Blood collection tube holder

Abstract

To address such problems that when there are a plurality of types of blood collection tubes with different tip shapes including sealing bodies, it is necessary to prepare a separate blood collection tube holder for every blood collection tube, which is cumbersome, and furthermore, providing the plurality of types of blood collection tube holders increases costs and complicates parts management.SOLUTION: A blood collection tube holder 10A includes an expansion / contraction structure 16A allowing a needle holding part 14 to move axially relative to a holder body 12A in which a tip portion of a blood collection tube T is stored. The needle holding part 14 is so formed that a needle body 28 can be attached thereto. The expansion / contraction structure 16A has a groove-shaped recess 34A provided along the holder body 12A, and a protrusion 36 provided on an inner peripheral surface 30 of the needle holding part 14 and being engaged with the recess 34A. As the needle holding part 14 moves axially relative to the holder body 12A, the axial distance L between a tip wall 20 of the holder body 12A and the tip of the needle holding part 14 changes.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a blood collection tube holder capable of holding a blood collection tube. [Background technology]

[0002] Patent Document 1 discloses a cylindrical holder body, a blood collection needle protruding from the tip of the holder body, and a core movably provided inside the holder body. The base end of the blood collection needle protrudes into the inner cavity of the holder body. When the blood collection needle is inserted into the skin of a living subject and a blood collection tube is pushed into the holder body, the core moves toward the tip and the base end of the blood collection needle punctures the tip of the blood collection tube, and blood is introduced into the blood collection tube through the blood collection needle. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 10-262955 Summary of the Invention [Problem to be solved by the invention]

[0004] Generally, the open tip of a blood collection tube is provided with a seal for sealing the inside of the blood collection tube. Therefore, when there are multiple types of blood collection tubes with different tip shapes including the seal, it is necessary to prepare a separate blood collection tube holder for each blood collection tube, which is cumbersome. Furthermore, providing multiple types of blood collection tube holders increases costs and complicates parts management.

[0005] The present invention aims to solve the above-mentioned problems. [Means for solving the problem]

[0006] (1) An aspect of the present invention is a blood collection tube holder for holding a cylindrical blood collection tube whose open tip is sealed with a sealant, the blood collection tube holder comprising: a cylindrical holder body having an inner cavity and a tip wall with an opening at the tip, and in which at least the tip of the blood collection tube including the seal is accommodated; a cylindrical needle holding part to which a needle can be attached, which is arranged to cover the outside of the tip of the holder body and is movable relative to the holder body in the axial direction of the holder body; and an extendable structure that allows the needle holding part to move relative to the holder body in the axial direction, the extendable structure having a groove-like recess provided along a first surface that is one of the outer peripheral surface of the holder body and the inner peripheral surface of the needle holding part, and a protrusion that is provided on a second surface that is the other of the outer peripheral surface of the holder body and the inner peripheral surface of the needle holding part, facing the first surface, and that engages with the recess; and the blood collection tube holder is configured such that the axial distance between the tip wall of the holder body and the tip of the needle holding part changes as the needle holding part moves in the axial direction relative to the holder body.

[0007] With this blood collection tube holder, the axial distance between the holder body and the needle holding part can be changed, so one blood collection tube holder can accommodate multiple types of blood collection tubes with different tip shapes, including the seal. This eliminates the need to prepare a blood collection tube holder for each blood collection tube with a different tip shape, simplifying the blood collection process and reducing costs and simplifying parts management.

[0008] (2) In the blood collection tube holder described in (1) above, the recess may be formed at an angle relative to the axial direction of the holder body and the circumferential direction of the first surface, and the needle holding portion may be moved in the axial direction of the holder body by rotating the needle holding portion relative to the holder body.

[0009] With this configuration, the operation direction of the needle holding part relative to the holder body is a rotation direction, making it easy for the user to operate.

[0010] (3) In the blood collection tube holder described in (1) above, the recess may be formed linearly along the axial direction of the holder body, and the needle holding portion may be moved in the axial direction of the holder body by moving the needle holding portion relative to the holder body.

[0011] With this configuration, the extension length of the recess can be made shorter and the amount of manipulation of the needle holding portion by the user can be reduced compared to a configuration in which the manipulation direction of the needle holding portion is a rotational direction.

[0012] (4) In the blood collection tube holder described in (2) or (3) above, the telescopic structure may include a holding mechanism provided in the recess that holds the needle holding part by preventing axial movement of the needle holding part relative to the holder body, and the holding mechanism may include a tip-side holding part that holds the needle holding part when the needle holding part moves toward the tip and is extended away from the tip wall of the holder body, and a base-side holding part that holds the needle holding part when the needle holding part moves toward the base end and is contracted so that the needle holding part approaches the tip wall relative to when the needle holding part is extended.

