JPH01185245A - Blood collecting piercing tool - Google Patents

Abstract

PURPOSE:To reduce a pain in the time of piercing further to ensure a sufficient collecting amount of blood by the shallow piercing by integrally molding a resilient member and a pressing part and providing an end face, sharpened to a degree giving no injury to the skin, in one point end of a casing. CONSTITUTION:A spring holder 5 is constituted of a pressing part 5a containing a pressing surface pressed by an operator, spring 5b and a recessed part 5c for fitting a protruding part 2b of a hub 2 in a piercing needle part 100, and these parts 5a, 5c and spring 5b are integrally molded. A pierced part of finger or the like is adapted to an opening part 3c, formed in a protector 3, by the operator, and a pressing surface of the pressing part 5a, formed in the spring holder 5 of a piercing tool part 200, is pressed. As the result, the hub 2 is pressed in a direction of arrow head 60, and a canal 1, held to the hub 2, is urged in a piercing direction and protruding from the protector 3. Here by pressing a pierced part by a fine tubular point end of a casing, the pierced part is placed in a congestion condition, consequently a sufficient amount of blood collection can be obtained when blood is collected.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to blood sampling, particularly to a blood sampling puncturing device for sampling a small amount of blood from a fingertip for measurement of sugar content and the like.

[Prior Art] For example, when collecting a small amount of blood from a fingertip to measure blood sugar level, etc., a blood sampling puncture device equipped with a needle-like or small scalpel-like lancet for penetrating or incising the skin is usually used. equipment is used. Blood is collected by pricking the skin of the person being punctured with a lancet, which is a blood collection puncture device, and making an incision.
After the incision is made, the lance is removed from the incision, and the blood flowing out from the incision is collected onto a test paper, a pipette, or the like.

[Problems to be Solved by the Invention] It is desirable that a puncturing device for blood collection not cause fear and cause little pain when puncturing. However, in the actual device, the lancet is visible, giving the person being punctured a sense of fear, and there are problems such as contamination due to carelessness during collection. In order to solve these problems, various proposals have been made for improving devices, such as devices that store the lancet inside the casing, and devices that use multiple springs to store the lancet inside the casing after puncturing. It has been made. However, the complicated mechanism increases the size of the device, and the spring or the like generates a loud firing sound during the puncturing operation, which poses the problem of giving a sense of fear to the person being punctured. Additionally, the puncture had to be deep to ensure a constant amount of blood sampled.

For example, when blood is drawn from a fingertip, the location of the capillaries in the skin and the free endings of the nerves that feel pain are at almost the same depth, causing great pain to the person being punctured. Furthermore, since the puncture was performed deeply, there was a problem in that the blood did not stop easily after the puncture and the pain continued for a long time.

It is an object of the present invention to provide a blood sampling puncturing device that can eliminate such drawbacks of the prior art, reduce pain during puncturing, and secure a sufficient amount of blood with shallow puncturing. do.

[Means for Solving the Problems] According to the present invention, a casing having an opening at one end, a skin puncture needle housed inside the casing, and holding the puncture needle in a predetermined position, and a holding part that is slidable between the holding part and the casing, a pressing part exposed at the other end of the casing, and arranged between the holding part and the pressing part, and responsive to the pressing operation of the pressing part in the direction of the tip of the casing. In the blood sampling puncturing device, the casing includes an elastic member that transmits a motion to the holding part and causes the tip of the puncturing needle to protrude from the opening.
One tip has an end surface that is sharp enough not to damage the skin when the tip is pressed against the skin to cause congestion.

According to one feature of the present invention, the elastic member and the pressing portion are integrally molded.

According to another feature of the present invention, the casing is separated into a first casing including a holding portion and a second casing including an integrally molded elastic member and a pressing portion, which are fitted together during a puncturing operation. and use it.

According to still another feature of the present invention, a holding part, an elastic member,
and a pressing part are integrally molded.

According to still another feature of the present invention, the sharp end face of the casing tip has an opening with an inner diameter of about 0.6 mm to 3.5 mm, and a wall thickness at the end face of about 0.1 mm to 0.6 mm.
It is about 5 mm.

