WO2014084146A9

WO2014084146A9 - Surgical thread, surgical small pad and blood vessel tape that use the thread

Info

Publication number: WO2014084146A9
Application number: PCT/JP2013/081556
Authority: WO
Inventors: 徹也小澤; 信久清家; 強平野; 雅喜川端; 武之濱口; 麻衣谷口
Original assignee: 川本産業株式会社
Priority date: 2012-11-28
Filing date: 2013-11-22
Publication date: 2015-03-19
Also published as: JPWO2014084146A1; WO2014084146A1; KR20150090170A; BR112015012226A2; JP6251182B2

Abstract

Provided are a surgical small pad and a blood vessel tape which enable a reduction in the possibility of damaging internal organs and hold water absorbability and pliability, and a thread used therefor. This thread is characterized by being configured by braiding a plurality of covered yarns each formed by winding a coating fiber around a core thread produced from a filament containing a radiopaque substance. The core thread can be configured by bundling a plurality of polypropylene filaments, and the coating fiber can be produced from polyethylene terephthalate. This surgical small pad is characterized by being provided with a water-absorbing pad main body formed by stacking a plurality of nonwoven fabrics, and in that the thread is welded onto the pad main body.

Description

Surgical thread, small pad for surgery using the thread and vascular tape

The present invention is, for example, a thread used in brain surgery and orthopedic surgery, a small pad for surgery using the thread and a blood vessel tape, which can be found in the body by X-ray imaging etc. The present invention relates to a yarn, a small surgical pad, and a blood vessel tape that can contribute to the prevention of residue.

In the case of surgery, a large number of gauze is used for the purpose of suppression of bleeding, absorption of body fluid and saline, protection of organs from abrasion, dryness and contamination. If these gauze remains in the body, it may not only cause various physical disorders such as pain, discomfort or slight fever, but it may adversely affect not only the organ concerned but also the adjacent organs. It causes unpredictable long-term damage to the digestive system, circulatory system, respiratory system, brain and nervous system, skeletal system etc. and sometimes causes infection. It can also be a source of immune deficiency. Because of this possibility, it is essential to take all the gauze out of the body at the end of the surgery.

Therefore, in the surgery, gauze may be used in which one of the warp forming the gauze is replaced with contrast yarn and woven, and radiography (radiography) is performed before closing the surgical site at the end of the surgery. In many cases, a method is used in which the presence or absence of residual gauze is confirmed by using the contrast thread as a clue, and all found are removed.

As the contrast yarn, polypropylene, a multifilament obtained by kneading barium sulfate in a polystyrene resin, or a filament obtained by kneading barium sulfate in polyvinyl chloride or a silicon resin is used (see, for example, Patent Document 1) . Since these resin-based materials have poor water absorbability and do not stain in blood, there is an advantage that even if the gauze main body is stained with blood, for example, if it is a contrasting thread dyed in blue, it is easy to visually recognize even with the naked eye. Those which can not be detected by the naked eye can be detected by radiography.

Further, Patent Document 2 describes a gauze containing an X-ray contrast yarn for preventing the fibers of the gauze from being detached and the X-ray contrast yarn being detached. Specifically, the X-ray contrast yarn is prevented from falling off by welding and fixing the X-ray contrast yarn containing the thermoplastic fiber to the woven or non-woven fabric. Furthermore, the X-ray contrast yarn is prevented from falling off by sandwiching the X-ray contrast yarn between the non-woven fabric and the non-woven fabric in a sandwich state by sandwiching the X-ray contrast yarn by water pressure such as water jet. There is also an idea.

Patent Document 3 discloses an absorbent woven fabric attached with a locator string. This yarn is configured by spirally winding a yarn around a bundle of five monofilaments (X-ray contrast yarn) (FIG. 3 of Patent Document 3). In addition, it is described that it is preferable to bind the said monofilament by heat etc.

Unexamined-Japanese-Patent No. 2003-319966 JP, 2005-177034, A U.S. Pat. No. 5,112,325

However, in the X-ray contrast yarn containing gauze of Patent Document 2, since the X-ray contrast yarn is welded from one end to the other end of the gauze, the ratio of the welded portion to the entire gauze becomes large. Since the welded portion has rigidity, the gauze of Patent Document 2 is very likely to damage the organ. Moreover, in the method of sandwiching the X-ray contrast thread by the water pressure of water jet, for the purpose of preventing the falling out of the X-ray contrast thread, the sandwich of the X-ray contrast thread is strengthened using considerable water pressure. Since the thickness is significantly reduced, the inherent water absorbability and flexibility of the nonwoven fabric are reduced. Furthermore, the positioning yarn of Patent Document 3 is considered to lack flexibility because it has a configuration in which a plurality (five in the example) of monofilaments are bound by heat or the like.
In addition, there is a similar situation to the above-mentioned small pad for surgery in the case of a blood vessel tape used for identifying a blood vessel or the like during operation, pulling a blood vessel, temporarily holding a tissue, and the like.

