JP5599244B2 - Sampling port - Google Patents

Description

  The present invention relates to a sampling port that holds a blood collection tube.

  When blood is collected using a blood collection tube having a rubber stopper, a sampling port for holding the blood collection tube is used (see Patent Document 1). The sampling port has a main body portion in which an opening for inserting a blood collection tube is formed, and a needle assembly having a hollow needle that can be inserted into a rubber stopper of the blood collection tube is attached to the main body portion. Yes. The hollow needle is covered with an elastic rubber cap in order to prevent blood leakage.

  As the blood collection tube is inserted into the main body of the sampling port and the hollow needle is inserted through the rubber stopper, the rubber cap is elastically shrunk to expose the hollow needle while generating wrinkles. The exposed hollow needle is collected into a blood collection tube. When the blood collection tube is pulled out after blood collection, the rubber cap is elastically extended so as to stretch the heel from the contracted state and restored to a state where it is put on the hollow needle again. This prevents blood leakage from the hollow needle. The rubber cap is held by the needle assembly by, for example, bringing the root portion into close contact with the needle assembly.

JP 2002-291724 A

  However, wrinkles generated by elastically shrinking the rubber cap as the hollow needle is inserted into the rubber stopper of the blood collection tube may reach the root of the rubber cap. In such a case, the base portion of the rubber cap swells, and the holding force for holding the rubber cap on the needle assembly is weakened. For this reason, when the tip of the rubber cap bites into the minute insertion hole of the rubber stopper of the blood collection tube, the rubber cap is pulled together when the blood collection tube is pulled out, and the position of the rubber cap, etc. There is a risk that the prevention of blood leakage will be insufficient.

  The present invention has been made to solve the problems associated with the above-described prior art, even if the rubber cap is elastically shrunk with the insertion of the hollow needle into the rubber stopper of the blood collection tube, It is an object of the present invention to provide a sampling port that can maintain a holding force for holding a rubber cap on a needle assembly and can sufficiently prevent blood leakage.

In order to achieve the above object, the sampling port of the present invention comprises a main body portion having an opening for inserting a blood collection tube provided with a rubber stopper,
A hollow needle that can be inserted into the rubber stopper of the blood collection tube, a hub that supports a proximal end portion of the hollow needle, an elastic rubber cap that covers the hollow needle, and a holding portion that holds the rubber cap A needle assembly attached to the main body, and
There is a through hole through which the hollow needle covered with the rubber cap penetrates, and wrinkles generated by elastically shrinking the rubber cap with the insertion of the hollow needle into the rubber stopper reach the holding portion. A suppression member that suppresses this ,
The main body is rotatably attached to the needle assembly,
The suppressing member is fixed to the main body portion, and has a clearance that allows the main body portion to rotate between the through hole and the rubber cap .

The restraining member suppresses the wrinkles generated by elastically shrinking the rubber cap with the insertion of the hollow needle into the rubber stopper of the blood collection tube, and reaching the holding portion. Does not swell, and the holding force for holding the rubber cap on the needle assembly does not become weak. For this reason, even if the rubber cap is pulled together when the blood collection tube is pulled out after blood collection, the position of the rubber cap does not shift and blood leakage can be sufficiently prevented. In this way, even when the rubber cap is elastically contracted with the insertion of the hollow needle into the rubber stopper of the blood collection tube and wrinkles occur, the holding force for holding the rubber cap on the needle assembly can be maintained, Therefore, it is possible to provide a sampling port that can sufficiently prevent blood leakage. Furthermore, the main body is pivotably attached to the needle assembly, the restraining member is fixed to the main body, and has a clearance that allows the main body to rotate between the through hole and the rubber cap. Thus, it is possible to easily finely adjust the rotation position of the main body with respect to the needle assembly.

It is a block diagram which shows the blood bag system in which the sampling port was integrated. It is a perspective view which shows the initial blood bag shown by FIG. 1, and a sampling port. It is sectional drawing which shows the principal part of the sampling port before inserting a blood collection tube. It is sectional drawing which shows the principal part of the sampling port after inserting a blood-collecting tube. 5A is a perspective view showing a plate as a restraining member, FIG. 5B is a cross-sectional view taken along line 5B-5B in FIG. 5A, and FIG. 5C is FIG. It is sectional drawing which expands and shows 5C part of). 6A and 6B are cross-sectional views showing a state in which a plate as a restraining member is fixed to the main body. FIG. 7A is a conceptual diagram used for explaining the operation of the present embodiment, and FIG. 7B is a conceptual diagram used for explaining the operation in a case where a plate is not provided. 8A to 8D are cross-sectional views showing modified examples of the plate. FIGS. 9A and 9B are plan views showing further modifications of the plate.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. In addition, the dimensional ratios in the drawings are exaggerated for convenience of explanation, and may be different from the actual ratios.