[0013] With this configuration, when the needle holding section moves toward the distal end and is extended, it is held by the distal holding section, thereby effectively holding the needle holding section in the extended state.When the needle holding section moves toward the proximal end and is contracted, it is held by the proximal holding section, thereby effectively holding the needle holding section in the contracted state.This effectively prevents the needle holding section from extending or retracting during blood collection.

[0014] (5) In the blood collection tube holder described in (4) above, the recess may have an intermediate portion provided between the tip-side holding portion and the base-side holding portion, and the tip-side holding portion and the base-side holding portion may extend in a direction that intersects the axial direction of the holder body and intersects the extension direction of the intermediate portion.

[0015] With this configuration, when the needle holding portion moves, the needle holding portion can be moved in a direction intersecting the direction of movement, allowing the protrusions to easily and effectively engage with and hold the tip end holding portion and the base end holding portion.

[0016] (6) In the blood collection tube holder described in (2) or (3) above, the first surface may have an insertion recess extending from the recess to the tip of the first surface, and the insertion recess may have a detachment prevention portion that prevents the protrusion from detaching from the recess.

[0017] With this configuration, by providing the insertion recess with the anti-detachment portion, it is possible to effectively prevent the protrusion from being detached from the recess through the insertion recess.

[0018] (7) In the blood collection tube holder described in (6) above, the fall-out prevention part may have a step part provided adjacent to the recess.

[0019] With this configuration, the step portion is provided adjacent to the recessed portion, so that the detachment prevention portion can be easily realized.

[0020] (8) In the blood collection tube holder according to any one of (1) to (7) above, at least two of the recesses and at least two of the protrusions may be provided.

[0021] This configuration allows the needle holding portion to be moved stably relative to the holder body. [Effects of the Invention]

[0022] According to the present invention, a blood collection tube holder includes a holder body that accommodates the tip of a blood collection tube, a needle holding portion to which a needle can be attached and that can move axially relative to the holder body, and an extendable structure that allows the needle holding portion to move axially relative to the holder body, and the extendable structure allows the axial distance between the holder body and the needle holding portion to be changed. Therefore, a single blood collection tube holder can accommodate multiple types of blood collection tubes with different tip shapes, including the seal. As a result, there is no need to prepare a blood collection tube holder for each blood collection tube with a different tip shape, simplifying the blood collection process and reducing costs and simplifying parts management. [Brief explanation of the drawings]

[0023] [Figure 1] FIG. 1 is a perspective view showing the appearance of a blood collection tube holder according to a first embodiment of the present invention. [Figure 2] FIG. 2 is an exploded perspective view of the blood collection tube holder shown in FIG. [Figure 3] FIG. 3 is a longitudinal cross-sectional view of the blood collection tube holder. [Figure 4] FIG. 4 is a side view of the holder body. [Figure 5] FIG. 5 is a plan view of the blood collection tube holder as seen from the needle holding part side. [Figure 6] FIG. 6 is a side view of the blood collection tube holder in an extended state. [Figure 7] FIG. 7 is a first explanatory diagram of blood collection using a blood collection tube holder. [Figure 8] FIG. 8 is a second explanatory diagram of blood collection using the blood collection tube holder. [Figure 9] FIG. 9 is a longitudinal cross-sectional view of the blood collection tube holder in an extended state. [Figure 10] FIG. 10 is an explanatory diagram of blood collection using the blood collection tube holder of FIG. [Figure 11] FIG. 11 is an exploded perspective view of a blood collection tube holder according to a second embodiment of the present invention. [Figure 12] 12A and 12B are side and cross-sectional views of the blood collection tube holder shown in FIG. [Figure 13] Figure 13A is a side view of the blood collection tube holder in an extended state, and Figure 13B is a cross-sectional view of the blood collection tube holder shown in Figure 13A. DETAILED DESCRIPTION OF THE INVENTION

[0024] As shown in FIG. 1, the blood collection tube holder 10A according to the first embodiment is used to hold a blood collection tube T (see FIG. 3) used when collecting blood from a living body B (see FIG. 7).

[0025] 2, blood collection tube holder 10A includes a cylindrical holder body 12A, a cylindrical needle holding part 14 provided to cover the outside of the tip of holder body 12A, and an extendable structure 16A that allows needle holding part 14 to move in the axial direction relative to holder body 12A. The tip of holder body 12A is the end portion in the tip direction along the axial direction of holder body 12A where needle holding part 14 is provided, and the base end of holder body 12A is the end portion in the base direction along the axial direction of holder body 12A.

[0026] The holder body 12A has a lumen 18, a distal end wall 20, and a flange 22. The holder body 12A is formed in a cylindrical shape. The lumen 18 is provided inside the holder body 12A. The lumen 18 extends in the axial direction of the holder body 12A. As shown in FIG. 3, the distal end portion of a blood collection tube T, including a tube distal end 621, can be inserted into the lumen 18. The tube distal end 621 of the blood collection tube T is the distal end of a cap 661 (see FIG. 3), which will be described later. Note that the blood collection tube T is not limited to a configuration in which only the distal end portion, including the tube distal end 621, is inserted into the lumen 18. For example, the blood collection tube T may be inserted into the lumen 18 up to an intermediate portion, including the distal end portion. Furthermore, the blood collection tube T may be inserted into the lumen 18 of the holder body 12A up to the base end.