The present invention has been made in view of the above-mentioned circumstances, and it is possible to reduce the risk of damaging the organ, and to use the small pad for surgery, the blood vessel tape, and the yarn used for these to maintain water absorbency and flexibility. Intended to be provided.

The gist according to the present invention is characterized in that a plurality of covered yarns obtained by winding a covering fiber around a core yarn comprising a filament containing an X-ray impermeable material are braided.

In the yarn of the present invention, the melting point difference between the filament and the coating fiber is preferably 30 to 200 ° C.

In the yarn of the present invention, a multifilament formed by bundling a plurality of filaments can be used as the core yarn.

In the yarn of the present invention, the multifilaments can be configured by bundling 2 to 50 filaments, and it is preferable that the multifilaments have a fineness of 100 to 1,500 dtex.

In the yarn of the present invention, a monofilament having a fineness of 30 to 750 dtex can be used as the core yarn.

In the yarn of the present invention, as the filament, one containing one or more selected from polyethylene, polypropylene, polyvinyl chloride, and polystyrene can be used.

In the yarn of the present invention, as the covering fiber, one containing one or more selected from polyethylene terephthalate, nylon, and polybutylene terephthalate can be used.

The small surgical pad according to the present invention is an absorbent made of one non-woven fabric or a plurality of non-woven fabrics laminated, or one or more non-woven fabrics and one or more woven fabrics laminated. A gist of the present invention is that the above-mentioned yarn is joined to the pad body.

In the small-sized surgical pad according to the present invention, the absorbent pad main body comprises the plurality of non-woven fabrics sewn with a sewing thread made of synthetic fiber, natural fiber, regenerated fiber, or semi-synthetic fiber; Preferably, a part is welded to all or part of the sewing thread.

In the small surgical pad according to the present invention, a part of the thread can be sutured and joined to the absorbent pad body.
In the small surgical pad according to the present invention, a part of the yarn can be glued to and bonded to the absorbent pad body.

The blood vessel tape according to the present invention is summarized as using the above-mentioned thread.
In the blood vessel tape of the present invention, the yarn is preferably an odd-numbered flat set.

According to the yarn according to the present invention, by forming a plurality of covered yarns obtained by winding covering fibers around a core yarn containing an X-ray impermeable material as a braid, it becomes possible to suppress rigidity and bend it. The rigidity can be reduced and high flexibility can be provided.

According to the small pad for surgery which concerns on this invention, it can prevent that this withdrawal thread damages an organ etc. by employ | adopting the said thread | yarn as a withdrawal thread. In addition, since the drawn yarn has high flexibility, the flexibility of the portion (pad portion) to which the drawn yarn is attached is not impaired.

In addition, since it is not necessary to sandwich an X-ray contrast thread between the pads as in the prior art, the pad does not become hard by the X-ray contrast thread. Therefore, the small surgical pad according to the present invention is extremely excellent in organ protection because it has flexibility at both the attachment portion and the raw fabric portion of the drawing thread. Furthermore, it is possible to use a small surgical pad having such organ protecting properties as a means for preventing dryness of the organ.

Further, by incorporating an X-ray impermeable material into the core yarn of the above-mentioned drawn yarn, it is possible to impart the function of the X-ray contrast yarn to the drawn yarn. Therefore, it is not necessary to separately provide the X-ray contrast thread and the pull-out thread.

According to the blood vessel tape of the present invention, by using the above-mentioned thread, it is possible to prevent the blood vessel tape from damaging an organ or the like while providing an X-ray imaging function. Further, in the blood vessel tape, since the yarn used is a braid, it is possible to have sufficient strength and flexibility. Further, in the blood vessel tape of the present invention, the use of the yarn in an odd-numbered flat set can improve ease of use.

