JP6251182B2 - Small surgical pad and method for manufacturing the same - Google Patents

Description

  The present invention is, for example, a thread used in brain surgery or orthopedic surgery, a small surgical pad and a vascular tape using the thread, and the presence in the body can be found by X-ray imaging or the like. The present invention relates to a thread, a small surgical pad, and a vascular tape that can contribute to the prevention of leftovers.

  During surgery, a number of gauze is used for the purpose of suppressing bleeding, absorbing bodily fluids and physiological saline, protecting organs from abrasions, dryness and contamination. If these gauze remain in the body, not only will it cause various physical problems such as pain, discomfort, or slight fever, but it may adversely affect not only the organ but also the adjacent organs. It causes unpredictable long-term damage to the digestive system, circulatory system, respiratory system, brain / nervous system, skeletal system, etc., and sometimes causes infection. It may also be a remote cause of immune deficiency. Because of this concern, it is essential to remove all gauze from the body at the end of the surgery.

  Therefore, in surgery, gauze that weaves one of the warps constituting gauze in place of the contrast yarn may be used, and X-ray contrast (X-ray imaging) is performed before closing the surgical site at the end of the surgery. Increasingly, a method is used in which the presence of gauze is checked using the contrasted thread as a clue, and all found ones are removed.

  As the contrast yarn, a multifilament in which barium sulfate is kneaded into polypropylene or polystyrene resin, or a filamentous body in which barium sulfate is kneaded into polyvinyl chloride or silicon resin is used (for example, see Patent Document 1). . Since these resin-based materials are poor in water absorption and do not stain blood, there is an advantage that even if the gauze body is stained with blood, for example, if it is a contrasting thread dyed blue, it is easily visible with the naked eye. Things that cannot be detected with the naked eye can be detected by X-ray imaging.

  Patent Document 2 describes a gauze containing an X-ray contrast yarn for preventing the fiber of the gauze from fraying and removing the X-ray contrast yarn. 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 sandwiched by sandwiching the X-ray contrast yarn between the non-woven fabric, and the non-woven fabric is bonded while the X-ray contrast yarn is sandwiched by water pressure such as a water jet to prevent the X-ray contrast yarn from falling off. There are things to plan.

  Patent Document 3 discloses an absorbent woven fabric to which a locator string is attached. 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). It is described that the monofilament is preferably bundled by heat or the like.

JP 2003-319966 A Japanese Patent Application Laid-Open No. 2005-177034 US Pat. No. 5,112,325

However, in the gauze containing the X-ray contrast yarn 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 in the entire gauze is increased. Since this welded portion has rigidity, the gauze of Patent Document 2 is very likely to damage the organ. In addition, in the method of sandwiching the X-ray contrast yarn with the water pressure of the water jet, for the purpose of preventing the X-ray contrast yarn from falling off, the sandwich of the X-ray contrast yarn is strengthened using a considerable water pressure. Since thickness will become remarkably thin, the original water absorption and a softness | flexibility of a nonwoven fabric will reduce. Furthermore, since the positioning yarn of Patent Document 3 has a configuration in which a plurality of monofilaments (5 in the embodiment) are bundled by heat or the like, it is considered that flexibility is lacking.
In addition, blood vessel tape used for identifying blood vessels and the like during surgery, pulling blood vessels, and temporarily holding tissues has the same situation as the above-described small surgical pad.

  The present invention has been made in view of the circumstances as described above, and it is possible to reduce the risk of damaging an organ, and to provide a small surgical pad, vascular tape, and thread used for these that retain water absorption and flexibility. The purpose is to provide.

  The gist of the yarn according to the present invention is that a plurality of covered yarns obtained by winding a covering fiber around a core yarn made of a filament containing an X-ray non-transparent substance is formed by braiding.

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

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

  In the yarn of the present invention, the multifilament can be constituted by bundling 2 to 50 filaments, and the multifilament preferably has a fineness of 100 to 1500 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, a filament containing one or more selected from polyethylene, polypropylene, polyvinyl chloride, and polystyrene can be used as the filament.

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

  The small surgical pad according to the present invention is composed of one non-woven fabric or a laminate of a plurality of non-woven fabrics, or an absorption comprising a laminate of one or a plurality of non-woven fabrics and one or a plurality of fabrics. The gist of the present invention is that the yarn is joined to the pad body.

