JPH0128589B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a blood sampling needle holder (hereinafter referred to as holder) and a vacuum blood sampling device using the same. More specifically, the present invention relates to a holder used for collecting blood from a human body for blood tests, blood sedimentation tests, etc., and a vacuum blood sampler using the same.

[Prior Art] FIG. 7 shows a conventional holder 2 and a vacuum extractor C using the same. 1 is a blood collection needle, 3
is a vacuum blood collection tube (hereinafter referred to as blood collection tube). In the vacuum blood collection device C, the blood collection needle 1 is fixed to the base of the holder 2, and when the blood collection tube 3 is inserted from the open end of the holder 2 and communicated with the blood collection needle 1, the blood collection tube is evacuated in advance. Blood will be collected within 3 days.

As shown in FIG. 8, in the conventional holder 2, the male thread 1a provided on the hub of the blood collection needle 1 is screwed into the female thread 2a provided on the fixing part of the holder 2, thereby fixing both. That's what I do.

[Problems to be Solved by the Invention] However, in the conventional example, in order to attach and detach the blood sampling needle 1 to the holder 2, the blood sampling needle 1 must be screwed in and unscrewed each time. The problem is that it takes a lot of time and it hurts my hands and fingers. Further, there is a problem in that it is difficult to attach the blood sampling needle 1 with the blade surface properly facing upward, and the degree of screwing must be adjusted.

SUMMARY OF THE INVENTION In view of the above circumstances, it is an object of the present invention to provide a holder in which the operation of attaching and detaching a blood sampling needle is extremely simple and the blade surfaces can be easily aligned, and a vacuum blood sampling device using the same.

[Means for Solving the Problem] The holder of the present invention has a cylindrical fixing part for inserting and fixing a blood collection needle having an engaging recess into a hub, and the fixing part is provided with a biasing force of a spring. A structure is adopted in which an engaging tool is attached which engages with the engaging recess and fixes the hub to the fixing part.

Further, the vacuum blood collection device of the present invention includes a blood collection needle having a substantially cylindrical hub, a holder having a cylindrical fixing portion for inserting and fixing the hub of the blood collection needle, and a vacuum blood collection device, The hub is provided with an engaging recess, and the fixing part of the holder is provided with an engaging tool that engages with the engaging recess by the urging force of a spring and fixes the hub to the fixing part.

[Function] In the holder of the present invention and the vacuum blood collection device using the same, the hub of the blood collection needle inserted into the fixed portion of the holder is fixed by the engagement tool that engages with the engagement recess. The blood collection needle can be removed by disengaging the engagement tool against the biasing force of the spring and pulling out the hub in the axial direction. In the present invention, the blood collection needle does not need to be screwed in and unscrewed, and the blood collection needle can be attached and removed only by the engagement automatically generated by the biasing force of the spring and the action of compressing the spring. , its operation is extremely easy and can be done with one touch.

Furthermore, since the blood sampling needle can freely rotate around its axis, the blade surfaces can be aligned freely.

[Example] Next, embodiments of the present invention will be described.

FIG. 1 is a perspective view of a vacuum blood collection device A according to an embodiment of the present invention, FIG. 2 is a front cross-sectional view of a holder and a blood collection needle according to an embodiment of the present invention, and FIG. -A cross-sectional view taken along the I line; Figure 4 is a cross-sectional view of the main parts when the blood collection needle is attached to the holder;
FIG. 5 is a sectional view of a main part showing an operation for removing a blood collection needle from a holder, and FIG. 6 is a sectional view of a main part of a vacuum blood sampler B according to another embodiment.

FIG. 1 shows a blood sampling needle 1 constituting a vacuum blood sampling device A;
Holder 2 and blood collection tube 3 are shown. As shown in FIG. 2, the blood sampling needle 1 is a long needle (hereinafter referred to as a puncturing part 11) that is inserted into a blood vessel in the human body.
) and a short needle (hereinafter referred to as introduction section 12 ) that communicates with the puncture section 11 and whose needle tip extends in the opposite direction. A hub 13 is provided. The hub 13 is preferably made of plastic such as polypropylene, and has a flange 14 formed on the outer periphery on the puncture section 11 side, and an engagement recess 15 formed in an annular groove on the introduction section 12 side. There is. The outer periphery on the side of the insertion portion 12 may be formed into a cylindrical shape with the same diameter, but in order to facilitate insertion, the outer periphery may be formed into a tapered surface 16.
It is preferable to form the Reference numeral 17 denotes a rubber shaft made of a rubber membrane and placed over the introduction part 12.