It is a perspective view which shows the small pad for surgery which concerns on this invention. It is a photograph of the withdrawal thread attached to an absorptive pad body. It is a perspective view showing a covered yarn. (A)-(c) is an explanatory view showing a method of manufacturing a braid. 5 is a photograph showing the drawn yarn of Comparative Example 1; It is a graph which shows the result of a bending rigidity measurement test. About Example 2, (a) is an X-ray CT image according to 3D data taken from the welding surface side (the front side of the paper surface of FIG. 1), and (b) is taken from the nonwoven fabric side (the back side of the paper surface of FIG. 1) It is an X-ray CT image concerning 3D data. About Example 4, (a) is an X-ray CT image concerning 3D data taken from the welding surface side, (b) is an X-ray CT image concerning 3D data taken from the nonwoven fabric side. About the comparative example 2, (a) is an X-ray CT image which concerns on 3D data image | photographed from the welding surface side, (b) is an X-ray CT image which concerns on 3D data image | photographed from the nonwoven fabric surface side. About Comparative Example 4, (a) is an X-ray CT image related to 3D data captured from the welding surface side, and (b) is an X-ray CT image related to 3D data captured from the nonwoven fabric surface side. It is a graph which shows the result of a tension test. (A) is a photograph which shows the state of the drawing thread after the tension test of Example 2, (b) is a photograph which shows the same state of Example 3, (c) shows the same state of Comparative Example 2. It is a photograph. It is a drawing substitute photograph which shows the appearance of a pressure distribution test. (A) to (h) are drawing substitute photographs showing the small surgical pad used in Example 5 and Comparative Examples 5 to 11, respectively. (A), (b) is a pressure distribution map of Example 5, (c), (d) is a pressure distribution map of Comparative Example 5, (e), (f) is a pressure distribution of Comparative Example 6. FIG. (A), (b) is a pressure distribution map of Comparative Example 7, (c), (d) is a pressure distribution map of Comparative Example 8, and (e), (f) is a pressure distribution of Comparative Example 9. FIG. (A), (b) is a pressure distribution map of Comparative Example 10, (c) is a pressure distribution map of Comparative Example 11.

Hereinafter, the present invention will be described in detail based on the embodiments shown in the drawings.
In FIG. 1, the small surgical pad 10 according to the present invention is, for example, an absorbent pad main body 1 in which a plurality of non-woven fabrics made of cupra rayon are laminated, and the drawing thread 3 is attached. In addition, although what comprised the nonwoven fabric of the absorptive pad main body 1 in FIG. 1 was illustrated in figure, it can also comprise with the nonwoven fabric of 1 sheet. The absorbent pad main body 1 can also be configured by laminating one or more nonwoven fabrics and one or more woven fabrics. Further, although the drawing in which the attachment of the drawn yarn 3 is performed by welding is illustrated in the same drawing, it may be performed by another bonding method such as suturing or pasting instead of the welding.

The pull-out yarn 3 is for taking out the absorbent pad main body 1 from the body cavity to the outside of the body cavity, and can prevent the remaining accident. The number of laminated layers of the non-woven fabric can be set arbitrarily, such as 2 to 6, for example. The absorbent pad main body 1 in which the non-woven fabrics are laminated can be configured by sewing the plurality of non-woven fabrics over the substantially central portion in the width direction with the sewing thread 2 over the longitudinal direction of the non-woven fabric. The normal thickness of the absorbent pad body 1 is 0.5 to 1.5 mm, and the wet thickness is 0.3 to 1.0 mm.

As the suture thread 2, one made of synthetic fiber, natural fiber, regenerated fiber, or semi-synthetic fiber can be used. PET (polyethylene terephthalate), PP (polypropylene), nylon etc. can be mentioned as an example of the above-mentioned synthetic fiber, cotton and hemp etc can be mentioned as an example of a natural fiber, rayon is an example of a regenerated fiber And viscose rayon and cupra rayon etc., and examples of semi-synthetic fibers include acetate etc.

It is desirable that the plurality of non-woven fabrics be pressed and laminated to each other by a needle punch. While being able to ensure the softness and water absorbency of the whole absorptive pad main body rather than the pad compression-formed by the water jet, it is for making possibility of peeling each nonwoven fabric low.

The size of the absorbent pad body 1 is, for example, 5 mm to 30 mm in width × 5 mm to 60 mm in length, and the small surgical pad 10 according to the present invention operates especially for small parts like brain surgery or orthopedic surgery. Although the merit can be exhibited to the maximum by using when carrying out, the size is not limited to the above, and therefore the application site is not also limited.

It is preferable to make the surface on the opposite side to the surface to which the lead-out yarn 3 is attached in the absorbent pad main body 1 be the water absorption side. Since the withdrawal yarn 3 is not present on the opposite surface, the water absorbency of the absorbent pad main body 1 can be kept high, and the flexibility of the absorbent pad main body 1 can be kept high.

