hemostatic instruments

Abstract

[Problem] To provide a hemostasis instrument that can effectively apply a compression force to a puncture site while reducing the burden on a patient even when stopping bleeding at a puncture site formed at a predetermined location avoiding the metacarpal bone of the index finger of a hand and the metacarpal bone of the thumb of the hand. [Solution] A body section 110 of a hemostasis instrument 10 comprises a support member 300 that is configured so as to overlap with an expansion member 210 and formed from a material more rigid than that of the expansion member. The support member is positioned on a first strip section 410 side and includes an upper end 301 forming an end of the support member 300, a lower end 302 forming an end on the opposite side from the upper end, and side surface sections 303, 304 connecting the upper end and the lower end. The support member is configured so that the width w1 thereof becomes shorter from the upper end toward the lower end and the thickness t1 of the side surface sections becomes thinner from the upper end toward the lower end. The lower end has a linear flat section 302a in a planar view, and the outer surface 300b of the support member is curved toward a second strip section side and a third strip section side.

Description

Technical Field

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[0001] The present invention relates to a hemostatic device.

Background Art

[0002] As one of the catheter procedures, a procedure is known in which various medical long bodies are introduced into a blood vessel through a puncture site formed by puncturing a blood vessel in a limb such as the arm or hand of a patient, and diagnosis and treatment of a lesion site are performed. For example, Patent Document 1 discloses a hemostatic device for stopping bleeding at a puncture site formed to enable access to a blood vessel (including the distal radial artery) that runs through the hand.

[0003] The hemostatic device of Patent Document 1 includes a pressing member that applies a pressing force to a puncture site (hereinafter, also simply referred to as "puncture site") formed on the hand of a patient, a plurality of belt portions for fixing the pressing member to the hand of the patient, and a support member that presses the pressing member against the hand of the patient. Further, the plurality of belt portions include a first belt portion disposed between the fingers of the patient's hand and second and third belt portions wound around a predetermined position on the forearm side of the patient's hand.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] When forming a puncture site on the hand, an operator such as a doctor (hereinafter, referred to as "operator") may set the puncture site at a predetermined position avoiding the middle phalanges of the index finger and the thumb of the hand. By setting the puncture site at such a predetermined position, the operator can prevent a puncture instrument such as an indwelling needle from interfering with the middle phalanges of each finger when forming the puncture site.

[0006] However, when a puncture site is formed at a predetermined location avoiding the metacarpal bones of the index finger and thumb, the following problems arise when hemostasis is performed using the hemostatic device described in Patent Document 1.

[0007] When the surgeon attempts to stop bleeding at a puncture site, they position the pressing member and support member of the hemostatic device described in Patent Document 1 so that they overlap the puncture site. When the surgeon places the hemostatic device described in Patent Document 1 on the patient's hand, the support member may end up resting on the metacarpal bones of the index finger and thumb. With the hemostatic device described in Patent Document 1, if the support member is placed on the patient's hand as described above and the second and third bands are wrapped around the patient's hand, a gap is created between the pressing member and the hand, and the second and third bands no longer fit along the outer circumference of the patient's hand. When the hemostatic device is attached to the patient's hand in this way, the surgeon can firmly fix the pressing member and support member to the patient's hand by tightening the first band between the fingers. On the other hand, if the surgeon tightens the first band too tightly between the fingers, the patient may feel pain. Therefore, when using the hemostatic device described in Patent Document 1, if the patient is unable to tighten the first band portion strongly due to pain or other reasons, the support member will be positioned in a state where it is inclined from the fingertip side toward the forearm side, approaching the surface of the hand.

[0008] When using the hemostatic device described in Patent Document 1 to stop bleeding, if the support member is positioned as described above, the pressing member will not be able to apply compressive force perpendicular to the puncture site. As a result, the hemostatic device described in Patent Document 1 will not be able to effectively apply compressive force to the puncture site.

[0009] In order to solve the above problems, the inventors of the present invention considered modifying the shape of the support member of the hemostatic device. As a result, the inventors found that by configuring the support member so that its width decreases from the upper end located on the finger side to the lower end located on the forearm side, the support member can be positioned along the metacarpal bones of the index finger and the thumb. By providing a support member formed in the above shape, the hemostatic device can be positioned stably on the hand.

[0010] Furthermore, the inventors have found that when the support member is configured such that its thickness decreases from the upper end to the lower end, the support member can be positioned approximately parallel to the surface of the hand by tightening the first band portion extending from the upper end of the support member between the fingers with an appropriate tightening force. By providing a support member formed in the shape described above, the hemostatic device can apply a compressive force to the pressing member in a direction approximately perpendicular to the puncture site. Therefore, the hemostatic device can effectively apply a compressive force to the puncture site with its pressing member.

[0011] Based on the above-mentioned findings, the inventors have discovered that by further modifying the shape of the support member, it is possible to more effectively reduce the burden on the patient while the pressing member is applying compressive force to the puncture site, while also enabling the pressing member to apply compressive force to the puncture site more effectively.

[0012] The present invention aims to provide a hemostatic device that can effectively apply compressive force to a puncture site while reducing the burden on the patient, even when stopping bleeding at a puncture site formed in a predetermined position that avoids the metacarpal bones of the index finger and the thumb. [Means for solving the problem]

[0013] The hemostatic device according to the present invention comprises a cover member configured to cover a puncture site formed on a patient, and a pressing member connected to the cover member and configured to compress the puncture site, wherein the cover member comprises a main body portion on which the pressing member is located, a first band portion configured to be positioned between the fingers of the patient and extending in a first direction from the main body portion, a second band portion extending in a second direction different from the first direction from the main body portion, and a third band portion facing the second band portion with the pressing member in between and extending in a third direction different from the first and second directions from the main body portion, wherein the main body portion is connected to the pressing member The support member is made of a harder material and is configured to overlap with the pressing member. The support member is located on the side of the first band and has an upper end that forms the end of the support member, a lower end that forms the end opposite to the upper end, and a side portion that connects the upper end and the lower end. The width of the support member decreases from the upper end to the lower end, and the thickness of the side portion decreases from the upper end to the lower end. The lower end has a straight, flat portion in plan view, and the outer surface of the support member is curved toward the side of the second band and the side of the third band. [Effects of the Invention]

[0014] The hemostatic device described above has a support member made of a harder material than the pressing member. The support member is positioned to cover the puncture site together with the pressing member when stopping bleeding at a predetermined location that avoids the metacarpal bones of the patient's index finger and thumb. The support member prevents the pressing member from lifting away from the patient's hand by pressing it against the patient's hand. The width of the support member decreases from the upper end to the lower end. Therefore, when the support member is placed on the patient's hand, it can be positioned along the metacarpal bones of the index finger and thumb. As a result, the hemostatic device described above can be securely wrapped around the outer circumference of the patient's hand with its second and third band portions. In addition, the thickness of the side portion of the support member decreases from the upper end to the lower end. Furthermore, the first band portion, which is configured to be positioned between the patient's fingers, extends from the upper end of the support member and is configured to press the upper end of the support member against the patient's hand. Therefore, when hemostasis is initiated with the hemostatic device attached to the patient's hand, the pressing member can apply appropriate force to the upper end of the support member. Furthermore, the force applied by the pressing member causes the upper end of the support member to lift. This allows the hemostatic device to position the inner surface of the support member approximately parallel to the surface of the patient's hand. Therefore, by fixing each band portion of the hemostatic device to the patient's hand with the pressing member and support member positioned at the puncture site, the compressive force of the pressing member can be directed perpendicular to the puncture site. This allows the hemostatic device to effectively apply compressive force to the puncture site.

[0015] Furthermore, the above-described hemostatic device has a straight, flat portion at the lower end of the support member when viewed from above. The straight, flat portion at the lower end of the support member prevents the lower end of the support member from digging into the body surface of the patient's wrist or forearm when the patient performs actions such as twisting their wrist towards the back of their hand while the hemostatic device is attached to the patient's hand. Therefore, the above-described hemostatic device can suppress the feeling of pain to the patient even when the patient moves their wrist or other body parts while the pressing member is applying pressure to the puncture site.

[0016] In addition, the outer surface of the support member of the above-mentioned hemostatic device is curved toward the second belt portion side and the third belt portion side. Therefore, when the operator wraps the second belt portion and the third belt portion connected to the main body portion of the cover member along the outer periphery of the patient's hand, the second belt portion and the third belt portion are wound along the curved outer surface of the support member. Thereby, the hemostatic device can enhance the fixing force of the support member and the pressing member with respect to the patient's hand.

Brief Description of the Drawings

[0017] [Figure 1] It is a diagram showing the hemostatic device according to the embodiment, and is a plan view seen from the outer surface side of each belt portion. [Figure 2] It is a diagram showing the hemostatic device according to the embodiment, and is a plan view seen from the inner surface side of each belt portion. [Figure 3] It is a diagram showing an enlarged part of the hemostatic device seen from the outer surface side of the main body portion of the cover member. [Figure 4] It is a diagram showing an enlarged part of the hemostatic device seen from the inner surface side of the main body portion of the cover member. [Figure 5] It is a diagram showing an enlarged part of the hemostatic device seen from the outer surface side of the main body portion of the cover member. [Figure 6] It is a partial cross-sectional view of the hemostatic device along the arrow 6A-6A shown in FIG. 5, and is a diagram showing the state when the expansion portion expands. [Figure 7] It is a partial cross-sectional view of the hemostatic device along the arrow 7A-7A shown in FIG. 5, and is a diagram showing the state when the expansion portion expands. [Figure 8] It is a plan view of the support member. [Figure 9] It is a perspective view of the support member seen from the upper end side. [Figure 10] It is a perspective view of the support member seen from the lower end side. [Figure 11] It is a side view of the support member seen from the direction of the arrow 11A shown in FIG. 8. [Figure 12] It is a front view of the support member seen from the direction of the arrow 12A shown in FIG. 8. [Figure 13]It is a rear view of the support member as seen from the direction of arrow 13A shown in FIG. 8. [Figure 14] It is a perspective view of the support member. [Figure 15] It is a perspective view of the support member. [Figure 16] It is a view showing the hand (right hand) of a patient to whom the hemostatic instrument is to be applied. [Figure 17] It is a view schematically showing an example of use of the hemostatic instrument. [Figure 18] It is a view schematically showing an example of use of the hemostatic instrument. [Figure 19] It is a view schematically showing an example of use of the hemostatic instrument. [Figure 20] It is a partial cross-sectional view along arrow 20A-20A shown in FIG. 19. [Figure 21] It is a partial cross-sectional view along arrow 21A-21A shown in FIG. 19. [Figure 22] [[ID=2,7]]It is a view showing the right hand of a patient wearing the hemostatic instrument. [Figure 23] It is a partial cross-sectional view showing a part of the hemostatic instrument according to a modified example. [Figure 24] It is a partial cross-sectional view showing a part of the hemostatic instrument according to a modified example.