  In the small surgical pad of the present invention, the absorbent pad body is formed by sewing the plurality of nonwoven fabrics with a sewing thread made of synthetic fiber, natural fiber, regenerated fiber, or semi-synthetic fiber. It is preferable that a part is welded to all or a part of the sewing thread.

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

The vascular tape according to the present invention is characterized by using the above thread.
In the vascular tape of the present invention, it is preferable that the yarn is an odd-numbered flat set.

  According to the yarn according to the present invention, by forming a plurality of covered yarns obtained by wrapping a covering fiber around a core yarn containing an X-ray impermeable substance as a braid, it is possible to suppress bending and prevent bending. The rigidity can be lowered and high flexibility can be provided.

  According to the small surgical pad according to the present invention, it is possible to prevent the drawn thread from damaging an organ or the like by employing the thread as the drawn thread. Further, 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 the X-ray contrast thread between the pads as in the prior art, the pad is not hardened by the X-ray contrast threads. Therefore, the small surgical pad of the present invention is very excellent in organ protection because both the attached portion of the drawn-out thread and the original fabric portion are flexible. Furthermore, such a small surgical pad having organ-protecting properties can be used as a means for preventing dryness of the organ.

  In addition, the function of the X-ray contrast yarn can be imparted to the drawn yarn by including an X-ray impermeable substance in the core yarn of the drawn yarn. Therefore, it is not necessary to provide the X-ray contrast yarn and the drawn yarn separately.

  According to the vascular tape concerning the present invention, by using the above-mentioned thread, it is possible to prevent the vascular tape from damaging an organ or the like while having an X-ray contrast function. Moreover, in this blood vessel tape, since the thread | yarn to be used is a braid, it can fully have intensity | strength and a softness | flexibility. Further, in the vascular tape of the present invention, the thread can be made into an odd-numbered flat group to improve usability.

It is a perspective view which shows the small surgical pad which concerns on this invention. It is a photograph of the drawn-out yarn attached to an absorptive pad main body. It is a perspective view which shows a covered yarn. (A)-(c) is explanatory drawing which shows the manufacturing method of a braid. 3 is a photograph showing a 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 related to 3D data photographed from the welding surface side (the front surface side of FIG. 1), and (b) is photographed from the nonwoven fabric surface side (the back surface of the paper surface in FIG. 1). It is an X-ray CT image concerning 3D data. Regarding Example 4, (a) is an X-ray CT image related to 3D data imaged from the welding surface side, and (b) is an X-ray CT image related to 3D data imaged from the nonwoven fabric surface side. Regarding Comparative Example 2, (a) is an X-ray CT image related to 3D data imaged from the welding surface side, and (b) is an X-ray CT image related to 3D data imaged from the nonwoven fabric surface side. Regarding Comparative Example 4, (a) is an X-ray CT image related to 3D data imaged from the welding surface side, and (b) is an X-ray CT image related to 3D data imaged from the nonwoven fabric surface side. It is a graph which shows the result of a tension test. (A) is a photograph showing the state of the drawn yarn after the tensile test of Example 2, (b) is a photograph showing the same state of Example 3, and (c) is the same state of Comparative Example 2. It is a photograph. It is a drawing substitute photograph which shows the mode of a pressure distribution test. (A)-(h) is drawing substitute photograph which shows the small surgical pad used in Example 5 and Comparative Examples 5-11, respectively. (A), (b) is a pressure distribution figure of Example 5, (c), (d) is a pressure distribution figure of Comparative Example 5, (e), (f) is a pressure distribution of Comparative Example 6. FIG. (A), (b) is a pressure distribution figure of comparative example 7, (c), (d) is a pressure distribution figure of comparative example 8, (e), (f) is a pressure distribution of comparative example 9. FIG. (A), (b) is a pressure distribution figure of the comparative example 10, (c) is a pressure distribution figure of the comparative example 11. FIG.

