JP6135960B2 - Medical male parts - Google Patents

Description

The present invention relates to a medical male member provided with a tubular member in which a flow path through which a liquid material flows is formed and a cover that covers at least the tip of the tubular member.

  When a patient is transfused or transfused, or when extracorporeal blood circulation is performed during surgery, it is necessary to form a route (transport line) for transporting a liquid substance such as a drug solution or blood. A transportation line is generally formed by connecting containers, various instruments, tubes, and the like. As a method of connecting different members, a slip connection between a male luer as a male member and a needleless port as a female member is known (see, for example, Patent Documents 1 and 2). The needleless port includes a partition member (hereinafter referred to as “septum”) made of an elastic material such as rubber and having a linear slit (cut) formed at the center. By inserting a male luer (tubular body) without a sharp metal needle such as an injection needle into the slit of the septum, the needleless port and the male luer can be communicated with each other. When the male luer is removed from the needleless port, the septum slit closes immediately. As described above, the septum has resealability, and the male luer can be repeatedly inserted and removed.

  In the above-described slip connection, when the male luer is removed from the needleless port, the slit of the septum is immediately closed, so that the possibility of liquid leaking from the needleless port to which the male luer is not connected is generally low. However, since the male luer before being inserted into the needleless port and after being extracted is exposed to the outside, there is a possibility that the liquid material leaks from the male luer.

  As shown in FIG. 7, a method of covering the male luer 110 with an extendable cover 120 is known as shown in FIG. 7 in order to reduce the possibility that the liquid material leaks from the male luer not connected to the needleless port (Patent Document 3). , 4). The cover 120 includes an outer peripheral wall 121 having a substantially cylindrical shape, and one end of the outer peripheral wall 121 is closed with a top plate 123. The male luer 110 has a cylindrical shape, and an opening 112 through which a liquid material flows in and out is formed at the tip. A linear slit (cut) 125 is formed at the position of the top plate 123 facing the opening 112 of the male luer 110. The septum 151 of the needleless port 150 is a disk-shaped member made of an elastic material such as rubber, and a linear slit (cut) 152 is formed at the center thereof. The septum 151 is sandwiched and fixed by a base portion 153 having a substantially cylindrical shape and a port cap 155.

  As shown in FIG. 7, when the male luer 110 is not connected to the needleless port 150, the opening 112 of the male luer 110 is closed by the top plate 123 of the cover 120 being in close contact. The slit 125 of the cover 120 is closed. When the male luer 110 is pushed into the needleless port 150 from this state, the male luer 110 passes through the slit 125 of the cover 120 and further passes through the slit 152 of the septum 151 to connect the male luer 110 and the needleless port 150. it can. At this time, the outer peripheral wall 121 of the cover 120 is compressed and deformed. Thereafter, when the male luer 110 is extracted from the needleless port 150, the outer peripheral wall 121 of the cover 120 is extended by its elastic recovery force, and returns to the initial state.

  By covering the male luer 110 with the cover 120 as described above, the opening 112 of the male luer 110 is closed with the top plate 123 of the cover 120 when the male luer 110 is not connected to the needleless port 150 as shown in FIG. be able to. Therefore, there is a low possibility that the liquid material leaks from the male luer 110.

Japanese Patent No. 3389983 Japanese Patent No. 4163975 International Publication No. 2010/061742 (Figs. 7 and 8) International Publication No. 2010/061743 Pamphlet (FIGS. 10 and 11)

  However, in the configuration of FIG. 7, when the male luer 110 is extracted from the needleless port 150, there is a problem in that a liquid material remains on the outer surface 123 a of the top plate 123 of the cover 120 and the outer surface 151 a of the septum 151.

  For example, when bacteria propagate in the liquid material remaining on the outer surface 123a of the top plate 123 of the cover 120 or the outer surface 151a of the septum 151, the liquid material is transported when the male luer 110 is reconnected to the needleless port 150. Bacteria can be mixed in the pathway.

  Further, when the liquid material includes a drug designated as a powerful drug, such as some anticancer drugs, the liquid material remains on the outer surface 123a of the top plate 123 of the cover 120 and the outer surface 151a of the septum 151. There is a possibility that the liquid material adheres to the operator's finger or the like, or the vapor of the liquid material is sucked by the operator.