As shown in FIG. 2, the holder 2 includes a base portion 21 and a guide portion 22, and has a syringe-like shape as a whole. The base 21
is a member made of stainless steel (for example, SUS304) consisting of a small-diameter cylindrical part and a large-diameter cylindrical part, which enables steam sterilization and can be used repeatedly. The small-diameter cylindrical portion constitutes the fixing portion 23, and a female thread 25 is formed on the inner periphery of the large-diameter cylindrical portion 24. The guide part 22 is a cylindrical member made of synthetic resin such as plastic, and has a male screw 2 formed on the outer periphery of the tip.
6 is screwed into the female screw 25 to be integrally connected to the base 21. Note that 27 is a flange formed on the open end side of the guide portion 22.

The fixing part 23 has an inner periphery 40 serving as an insertion part into which the hub 13 of the blood collection needle 1 is inserted, and also has a guide hole bored through it in the diametrical direction, as shown in FIGS. A hole 41 is provided. An engagement tool 42 is inserted into the guide hole 41. The engagement member 42 is an elongated plate-like member whose upper and lower ends are bent into an L-shape, with the upper end forming a pressing portion 43 and the lower end forming a stopper 44. An opening 45 is bored slightly below the center of the engagement tool 42, and the opening 45 engages only the engagement recess 15 with the large diameter opening 46 that allows the passage of the hub 13 of the blood collection needle 1. It is formed into a gourd shape with a matching small diameter opening 47. A supporting portion 48 is provided on the lower surface of the pressing portion 43, and the fixing portion 2
A spring seat 49 is provided on the upper surface of 3, and a spring 50, which is a compression spring, is interposed between them. The engagement member 42 is always urged in the upward direction by the spring 50, so that the lower edge of the small diameter opening 47 is located approximately in the vicinity of the center within the inner periphery 40 of the fixed portion 23.

The blood collection tube 3 shown in FIG. 1 is a test tube-like member on a cylinder with a bottom, and its open end is tightly connected to a transparent or translucent blood collection part 31 made of glass or synthetic resin such as polypropylene. The inside is made to be in a vacuum state in advance during the manufacturing stage. By piercing the rubber stopper 32 with the introduction part 12 of the blood collection needle 1 fixed to the holder 2, blood can be collected into the blood collection part 31 through the puncture part 11 inserted into the blood vessel of the human body. ing.

Next, the procedure for attaching and detaching the blood sampling needle 1 will be explained. When attaching the blood collection needle 1 to the holder 2, the holder 42
Press down slightly with your finger, and insert the introduction part 12 of the blood collection needle 1 into the holder 2 as shown by arrow E in FIG.
Insert it toward the fixed part 23 of. Then, the hub 13 of the blood collection needle 1 passes through the large-diameter opening 46 of the holder 42 and fits inside the fixing part 23. In addition, when inserting the blood collection needle 1, the opening 45 of the engagement tool 42 can be pushed down with the tapered surface 16 of the hub 13, without pressing down the holder 42.
The engagement recess 15 of the inserted blood collection needle 1 is connected to the engagement tool 42
When the engagement tool 42 is aligned with the opening 45 of the engagement recess 15, the engagement tool 42 is pulled up by the biasing force of the spring 50, and as shown in FIG.
7 are fitted together and fixed within the fixing portion 23 of the hub 13. At this time, the flange 14 comes into contact with the end surface of the fixing part 23, and the blood collection needle 1 is held against the holder 2 so that it does not wobble.

In this embodiment, the hub 13 of the blood sampling needle 1 is
The blood collection needle 1 can be attached by simply inserting the needle into the fixing part 23 of the holder 2, so the operation is very easy and can be performed with one touch.

Since the blood sampling needle 1 can freely rotate T around the axis, the blade surfaces 18 of the puncture section 11 can be freely aligned, such as by turning the blade surface 18 upward.

Next, when removing the blood collection needle 1 from the holder 2, as shown in FIG.
Simply pull out the blood collection needle 1 in the direction of arrow R, and the hub 1
3 can be disengaged from the retainer 42 and removed. In this way, the removal of the blood sampling needle 1 is also extremely easy. In addition, if a small spring that can spring in the axial direction is installed in the fixed part 23 of the holder 2, when the engagement tool 42 is disengaged from the hub 13, the hub 13 will be pushed out slightly in the R direction. It is also possible to remove the blood collection needle 1 with one touch.

In this embodiment, when actually collecting blood, as shown in FIG. 4, the blood collection needle 1 is fixed to the holder 2, and the puncture part 11 of the blood collection needle 1 is inserted into the blood vessel of the human body. , then insert the blood collection tube 3 into the guide part 22 of the holder 2, and close the rubber stopper 3.
2 can be pierced with the introduction part 12. After collecting a specified amount of blood, the blood collection tube 3 can be pulled out. If the blood collection needle 1 is of a type that can collect blood any number of times with a single puncture, it is of course possible to repeatedly collect blood by simply inserting the blood collection tube 3 again.