When attaching the drawn yarn 3 by welding, it is desirable that a part of the drawn yarn 3 be welded to all or a part of the sewing yarn 2. As will be described in detail later, a filament made of PP can be used as the drawing yarn 3, and the filament melts and is entangled with the suture yarn 2 by welding, so that yarn detachment hardly occurs. In FIG. 1, the length L of the portion to which the drawn yarn 3 is welded is preferably 1 to 10 mm, more preferably 3 to 10 mm, based on one end of the absorbent pad main body 1. This is to secure the flexibility of the absorbent pad main body 1 by reducing the welding area of the drawn yarn 3 within the range in which the drawn yarn 3 can be prevented from coming off. Even in the case where the pull-out thread 3 is sewn, it is desirable that the length of the sewn portion be equal to the length L.

Subsequently, the drawn yarn 3 attached to the absorbent pad body 1 of the present invention will be described in detail.
A braid as shown in FIG. 2 is used as the drawing yarn 3. This braid can be formed by preparing, for example, eight covered yarns 4 as shown in FIG. 3 and assembling them by the method described in FIG. In addition, it is generally called 8 strikes that eight cords are braided. The method of making the braid in FIG. 4 is an example, and is not limited to this, and can be assembled by other known methods.

In FIG. 3, the covered yarn 4 is used as a covering fiber in a core yarn 5 (300 dtex) consisting of a multifilament obtained by bundling, for example, five PP filaments into which an X-ray impermeable material (barium sulfate etc.) is kneaded. The coated yarn 6 made of PET can be wound and configured. As the above multifilament, 2 to 50 filaments may be bundled to form a filament having a fineness of 100 to 1,500 dtex. When a monofilament is used as the core yarn 5, the fineness of the monofilament can be in the range of 30 to 750 dtex.

Although PP is mentioned as an example of the above-mentioned filament and PET is mentioned as an example of the above-mentioned covering fiber, if the melting point difference between the filament and the covering fiber (having a higher melting point than this filament) is 30 to 200 ° C. It is not limited to these materials. Further, instead of forming the core yarn 5 with multifilaments as described above, it can also be made with monofilaments. For example, the filaments preferably include one or more selected from polyethylene, polypropylene, polyvinyl chloride, and polystyrene. Also, for example, the covering fiber preferably contains one or more selected from polyethylene terephthalate, nylon, and polybutylene terephthalate.

In FIG. 4A, eight covered yarns 4 are respectively 4a to 4h. With the covered yarns 4a to 4d arranged side by side, the covered yarns 4e are sequentially passed over the covered yarns 4a, under the covered yarns 4b, over the covered yarns 4c, and under the covered yarns 4d. The covered yarn 4f is disposed below the covered yarn 4a, above the covered yarn 4b, below the covered yarn 4c, and above the covered yarn 4d in parallel to the covered yarn 4e.

The covered yarn 4g is arranged parallel to the covered yarn 4f in the same manner as the covered yarn 4e, and the covered yarn 4h is arranged parallel to the covered yarn 4g in the same manner as the covered yarn 4f.

Next, a portion (lower portion in the drawing) of the covered yarn 4d which is not overlapped with any other covered yarn is folded as shown in FIG. The upper side of the covered yarn 4e, the lower side of the covered yarn 4f, the upper side of the covered yarn 4g, and the lower side of the covered yarn 4h are sequentially passed.

Next, as shown in FIG. 4 (c), the covered yarn 4e is folded at the portion not overlapping with any other covered yarn (the lower portion of the drawing) and crossed at the back as shown by the dashed line in the drawing. The yarn 4c is passed on the yarn 4c, below the covered yarn 4b, above the covered yarn 4a, and below the covered yarn 4d. Hereinafter, the braid is completed by repeating the operations of FIGS. 4 (b) and 4 (c) in the same manner.

According to the present invention, by forming the drawn yarn 3 by forming a plurality of covered yarns 4 as a braid, the drawn yarn 3 becomes very flexible and has flexibility. Therefore, it is possible to prevent the withdrawal yarn 3 from damaging the organs and the like. Further, by incorporating an X-ray impermeable material in the core yarn 5 of the drawing yarn 3, it is possible to impart the function of the X-ray contrast yarn to the drawing yarn 3. Therefore, it is not necessary to provide an X-ray contrast thread separately from the pull-out thread 3.

Further, in the gauze containing the X-ray contrast yarn of Patent Document 2 described above, since the X-ray contrast yarn is welded from one end to the other end of the gauze, the ratio of the welded portion to the entire gauze becomes large and the gauze main body becomes extremely rigid. However, in the present invention, by fixing the drawn-out yarn 3 to a small area of the absorbent pad main body 1 by welding or suturing, the flexibility of the entire absorbent pad main body 1 can be prevented while preventing the drawn-out yarn 3 from coming off. Can be secured. Thus, the pad body 1 can be prevented from damaging an organ or the like.