An object of the present invention is a medical male member provided with a cover that prevents leakage of a liquid substance when not connected to a female member, and the liquid that adheres to the outer surface of the cover and the female member after being separated from the female member. To reduce the quantity.

The medical male member of the present invention includes a tubular member in which a flow path through which a liquid material flows is formed, and a cover that covers at least the tip of the tubular member. A lateral hole communicating with the flow path is formed on the outer peripheral surface of the tubular member. The cover includes an outer peripheral wall that can be elastically compressed and deformed, and a head provided at one end of the outer peripheral wall. The head is formed with a lumen into which the distal end of the tubular member is inserted. A slit penetrating the head is formed at the deepest portion of the lumen. In a state where the outer peripheral wall is not compressed and deformed, the inner peripheral surface of the lumen of the head closely contacts the outer peripheral surface of the tubular member to close the lateral hole, and the distal end of the tubular member and the inner The deepest part of the cavity is spaced apart, and an airtight gap is formed between the distal end of the tubular member and the deepest part of the lumen . When the head is displaced with respect to the tubular member so that the outer peripheral wall compressively deforms, the tubular member penetrates the slit and the lateral hole is exposed from the head. When the tubular member is pulled out from the slit, the distal end of the tubular member is separated from the deepest portion of the lumen, and in the process of forming the void, a negative pressure corresponding to the volume expansion is formed in the void. Will occur.

  According to the present invention, when the outer peripheral wall of the cover is not compressed and deformed, the inner peripheral surface of the lumen of the head blocks the lateral hole of the tubular member, so that the male member is connected to the female member. It is possible to prevent the liquid material from leaking from the male member when it is not in the state.

  Further, in a state where the outer peripheral wall of the cover is not compressed and deformed, the distal end of the tubular member and the deepest part of the lumen in which the slit is formed are separated from each other. Therefore, in the process of separating the male member from the female member, a negative pressure corresponding to the expansion of the volume can be generated in the gap formed between the distal end of the tubular member and the deepest portion of the lumen. Due to this negative pressure, the liquid material remaining between the cover and the female member is sucked into the gap. As a result, it is possible to reduce the amount of liquid material that adheres to the outer surfaces of the cover and the female member after separating the male member and the female member.

FIG. 1 is a cross-sectional view showing a schematic configuration of a male member according to an embodiment of the present invention. FIG. 2A is a perspective view seen from above the cover constituting the male member according to one embodiment of the present invention, and FIG. 2B is a perspective view seen from below. FIG. 3A is a top view of a cover constituting a male member according to an embodiment of the present invention, FIG. 3B is a side view thereof, and FIG. 3C is a cross-sectional view along the vertical direction. FIG. 4A is a cross-sectional view of a male member and a needleless port according to an embodiment of the present invention before connection. FIG. 4B is a cross-sectional view of the male member and the needleless port according to the embodiment of the present invention during connection. FIG. 4C is a cross-sectional view of the male member and the needleless port according to the embodiment of the present invention when the connection is completed. FIG. 5A is a cross-sectional view of a male member and a needleless port according to an embodiment of the present invention during separation. FIG. 5B is a cross-sectional view of a male member and a needleless port according to an embodiment of the present invention during separation. FIG. 6 is a cross-sectional view taken along the vertical direction of a cover constituting a male member according to another embodiment of the present invention. FIG. 7 is a cross-sectional view showing a conventional male luer with a cover connected to a needleless port. 8A to 8D are cross-sectional views sequentially showing a state in which a conventional male luer with a cover is inserted into a needleless port.

  When the male luer 110 with the conventional cover 120 shown in FIG. 7 is used, the present inventors extract the male luer 110 from the needleless port 150 and then the outer surface 123a of the top plate 123 of the cover 120 and the septum 151. In order to find out the reason why the liquid material remains on the outer surface 151a, the state of deformation of the septum 151 and the cover 120 from connection to separation of the male luer 110 to the needleless port 150 was observed using X-ray CT. This will be described below.

  8A to 8D are cross-sectional views sequentially showing a state in which the conventional male luer 110 with the cover 120 is inserted into the needleless port 150. The slit 152 formed in the septum 151 and the slit 125 formed in the top plate 123 of the cover 120 are formed along a direction perpendicular to the cross sections of these drawings.

