JP7330924B2 - hemostatic device - Google Patents

Description

The present invention relates to hemostatic devices.

2. Description of the Related Art Conventionally, there has been known a technique of introducing various medical elongated bodies (for example, catheters) into a blood vessel through a puncture site formed in a limb such as a patient's hand or arm to treat or treat a lesion site. ing. When such a procedure is performed, the operator stops bleeding at the puncture site when removing the medical elongated body from the puncture site.

As a hemostatic device used to stop bleeding at the puncture site, a fixing member having a band wrapped around the limb, and an expanding balloon or the like that is connected to the band and expands by injecting fluid to press the puncture site. A member has been proposed (see Patent Document 1).

JP 2010-131296 A

The hemostatic instrument of Patent Literature 1 is used, for example, in the following procedure.

An operator or the like places a balloon at the puncture site when removing the medical elongated body from the puncture site formed in the limb of the patient. The operator or the like fixes the hemostatic device to the limb of the patient while the balloon is placed at the puncture site. The operator or the like removes the medical elongate body from the puncture site while the hemostatic device is attached to the limb. At this time, the operator may withdraw the medical elongate body from the puncture site before injecting the fluid into the balloon, or remove the medical elongate body from the puncture site while injecting the fluid into the balloon. It may be withdrawn, or the medical strip may be withdrawn from the puncture site after injecting a small amount into the balloon to expand it. After removing the medical elongated body, the operator or the like injects fluid into the balloon to further expand it, thereby applying pressure to the puncture site.

In the above usage procedure, the elongated medical body is removed from the puncture site while the balloon is placed at the puncture site. Therefore, when bleeding occurs from the puncture site, the bleeding blood may stay between the balloon and the skin surface layer around the puncture site. If blood remains between the balloon and the body surface around the puncture site, the visibility of the puncture site is reduced, making it difficult for the operator or the like to check the hemostatic state of the puncture site.

The present invention has been made in view of the above problems, and is convenient in that it is possible to prevent blood from remaining between the expansion member and the puncture site, and that an operator or the like can easily check the state of hemostasis at the puncture site. To provide a hemostatic instrument excellent in performance.

A hemostatic device that achieves the above object comprises an expansion member configured to be placed at a site of a limb to stop bleeding, and a fixing member configured to fix the expansion member to the limb, wherein the expansion member comprises: The member has a first region and a second region having a higher hydrophilicity than the first region on a surface to be arranged at the site to stop bleeding, and the second region is more hydrophilic than the first region. It is a groove part recessed on the outer surface side, and the groove part is provided with a hydrophilic coating layer.

According to the hemostatic device configured as described above, when the extended member is arranged at the puncture site and the hemostatic device is attached to the limb of the patient, when the elongated body for medical use is removed from the puncture site, the puncture site Even if bleeding occurs, the blood can be guided to the periphery of the surface of the expansion member along the groove provided with the hydrophilic coating layer. Therefore, the above-described hemostatic device can suppress accumulation of bleeding blood between the first region of the expansion member and the skin surface layer around the puncture site, and the first region of the expansion member placed at the puncture site can be visually recognized. can maintain sexuality. As a result, convenience is improved when an operator or the like uses the hemostatic instrument.

FIG. 4 is a diagram showing the hemostatic device according to the embodiment, and is a plan view seen from the inner surface side of the belt portion of the fixing member. Figure 2A is a cross-sectional view of the hemostatic device taken along arrows 2A-2A shown in Figure 1; 3A is an enlarged view of the portion 3A shown in FIG. 2; FIG. 4A is a plan view of the first surface of the expansion member viewed in the direction of arrow 4A shown in FIG. 2; FIG. 5A is a cross-sectional view taken along the line of arrows 5A-5A shown in FIG. 4; FIG. 6A is a cross-sectional view along the line of arrows 6A-6A shown in FIG. 4; FIG. It is a figure which shows the mode at the time of mounting|wearing a limb of a patient with the hemostatic instrument which concerns on embodiment. FIG. 11 is a plan view showing a second region according to modification 1; FIG. 11 is a plan view showing a second region according to modification 2;

Hereinafter, embodiments and modifications of the present invention will be described with reference to the attached drawings. It should be noted that the following description does not limit the technical scope or the meaning of terms described in the claims. Also, the dimensional ratios in the drawings are exaggerated for convenience of explanation, and may differ from the actual ratios.