  Referring to FIG. 1, the illustrated blood bag system 10 is a blood collection device that removes an initial flow (initial blood) of collected blood and uses the initial blood as test blood when blood is collected. is there. Bacteria present on the skin and subcutaneously invade along with the fragments of the skin at the time of puncture, thus removing the primary blood.

  The blood bag system 10 includes a blood collection needle 11, a blood bag 12 that stores blood collected through the blood collection needle 11, a blood collection tube 13 that communicates the blood collection needle 11 and the blood bag 12, and a middle of the blood collection tube 13. A first blood collection bag 16 communicating with the blood collection tube 13 via a branch tube 15 connected to the branch connector 14, and a sampling port 20 connected to the end of the first blood collection bag 16. doing. The branch connector 14 is provided with a sealing member 17 that seals communication with the blood bag 12. The sealing member 17 seals the communication with the blood bag 12 until the collection of the initial blood to the initial blood bag 16 is completed. The branch tube 15 is provided with a clamp member 18 that blocks blood flow to the initial blood bag 16. When the collection of the initial blood is finished, the branch tube 15 is clamped by the clamp member 18, and the blood flow to the initial blood bag 16 is blocked. Thereafter, the sealing member 17 is opened, and blood collection into the blood bag 12 is started.

  FIG. 2 shows a state when the initial blood stored in the initial blood bag 16 is collected as test blood. A sampling port 20 is connected to a blood extraction tube 19 connected to the initial blood bag 16. A lid member 40 that opens and closes the opening 31 is rotatably connected to the sampling port 20 via a hinge 41. When collecting the initial blood stored in the initial blood bag 16 as test blood, a reduced-pressure blood collection tube 50 (corresponding to a blood collection tube) having a rubber stopper 51 is inserted into the sampling port 20 from the opening 31.

  The reduced-pressure blood collection tube 50 is an instrument for collecting the primary blood stored in the primary blood bag 16. The reduced-pressure blood collection tube 50 has a blood collection tube main body 52 and a rubber plug 51 fitted in the opening of the blood collection tube main body 52. The inside of the reduced pressure blood collection tube 50 is in a vacuum or a reduced pressure state. When the vacuum blood collection tube 50 is connected to the sampling port 20, the rubber stopper 51 is pierced by the hollow needle 61. As a result, the inside of the reduced pressure blood collection tube 50 and the blood extraction tube 19 communicate with each other, and the initial blood flow from the blood extraction tube 19 is collected in the reduced pressure blood collection tube 50.

  Referring to FIGS. 3 and 4, the sampling port 20 according to the embodiment will be briefly described. The main body 30 in which an opening 31 for inserting a blood collection tube 50 including a rubber stopper 51 is formed, and a blood collection tube The hollow needle 61 that can be inserted into the 50 rubber stoppers 51, the hub 64 that supports the base end of the hollow needle 61, the elastic rubber cap 70 that covers the hollow needle 61, and the holding that holds the rubber cap 70 And a needle assembly 60 attached to the main body 30. Sampling port 20 further suppresses suppression of heel 71 (see FIG. 4) generated by elastically contracting rubber cap 70 with insertion of hollow needle 61 into rubber plug 51 reaching holding portion 80. A member 90 is provided. The suppression member 90 includes a through hole 91 through which the hollow needle 61 covered with the rubber cap 70 passes. 3 and 4, the upper side in the drawing is an “upper side” in each member, and the lower side in the drawing is a “lower side” in each member. This will be described in detail below.

  The main body 30 has a cylindrical shape, and the lower side has a tapered shape. The main body 30 is provided with an insertion port 32 for inserting the needle assembly 60 and a locking portion 33 for preventing the inserted needle assembly 60 from coming off.

  The main body 30 is rotatably attached to the needle assembly 60. By making it rotatable, the main body 30 can be rotated with respect to the needle assembly 60, and the position of the lid member 40 with respect to the initial blood bag 16 can be easily finely adjusted.

  The needle assembly 60 has a hollow needle 61 having a sharp needle tip at the tip, a connection portion 62 connected to the blood extraction tube 19, and a boss portion 63 that holds the proximal end portion of the hollow needle 61. ing. The hub 64 is provided so as to protrude outward in the radial direction of the boss portion 63. When the needle assembly 60 is inserted into the insertion port 32 of the main body 30, the hub 64 gets over the locking portion 33 and is attached to the main body 30. The upper end of the hub 64 in the figure is formed in an inclined surface so that it can easily get over the locking portion 33 when inserted.

