Liquid splash prevention device

Abstract

To provide a liquid splash prevention device capable of easily closing a suction flow path.SOLUTION: A liquid splash prevention device 1 includes a cylindrical body 10 for defining a through-hole 11 that penetrates in an axial direction and into which a needle member can be inserted, and a closing member 16 for closing a base end opening 12 of the through-hole, where the cylindrical body can define a storage space capable of storing liquid between the closing member and a biological surface in the axial direction, as a tip opening of the through-hole is closed by the biological surface. The closing member includes a valve body 30 through which the needle member can be pierced in the axial direction, and the valve body defines a suction flow path 33 that communicates with the through-hole and can suck the liquid through the through-hole, and is elastically deformable so as to close the suction flow path.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a liquid splash prevention device. [Background technology]

[0002] Conventionally, medical devices have been known that are used to prevent the scattering of contents that have flowed out from the punctured part in a procedure in which a needle member is punctured into the surface of a living body. Patent Document 1 describes this type of medical device.

[0003] The medical device described in Patent Document 1 has a cylindrical main body, a plate-shaped adhesive portion provided at the tip of the main body for adhering to the part to be punctured, and a head portion provided at the rear end of the main body and having a valve portion, and is designed so that a puncture needle can be inserted through the valve portion and the plate-shaped adhesive portion. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-334201 Summary of the Invention [Problem to be solved by the invention]

[0005] According to the medical instrument described in Patent Document 1, the contents that have flowed out from the puncture site can be aspirated through a through-hole formed in the plate-shaped adhesive part as an aspirating channel. In such a procedure, after aspirating the contents is completed, it is desirable to block the aspirating channel to prevent the aspirated contents from flowing back. However, the medical device described in Patent Document 1 still has room for improvement in terms of the ease of the operation of blocking the aspirating channel.

[0006] An object of the present disclosure is to provide a liquid splash prevention device that can easily block a suction flow path. [Means for solving the problem]

[0007] A liquid splash prevention device according to a first aspect of the present disclosure includes: (1) a cylindrical body that defines a through hole that penetrates in the axial direction and through which a needle member can be inserted; a blocking member that blocks a proximal end opening of the through hole, the cylindrical body can define a storage space capable of storing a liquid between the closure member and the biological surface in the axial direction by closing a distal end opening of the through hole on the biological surface, the closure member includes a valve body that can be pierced by the needle member in the axial direction, The valve body is a liquid splash prevention device that defines a suction flow path that is connected to the through hole and can suck liquid through the through hole, and is elastically deformable to close the suction flow path.

[0008] A liquid splash prevention device according to one embodiment of the present disclosure includes: (2) the suction passage includes an opening / closing passage extending along the axial direction, The liquid splash prevention device described in (1) above is such that the valve body is elastically deformable so as to block the opening and closing flow path by being compressed in either or both of the axial direction and the radial direction of the cylindrical body.

[0009] A liquid splash prevention device according to one embodiment of the present disclosure includes: (3) the valve element is elastically deformable by being compressed in the axial direction so as to close the opening / closing flow path, the blocking member includes a fixed body fixed to the cylindrical body, The liquid splash prevention device according to (2) above, wherein the fixed body has a protruding portion that protrudes radially outward from the cylindrical body.

[0010] A liquid splash prevention device according to one embodiment of the present disclosure includes: (4) The fixed body defines a fixed through-hole that penetrates in the axial direction, the fixed body includes a support portion that defines a support hole that penetrates the fixed body in the axial direction and constitutes at least a part of the fixed through hole, the valve body includes a truncated cone-shaped body portion whose diameter decreases toward a tip end side in the axial direction, whose maximum diameter is greater than a maximum width of the support hole, and whose minimum diameter is smaller than a minimum width of the support hole, the valve body is fitted into the support hole such that a side surface of the body portion abuts against an inner surface of the support portion that defines the support hole, The liquid splash prevention device described in (3) above is such that the valve body is pressed toward the axial tip side against the support part and compressed in the axial direction, and is pressed radially inward by the inner surface of the support part and compressed in the radial direction, thereby elastically deforming to block the opening and closing flow path.

[0011] A liquid splash prevention device according to one embodiment of the present disclosure includes: (5) a handle that is disposed at a distance from the fixed body toward a base end in the axial direction and that can abut against the fixed body by pressing and compressing the valve body toward a tip end in the axial direction; The liquid splash prevention device described in (3) or (4) above is provided with a locking mechanism that keeps the fixed body and the handle in contact with each other and keeps the valve body in an elastically deformed state so as to block the opening and closing flow path.

[0012] A liquid splash prevention device according to one embodiment of the present disclosure includes: (6) The liquid splash prevention device according to any one of (1) to (5) above, wherein the blocking member connects the through hole and the suction channel and defines a reservoir space capable of storing liquid.

[0013] A liquid splash prevention device according to one embodiment of the present disclosure includes: (7) A liquid splash prevention device according to any one of (1) to (6) above, comprising an extension tube that extends inside the through hole along the axial direction and defines an extended suction flow path that connects the through hole and the suction flow path.