[Function] According to the present invention, one end of the casing of the blood sampling puncture device is formed into a thin cylindrical shape. When performing a puncturing operation using this puncturing device for blood collection, first, the tip of the casing formed in a thin cylindrical shape is applied to the puncture site to irritate the skin and further cause congestion at the puncture site. Thereafter, a puncturing operation is performed using a puncturing needle housed within the casing.

[Example] Next, an example of the blood sampling puncture device according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a sectional view of an embodiment of a blood sampling puncture device according to the present invention. As shown in FIG. 3, the puncturing device for blood sampling in this embodiment has a puncturing needle portion 100 and a puncturing tool portion 200 that are separable. When a wooden device is used, the puncturing needle portion 100 is set in the puncture device section 200 and used in the state shown in FIG.

The puncture needle section 100 includes a cannula 1, a slidable hub 2 that holds the cannula 1 in a predetermined position, and a protector 3 that houses the cannula 1 and the hub 2. As shown in the figure, the protector 3 has an opening 3 on one side in the longitudinal direction where the part to be punctured, such as a finger, is placed.
C is formed, and the other end in the longitudinal direction is formed to a size that matches the inner diameter of the case 4 of the puncture tool section 200 so that it will come into close contact with the puncture tool section 200 when engaged with the puncture tool section 200.

The tip of the protector 3 in which the opening 3C is formed is formed into a pipe shape, and its diameter is made small within a range that allows the cannula 1 to protrude and be stored, and also to compress the skin at the puncture site. The parts are sharp enough not to cause scratches on the skin. Specifically, the aperture a of the tip of the protector 3 is desirably about 0.6≦a≦35;
More preferably, about 1≦a≦2.5. The values O and Bmm are due to the current limit of approximately 0.5 mm in manufacturing cannula 1, and the value 3.5 mm is based on the level of congestion and pain required to obtain the effects of the present invention, which will be described later. This is the critical value at which congestion is small and pain is large. In addition, the wall thickness of the protector 3, which is the part that presses the skin at the puncture site, should be as thin as possible, but it is preferable that the wall thickness of the protector 3 be about 0.1 to 0.5 mm so as not to damage the skin at the tip surface. The thickness is approximately 0.3 mm, which is the current manufacturing limit. This has a pipe-like, sharp tip that is applied to the puncture site, which stimulates the skin and softens the sensation of puncturing. Furthermore, by applying the sharply formed tip to the puncture site, stasis is generated at the puncture site, and when the puncture operation is completed and the blood sampling puncture device is removed from the puncture site, the stasis is released. This has the effect of ensuring a sufficient amount of blood to be collected.

The hub 2 is installed inside the protector 3 and is connected to the puncture device part 2.
00, the protrusion 3a formed on the inner side surface of the protector 3 and the recess 2a formed in the hub 2 are engaged, and the hub 2 is locked to prevent it from sliding freely. It has become. One side in the longitudinal direction of the hub 2, that is, the opening 3C side of the protector 3 holds the cannula 1 in a predetermined position, and the other side is formed with a convex portion 2b for fitting with the puncture device portion 200. ing.

The puncture device section 200 is configured to use the puncture needle section 100 when performing a puncture operation.
By fitting with the hub 2 of the spring holder 5, the cannula 1 held by the hub 2 is projected from the protector 3 and is housed in the protector 3. During non-puncture operation, the spring 5b of the spring holder 5 is compressed. The spacer 6 is configured to push up the locking part 4d to start the puncture when performing a puncturing operation, and the case 4 houses the spring holder 5 and the spacer 6. ing.

Case 4, as its side view is shown in FIG.
It has a cylindrical shape, and a locking portion 4d having an elastic force toward the inside of the cylinder is formed in a part thereof.

The spring holter 5 includes a pressing part 5a including a pressing surface pressed by an operator, a spring 5b, and a puncture needle part 100.
It is composed of four dowel parts 5C that fit into the convex part 2b of the hub 2, and these parts are made of integrally molded plastic. Therefore, the spring holster 5 has excellent durability and can provide mild operation to reduce pain during puncturing.