Hereinafter, the present invention will be described in detail based on the embodiments shown in the drawings.
In FIG. 1, a small surgical pad 10 according to the present invention is one in which a drawn yarn 3 is attached to an absorbent pad main body 1 in which a plurality of nonwoven fabrics made of, for example, cupra rayon are laminated. In FIG. 1, the absorbent pad main body 1 is illustrated as being composed of a plurality of nonwoven fabrics, but may be composed of a single nonwoven fabric. Moreover, the absorptive pad main body 1 can also be comprised by laminating | stacking 1 sheet or several sheets of nonwoven fabric, and 1 sheet or several sheets of fabric. Further, in the same figure, the drawn yarn 3 attached by welding is shown, but it can be replaced by other joining methods such as sewing or gluing instead of the welding.

  The drawn-out yarn 3 is for taking out the absorbent pad main body 1 from the body cavity to the outside of the body, and can prevent a residual accident. The number of laminated nonwoven fabrics can be arbitrarily set, for example, 2-6. The absorbent pad main body 1 in which the nonwoven fabrics are laminated can be formed by sewing the plurality of nonwoven fabrics with a sewing thread 2 at substantially the center in the width direction of the nonwoven fabrics. 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 sewing thread 2, one made of synthetic fiber, natural fiber, regenerated fiber, or semi-synthetic fiber can be used. Examples of the synthetic fibers include PET (polyethylene terephthalate), PP (polypropylene), and nylon. Examples of natural fibers include cotton and linen. Examples of regenerated fibers include rayon. , Viscose rayon, and cupra rayon. Examples of semi-synthetic fibers include acetate.

  It is desirable that the plurality of nonwoven fabrics be pressed against each other by a needle punch and stacked. This is because it is possible to ensure the flexibility and water absorption of the entire absorbent pad body and to reduce the possibility that each nonwoven fabric will peel off rather than the pad formed by compression with a water jet.

  The size of the absorbent pad main body 1 is, for example, 5 mm to 30 mm wide × 5 mm to 60 mm long, and the small surgical pad 10 according to the present invention is operated on a fine part, particularly in brain surgery or orthopedic surgery. However, the size is not limited to the above, and the application site is not limited.

  In the absorbent pad main body 1, the surface opposite to the surface on which the drawn yarn 3 is attached is preferably the water absorption side. Since the withdrawal yarn 3 does not exist on the opposite surface, the water absorption of the absorbent pad body 1 can be kept high, and the flexibility of the absorbent pad body 1 can be kept high.

  When the drawn thread 3 is attached by welding, it is desirable that a part of the drawn thread 3 is welded to all or a part of the sewing thread 2. As will be described in detail later, a filament made of PP can be used for the drawn-out thread 3, and the filament is melted by welding and entangled with the sewing thread 2, so that it is difficult for the thread to come off. In FIG. 1, the length L of the portion where 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 region of the drawn yarn 3 within a range in which the drawn yarn 3 can be prevented from coming off. Even when the drawn thread 3 is sutured, it is desirable that the length of the stitched portion is the same as the length L.

Next, the drawn-out yarn 3 attached to the absorbent pad main body 1 of the present invention will be described in detail.
A braided string as shown in FIG. 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. Note that making eight strings into braids is generally called eight strokes. The method of making the braid shown in FIG. 4 is an example, and the present invention is not limited to this, and the braid can be assembled by other known methods.

  In FIG. 3, the covered yarn 4 is a core fiber 5 (300 dtex) made of multifilaments in which, for example, five PP filaments kneaded with an X-ray impermeable substance (barium sulfate or the like) are used as coating fibers. A covered yarn 6 made of PET can be wound around. In addition, as said multifilament, what is comprised by bundling 2-50 filaments and having a fineness of 100-1500 dtex can be used. Moreover, when using a monofilament as the core yarn 5, the fineness of this monofilament can be made into the range of 30-750 dtex.

  PP is given as an example of the filament, and PET is given as an example of the covering fiber. If the melting point difference between the filament and the covering fiber (having a higher melting point than the filament) is 30 to 200 ° C, It is not limited to these materials. Further, the core yarn 5 can be formed of a monofilament instead of the multifilament as described above. For example, the filament preferably includes one or more selected from polyethylene, polypropylene, polyvinyl chloride, and polystyrene. For example, it is preferable that the coating fiber includes one or more selected from polyethylene terephthalate, nylon, and polybutylene terephthalate.