BEST MODE FOR CARRYING OUT THE INVENTION

[0018] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. 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 be different from the actual ratios. The range "X to Y" shown in this specification means "X or more and Y or less".

[0019] FIGS. 1 to 15 are diagrams for explaining the hemostatic instrument 10 according to the embodiment. FIGS. 16 to 22 are diagrams for explaining examples of use of the hemostatic instrument 10 according to the embodiment. <0000A127>

[0020] The hemostatic device 10 can be used, for example, to stop bleeding at the first puncture site p1 when removing the sheath tube 610 of the introducer 600 that was placed at the first puncture site p1 formed on the hand H located distal to the patient's forearm Ar (towards the fingertips), as shown in Figures 16, 19, 20, 21, and 22.

[0021] The specific location of the puncture site targeted for hemostasis by the hemostatic device 10 is not particularly limited, but in this specification, a first puncture site p1 and a second puncture site p2 are given as examples.

[0022] The first puncture site p1 is located in the distal radial artery (hereinafter also referred to as "vascular V1"), which runs along the back of the right hand H1 distal to the forearm Ar of the patient, and is distal to the snuffbox Sb of the palmar artery. As shown in Figures 16, 19, 20, 21, and 22. The first puncture site p1 is located between the metacarpal bone B1 of the index finger and the metacarpal bone B2 of the thumb, and is positioned in a predetermined location that avoids the metacarpal bones B1 of the index finger and B2 of the thumb. The snuffbox Sb is a cavity in the hand located near the radius when the patient extends the thumb of the hand H.

[0023] The second puncture site p2, as shown in Figure 16, is a puncture site formed in artery V2 located in the snuffbox Sb of the palmar artery running along the back of the right hand H1. The second puncture site p2 is located on the Ar side (proximal side) of the patient's forearm than the first puncture site p1, and is situated between the extensor pollicis longus tendon T1 and the extensor pollicis brevis tendon T2 on the back of the patient's right hand H1. Furthermore, the second puncture site p2 is positioned in a predetermined location that avoids the positions of the metacarpal bone B1 of the index finger and the metacarpal bone B2 of the thumb.

[0024] Furthermore, the hemostatic device 10 can also be used to stop bleeding at a puncture site formed on the patient's left hand at a position corresponding to the first puncture site p1 exemplified on the patient's right hand H1, or at a puncture site formed on the patient's left hand at a position corresponding to the second puncture site p2 exemplified on the patient's right hand H1.

[0025] The hemostatic device 10 will be described in detail below.

[0026] <Hemostatic device> The hemostatic device 10, in general terms, includes a cover member 100 configured to cover the first puncture site p1, as shown in Figures 1, 2, 19, 20, 21, and 22, and a pressing member 200 connected to the cover member 100 and configured to compress the first puncture site p1.

[0027] <Pressing member> The pressing member 200 can be configured as an expandable member 210 that can be expanded by fluid injection, for example, as shown in Figures 6 and 7. In this embodiment, an example in which the pressing member 200 is configured as an expandable member 210 will be described below.

[0028] The expansion member 210 has a lumen 210a into which a fluid can be injected. The expansion member 210 is configured to expand when a fluid is injected into the lumen 210a and to contract when the fluid injected into the lumen 210a is discharged. The fluid used to expand the expansion member 210 is, for example, a gas such as air. Figures 6 and 7 show cross-sectional views of the expansion member 210 in its expanded state.

[0029] A tube 283 (see Figures 1 and 2), described later, is connected to the lumen 210a of the expansion member 210.

[0030] As shown in Figures 6 and 7, the extension member 210 can be made of, for example, a membrane-like member (sheet material) connected to the sheet material 120 that constitutes the main body portion 110 of the cover member 100.

[0031] The expansion member 210 can be positioned to form a cavity 210a between itself and the lower surface region 132 of the holding portion 130 formed by the sheet material 120.

[0032] The outer edge of the film-like member constitutes the edge portion 211 of the expansion member 210. The edge portion 211 of the expansion member 210 can be connected to the sheet material 120 by means of, for example, fusion or adhesive bonding.

[0033] The film-like member constituting the expansion member 210 can be made of, for example, a resin material having a predetermined thickness.

[0034] The material of the film-like member constituting the expansion member 210 is not particularly limited, but for example, polyolefins such as polyvinyl chloride, polyethylene, polypropylene, polybutadiene, and ethylene-vinyl acetate copolymer (EVA), polyesters such as polyethylene terephthalate (PET) and polybutylene terephthalate (PBT), polyvinylidene chloride, silicone, polyurethane, polyamide elastomer, polyurethane elastomer, polyester elastomer, nylon, nylon elastomer, or any combination thereof (blended resin, polymer alloy, laminate, etc.) can be used.

[0035] The specific configuration of the expansion member 210 provided by the hemostatic device 10 is not particularly limited. The expansion member 210 may be formed, for example, by joining the edge of one sheet-like member to one sheet-like member while forming a lumen 210a between two sheet-like members. In this case, the expansion member 210 connects the surface of one sheet-like member to the sheet material 120 that constitutes the main body 110 of the cover member 100. Alternatively, the expansion member 210 can be composed of, for example, a single bag-shaped member shaped to have a lumen 210a on its inside. In this case, the expansion member 210 connects a part of the surface of the bag-shaped member to the sheet material 120 that constitutes the main body 110 of the cover member 100.

[0036] As shown in Figures 6 and 7, the extension member 210 is positioned on the inner surface 110a side of the main body portion 110 of the cover member 100.

[0037] In this embodiment, the inner surface 110a of the main body 110 is the surface that is positioned on the body surface side of the hand H in the lower surface area 132 of the holding portion 130 when the hemostatic device 10 is attached to the patient's hand H (see Figures 21 and 22). The outer surface 110b of the main body 110 is the surface that is positioned facing the outside in the upper surface area 131 of the holding portion 130.

[0038] Figure 8 shows the positional relationship between the contracted expansion member 210 and the support member 300 in a plan view. The expansion member 210 is indicated by a dashed line.

[0039] The expansion member 210, in its contracted state, has a vertical width wa passing through the center c1 of the expansion member 210, and a horizontal width wb perpendicular to the vertical width wa and also passing through the center c1 of the expansion member 210. Note that the above-mentioned vertical width wa and horizontal width wb do not include the edge portion 211 located on the outer circumference of the expansion member 210, and refer to the vertical width wa and horizontal width wb of the outer shape of the expansion member 210 as shown in the plan view in Figure 8.

[0040] The center c1 of the extension member 210 is located at the center of the outer shape shown in the plan view of Figure 8. In this embodiment, the center c1 is located at the intersection of the center position of the axis (major axis) along the vertical width wa and the center position of the axis (minor axis) along the horizontal width wb. In this embodiment, the center position of the axis (major axis) along the vertical width wa is a line segment that passes through a point on the axis along the vertical width wa that is equal in distance from both ends of the axis along the vertical width wa. The center position of the axis (minor axis) along the horizontal width wb is a line segment that passes through a point on the axis along the horizontal width wb that is equal in distance from both ends of the axis along the horizontal width wb.

[0041] The extension member 210 has a width wb shorter than its height wa. In this embodiment, the extension member 210 has a roughly oblong shape that is rotationally symmetric with respect to the center c1 in the plan view shown in Figure 8.

[0042] There are no particular restrictions on the planar shape of the extension member 210. The extension member 210 may be configured to have a planar shape such as a circle, ellipse, or rectangle. Even when the extension member 210 is configured to have a planar shape such as a circle, ellipse, or rectangle, the center of the extension member 210 can be defined by the center position of the outer shape in a planar view.

[0043] As shown in Figures 19, 20, and 21, the expansion member 210 has a marker portion 260 for aligning the expansion member 210 with the first puncture site p1.

[0044] As shown in Figure 8, the marker portion 260 can be composed of a transparent central part surrounding the center c1 and a colored circular frame surrounding the central part.

[0045] As shown in Figures 6 and 7, the marker portion 260 is positioned on the outer surface of the expansion member 210. Alternatively, the marker portion 260 may be positioned on the inner surface of the expansion member 210 facing the lumen 210a.

[0046] Furthermore, there are no particular restrictions on the specific shape, color, position in the planar direction of the extension member 210, or method of forming the marker portion 260. The marker portion 260 can also be composed of, for example, a circular marker composed entirely of color, a marker composed of a transparent center and a rectangular frame, or a rectangular marker composed entirely of color.

[0047] <Cover component> As shown in Figures 5, 6, and 7, the cover member 100 comprises a main body portion 110 on which the expansion member 210 is located, a first band portion 410 configured to be positioned between the patient's fingers and extending in a first direction from the main body portion 110, a second band portion 420 extending in a second direction different from the first direction from the main body portion 110, and a third band portion 430 facing the second band portion 420 with the expansion member 210 in between, and extending in a third direction different from the first and second directions from the main body portion 110.