[0027] The tip wall 20 is provided at the tip of the holder body 12A. The tip wall 20 is perpendicular to the axial direction of the holder body 12A. An opening 26 is provided in the center of the tip wall 20. The opening 26 penetrates the tip wall 20. The tip portion of the blood collection tube T is inserted into the inner cavity 18 of the holder body 12A from the base end of the holder body 12A. When the tip portion of the blood collection tube T is inserted, the tube tip 621 of the blood collection tube T abuts against the inner surface of the tip wall 20. The blood collection tube T is held in a state where it is positioned axially relative to the holder body 12A. A flange 22 is provided at the base end of the holder body 12A. The flange 22 protrudes radially outward from the outer circumferential surface 24 of the holder body 12A.

[0028] Needle holder 14 is formed so that needle body 28 can be attached thereto. Needle holder 14 is provided so as to be movable relative to holder body 12A in the axial direction of holder body 12A.

[0029] The needle holding part 14 has a tubular part 141 and a wall part 142 provided at the tip of the tubular part 141. The tubular part 141 is formed in a cylindrical shape. The tubular part 141 is provided so as to cover the outer peripheral surface 24 of the holder body 12A. The inner peripheral surface 30 of the needle holding part 14 (tubular part 141) faces the outer peripheral surface 24 of the holder body 12A. The wall part 142 is perpendicular to the axial direction of the needle holding part 14. The wall part 142 has an attachment hole 32 in the center thereof, into which the needle body 28 is attached. The attachment hole 32 passes through the wall part 142 in the axial direction. The needle body 28 is attached to the needle holding part 14 via the attachment hole 32.

[0030] As shown in FIG. 1, the telescopic structure 16A changes the axial distance L between the distal end wall 20 of the holder body 12A and the distal end of the needle holder 14 by moving the needle holder 14 axially relative to the holder body 12A. As shown in FIG. 2, the telescopic structure 16A has a groove-shaped recess 34A and a protrusion 36 that engages with the recess 34A. The recess 34A is provided along a first surface S1. The first surface S1 is provided on the outer peripheral surface 24 of the holder body 12A, which is one side of the inner peripheral surface 30 of the needle holder 14. As shown in FIG. 3, the protrusion 36 is provided on a second surface S2. The second surface S2 is provided on the inner peripheral surface 30 of the needle holder 14, which is the other side of the outer peripheral surface 24 of the holder body 12A and faces the first surface S1. Below, we will explain the case where the first surface S1 is the outer peripheral surface 24 of the holder body 12A as shown in FIG. 4, and the second surface S2 is the inner peripheral surface 30 of the needle holding part 14 as shown in FIG. 3. Note that when the inner peripheral surface 30 of the needle holding part 14 is the first surface S1, the outer peripheral surface 24 of the holder body 12A is the second surface S2. As shown in FIG. 5, at least two recesses 34A and two protrusions 36 are provided. Below, we will explain the case where a pair of recesses 34A and a pair of protrusions 36 are provided as shown in FIG. Note that the number of recesses 34A and protrusions 36 is not limited to two or more. For example, there may be one recess 34A and one protrusion 36.

[0031] As shown in FIG. 4, the recesses 34A are grooves recessed radially inward from the outer peripheral surface 24 (first surface S1) of the holder body 12A. The recesses 34A extend in the axial direction of the holder body 12A and at an angle relative to the circumferential direction of the outer peripheral surface 24. In a plan view of the blood collection tube holder 10A shown in FIG. 5, the pair of recesses 34A are arranged symmetrically about the axis of the holder body 12A. As shown in FIG. 4, the recesses 34A extend along the circumferential direction of the holder body 12A. As shown in FIG. 2, the recesses 34A include a first end 381 and a second end 382. The first end 381 is one end of the recesses 34A in the extension direction. The second end 382 is the other end of the recesses 34A in the extension direction and is arranged in the opposite direction to the first end 381. The first end 381 is arranged away from the tip of the holder body 12A. The first end 381 is disposed in the proximal direction, closer to the flange 22 than the tip of the holder body 12A. The second end 382 is disposed in the distal direction of the holder body 12A relative to the first end 381. The first end 381 and the second end 382 are spaced apart in the circumferential direction of the holder body 12A. As shown in FIG. 5, when viewed along the axial direction of the needle holding part 14, the first end 381 and the second end 382 are spaced apart by approximately 90°. As shown in FIG. 2, the recess 34A has an intermediate portion 383 between the first end 381 and the second end 382.