[0014] A liquid splash prevention device according to one embodiment of the present disclosure includes: (8) The liquid splash prevention device is described in any one of (1) to (6) above, wherein the peripheral wall defining the through hole of the cylindrical body defines an extended suction flow path therein that connects the through hole and the suction flow path. [Effects of the Invention]

[0015] According to the present disclosure, it is possible to provide a liquid splash prevention device that can easily block a suction flow path. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a diagram showing a liquid splash prevention device according to an embodiment of the present disclosure. FIG. [Figure 2] 2 is an enlarged view of a part of the liquid splash prevention device shown in FIG. 1. FIG. [Figure 3] 2 is a diagram showing how the valve element shown in FIG. 1 is elastically deformed to close the opening and closing flow passage when compressed in both the axial and radial directions. FIG. [Figure 4A] FIG. 2 is a diagram showing details of the handle and the fixed body shown in FIG. 1, showing a state in which the handle and the fixed body are spaced apart in the axial direction. [Figure 4B] 4B is a diagram showing a state in which the valve body is compressed in the axial direction from the state shown in FIG. 4A, causing the handle and the fixed body to come into contact with each other. FIG. [Figure 5A] 2 is a diagram showing a state in which the liquid splash prevention device shown in FIG. 1 is attached to the surface of a living body, and the distal end opening of the through-hole is closed by the surface of the living body. [Figure 5B] 5B is a diagram showing a state in which, from the state shown in FIG. 5A, a needle member is inserted into the surface of the living body through the valve body and the through-hole, and blood inside the living body is sucked through the needle member. [Figure 5C] 5C is a diagram showing a state in which the needle member has been removed from the surface of the living body and the liquid splash prevention device from the state shown in FIG. 5B. [Figure 5D] 5D is a diagram showing a state in which blood accumulated in the storage space is sucked through the extended suction channel and stored in the reserve space, following the state shown in FIG. 5C. [Figure 5E]5D, the valve body is pressed by the handle toward the distal end in the axial direction relative to the fixed body, and is compressed, and elastically deformed to close the suction flow path. FIG. [Figure 6A] 2 is a diagram showing how the valve element shown in FIG. 1 is elastically deformed so as to close the opening and closing flow path when compressed only in the radial direction. FIG. [Figure 6B] 2 is a diagram showing how the valve element shown in FIG. 1 is elastically deformed so as to close the opening and closing flow path when compressed only in the axial direction. FIG. [Figure 7] FIG. 10 is a diagram showing a part of a liquid splash prevention device according to a second embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, an embodiment of a liquid splash prevention device according to the present disclosure will be described with reference to the drawings. In each drawing, the same components are assigned the same reference numerals.

[0018] First Embodiment FIG. 1 is a diagram showing a liquid splash prevention device 1 as one embodiment of the liquid splash prevention device according to the present disclosure. FIG. 2 is a diagram showing an enlarged portion of the liquid splash prevention device 1. The liquid splash prevention device 1 is used, for example, when inserting a needle member X (see FIG. 5B) into an organ with a high concentration of blood vessels, such as the liver or kidney. In this embodiment, an example is described in which the liquid splash prevention device 1 is used in a biopsy in which blood BL (see FIG. 5B, etc.) from a living body is aspirated through a needle member X inserted into a living body surface BS. However, the method of using the liquid splash prevention device according to the present disclosure is not limited to such a biopsy. The liquid splash prevention device according to the present disclosure may also be used for other purposes, such as inserting a needle member X into a living body surface BS to administer a drug.

[0019] As shown in FIG. 1, the liquid splash prevention device 1 of this embodiment includes a cylindrical body 10, a closing member 16, a handle 40, and an extension tube 50.

[0020] [Cylinder 10] The cylindrical body 10 has a cylindrical shape. For ease of explanation, the direction along the central axis O of the cylindrical body 10 will be referred to as the "axial direction A." Furthermore, the radial direction B of a circle centered on the central axis O of the cylindrical body 10 will be referred to as the "radial direction B."

[0021] The cylindrical body 10 defines a through hole 11 that penetrates in the axial direction A. The through hole 11 has a base end opening 12 that opens at one end of the cylindrical body 10 in the axial direction A, and a tip end opening 13 that opens at the other end of the cylindrical body 10 in the axial direction A. The base end opening 12 is blocked by a blocking member 16. The tip end opening 13 is not blocked but is open. For ease of explanation, the direction from the tip end opening 13 toward the base end opening 12 in the axial direction A will be referred to as the "base end side A1," and the direction from the base end opening 12 toward the tip end opening 13 in the axial direction A will be referred to as the "tip side A2."

[0022] A needle member X can be inserted through the through-hole 11. More specifically, the needle member X inserted from the base end opening 12 of the through-hole 11 can be protruded from the tip end opening 13.

[0023] The cylindrical body 10 has an inner surface 14 that defines the through-hole 11. The inner surface 14 of the cylindrical body 10 of this embodiment is a cylindrical surface that extends in the axial direction A with the central axis O as its center.

[0024] As will be described in more detail below, the cylindrical body 10 can define a storage space 15 capable of containing liquid between the closure member 16 in the axial direction A and the biological surface BS by blocking the tip opening 13 of the through hole 11 with the biological surface BS (see Figures 5A to 5E).

[0025] The cylindrical body 10 may be made of a material such as a hard resin or metal.

[0026] [Blocking member 16] As described above, the closing member 16 closes the proximal opening 12 of the through-hole 11. The closing member 16 of this embodiment includes a fixed body 17 and a valve body 30.

[0027] (Fixed body 17) The fixed body 17 is fixed to the cylindrical body 10. More specifically, the fixed body 17 of this embodiment is attached and fixed to an end portion on the base end side A1 of the cylindrical body 10. As shown in FIG. 2 , the fixed body 17 of this embodiment has a protruding portion 18 that protrudes outward in the radial direction B from the cylindrical body 10. The protruding portion 18 of this embodiment has a substantially cylindrical shape that is one size larger than the cylindrical body 10 in the radial direction B.

