauze described in Patent Document 1, among the constituent yarns in a direction substantially parallel to the X-ray contrast yarn, a plurality of warps adjacent to both sides of the X-ray contrast yarn are in contact with each other, And it is closely woven so as to come into contact with the X-ray contrast yarn. Further, the gauze described in Patent Document 2 densely weaves the warp group of the ear near the folded end of the weft, and the X-ray contrast yarn is mixed as the warp in the close-weaved warp group of the ear. As described above, in Patent Documents 1 and 2, the X-ray contrast yarn is prevented from coming off by increasing the frictional force by sandwiching the X-ray contrast yarn from both sides with tightly folded warps. Yes.

Japanese Patent No. 3648727 JP 2007-330425 A

  As described above, medical gauze woven with X-ray contrast yarns is required not to easily fall out, and can be manufactured inexpensively with a simple structure without impairing flexibility and good touch. Is desired.

  The present invention has been made in view of such points, and an object of the present invention is to provide a medical gauze having a simple structure, in which an X-ray contrast yarn is not easily removed from the gauze, has a good feel, and is inexpensive.

The medical gauze of the present invention is a medical gauze in which a plurality of warps and wefts arranged at intervals and intersecting each other are used as constituent yarns, and at least one warp yarn is woven with an X-ray contrast yarn,
A warp densely woven portion densely woven so that adjacent ones of the plurality of warps come into contact with each other is provided at the ear portion where the weft is folded, and the X-ray contrast yarn has one side of the warp dense The warp yarns arranged so as to be in contact with a woven portion and adjacent to the other side of the X-ray contrast yarn are not densely woven.

  According to the present invention, it is possible to provide a medical gauze having a simple structure, in which an X-ray contrast yarn is difficult to be removed from a gauze, has a good feel, and is inexpensive.

1 is an overall view of a medical gauze according to a first embodiment of the present invention. It is a figure which expands and shows the principal part of the medical gauze shown in FIG. It is sectional drawing along the AA line of the medical gauze shown in FIG. It is explanatory drawing which shows the cross section shown in FIG. 3 typically. It is a figure which shows the medical gauze before cutting for demonstrating the manufacturing process of the medical gauze shown in FIG. It is an enlarged view of the principal part of the medical gauze of the 2nd Embodiment of this invention. It is explanatory drawing which shows typically the cross section along the BB line of the medical gauze shown in FIG. It is a figure which shows the sample and test result in the 1st test of the drawing strength of a X-ray contrast yarn. It is a figure which shows the sample and test result in the 2nd test of the drawing strength of a X-ray contrast yarn. It is a figure which shows the sample and test result in the 3rd test of the drawing strength of a X-ray contrast yarn. It is a figure which shows the sample and test result in the 4th test of the drawing strength of a X-ray contrast yarn. It is a figure which shows the sample and test result in the 1st comparative test of the drawing strength of a X-ray contrast yarn. It is a figure which shows the sample and test result in the 2nd comparative test of the drawing strength of a X-ray contrast yarn.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

<First Embodiment>
The medical gauze 1 according to the first embodiment of the present invention is used for, for example, a medical practice such as surgery, and can be used to absorb body fluid, blood, and the like.
As shown in FIGS. 1 to 4, the medical gauze 1 includes a plurality of warps 2, a plurality of wefts 3, and an X-ray contrast yarn 4. Specifically, the medical gauze 1 is composed of a plurality of warp yarns 2 and a plurality of weft yarns 3 substantially orthogonal to the plurality of warp yarns 2 as plain yarns so that they intersect alternately at substantially equal intervals. is there.

  In the present embodiment, the warp yarn 2 and the weft yarn 3 employ cotton yarn having a thickness of 40th as an example, but yarn of any thickness may be used. Further, the warp yarn 2 and the weft yarn 3 are not limited to cotton yarn, and may be any material such as cellulose fiber, synthetic fiber, or a mixture thereof.

As a material of the X-ray contrast yarn 4, for example, a synthetic resin containing an X-ray non-transparent substance such as barium sulfate can be employed. As the synthetic resin, for example, a silicon-based resin, a polyvinyl chloride resin, a polypropylene resin, a polyester resin, a polyethylene resin, or the like can be used.
Further, the outer diameter of the X-ray contrast yarn 4 is larger than that of the warp yarn 2 and the weft yarn 3. In this embodiment, as an example, the one having a diameter of about 0.476 mm or 0.76 mm is used. Can be determined as appropriate.

  The medical gauze 1 is provided with a plain weave portion 5 that is plain woven so that the warp yarn 2 and the weft yarn 3 are substantially equidistant at the center, and the weft yarns 3 at the ends on both sides (right and left sides in FIG. 1) of the plain weave portion 5. The warp densely woven portion 6 in which the warp yarn 2 is woven more densely than the plain weave portion 5 is provided in the ear portions 8 and 8 that are folded back. Further, a weft densely woven portion 7 in which the weft 3 is woven more densely than the plain weave portion 5 is provided on both ends of the warp 2 (upper and lower sides in FIG. 1).