[0032] As shown in Figure 3, the protrusions 36 are projections that protrude from the inner circumferential surface 30 of the tubular portion 141 of the needle holding part 14. The protrusions 36 protrude radially inward from the inner circumferential surface 30 of the tubular portion 141. The pair of protrusions 36 are arranged symmetrically about the axis of the needle holding part 14 (see Figure 5). The pair of protrusions 36 are inserted into and engaged with the pair of recesses 34A of the holder body 12A.

[0033] 2, the telescopic structure 16A further includes a holding mechanism 42A. The holding mechanism 42A is provided in the recess 34A and holds the needle holding part 14 by preventing it from moving in the axial direction relative to the holder body 12A. The holding mechanism 42A includes a base-end holding part 44A and a tip-end holding part 46A.

[0034] As shown in Fig. 4, the base-end holding portion 44A is provided at a first end 381 of the recess 34A. The base-end holding portion 44A extends in a direction that intersects the axial direction of the needle holding portion 14 and the holder body 12A and intersects the extension direction of the intermediate portion 383 of the recess 34A. The base-end holding portion 44A is perpendicular to the axial direction of the needle holding portion 14 and extends along the circumferential direction of the needle holding portion 14. The base-end holding portion 44A extends in a direction away from the intermediate portion 383.

[0035] When blood collection tube holder 10A is in a contracted state in which needle holding portion 14 has moved proximally relative to holder body 12A, protrusion 36 engages with proximal holding portion 44A. When blood collection tube holder 10A is in a contracted state, needle holding portion 14 is held by proximal holding portion 44A.

[0036] As shown in Fig. 6, the tip side holding portion 46A is provided at the second end 382 of the recess 34A. The tip side holding portion 46A extends in a direction that intersects the axial direction of the needle holding portion 14 and the holder body 12A and intersects the extension direction of the intermediate portion 383 of the recess 34A. The tip side holding portion 46A is perpendicular to the axial direction of the needle holding portion 14 and extends along the circumferential direction of the needle holding portion 14. The tip side holding portion 46A extends in a direction away from the intermediate portion 383. In the circumferential direction of the needle holding portion 14, the base side holding portion 44A and the tip side holding portion 46A extend in directions that move them away from each other with the intermediate portion 383 between them.

[0037] When blood collection tube holder 10A is in an extended state in which needle holding portion 14 has moved toward the distal end relative to holder body 12A, protrusion 36 engages with distal end holding portion 46A. When blood collection tube holder 10A is in an extended state, needle holding portion 14 is held by distal end holding portion 46A.

[0038] As shown in Figure 4, an insertion recess 48 is provided on the outer peripheral surface 24 of the holder body 12A, extending from the tip of the holder body 12A to the recess 34A. The insertion recess 48 is an introduction path for moving the protrusion 36 to the recess 34A when the needle holding part 14 is assembled to the tip of the holder body 12A.

[0039] The insertion recess 48 extends in the axial direction of the holder body 12A to the tip of the outer peripheral surface 24. The insertion recess 48 is a groove recessed radially inward with respect to the outer peripheral surface 24 of the holder body 12A. The insertion recess 48 extends in the axial direction of the holder body 12A. The insertion recess 48 is connected to the first end 381 of the recess 34A. The insertion recess 48 extends in the axial direction from the first end 381 toward the tip of the holder body 12A.

[0040] The insertion recess 48 includes a removal prevention portion 50 and an insertion guide portion 52. The removal prevention portion 50 prevents the protrusion 36 from being removed from the recess 34A. The removal prevention portion 50 has a step portion 501 provided adjacent to the recess 34A. In the radial direction of the needle holding portion 14, the step portion 501 protrudes radially outward beyond the inner surface of the recess 34A (see FIG. 3). The step portion 501 may be provided in a part of the insertion recess 48 adjacent to the recess 34A, or may be provided in a range along the extension direction of the insertion recess 48.

[0041] The insertion guide portion 52 is provided on the tip side of the slip-out prevention portion 50 (step portion 501). As shown in FIG. 3, the insertion guide portion 52 is inclined radially inward toward the tip of the holder body 12A. As shown in FIG. 4, the insertion guide portion 52 is formed along the extension direction of the insertion recess 48. When the needle holding portion 14 is assembled to the tip of the holder body 12A, the protrusion 36 moves along the insertion guide portion 52 toward the recess 34A.

[0042] Next, a case where blood is collected using the blood collection tube holder 10A will be described. Here, the initial state is a contracted state in which the protrusion 36 of the needle holding part 14 is engaged with the base-end holding part 44A and the needle holding part 14 is close to the holder main body 12A, as shown in Fig. 4, and the case where the blood collection tube holder 10A is used in the initial state will be described.