  FIG. 8A shows a state immediately before the male luer 110 and the needleless port 150 are connected. The top plate 123 of the cover 120 attached to the male luer 110 is in contact with the port cap 155 of the needleless port 150. From this state, the male luer 110 is pushed into the needleless port 150.

  FIG. 8B shows a state in which the top plate 123 of the cover 120 is slightly deformed toward the septum 151 by the male luer 110. The septum 151 is also slightly deformed by the deformed top plate 123. A small gap 137 is formed between the top plate 123 and the septum 151. The slit 125 of the top plate 123 and the slit 152 of the septum 151 have not been opened yet.

  When the male luer 110 is further pushed into the needleless port 150, as shown in FIG. 8C, the slit 125 of the top plate 123 of the cover 120 is opened. The top plate 123 is stretched by the male luer 110 and enters the opening of the port cap 155. As a result, the septum 151 is also deformed and the gap 137 is enlarged. However, the slit 152 of the septum 151 has not been opened yet.

  FIG. 8D shows a state where the connection between the male luer 110 and the needleless port 150 is completed. The deformation amount of the top plate 123 is further increased, and the male luer 110 passes through the slit 125 of the top plate 123. The distal end of the male luer 110 presses the outer surface 151a of the septum 151. As a result, the septum 151 is greatly bent and extended, and the slit 152 is opened. Thus, the male luer 110 and the needleless port 150 communicate with each other.

  Thereafter, a liquid material is caused to flow between the male luer 110 and the needleless port 150. The outer surface 151a of the septum 151 constitutes a part of the flow path wall through which the liquid material flows.

  Next, the male luer 110 is pulled out from the needleless port 150 from the state of FIG. 8D. Prior to withdrawal, the flow of liquid between the male luer 110 and the needleless port 150 is stopped. Even after the flow of the liquid material stops, the liquid material usually fills the male luer 110 and the needleless port 150. The withdrawal of the male luer 110 from the needleless port 150 proceeds from FIG. 8D to FIG.

  When the male luer 110 is retracted from the needleless port 150 from the state of FIG. 8D, the slit 152 of the septum 151 is closed in the state of FIG. 8C, and then the slit 125 of the top plate 123 is closed in the state of FIG. 8B. Therefore, the liquid substance located in the vicinity of the outer surface 151 a of the septum 151 in FIG. 8D is confined in the gap 137. As a result, when the male luer 110 is then pulled out from the needleless port 150 and the cover 120 and the septum 151 are separated, the liquid material in the gap 137 becomes the outer surface 123a of the top plate 123 of the cover 120 and the septum 151 as described above. It remains on the outer surface 151a.

  Based on the above findings, the present inventors have devised the shape of the cover that covers at least the tubular member (for example, male luer) and its tip, thereby separating the tubular member from the female member (for example, needleless port) and then covering the tubular member (for example, needleless port). And it discovered that the quantity of the liquid substance adhering to the outer surface of a female member can be decreased, and completed this invention.

That is, the medical male member of the present invention includes a tubular member in which a flow path through which a liquid material flows is formed, and a cover that covers at least the tip of the tubular member. A lateral hole communicating with the flow path is formed on the outer peripheral surface of the tubular member. The cover includes an outer peripheral wall that can be elastically compressed and deformed, and a head provided at one end of the outer peripheral wall. The head is formed with a lumen into which the distal end of the tubular member is inserted. A slit penetrating the head is formed at the deepest portion of the lumen. In a state where the outer peripheral wall is not compressed and deformed, the inner peripheral surface of the lumen of the head closely contacts the outer peripheral surface of the tubular member to close the lateral hole, and the distal end of the tubular member and the inner The deepest part of the cavity is spaced apart, and an airtight gap is formed between the distal end of the tubular member and the deepest part of the lumen . When the head is displaced with respect to the tubular member so that the outer peripheral wall compressively deforms, the tubular member penetrates the slit and the lateral hole is exposed from the head. When the tubular member is pulled out from the slit, the distal end of the tubular member is separated from the deepest portion of the lumen, and in the process of forming the void, a negative pressure corresponding to the volume expansion is formed in the void. Will occur.

A protruding top portion having a circular outer shape when viewed from above is formed at the tip of the head, and the slit is formed at the top portion so as to pass through the center of the circle, and the slit is It is preferable to face the tip of the tubular member . Thereby, after isolate | separating a male member and a female member, the amount of liquid substances adhering to the outer surface of a cover and a female member can further be reduced.