  In FIG. 4A, the eight covered yarns 4 are 4a to 4h, respectively. In a state where the covered yarns 4a to 4d are arranged side by side, the covered yarn 4e is arranged so as to pass through the covered yarn 4a, below the covered yarn 4b, above the covered yarn 4c, and below the covered yarn 4d. The covered yarn 4f is arranged in parallel with the covered yarn 4e through the covered yarn 4a, under the covered yarn 4b, under the covered yarn 4c, and over the covered yarn 4d in this order.

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

  Next, the portion of the covered yarn 4d that does not overlap with any other covered yarn (the portion below the paper surface) is folded as shown in FIG. 4B and crossed at the back as shown by the chain line in the figure, The cover yarn 4e, the cover yarn 4f, the cover yarn 4g, and the cover yarn 4h are sequentially passed.

  Next, as shown in FIG. 4C, the portion of the covered yarn 4e that does not overlap with any other covered yarn (the portion below the paper surface) is bent and crossed at the back as shown by the chain line in the figure. The yarn is passed through the yarn 4c, under the covered yarn 4b, over the covered yarn 4a, and under the covered yarn 4d. Thereafter, the braid is completed by repeating the operations shown in FIGS. 4B and 4C in the same manner.

  According to the present invention, when the drawn yarn 3 is formed by using a plurality of covered yarns 4 as a braid, the drawn yarn 3 becomes very supple and flexible. Accordingly, it is possible to prevent the drawn yarn 3 from damaging an organ or the like. Moreover, the function of the X-ray contrast yarn can be imparted to the drawn yarn 3 by including the X-ray non-permeable substance in the core yarn 5 of the drawn yarn 3. Therefore, it is not necessary to provide an X-ray contrast yarn separately from the drawn yarn 3.

  Moreover, in the gauze containing the X-ray contrast thread of the above-mentioned patent document 2, since the X-ray contrast thread is welded from one end of the gauze to the other end, the ratio of the welded portion in the entire gauze is increased, and the gauze body is extremely rigid. However, in the present invention, the drawn-out yarn 3 is fixed to a small region of the absorbent pad main body 1 by welding or stitching, so that the drawn-out yarn 3 is prevented from coming off and the entire absorbent pad main body 1 is flexible. Can be secured. Therefore, it is possible to prevent the pad main body 1 from damaging an organ or the like.

  Furthermore, the drawn yarn 3 is formed by using a plurality of covered yarns 4 around which the PET coated yarn 6 is wound to form a drawn yarn 3, thereby winding the PET coated yarn around a multifilament in which 20 to 40 PP filaments are bundled. The amount of PET per cross section can be increased as compared with the conventional drawn yarn. Therefore, the strength of the drawn-out yarn 3 is increased and is difficult to cut.

  In the above, the drawn-out thread 3 of the present invention is used for a small surgical pad, but the present invention is not limited to this, and is used when excluding a target organ or an off-target organ (an organ near the target) in a surgical operation. It can also be applied to an extruding body.

  The above is a mode for carrying out the present invention, and the present invention will be described more specifically with reference to examples. However, the present invention is not limited by the above embodiment and is not limited to the above. Needless to say, the present invention can be carried out with appropriate modifications within a range that can be adapted to the spirit of the present invention, and all of them are included in the technical scope of the present invention.

  As tests for confirming the flexibility of the drawn yarn of the present invention, a bending stiffness measurement test and a tensile test were performed. Further, in order to confirm the welded state of the drawn yarn before the tensile test, X-ray CT imaging was performed on Examples 2 and 4 and Comparative Examples 2 and 4 described later.

(1) Flexural rigidity measurement test A test was performed to measure the flexural rigidity of the drawn yarn made of braid (Example 1). As the drawn yarn according to Comparative Example 1, an X-ray contrast yarn as shown in the photograph in FIG. 5 (a PET filament wound around a multifilament (3800 dtex) formed by bundling 40 filaments) was used.

  In the bending stiffness measurement test, the drawn yarn was deformed at a constant speed until the maximum curvature was reached, and the bending stiffness was measured during that time. Note that the higher the bending stiffness value, the harder the yarn. The test conditions are as follows.

Test equipment: Automated pure bending tester (KESFB2-AUTO-A)
Clamp width: 1cm
Number of measurements: 5 samples State: wet state (soaked in purified water for 30 minutes)

The test results are shown in FIG. In FIG. 6, the average value of the bending rigidity of Comparative Example 1 was 0.1045 gf · cm ² / cm, but the average value of the bending rigidity of Example 1 was about ½ that of Comparative Example 1. 0536 gf · cm ² / cm. From this result, it was confirmed that the drawn yarn of the present invention has high flexibility.