[0028] The fixed body 17 of this embodiment defines a fixed through-hole 20 that penetrates in the axial direction A. A needle member X (see FIG. 5B) can be inserted into the fixed through-hole 20. The fixed body 17 of this embodiment includes a support portion 21 that forms an end portion of the base end side A1 of the fixed body 17, an intermediate portion 24 that is continuous with the support portion 21 and extends from the support portion 21 toward the tip end side A2, and a bottom portion 27 that is continuous with the intermediate portion 24 and forms an end portion of the fixed body 17 on the tip end side A2.

[0029] The support portion 21 of this embodiment has a substantially circular flat plate shape. The support portion 21 of this embodiment is arranged so that its thickness direction substantially coincides with the axial direction A. Furthermore, the support portion 21 of this embodiment is arranged so that its central axis substantially coincides with the central axis O of the cylindrical body 10. The support portion 21 of this embodiment defines a support hole 22 that penetrates in the axial direction A. In this embodiment, the inner surface 23 of the support portion 21 that defines the support hole 22 is a tapered surface that extends so as to decrease in diameter from the base end side A1 toward the tip end side A2.

[0030] The bottom portion 27 of this embodiment has a generally circular flat plate shape. The bottom portion 27 of this embodiment is disposed so that its thickness direction generally coincides with the axial direction A. Furthermore, the bottom portion 27 of this embodiment is disposed so that its central axis generally coincides with the central axis O of the cylindrical body 10. The bottom portion 27 of this embodiment defines a bottom hole 28a penetrating in the axial direction A. In this embodiment, the inner surface 29 of the bottom portion 27 that defines the bottom hole 28a is a tapered surface that extends so as to decrease in diameter from the base end side A1 toward the tip end side A2. Furthermore, the bottom portion 27 of this embodiment defines a mounting hole 28b penetrating in the axial direction A in addition to the bottom hole 28a. An extension tube 50, which will be described later, is attached to the mounting hole 28b.

[0031] The intermediate portion 24 of this embodiment has a cylindrical shape. The intermediate portion 24 of this embodiment is arranged so that its central axis substantially coincides with the central axis O of the cylindrical body 10. Furthermore, the intermediate portion 24 of this embodiment connects the outer edge of the support portion 21 and the outer edge of the bottom portion 28. The intermediate portion 24 of this embodiment defines an intermediate hole 25 whose base end side A1 is continuous with the support hole 22 and whose tip end side A2 is continuous with the bottom hole 28a. The maximum width of the intermediate hole 25 of this embodiment is greater than the maximum width of the support hole 22 and the maximum width of the bottom hole 28a. In this embodiment, the inner surface 26 of the intermediate portion 24 that defines the intermediate hole 25 is a cylindrical surface extending in the axial direction A with the central axis O as its center.

[0032] The protrusion 18 of this embodiment is composed of an outer edge portion that is a part of the support portion 21, the entire intermediate portion 24, and an outer edge portion that is a part of the bottom portion 27. The fixing through-hole 20 of this embodiment is composed of the support hole 22, the intermediate hole 25, and the bottom hole 28a.

[0033] The material for forming the fixed body 17 may be, for example, a hard resin, a metal, or the like.

[0034] (Valve body 30) A needle member X (see FIG. 5B) can be inserted through the valve body 30 in the axial direction A. In the liquid splash prevention device 1, the needle member X can be inserted through the through-hole 11 of the cylindrical body 10 by inserting the needle member X through the valve body 30.

[0035] The valve element 30 of this embodiment is fitted into the fixed through-hole 20 of the fixed body 17. More specifically, the valve element 30 of this embodiment has a truncated conical body 31 whose diameter decreases toward the tip side A2 in the axial direction A. The maximum diameter of the body 31 of this embodiment is greater than the maximum width of the support hole 22 of the support part 21 of the fixed body 17. Furthermore, the minimum diameter of the body 31 of this embodiment is smaller than the minimum width of the support hole 22 of the support part 21 of the fixed body 17. The valve element 30 of this embodiment is fitted into the support hole 22 so that the side surface 32a of the body 31 abuts against the inner surface 23 of the support part 21 that defines the support hole 22. Furthermore, the valve element 30 of this embodiment is fitted into the bottom hole 28a so that the side surface 32a of the body 31 abuts against the inner surface 29 of the bottom part 27 that defines the bottom hole 28a. That is, the valve body 30 of this embodiment is fitted into the fixing through-hole 20 so that the side surface 32a of the body portion 31 abuts against the inner surface 23 of the support portion 21 of the fixed body 17 and the inner surface 29 of the bottom portion 27 of the fixed body 17. The maximum width of the support hole 22 is the maximum length of the support hole 22 in the radial direction B. The minimum width of the support hole 22 is the minimum length of the support hole 22 in the radial direction B.

[0036] The valve body 30 of this embodiment is entirely composed of the body portion 31. That is, the valve body 30 of this embodiment has a truncated cone shape whose diameter decreases toward the tip side A2 in the axial direction A. However, the valve body 30 may include other parts in addition to the body portion 31 and is not limited to the configuration of this embodiment. Furthermore, in the valve body 30 of this embodiment, the portion through which the needle member X is inserted is a solid portion without a hollow portion defined therein, but the portion of the valve body 30 through which the needle member X is inserted may have a hollow portion defined therein. This makes it easier to insert the needle member X into the valve body 30.