  It is preferable that the surface of the top portion facing the female member includes a convex curved surface protruding toward the female member. Thereby, after isolate | separating a male member and a female member, the amount of liquid substances adhering to the outer surface of a cover and a female member can further be reduced.

  It is preferable that the convex curved surface includes a spherical surface, a conical surface, or a truncated cone surface. Thereby, the shape of the outer surface of a top part can be simplified.

  It is preferable that an engagement shape that can engage with the female member is formed on the head. Thereby, after isolate | separating a male member and a female member, the amount of liquid substances adhering to the outer surface of a cover and a female member can further be reduced. Further, in the process of separating the male member from the female member, the outer peripheral wall of the cover can be reliably extended to the initial state. The engagement shape can be formed on the top.

Wherein in a state where the outer peripheral wall is not deformed by compression, gap airtight Ru is formed between the deepest portion of the lumen and the distal end of the tubular member. Thereby, a large negative pressure can be generated in the gap in the process of separating the male member from the female member. Therefore, after separating the male member and the female member, the amount of liquid material adhering to the outer surfaces of the cover and the female member can be further reduced.

  Below, this invention is demonstrated in detail, showing suitable embodiment. However, it goes without saying that the present invention is not limited to the following embodiments. For convenience of explanation, the drawings referred to in the following description show only the main members necessary for explaining the present invention in a simplified manner among the constituent members of the embodiment of the present invention. Therefore, the present invention can include arbitrary components not shown in the following drawings. In addition, the dimensions of the members in the following drawings do not faithfully represent the actual dimensions of the constituent members and the dimensional ratios of the members.

  FIG. 1 is a cross-sectional view showing a schematic configuration of a male member 1 according to an embodiment of the present invention. The male member 1 includes a tubular member 10 and a cover 20 that covers at least the tip 11 of the tubular member 10. For convenience of the following description, the upper side and the lower side of the paper surface of FIG. 1 are referred to as “upper side” and “lower side” of the male member 1. However, this top and bottom do not mean the top and bottom when the male member 1 is actually used.

  The tubular member 10 has a cylindrical shape in which a flow path 13 through which a liquid material flows is formed along the longitudinal direction thereof. The outer peripheral surface of the tubular member 10 is a cylindrical surface whose outer diameter is constant along the longitudinal direction of the tubular member 10, or a tapered surface whose outer diameter decreases from the base 12 toward the tip 11. Is preferred. A lateral hole 14 is formed at a position near the tip 11 of the outer peripheral surface of the tubular member 10. The lateral hole 14 is a through hole that communicates with the flow path 13 and penetrates the outer peripheral wall of the tubular member 10 in a direction substantially orthogonal to the longitudinal direction of the tubular member 10. In the present embodiment, a pair of the lateral holes 14 are formed along the diameter direction of the tubular member 10, but the number of the lateral holes 14 is not limited to this, and may be one or three or more. There may be. The liquid material flows out from the flow path 13 through the lateral hole 14 or flows into the flow path 13. In the conventional male luer 110 shown in FIG. 7, an opening 112 is formed at the tip thereof, but an opening (or a through hole) communicating with the flow path 13 is formed at the tip 11 of the tubular member 10 of the present embodiment. It has not been. On the opposite side of the base 12 from the tubular member 10, a tubular portion 18 having a substantially cylindrical shape communicating with the tubular member 10 is formed. For example, a flexible tube (not shown) is connected to the cylindrical portion 18 in order to transport the liquid material to the tubular member 10. The tubular member 10 is preferably made of a hard material that can be regarded as a substantially rigid body. Specifically, it can be produced by a method such as integral molding together with the base 12 and the cylindrical portion 18 using a resin material such as polyacetal and polycarbonate.

  2A is a perspective view of the cover 20 as viewed from above, FIG. 2B is a perspective view of the cover 20 as viewed from below, FIG. 3A is a top view thereof, FIG. 3B is a side view thereof, and FIG. It is.

  The cover 20 includes an outer peripheral wall 21 having a substantially cylindrical shape, a head portion 23 provided at the upper end of the outer peripheral wall 21, and an annular base portion 28 provided at the lower end of the outer peripheral wall 21. The cover main body 20 can be integrally formed of a flexible material (for example, silicon rubber or isoprene rubber).