[0048] The area of ​​the cover member 100 where the extension member 210 is positioned (the area that overlaps with the extension member 210 in the plan view shown in Figure 5) constitutes the main body portion 110.

[0049] As shown in Figures 5, 6, and 7, the main body 110 includes a support member 300 made of a harder material than the expansion member 210. In the plan view shown in Figure 5, the support member 300 is positioned to overlap with the expansion member 210. Details of the support member 300 will be described later.

[0050] As shown in Figures 6 and 7, the main body 110 includes a holding portion 130 for holding the support member 300.

[0051] The holding portion 130 can be made from a part of the sheet material 120 that constitutes the cover member 100. In this embodiment, in the plan view shown in Figure 5, a part of the sheet material 120 is folded back from the base end (the side that is placed on the forearm Ar) to the tip end (the side that is placed on the fingertip) so that a space g is formed at a position that overlaps with the main body portion 110. The end portion 121 located at the tip end of the folded portion of the sheet material 120 is connected to the main body portion 110.

[0052] As shown in Figures 6 and 7, the holding portion 130 comprises an upper surface region 131, a lower surface region 132 facing the upper surface region 131 with a space g in between, and a curved region 133 located at the base end 122 of the main body portion 110.

[0053] In the vertical width direction wa (see the cross-section shown in Figure 6), the space g is closed between the end 121 and the base end 122. In the horizontal width direction wb, the space g is in communication with the outside on the side of the second band portion 420 and the side of the third band portion 430 (see the cross-section shown in Figure 7).

[0054] As shown in Figures 4 and 5, near the curved region 133 of the holding portion 130 (near the base end portion 122 of the main body portion 110), constricted portions 132a and 132b are formed where the width of the lower surface region 132 gradually decreases toward the curved region 133.

[0055] As shown in Figure 4, each band portion 410, 420, and 430 can be connected to any position in the area surrounding the holding portion 130 on the main body portion 110. Furthermore, each band portion 410, 420, and 430 can be connected to the surface located on the body surface side of the right hand H1 within the aforementioned area. Each band portion 410, 420, and 430 can be connected to the main body portion 110 by, for example, fusion or adhesive. Note that each band portion 410, 420, and 430 may be integrally constructed with the main body portion 110.

[0056] As shown in Figures 1 and 2, the first band portion 410 has one end 411 connected to the main body portion 110 of the cover member 100, another end 412 located on the opposite side of the one end 411, and a main body portion 413 extending between the one end 411 and the other end 412.

[0057] The first band portion 410 can be positioned, for example, as shown in Figure 19, so as to hook onto the interdigital portion fb located between the thumb and index finger of the patient's right hand H1, with the expansion member 210 positioned at the first puncture site p1.

[0058] As shown in Figures 1 and 2, the second band portion 420 has one end 421 connected to the main body portion 110 of the cover member 100, another end 422 located on the opposite side of the one end 421, and a main body portion 423 extending between the one end 421 and the other end 422.

[0059] The second direction in which the second band portion 420 extends is not particularly limited, as long as it is a different direction from the first direction in which the first band portion 410 extends.

[0060] As shown in Figures 1 and 2, the third band portion 430 has one end 431 connected to the main body portion 110 of the cover member 100, another end 432 located on the opposite side of the one end 431, and a main body portion 433 extending between the one end 431 and the other end 432.

[0061] The third direction in which the third band portion 430 extends is not particularly limited, as long as it is different from the first direction in which the first band portion 410 extends and the second direction in which the second band portion 420 extends.

[0062] As shown in Figures 18 and 19, the second band portion 420 and the third band portion 430 can be positioned to wrap around the outer circumference of the right hand H1 when attaching the hemostatic device 10 to the patient's right hand H1.

[0063] As shown in Figure 5, the second band portion 420 and the third band portion 430 are positioned opposite each other with the expansion member 210 in between. Therefore, when wrapping the second band portion 420 and the third band portion 430 around the right hand H1, a tensile force is applied to the second band portion 420 and the third band portion 430 in a direction that separates them from each other, and a tensile force is also applied to the main body portion 110 in the same direction.

[0064] The constituent materials of each strip portion 410, 420, and 430 are not particularly limited, but can be made of, for example, polyvinyl chloride resin, polyurethane resin, polyester resin, etc. Furthermore, there are no particular restrictions on the shape, length, thickness, etc., of each strip portion 410, 420, and 430.

[0065] Each of the band sections 410, 420, and 430 is provided with four fixing parts: a first fixing part 510, a second fixing part 520, a third fixing part 530, and a fourth fixing part 540, which allow the cover member 100 to be fixed to the right hand H1.

[0066] As shown in Figure 1, the first fixing portion 510 is positioned on the outer surface of the main body portion 423 of the second band portion 420.

[0067] As shown in Figure 1, the second fixing portion 520 is positioned on the outer surface of the main body portion 433 of the third band portion 430.

[0068] As shown in Figure 2, a third fixing portion 530 is positioned on the inner surface of the main body portion 423 of the second band portion 420.

[0069] As shown in Figure 2, the fourth fixing portion 540 is positioned on the inner surface of the main body portion 413 of the first band portion 410.

[0070] The first fixing part 510 and the second fixing part 520 are made up of the male side of the hook-and-loop fastener. The third fixing part 530 and the fourth fixing part 540 are made up of the female side of the hook-and-loop fastener. The hook-and-loop fastener in this specification is a fastener that can be attached and detached on a surface, such as Magic Tape® or Velcro®.

[0071] The second band portion 420 and the third band portion 430 are detachably connected via a third fixing portion 530 located on the inner surface of the main body portion 423 of the second band portion 420 and a second fixing portion 520 located on the outer surface of the main body portion 433 of the third band portion 430. Furthermore, the first band portion 410 and the second band portion 420 are detachably connected via a fourth fixing portion 540 located on the inner surface of the main body portion 413 of the first band portion 410 and a first fixing portion 510 located on the outer surface of the main body portion 423 of the second band portion 420.

[0072] The specific structure of each fixing part 510, 520, 530, and 540 is not limited as long as the cover member 100 can be fixed to the right hand H1 by connecting each band part 410, 420, and 430 to each other with the hemostatic device 10 positioned on the right hand H1. For example, the installation of some fixing parts can be omitted or the position of the fixing parts on each band part 410, 420, and 430 can be changed as desired. Also, if each fixing part 510, 520, and 530 is made of hook-and-loop fasteners, the male and female sides of the hook-and-loop fasteners can be swapped. Furthermore, each fixing part 510, 520, 530, and 540 may be made of, for example, a snap, button, clip, or a connecting mechanism having a frame part with a projection and an engaged part with a hole that can engage with the frame part.

[0073] <Support member> Figures 8 to 15 show the support member 300. In the figures, arrows X1-X2 indicate the vertical direction of the support member 300 (same direction as the vertical width wa direction of the extension member 210), arrows Y1-Y2 indicate the width direction of the support member 300 (same direction as the horizontal width wb direction of the extension member 210), and arrows Z1-Z2 indicate the thickness direction of the support member 300.

[0074] As shown in Figures 4, 5, 8, 9, and 10, the support member 300 is located on the side of the first band portion 410 and has an upper end portion 301 that forms the end of the support member 300, a lower end portion 302 that forms the end opposite to the upper end portion 301, and a pair of side portions 303 and 304 that connect the upper end portion 301 and the lower end portion 302.

[0075] As shown in Figures 19 and 22, the upper end portion 301 can be positioned on the fingertip side (distal side) of the fingers when the hemostatic device 10 is attached to the right hand H1. The lower end portion 302 can be positioned on the forearm side (proximal side) when the hemostatic device 10 is attached to the right hand H1.

[0076] As shown in Figure 8, the support member 300 is configured such that the width w1 of the support member 300 decreases from the upper end 301 to the lower end 302.

[0077] The thickness t2 of the end face located on the upper end 301 side (see Figure 9) is formed to be thicker than the thickness t3 of the end face located on the lower end 302 side (see Figure 10). Therefore, as shown in Figure 11, the support member 300 is configured such that the thickness t1 of the side portions 303 and 304 connecting the upper end 301 and the lower end 302 becomes thinner from the upper end 301 to the lower end 302. In other words, in the cross-sectional view shown in Figure 6 and the cross-sectional view shown in Figure 20, the support member 300 is inclined such that the distance between the outer surface 300b and the inner surface 300a decreases from the upper end 301 to the lower end 302.

[0078] The inner surface 300a of the support member 300 is the surface located on the lower surface region 132 side of the holding portion 130. The outer surface 300b of the support member 300 is the surface located on the upper surface region 131 side of the holding portion 130 (see Figure 6).

[0079] The lower end portion 302 of the support member 300 has a straight, flat portion 302a in a plan view as shown in Figure 8. The flat portion 302a extends in a substantially straight line between the corner portions 306a and 306b located on the lower end portion 302 side.

[0080] The upper end portion 301 of the support member 300 has a straight, flat portion 301a in a plan view as shown in Figure 8. The flat portion 301a extends in a substantially straight line between the corner portions 306c and 306d located on the upper end portion 301 side.

[0081] As shown in Figures 7, 9, 10, 12, and 13, the outer surface 300b of the support member 300 is curved toward the second band portion 420 and the third band portion 430. In other words, the most protruding apex of the outer surface 300b of the support member 300 is located near the center in the width direction of the support member 300. Furthermore, the apex of the outer surface 300b of the support member 300 is located along the longitudinal direction of the support member 300. In other words, the apex of the outer surface 300b of the support member 300 is located along the longitudinal direction passing through the intermediate portion 305.

[0082] The radius of curvature of the outer surface 300b of the support member 300 is approximately constant in each part of the support member 300 in the longitudinal direction.