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

Test equipment: Constant speed extension type tensile tester Tensile speed: 100 mm / min
Gripping distance: 15cm
Number of measurements: 5 samples State: wet state (soaked in purified water for 30 minutes)

  In each Example and Comparative Example, a tensile test was performed using the following pads. The imaging device 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.), the tube voltage is 160 kV, the tube current is 80 μA, The output was 12.8W.

(2-1) Example 2
Six nonwoven fabrics (cupra rayon) were sewed with PET yarn as a sewing thread, and X-ray CT imaging was performed on a pad in which a drawn yarn made of braid was welded onto this PET yarn. FIG. 7A is an X-ray CT image related to 3D data photographed from the welding surface side (the front surface side of FIG. 1), and FIG. 7B is a 3D image photographed from the nonwoven fabric surface side (the back surface of the paper surface of FIG. 1). It is an X-ray CT image concerning data. In FIG.7 (b), a thing like a fine spot represents the melt | dissolution to a nonwoven fabric. The same applies to the X-ray CT images shown in FIGS.
Moreover, the tension test was done using the said pad.

(2-2) Example 3
Six nonwoven fabrics were sewed with cotton yarn, and a tensile test was performed using a pad in which a drawn yarn made of braid was welded onto the cotton yarn.

(2-3) Example 4
X-ray CT imaging was performed on the pad in which the drawn yarn made of braid was welded to the uppermost nonwoven fabric without sewing the six nonwoven fabrics. X-ray CT images are shown in FIGS.
Moreover, the tension test was done using the said pad.

(2-4) Comparative Example 2
Six nonwoven fabrics were sewed with PET yarn, and X-ray CT imaging was performed on the pad on which the drawn yarn made of the same X-ray contrast yarn as in Comparative Example 1 (FIG. 5 above) was welded. 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 nonwoven fabrics were sewed with cotton yarn, and a tensile test was performed using a pad on which a drawn yarn made of the same X-ray contrast yarn as in Comparative Example 1 was welded.

(2-6) Comparative Example 4
X-ray CT imaging was performed on a pad in which a drawn yarn made of the same X-ray contrast yarn as in Comparative Example 1 was welded to the uppermost nonwoven fabric without sewing the six nonwoven fabrics. X-ray CT images are shown in FIGS.
Moreover, the tension test was done using the said pad.

(2-7) Evaluation of X-ray CT image In Comparative Example 2 using a conventional X-ray contrast yarn as the drawn-out yarn, as shown in FIG. 9B, the drawn-out yarn is almost the portion other than the PET sewing yarn. It was confirmed that it had melted uniformly.

  On the other hand, in Example 2 using the drawn yarn made of braided cord, as shown in FIG. 7B, the amount of penetration is small even in portions other than the PET sewing yarn. This is presumably because the PP filaments are completely dissolved in the nonwoven fabric, and part or all of the PET coated yarn having a higher melting point than PP remains without being melted. In addition to this, it is considered that the tensile strength of the drawn yarn of Example 2 was higher than that of Comparative Example 2, as will be described later, by combining the drawn yarn with the PET sewing yarn.

  Further, in Comparative Example 4 using a conventional X-ray contrast yarn as the drawn yarn, it was confirmed that the drawn yarn was uniformly melted as shown in FIG. 10B.

  On the other hand, in Example 4 using the drawn yarn made of braid, as shown in FIG. 8 (b), the amount of the drawn yarn melted compared to that of Comparative Example 4 (FIG. 10 (b)) for the same reason as described above. Less.

(2-8) Results of tensile test Each test result is shown in FIG. In FIG. 11, in Example 2, the average value of tensile strength was 1006 gf, which was significantly higher than Comparative Example 2 in which the average value of tensile strength was 530 gf. Moreover, in Example 3, the average value of tensile strength was 888 gf, which was significantly higher than that of Comparative Example 3 in which the average value of tensile strength was 665 gf. Thus, it was confirmed that the drawn yarn made of the braid of the present invention was more resistant to pulling than the conventional X-ray contrast yarn.