  The outer peripheral wall 21 can be elastically compressed and deformed so that its vertical dimension is shortened. In order to realize this, in the present embodiment, the outer peripheral wall 21 has a bellows shape whose outer diameter and inner diameter are changed in a certain cycle in the vertical direction within a certain range. In the present embodiment, the cross-sectional shape along the horizontal direction of the outer peripheral wall 21 is a circle, but it may be an arbitrary shape such as a polygon such as a quadrangle or a hexagon.

  The head portion 23 is formed with a lumen 24 communicating with the internal space of the outer peripheral wall 21. The shape of the inner peripheral surface of the lumen 24 is a cylindrical surface or a conical surface (tapered surface) whose inner diameter decreases as the distance from the outer peripheral wall 21 increases. In the deepest portion 24a of the lumen 24, a slit 25 penetrating the head portion 23 in the vertical direction is formed. As shown in FIG. 3A, the slit 25 is a linear notch whose shape viewed from above is a “−” (minus) shape. In a normal state in which the tubular member 10 does not penetrate the slit 25, it is preferable that the edges facing each other forming the slit 25 are in contact with each other.

A top portion 26 protruding from the upper surface 23 a is formed on the upper surface 23 a of the head portion 23. The tip of the top portion 26 is a convex curved surface 26s that swells smoothly in a dome shape such as a spherical surface. A neck portion 26n is formed between the upper surface 23a of the head 23 and the convex curved surface 26s. A portion adjacent to the neck portion 26n and having the maximum outer diameter of the convex curved surface 26s is referred to as a top end edge 26e. The outer diameter of the neck portion 26n is smaller than the outer diameter of the top end edge 26e. When viewed from above (see FIG. 3A), the outer shape of the top edge 26e is circular, slit 25 through the center of the circular are formed.

  As shown in FIG. 1, the tubular member 10 is inserted into the cover 20 from the base 28 side, and the base 28 of the cover 20 is fixed to the base 12 of the tubular member 10. The method for fixing the base portion 28 to the base 12 is not particularly limited, and any method such as adhesion, fusion, engagement, and fitting can be used. In order to accurately position the tubular member 10 and the cover 20, the base 12 and the base portion 28 may be formed with fitting shapes that fit each other.

  When the cover 20 is attached to the tubular member 10, the distal end 11 of the tubular member 10 is inserted into the lumen 24 of the head portion 23 of the cover 20. In the state shown in FIG. 1 in which the outer peripheral wall 21 of the cover 20 is not compressed and deformed, the portion of the tubular member 10 inserted into the lumen 24 is referred to as a tip region 15. The lateral hole 14 is formed in the tip region 15. The outer diameter of the tip region 15 is the same as or slightly larger than the inner diameter of the lumen 24. Therefore, the inner peripheral surface of the lumen 24 is in close contact with the outer peripheral surface of the tubular member 10, and the lateral hole 14 is closed by the inner peripheral surface of the lumen 24. Further, the distal end 11 of the tubular member 10 and the deepest portion 24a of the inner cavity 24 are separated from each other, and a gap 24s is formed therebetween. The tip 11 of the tubular member 10 and the slit 25 are opposed to each other with the gap 24s therebetween. The slit 25 is preferably sealed. Thus, the gap 24s is preferably hermetically sealed.

  The slip connection and separation between the male member 1 of the present embodiment and the needleless port as the female member will be described below.

  FIG. 4A is a cross-sectional view of the male member 1 and the needleless port 50 before connection. The needleless port 50 includes a septum 51 as with the needleless port 150 shown in FIG. The septum 51 is a disk-shaped partition member made of an elastic material such as rubber and having a linear slit (cut) 52 formed at the center thereof. The septum 51 is sandwiched and fixed between a substantially cylindrical base portion 53 and a port cap 55. The port cap 55 includes a pressing plate 56 on the side facing the male member 1. A circular opening 57 is formed at the center of the pressing plate 56. The slit 52 of the septum 51 is exposed in the opening 57.