1 to 6 are diagrams for explaining a hemostatic device 100 according to an embodiment, and FIG. 7 is a diagram showing a state in which the hemostatic device 100 is attached to a patient's forearm (corresponding to a "limb") A. .

<Hemostasis device>
The hemostatic device 100, as shown in FIG. 7, is a puncture site ("site to stop bleeding") formed in the forearm A for the purpose of inserting a catheter or the like for treatment or examination into a blood vessel (for example, radial artery). ”) is configured as a medical device for stopping bleeding at the puncture site p when removing the sheath tube of the introducer that has been indwelled at p.

The hemostatic device 100, generally described with reference to FIGS. and a securing member 170 configured to:

<Fixing member>
As shown in FIGS. 1, 2, and 4, the fixing member 170 includes a belt portion 171 configured to be wrapped around the patient's forearm A, and connecting portions 172a and 172b arranged on the belt portion 171. Prepare.

FIG. 1 shows a plan view of the hemostatic device 100 viewed from the inner surface 171a side of the belt portion 171. As shown in FIG. The inner surface 171a of the belt portion 171 is the surface that faces the surface layer of the skin of the forearm A of the patient when the hemostatic device 100 is attached to the forearm A of the patient. An outer surface 171b (see FIG. 3) of the belt portion 171 is the surface opposite to the inner surface 171a.

The belt portion 171 can be made of, for example, a flexible member. Examples of the material forming the belt portion 171 include polyvinyl chloride, polyethylene, polypropylene, polybutadiene, polyolefins such as ethylene-vinyl acetate copolymer (EVA), polyethylene terephthalate (PET), and polybutylene terephthalate (PBT). Various thermoplastic elastomers such as polyesters, polyvinylidene chloride, silicones, polyurethanes, polyamide elastomers, polyurethane elastomers, polyester elastomers, or any combination thereof (blend resins, polymer alloys, laminates, etc.) can be used. can.

As shown in FIG. 1, the first connecting portion 172a is arranged near one end portion 173a of the belt portion 171 in the longitudinal direction. Also, the first connecting portion 172 a is arranged on the inner surface 171 a of the belt portion 171 . 1, 2 and 4, the longitudinal direction of the belt portion 171 is indicated by arrows X1-X2.

The second connecting portion 172b is arranged near the other end portion 173b of the belt portion 171 in the longitudinal direction. The second connecting portion 172b is arranged on the outer surface 171b of the belt portion 171. As shown in FIG.

The first connecting portion 172a and the second connecting portion 172b are configured to be detachable from each other. Each connection part 172a, 172b can be configured by, for example, a hook-and-loop fastener. In this embodiment, the first connecting portion 172a is composed of the female side of the hook-and-loop fastener, and the second connecting portion 172b is composed of the male side of the hook-and-loop fastener.

When the operator or the like attaches the hemostatic device 100 to the forearm A of the patient, the inner surface 171a side of the belt portion 171 to which the expansion member 110 is connected faces the surface layer of the skin of the forearm A of the patient. Wrap portion 171 around forearm A of the patient. The operator or the like wraps the belt portion 171 around the forearm A of the patient, and brings the connecting portions 172a and 172b arranged on the belt portion 171 into contact with each other to connect them. The operator or the like can fix the hemostatic device 100 to the patient's forearm A with the expansion member 110 arranged at the puncture site p by connecting the connecting portions 172a and 172b.

The structure of each connecting portion 172a, 172b is not particularly limited as long as the hemostatic device 100 can be maintained attached to the forearm A of the patient. Each connecting part 172a, 172b may be composed of, for example, other than hook-and-loop fasteners. Further, even when the respective connecting portions 172a and 172b are configured with hook-and-loop fasteners as in this embodiment, the female side and the male side can be interchanged arbitrarily. Further, the positions of the connecting portions 172a and 172b on the belt portion 171, the number of connecting portions, and the like are not particularly limited.

As shown in FIG. 2, the belt portion 171 is provided with a support portion 175 . The support portion 175 has a holding member 175 a arranged near the center of the belt portion 171 in the longitudinal direction, and a support plate 175 b held between the holding member 175 a and the belt portion 171 .