[0037] In this embodiment, the fixed body 17 and the valve body 30 define a reserve space 55 capable of storing liquid between them when the valve body 30 is fitted into the fixed through-hole 20. More specifically, the reserve space 55 in this embodiment is an annular space defined by the side surface 32a of the body 31, the lower surface of the support portion 21 facing the distal end side A2, the inner surface 26 of the intermediate portion 24, and the upper surface of the bottom portion 27 facing the proximal end side A1. The reserve space 55 communicates with the through-hole 11 and a suction flow path 33 of the valve body 30, which will be described later. More specifically, the reserve space 55 in this embodiment communicates with the through-hole 11 via an extension suction flow path 51 of the extension tube 50, which will be described later. The reserve space 55 in this embodiment also communicates with a suction flow path 33 of the valve body 30, which will be described later.

[0038] The valve body 30 defines a suction flow path 33. The suction flow path 33 is connected to the through hole 11 and can suction liquid through the through hole 11. More specifically, the suction flow path 33 of this embodiment includes a base-end opening 34 that opens to the upper surface 32b on the base-end side A1 of the valve body 30 and a tip-end opening 35 that opens to the side surface 32a of the valve body 30 at a position on the tip side A2 in the axial direction A relative to the base-end opening 34, and extends from the base-end opening 34 to the tip-end opening 35. The tip-end opening 35 of the suction flow path 33 of this embodiment is connected to the reserve space 55. As described above, the reserve space 55 is connected to the through hole 11. That is, the suction flow path 33 of this embodiment is connected to the through hole 11 via the reserve space 55. In the liquid splash preventer 1 of this embodiment, by applying a suction pressure that sucks liquid to the suction flow path 33 through the base-end opening 34, liquid can be suctioned through the reserve space 55 and the through hole 11.

[0039] The suction flow path 33 of this embodiment includes an open / close flow path 36 extending along the axial direction A. The suction flow path 33 of this embodiment is entirely composed of the open / close flow path 36. That is, the suction flow path 33 of this embodiment extends entirely along the axial direction A. Note that "extending along the axial direction A" does not necessarily mean that the open / close flow path 36 extends parallel to the axial direction A, but also means that the open / close flow path 36 extends approximately parallel to the axial direction A, such as extending in a direction inclined at a predetermined angle or less (for example, 30 degrees or less) with respect to the axial direction A. However, the suction flow path 33 may include another flow path in addition to the open / close flow path 36 extending along the axial direction A.

[0040] 3 is a diagram showing how the valve element 30 is elastically deformed to block the on-off flow path 36 by being compressed in both the axial direction A and the radial direction B. As shown in FIG. 3, the valve element 30 is elastically deformable to block the suction flow path 33. More specifically, the valve element 30 of this embodiment is elastically deformable to block the on-off flow path 36 by being compressed in either or both of the axial direction A and the radial direction B. Even more specifically, the valve element 30 of this embodiment is pressed toward the tip side A2 in the axial direction A against the support part 21 and compressed in the axial direction A, and is pressed inward in the radial direction B by the inner surface 23 of the support part 21 and compressed in the radial direction B, thereby elastically deforming to block the on-off flow path 36.

[0041] The valve body 30 of this embodiment can close the hole formed by piercing the needle member X (see FIG. 5B) by elastically deforming due to a restoring force. The material forming the valve body 30 may be, for example, rubber.

[0042] [Handle 40] The handle 40 is disposed at a distance from the fixed body 17 on the base end side A1 in the axial direction A. In this embodiment, the handle 40 protrudes outward from the valve body 30 in the radial direction B and is attached to the valve body 30 so as to cover the end of the valve body 30 on the base end side A1.

[0043] The handle 40 of this embodiment defines an insertion hole 41 and a suction hole 42 that penetrate in the axial direction A. The top surface 32b of the base end side A1 of the valve body 30 is located on the tip side A2 of the insertion hole 41. In the liquid splash prevention device 1 of this embodiment, the needle member X can be pierced through the valve body 30 through the insertion hole 41 of the handle 40, and the needle member X can be inserted into the through-hole 11. The suction hole 42 is connected to the base end opening 34 of the suction flow path 33 of the valve body 30. In the liquid splash prevention device 1 of this embodiment, liquid can be suctioned from the suction flow path 33 through the suction hole 42 of the handle 40.

[0044] The handle 40 can press the valve element 30 toward the tip side A2 in the axial direction A to compress it. In other words, the valve element 30 of this embodiment is pressed toward the tip side A2 in the axial direction A via the handle 40 and compressed. The handle 40 can abut against the fixed body 17 by pressing the valve element 30 toward the tip side A2 in the axial direction A to compress it. The valve element 30 of this embodiment is configured so that the suction flow path 33 is closed when the handle 40 is in abutment against the fixed body 17.