  As shown in FIG. 4A, the male member 1 and the needleless port 50 are opposed to each other, and the male member 1 is pressed against the needleless port 50. First, the convex curved surface 26 s of the top portion 26 of the male member 1 comes into contact with the outer surface 51 a of the septum 51, and both are in close contact with each other. The top portion 26 pushed by the tubular member 10 enters the opening 57 of the holding plate 56 while elastically deforming the septum 51. Finally, as shown in FIG. 4B, the top edge 26e of the top portion 26 reaches the holding plate 56. Over the opening edge 57e of the opening 57, the opening edge 57e is fitted into the neck portion 26n, and the top edge 26e and the opening edge 57e are engaged. At substantially the same time, the upper surface 23a of the head portion 23 of the male member 1 comes into contact with the pressing plate 56, and the movement of the head portion 23 toward the needleless port 50 is restricted. Therefore, when the male member 1 is further pushed into the needleless port 50, the tip 11 of the tubular member 10 enters the slit 25 of the head 23 and penetrates it, and further penetrates the slit 52 of the septum 51. In this process, the outer peripheral wall 21 of the cover 20 is elastically compressed and deformed in the vertical direction.

  Thus, as shown in FIG. 4C, the male member 1 and the needleless port 50 can be slip-connected. The top portion 26 is inserted into the opening 57 of the holding plate 56, and the septum 51 is elastically deformed. The convex curved surface 26 s of the top portion 26 is in close contact with the outer surface 51 a of the septum 51. The top edge 26 e of the top 26 is engaged with the opening edge 57 e of the pressing plate 56. The tubular member 10 passes through the slit 25 of the head 23 and the slit 52 of the septum 51 in order. The edge of the slit 52 surrounds and is in close contact with the outer peripheral surface of the tubular member 10. The lateral hole 14 of the tubular member 10 is located on the back side (opposite to the top portion 26) with respect to the septum 51, and the male member 1 and the needleless port 50 communicate with each other through the lateral hole 14. Therefore, in this state, a liquid material can be flowed between the male member 1 and the needleless port 50. Since the outer surface 51a of the septum 51 is in close contact with the convex curved surface 26s of the top portion 26, unlike the conventional configuration shown in FIG. 8D, the outer surface 51a of the septum 51 hardly comes into contact with the liquid material.

  After stopping the liquid flow between the male member 1 and the needleless port 50, the male member 1 is pulled out from the needleless port 50 from the state of FIG.

  As described above, since the top edge 26 e of the top 26 is engaged with the opening edge 57 e of the pressing plate 56, the head 23 cannot be displaced with respect to the needleless port 50. Accordingly, the tubular member 10 moves relative to the septum 51 and the head 23. In this process, the edge of the slit 52 slides on the outer peripheral surface of the tubular member 10, and the liquid material attached to the outer peripheral surface of the tubular member 10 is peeled off. Further, the outer peripheral wall 21 of the cover 20 extends.

  FIG. 5A is a cross-sectional view showing a state immediately after the tubular member 10 is pulled out from the slit 52 of the septum 51. The slit 52 of the septum 51 is elastically recovered and closed as soon as the tubular member 10 is pulled out. Since the tip 11 of the tubular member 10 remains in the slit 25 of the cover 20, the slit 25 is slightly opened. The lateral hole 14 of the tubular member 10 has moved into the lumen 24 of the head 23. The inner peripheral surface of the lumen 24 is in close contact with the outer peripheral surface of the tubular member 10, and the lateral hole 14 is closed by the inner peripheral surface of the lumen 24.

  FIG. 5B is a cross-sectional view showing a state immediately after the tubular member 10 is pulled out from the slit 25 of the cover 20. Similar to the slit 52 of the septum 51, the slit 25 of the cover 20 is elastically recovered and closed as soon as the tubular member 10 is pulled out. Almost parallel to the closing of the slit 25, the distal end 11 of the tubular member 10 is separated from the deepest portion 24a of the lumen 24, and a gap 24s is formed. As described above, in the state of FIG. 5A, the slit 52 of the septum 51 is already closed, and the inner peripheral surface of the lumen 24 is in close contact with the outer peripheral surface of the tubular member 10. Accordingly, a negative pressure is generated in the gap 24s formed in the process of shifting from FIG. 5A to FIG. 5B according to the volume expansion. Due to this negative pressure, the liquid material remaining between the outer surface 51 a of the septum 51 and the convex curved surface 26 s of the top portion 26 is sucked into the gap 24 s through the slit 25.