  In order to rotatably attach the main body 30 to the needle assembly 60, the clearance between the connecting portion 62 of the needle assembly 60 and the insertion port 32 of the main body 30 and the outer periphery of the hub 64 and the main body The clearance dimension between 30 and 30 is adjusted.

  The rubber cap 70 is elastically shrunk as the hollow blood tube 61 is inserted into the rubber plug 51 by inserting the blood collection tube 50 into the main body 30, and the hollow needle 61 is exposed while producing a fold 71. When the blood collection tube 50 is pulled out, the rubber cap 70 is elastically extended so as to extend the collar 71 from the contracted state, and is restored to a state where it is put on the hollow needle 61 again. Thereby, leakage of blood from the hollow needle 61 is prevented.

  The holding portion 80 includes a lock member 81 that is inserted into the hollow needle 61 and attached to the boss portion 63 of the needle assembly 60. The lock member 81 has an undercut shape in which the proximal end side of the hollow needle 61 has a smaller diameter than the distal end side. The rubber cap 70 is held by the undercut shape of the lock member 81.

  Referring to FIGS. 5A and 5B, the suppressing member 90 includes a disc-shaped flat plate portion 93 that fits into the main body portion 30, and a convex portion 94 that protrudes toward the upper side at the central portion of the flat plate portion 93. And a plate 92 having A through hole 91 through which the hollow needle 61 to which the rubber cap 70 is attached passes is formed in the convex portion 94. As shown in FIG. 5C, a ring-shaped protrusion 95 that protrudes radially outward is provided integrally with the flat plate portion 93 on the outer peripheral edge of the flat plate portion 93.

  Referring again to FIGS. 3 and 4, the plate 92 is attached in the main body 30 at a position above the lock member 81 that forms the holding portion 80. As the blood collection tube 50 is inserted into the main body 30 and the hollow needle 61 is inserted through the rubber stopper 51, the rubber cap 70 is elastically shrunk and the hollow needle 61 is exposed while generating a collar 71. . The clearance S between the through hole 91 of the plate 92 and the rubber cap 70 is relatively small. Therefore, the plate 92 prevents the flange 71 generated by elastically contracting the rubber cap 70 from reaching the holding portion 80 (FIG. 4).

  As described above, the main body 30 is rotatably attached to the needle assembly 60. A clearance S that allows rotation of the main body 30 is set between the through hole 91 of the plate 92 fixed to the main body 30 and the rubber cap 70. By setting the clearance S to a size that does not hinder the rotation of the main body 30, the rotation position of the main body 30 with respect to the needle assembly 60, the position of the lid member 40 with respect to the initial blood bag 16, etc. can be easily finely adjusted. It becomes possible.

  By providing the convex portion 94 on the plate 92, the range that is not affected by the flange 71 in the longitudinal direction of the rubber cap 70 can be increased. As a result, a decrease in holding force for holding the rubber cap 70 on the needle assembly 60 can be further suppressed. Even if the arrangement position of the plate 92 is shifted from the position shown in FIG. 4 to the upper side, the range that is not affected by the flange 71 in the longitudinal direction of the rubber cap 70 can be increased. However, in this case, since the position of the blood collection tube 50 is also shifted to the upper side, it may be necessary to slightly increase the length of the main body 30 in the longitudinal direction. Accordingly, by providing the plate 92 with the convex portion 94 that protrudes toward the opening 31 of the main body 30, the length of the main body 30 in the longitudinal direction of the rubber cap 70 is maintained while maintaining the length in the longitudinal direction. It is possible to increase a range not affected by the flange 71 and secure a sufficient holding force for holding the rubber cap 70 on the needle assembly 60.

  The constituent materials of the main body 30, the lid member 40, the needle assembly 60 excluding the hollow needle 61, the holding unit 80, and the plate 92 are not particularly limited. For example, polycarbonate, polyethylene, polypropylene, and ethylene-vinyl acetate are used. Examples thereof include polyolefins such as polymers and modified polyolefins.

  The constituent material of the hollow needle 61 is not particularly limited. For example, various metal materials such as stainless steel, aluminum or aluminum alloy, titanium or titanium alloy, superelastic alloy such as Ni-Ti alloy, and various hard materials such as polyphenylene sulfide. Resin material etc. are mentioned.