[0045] 4A and 4B are diagrams illustrating the details of the handle 40 and the fixed body 17 of this embodiment. Specifically, FIG. 4A illustrates a state in which the handle 40 and the fixed body 17 are spaced apart in the axial direction A. FIG. 4B illustrates a state in which the valve element 30 is compressed in the axial direction A from the state illustrated in FIG. 4A , thereby bringing the handle 40 and the fixed body 17 into contact with each other. As illustrated in FIGS. 4A and 4B , the fixed body 17 and the handle 40 of this embodiment are provided with a locking mechanism 60 that maintains their contact with each other and maintains the valve element 30 in an elastically deformed state so as to close the opening / closing flow path 36. More specifically, the handle 40 of this embodiment is provided with a locking protrusion 61 that can be locked in a locking recess 62 of the fixed body 17. The locking mechanism 60 of this embodiment is composed of the locking recess 62 of the fixed body 17 and the locking protrusion 61 of the handle 40. When the handle 40 and the fixed body 17 are spaced apart in the axial direction A, the locking protrusion 61 is not locked in the locking recess 62. On the other hand, when the handle 40 presses and compresses the valve body 30 toward the tip side A2 in the axial direction A and the handle 40 abuts against the fixed body 17, the locking protrusion 61 is locked in the locking recess 62. When the locking protrusion 61 is locked in the locking recess 62, relative movement of the fixed body 17 and the handle 40 in the axial direction A is restricted. This allows the fixed body 17 and the handle 40 to be maintained in a state in which they abut against each other. As a result, the valve body 30 can be maintained in an elastically deformed state so as to close the opening / closing flow path 36.

[0046] The handle 40 may be made of a material such as a hard resin or metal.

[0047] [Extension tube 50]

[0048] The extension tube 50 defines an extended suction flow path 51. The extended suction flow path 51 extends inside the through hole 11 along the axial direction A and connects the through hole 11 to the suction flow path 33. More specifically, the extension tube 50 of this embodiment is a tubular body that is attached to the mounting hole 28b in the bottom 27 of the fixed body 17 and extends inside the through hole 11 along the axial direction A. The extended suction flow path 51 of this embodiment penetrates the extension tube 50 in the extension direction. The extended suction flow path 51 of this embodiment includes a base end opening 52 that opens inside the reserve space 55 and a tip end opening 53 that opens inside the through hole 11.

[0049] The extension tube 50 may be made of a material such as a hard or flexible resin, a metal, or the like.

[0050] (How to use) Next, an example of a method of using the liquid splash prevention device 1 will be described with reference to FIGS. 5A to 5E. FIGS. 5A to 5E are explanatory diagrams illustrating an example of a method of using the liquid splash prevention device 1. Specifically, FIG. 5A shows a state in which the liquid splash prevention device 1 is attached to a biological surface BS and the distal end opening 13 of the through-hole 11 is blocked by the biological surface BS. FIG. 5B shows a state in which, from the state shown in FIG. 5A, the needle member X is punctured into the biological surface BS through the valve body 30 and the through-hole 11, and blood BL from within the living body is aspirated through the needle member X. FIG. 5C shows a state in which, from the state shown in FIG. 5B, the needle member X has been removed from the biological surface BS and the liquid splash prevention device 1. FIG. 5D shows a state in which, from the state shown in FIG. 5C, the blood BL accumulated in the storage space 15 is aspirated through the extended suction flow path 51 and stored in the reserve space 55. Figure 5E shows the state in which the valve body 30 is pressed toward the tip side A2 in the axial direction A against the fixed body 17 by the handle 40 from the state shown in Figure 5D, thereby being compressed and elastically deformed so as to block the suction flow path 33.

[0051] As shown in Fig. 5A, when using the liquid splash prevention device 1, the liquid splash prevention device 1 is first attached to the biological surface BS. Specifically, the end of the distal end side A2 of the cylindrical body 10 is abutted against the biological surface BS, and the distal opening 13 of the through-hole 11 is closed by the biological surface BS. As a result, the cylindrical body 10 defines a storage space 15 capable of containing liquid between the closing member 16 in the axial direction A and the biological surface BS. The storage space 15 is defined by the inner surface 14 of the cylindrical body 10 and the biological surface BS.

[0052] Then, as shown in FIG. 5B , the needle member X is inserted into the biological surface BS through the valve body 30 and the through-hole 11 of the cylindrical body 10. Specifically, the needle member X is inserted into the insertion hole 41 of the handle 40 and pierces the valve body 30. The needle member X that has pierced the valve body 30 is then advanced further toward the distal end A2 in the axial direction A and inserted into the through-hole 11 so that the needle member X protrudes from the distal end opening 13 of the through-hole 11. This allows the needle member X to pierce the biological surface BS. Then, while the needle member X is piercing the biological surface BS, blood BL from the biological body is aspirated through the needle member X. In the example shown in FIG. 5B , a syringe Y serving as an aspirator connected to the proximal end of the needle member X is operated to aspirate the blood BL. At this time, bleeding occurs from the punctured portion of the biological surface BS due to the needle member X puncturing the biological surface BS. The bleeding blood BL accumulates in the storage space 15.

[0053] 5C, the needle member X is removed from the biological surface BS and the liquid splash prevention device 1. At this time, blood BL that has bled from the punctured portion of the biological surface BS remains accumulated in the storage space 15. In addition, the hole formed in the valve body 30 by the puncture of the needle member X is elastically deformed and closed by the restoring force of the valve body 30.

[0054] 5D, the blood BL accumulated in the storage space 15 is sucked through the extended suction flow path 51. Specifically, a syringe Z serving as a suction device attached to the suction hole 42 of the handle 40 is operated to apply suction pressure to the suction flow path 33 of the valve body 30. This creates a negative pressure in the reserve space 55 and the extended suction flow path 51. As a result, the blood BL accumulated in the storage space 15 is sucked through the extended suction flow path 51 and stored in the reserve space 55. Note that, although an example in which the blood BL is sucked after the needle member X is removed is shown here, the blood BL may also be sucked in a similar manner without removing the needle member X.