  Further, comparing Examples 2 and 3, it was found that it is desirable to weld the drawn yarn on the PET yarn in order to further increase the tensile strength. This is considered to be because all the filaments made of PP are melted into the non-woven fabric by welding, and some or all of the coated yarn made of PET having a melting point higher than PP is left undissolved. Furthermore, it was confirmed that the variation in tensile strength was much smaller in Example 2 in which sewing was performed with PET yarn than in Example 3 in which sewing was performed with 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 nonwoven fabric, the braided cord of the present invention and the conventional X-ray contrast yarn were close to each other in terms of tensile strength.

  FIGS. 12A to 12C show photographs after tensile tests according to Examples 2 and 3 and Comparative Example 2, respectively. As can be seen from FIG. 12A, it was confirmed that the sewing thread was partially broken, but the drawn thread was not broken. In FIG. 12B, it was confirmed that the nonwoven fabric was partially broken, but the drawn yarn was not broken. Furthermore, in FIG. 12C, since the PP content of the X-ray contrast yarn is large and the PET content is small, the amount of PP dissolved into the nonwoven fabric is excessive, and the remaining PET is reduced. As a result, the X-ray contrast yarn breaks before the nonwoven fabric breaks. From the above, it was confirmed that the drawn yarn of the present invention did not break both in the sewing with PET yarn and the sewing with cotton yarn.

(3) Pressure distribution test In order to verify the organ protection of the small surgical pad, a test was performed 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 moistened with saline (0.9 w / v%) is placed on the sensor sheet. . A 50 gf / cm ² weight (φ2.5 cm) was placed on the pad in this state, and the pressure distribution was investigated. In addition, the surface pressure distribution measuring system I-SCAN (made by Nitta Corporation) was used for the pressure test.

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

  14 (a) is a photograph showing a small surgical pad of Example 5 (the same as FIG. 1), and FIGS. 14 (b) to 14 (h) are photographs showing small pads of Comparative Examples 5 to 11, respectively. is there. Table 1 shows the thickness in the wet state, the joining method between the drawn yarn and the pad, and the X-ray contrast properties of the small pads of Example 5 and Comparative Examples 5 to 11. Regarding the X-ray contrast properties in Table 1, “pinned between pads” means that the X-ray contrast yarn is sandwiched between pads, and “welded to the pad” means that the X-ray contrast yarn is on the surface of the pad. It means the one that is welded to.

15 (a) and 15 (b) are pressure distribution diagrams of Example 5, FIGS. 15 (c) and 15 (d) are pressure distribution diagrams of Comparative Example 5, and FIGS. 15 (e) and 15 (f) are diagrams. 10 is a pressure distribution diagram of Comparative Example 6. FIG. 16 (a) and 16 (b) are pressure distribution diagrams of Comparative Example 7, and FIGS. 16 (c) and 16 (d) are pressure distribution diagrams of Comparative Example 8, and FIGS. ) Is a pressure distribution diagram of Comparative Example 9. 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 raw fabric portion in FIGS. 15 to 17 shows the pressure distribution when pressure is applied to the center portion of the pad, and the joint portion in the figure is when pressure is applied to the joint portion between the pad and the drawn yarn. The pressure distribution is shown. In any of the above figures, the unit of the pressure numerical value is kgf / cm ² .

  As shown in FIGS. 15A and 15B, it was confirmed that the pressure was uniformly distributed in the small pad of the present invention. In particular, the pressure distribution in FIG. 15 (b) is uniform because the small pad of the present invention has only one side (not penetrated as in the case of sewing) due to welding of the drawn thread and the pad. . In addition, since the small pad of the present invention is bulky, it is considered that the steric hindrance of the welded portion of the drawn yarn is alleviated by the bulk of the pad. From the above, it is considered that the joint surface and the opposite side surface of the drawn-out thread of the small pad of the present invention do not exert a load on the organ.

  On the other hand, with respect to the small pad of Comparative Example 5, as shown in FIGS. 15C and 15D, a pressure concentration region was confirmed in a horizontal line shape. It is considered that the X-ray contrast yarn and the drawn yarn sandwiched between the pads became steric hindrance and the pressure distribution was concentrated.

  Further, as shown in FIGS. 15 (e) and 15 (f), in the small pad of Comparative Example 6, the pressure concentration region as in Comparative Example 5 was not confirmed, but due to the configuration in which the drawn yarn and the pad are welded. Thus, it was confirmed that a relatively high pressure distribution exists particularly in the lower part of FIG.