[0043] First, as shown in FIG. 3, the needle body 28 is attached to the needle holding unit 14. The needle body 28 has a hollow needle 281 and a needle hub 282 that holds the needle 281, and the longitudinal center of the needle 281 is held by the needle hub 282. A needle tip portion 283A exposed from the needle hub 282 toward the tip is the site that is to be punctured into the skin of living body B (see FIG. 7). As shown in FIG. 7, when a user inserts the needle hub 282 of the needle body 28 into the attachment hole 32 of the needle holding unit 14, the needle hub 282 is held by the wall portion 142. When the needle body 28 is attached to the tip of the blood collection tube holder 10A, the needle tip portion 283A is exposed toward the tip of the needle holding unit 14. A needle base end portion 283B protrudes from the needle hub 282 toward the base end. The needle base end portion 283B is covered by a tubular needle cover 284 in a sterilized state. The needle cover 284 is made of, for example, elastic rubber, etc. The needle base end 283B covered by the needle cover 284 is housed in the inner cavity 18 of the holder body 12A.

[0044] Next, after the needle tip portion 283A of the needle body 28 is punctured into the skin (blood vessel BV) of the living body B, the first blood collection tube T1 is attached to the blood collection tube holder 10A as shown in FIG. 8. The first blood collection tube T1 is formed in a cylindrical shape with an opening 60A. The first blood collection tube T1 includes a transparent tubular body 60 and a first sealing body 641 that seals the open tip 611 of the tubular body 60. The open tip 611 has an opening 60A. The first sealing body 641 closes the opening 60A of the open tip 611. The first sealing body 641 includes a cap 661 and a first stopper 681 that closes the hole 67 of the cap 661. The first stopper 681 has a recessed portion 681a at the center of its tip into which a part of the needle cover 284 can be inserted. The recessed portion 681a is recessed from the tip of the first stopper 681 toward the base end. First stopper 681 protrudes distally from open tip 611 of tubular body 60. The tip of cap 661 is disposed distally away from first stopper 681. The tip of cap 661 is tube tip 621 of first blood collection tube T1.

[0045] The distal end of the first blood collection tube T1 is inserted into the lumen 18 from the proximal end of the holder body 12A and pushed toward the distal end until the tube distal end 621 (the distal end of the cap 661) of the first blood collection tube T1 abuts against the distal end wall 20 of the holder body 12A. When the tube distal end 621 of the first blood collection tube T1 abuts against the distal end wall 20 of the holder body 12A, the first blood collection tube T1 is positioned toward the distal end relative to the blood collection tube holder 10A, and movement of the first blood collection tube T1 toward the distal end is prevented. With the tube distal end 621 of the first blood collection tube T1 abutting against the distal end wall 20 of the holder body 12A, the needle proximal end 283B of the needle 281 is inserted into the recess 681a of the first stopper 681 together with the needle cover 284. The needle proximal end 283B penetrates the end of the needle cover 284 and punctures the first stopper 681 of the first blood collection tube T1. The needle base end 283B of the needle 281 penetrates the first stopper 681 in the proximal direction. As the needle base end 283B punctures the first stopper 681, the needle hub 282 and the first stopper 681 approach each other in the axial direction, causing the needle cover 284 to be compressed and contracted in the axial direction. Blood from the living subject B is introduced into the tubular body 60 of the first blood collection tube T1 through the lumen of the needle 281. After a predetermined amount of blood has been introduced into the first blood collection tube T1, the first blood collection tube T1 is removed from the blood collection tube holder 10A. After the first blood collection tube T1 is removed, the needle body 28 is removed from the skin of the living subject B together with the blood collection tube holder 10A.

[0046] Next, a case where a second blood collection tube T2 (see FIG. 9), which is separate from the first blood collection tube T1, is attached to the blood collection tube holder 10A will be described. The shape of the tip portion (including tube tip 622) of the second blood collection tube T2 is different from the shape of the tip portion (including tube tip 621) of the first blood collection tube T1, and the second seal 642 of the second blood collection tube T2 is shorter than the first seal 641 of the first blood collection tube T1 in the axial direction of the second blood collection tube T2. The tube tip 622 of the second blood collection tube T2 is the tip of the cap 662.

[0047] First, as shown in FIG. 4, in the initial state (contracted state) before the needle body 28 is attached, the user rotates the needle holding part 14 in a first direction (the direction of arrow R in FIG. 5) relative to the holder body 12A. The convex part 36 of the needle holding part 14 moves from the base end side holding part 44A along the intermediate part 383, causing the needle holding part 14 to move distally relative to the holder body 12A while rotating in the first direction. As shown in FIG. 6, the convex part 36 passes through the intermediate part 383 of the recessed part 34A and engages with the distal end side holding part 46A, thereby stopping the distal movement of the needle holding part 14 relative to the holder body 12A and holding it in place. As shown in FIG. 9, the blood collection tube holder 10A is in a state in which the axial distance L between the distal end wall 20 of the holder body 12A and the distal end of the needle holding part 14 has changed due to the extendable structure 16A. That is, in the extended state, the axial distance L between the distal end wall 20 of the holder body 12A and the distal end of the needle holding part 14 is larger than in the contracted state (initial state). As a result, the distal end wall 20 of the holder body 12A and the wall part 142 of the needle holding part 14 are spaced apart in the axial direction, and the blood collection tube holder 10A is held in the extended state. A space for accommodating the needle cover 284 can be secured between the needle hub 282 of the needle body 28 and the tube distal end 622 of the second blood collection tube T2. The needle body 28 is attached to the needle holding part 14 of the blood collection tube holder 10A in the extended state.