[0083] The four corners 306a, 306b, 306c, and 306d of the support member 300 are formed in a rounded, curved shape.

[0084] The support member 300 has an intermediate portion 305 located between the upper end portion 301 and the lower end portion 302 in a plan view as shown in Figure 8. The intermediate portion 305 is located in the middle of the vertical direction connecting the upper end portion 301 and the lower end portion 302.

[0085] The support member 300 has a shape that is symmetrical with respect to the center line C of the first strip portion 410 (the axis along the extending direction of the first strip portion 410) in the main body portion 110. In this embodiment, the support member 300 has a shape that is symmetrical with respect to a line segment that is perpendicular to the axis along the width w1' of the upper end portion 301 and passes through points that are equal in distance from both ends of the width w1' of the upper end portion 301. Therefore, the support member 300 can be arranged in the main body portion 110 so as to be symmetrical with respect to the center line C of the first strip portion 410 (the axis along the extending direction of the first strip portion 410). Also, as shown in the plan view of Figure 8, each side portion 303, 304 is formed symmetrically with respect to the center line C of the first strip portion 410 in the main body portion 110. Each side portion 303, 304 extends symmetrically on both sides such that the width w1 of the support member 300 decreases by approximately a constant rate from the upper end 301 side to the lower end 302 side.

[0086] The support member 300 has a position that is the center of gravity G1 of the outer shape of the support member 300 in the plan view shown in Figure 8.

[0087] The support member 300 has a roughly trapezoidal shape in which the width w1' of the upper end 301 is larger than the width w1'' of the lower end 302. Therefore, the center of gravity G1 of the outer shape of the support member 300 is located at a position shifted by a predetermined distance from the middle part 305 of the support member 300 towards the upper end 301 side (the lower base side of the trapezoidal shape).

[0088] In the plan view shown in Figure 8, the extension member 210 is positioned on the cover member 100 such that the center c1 of the extension member 210 is located on the lower end 302 side (the upper bottom side of the trapezoidal shape) of the support member 300, relative to the center of gravity G1 of the outer shape of the support member 300.

[0089] As shown in Figure 8, the support member 300 has a width w1' at its upper end 301 which is longer than the width wb of the extension member 210. Also, the support member 300 has a width w1'' at its lower end 302 which is shorter than the width wb of the extension member 210.

[0090] In this embodiment, the width w1' of the upper end portion 301 of the support member 300 is defined as the dimension of the widest part (maximum width) in the region located on the upper end portion 301 side of the intermediate portion 305 of the support member 300. The width w1'' of the lower end portion 302 of the support member 300 is defined as the width of the flat portion 302a located at the lower end portion 302.

[0091] As shown in Figures 7, 9, 14, and 15, the inner surface 300a of the support member 300 is curved in a convex shape toward the direction away from the expansion member 210. The inner surface 300a, like the outer surface 300b, is curved toward the second band portion 420 and the third band portion 430.

[0092] As shown in Figure 14, the radius of curvature of the inner surface 300a of the upper end 301 of the support member 300 is smaller than the radius of curvature of the inner surface 300a of the lower end 302 of the support member 300. In other words, the inner surface 300a of the support member 300 is more curved at the upper end 301 than at the lower end 302. The dashed line R1 in Figure 14 shows a portion of the arc along the inner surface 300a of the upper end 301, and the dashed line R2 shows a portion of the arc along the inner surface 300a of the lower end 302.

[0093] The support member 300 can be manufactured in a way that allows for adjustment of the radius of curvature of the inner surface 300a and the thickness t1 of the side surfaces 303 and 304, for example, by employing the following manufacturing method.

[0094] As the constituent material for the support member 300, a curved plate-like member is prepared in which the radius of curvature of the inner surface 300a and the outer surface 300b are formed to be approximately the same. In order to establish the aforementioned relationship of magnitude of the radius of curvature between the upper end 301 side and the lower end 302 side of the inner surface 300a of the support member 300, the constituent material of the plate-like member is machined by removing material from the inner surface 300a of the plate-like member. At this time, the amount of material removed is increased at the lower end 302 side and gradually decreased towards the upper end 301 side. By machining the inner surface 300a of the plate-like member in this way, the radius of curvature of the inner surface 300a of the lower end 302 can be made larger than the radius of curvature of the inner surface 300a of the upper end 301 (see Figure 14). In addition, the thickness t1 of the side portions 303 and 304 can be made thinner from the upper end 301 side to the lower end 302 side (see Figure 9). Furthermore, by not performing any machining on the outer surface 300b of the plate-shaped member to remove material, the radius of curvature of the outer surface 300b of the support member 300 can be configured to maintain the radius of curvature of the plate-shaped member. As a result, the outer surface 300b of the support member 300 can be configured to have substantially the same radius of curvature in each part of the support member 300 in the vertical direction.

[0095] Preferably, the hemostatic device 10 has transparent parts in the portion of the expansion member 210 where the marker portion 260 is provided, the portion of the cover member 100 that overlaps with the marker portion 260 (the upper surface area 131 and the lower surface area 132 of the holding portion 130), and the portion of the support member 300 that overlaps with the marker portion 260. When the members 100, 210, and 300 are configured in this way, as shown in Figures 17 to 19, the surgeon can easily visually confirm the position of the marker portion 260 placed on the expansion member 210 and / or the first puncture site p1 through the transparent parts of the members 100, 210, and 300 when attaching the hemostatic device 10 to the patient's right hand H1. Note that the above-mentioned transparency includes colored transparent, colorless transparent, and translucent.

[0096] The support member 300 is made of a harder material than the expansion member 210. Therefore, as shown in Figures 20 and 21, when the expansion member 210 applies compressive force to the first puncture site p1, the support member 300 can press the expansion member 210 against the patient's right hand H1. This prevents the expansion member 210 from lifting away from the patient's right hand H1.

[0097] When the expansion member 210 is constructed from the aforementioned materials, the supporting member 300 can be constructed from materials such as acrylic resin, polyvinyl chloride (especially rigid polyvinyl chloride), polyethylene, polypropylene, polyolefins such as polybutadiene, polystyrene, poly-(4-methylpentene-1), polycarbonate, ABS resin, polymethyl methacrylate (PMMA), polyacetal, polyacrylate, polyacrylonitrile, polyvinylidene fluoride, ionomer, acrylonitrile-butadiene-styrene copolymer, polyethylene terephthalate (PET), etc.

[0098] <Injection part> As shown in Figures 1 and 2, the hemostatic device 10 has an injection section 281 for injecting fluid into the expansion member 210.

[0099] The injection section 281 is comprised of a connector with a built-in check valve (not shown). A syringe (not shown) can be connected to the injection section 281.

[0100] A buffer member 282 having an expandable space is positioned between the injection section 281 and the expansion member 210. The buffer member 282 is made of a flexible, bag-shaped member with an internal space. The buffer member 282 may also be provided with an arrow-shaped marker indicating the direction of syringe insertion into the injection section 281.

[0101] An injection section 281 is connected to one end of the buffer member 282. The lumen of the injection section 281 is in communication with the space of the buffer member 282. However, while the check valve built into the injection section 281 is closed, communication between the lumen of the injection section 281 and the space of the buffer member 282 is blocked.

[0102] A flexible tube 283 is connected to the other end of the cushioning member 282. The lumen of the tube 283 communicates with the space of the cushioning member 282. In addition, the other end of the tube 283, opposite to the end connected to the cushioning member 282, is connected to the expansion member 210. The lumen of the tube 283 communicates with the lumen 210a of the expansion member 210.

[0103] When expanding the expansion member 210, the surgeon inserts the tip of a syringe (not shown) into the injection port 281 and opens the check valve. With the check valve of the injection port 281 open, the surgeon pushes the plunger of the syringe to inject air from inside the syringe into the lumen 210a of the expansion member 210.

[0104] When air is injected into the lumen 210a of the expansion member 210, the expansion member 210 expands. When the expansion member 210 expands, the buffer member 282, which communicates with the lumen 210a of the expansion member 210 via the tube 283, also expands. By visually confirming the expansion of the buffer member 282, the operator can easily confirm that the expansion member 210 has expanded without any air leakage.

[0105] When the surgeon deflates the expansion member 210, he inserts the tip of the syringe into the injection section 281 and pulls the plunger of the syringe. By performing the above operation, the surgeon can expel the air from the lumen 210a of the expansion member 210 into the syringe.

[0106] The injection section 281, the buffer member 282, and the tube 283 may be prepared and provided connected to the expansion member 210, or they may be prepared and provided separately from the expansion member 210. Furthermore, there are no particular restrictions on the specific configuration of the injection section 281, as long as it is capable of supplying fluid to the lumen 210a of the expansion member 210 and discharging fluid from the lumen 210a of the expansion member 210.

[0107] <Examples of hemostatic device use> Next, with reference to Figures 16 to 22, we will explain examples of the use and effects of the hemostatic device 10.

[0108] The following describes the procedure for using the hemostatic device 10 to stop bleeding at the first puncture site p1 formed on the patient's right hand H1, as shown in Figure 16.

[0109] Figure 17 shows the state after various procedures have been completed using the sheath tube 610 of the introducer 600 inserted into the first puncture site p1.

[0110] When the surgeon attaches the hemostatic device 10 to the patient's right hand H1, he positions the expansion member 210 and the support member 300 so that they overlap at the first puncture site p1, as shown in Figure 17. At this time, the surgeon can appropriately position the expansion member 210 and the support member 300 at the first puncture site p1 by visually confirming the position of the marker portion 260 placed on the expansion member 210 and positioning the marker portion 260 at the first puncture site p1.