  Further, the constituent material of the rubber cap 70 is not particularly limited. For example, natural rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber, nitrile rubber, chloroprene rubber, butyl rubber, acrylic rubber, ethylene-propylene rubber, hydrin rubber, Various rubber materials such as urethane rubber, silicone rubber, and fluorine rubber can be used.

  6A and 6B show how the plate 92 is fixed to the main body 30. FIG. In the present embodiment, the main body 30 is formed of a resin material that contracts more than the resin material that forms the plate 92 when heat is applied. This is because the plate 92 can be fixed to the main body 30 by applying heat for sterilization.

  More specifically, as shown in FIG. 6A, before the heat is applied, the inner diameter of the main body 30 is relatively large, and the ring-shaped protrusion 95 of the plate 92 bites into the main body 30 by some size. Since the plate 92 can be inserted into the main body 30 relatively easily, the work of assembling the plate 92 is easy to perform.

  Then, as shown in FIG. 6B, when heat is applied in, for example, a high-pressure steam sterilization method (autoclave) performed for sterilization, the main body 30 contracts more greatly than the plate 92. As a result, the ring-shaped protrusion 95 of the plate 92 further bites into the main body 30, and the plate 92 can be easily fixed to the main body 30.

  As an example of the combination of the resin materials as described above, for example, polypropylene can be applied as the molding material of the main body 30, and polycarbonate can be applied as the molding material of the plate 92.

  The operation of this embodiment will be described.

  When collecting blood, the blood collection tube 50 is inserted into the main body 30 of the sampling port 20 and the hollow needle 61 is inserted through the rubber plug 51. As the hollow needle 61 is inserted through the rubber stopper 51, the rubber cap 70 is elastically shrunk so as to generate the ridge 71, thereby exposing the hollow needle 61.

  With reference to FIG. 7 (B), in the case where the plate 92 is not provided, the rubber cap 170 is elastically contracted as the hollow needle 161 is inserted into the rubber stopper 51 of the blood collection tube 50. The ridge 171 generated by the above may reach the base of the rubber cap 170. In such a case, the base portion of the rubber cap 170 swells, and the holding force for holding the rubber cap 170 on the needle assembly 160 is weakened. For this reason, when the blood collection tube 50 is pulled out, the rubber cap 170 is pulled together, the position of the rubber cap 170 is shifted, and there is a possibility that the prevention of blood leakage becomes insufficient.

  On the other hand, referring to FIG. 4 and FIG. 7A, in the present embodiment, the plate 92 is placed in the main body 30 at a position above the lock member 81 forming the holding portion 80. It is attached to. With this plate 92, it is possible to suppress the heel 71 generated by elastically contracting the rubber cap 70 with the insertion of the hollow needle 61 into the rubber stopper 51 of the blood collection tube 50, reaching the lock member 81. Since the rubber cap 70 does not swell at the lock member 81, the holding force for holding the rubber cap 70 on the needle assembly 60 does not become weak.

  The exposed hollow needle 61 is inserted into the rubber stopper 51 and blood is collected into the blood collection tube 50. When the blood collection tube 50 is pulled out after blood collection, the rubber cap 70 is elastically extended so as to extend the collar 71 from the contracted state, and is restored to a state where it is put on the hollow needle 61 again. Thereby, leakage of blood from the hollow needle 61 is prevented. The rubber cap 70 is held by the needle assembly 60 at the portion of the lock member 81.

  When the blood collection tube 50 is pulled out with the tip of the rubber cap 70 biting into the minute insertion hole of the rubber stopper 51 of the blood collection tube 50, the rubber cap 70 is pulled together. However, since the portion of the lock member 81 is not affected by the flange 71, the holding force remains set at the initial stage. For this reason, the rubber cap 70 is released from the hollow stopper 61 and the biting into the rubber stopper 51 of the blood collection tube 50 is released. As a result, the position of the rubber cap 70 does not shift and blood leakage can be sufficiently prevented.

  As described above, even when the rubber cap 70 is elastically contracted as the hollow needle 61 is inserted into the rubber stopper 51 of the blood collection tube 50 and the ridge 71 is generated, the rubber cap 70 is held in the needle assembly 60. Thus, it is possible to provide the sampling port 20 that can maintain the holding force of the blood vessel and can sufficiently prevent the leakage of blood.

  The main body 30 is rotatably attached to the needle assembly 60, and the plate 92 is fixed to the main body 30. The main body 30 is rotated between the through hole 91 and the rubber cap 70. Since the clearance S is allowed, the rotation position of the main body 30 with respect to the needle assembly 60 can be easily finely adjusted.