  The plain weave portion 5 is plain woven so that the warp yarn 2 and the weft yarn 3 intersect with each other alternately at a substantially constant interval. The interval between the warp 2 and the weft 3 is arbitrary and can be determined as appropriate. In this embodiment, the warp 2 and the weft 3 are set so that 30 warps 2 and wefts 3 are arranged per inch (2.54 cm). (Number of inches (longitudinal × longitude) = 30 × 30).

  On the other hand, the warp densely woven portion 6 is formed in a predetermined width by closely weaving a plurality of warp yarns 2 so that adjacent warp yarns 2 are in contact with each other. In addition, the warp densely woven portion 6 is composed of eight warps 2 in the illustrated example, and these warps 2 intersect with the wefts 3 alternately up and down every two (see FIG. 2). The number of warps 2 and the form of intersection with the wefts 3 may be changed as appropriate.

  Two X-ray contrast yarns 4 are woven. Specifically, one X-ray contrast yarn 4 is arranged between a central plain weave portion 5 and warp densely weave portions 6 on both sides thereof. The X-ray contrast yarn 4 is arranged so that one side is in contact with the warp densely woven portion 6, and the warp 2 of the plain weave portion 5 adjacent to the other side of the X-ray contrast yarn 4 is not densely woven.

  In the weft densely woven portion 7, a plurality of wefts 3 are densely woven at a narrower interval than the plain weave portion 5, and the weft 3 is not woven on the outer side (an intercostal space 9). 2 is extended by an appropriate length, which makes it difficult to unravel the weft 3.

  For example, as shown in FIG. 5, the medical gauze 1 having the above-described configuration is provided for a plurality of warp yarns 2 arranged at predetermined intervals so as to form a central plain weave portion 5 and warp densely weave portions 6 on both sides thereof. One weft 3 is woven at predetermined intervals while turning back at the ears 8 at both ends of the plurality of warps 2, and sequentially, the intercostal space 9, the weft densely woven portion 7, the plain weave portion 5, the weft densely woven portion 7, It can be manufactured by forming the gaps 9,... Continuously and cutting them at the gaps 9.

Next, the function and effect of the medical gauze 1 configured as described above will be described.
When used in the body of a patient in surgery or the like, the remaining gauze 1 can be easily confirmed by performing X-ray imaging after the operation, and the X-ray contrast thread 4 displayed on the X-ray image. . At this time, since two X-ray contrast yarns 4 are woven into the medical gauze 1, the visibility on the X-ray image is excellent.

  Further, when the X-ray contrast yarn 4 is pulled in the longitudinal direction, the frictional force with the weft 3 intersecting this and the frictional force with the adjacent warp 2 become resistance. At this time, the X-ray contrast yarn 4 is woven so as to be in contact with and adjacent to the warp densely woven portion 6 in which a plurality of warps 2 are closely woven so that adjacent warps 2 are in contact with each other. When the weft 3 intersecting with the X-ray contrast yarn 4 is dragged, it is pulled toward the ear portion 8 by the dragged and inclined weft 3 and is pressed against the warp densely woven portion 6. The end of the warp densely woven portion 6 is reliably supported by the ear portion 8 where the weft 3 is folded back, and the movement of the X-ray contrast yarn 4 toward the ear portion 8 is suppressed by the closely woven warp 2. The X-ray contrast yarn 4 is strongly pressed against the warp yarn 2 and the frictional force increases, so that the X-ray contrast yarn 4 is difficult to come off.

  In general, the X-ray contrast yarn 4 is thicker and harder than the gauze constituent yarn, so that if it is disposed at the end of the gauze, the gauze feel will be impaired, but the medical gauze of the present embodiment. In 1, the X-ray contrast yarn 4 is disposed adjacent to the inside of the warp densely woven portion 6, so that the touch is good. In the medical gauze 1, the X-ray contrast yarn 4 is adjacent to the warp densely woven portion 6 only on one side and adjacent to the plain weave portion 5 on the other side. What is necessary is just to form, and compared with the thing of the above-mentioned patent documents 1 and 2, a densely woven part can be decreased and it is economical.

  In addition, when the number of the warp yarns 2 of the warp densely woven portion 6 is large and the X-ray contrast yarn 4 is separated from the ear portion 8, the pull-out strength of the X-ray contrast yarn 4 tends to be low (see test results described later). . Further, when the number of the warp yarns 2 of the warp densely woven portion 6 is small and the X-ray contrast yarn 4 is close to the ear portion 8, the touch tends to deteriorate. Therefore, the number of the warp yarns 2 of the warp densely woven portion 6 is determined in consideration of the pullout strength and the feel.