[0111] When the surgeon attaches the hemostatic device 10 to the patient's right hand H1, the surgeon positions the support member 300 so that it overlaps the metacarpal bone B1 of the index finger and the metacarpal bone B2 of the thumb. As shown in Figure 16, the distance between the metacarpal bone B1 of the index finger and the metacarpal bone B2 of the thumb gradually narrows from the fingertip side toward the forearm Ar side. The width w1 of the support member 300 shortens from the upper end 301 located toward the fingertip side toward the lower end 302 located toward the forearm Ar side (see Figure 8). Therefore, by positioning the support member 300 so that it overlaps the metacarpal bone B1 of the index finger and the metacarpal bone B2 of the thumb from the back of the patient's right hand H1, the surgeon can position the support member 300 so that it follows the contours of the metacarpal bone B1 of the index finger and the metacarpal bone B2 of the thumb. The surgeon can prevent a gap from forming between the expansion member 210, which is positioned on the inner surface 300a side of the support member 300, and the right hand H1 by positioning the support member 300 along the metacarpal bone B1 of the index finger and the metacarpal bone B2 of the thumb.

[0112] As shown in Figure 18, the surgeon wraps the second band portion 420 and the third band portion 430 around the outer circumference of the patient's right hand H1. The surgeon can connect the second band portion 420 and the third band portion 430 via the fixation points 520 and 530 by bringing the third fixation point 530 (see Figure 2), which is located on the inner surface of the second band portion 420, into contact with the second fixation point 520 (see Figure 1), which is located on the outer surface of the third band portion 430. The surgeon can securely wrap each band portion 420 and 430 around the outer circumference of the right hand H1 by connecting the band portions 420 and 430 together with the support member 300 overlapping the metacarpal bone B1 of the index finger and the metacarpal bone B2 of the thumb.

[0113] The outer surface 300b of the support member 300 is curved toward the second band portion 420 side (side portion 303 side) and the third band portion 430 side (side portion 304 side) (see Figures 5, 9, and 10). Therefore, as shown in Figure 18, by wrapping the second band portion 420 and the third band portion 430 around the patient's right hand H1, the support member 300 can be pressed against the right hand H1 from the outer surface 300b side so as to follow the outer circumference of the right hand H1, as shown in Figure 21. As a result, the hemostatic device 10 can increase the fixing force of the support member 300 and the expansion member 210 to the patient's right hand H1.

[0114] As shown in Figure 19, the surgeon places the first band portion 410 through the interdigital space fb located between the thumb and index finger of the patient's right hand H1, while positioning a portion of the first band portion 410 on the palm side of the patient's right hand H1. At this time, the surgeon can connect the first band portion 410 and the second band portion 420 via the fixation portions 510 and 540 by bringing the fourth fixation portion 540 (see Figure 2), located on the inner surface of the first band portion 410, into contact with the first fixation portion 510 (see Figure 1), located on the outer surface of the second band portion 420.

[0115] The support member 300 comprises an upper end portion 301 and side portions 303 and 304. The first band portion 410 extends from the upper end portion 301 side, the second band portion 420 extends from the side portion 303 side, and the third band portion 430 extends from the side portion 304 side (see Figure 5). Therefore, by connecting the band portions 410, 420, and 430 to each other, the hemostatic device 10 can fix the support member 300 to the patient's right hand H1 while applying equal force to the positions corresponding to each portion 301, 303, and 304 of the support member 300.

[0116] The width w1' of the upper end 301 of the support member 300 is longer than the width wb of the expansion member 210, and the width w1'' of the lower end 302 of the support member 300 is shorter than the width wb of the expansion member 210 (see Figure 8). For example, if the support member is placed on the patient's right hand H1 and the first band is tightly fastened to the interdigital portion fb, the expansion member may shift towards the lower end of the support member (forearm portion Ar side), which is on the opposite side from where the first band is fastened. To address this problem, the support member 300 of this embodiment has a width w1'' of the lower end 302 of the support member 300 that is shorter than the width wb of the expansion member 210, thus preventing the expansion member 210 from shifting towards the lower end 302 of the support member 300. In particular, the inner surface 300a of the support member 300 is curved convexly toward the side away from the expansion member 210 (see Figures 14 and 21). Therefore, the support member 300 can hold down both ends of the expansion member 210 in the lateral direction at the ends of the inner surface 300a of the support member 300 in the width direction. Thus, the hemostatic device 10 can effectively prevent the expansion member 210 from shifting toward the lower end 302 of the support member 300 when the expansion member 210 expands.

[0117] The support member 300 is symmetrical with respect to the center line C of the first band portion 410 in the main body portion 110 (see Figures 5 and 8). Therefore, the hemostatic device 10 can apply force evenly to the support member 300 in a symmetrical direction by wrapping the band portions 420 and 430, which extend symmetrically with respect to the first band portion 410, around the patient's right hand H1. As a result, the hemostatic device 10 can prevent the support member 300 from shifting position when it is positioned on the patient's right hand H1.

[0118] The inner surface 300a of the support member 300 is curved convexly toward the direction away from the expansion member 210 (see Figures 7 and 21). There are inclined areas on various parts of the patient's right hand H1 (for example, around the snuff box Sb). Furthermore, the shape of the inclined areas of the right hand H1 varies from patient to patient. For example, if the inner surface of the support member is formed in a flat shape, it would be difficult to position the support member to conform to the inclined areas of the right hand H1. The hemostatic device 10 has an inner surface 300a of the support member 300 that is curved convexly toward the direction away from the expansion member 210 as described above. Therefore, when the inner surface 300a of the support member 300 is positioned to overlap the inclined area of ​​the patient's right hand H1, the inner surface 300a of the support member 300 can be positioned along the patient's right hand H1. As a result, the hemostatic device 10 can be positioned to overlap the support member 300 on the first puncture site p1, regardless of the patient's dominant hand or the operator's positioning. Therefore, when the hemostatic device 10 applies pressure to the first puncture site p1 to stop bleeding, the support member 300 can be suitably positioned at a desired location near the first puncture site p1.

[0119] Furthermore, when the surgeon wraps the second band portion 420 and the third band portion 430 of the hemostatic device 10 around the patient's right hand H1, the inner surface 300a of the support member 300 is positioned along the surface of the right hand H1. This allows the band portions 420 and 430 extending from the respective side portions 303 and 304 of the support member 300 to be positioned close to or in close contact with the surface of the patient's right hand H1 (see Figure 21). As a result, the hemostatic device 10 can increase the fixing force of the support member 300 and the expansion member 210 to the patient's right hand H1. Consequently, when the hemostatic device 10 is attached to the patient's right hand H1, displacement of the support member 300 and the expansion member 210 is less likely to occur even if an external impact is applied.

[0120] The surgeon expands the expansion member 210 by injecting air into it while the syringe is connected to the injection port 281. As shown in Figures 20 and 21, when the expansion member 210 expands, the hemostatic device 10 applies a compressive force to the first puncture site p1.

[0121] When the hemostatic device 10 is attached to the patient's right hand H1 and the expansion member 210 expands, the support member 300 presses the expansion member 210 against the patient's right hand H1. This prevents the hemostatic device 10 from lifting away from the patient's right hand H1.

[0122] When a surgeon uses a hemostatic device to stop bleeding, they can tighten the first band, which is positioned at the interdigital space fb, to increase the fixation force of the support member to the patient's right hand H1. By tightening the first band, the surgeon can firmly fix the support member to the patient's right hand H1, even if it is positioned unstable on the patient's right hand H1. However, tightening the first band may cause pain to the patient. Therefore, if the first band cannot be tightened strongly due to pain or other reasons, the hemostatic device may be positioned with the inner surface of the support member tilted relative to the body surface of the patient's right hand H1. Specifically, the upper end of the support member on which the first band is positioned may float excessively farther away from the body surface of the patient's right hand than the lower end on the opposite side of the upper end. As a result, the hemostatic device is positioned at an angle such that the distance between the inner surface of the support member and the body surface of the patient's right hand H1 gradually decreases from the upper end to the lower end of the support member.

[0123] The hemostatic device 10 is configured such that the thickness t1 of the side portions 303 and 304 of the support member 300 decreases from the upper end 301 to the lower end 302. In addition, the first band portion 410, which is configured to be positioned in the interdigital portion fb located between the patient's fingers, extends from the upper end 301 side of the support member 300 and is configured to press the upper end 301 side of the support member 300 against the patient's right hand H1. With the hemostatic device 10 configured in this way, when the expansion member 210 begins to expand while the support member 300 and expansion member 210 are fixed to the patient's right hand H1, the expansion member 210 applies force to the vicinity of the upper end 301 of the support member 300. The upper end 301 side of the support member 300 is lifted by the force applied by the expansion member 210. As a result, when the expansion member 210 is expanded, the inner surface 300a of the support member 300 is positioned approximately parallel to the body surface of the patient's right hand H1, as shown in Figure 20. Therefore, when the expansion member 210 is expanded, the hemostatic device 10 can apply a compressive force perpendicular to the first puncture site p1.

[0124] The inner surface 300a of the support member 300 is curved convexly toward the direction away from the expansion member 210 (see Figures 7 and 21). Therefore, as shown in Figure 21, the hemostatic device 10 is positioned such that the support member 300 is aligned with the body surface of the patient's right hand H1 when the expansion member 210 is expanded. When the expansion member 210 is expanded, the hemostatic device 10 uses the inner surface 300a of the support member 300 to press the expansion member 210 toward the body surface of the patient's right hand H1. As a result, the hemostatic device 10 applies compressive force to the expansion member 210 from the center side in the width direction of the inner surface 300a of the support member 300 and from the side surfaces 303 and 304 located at both ends in the width direction of the inner surface 300a of the support member 300 toward the first puncture site p1. Therefore, compared to the case where the inner surface 300a of the support member 300 is formed with a flat surface shape, the hemostatic device 10 can effectively increase the compressive force that the expansion member 210 applies to the first puncture site p1.