The holding member 175 a is connected to the outer surface 171 b of the belt portion 171 . The holding member 175a forms a gap between the outer surface 171b of the belt portion 171 and the support plate 175b so as to hold the support plate 175b. The support plate 175b includes a flat portion formed at least partially in the longitudinal direction (the vertical direction in FIG. 2) of the support plate 175b, and a curved portion concavely curved toward the inner surface 171a of the belt portion 171. have. The support plate 175b can be made of a material harder than the belt portion 171, for example. Note that the specific cross-sectional shape, material, and the like of the support plate 175b are not particularly limited.

The support plate 175b prevents the expansion member 110 from expanding away from the forearm A of the patient when the expansion member 110 is expanded. Therefore, the hemostatic device 100 can concentrate the compressive force on the patient's forearm A to which the expansion member 110 is fixed when the expansion member 110 is expanded.

The belt portion 171, the holding member 175a, and the support plate 175b are arranged so that the marker portion 125 (see FIGS. 2 and 3), which will be described later, can be seen when the operator or the like views the expansion member 110 from the outer surface 171b side of the belt portion 171. In order to make it visible, it is preferable to configure it with transparent, translucent, colored transparent, or the like.

<Expansion member>
Expansion member 110 comprises a balloon that is expanded by injection of fluid. Expansion member 110 has an interior space 113 into which fluid can be injected, as shown in FIG.

The first surface 111a of the expansion member 110 is provided with a first region 120 and a second region 130, which will be described later (see FIG. 4). The first surface 111a of the expansion member 110 is the outer surface of the surface that is arranged at the puncture site p formed on the forearm A when the expansion member 110 is arranged on the forearm A of the patient.

As shown in FIGS. 2 and 3, the second surface 111b of the expansion member 110 is connected to a deformable auxiliary member 180 having an outer shape smaller than that of the expansion member 110. As shown in FIG. Auxiliary member 180 comprises a balloon that is expanded by injection of fluid. The second surface 111b of the expansion member 110 is the outer surface of the surface opposite to the first surface 111a.

The auxiliary member 180 has an internal space 181 into which fluid can be injected. A first surface 181 a of the auxiliary member 180 located on the expansion member 110 side is connected to a second surface 111 b of the expansion member 110 . A second surface 181 b of the auxiliary member 180 opposite to the first surface 181 a is connected to the inner surface 171 a of the belt portion 171 .

For example, as shown in FIG. 2, the auxiliary member 180 can be arranged at an arbitrary position near the other end 173b in the longitudinal direction of the belt portion 171. As shown in FIG. The auxiliary member 180 is connected to the belt portion 171 near the end of the auxiliary member 180 (the right end in FIG. 3).

As shown in FIG. 3 , the internal space 113 of the expansion member 110 and the internal space 183 of the auxiliary member 180 communicate with each other via the communicating portion 190 . The communicating portion 190 is composed of a hole formed in the expansion member 110 and a hole formed in the auxiliary member 180 .

The expansion member 110 is connected with the auxiliary member 180 around the communicating portion 190 . Also, the auxiliary member 180 is connected to the belt portion 171 as described above. Therefore, the expansion member 110 is connected to the belt portion 171 via the auxiliary member 180 . Each of the auxiliary member 180 and the belt portion 171 and the extension member 110 and the auxiliary member 180 can be connected by fusion or adhesive, for example.

The expansion member 110 and the auxiliary member 180 are formed, for example, in a state in which internal spaces 113 and 183 are formed between the two sheet-shaped members formed in a substantially rectangular shape, and the outer peripheral edge portions of the two sheet-shaped members are formed. It can be formed by joining. In this embodiment, the first surface 111a of the expansion member 110 is composed of a rectangular sheet member as shown in FIG. Note that the expansion member 110 and the auxiliary member 180 are not particularly limited in specific shape and structure as long as they are configured to be expandable and contractible along with injection and discharge of fluid.

As the constituent material of the expansion member 110 and the auxiliary member 180, for example, the same material as the material of the belt portion 171 can be used.

The expansion member 110 and the auxiliary member 180 can have, for example, a substantially rectangular outer shape in plan view. However, specific outer shapes of the expansion member 110 and the auxiliary member 180 are not particularly limited.

An internal space 113 of the expansion member 110 communicates with a lumen of a tube 203 provided in an injection section 200 (see FIG. 1), which will be described later. Note that the tube 203 may be connected to the internal space 183 of the auxiliary member 180 .