Furthermore, by forming a plurality of covered yarns 4 in which the coated yarn 6 made of PET is wound as a braid to form the drawn yarn 3, the coated yarn made of PET is wound around a multifilament obtained by bundling 20 to 40 PP filaments. The amount of PET per cross section can be greater than that of conventional drawn yarns. Therefore, the strength of the pull-out yarn 3 can not be strengthened easily.

In addition, although the withdrawal thread 3 of the present invention is used for the small pad for surgery in the above, it is not limited to this and is used when excluding target organ or non-target organ (organ near target) in surgery. It can be applied to excluded

The above is the modes for carrying out the present invention, and the present invention will be more specifically described below by way of examples. However, the present invention is not limited by the above embodiment as a matter of course. It is of course possible to implement with appropriate modifications as long as they are compatible with the purpose, and all of them are included in the technical scope of the present invention.

As a test to confirm the flexibility of the drawn yarn of the present invention, a flexural rigidity measurement test and a tensile test were conducted. Moreover, in order to confirm the welding state of the drawn-out thread | yarn before doing a tension test, X-ray CT imaging | photography was performed about below-mentioned Example 2, 4 and Comparative Example 2, 4.

(1) Bending Stiffness Measurement Test A test was conducted to measure the bending stiffness of the drawn yarn made of braid (Example 1). As a drawn-out yarn according to Comparative Example 1, an X-ray contrast yarn as shown in the photograph of FIG. 5 (a multifilament (3800 dtex) formed by bundling 40 filaments and wound with a PET yarn) was used.

In the bending stiffness measurement test, the draw-out yarn was deformed at a constant speed to the maximum curvature, and the bending stiffness between was measured. The higher the flexural rigidity value, the harder the yarn. The test conditions are as follows.

Test equipment: Automated pure bending tester (KESFB2-AUTO-A)
Clamp width: 1 cm
Number of measurements: 5 samples Condition: Wet condition (immersed in purified water and wet for 30 minutes)

The test results are shown in FIG. In FIG. 6, although the average value of the flexural rigidity of Comparative Example 1 is 0.1045 gf · cm ² / cm, the average value of the flexural rigidity of Example 1 is about 1/2 of that of Comparative Example 1 and 0.1. It became 0536 gf · cm ² / cm. From this result, it was confirmed that the flexibility of the drawn yarn of the present invention is high.

(2) Tensile test and X-ray CT imaging A tensile test was conducted to measure the welding strength of the drawn yarn of the present invention. In the test, tensile strength was measured as welding strength. The test conditions are as follows.

Test equipment: Constant speed extension type tensile tester Tensile speed: 100 mm / min
Holding distance: 15 cm
Number of measurements: 5 samples Condition: Wet condition (immersed in purified water and wet for 30 minutes)

The tensile test was performed using the following pads in each Example and Comparative Example. The imaging apparatus used for X-ray CT imaging in Examples 2 and 4 and Comparative Examples 2 and 4 is TOSCANER-32300 μFPD (manufactured by Toshiba IT Control System Co., Ltd.), and has a tube voltage of 160 kV and a tube current of 80 μA. The output was 12.8W.

(2-1) Example 2
Six non-woven fabrics (Cupla Rayon) were sewn by using a PET yarn as a sewing yarn, and X-ray CT imaging was performed on a pad in which a draw-out yarn made of a braid was welded on the PET yarn. 7 (a) is an X-ray CT image of 3D data taken from the welding surface side (the front side of the paper surface of FIG. 1), and FIG. 7 (b) is a 3D taken from the nonwoven fabric side (the back side of the paper surface of FIG. 1). It is an X-ray CT image concerning data. In FIG. 7 (b), fine spots like those indicate penetration into the non-woven fabric. The same applies to X-ray CT images shown in FIGS. 8 to 10 below.
Moreover, the tension test was done using the said pad.

(2-2) Example 3
Six non-woven fabrics were sewn by cotton yarn, and a tensile test was performed using a pad in which a draw-out yarn made of braid was welded on the cotton yarn.

(2-3) Example 4
An X-ray CT imaging was performed on a pad in which a pull-out yarn made of a braid was welded to the uppermost non-woven fabric without sewing six non-woven fabrics. X-ray CT images are shown in FIGS. 8 (a) and 8 (b).
Moreover, the tension test was done using the said pad.

(2-4) Comparative Example 2
Six non-woven fabrics were sewn by PET yarn, and X-ray CT imaging was performed on a pad obtained by welding a drawn yarn composed of the same X-ray contrast yarn (FIG. 5 as in Comparative Example 1) on this PET yarn. X-ray CT images are shown in FIGS. 9 (a) and 9 (b).
Moreover, the tension test was done using the said pad.