[0055] 5E, the handle 40 presses the valve element 30 toward the tip side A2 in the axial direction A against the fixed body 17, compressing the valve element 30 in the axial direction A. As a result, the valve element 30 is pressed inward in the radial direction B by the inner surface 23 of the support part 21 of the fixed body 17, compressed in the radial direction B, and elastically deforms so as to close the opening / closing flow path 36. This allows the suction flow path 33 of the valve element 30 to be closed.

[0056] Thereafter, the liquid scattering prevention device 1 is removed from the biological surface BS while the valve body 30 is maintained in an elastically deformed state so as to close the on-off flow path 36. In this way, the liquid scattering prevention device 1 can be removed from the biological surface BS while suppressing backflow of the aspirated blood BL.

[0057] (Action and effect) As described above, the cylindrical body 10 can define a storage space 15 capable of storing a liquid between the closure member 16 and the biological surface BS in the axial direction A by blocking the distal end opening 13 of the through-hole 11 with the biological surface BS. Therefore, when the needle member X punctures the biological surface BS through the valve body 30 of the closure member 16 and the through-hole 11, blood BL bleeding from the punctured portion of the biological surface BS can be contained in the storage space 15. This prevents the blood BL bleeding from the punctured portion of the biological surface BS from scattering outside the storage space 15.

[0058] The valve body 30 defines a suction flow path 33 that is connected to the through hole 11 and can suck liquid through the through hole 11. This allows the liquid to be sucked through the through hole 11 by applying a suction pressure that sucks the liquid to the suction flow path 33.

[0059] The valve body 30 is elastically deformable so as to close the suction flow path 33. Thus, by performing an operation to elastically deform the valve body 30, the suction flow path 33 can be easily closed.

[0060] The suction flow path 33 includes an opening / closing flow path 36 extending along the axial direction A. The valve element 30 is elastically deformable so as to close the opening / closing flow path 36 by being compressed in either or both of the axial direction A and the radial direction B. By configuring it as described above, it is possible to easily realize a valve element 30 that is elastically deformable so as to close the suction flow path 33.

[0061] The valve element 30 of this embodiment can be elastically deformed to close the on-off flow path 36 when compressed in the axial direction A. The closure member 16 includes a fixed body 17 fixed to the cylindrical body 10. The fixed body 17 includes a protruding portion 18 that protrudes outward from the cylindrical body 10 in the radial direction B. With the above configuration, an operator can, for example, place their finger on the protruding portion 18 of the fixed body 17 from the tip side A2 in the axial direction A, and while supporting the liquid splash prevention device 1, press the valve element 30 toward the tip side A2 in the axial direction A to compress the valve element 30 in the axial direction A. This improves the ease of operation when compressing the valve element 30 in the axial direction A.

[0062] The fixed body 17 of this embodiment includes a support portion 21 that defines a support hole 22 that penetrates in the axial direction A. The valve element 30 includes a truncated conical body portion 31 that tapers toward the tip side A2 in the axial direction A, has a maximum diameter greater than the maximum width of the support hole 22, and a minimum diameter smaller than the minimum width of the support hole 22. The valve element 30 is fitted into the support hole 22 so that a side surface 32a of the body portion 31 abuts against an inner surface 23 of the support portion 21 that defines the support hole 22. When the valve element 30 is pressed toward the tip side A2 in the axial direction A relative to the fixed body 17 and compressed in the axial direction A, the valve element 30 is pressed inward in the radial direction B by the inner surface 23 of the support portion 21 and compressed in the radial direction B, elastically deforming to block the opening / closing flow path 36. With the above configuration, a valve element 30 that can elastically deform to block the suction flow path 33 can be easily realized.

[0063] The liquid splash prevention device 1 of this embodiment is provided with a handle 40 that is disposed at a distance from the fixed body 17 on the base end side A1 in the axial direction A and that can abut against the fixed body 17 by pressing and compressing the valve element 30 toward the tip end side A2 in the axial direction A. The fixed body 17 and the handle 40 are provided with a locking mechanism 60 that maintains their abutting state and maintains the valve element 30 in an elastically deformed state that closes the on-off flow path 36. With the above-described configuration, it is not necessary to continue pressing the valve element 30 toward the tip end side A2 in the axial direction A when maintaining the valve element 30 in an elastically deformed state that closes the on-off flow path 36. This makes it easy to maintain the valve element 30 in an elastically deformed state that closes the on-off flow path 36.

[0064] The closure member 16 of this embodiment defines a reserve space 55 that connects the through-hole 11 and the suction flow path 33 and is capable of storing liquid. In this manner, when a suction pressure for sucking liquid is applied to the suction flow path 33 and liquid is sucked through the through-hole 11, the sucked liquid can be stored in the reserve space 55. This eliminates the need to prepare a container for storing the sucked liquid separately from the liquid splash prevention device 1, improving the operability of the liquid splash prevention device 1.

[0065] The liquid splash prevention device 1 of this embodiment includes an extension tube 50 that extends inside the through hole 11 along the axial direction A and defines an extended suction flow path 51 that connects the through hole 11 and the suction flow path 33. This makes it possible to reduce the suction pressure acting on the suction flow path 33 to suck liquid through the through hole 11, compared to when the liquid splash prevention device 1 does not include the extension tube 50. This allows the liquid to be sucked through the through hole 11 efficiently.