An operator or the like injects fluid (for example, air) into the internal space 113 of the expansion member 110 through the tube 203 to expand the expansion member 110 and the auxiliary member 180 .

The operator or the like can apply pressure to the puncture site p by expanding the expansion member 110 while the hemostatic device 100 is attached to the patient's forearm A (see FIG. 7). Further, when the operator or the like expands the auxiliary member 180 together with the expansion member 110, the direction of the compressive force applied by the expansion member 110 can be adjusted by the auxiliary member 180 toward the puncture site p. Therefore, the operator or the like can effectively apply pressure from the expansion member 110 to the puncture site p.

In addition, the hemostatic device 100 may not include the auxiliary member 180 . Moreover, even when the hemostatic device 100 includes the auxiliary member 180, the auxiliary member 180 can be composed of, for example, a member other than an expandable and deformable balloon.

<Injection part>
As shown in FIG. 1, the hemostatic device 100 has an injection section 200 for injecting fluid into the expansion member 110 .

The injection part 200 communicates with a connector 201 incorporating a check valve (not shown), a flexible bag part 202 having a space formed therein, and an internal space 113 between the bag part 202 and the expansion member 110 . and a tube 203 for

While the check valve of the connector 201 is closed, communication between the interior of the connector 201 and the interior of the bag portion 202 is blocked. When expanding the expansion member 110, the operator or the like inserts the front tube portion of a syringe (not shown) into the connector 201 to open the check valve. An operator or the like can inject the air in the syringe into the internal space 113 of the expansion member 110 by pushing the plunger of the syringe while the check valve of the connector 201 is open.

An operator or the like can expand the expansion member 110 by injecting air into the internal space 113 of the expansion member 110 . Also, when an operator or the like injects air into the internal space 113 of the expanding member 110 , the air flows into the internal space 183 of the auxiliary member 180 via the communicating portion 190 . Thereby, the operator or the like can expand the auxiliary member 180 . When the operator or the like inflates the expansion member 110 and the auxiliary member 180, the bag portion 202 communicating with the expansion member 110 via the tube 203 is inflated. The operator or the like can confirm that the expansion member 110 and the auxiliary member 180 have expanded by visually confirming that the bag portion 202 is inflated.

When contracting the expansion member 110 and the auxiliary member 180, the operator inserts the tip tube of the syringe into the connector 201 and pulls the plunger of the syringe. An operator or the like can move air from the expansion member 110 and the auxiliary member 180 to the syringe by performing the above operation. When the operator or the like moves air from the expansion member 110 and the auxiliary member 180 to the syringe, the bag portion 202 contracts.

The bag portion 202 can be provided with, for example, an arrow-shaped marker indicating the direction of insertion of the syringe into the connector 201 .

<First Region and Second Region of Expansion Member>
As shown in FIGS. 3 and 4 , the expansion member 110 has a first region 120 and a second region 130 that is more hydrophilic than the first region 120 . 4 is a plan view of the first surface 111a of the expansion member 110 and the inner surface 171a of the belt portion 171 viewed from the direction of arrow 4A in FIG.

The first region 120 and the second region 130 are provided on the first surface 111 a of the extension member 110 .

As shown in FIGS. 5 and 6, the second region 130 is composed of a groove portion 140 recessed to the outer surface side (the direction away from the puncture site p, the lower side in FIGS. 5 and 6) than the first region 120. are doing. 5 is a cross-sectional view along the line of arrows 5A-5A shown in FIG. 4, and FIG. 6 is a cross-sectional view along the line of arrows 6A-6A shown in FIG.

The groove portion 140 includes a hydrophilic coating layer 163 provided on the surface of the groove portion 140 .

For example, as shown in FIGS. 5 and 6, the groove portion 140 can be formed with a concavely curved cross-sectional shape. The cross-sectional shape of the groove portion 140 is preferably semicircular and U-shaped as shown in FIGS. Accordingly, the groove 140 can reduce blood retention in the groove 140 . However, the cross-sectional shape (for example, depth and width) of the groove 140 is not particularly limited. For example, the guiding portion 143 of the groove portion 140, which will be described later, does not have to have the same cross-sectional shape continuously extending to the peripheral portion 115 of the first surface 111a. As an example, the guiding portion 143 may have a smaller depth or a narrower width as it approaches the peripheral portion 115 of the first surface 111a from the surrounding portion 141 .