Next, another embodiment B will be explained based on FIG.
In this embodiment B, the fixing part 23 of the holder 2
A pin 60 is provided as an engagement tool.
The pin 60 is inserted into a guide tube 61 attached to the outer periphery of the fixed part 23 so that it can protrude toward the center, and its upper end is connected to a lever 62. The lever 62 is swingably supported on a support base 63, and the lever 62 and the fixed part 2
A spring 6, which is a compression spring, is connected between the upper surface of 3 and the top surface of 3.
4 is interposed. In addition, the hub 13 of the blood collection needle 1
The structure is substantially the same as that of the previous embodiment, and a flange 14 and an engaging recess 15 are formed.

In this embodiment B, the pin 60 engages with the engagement recess 15 of the blood sampling needle 1 due to the biasing force of the spring 64, thereby fixing the blood sampling needle 1 to the holder 2. Therefore, push the lever 62 a little and release the pin 6.
0 is slightly pulled up, insert the hub 13 of the blood collection needle 1 into the fixed part 23, then release your finger from the lever 62, and the pin 60 will engage with the engagement recess 15 by the biasing force of the spring 64. Once attached, the blood sampling needle 1 can be removed by pushing down the lever 62 and pulling out the blood sampling needle 1.
In this way, the blood sampling needle 1 can be attached and detached very easily in this embodiment as well.

Although the embodiments of the present invention have been described above, various modifications can be made to the present invention without departing from the gist thereof.

[Effects of the Invention] In the blood collection needle holder of the present invention and the vacuum blood collection device using the same, the blood collection needles can be attached and detached from the holder very easily, and it does not take much time when handling a large number of needles, and it saves hands and fingers. It doesn't hurt. Furthermore, the blade surfaces of the blood collection needle can be easily aligned.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a vacuum blood collection device A according to an embodiment of the present invention, FIG. 2 is a front cross-sectional view of a holder and a blood collection needle according to an embodiment of the present invention, and FIG. -I line sectional view, Figure 4 is a sectional view of the main part with the blood collection needle attached to the holder, Figure 5 is a sectional view of the main part showing the operation of removing the blood collection needle from the holder, and Figure 6 is another embodiment. FIG. 7 is a cross-sectional view of the main parts of the vacuum blood sampler B related to the conventional vacuum blood sampler C.
FIG. 8 is a cutaway perspective view of the main parts showing the structure of a conventional holder. (Main symbols in the drawing), 1: blood collection needle, 2: holder, 3: blood collection tube, 11: puncture section, 12: introduction section,
13: Hub, 15: Engagement recess, 23: Fixing part, 4
2: Engagement tool, 45: Opening, 46: Large diameter opening,
47: Small diameter opening, 50, 64: Spring.

Claims (1)

[Scope of Claims] 1. A holder having a cylindrical fixing part for inserting and fixing a blood collection needle having an engaging recess into a hub, the fixing part being engaged with the engaging recess by a biasing force of a spring. and a blood collection needle holder to which an engagement tool for fixing the hub to the fixing part is attached. 2. The engagement tool is a plate member inserted into a guide hole diametrically penetrated through the fixing part of the holder,
Blood collection according to claim 1, wherein the plate member is bored with an opening consisting of a large diameter opening that allows the passage of a hub of a blood collection needle and a small diameter opening that engages only with the engagement recess. needle holder. 3. The blood collection needle holder according to claim 1, wherein the engagement tool is a pin attached so as to be able to protrude from the outer periphery of the fixing part of the holder toward the center. 4. Consisting of a blood collection needle having a substantially cylindrical hub, a holder having a cylindrical fixing part for inserting and fixing the hub of the blood collection needle, and a vacuum blood collection tube, the hub of the blood collection needle is provided with an engagement recess. . A vacuum blood sampler, wherein an engaging tool is attached to the fixed part of the holder to engage with the recessed part of the engaging part by a biasing force of a spring and fix the hub to the fixed part. 5. The engagement tool is a plate member inserted into a guide hole diametrically penetrated through the fixing part of the holder,
4. The vacuum according to claim 4, wherein the plate member has an opening formed by a large diameter opening that allows a hub of a blood collection needle to pass therethrough and a small diameter opening that engages only with the engagement recess. Blood sampler. 6. The vacuum blood sampler according to claim 4, wherein the engaging tool is a pin attached so as to protrude from the outer periphery of the fixing part of the holder toward the center. 7. The vacuum blood sampler according to claim 4, wherein the hub of the blood collecting needle is made of polypropylene, and the engaging recess is an annular groove formed on the outer periphery of the hub.