Note that this spring holder 5 includes a protrusion 4b formed on the case 4, a medical origin portion 5e formed on the spring holder 5, a flange 4C formed on the case 4, and a flange 5f on the pressing surface 5a of the spring holder 5. This prevents the case from deviating from case 4.

Further, the cannula 1 in this embodiment is subjected to silicone treatment. Silicone is known as a lubricant and reduces the force required to puncture the cannula 1 into the skin, making it less painful for the operator.

Here, the puncture needle part 100 is actually constructed using FIGS. 1 to 6.
The operation of each part when performing a puncturing operation using the puncturing tool section 200 will be explained.

First, the spring holder 5 of the puncture device section 200 is pushed in the direction of the arrow 50 by the operator. By being pushed in the direction of the arrow 50, the locking portion 4d formed on the case 4 becomes dirty and the protrusion portion 5d formed on the spring holter 5.
are engaged, and the spring 5b is held in a compressed state (FIG. 2). It goes without saying that the spring 5b is held in a repulsive state in the direction of the arrow 80 at this time.

Next, the operator engages the convex part 2b formed on the hub 2 of the puncture needle part +00 with the concave part 5c formed in the puncture tool part 200, and pushes it in the direction of the arrow 50 (see FIGS. Figure 4). When the puncture needle part 100 is pushed in the direction of the arrow 50, the hub 2 is in a state where the protrusion 3a formed on the inner side surface of the protector 3 of the puncture needle part 100 and the recess 2a formed in the hub 2 are engaged, that is, The lock state described above is released and sliding becomes possible. At this time, the puncture needle part +
The flange 3b formed on the protector 3 of 00 and the outer periphery of the recess 4a of the case 4 formed on the puncture tool section 200 engage with each other, whereby the puncture needle section 100 and the puncture tool section 200 are separated.
are fitted, and the setting is completed (Fig. 1).

Next, the opening 3 formed in the protector 3 by the operator
A part to be punctured, such as a finger, is applied to c, and the pressing surface of the pressing part 5a formed on the spring holder 5 of the puncturing tool section 200 is pressed. When the pressing surface is pressed by the operator, the pressing surface portion 5a pushes the spacer 6 in the direction of the arrow 60. The spacer 6 engages with a locking portion 4d formed on the case 4, and is further pushed to spread the locking portion 4d in the direction of the arrow 70.

As the locking portion 4d is expanded by the spacer 6, the engagement between the locking portion 4d and the protrusion 5d formed on the spring holder 5 shown in FIG. 2 is released. As a result, the spring 5b, which was held in a compressed state due to the engagement between the locking part 4d and the protrusion 5d, rebounds.
Together with the spring holster 5, the hub 2 is pushed in the direction of the arrow 60, urging the cannula 1 held by the hub 2 in the puncturing direction and causing it to protrude from the protector 3. At this time, cannula 1
In this embodiment, the length C of the projection from the protector 3 is approximately 1.5 mm. This length C is adjusted according to the inner shape of the protector 3, and is shown in FIGS. 5 and 6.
As shown in the figure, the distance A that the hub 2 can move is:
The sum of the distance B from the opening 3c to the tip of the cannula 1 when the cannula 1 or the protector 3 is stored, and the length C that the cannula 1 protrudes from the protector 3, that is, A=B
+C (approximately 1.5 mm).

By the above-described operation, the cannula 1 protrudes from the protector 3 and punctures the skin at the part where blood is to be collected (FIG. 6).

The cannula 1 is stored in the protector 3 in the puncture device part 2.
When removing the puncture needle part 100 from the spring holder 5
It is stored by being returned by the fitting force of the 5c part and the 2b part.

In this embodiment, since the blood sampling puncture device is separated into the puncture needle section 100 and the puncture tool section 200, the puncture device section 200
can be used repeatedly. Therefore, it is possible to obtain merits in terms of cost as well.

FIG. 7 shows another example of a blood sampling puncture device to which the present invention is applied.