As shown in FIGS. 5 and 6, a water-repellent coating layer 162 is arranged in the first region 120 . 2 and 3, illustration of the hydrophilic coating layer 163 and the water-repellent coating layer 162 is omitted.

As shown in FIG. 4, the groove portion 140 includes an enclosing portion 141 surrounding at least a portion of the first region 120, and extending from the enclosing portion 141 toward the peripheral portion 115 of the first surface 111a disposed at the puncture site p. and a guide portion 143 .

As shown in FIGS. 4 and 5, the surrounding portion 141 is a part 121 of the first region 120 located in the center of the expansion member 110 on the first surface 111a of the expansion member 110 (hereinafter referred to as "central portion"). ). The center of the expansion member 110 is the center in plan view shown in FIG.

As shown in FIGS. 4 and 5, the first region 120 has a marker portion 125 in the center portion 121 surrounded by the enclosing portion 141 for aligning the expansion member 110 with the puncture site p. In this embodiment, the marker portion 125 is configured by coloring the water-repellent coating layer 162 arranged in the central portion 121 .

The marker portion 125 can be formed of, for example, a rectangular marker in which the entire marker portion 125 is colored. However, the marker portion 125 may be composed of, for example, a transparent center portion and a colored linear frame portion surrounding the center portion. Note that the specific shape, color, formation method, and the like of the marker portion 125 are not particularly limited. For example, the marker portion 125 may be configured by directly coloring the central portion 121 .

The guiding portion 143 has a plurality of guiding portions (first guiding portion 143 a and second guiding portion 143 b ) extending from the surrounding portion 141 in a direction crossing the longitudinal direction of the belt portion 171 . Also, the second guide portion 143b extends in a direction different from that of the first guide portion 143a. As a result, the hemostatic device 100 has a plurality of guiding portions 143a and 143b directed outward of the belt portion 171, so that the blood flowing into the guiding portion 143 can be efficiently guided outward of the belt portion 171. can be done. As shown in FIG. 4, the guiding portion 143 includes a plurality of first guiding portions 143a extending from the enclosing portion 141 toward the corner portion 117 of the expansion member 110, and perpendicular to the longitudinal direction of the belt portion 171 from the enclosing portion 141. and a plurality of second guide portions 143b extending in the direction (short side direction of the first surface 111a). The corners 117 are vertices of a rectangle when the first surface 111a shown in FIG. 4 has a rectangular planar shape.

In this embodiment, the guiding portion 143 has four first guiding portions 143a that continuously and linearly extend from the enclosing portion 141 toward the four corners of the first surface 111a of the expansion member 110 . Further, the guiding portion 143 has two second guiding portions 143b that continuously and linearly extend along the direction orthogonal to the longitudinal direction of the belt portion 171. As shown in FIG. There are no particular restrictions on the number, direction of extension, and pattern of extension (shapes such as straight lines and curves) of the guide portions 143a and 143b.

Hydrophilic coat layer 163 can be formed using a known material and a known method. As an example, the hydrophilic coating layer 163 can be made of acrylamide-based polymer (eg, block copolymer of polyacrylamide, polyglycidyl methacrylate-dimethylacrylamide (PGMA-DMAA)), polyvinylpyrrolidone, hyaluronic acid, or the like. can. The hydrophilic coat layer 163 may be provided on at least part of the second region 130 (groove portion 140). Moreover, there is no particular limitation on the thickness of the hydrophilic coating layer 163 .

The water-repellent coating layer 162 can be formed using a known material and a known method. As an example, the water-repellent coating layer 162 can be made of silicone, polytetrafluoroethylene (PTFE), or the like. Note that the water-repellent coating layer 162 may be provided on at least part of the first region 120 . Also, the thickness of the water-repellent coating layer 162 is not particularly limited.

FIG. 7 shows a state in which the hemostatic device 100 is attached to the patient's forearm A on which the puncture site p is formed.

Although illustration of the introducer is omitted in FIG. 7, the operator or the like can place the expansion member 110 at the puncture site p while inserting the sheath tube of the introducer into the puncture site p. Further, the operator or the like can remove the sheath tube from the puncture site p while the hemostatic device 100 is attached to the forearm A of the patient.

When the operator or the like arranges the expansion member 110 at the puncture site p, the marker part 125 arranged at the center part 121 of the first region 120 is used as a guide to align the center part 121 with the puncture site p. Thereby, the operator or the like can easily arrange the center portion 121 of the first region 120 where the groove portion 140 is not formed at the puncture site p.