  Thereafter, when the male member 1 is further pulled out from the needleless port 50, the engagement between the top end edge 26e of the top portion 26 and the opening end edge 57e of the pressing plate 56 is finally released, and then the convex curved surface 26s of the top portion 26 and the septum 51 are released. The outer surface 51a is separated, and the initial state shown in FIG. 4A is restored.

  As can be understood from the above description, according to the present embodiment, a negative pressure can be generated in the gap 24 s formed in the process of separating the male member 1 from the needleless port 50. The remaining liquid material can be sucked into the gap 24 s through the slit 25. As a result, after separating the male member 1 and the needleless port 50, the amount of liquid material adhering to the outer surface of the cover 20 of the male member 1 (ie, the convex curved surface 26 s) and the outer surface 51 a of the septum 51 of the needleless port 50 is reduced. It can be reduced.

  Furthermore, since the convex curved surface 26 s is formed at the top 26 at the tip of the head 23, the convex curved surface 26 s can be brought into close contact with the outer surface 51 a of the septum 51 when the male member 1 and the needleless port 50 are connected. it can. Therefore, after separating the male member 1 and the needleless port 50, the amount of liquid material adhering to the convex curved surface 26s and the outer surface 51a can be further reduced.

  Further, in a non-connected state where the male member 1 is not connected to the needleless port 50 (see FIG. 4A), the lateral hole 14 of the tubular member 10 is blocked by the inner peripheral surface of the lumen 24 of the cover 20. And since the slit 25 of the cover 20 is closed, a liquid substance does not leak from the male member 1 in a non-connected state.

  When the male member 1 and the needleless port 50 are connected, as described with reference to FIG. 4C, the top edge 26 e of the top 26 and the opening edge 57 e of the pressing plate 56 are engaged. Thereby, after connecting the male member 1 and the needleless port 50, when separating both, before the tubular member 10 is extracted from the slit 25 of the cover 20, the cover 20 and the needleless port 50 are connected. Separation can be prevented. Therefore, after separating the male member 1 and the needleless port 50, the amount of liquid material adhering to the convex curved surface 26s and the outer surface 51a can be further reduced. Further, when the male member 1 and the needleless port 50 are separated, the outer peripheral wall 21 of the cover 20 can be reliably extended to the initial state.

  The above-described embodiment is an exemplification, and the present invention is not limited to the above-described embodiment, and can be changed as appropriate.

  In the above embodiment, the substantially spherical convex curved surface 26 s is formed on the surface of the top portion 26 that protrudes from the upper surface 23 a of the head portion 23 on the side facing the female member (needleless port 50). The shape of the outer surface is not limited to this. In FIG. 6, sectional drawing of another cover 20 which comprises the male member of this invention is shown. On the surface of the top portion 26 of the cover 20 facing the female member, a spherical surface 26s1, a first truncated cone surface 26s2, and a second truncated cone surface 26s3 are arranged in this order from the center toward the top edge 26e. The slit 25 is formed in the spherical surface 26s1. The taper angle of the second truncated cone surface 26s3 is larger than the taper angle of the first truncated cone surface 26s2. The taper angles of the first truncated cone surface 26s2 and the second truncated cone surface 26s3 can be arbitrarily set.

  In FIG. 6, a plane may be formed instead of the spherical surface 26s1. Instead of the spherical surface 26s1 and the first truncated cone surface 26s2, one conical surface may be formed. In this case, a slit 25 is formed at the center of the conical surface. Instead of the second truncated cone surface 26s3, an annular plane may be formed outside the first truncated cone surface 26s2. Alternatively, the second truncated cone surface 26s3 may be omitted. Alternatively, another one or more conical surfaces may be added.

  In the above description, “spherical surface”, “conical frustum surface”, and “conical surface” are “spherical surface”, “conical frustum surface” obtained by deforming the exact “spherical surface”, “conical surface”, and “conical surface”, respectively , Each may include a “substantially conical surface”.

  The surface shape of the top part 26 can be arbitrarily set in addition to the above. Generally, the surface of the top portion 26 that faces the female member is a convex curved surface that protrudes toward the female member, and is in close contact with the outer surface of the female member (the outer surface 51a of the septum 51 in the above embodiment). This is preferable because of improved properties.