[0048] As shown in FIG. 10, a second blood collection tube T2 is attached to the blood collection tube holder 10A with the needle tip 283A of the needle body 28 puncturing the skin (blood vessel BV) of the living body B. The second blood collection tube T2 includes a second sealing body 642 that seals the open tip 612 of the tubular body 60. The open tip 612 has an opening 60A. The second sealing body 642 closes the opening 60A of the open tip 612. The second sealing body 642 includes a cap 662 and a second stopper 682 provided at the center of the cap 662. The center of the tip of the second stopper 682 includes a recessed portion 682a into which a part of the needle cover 284 is inserted. The recessed portion 682a is recessed from the tip of the second stopper 682 toward the base end. The cap 662 is formed in a sheet shape and closes the opening 60A. The second stopper 682 is provided on the tip surface of the cap 662. The second plug 682 protrudes further toward the distal end than the cap 662. In the axial direction of the second blood collection tube T2, the second sealing body 642 of the second blood collection tube T2 is shorter than the first sealing body 641 of the first blood collection tube T1. That is, the first blood collection tube T1 and the second blood collection tube T2 are blood collection tubes T having tip portions (tube tips 621, 622) with different shapes.

[0049] The tip end of the second blood collection tube T2 is inserted into the lumen 18 of the holder body 12A and pushed in the distal direction until the tube tip 622 (tip end of the cap 662) of the second blood collection tube T2 abuts against the distal wall 20 of the holder body 12A. With the tube tip 622 of the second blood collection tube T2 abutting against the distal wall 20 of the holder body 12A, the needle base end 283B of the needle 281 pierces the end of the needle cover 284 and punctures the second stopper 682 of the second blood collection tube T2. The needle base end 283B of the needle 281 pierces the second stopper 682. As the needle base end 283B pierces the second stopper 682, the needle hub 282 and the second stopper 682 approach each other in the axial direction, causing the needle cover 284 to be compressed and contracted in the axial direction. The patient's blood is introduced into the tubular body 60 of the second blood collection tube T2 through the lumen of the needle 281. After a predetermined amount of blood has been introduced into the second blood collection tube T2, the second blood collection tube T2 is removed from the blood collection tube holder 10A. After the second blood collection tube T2 is removed, the needle body 28 is removed from the patient together with the blood collection tube holder 10A.

[0050] The first embodiment has the following advantages.

[0051] 3, the blood collection tube holder 10A includes an extension / contraction structure 16A that allows the needle holding portion 14 to move in the axial direction relative to a cylindrical holder main body 12A that can hold a blood collection tube T. The extension / contraction structure 16A has a groove-shaped recess 34A provided along the outer peripheral surface 24 (first surface S1) of the holder main body 12A, and a protrusion 36 that is provided on the inner peripheral surface 30 (second surface S2) of the needle holding portion 14 and engages with the recess 34A. As the needle holding portion 14 moves in the axial direction relative to the holder main body 12A, the axial distance L between the tip wall 20 of the holder main body 12A and the tip of the needle holding portion 14 changes.

[0052] As a result, the axial distance L between the holder main body 12A and the needle holding part 14 can be changed by the extendable structure 16A, so that one blood collection tube holder 10A can accommodate first and second blood collection tubes T1, T2 having different shapes of tip portions (tube tips 621, 622). Therefore, there is no need to prepare blood collection tube holders corresponding to the first and second blood collection tubes T1, T2 having different shapes of tip portions (tube tips 621, 622), which simplifies the blood collection operation, reduces costs, and simplifies parts management.

[0053] 2, recess 34A is formed at an angle relative to the axial direction of holder body 12A and the circumferential direction of first surface S1. By rotating needle holder 14 relative to holder body 12A, needle holder 14 moves in the axial direction of holder body 12A. This makes it easy for the user to operate needle holder 14 relative to holder body 12A, as the operation direction of needle holder 14 is the rotation direction.

[0054] Telescopic structure 16A includes a holding mechanism 42A that is provided in recess 34A and that holds needle holding part 14 by preventing it from moving axially relative to holder body 12A. Holding mechanism 42A includes a distal holding part 46A that holds needle holding part 14 when needle holding part 14 moves distally and is extended, and a proximal holding part 44A that holds needle holding part 14 when needle holding part 14 moves proximally and is contracted.