The operator or the like removes the sheath tube from the puncture site p while the expansion member 110 is arranged at the puncture site p. At this time, bleeding may occur from the puncture site p depending on the condition of the puncture site p of the patient. In such a case, bleeding occurs while the first surface 111 a of the expansion member 110 is in contact with the puncture site p, so blood moves along the groove 140 of the second region 130 to the peripheral edge 115 of the expansion member 110 . Hemostasis device 100 has hydrophilic coating layer 163 arranged in groove 140, so that blood that has flowed into groove 140 can be smoothly guided toward peripheral edge 115 of first surface 111a.

In this embodiment, the first guiding portion 143a extends from the enclosing portion 141 toward the corner portion 117 of the expansion member 110, and the second guiding portion 143b extends from the enclosing portion 141 in the longitudinal direction of the belt portion 171. It extends in a direction perpendicular to the direction. Therefore, in the present embodiment, the blood in contact with the first surface 111a of the expansion member 110 is guided to the position adjacent to the expansion member 110 in the longitudinal direction of the belt portion 171 (the short side of the first surface 111a in plan view). can prevent it from being done. Therefore, even if bleeding occurs from the puncture site p while the hemostatic device 100 is attached to the patient's forearm A, the blood flows along the belt portion 171 wrapped around the patient's forearm A, and the patient's body, etc. Contamination can be prevented. As the expansion member 110 of the hemostatic device 100 expands, the expansion member 110 swells in the direction away from the forearm A of the patient. is efficiently guided to the outside of the expansion member 110 via the .

In addition, in the present embodiment, since the first region 120 is provided with the water-repellent coating layer 162 , blood that has come into contact with the first region 120 can be easily moved from the first region 120 to the second region 130 . can. Therefore, it is possible to prevent the visibility of the first region 120 of the expansion member 110 from deteriorating. In particular, in the present embodiment, since the portion (central portion 121) provided with the marker portion 125 for positioning the expansion member 110 with the puncture site p is formed in the first region 120, the central portion 121 is It is possible to prevent the visibility from deteriorating and making it difficult for an operator or the like to see the marker portion 125 visually.

As described above, the hemostatic device 100 according to this embodiment includes the expansion member 110 configured to be placed on the patient's forearm A, and the expansion member 110 configured to be fixed to the patient's forearm A. and a fixing member 170 . The expansion member 110 has a first region 120 and a second region 130 having higher hydrophilicity than the first region 120 on the first surface 111a arranged at the puncture site p. The second region 130 is a groove portion 140 recessed toward the outer surface side of the first region 120 .

According to the hemostatic device 100 configured as described above, the expansion member 110 is arranged at the puncture site p, and the hemostatic device 100 is attached to the patient's forearm A, and the elongated body for medical use (for example, , sheath tube of the introducer) is removed, even if bleeding occurs from the puncture site p, the blood is guided to the peripheral edge portion 115 of the first surface 111a along the groove portion 140 provided with the hydrophilic coating layer 163. be able to. Therefore, hemostatic device 100 can prevent bleeding blood from accumulating between first region 120 of expansion member 110 and the skin surface around puncture site p. The visibility of one area 120 can be maintained. As a result, the hemostatic instrument is improved in convenience when used by an operator or the like.

Also, the first region 120 includes a water-repellent coating layer 162 .

According to the hemostatic device 100 configured as described above, the water-repellent coating layer 162 arranged in the first region 120 smoothly moves blood in contact with the first region 120 from the first region 120 to the second region 130. can be made Therefore, the hemostatic device 100 effectively prevents bleeding blood from staying between the first region 120 of the expansion member 110 and the skin surface around the puncture site p, and reducing the visibility of the first region 120. can do.

In addition, the groove portion 140 includes an enclosing portion 141 that surrounds at least a portion of the first region 120 (for example, the central portion 121), and extends from the enclosing portion 141 toward the peripheral edge portion 115 of the first surface 111a arranged at the puncture site p. and a guiding portion 143 present.

The hemostatic device 100 configured as described above is configured such that a portion of the first region 120 is surrounded by the surrounding portion 141 . Therefore, the hemostatic device 100 can smoothly move the blood in contact with the first region 120 surrounded by the surrounding portion 141 to the peripheral portion 115 of the first surface 111a via the surrounding portion 141 and the guiding portion 143. .