This example is not a separate type like the apparatus of the embodiment shown in FIGS. 1 to 6 (hereinafter referred to as the first apparatus), but the puncture needle part 100 and the puncture tool part of the first apparatus. 200 shows a type of blood sampling puncture device that is integrated with 200. This blood sampling puncture device includes a hub 500a that holds the cannula 1;
The spring 500b and the pressing part 500C are integrally molded, and as shown in FIG. 7, the integrally molded spring holder 500 has an opening 300c formed on one longitudinal side thereof to which a part to be punctured, such as a finger, is applied. It is housed in a protected protector 300. Spring Holter 500 is
Protrusion 300 formed on the inner side surface of protector 300
a and the protrusion 500 formed on the spring holder 500
d is engaged with the locking portion 300 of the protector 300.
d so that it does not slide freely.

Note that the protector 30 in which the opening 300C is formed
The tip of the cannula 0 is formed into a pipe shape like the first device, and its diameter is made small enough to allow the protrusion and storage of the cannula 1, and the part that presses the skin at the puncture site does not cause any damage to the skin. It is sharply formed to the extent that no scratches occur.

When performing a puncturing operation using this blood sampling puncturing device, the operations of the main parts and their effects are similar to those of the first device.

According to this embodiment, the puncture needle part 10 in the first device
0 and the puncture device part 200 are integrated, the blood sampling puncture device itself can be made smaller and lighter, and the device can be easily carried.

Note that the instruments in the above examples are each packaged to maintain a sterile state.

Furthermore, the present invention can be applied to other conventionally used puncturing devices for blood collection.

[Effects of the Invention] According to the present invention, one tip of the casing of the blood sampling puncturing device is formed into a thin cylindrical shape, and when puncturing, the puncture is first performed with the tip of the casing formed in the thin cylindrical shape. Since the target area is stimulated and the lancet is then used to puncture, the pain at the time of puncture can be reduced. Furthermore, by pressing the puncture part with the thin cylindrical tip of the casing, the puncture part becomes depressed, so that a sufficient amount of blood can be collected during blood collection. Therefore, there is no need to make deep punctures, a sufficient amount of blood can be collected with shallow punctures, and pain at the time of puncturing can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the blood sampling puncture device according to the present invention; FIGS. 2 to 6 are sectional views showing the operation of the blood sampling puncturing device shown in FIG. 1; FIG. 7 is a sectional view showing another embodiment of the blood sampling puncture device according to the present invention. FIG. 8 is a side view of the case of the blood sampling puncture device shown in FIG. 1. Explanation of symbols of important parts 1, Cannula 2, Hub 3.300. , ,Protector 4, ,Case 5.500. , , Spring holder 6 , , Spacer 100 , , Puncture needle part 200 , , Puncture tool part

Claims (1)

[Claims] 1. A casing having an opening at one end, a skin puncture needle housed inside the casing, and a skin puncture needle that holds the puncture needle in a predetermined position and that a holding part that is slidable between; a pressing part exposed at the other end of the casing; and a pressing part disposed between the holding part and the pressing part and responsive to a pressing operation of the pressing part toward the tip of the casing. and an elastic member that transmits the movement to the holding part to cause the tip of the puncture needle to protrude from the opening, wherein the casing has one tip that presses the tip against the skin. A puncturing device for blood sampling characterized by having an end surface that is sharp enough not to injure the skin when the skin is engorged with blood. 2. The blood sampling puncture device according to claim 1, wherein the elastic member and the pressing portion are integrally molded. 3. The casing is separated into a first casing including the holding portion and a second casing including the elastic member and the pressing portion integrally molded, and the casing is used by fitting during a puncturing operation. The second claim characterized in
Puncturing device for blood collection as described in Section 1. 4. Claim 1, wherein the holding section, the elastic member, and the pressing section are integrally molded.
Puncturing device for blood collection as described in Section 1. 5. The sharp end face of the casing tip has an opening with an inner diameter of about 0.6 mm to 3.5 mm, and the wall thickness at the end face is about 0.1 mm to 0.5 mm. The puncturing device for blood sampling according to item 1.