  Next, as shown in FIGS. 16A and 16B, in the small pad of Comparative Example 7, as in Comparative Example 5, a pressure concentration region was confirmed in a horizontal line shape. It is considered that the pressure distribution was concentrated because the X-ray contrast yarn sandwiched between the pads and the drawn yarn sewn on the pads became a steric hindrance in addition to the thin pad thickness.

  Subsequently, for the small pad of Comparative Example 8, since the thickness in the wet state was thin, pressure concentration regions were confirmed in the upper part and the lower part in FIG. Further, since the drawn thread is sewn on the pad, a horizontal line-shaped pressure concentration region was also confirmed at the joint as shown in FIG.

  Moreover, since the small pad of the comparative example 9 was also thin in the wet state, a pressure concentration region was confirmed from the central portion to the upper portion in FIG. Further, since the X-ray contrast thread is welded in the horizontal direction and the drawn thread is sewn to the pad (the suture thread is in the vertical direction), as shown in FIG. A region (T-shaped) was confirmed.

  Furthermore, the small pad of Comparative Example 10 has a larger wet thickness than the small pad of Comparative Example 9, so that the pressure distribution in the raw fabric portion is larger than that of Comparative Example 9 as shown in FIG. It can be seen that it has been relaxed. However, since the X-ray contrast thread is welded in the horizontal direction and the drawn thread is sewn to the pad (the suture thread is in the vertical direction), as shown in FIG. A region (T-shaped) was confirmed.

  Further, although the small pad of Comparative Example 11 is thick in the wet state, two X-ray contrast yarns are welded to the pad, and the drawn yarn is extended from one end side to the other end side in the pad length direction. As a result, the pressure concentration region having a substantially rectangular shape was confirmed in FIG.

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

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

  The drawn yarn 3 used for the vascular tape 20 is preferably a multifilament having a fineness of 300 dtex. Moreover, it is preferable that the width | variety of the vascular tape 20 is 2-6 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 vascular tape 20, by using the drawn-out thread 3, it is possible to prevent the vascular tape from damaging an organ or the like while having an X-ray contrast function. Moreover, in the vascular tape 20, since the draw-out thread 3 to be used is a braid, it can have sufficient strength and flexibility.

Further, the drawn yarn 3 is preferably an even-numbered round set when used for the small surgical pad 10, and is preferably an odd-numbered flat set when used for the vascular tape 20.
In the blood vessel tape 20, the usability can be improved by making the drawn yarn 3 into an odd-numbered flat group.

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

  The surgical thread, the small surgical pad and the vascular tape using the thread of the present invention are effectively used for various operations such as endoscopic surgery and open surgery (including cardiovascular surgery and thoracic 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 pad 20 Vascular tape

Claims (4)

It is a method for manufacturing a small surgical pad in which a drawn thread (3) is welded to one end of one side of the absorbent pad body (1) ,
Forming a drawn yarn (3) with a plurality of covered yarns (4) in which a PET coating fiber is wound around a core yarn made of a PP filament containing an X- ray impermeable substance ;
To ensure flexibility of the pull date (3) of the tensile strength to increase and at the same time absorbent pad body (1), the length of the welded portion of the lead thread (3) (L) is located in 3~10mm And the manufacturing method of the small pad for surgery characterized by including the process of welding PP so that it may become a structure which does not weld all or a part of PET .   The manufacturing method of the small pad for surgery of Claim 1 with which the absorptive pad main body (1) is sewn on the substantially center part of the width direction with the sewing thread over the length direction.   The method for manufacturing a small surgical pad according to claim 1 or 2, wherein the drawn thread (3) is combined with a sewing thread. Intake Osamusei lead thread on one side of one end of the pad main body (1) (3) is a small pad surgery welded, lead thread (3) from a PP filaments containing X-ray non-transmission made materials The core yarn is composed of a plurality of covered yarns (4) in which PET coated fibers are wound, and the length (L) of the welded portion of the drawn yarn (3) is 3 to 10 mm. A small surgical pad that is welded and has a structure in which all or part of the PET is not welded to increase the tensile strength of the drawn yarn (3) while ensuring the flexibility of the absorbent pad body (1).