(2-5) Comparative Example 3
Six non-woven fabrics were sewn with a cotton thread, and a tensile test was conducted using a pad in which the same lead-out yarn made of the same X-ray contrast thread as in Comparative Example 1 was welded on this cotton thread.

(2-6) Comparative Example 4
An X-ray CT imaging was performed on a pad in which a pull-out yarn composed of the same X-ray contrast yarn as in Comparative Example 1 was welded to the uppermost non-woven fabric without sewing six non-woven fabrics. X-ray CT images are shown in FIGS. 10 (a) and 10 (b).
Moreover, the tension test was done using the said pad.

(2-7) Evaluation of X-ray CT Image In Comparative Example 2 in which a conventional X-ray contrast yarn is used as the drawing yarn, as shown in FIG. It was confirmed that they were uniformly dissolved.

On the other hand, in Example 2 using the draw-out yarn which consists of braids, as shown in FIG.7 (b), the amount of penetration is small also at parts other than PET sewing thread. It is considered that this is because all of the PP filaments dissolve in the non-woven fabric, and part or all of the coated yarn of PET having a melting point higher than that of PP remains undissolved. In addition to this, it is considered that the tensile strength of the drawn yarn of Example 2 is higher than that of Comparative Example 2 as described later by the drawn yarn being joined to the PET sewing yarn.

Further, in Comparative Example 4 in which the conventional X-ray contrast yarn was used as the drawing yarn, as shown in FIG. 10 (b), it was confirmed that the drawing yarn melted uniformly.

On the other hand, in Example 4 using a drawn yarn made of a braid, as shown in FIG. 8 (b), the amount of penetration of the drawn yarn is greater than that of Comparative Example 4 (FIG. 10 (b)) for the same reason as above. It has decreased.

(2-8) Results of Tensile Test The results of each test are shown in FIG. In FIG. 11, in Example 2, the average value of the tensile strength was 1006 gf, and the average value of the tensile strength significantly exceeded that of Comparative Example 2 in which the average value was 530 gf. Moreover, in Example 3, the average value of the tensile strength was 888 gf, and the average value of the tensile strength significantly exceeded that of Comparative Example 3 in which the average value was 665 gf. Thereby, it could be confirmed that the draw-out yarn made of the braid of the present invention is stronger in tension than the conventional X-ray contrast yarn.

Moreover, when Example 2 and 3 were compared, in order to raise tensile strength, it turned out that it is desirable to weld a leader thread on PET yarn. It is considered that this is because all the filaments made of PP dissolve into the non-woven fabric by welding, and part or all of the coated yarn made of PET having a melting point higher than that of PP remains unmelted. Furthermore, it was confirmed that the variation in tensile strength of Example 2 in which sewing was performed using PET yarn was much smaller than that in Example 3 in which sewing was performed using cotton yarn.

Further, from the results of Example 4 and Comparative Example 4, in the pad in which the drawn yarn was welded without sewing the non-woven fabric, the tensile strength was close to the value of both the braid of the present invention and the conventional X-ray contrast yarn.

12 (a) to 12 (c) show photographs after tensile tests according to Examples 2 and 3 and Comparative Example 2, respectively. As can be seen from FIG. 12 (a), although the sewing thread was partially broken, it was confirmed that the drawn yarn was not broken. Moreover, in FIG.12 (b), although the nonwoven fabric fractured partially, it has confirmed that a drawing thread did not fracture | rupture. Further, in FIG. 12C, since the content of PP in the X-ray contrast yarn is high and the content of PET is low, the amount of PP dissolved in the non-woven fabric is excessive and the remaining PET is decreased. As a result, breakage of the X-ray contrast yarn occurs before breakage of the nonwoven fabric and the nonwoven fabric. From the above, it was confirmed that the pull-out yarn of the present invention does not break in either of the sewing by the PET yarn and the sewing by the cotton yarn.

(3) Pressure Distribution Test In order to verify the organ protective property of the small pad for surgery, a test was conducted to measure the pressure distribution when pressure was applied to the pad. In the pressure distribution test, as shown in FIG. 13, a sensor sheet is disposed on a rubber mat, and a pad wetted with saline solution (0.9 w / v%) is placed on the sensor sheet. . A 50 gf / cm ² weight (φ 2.5 cm) was placed on the pad in this state, and the pressure distribution was investigated. In the pressure test, a surface pressure distribution measurement system I-SCAN (manufactured by Nitta Corporation) was used.