[0055] As a result, as shown in Fig. 6, distal end holding portion 46A provided in recess 34A can effectively hold needle holding portion 14 in an extended state. As shown in Fig. 4, proximal end holding portion 44A can effectively hold needle holding portion 14 in a contracted state. This effectively prevents unintended extension and retraction of needle holding portion 14 during blood collection.

[0056] 2, distal holding portion 46A and proximal holding portion 44A extend in a direction that intersects the axial direction of holder body 12A and also intersects the extending direction of intermediate portion 383 provided between distal holding portion 46A and proximal holding portion 44A. As a result, when needle holding portion 14 moves relative to holder body 12A, moving needle holding portion 14 in a direction that intersects the moving direction allows protrusion 36 to be easily and effectively engaged with and held by distal holding portion 46A and proximal holding portion 44A.

[0057] The insertion recess 48 provided on the first surface S1 is provided with a removal prevention portion 50 that prevents the protrusion 36 from being removed from the recess 34A. Thus, by providing the removal prevention portion 50 in the insertion recess 48, it is possible to effectively prevent the protrusion 36 from being removed from the recess 34A through the insertion recess 48.

[0058] The slip-out prevention portion 50 can be easily realized by having the step portion 501 provided adjacent to the recess 34A.

[0059] 5, there are provided at least two recesses 34A and at least two protrusions 36. This allows the needle holding portion 14 to be moved stably relative to the holder body 12A.

[0060] 11, the blood collection tube holder 10B according to the second embodiment includes an extendable structure 16B that allows the needle holding part 14 to move in the axial direction relative to the holder main body 12B. Note that the same reference numerals are used for the same components as those of the blood collection tube holder 10A according to the first embodiment, and detailed description thereof will be omitted.

[0061] 12A, the extendable structure 16B has a groove-shaped recess 34B provided along the outer peripheral surface 24 (first surface S1) of the holder body 12B, and a protrusion 36 provided on the inner peripheral surface 30 (second surface S2) of the needle holding part 14 and engaged with the recess 34B. Note that the first surface S1 may be the inner peripheral surface 30 of the needle holding part 14, and the second surface S2 may be the outer peripheral surface 24 of the holder body 12B.

[0062] The recess 34B is a groove recessed radially inward from the outer peripheral surface 24 of the holder body 12B. The recess 34B is formed linearly along the axial direction of the holder body 12B. An insertion recess 48 is provided in the outer peripheral surface 24 of the holder body 12B, extending from the upper end of the recess 34B to the tip of the holder body 12B.

[0063] Telescopic structure 16B further includes a holding mechanism 42B. Holding mechanism 42B is provided in recess 34B and holds needle holding portion 14 by preventing axial movement of needle holding portion 14 relative to holder body 12B. Holding mechanism 42B includes a base-end holding portion 44B and a tip-end holding portion 46B.

[0064] The proximal holding portion 44B is provided at a first end 701 of the recess 34B. The first end 701 is provided at the lower end of the recess 34B. The lower end of the recess 34B is the end on the flange 22 side in the axial direction of the holder body 12B. The upper end of the recess 34B is the end on the distal wall 20 side, opposite the flange 22 in the axial direction of the holder body 12B. The proximal holding portion 44B extends in a direction that intersects the axial direction of the needle holding portion 14 and the holder body 12B and intersects the extension direction of the recess 34B. The proximal holding portion 44B is perpendicular to the axial direction of the needle holding portion 14 and extends along the circumferential direction of the needle holding portion 14 relative to the recess 34B. When the blood collection tube holder 10B is in a contracted state in which the needle holding portion 14 has moved proximally, the protrusion 36 engages with the proximal holding portion 44B.

[0065] The tip side holding portion 46B is provided at a second end 702 of the recess 34B. The second end 702 is provided at the upper end of the recess 34B. The tip side holding portion 46B extends in a direction that intersects the axial direction of the needle holding portion 14 and the holder body 12B and intersects the extension direction of the recess 34B. The tip side holding portion 46B is perpendicular to the axial direction of the needle holding portion 14 and extends along the circumferential direction of the needle holding portion 14 relative to the recess 34B. When the blood collection tube holder 10B is in an extended state in which the needle holding portion 14 has moved toward the tip, the protrusion 36 engages with the tip side holding portion 46B. The base side holding portion 44B and the tip side holding portion 46B are parallel to each other and spaced apart in the axial direction of the needle holding portion 14.

[0066] As shown in FIG. 12B, when the first blood collection tube T1 is attached to the blood collection tube holder 10B, the needle holding portion 14 is moved proximally by the telescopic structure 16B to a contracted state. As shown in FIG. 12A, the convex portion 36 of the needle holding portion 14 is engaged with and held by the proximal holding portion 44B of the concave portion 34B. As shown in FIG. 12B, by attaching the needle body 28 and the first blood collection tube T1 to the blood collection tube holder 10B, the needle proximal end portion 283B of the needle body 28 punctures the first stopper 681 of the first blood collection tube T1. The needle 281 of the needle body 28 communicates with the tubular body 60 of the first blood collection tube T1, enabling blood collection.