  In addition, since the plate 92 includes the convex portion 94 that protrudes toward the opening portion 31 side of the main body portion 30, the longitudinal length of the rubber cap 70 is maintained while maintaining the length of the main body portion 30 in the longitudinal direction. It is possible to secure a sufficient holding force for holding the rubber cap 70 on the needle assembly 60 by increasing the range not affected by the flange 71.

  Further, since the ring-shaped protrusion 95 protruding radially outward is provided on the outer peripheral edge of the plate 92, the plate 92 is inserted into the main body 30 so that the ring-shaped protrusion 95 slightly bites into the main body 30. Therefore, the plate 92 can be easily assembled.

  The main body 30 is formed of a resin material that contracts more than the resin material forming the plate 92 when heat is applied, and the plate 92 is attached to the main body 30 by applying heat for sterilization. For this reason, the plate 92 can be inserted into the main body 30 relatively easily before heat is applied, and the plate 92 can be easily assembled. On the other hand, when heat for sterilization is applied, the main body 30 contracts more than the plate 92. Thereby, the plate 92 can be easily fixed to the main body 30.

(Example of plate modification)
The plate includes a through-hole 91 through which the hollow needle 61 to which the rubber cap 70 is attached passes, and the rubber cap 70 is elastically contracted as the hollow needle 61 is inserted into the rubber stopper 51 of the blood collection tube 50. As long as the generated wrinkles 71 are prevented from reaching the holding portion 80, the shape can be changed to an appropriate shape.

  For example, referring to FIG. 8, a plate 92a (FIG. 8A) in which convex portions 94 are smoothly projected from flat plate portion 93, and plates 92b and 92c (FIG. 8A) in which the entire thickness is increased and the upper surface is flat. 8 (B) (C)), a plate 92d (FIG. 8D) having a cap shape that covers the holding portion 80 without covering the entire bottom surface of the main body 30 can be exemplified.

  Further, referring to FIG. 9, plate 92e (FIG. 9A) of a type that does not form a through portion in flat plate portion 93, and plate 92f (FIG. 9B) of a type in which through portion 96 is formed in flat plate portion 93. ).

(Other modifications)
Although the lock member 81 having an undercut shape is illustrated as the holding portion 80 that holds the rubber cap 70, the holding portion 80 is not limited to this case. The holding portion 80 can be appropriately modified as long as it has a function of preventing and holding the rubber cap 70 provided in the needle assembly 60. For example, the holding unit 80 uses a form in which the rubber cap 70 is adhered and held to the hollow needle 61 by an adhesive, a form in which the rubber cap 70 is fused to the hollow needle 61 by ultrasonic fusion, a clip, or the like. A configuration in which the rubber cap 70 is held on the hollow needle 61 by fitting is illustrated. These holding | maintenance parts 80 may be used independently, and the holding | maintenance part 80 which combined 2 or more types may be sufficient.

20 sampling ports,
30 body part,
31 opening,
50 Depressurized blood collection tube (blood collection tube),
51 Rubber stopper,
60 needle assembly,
61 hollow needle,
64 hubs,
70 rubber cap,
71 皺
80 holding part,
81 lock member,
90 restraining member,
91 through hole,
92 plate (suppressing member),
93 flat plate,
94 convex part,
95 ring-shaped projections,
S Clearance.

Claims (4)

A main body in which an opening for inserting a blood collection tube having a rubber stopper is formed;
A hollow needle that can be inserted into the rubber stopper of the blood collection tube, a hub that supports a proximal end portion of the hollow needle, an elastic rubber cap that covers the hollow needle, and a holding portion that holds the rubber cap A needle assembly attached to the main body, and
There is a through hole through which the hollow needle covered with the rubber cap penetrates, and wrinkles generated by elastically shrinking the rubber cap with the insertion of the hollow needle into the rubber stopper reach the holding portion. A suppression member that suppresses this ,
The main body is rotatably attached to the needle assembly,
The sampling port , wherein the suppression member is fixed to the main body portion and has a clearance that allows the main body portion to rotate between the through hole and the rubber cap . The main body has a cylindrical shape,
The sampling port according to claim 1, wherein the suppressing member has a disk shape and includes a convex portion protruding toward the opening of the main body portion . The sampling port according to claim 1, wherein a ring-shaped protrusion that protrudes radially outward is provided on an outer peripheral edge of the suppressing member . The main body is formed of a resin material that contracts more than a resin material that forms the suppression member when heat is applied, and the main body is configured to apply the heat for sterilization. The sampling port according to any one of claims 1 to 3, wherein the sampling port is fixed to the sampling port.

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