[0066] The above-described configuration of the liquid splash prevention device is merely an example. For example, although the closing member 16 of this embodiment includes the fixed body 17, the closing member does not necessarily need to include the fixed body 17. In this case, the valve body 30 may be attached directly to the cylindrical body 10. In this case, for example, the body 31 of the valve body 30 may be configured so that its maximum diameter is larger than the maximum width of the through hole 11 of the cylindrical body 10 and its minimum diameter is smaller than the minimum width of the through hole 11 of the cylindrical body 10. The valve body 30 may then be fitted into the through hole 11 of the cylindrical body 10 so that the side surface 32a of the body 31 abuts against the opening edge of the base-end opening 12 of the through hole 11 of the cylindrical body 10. In this way, the valve element 30 is pressed toward the tip side A2 in the axial direction A relative to the cylindrical body 10 and compressed in the axial direction A, and is pressed inward in the radial direction B by the opening edge of the base-end opening 12 of the through-hole 11 of the cylindrical body 10 and compressed in the radial direction B, thereby being able to elastically deform so as to close the opening / closing flow path 36. This makes it easy to realize a valve element 30 that can elastically deform so as to close the suction flow path 33.

[0067] Although the closing member 16 in this embodiment defines the reserve space 55, the closing member does not have to define the reserve space 55. In this case, the suction flow path 33 of the valve body 30 and the extension suction flow path 51 of the extension tube 50 may be directly connected, for example.

[0068] Although the liquid splash prevention device 1 of this embodiment includes an extension tube 50 that defines the extended suction flow path 51, the liquid splash prevention device does not necessarily have to include the extension tube 50. In this case, the through hole 11 of the cylindrical body 10 and the suction flow path 33 of the valve body 30 may be directly connected, for example. Furthermore, although the liquid splash prevention device 1 of this embodiment includes only one extension tube 50, the liquid splash prevention device 1 may also include, for example, multiple extension tubes 50.

[0069] In this embodiment, the handle 40 has a locking protrusion 61 and the fixed body 17 has a locking recess 62, but it is also possible for the handle 40 to have the locking recess 62 and the fixed body 17 to have the locking protrusion 61. Also, in this embodiment, the locking mechanism 60 is composed of the locking protrusion 61 and the locking recess 62, but the configuration of the locking mechanism is not limited to this as long as it can maintain the fixed body 17 and the handle 40 in a state of abutting against each other. Furthermore, the liquid splash prevention device does not have to have a locking mechanism.

[0070] The valve element 30 of this embodiment is pressed against the fixed body 17 toward the tip side A2 in the axial direction A and compressed in the axial direction A, and is pressed inward in the radial direction B by the inner surface 23 of the support part 21 and compressed in the radial direction B, elastically deforming to close the on-off flow path 36. In other words, the valve element 30 of this embodiment is elastically deformable to close the on-off flow path 36 by being compressed in both the axial direction A and the radial direction B. However, the method of closing the on-off flow path 36 is not limited to this.

[0071] 6A is a diagram showing how the valve body 30 is compressed only in the radial direction B, thereby elastically deforming to block the on-off flow path 36. As shown in FIG. 6A, in the liquid splash prevention device according to the present disclosure, the valve body 30 may be compressed only in the radial direction B, thereby elastically deforming to block the on-off flow path 36. In this case, the fixed body 17 may not have the protrusion 18. Also, in this case, the liquid splash prevention device may not have the handle 40, or the handle 40 may be configured to be deformable so as to follow the elastic deformation of the valve body 30.

[0072] 6B is a diagram showing how the valve element 30 is elastically deformed to block the on-off flow path 36 by being compressed only in the axial direction A. As shown in FIG. 6B, in the liquid splash prevention device according to the present disclosure, the valve element 30 may be elastically deformed to block the on-off flow path 36 by being compressed only in the axial direction A and expanded in the radial direction B. In this case, the valve element 30 may not be fitted into the fixing through-hole 20 of the fixing body 17 and attached to the fixing body 17, but may be attached to the fixing body 17 by being abutted against the end of the base end side A1 of the fixing body 17, for example.

[0073] In this embodiment, the valve element 30 has a truncated cone-shaped body portion 31, but in cases where the valve element 30 is elastically deformed only in either the axial direction A or the radial direction B as in the examples shown in Figures 6A and 6B, the valve element 30 does not need to have a truncated cone-shaped body portion 31. In this case, although the entire valve element 30 has a truncated cone shape in this embodiment, the valve element may have, for example, a cylindrical shape, an elliptical cylindrical shape, a semi-cylindrical shape, a polygonal cylindrical shape, or a combination of a plurality of these shapes.

[0074] Second Embodiment Next, a liquid splash prevention device 100 as a second embodiment will be described with reference to Fig. 7. Fig. 7 is a diagram showing a portion of the liquid splash prevention device 100. The liquid splash prevention device 100 of this embodiment differs from the liquid splash prevention device 1 of the first embodiment described above (see Fig. 1, etc.) in the configuration for defining the extended suction flow path, but has other configurations in common. Here, the above-mentioned differences will be mainly described, and a description of the configurations in common with the liquid splash prevention device 1 will be omitted.

[0075] 7, the liquid splash prevention device 100 of this embodiment does not include the extension tube 50 that defines the extended suction flow path 51 that is included in the liquid splash prevention device 1 of the first embodiment. Instead, in the liquid splash prevention device 100 of this embodiment, the peripheral wall 115 that defines the through hole 111 of the cylindrical body 110 defines the extended suction flow path 151 that connects the through hole 111 and the suction flow path 33. In this way, by configuring the peripheral wall 115 of the cylindrical body 110 to define the extended suction flow path 151, the number of parts can be reduced and the structure can be simplified compared to the liquid splash prevention device 1 of the first embodiment (see FIG. 1, etc.) in which the extension tube 50 defines the extended suction flow path 51.