[0067] As shown in FIG. 13B, when the second blood collection tube T2 is attached to the blood collection tube holder 10B, the needle holding portion 14 is moved toward the distal end by the telescopic structure 16B to an extended state. As shown in FIG. 13A, the convex portion 36 of the needle holding portion 14 is engaged with and held by the distal end holding portion 46B of the concave portion 34B. As shown in FIG. 13B, by attaching the needle body 28 and the second blood collection tube T2 to the blood collection tube holder 10B, the needle base end portion 283B of the needle body 28 punctures the second stopper 682 of the second blood collection tube T2. The needle 281 of the needle body 28 communicates with the tubular body 60 of the second blood collection tube T2, enabling blood collection.

[0068] The second embodiment has the following advantages.

[0069] 11, recess 34B of telescoping structure 16B is formed linearly along the axial direction of holder body 12B. By moving needle holder 14 in the axial direction relative to holder body 12B, needle holder 14 moves in the axial direction of holder body 12B. This allows the extension length of recess 34B to be shorter and the amount of manipulation of needle holder 14 by the user to be reduced compared to a configuration in which needle holder 14 is manipulated in a rotational direction.

[0070] The present invention is not limited to the above disclosure, and various configurations can be adopted without departing from the gist of the present invention. [Explanation of symbols]

[0071] 10A, 10B... blood collection tube holder 12A, 12B...Holder body 14...Needle holding part 16A, 16B…Stretch structure 18...lumen 20…Tip wall 24…Outer surface 26…Aperture 28...Needle body 30…Inner peripheral surface 34A, 34B...recesses 36...Convex part 621, 622…tube tip 641...first sealing body 642...Second sealing body S1...Side 1 S2...Side 2 T… Blood collection tube T1…First blood collection tube T2…Second blood collection tube

Claims

1. A blood collection tube holder for holding a cylindrical blood collection tube whose open tip is sealed by a sealing body, a cylindrical holder body having an inner cavity and a distal end wall with an opening at a distal end, the holder body accommodating at least the distal end of the blood collection tube including the sealing body; a cylindrical needle holding portion to which a needle body can be attached, which is provided so as to cover the outside of the tip of the holder body and which is movable relative to the holder body in the axial direction of the holder body; an extendable structure that allows the needle holding portion to move relative to the holder body in the axial direction; Equipped with The extension structure includes a groove-shaped recess provided along a first surface, which is one of an outer peripheral surface of the holder body and an inner peripheral surface of the needle holding portion; a protrusion provided on a second surface, which is the other of the outer peripheral surface of the holder body and the inner peripheral surface of the needle holding portion and faces the first surface, and which engages with the recess; and A blood collection tube holder in which the axial distance between the tip wall of the holder body and the tip of the needle holding part changes when the needle holding part moves in the axial direction relative to the holder body.

2. 2. The blood collection tube holder according to claim 1, the recess is formed to be inclined with respect to the axial direction of the holder body and the circumferential direction of the first surface, A blood collection tube holder, wherein the needle holding part moves in the axial direction of the holder body by rotating the needle holding part relative to the holder body.

3. 2. The blood collection tube holder according to claim 1, The recess is formed linearly along the axial direction of the holder body, A blood collection tube holder in which the needle holding part moves in the axial direction of the holder body by moving the needle holding part in the axial direction relative to the holder body.

4. 4. The blood collection tube holder according to claim 2, the telescopic structure includes a holding mechanism that is provided in the recess and that holds the needle holding part by preventing it from moving in the axial direction relative to the holder body, the holding mechanism includes a distal end side holding portion that holds the needle holding portion when the needle holding portion moves in a distal direction and is extended away from the distal end wall of the holder body; a proximal-side holding portion that holds the needle holding portion when the needle holding portion moves in a proximal direction and when the needle holding portion is contracted and approaches the distal wall relative to when the needle holding portion is extended; A blood collection tube holder comprising:

5. 5. The blood collection tube holder according to claim 4, the recess has an intermediate portion provided between the distal end side holding portion and the proximal end side holding portion, The tip-side holding portion and the base-side holding portion extend in a direction that intersects the axial direction of the holder body and also intersects the extending direction of the intermediate portion.

6. 4. The blood collection tube holder according to claim 2, The first surface is provided with an insertion recess extending from the recess to a tip of the first surface, The insertion recess is provided with a fall-out prevention portion that prevents the protrusion from falling out of the recess.

7. 7. The blood collection tube holder according to claim 6, The blood collection tube holder, wherein the fall-out prevention portion has a stepped portion provided adjacent to the recessed portion.

8. 2. The blood collection tube holder according to claim 1, The blood collection tube holder has at least two recesses and at least two protrusions.

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