In addition, the surrounding portion 141 surrounds the central portion 121 of the first region 120 located in the center of the expansion member 110 on the first surface 111a arranged at the puncture site p.

According to the hemostatic device 100 configured as described above, the blood in contact with the central portion 121 of the first region 120 located in the center of the expansion member 110 flows through the surrounding portion 141 and the guiding portion 143 to the first surface 111a. can be smoothly moved to the peripheral edge portion 115 of the . Therefore, it is possible to effectively prevent the visibility of the central portion 121 of the first region 120 from deteriorating.

In addition, the first region 120 has a marker portion 125 for alignment with the puncture site p in the central portion 121 surrounded by the enclosing portion 141 .

In the hemostatic device 100 configured as described above, since the enclosing portion 141 surrounds the central portion 121 having the marker portion 125, the bleeding blood stays around the marker portion 125, which reduces the visibility around the puncture site. To prevent. Therefore, the convenience of the hemostatic device 100 is further improved.

The securing member 170 also has a belt portion 171 configured to wrap around the forearm A of the patient. The guiding portion 143 has a first guiding portion 143a and a second guiding portion 143b extending from the enclosing portion 141 in a direction crossing the longitudinal direction of the belt portion 171. As shown in FIG. The second guide portion 143b extends in a direction different from that of the first guide portion 143a.

In the hemostatic device 100 configured as described above, the blood in contact with the first surface 111a of the expansion member 110 flows through the belt portion 171 via the plurality of guide portions (the first guide portion 143a and the second guide portion 143b). It is configured to be efficiently guided in the lateral direction (the direction in which the patient's forearm A extends). Therefore, even if blood leaks from the puncture site p while the hemostatic device 100 is attached to the patient's forearm A, the blood flows along the belt portion 171 wrapped around the patient's forearm A, causing the patient's body to bleed. etc. can be prevented from being contaminated.

In addition, the guiding portion 143 includes a first guiding portion 143a extending from the enclosing portion 141 toward the corner portion 117 of the first surface 111a and a second guiding portion 143a extending from the enclosing portion 141 in a direction orthogonal to the longitudinal direction of the belt portion 171. and a guide portion 143b.

According to the hemostatic device 100 configured as described above, the first guide portion 143a and the second guide portion 143b on the first surface 111a of the expansion member 110 can be configured so as not to cross each other. As a result, in the hemostatic device 100, the blood in contact with the first surface 111a of the expansion member 110 flows through the first guiding portion 143a and the second guiding portion 143b in the outward direction of the belt portion 171 (the patient's forearm A). extending direction). Therefore, the hemostatic device 100 can prevent blood in contact with the first surface 111 a of the expansion member 110 from being guided to a position adjacent to the expansion member 110 in the longitudinal direction of the belt portion 171 . Therefore, even if blood leaks from the puncture site p while the hemostatic device 100 is attached to the patient's forearm A, the blood flows along the belt portion 171 wrapped around the patient's forearm A, causing the patient's body to bleed. etc. can be prevented from being contaminated.

Next, each modification of the embodiment described above will be described. In the explanation of the modified example, the explanation of the content that overlaps with the content that has already been explained in the above-described embodiment will be omitted. Also, in the description of the modified example, the contents that are not particularly described can be the same as those of the above-described embodiment.

(Modification 1 of second region (groove))
A second region 130A according to Modification 1 shown in FIG. A portion 143c is provided. In the second region 130A configured in this manner, the blood in contact with the first region 120 flows through the groove 140 of the second region 130 to the first surface 111a in the same manner as the second region 130 according to the above-described embodiment. It can be suitably guided to the peripheral portion 115 .

(Modification 2 of second region (groove))
In a second region 130B according to Modification 2 shown in FIG. 9, a guide portion 143 has a plurality of fourth guide portions 143d and 145e extending perpendicular to each other on the first surface 111a.

As shown in this modified example, the grooves 140 of the second region 130B can also be arranged in a lattice pattern on the first surface 111a. Modification 2 is configured to increase the area ratio of second region 130 in first surface 111a compared to Modification 1 by arranging grooves 140 in a lattice pattern on first surface 111a. . Therefore, blood can be more effectively guided to the peripheral portion 115 of the first surface 111a. Note that the area of the first region on the first surface is preferably larger than the area of the second region on the first surface from the viewpoint of ensuring sufficient visibility of the expansion member.