In the above-mentioned sensor sheet, in the configuration in which the first film made of PET provided with silver electrodes arranged in the row direction and the second film made of PET provided with silver electrodes arranged in the row direction are arranged opposite to each other. When loaded, the contact point between the silver electrodes becomes the sensing point, and the electrical resistance value is changed. The silver electrode is coated with a pressure sensitive conductive ink.

Fig.14 (a) is a photograph which shows the small pad (The same thing as FIG. 1) for surgery of Example 5, FIG.14 (b)-(h) is a photograph which shows the small pad of Comparative Examples 5-11, respectively. is there. Table 1 shows the thickness in the wet state, the method of joining the drawn yarn and the pad, and the radiopaque properties of the small pads of Example 5 and Comparative Examples 5 to 11. In addition, about X-ray contrast property of Table 1, "Pinch in a pad" means the thing in the state where X-ray contrast thread was pinched between pads, "welding to a pad" means the X-ray contrast thread on the surface of a pad. It means the one in the state of being welded.

Fig.15 (a), (b) is a pressure distribution map of Example 5, FIG.15 (c), (d) is a pressure distribution map of the comparative example 5, FIG.15 (e), (f) is a FIG. 16 is a pressure distribution diagram of Comparative Example 6. 16 (a) and 16 (b) are pressure distribution maps of Comparative Example 7, and FIGS. 16 (c) and 16 (d) are pressure distribution maps of Comparative Example 8, and FIGS. ) Is a pressure distribution diagram of Comparative Example 9. FIG. Further, FIGS. 17A and 17B are pressure distribution diagrams of Comparative Example 10, and FIG. 17C is a pressure distribution diagram of Comparative Example 11. The original fabric portion in FIG. 15 to FIG. 17 shows the pressure distribution when pressure is applied to the central portion of the pad, and the joint portion in FIG. 15 shows the pressure when applied to the joint portion between the pad and the drawn yarn. The pressure distribution is shown. The unit of the pressure value is kgf / cm ² in any of the above figures.

As shown in FIGS. 15 (a) and 15 (b), it was confirmed that the pressure was uniformly distributed in the small pad of the present invention. In particular, the uniform pressure distribution in FIG. 15 (b) is considered to be because the small pad of the present invention has only one side (not penetrated like sewing) by welding between the drawn yarn and the pad. . Further, since the small-sized pad of the present invention is bulky, it is also conceivable that the steric hindrance of the welded portion of the drawing yarn is alleviated by the bulkiness of the pad. From the above, it is considered that, in the small-sized pad of the present invention, the joint surface and the opposite side surface of the drawing thread do not impose loads on organs.

On the other hand, in the case of the small pad of Comparative Example 5, as shown in FIGS. 15 (c) and 15 (d), a pressure concentration area was confirmed in a horizontal line. It is considered that the pressure distribution becomes concentrated due to the steric hindrance of the X-ray contrast thread and the pull-out thread sandwiched in the pad.

Further, as shown in FIGS. 15 (e) and 15 (f), for the small pad of Comparative Example 6, the pressure concentration region as in Comparative Example 5 was not confirmed, but the configuration for welding the drawn yarn and the pad is attributable. In particular, it was confirmed that a relatively high pressure distribution exists in the lower part of FIG.

Next, as shown in FIGS. 16 (a) and 16 (b), in the case of the small pad of Comparative Example 7, a pressure concentration region was confirmed in the form of a horizontal line as in Comparative Example 5. The thickness of the pad in the wet state is thin, and the X-ray contrast thread caught in the pad and the drawn thread sewn on the pad become steric hindrance, and the pressure distribution is considered to be concentrated.

Subsequently, in the case of the small pad of Comparative Example 8, since the thickness in the wet state was thin, pressure concentration regions were confirmed in the upper and lower portions in FIG. In addition, since the drawn yarn is sewn to the pad, as shown in FIG. 16 (d), a horizontal linear pressure concentration region was also confirmed at the joint portion.

Moreover, also about the small pad of the comparative example 9, since the thickness in the wet state was thin, the pressure concentration area | region was confirmed over the center part from the upper part in FIG.16 (e). Further, since the X-ray contrast yarn is horizontally welded and the drawn yarn is sewn to the pad (sutures are in the vertical direction), as shown in FIG. The area (T-shaped) was confirmed.

Furthermore, since the thickness of the small pad of Comparative Example 10 in the wet state is larger than that of the small pad of Comparative Example 9, the pressure distribution in the raw fabric portion is higher than that of Comparative Example 9 as shown in FIG. It can be seen that it has been alleviated. However, since the X-ray contrast yarn is horizontally welded and the withdrawal yarn is sewn to the pad (sutures are in the vertical direction), as shown in FIG. The area (T-shaped) was confirmed.