<Second Embodiment>
Next, a second embodiment of the present invention will be described with reference to FIGS. Note that the same reference numerals are used for the same parts with respect to the first embodiment, and only different parts will be described in detail.

  In the medical gauze 1 according to the present embodiment, an X-ray contrast yarn 4A having a large diameter by twisting a plurality of (two in the drawing) X-ray contrast yarns is used as the X-ray contrast yarn.

  As shown in FIG. 6, the X-ray contrast yarn 4 </ b> A is a twisted yarn, so that an uneven portion 11 is formed on the outer peripheral surface, and a plurality of wefts 3 are engaged with the uneven portion 11. As a result, the X-ray contrast yarn 4A is more difficult to come off due to the engagement force with the weft 3 in addition to the frictional force between the warp 2 and the weft 3. Here, by setting the interval between the concave and convex portions 11 to be substantially equal to the interval between the wefts 3 or an integral multiple thereof, the engagement with the wefts 3 is facilitated, and the difficulty of pulling out the X-ray contrast yarns 4A (drawing strength) is reduced. Can be effectively increased. Further, since the X-ray contrast yarn 4A has a large diameter, visibility on the X-ray image can be improved.

  In the second embodiment, when the two X-ray contrast threads 4a and 4b are twisted to form the X-ray contrast thread 4A, it is difficult to maintain the twisted shape due to the elasticity of the X-ray contrast threads 4a and 4b. The twisted shape can be easily maintained by bringing the three warps 2 to which one warp 2 is added together. In this case, the warp 2 is sufficiently thin as compared with the X-ray contrast yarns 4a and 4b, and therefore hardly affects the twisted shape.

  In the first and second embodiments, the warp densely woven portion 6 and the X-ray contrast yarns 4 and 4A are provided on both sides of the plain weave portion 5, but may be provided only on one side. It is sufficient that at least one 4, 4A is provided. Further, the weft densely woven portion 7 may be omitted.

  Moreover, in the said 1st and 2nd embodiment, although the medical gauze 1 has shown what was plain-woven as an example, it is not restricted to this form, For example, various arbitrary weaves, such as a twill weave and a satin weave, are shown. A form may be adopted. Moreover, although the said medical gauze 1 is formed in the rectangular shape, arbitrary shapes may be sufficient.

Hereinafter, the test results of the pullout strength test of the X-ray contrast yarns 4 and 4A for the medical gauze 1 according to the first and second embodiments will be described with reference to FIGS. 8 to 13. This test is performed by fixing the medical gauze 1 as a sample, pulling out the X-ray contrast yarns 4 and 4A, and measuring the load (pulling strength) required at the time of pulling out.
The medical gauze 1 used in this test is a square with a side of 30.0 cm ± 0.5 cm (allowable range), warp / weft = 40 s / 40 s (40th), actually measured number of inches (warp × weft) = 30 × 30 (the number of inch driving (longitudinal × longitude) = 28 × 28).
As the X-ray contrast yarns 4 and 4A, two types of X-ray contrast yarn B and X-ray contrast yarn C are appropriately used. The X-ray contrast yarn B is a fixing material: polypropylene or the like, a contrast agent: barium sulfate. , Color: Blue, Shape: Multifilament shape consisting of about 60, Outer diameter: Average 0.476 mm, X-ray contrast yarn C is fixing material: Polypropylene etc., Contrast agent: Barium sulfate, Color: Green, Shape : Single filament shape, outer diameter: 0.76 ± 0.076 mm.

<First test>
In the first test, as shown in FIG. 8A, in the medical gauze 1 of the first embodiment, the X-ray contrast yarn B is woven with 8 warp yarns 2 of the warp densely woven portion 6. The pull-out strength was measured for the thing. The result is shown in FIG. As shown in FIG. 8B, the test was performed twice for 10 samples A1 to A10. As a result, the first average value was 686.2 cN, and the second average value was 628.2 cN.

<Second test>
In the second test, as shown in FIG. 9A, in the medical gauze 1 of the first embodiment, four warps 2 of the warp densely woven portion 6 are used, and the X-ray contrast yarn B or C is used. The pull-out strength was measured for the woven material. The results are shown in FIGS. 9 (b) and 9 (c). As shown in FIG. 9B, as a result of performing the test twice for 10 samples B1 to B10 in which the X-ray contrast yarn B is woven, the first average value is 961.6 cN and the second average value. Was 916.5 cN.
Moreover, as shown in FIG.9 (c), as a result of performing the test twice about five samples of C1-C5 which woven the X-ray contrast yarn C, the average value of the first time is 130.2 cN, The average value was 127.8 cN.
In the samples C1 to C5 in which the X-ray contrast yarn C is woven, the X-ray contrast yarn C has flexibility and could not be pulled out beyond the stroke of the testing machine by extending during the test. The load measured during elongation was taken as the measurement result.