In addition, as shown in FIG. 9, the guide portions 143d and 143e orthogonal to each other with respect to the enclosing portion 141 can be formed, for example, wider and deeper than the other guide portions. With this configuration, blood that has flowed into enclosing portion 141 can be efficiently moved toward peripheral portion 115 of first surface 111a.

As described in Modifications 1 and 2, the pattern of forming the second regions 130 (grooves 140) on the first surface 111a of the expansion member 110 allows the blood in contact with the first surface 111a to flow through the second regions 130. is not particularly limited as long as it can be moved to the peripheral edge portion 115 of the first surface 111a.

Although the hemostatic device according to the present invention has been described above through the embodiments and modifications, the present invention is not limited to the contents described in the specification, and can be appropriately modified based on the description of the claims. is possible.

As long as the hemostatic device has a structure including an expansion member (for example, a balloon) having a first region and a second region, there are no particular restrictions on the limb to be hemostatic or the specific hemostatic method. In the description of the embodiments, the hemostatic device for stopping bleeding at the puncture site formed on the right forearm of the patient was exemplified, but the hemostatic device can also be configured to stop bleeding at the puncture site formed on the left forearm. be. In addition, the hemostatic device is used on the radial artery side of the palmar artery (deep palmar artery) that runs on the back of the hand and on the palm side of the hand located on the finger side of the patient's forearm (for example, the artery around the anatomical snuff box, Alternatively, the puncture site formed in the distal radial artery running on the fingertip side of the snuff box may be configured to stop bleeding.

In addition, the shape, size, structure, etc. of each part of the hemostatic device are such that, with the hemostatic device attached to at least a part of the limb including the forearm and hand, the expansion member applies pressure to the puncture site. It is not particularly limited as long as possible.

100 Hemostasis Device 110 Expansion Member 111a First Surface of Expansion Member 111b Second Surface of Expansion Member 113 Interior Space of Expansion Member 115 Perimeter of First Surface 117 Corner of First Surface 120 First Region 121 Center of First Region part (part of the first area)
125 marker portions 130, 130A, 130B second region 140 groove portion 141 enclosing portion 143 guide portion 143a first guide portion 143b second guide portion 143c third guide portion 143d, 143e fourth guide portion 162 water-repellent coating layer 163 hydrophilic coat Layer 170 Fixing member 171 Belt portion 180 Auxiliary member 200 Injection portion A Forearm (body)
p Puncture site (site to stop bleeding)

Claims (8)

an expansion member configured to be placed on a limb where bleeding is to be stopped;
a securing member configured to secure the expansion member to the limb;
the expansion member has a first region and a second region having a higher hydrophilicity than the first region on a surface to be arranged at the site to stop bleeding;
The second region is a groove recessed toward the outer surface side from the first region,
A hemostatic device, wherein the groove includes a hydrophilic coating layer. The hemostatic device of claim 1, wherein the first region comprises a water-repellent coating layer. 3. The groove portion has an enclosing portion surrounding at least a portion of the first region, and a guiding portion extending from the enclosing portion toward a peripheral portion of the surface located at the site to stop bleeding. A hemostatic device according to claim 1 or claim 2. 4. The hemostatic device according to claim 3, wherein the surrounding portion surrounds a portion of the first region located in the center of the expansion member on the surface located at the site to be stopped. 5. The hemostatic device according to claim 4, wherein said first region includes a marker portion for positioning with said site to stop bleeding in a portion surrounded by said enclosing portion. The fixing member has a belt portion configured to be wrapped around the limb,
The guide portion has a first guide portion and a second guide portion extending from the enclosing portion in a direction intersecting the longitudinal direction of the belt portion,
The hemostatic device according to any one of claims 3 to 5, wherein the second guide portion extends in a direction different from that of the first guide portion. The guide portion includes the first guide portion extending from the enclosing portion toward the corner portion of the surface located at the site to stop bleeding, and the guide portion extending from the enclosing portion in a direction orthogonal to the longitudinal direction of the belt portion. 7. The hemostatic device of claim 6, comprising said second guide portion extending. The hemostatic device according to any one of claims 3 to 5, wherein the guide portion extends in a grid-like pattern on the surface located at the site to stop bleeding.