Moreover, about the small pad of Comparative Example 11, although the thickness in the wet state is large, two X-ray contrast yarns are welded to the pad, and the drawn yarn is from one end side to the other end side in the length direction of the pad. Since the welding was performed for a relatively long time, a substantially rectangular pressure concentration region was confirmed in FIG. 17 (c).

From the above, when the small pad for surgery of the present invention is used as a cushioning material during surgery, even if pressure is applied to the pad, the pressure distribution becomes uniform at the pad, and therefore, the organ can be used for the organ. It was confirmed that the possibility of giving intensive load was low. Therefore, the small pad for surgery of the present invention proved to be extremely excellent also in organ protection.

In addition, the blood vessel tape 20 (not shown) can be created using the drawing thread 3 of this invention. Here, the vascular tape is a surgical tape used for identifying a blood vessel or the like during a procedure such as cardiovascular surgery or thoracic surgery, pulling a blood vessel, or temporarily holding a tissue.

It is preferable that the pull-out yarn 3 used for the blood vessel tape 20 be a multifilament having a fineness of 300 dtex. Further, the width of the blood vessel tape 20 is preferably 2 to 6 mm. The length of the vascular tape 20 is not particularly limited because it may be an appropriate length depending on the application.

According to the blood vessel tape 20, by using the drawing thread 3, it is possible to prevent the blood vessel tape from damaging an organ or the like while providing an X-ray imaging function. Further, in the blood vessel tape 20, since the drawn yarn 3 to be used is a braid, it is possible to have sufficient strength and flexibility.

The pull-out yarn 3 is preferably an even number round set when used for the small surgical pad 10, and preferably an odd number flat set when used for the blood vessel tape 20.
In the blood vessel tape 20, the ease of use can be improved by making the drawing yarns 3 be a flat set of odd numbers.

The present application claims the benefit of priority based on Japanese Patent Application No. 2012-259940 filed on November 28, 2012. The entire content of the specification of Japanese Patent Application No. 2012-259940 filed on November 28, 2012 is incorporated herein by reference.

The thread for surgery according to the present invention, a small pad for surgery using the thread, and a vascular tape are effectively used in various operations such as endoscopic surgery and open surgery (including cardiovascular surgery and chest surgery). can do.

1 Absorbent pad body 2 Sewing thread 3 Pull-out thread (thread)
4, 4a to 4h Covered yarn 5 core yarn 6 coated yarn (coating fiber)
10 Small Surgical Pads 20 Blood Vessel Tape

Claims

A yarn characterized in that a plurality of covered yarns obtained by winding a covering fiber around a core yarn comprising a filament containing an X-ray impermeable material is used as a braid.
The yarn according to claim 1, wherein the melting point difference between the filament and the coating fiber is 30 to 200 属 C.
The yarn according to claim 1 or 2, wherein the core yarn is a multifilament formed by bundling a plurality of filaments.
The yarn according to claim 3, wherein the multifilament is formed by bundling 2 to 50 filaments and has a fineness of 100 to 1,500 dtex.
The yarn according to claim 1 or 2, wherein the core yarn is a monofilament having a fineness of 30 to 750 dtex.
The yarn according to any one of the preceding claims, wherein the filaments comprise one or more selected from polyethylene, polypropylene, polyvinyl chloride and polystyrene.
The yarn according to any one of claims 1 to 6, wherein the covering fiber comprises one or more selected from polyethylene terephthalate, nylon, and polybutylene terephthalate.
The absorbent pad main body is made of one non-woven fabric or a plurality of non-woven fabrics laminated, or one or a plurality of non-woven fabrics and one or a plurality of woven fabrics are laminated; A small surgical pad comprising the yarn according to any one of claims 1 to 7 joined thereto.
The absorbent pad body according to any one of claims 1 to 7, wherein the plurality of non-woven fabrics are sewn with a sewing thread made of synthetic fibers, natural fibers, regenerated fibers, or semi-synthetic fibers. The small surgical pad according to claim 8, wherein a part of the thread is welded to all or part of the sewing thread.
The small surgical pad according to claim 8, wherein a part of the thread according to any one of claims 1 to 7 is sutured to the absorbent pad body.
The small surgical pad according to claim 8, wherein a part of the yarn according to any one of claims 1 to 7 is glued to the absorbent pad body.
A blood vessel tape characterized by using the yarn according to any one of claims 1 to 7.
The blood vessel tape according to claim 12, wherein the yarn is an odd-numbered flat set.