[0076] The extended suction flow path 151 of this embodiment includes a base end opening 152 that communicates with the reserve space 55, and a tip end opening 153 that communicates with the through hole 111 and is located on the tip side A2 in the axial direction A relative to the base end opening 152. The extended suction flow path 151 extends from the base end opening 152 to the tip end opening 153, thereby connecting the through hole 111 and the suction flow path 33. However, the configuration in which the extended suction flow path 151 connects the through hole 111 and the suction flow path 33 is not limited to the above. For example, the extended suction flow path 151 and the suction flow path 33 may be directly connected without the intermediary of the reserve space 55. Furthermore, in this embodiment, only one extended suction flow path 151 is defined by the peripheral wall 115 that defines the through hole 111 of the cylindrical body 110, but multiple suction flow paths 33 may be defined by the peripheral wall 115. Furthermore, the liquid splash prevention device 100 of this embodiment does not have the extension tube 50 that the liquid splash prevention device 1 of the first embodiment has, but the liquid splash prevention device may further have an extension tube 50 in addition to defining an extended suction flow path 151 in the peripheral wall 115 that defines the through hole 111 of the cylindrical body 110.

[0077] The liquid splash prevention device according to the present disclosure is not limited to the specific configurations shown in the above-described embodiments, and various modifications, changes, and combinations are possible without departing from the scope of the claims. [Industrial Applicability]

[0078] The present disclosure relates to a liquid splash prevention device. [Explanation of symbols]

[0079] 1: Liquid splash prevention device 10: Cylinder 11:Through hole 12: Base end opening of through-hole 13: Tip opening of through hole 14: Inner surface of the cylinder 15: Containment space 16: Closure member 17: Fixed body 18:Protrusion 20: Fixed through hole 21: Support part 22: Support hole 23: Inner surface of support 24: Middle part 25: Intermediate hole 26: Inner surface of middle section 27: Bottom 28a:Bottom hole 28b: Mounting hole 29:Inner surface of the bottom 30: Valve body 31: Torso 32a: Side of the body 32b: Upper surface of the valve body 33: Suction channel 34: Proximal opening of suction channel 35: Tip opening of suction channel 36: Open / close flow path 40: Handle 41: Insertion hole 42: Suction hole 50: Extension tube 51:Extended suction channel 52: Proximal opening of extension suction channel 53: Tip opening of extended suction channel 55: Reserve space 60: Locking mechanism 61: Locking protrusion 62: Locking recess 100: Liquid scattering prevention device 110: Cylinder 111: Through hole 115: Peripheral wall 151:Extended suction channel 152: Proximal opening 153: Tip opening O: Central axis A: Axial direction A1: Base end side in the axial direction A2: Tip side of the axial direction B: Radial direction BL:Blood BS: Biological surface X: Needle member Y, Z: Syringe

Claims

1. a cylindrical body that defines a through hole that penetrates in the axial direction and through which a needle member can be inserted; a blocking member that blocks a proximal end opening of the through hole, the cylindrical body can define a storage space capable of storing a liquid between the closure member and the biological surface in the axial direction by closing a distal end opening of the through hole on the biological surface, the closure member includes a valve body that can be pierced by the needle member in the axial direction, The valve body defines a suction flow path that is connected to the through hole and that can suck liquid through the through hole, and is elastically deformable so as to close the suction flow path.

2. the suction passage includes an opening / closing passage extending along the axial direction, 2. The liquid splash prevention device according to claim 1, wherein the valve body is elastically deformable so as to close the opening / closing flow path by being compressed in either or both of the axial direction and the radial direction of the cylindrical body.

3. the valve element is elastically deformable by being compressed in the axial direction so as to close the opening / closing flow path, the blocking member includes a fixed body fixed to the cylindrical body, The liquid splash prevention device according to claim 2 , wherein the fixed body has a protruding portion that protrudes radially outward from the cylindrical body.

4. The fixed body defines a fixed through-hole that penetrates in the axial direction, the fixed body includes a support portion that defines a support hole that penetrates the fixed body in the axial direction and constitutes at least a part of the fixed through hole, the valve body includes a truncated cone-shaped body portion whose diameter decreases toward a tip end side in the axial direction, whose maximum diameter is greater than a maximum width of the support hole, and whose minimum diameter is smaller than a minimum width of the support hole, the valve body is fitted into the support hole such that a side surface of the body portion abuts against an inner surface of the support portion that defines the support hole, 4. The liquid splash prevention device according to claim 3, wherein the valve body is pressed toward the axial tip end of the support portion and compressed in the axial direction, and is pressed radially inward by the inner surface of the support portion and compressed in the radial direction, thereby elastically deforming to block the opening and closing flow path.

5. a handle that is disposed at a distance from the fixed body toward a base end in the axial direction and that can abut against the fixed body by pressing and compressing the valve body toward a tip end in the axial direction; 5. The liquid splash prevention device according to claim 3, further comprising a locking mechanism that keeps the fixed body and the handle in contact with each other and keeps the valve body in an elastically deformed state so as to close the opening / closing flow path.

6. The liquid splash prevention device according to claim 1 , wherein the blocking member connects the through hole and the suction channel to define a reservoir space capable of storing liquid.

7. 5. The liquid splash prevention device according to claim 1, further comprising an extension tube extending inside the through hole along the axial direction and defining an extended suction flow path connecting the through hole and the suction flow path.

8. 5. The liquid splash prevention device according to claim 1, wherein a peripheral wall defining the through hole of the cylindrical body defines an extended suction flow path therein that connects the through hole and the suction flow path.

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