[0125] The outer surface 300b of the support member 300 is curved toward the second band portion 420 side (side portion 303 side) and the third band portion 430 side (side portion 304 side) (see Figures 5, 9, and 10). Therefore, as shown in Figure 21, when the hemostatic device 10 is attached to the patient's right hand H1 and the expansion member 210 is expanded, the outer surface 110b of the main body portion 110 located toward the outer surface 300b of the support member 300 has a curved shape along the outer surface 300b of the support member 300. When the expansion member 210 is expanded, the outer surface 300b of the support member 300 and the main body portion 110 of the hemostatic device 10 have a curved shape. Therefore, when the hemostatic device 10 comes into contact with surrounding objects or when an impact is applied to the outer surface 110b of the main body portion 110, the impact can be deflected outwards along the curved surfaces 110b and 300b. Therefore, the hemostatic device 10 can effectively prevent displacement of the support member 300 and the expansion member 210, even when subjected to external impact while attached to a patient.

[0126] Furthermore, in order to achieve the above effects, it is preferable that the hemostatic device 10 is positioned such that the entire expansion member 210 fits inside the support member 300 in the planar view shown in Figure 8. When the hemostatic device 10 is positioned in this way, the entire expansion member 210 is covered by the support member 300, which effectively prevents impacts applied from the outer surface 110b of the main body 110 from being directly transmitted to the expansion member 210.

[0127] Figure 22 shows the state when a patient wearing the hemostatic device 10 twists their wrist towards the back of their right hand H1. When the hemostatic device 10 is attached to the patient's right hand H1, the lower end 302 of the support member 300 is positioned towards the forearm Ar. The lower end 302 of the support member 300 has a straight, flat portion 302a (see Figure 8). Therefore, as shown in Figure 22, when the patient twists their wrist towards the back of their right hand H1, the flat portion 302a located at the lower end 302 prevents the support member 300 from digging into the body surface of the patient's wrist or forearm Ar. Thus, while the hemostatic device 10 is controlling bleeding at the first puncture site p1 formed on the patient's right hand H1, the support member 300 can be prevented from digging into the body surface when the patient twists their wrist or makes other movements. For example, if a support member is formed in a triangular shape in plan view, with the corner (vertex) located on the forearm side (Ar), when the patient twists their wrist, the corner located at the lower end may dig into the patient's body surface, causing the patient to feel pain.

[0128] The support member 300 has a position that is the center of gravity G1 of the outer shape of the support member 300 in the plan view shown in Figure 8. The center of gravity G1 is located on the upper end 301 side of the intermediate portion 305, which is located between the upper end 301 and the lower end 302 of the support member 300. The expansion member 210 is positioned on the cover member 100 with its center c1 located on the lower end 302 side of the support member 300, which is the center of gravity G1 of the support member 300. The hemostatic device 10 is configured such that the expansion member 210 expands when its center c1 is located on the lower end 302 side of the support member 300, which is the center of gravity G1 of the support member 300. The support member 300 has a center of gravity G1 located on the upper end 301 side of the center c1 of the expansion member 210. Therefore, when the expansion member 210 expands, a portion of the expansion member 210 located on the upper end 301 side of the support member 300 can be pressed against the body surface of the patient's right hand H1. As a result, when the expansion member 210 expands, the hemostatic device 10 can lift the lower end 302 side of the support member 300 away from the body surface of the patient's right hand H1. Consequently, while the hemostatic device 10 is attached to the patient's right hand H1 and the expanded expansion member 210 is applying compressive force to the first puncture site p1, the hemostatic device 10 can effectively prevent the lower end 302 of the support member 300, which is positioned on the wrist or forearm Ar side of the patient, from digging into the body surface.

[0129] Furthermore, the support member 300 has rounded corners 306a, 306b, 306c, and 306d (see Figure 8). Therefore, while the expansion member 210 of the hemostatic device 10 is expanding and applying compressive force to the first puncture site p1, the corners 306a, 306b, 306c, and 306d of the support member 300 are prevented from digging into the surface of the patient's right hand H1.

[0130] As shown in Figure 8, the hemostatic device 10 has a roughly trapezoidal shape in which the width w1 of the support member 300 gradually decreases from the upper end 301 to the lower end 302, thus providing the following effects.

[0131] When comparing a typical trapezoid and a triangle with approximately the same vertical length, the distance from the upper end corresponding to the base or lower base to the center of gravity is greater for the trapezoid. Therefore, when the hemostatic device 10 uses an approximately oval-shaped expansion member 210 as shown in Figure 8, and is configured to align the center c1 of the expansion member 210 with the vertical center of the support member 300, the distance between the center of gravity G1 and the center of gravity of the expansion member 210 can be reduced when the support member 300 is formed as a trapezoid compared to when it is formed as a triangle. Because the distance between the center of gravity G1 of the support member 300 and the center of gravity of the expansion member 210 is small, the hemostatic device 10 can suppress the tilting of the support member 300 caused by the lower end 302 side of the support member 300 being excessively lifted when the expansion member 210 is expanded, and can suitably apply compressive force to the first puncture site p1. Therefore, the hemostatic device 10 can firmly press the expansion member 210 against the right hand H1 with the support member 300, and can effectively increase the compressive force that the expansion member 210 applies to the first puncture site p1. In the above description, the center of gravity of the expansion member 210 refers to the center of gravity of the component on the bottom side of the expansion member 210 (the area on the inner surface 110a of the main body 110 where the expansion member 210 is projected in a plan view). In this embodiment, the center of gravity of the expansion member 210, which is formed in a substantially oval shape, is located at a position that coincides with the center c1 of the expansion member 210 in the plan view shown in Figure 8 (see Figure 8).

[0132] Furthermore, in the plan view shown in Figure 8, it is preferable that the entire expansion member 210 of the hemostatic device 10 is positioned inside the support member 300. This arrangement of the expansion member 210 allows the support member 300 to firmly press down on the expansion member 210, thereby effectively increasing the compressive force that the expansion member 210 applies to the first puncture site p1.

[0133] Furthermore, the hemostatic device 10 is configured such that the width w1 of the support member 300 is approximately trapezoidal in shape, gradually decreasing from the upper end 301 to the lower end 302. As a result, the entire extension member 210 can be placed inside the support member 300, and the positional relationship between the center of gravity G1 of the support member 300 and the center c1 of the extension member 210 can be favorably maintained.

[0134] For example, if the support member is formed in a triangular shape in plan view, and the vertex of the triangle is located on the forearm Ar side, then in order to ensure that the vertical and horizontal width of the expansion member is as large as possible while positioning the entire expansion member inside the support member, the hemostatic device needs to position the expansion member near the vertex of the triangle of the support member as well. In this case, the expansion member is formed in an elongated shape along the vertical direction in plan view. When the expansion member is formed in this way, it becomes necessary to form the expansion member with a smaller horizontal width than the expansion member 210 of this embodiment, which has a shape corresponding to the support member formed in a roughly trapezoidal shape. As a result, the expansion member formed to correspond to the support member formed in a triangular shape in plan view has a smaller compression area that the expansion member applies compression force to around the first puncture site p1. Consequently, it becomes difficult for the hemostatic device to effectively apply compression force to the first puncture site p1. Furthermore, if the support member is formed in the shape of a triangle as described above, and the extension member 210 is formed to be elongated along the vertical direction of the support member so that its width is narrower, it becomes difficult to set the positional relationship between the center of gravity G1 of the support member 300 and the center c1 of the extension member 210 (see Figure 8). Also, if it is not possible to place the extension member near the vertex of the triangle, it becomes impossible to place the extension member between the support member and the body surface. In this case, when the patient performs actions such as twisting their wrist (see Figure 22), the lower end of the support member corresponding to the vertex of the triangle is more likely to dig into the patient's body surface.

[0135] After expanding the expansion member 210, the surgeon removes the sheath tube 610 of the introducer 600 from the first puncture site p1 as shown in Figure 19. While the surgeon is performing hemostasis using the hemostatic device 10, the surgeon confirms that there is no bleeding from the first puncture site p1. If there is bleeding from the first puncture site p1, the surgeon can adjust the amount of air injected into the expansion member 210.

[0136] By following the above procedure, the surgeon can use the hemostatic device 10 to stop bleeding from the first puncture site p1 formed on the patient's right hand H1.

[0137] The surgeon may, for example, use the hemostatic device 10 to stop bleeding at the second puncture site p2 shown in Figure 16. When stopping bleeding at the second puncture site p2, the surgeon positions the support member 300 and the expansion member 210 so as to overlap them with the second puncture site p2, similar to when stopping bleeding at the first puncture site p1.

[0138] In the hemostatic device 10, the radius of curvature of the inner surface 300a of the upper end 301 of the support member 300 is smaller than the radius of curvature of the inner surface 300a of the lower end 302 of the support member 300 (see Figure 14). As mentioned above, the area around the snuffbox where the support member 300 and the expansion member 210 are placed is surrounded by the extensor pollicis longus tendon T1 and the extensor pollicis brevis tendon T2 (see Figure 16). Also, the distance between the extensor pollicis longus tendon T1 and the extensor pollicis brevis tendon T2 narrows towards the Ar side of the forearm. The support member 300 is designed so that, in order to accommodate changes in the distance between the extensor pollicis longus tendon T1 and the extensor pollicis brevis tendon T2, the radius of curvature of the inner surface 300a of the upper end 301, which is positioned on the fingertip side of the extensor pollicis longus tendon T1 and the extensor pollicis brevis tendon T2, is small, and the radius of curvature of the inner surface 300a of the lower end 302, which is positioned on the forearm Ar side of the extensor pollicis longus tendon T1 and the extensor pollicis brevis tendon T2, is large. Therefore, when the hemostatic device 10 is placed on the patient's right hand H1 to stop bleeding at the second puncture site p2, the support member 300 is positioned along the extensor pollicis longus tendon T1 and the extensor pollicis brevis tendon T2. ​​As a result, when stopping bleeding at the second puncture site p2, the hemostatic device 10 can firmly fix the support member 300 to the vicinity of the second puncture site p2 located around the snuff box Sb.