  In the above embodiment, the top portion 26 is formed at the tip of the head portion 23, but this top portion 26 can be omitted. If the top portion 26 is omitted, when the male member and the female member are connected, the cover and the outer surface of the female member (the outer surface 51a of the septum 51 in the above embodiment) may not be in close contact. However, since the negative pressure can be generated in the gap 24s in the process of separating the male member and the female member, the amount of liquid material adhering to the outer surface of the cover and the female member after separating the male member and the female member is reduced. Can be reduced.

  In the above embodiment, the top end edge 26e adjacent to the neck portion 26n is formed on the cover 20 as an engagement structure that engages with the female member. However, the engagement structure can be omitted. Even in this case, it is possible to realize a cover that acts in the same manner as in the above embodiment by appropriately setting the elastic force of the outer peripheral wall 21 of the cover 20.

  The male member of the present invention may include an engaging member that engages with the female member in order to stably maintain the connection state with the female member. As such an engaging member, for example, a lock lever described in Patent Document 2 can be used.

  Although the male member 1 of said embodiment was a male lure which can be connected to the needleless port provided with the septum, the male member of this invention may be connectable to other female members. The configuration of the male member of the present invention can be appropriately changed according to the configuration of the female member to be connected. For example, the male member of the present invention may be a bottle needle that can puncture a rubber stopper of a vial bottle. In this case, it is preferable to make known changes such as sharply forming the tip of the tubular member 10 and providing two independent flow paths for liquid and gas in the tubular member 10.

  Although there is no restriction | limiting in particular in the utilization field of this invention, It can utilize preferably for the male member used with the transport line for performing infusion, blood transfusion, extracorporeal blood circulation, etc. Moreover, it can also utilize for the male member of the various connectors used when preparing the chemical | medical solution etc. which are administered to a patient. In particular, it can be preferably used in the field of handling dangerous drugs (for example, anticancer drugs) that need to be prevented from leaking or evaporating. Furthermore, it can also be used for male members used in various fields for handling liquid substances such as foods other than medical products.

DESCRIPTION OF SYMBOLS 1 Male member 10 Tubular member 11 Tubular member tip 13 Tubular member flow path 14 Tubular member lateral hole 20 Cover 21 Outer peripheral wall 23 Head 24 Head lumen 24a Inner lumen deepest 24s Cavity 25 Slit 26 Top 26e Top edge (engaged shape)
26s Convex curved surface (spherical surface)
26s1 Spherical surface 26s2 First truncated cone surface 26s3 Second truncated cone surface 50 Needleless port (female member)
51 Septum 51a Septum outer surface 52 Septum slit

Claims (5)

A medical male member comprising a tubular member in which a flow path through which a liquid material flows is formed, and a cover that covers at least the tip of the tubular member,
A lateral hole communicating with the flow path is formed on the outer peripheral surface of the tubular member,
The cover includes an outer peripheral wall that can be elastically compressed and deformed, and a head provided at one end of the outer peripheral wall.
In the head, a lumen into which the tip of the tubular member is inserted is formed,
In the deepest part of the lumen, a slit that penetrates the head is formed,
In a state where the outer peripheral wall is not compressed and deformed, the inner peripheral surface of the lumen of the head closely contacts the outer peripheral surface of the tubular member to close the lateral hole, and the distal end of the tubular member and the inner The deepest part of the cavity is spaced apart, and an airtight gap is formed between the distal end of the tubular member and the deepest part of the lumen;
When the head is displaced with respect to the tubular member such that the outer peripheral wall compressively deforms, the tubular member penetrates the slit, and the lateral hole is exposed from the head ,
When the tubular member is pulled out from the slit, the distal end of the tubular member is separated from the deepest portion of the lumen, and in the process of forming the void, a negative pressure corresponding to the volume expansion is formed in the void. medical male member characterized by but occur. A protruding top portion having a circular outer shape when viewed from above is formed at the tip of the head, and the slit is formed at the top portion so as to pass through the center of the circle, and the slit is The medical male member according to claim 1, which is opposed to the distal end of the tubular member. The medical male member according to claim 2, wherein a surface of the top facing the female member includes a convex curved surface protruding toward the female member. The medical male member according to claim 3, wherein the convex curved surface includes a spherical surface, a conical surface, or a truncated cone surface. The medical male member according to any one of claims 1 to 4, wherein an engagement shape capable of engaging with a female member is formed on the head.

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