<Third test>
In the third test, as shown in FIG. 10 (a), in the medical gauze 1 of the second embodiment, eight warp yarns 2 of the warp densely woven portion 6 are used and two X-ray contrast yarns B are used. The pull-out strength was measured with respect to the X-ray contrast yarn 4A woven together. The test results are shown in FIG. As shown in FIG.10 (b), as a result of testing once about ten samples of D1-D10, the average value was 805.0 cN.

<Fourth test>
In the fourth test, as shown in FIG. 11A, in the medical gauze 1 of the second embodiment, four warps 2 of the warp densely woven portion 6 are used and two X-ray contrast yarns B are used. Alternatively, the pulling strength was measured with respect to the one woven with the X-ray contrast yarn 4A twisted with C. The results are shown in FIGS. 11 (b) and 11 (c). As shown in FIG. 11B, the test was performed once for five samples E1 to E5 in which the X-ray contrast yarn B was woven, and as a result, the average value was 212.4 cN.
Moreover, as shown in FIG.11 (c), as a result of conducting a test once about five samples of F1-F5 which woven X-ray contrast yarn C, the average value was 1233.6cN.

  As a comparison with the first and second embodiments described above, the results of a pull-out test similar to the first to fourth tests for the following two forms of medical gauze will be described.

<First comparative test>
In the first comparative test, as shown in FIG. 12A, in the medical gauze similar to that used in the first to fourth tests, the warp densely woven portion 6 is not provided, and the plain weave portion 5 is provided. The pulling strength was measured for an X-ray contrast yarn 4A obtained by twisting two X-ray contrast yarns B into a warp yarn 2.
The test result is shown in FIG. As shown in FIG.12 (b), as a result of testing once about five samples of G1-G5, the average value was 505.4 cN.

<Second comparative test>
In the second comparative test, as shown in FIG. 13A, in the same medical gauze as used in the first to fourth tests, the warp densely woven portion 6 is not provided, and the above-mentioned Patent Document 1 is used. The X-ray contrast yarn 4 is woven into the plain weave portion 5 as the warp yarn 2, and the six warp yarns 2 on both sides of the plain weave portion 5 are closely woven so that they are in contact with each other, A pullout strength test was performed on the one which was brought into contact with the line contrast yarn 4.
The test results are shown in FIG. As shown in FIG.13 (b), as a result of testing once about ten samples of H1-H10, the average value was 575.1 cN.

From the above test results, the following can be understood.
The pull-out strength of the X-ray contrast yarn 4 is that of the fourth test (FIG. 11), that is, in the second embodiment, the warp densely woven portion 6 has four warps 2 and the two are twisted together. The one woven with X-ray contrast yarn B is the highest (drawing strength 212.4 cN), and then the one woven with X-ray contrast yarn C in the same test is high (drawing strength 1233.6 cN).
Hereinafter, in the second test (FIG. 9), that is, in the first embodiment, four warp yarns of the warp densely woven portion 6 are woven into the X-ray contrast yarn B (pullout strength first time: 961 .6 cN, second time: 916.5 cN), then, in the third test (FIG. 10), that is, in the second embodiment, eight warps of the warp densely woven portion 6 are twisted together. The X-ray contrast yarn B woven (drawing strength 805.5 cN), then the first test (FIG. 8), that is, in the first embodiment, the warp 2 of the warp densely woven portion 6 is The pulling strength is higher in the order of eight woven X-ray contrast yarn B (drawing strength first time: 686.8 cN, second time: 628.2 cN).
And these medical gauze 1 of 1st and 2nd embodiment of this invention are X-ray contrast yarns 4 and 4A rather than the thing of a 1st and 2nd comparative test (FIG. 12, FIG. 13). High pulling strength.

  DESCRIPTION OF SYMBOLS 1 ... Medical gauze, 2 ... Warp, 3 ... Weft, 4 ... X-ray contrast yarn, 5 ... Plain weave part, 6 ... Warp densely woven part, 8 ... Ear part.

Claims (3)

A medical gauze in which a plurality of warps and wefts arranged at intervals and intersecting each other are used as constituent yarns, and an X-ray contrast yarn is woven as at least one warp,
A warp densely woven portion that is densely woven so that the adjacent ones of the plurality of warps are in contact with each other is provided on the ear portion where the weft is folded,
The X-ray contrast yarn is disposed so that one side is in contact with the warp densely woven portion, and the warp yarn adjacent to the other side of the X-ray contrast yarn is not densely woven. gauze. The medical gauze according to claim 1, wherein the warp densely woven portion is composed of four warps. 3. The medical gauze according to claim 1, wherein the X-ray contrast yarn is formed by twisting a plurality of X-ray contrast yarns to form an unevenness that engages with the weft.

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