[0139] As described above, the hemostatic device 10 according to this embodiment includes a cover member 100 configured to cover the first puncture site p1, and a pressing member 200 connected to the cover member 100 and configured to compress the first puncture site p1. The cover member 100 includes a main body 110 on which the pressing member 200 is located, a first band portion 410 configured to be positioned between the fingers of the patient and extending in a first direction from the main body 110, a second band portion 420 extending in a second direction different from the first direction from the main body 110, and a third band portion 430 facing the second band portion 420 with the pressing member 200 in between, and extending in a third direction different from the first and second directions from the main body 110. The main body 110 includes a support member 300 formed of a harder material than the pressing member 200 and configured to overlap the pressing member 200. The support member 300 is located on the side of the first band portion 410 and has an upper end portion 301 that forms the end of the support member 300, a lower end portion 302 that forms the end opposite to the upper end portion 301, and side portions 303 and 304 that connect the upper end portion 301 and the lower end portion 302. The support member 300 is configured such that the width w1 of the support member 300 decreases from the upper end portion 301 to the lower end portion 302, and the thickness t1 of the side portions 303 and 304 decreases from the upper end portion 301 to the lower end portion 302. In plan view, the lower end portion 302 has a straight, flat portion 302a, and the outer surface 300b of the support member 300 is curved toward the second band portion 420 and the third band portion 430.

[0140] With the hemostatic device 10 configured as described above, the support member 300, which is made of a harder material than the pressing member 200, is positioned to cover the first puncture site p1, which is formed at a predetermined location avoiding the metacarpal bone B1 of the index finger and the metacarpal bone B2 of the thumb of the right hand H1, together with the pressing member 200 when stopping bleeding from the first puncture site p1. The support member 300 can prevent the pressing member 200 from lifting off the patient's right hand H1 by pressing the pressing member 200 against the right hand H1. In addition, the width w1 of the support member 300 shortens from the upper end 301 to the lower end 302. Therefore, when the support member 300 is placed on the right hand H1, the support member 300 can be positioned along the metacarpal bone B1 of the index finger and the metacarpal bone B2 of the thumb. As a result, the hemostatic device 10 can securely wrap the second band portion 420 and the third band portion 430 around the outer circumference of the right hand H1. Furthermore, the support member 300 has a thickness t1 of the side portions 303 and 304 that thins from the upper end 301 to the lower end 302. In addition, the first band portion 410, which is configured to be positioned between the patient's fingers, extends from the upper end 301 side of the support member 300 and is configured to press the upper end 301 side of the support member 300 against the right hand H1. Therefore, when hemostasis is initiated with the hemostatic device 10 attached to the right hand H1, the pressing member 200 can apply appropriate force to the upper end 301 side of the support member 300. The force applied by the pressing member 200 causes the upper end 301 side of the support member 300 to lift up. As a result, the hemostatic device 10 can position the inner surface 300a of the support member 300 approximately parallel to the body surface of the right hand H1. Therefore, by fixing the band portions 410, 420, and 430 of the hemostatic device 10 to the right hand H1 with the pressing member 200 and the support member 300 positioned at the first puncture site p1, the compressive force of the pressing member 200 can be directed perpendicular to the first puncture site p1. As a result, the hemostatic device 10 can effectively apply compressive force to the first puncture site p1.

[0141] Furthermore, the hemostatic device 10 has a linear flat portion 302a at the lower end 302 of the support member 300 when viewed from above. The linear flat portion 302a located at the lower end 302 of the support member 300 prevents the lower end 302 of the support member 300 from digging into the body surface such as the wrist or forearm Ar when the patient performs actions such as twisting the wrist toward the back of the right hand H1 while the hemostatic device 10 is attached to the right hand H1. Therefore, the hemostatic device 10 can suppress the patient from feeling pain even when the patient moves their wrist or the like while the first puncture site p1 is being compressed and hemostatic by the pressing member 200.

[0142] Furthermore, the hemostatic device 10 has an outer surface 300b of the support member 300 that curves toward the second band portion 420 and the third band portion 430. Therefore, when the surgeon wraps the second band portion 420 and the third band portion 430, which are connected to the main body portion 110 of the cover member 100, around the outer circumference of the right hand H1, the second band portion 420 and the third band portion 430 are wrapped along the curved outer surface 300b of the support member 300. As a result, the hemostatic device 10 can increase the fixing force of the support member 300 and the pressing member 200 on the right hand H1.

[0143] Furthermore, the support member 300 has a position that, in a plan view, is the center of gravity G1 of the outer shape of the support member 300. The center of gravity G1 is located on the upper end 301 side of the intermediate portion 305, which is located between the upper end 301 and the lower end 302. The pressing member 200 is positioned on the cover member 100 with its center c1 located on the lower end 302 side of the center of gravity G1.

[0144] With the hemostatic device 10 configured as described above, when the expansion member 210 expands, the support member 300 is lifted from the body surface of the patient's right hand H1 at the lower end 302 side where the center c1 of the expansion member 210 is located, rather than at the upper end 301 side where the center of gravity G1 is located. Therefore, while the hemostatic device 10 is attached to the patient's right hand H1 and the expanded expansion member 210 is applying compressive force to the first puncture site p1, the hemostatic device 10 can prevent the lower end 302 of the support member 300, which is positioned on the patient's wrist or forearm Ar side, from digging into the body surface.

[0145] The support member 300 is symmetrical with respect to the center line C of the first band portion 410. The inner surface 300a of the support member 300 is curved convexly in the direction away from the pressing member 200.

[0146] With the hemostatic device 10 configured as described above, the support member 300 is symmetrical with respect to the center line C of the first band portion 410 in the main body portion 110. Therefore, by wrapping the band portions 420 and 430, which extend symmetrically with respect to the first band portion 410, around the patient's right hand H1, force can be applied evenly to the support member 300 in a symmetrical direction. As a result, the hemostatic device 10 can prevent the support member 300 from shifting position when it is positioned on the patient's right hand H1.

[0147] Furthermore, with the hemostatic device 10 configured as described above, the inner surface 300a of the support member 300 is curved convexly toward the direction away from the pressing member 200. Therefore, when the inner surface 300a of the support member 300 is positioned to overlap the inclined portion of the patient's right hand H1, the inner surface 300a of the support member 300 can be positioned along the patient's right hand H1. As a result, the hemostatic device 10 can be positioned to overlap the support member 300 on the first puncture site p1, regardless of the patient's dominant hand or the operator's positioning. Consequently, when the hemostatic device 10 applies pressure to the first puncture site p1 to stop bleeding using the expansion member 210, the support member 300 can be suitably positioned at a desired location near the first puncture site p1.

[0148] Furthermore, with the hemostatic device 10 configured as described above, the inner surface 300a of the support member 300 is curved convexly toward the direction away from the pressing member 200, so that the inner surface 300a of the support member 300 is positioned along the surface of the patient's right hand H1. When the expansion member 210 expands, the inner surface 300a of the support member 300 presses the expansion member 210 against the surface of the patient's right hand H1. As a result, the hemostatic device 10 applies a compressive force to the expansion member 210 in the direction toward the first puncture site p1 from the center side in the width direction of the inner surface 300a of the support member 300 and from the side portions 303 and 304 located at both ends in the width direction of the inner surface 300a of the support member 300. Therefore, the hemostatic device 10 can effectively increase the compressive force that the expansion member 210 applies to the first puncture site p1 compared to the case where the inner surface 300a of the support member 300 is formed with a flat surface shape.

[0149] The radius of curvature of the inner surface 300a of the upper end 301 of the support member 300 is smaller than the radius of curvature of the inner surface 300a of the lower end 302 of the support member 300.

[0150] With the hemostatic device 10 configured as described above, the support member 300 has a small radius of curvature on the inner surface 300a of the upper end 301, which is positioned on the fingertip side of the extensor pollicis longus tendon T1 and the extensor pollicis brevis tendon T2, and a large radius of curvature on the inner surface 300a of the lower end 302, which is positioned on the forearm Ar side of the extensor pollicis longus tendon T1 and the extensor pollicis brevis tendon T2, so as to correspond to changes in the distance between the extensor pollicis longus tendon T1 and the extensor pollicis brevis tendon T2. ​​Therefore, when the hemostatic device 10 is placed on the patient's right hand H1 to stop bleeding at the second puncture site p2, the support member 300 is positioned along the extensor pollicis longus tendon T1 and the extensor pollicis brevis tendon T2. ​​As a result, when stopping bleeding at the second puncture site p2, the hemostatic device 10 can firmly fix the support member 300 to the vicinity of the second puncture site p2 located around the snuff box Sb.

[0151] The pressing member 200 is an expandable member 210 that can be expanded by the injection of fluid. In its contracted state, the expandable member 210 has a vertical width wa passing through its center c1 and a horizontal width wb perpendicular to the vertical width wa and also passing through its center c1. The horizontal width wb is shorter than the vertical width wa. The support member 300 has an upper end 301 with a width w1' that is longer than the horizontal width wb of the expandable member 210, and a lower end 302 with a width w1'' that is shorter than the horizontal width wb of the expandable member 210.

[0152] With the hemostatic device 10 configured as described above, the width w1' of the upper end 301 of the support member 300 is longer than the width wb of the expansion member 210, and the width w1'' of the lower end 302 of the support member 300 is shorter than the width wb of the expansion member 210. Therefore, when the expansion member 210 placed at the first puncture site p1 expands, the expansion member 210 is supported by both ends in the width direction of the lower end 302 of the support member 300. As a result, the hemostatic device 10 can prevent the expansion member 210 from shifting toward the lower end 302 of the support member 300 when the expansion member 210 expands.

[0153] <Variation> Next, a modified version of the above-described embodiment will be explained. In the explanation of the modified version, explanations of the components and procedures for using hemostatic devices, etc., that have already been explained in the above-described embodiment will be omitted as appropriate. In addition, any content that is not specifically explained in the modified version may be the same as that of the above-described embodiment.

[0154] The hemostatic device according to the modified example differs from the hemostatic device 10 according to the previously described embodiment in the structure of the pressing member 200A (expansion member 210A). In the previously described embodiment, the expansion member 210 was made of a single sheet material connected to the main body 110 of the cover member 100 (see Figures 6 and 7). In this modified example, as shown in Figures 23 and 24, the expansion member 210A is made by connecting the edge 221 of the first sheet material 220 and the edge 231 of the second sheet material 230. The thickness of the first sheet material 220 is made thicker than the thickness of the second sheet material 230.

[0155] Figures 23 and 24 are partial cross-sectional views of a modified hemostatic device. Figure 23 shows the state before the expansion member 210A is expanded, and Figure 24 shows the state after the expansion member 210A has been expanded. Figures 23 and 24 are cross-sectional views corresponding to Figure 7 of the previously described embodiment.

[0156] As shown in Figures 23 and 24, the pressing member 200A is composed of an expandable member 210A that can be expanded by injecting fluid.

[0157] The expansion member 210A is formed by connecting an edge portion 221 located on the outer periphery of the first sheet material 220 and an edge portion 231 located on the outer periphery of the second sheet material 230. A lumen 210a is formed between the first sheet material 220 and the second sheet material 230. The edge portion 221 of the first sheet material 220 and the edge portion 231 of the second sheet material 230 can be connected, for example, by adhesive or fusion.

[0158] The first sheet material 220 is connected to the cover member 100 at a position overlapping with the support member 300. The expansion member 210A is fixed to the cover member 100 by the first sheet material 220 being connected to a part of the cover member 100 (the surface of the holding part 130). In this modified example, the first sheet material 220 is fixed to the cover member 100 by a part of the edge 221 of the first sheet material 220 being connected to the holding part 130. As shown in Figure 23, the first sheet material 220 and the holding part 130 are connected at two opposing positions.

[0159] The edge 231 of the second sheet material 230 is located at the edge of the support member 300 (the end in the width wb direction located on the side 303, 304 side of the support member 300). By positioning the edge 231 of the second sheet material 230 in this way, the edge of the expansion member 210A is supported by the edge of the support member 300. In this modified example, the edge 221 of the first sheet material 220 and the edge 231 of the second sheet material 230 are located at the edge of the support member 300 (the end in the width wb direction located on the side 303, 304 side of the support member 300).

[0160] As shown in Figure 24, the expansion member 210A is configured such that, when the expansion member 210A is expanded, the portion made of the second sheet material 230 undergoes greater expansion deformation than the portion made of the first sheet material 220. In this embodiment, the thickness of the second sheet material 230 is thinner than the thickness of the first sheet material 220. Therefore, when a fluid such as air is injected into the lumen 210a of the expansion member 210A, the portion made of the second sheet material 230 expands and deforms more than the portion made of the first sheet material 220.

[0161] In the contracted state of the expansion member 210A shown in Figure 23, the position where the first sheet material 220 and the second sheet material 230 are connected in the vertical direction shown in the figure, which is the expansion direction (the position where each edge portion 221, 231 is connected), is set to an off-center position on the side of the support member 300, rather than the center position of the entire expansion member 210A.

[0162] As shown in Figure 24, when the expansion member 210A expands, the edges 231 of the second sheet material 230 (in this modified example, the edges 221 and 231 of each sheet material 220 and 230) are pressed down by the edges of the support member 300. Therefore, the expansion member 210A expands uniformly in the lateral width wb direction of the support member 300. As a result, when the expansion member 210A applies compressive force to each puncture site p1 and p2, the amount of expansion in the lateral width wb direction of the support member 300 becomes uniform. Consequently, the shape of the expansion member 210A at maximum expansion and the compressive force applied to each puncture site p1 and p2 are stable. Furthermore, the expansion deformation of the first sheet material 220 is smaller than that of the second sheet material 230 when using the expansion member 210A. Therefore, when the expansion member 210A is expanded, it is possible to suppress deformation such that the portion of the expansion member 210A made of the first sheet material 220 protrudes excessively towards the inner surface 300a side of the support member 300. As a result, when the expansion member 210A is expanded, the contact area between the inner surface 300a of the support member 300 and the first sheet material 220 increases. The support member 300 can firmly press down on the expansion member 210 because the contact area between the inner surface 300a of the support member 300 and the expansion member 210A increases. Therefore, in the modified hemostatic device, the compressive force that the expansion member 210A applies to each puncture site p1 and p2 is further improved.

[0163] Although the hemostatic device according to the present invention has been described above through embodiments and modifications, the present invention is not limited to what has been described in the specification and can be modified as appropriate based on the claims.

[0164] The shape and dimensions of each part of the hemostatic device are not particularly limited and can be changed as appropriate, as long as they can compress the puncture site and stop bleeding by the pressure member placed at the puncture site.

[0165] The specific shapes (planar and cross-sectional shapes) of the expansion members and support members are not limited to those shown in the embodiments.

[0166] Furthermore, the configuration of the pressing member that applies compressive force to the puncture site is not limited to an expansion member (balloon). The pressing member can also be made of, for example, a resin material such as plastic, a member made of gel, an elastic material such as a sponge-like substance, an aggregate of fibers such as cotton, metal, a member having a predetermined three-dimensional shape (spherical, ellipsoidal, triangular pyramidal, etc.), or a combination of these as appropriate.

[0167] This application is based on Japanese Patent Application No. 2022-44656, filed on 18 March 2022, the disclosures of which are cited in their entirety by reference. [Explanation of symbols]

[0168] 10 Hemostatic devices 100 Cover component 110 Main body of cover component 110a Inner surface of the main body 110b Outer surface of the main body 120 Sheet Material 130 Holding part 200 Pressing member 200A Pressing Member 210 Expansion member 210A Expansion Member 210a Luminum of the expansion member 211 Edge of the expansion member 220 First sheet material 221 Edge of the first sheet material 230 Second sheet material 231 Edge of the second sheet material 260 Marker section 281 Injection part 300 Support Member 300a Inner surface of support member 300b Outer surface of the support member 301 Upper end 302 Lower end 302a Flat area 303 Side part 304 Side part 305 Middle section 410 First Belt Section 420 Second Belt Section 430 Third Belt Section 510 1st fixation site 520 Second fixation site 530 Third fixation site 540 4th fixation site 600 Introducers C Centerline of the first belt section c1 Center of the expansion member wa Vertical width of the extension member wb Width of the extension member t1 Thickness of the side section G1 Center of gravity of the support member w1 Width of the support member w1' Width of the upper edge w1'' width of the lower end H hand H1 right hand Ar forearm fb between fingers Sb Snuffbox B1 Metacarpal bone of the index finger B2 Metacarpal bone of the thumb T1 extensor pollicis longus tendon T2 extensor pollicis brevis tendon V1 blood vessel (distal radial artery) Arteries located in the V2 snuffbox. p1 1st puncture site (puncture site) p2 2nd puncture site (puncture site)

Claims

1. A cover member configured to cover the puncture site formed on the patient, It includes a pressing member connected to the cover member and configured to compress the puncture site, The cover member comprises a main body on which the pressing member is located, a first band portion configured to be positioned between the fingers of the patient and extending in a first direction from the main body, a second band portion extending in a second direction different from the first direction from the main body, and a third band portion facing the second band portion with the pressing member in between, and extending in a third direction different from the first and second directions from the main body, The main body is made of a material harder than the pressing member and includes a support member configured to overlap with the pressing member. The support member is located on the side of the first band and has an upper end that forms the end of the support member, a lower end that forms the end opposite to the upper end, and a side portion that connects the upper end and the lower end. The support member is configured such that the width of the support member decreases from the upper end to the lower end, and the thickness of the side portion decreases from the upper end to the lower end. The lower end portion has a straight, flat section in a plan view. A hemostatic device wherein the outer surface of the support member is curved toward the second band portion and the third band portion.

2. The support member has a position that, in a plan view, is the center of gravity of the outer shape of the support member. The center of gravity is located closer to the upper end than the intermediate portion located between the upper end and the lower end. The hemostatic device according to claim 1, wherein the pressing member is positioned on the cover member such that the center of the pressing member is located on the lower end side of the center of gravity.

3. The support member is symmetrical with respect to the center line of the first band portion in the main body portion. The hemostatic device according to claim 1 or claim 2, wherein the inner surface of the support member is curved in a convex shape toward the direction away from the pressing member.

4. The inner surface of the support member is curved in a convex shape toward the direction away from the pressing member. The hemostatic device according to claim 1 or claim 2, wherein the radius of curvature of the inner surface of the upper end is smaller than the radius of curvature of the inner surface of the lower end.

5. The pressing member is an expandable member that can be expanded by the injection of fluid. The aforementioned expansion member, in its contracted state, has a vertical width passing through the center of the expansion member, The width is perpendicular to the vertical width and passes through the center of the extension member, The aforementioned width is shorter than the aforementioned height. The hemostatic device according to claim 1 or claim 2, wherein the support member has a width at its upper end that is longer than the width and a width at its lower end that is shorter than the width.

6. The aforementioned expansion member is formed by connecting the edges of the first sheet material and the second sheet material. The first sheet material is connected to the cover member at a position overlapping with the support member. The edge of the second sheet material is located at the edge of the support member, The hemostatic device according to claim 5, wherein the expansion member is configured such that, when the expansion member is expanded, the portion made of the second sheet material expands and deforms more than the portion made of the first sheet material.

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