CN1460449A - Automatic quantitative blood-taking pen - Google Patents

Abstract

An automatic quantitative blood collection pen relates to a blood collection tool used in medical diagnosis and personal blood testing. The present invention consists of a blood lancing device and a blood collection device, and is characterized in that the blood collection device includes a blood collection sleeve, a negative pressure spring arranged in the blood collection sleeve, a piston clamp, a disposable blood collection needle tube and a piston matched with the needle tube . With the automatic quantitative blood collection pen provided by the invention, the functions of pricking and blood collection can be successfully completed at one time; since the volume of the blood collection needle tube is fixed, quantitative blood collection can be realized. The whole pricking and blood collection process can be automatically completed in a short time, so that the patient has no pain; the blood collection pen has a simple structure and is convenient to use.

Description

An automatic quantitative blood collection pen

technical field

The invention relates to a blood sampling tool used in medical diagnosis and personal blood testing, and belongs to the technical field of medical instruments.

Background technique

The blood collection pen is widely used in medical diagnosis and personal blood testing, and it is also an indispensable blood collection tool in household blood glucose measuring instruments and blood lipid measuring instruments. Its function is to puncture a small hole on the blood collection part of the tester, make the blood flow out slowly from the small hole, and then drip the blood into the assay chip for detection. Chinese utility model patent (application number: 99257948.1) discloses a blood collection pen with replaceable blood collection needles. The cavity of the blood collection pen is equipped with a projectile composed of elastic elements, and one end of the projectile is connected with a replaceable disposable blood collection needle. , when the projectile is pushed back, the locking protrusion on it is blocked by the locking hole on the casing, the blood collection needle is hidden in the blood collection pen, push the locking protrusion, and the blood collection needle is released from the blood collection pen holder under the action of the ejection spring. One end quickly extends out a short distance, pierces the skin, and then retracts into the blood collection pen to complete the blood collection function. In fact, this technology only completes the function of pricking blood, but it cannot draw blood samples to fixed containers or experimental chips. In addition, in order to avoid causing pain to the tester, the needle tip of the blood collection needle is made very thin, and the small hole pierced on the skin is small and not deep. If the skin of the blood collection site is thicker, such as a finger, the skin structure is relatively dense , the blood flow resistance is very large, in most cases the blood will not flow out automatically, but the blood can only be squeezed out by squeezing the skin, which will bring pain and inconvenience to the tester, even if the blood is squeezed The amount of blood cannot be determined after being squeezed out; on the other hand, in the process of squeezing blood, some body fluids are often squeezed into the blood, which will cause errors in the detection of blood sugar, blood lipids or other indicators. At present, the vast majority of blood collection processes still rely on doctors or nurses to press the required blood collection site, and then use the needle tip to pierce the skin and then pull it out. This method not only brings pain to the tester, but also has relatively high requirements for nurses. Acupuncture Depth cannot be strictly controlled.

Contents of the invention

The purpose of the present invention is to provide an automatic quantitative blood collection pen, which has the functions of a lancet and a blood collection device at the same time, and the whole pricking and blood collection process can be automatically completed in a short time, so that the patient has no pain; the whole blood collection pen The structure is simple and the use is convenient.

The purpose of the present invention is achieved through the following technical solutions: an automatic quantitative blood collection pen, containing a blood lancing device, the blood lancing device mainly includes an acupuncture pen holder, a blood lancing pen cap installed at the front end of the acupuncture pen holder, and arranged on the acupuncture pen holder A projectile body consisting of an ejection rod and an ejection spring, a replaceable disposable puncture needle installed on the head of the projectile body and a pre-pressed jacket arranged behind the acupuncture pen holder, is characterized in that it is installed at the other end of the blood collection pen There is a blood collection device, the blood collection device mainly includes a blood collection pen holder connected with the pre-pressed jacket, a negative pressure spring arranged in the blood collection sleeve, a piston clamp, a disposable blood collection needle tube and a piston matched with the needle tube; The front end of the negative pressure spring is connected with the pre-compressed jacket, the other end is fixed on the piston clamp, and the other end of the piston clamp is connected with the piston.

The blood collection pen according to the present invention is also characterized in that an L-shaped groove is provided on the wall of the blood collection pen holder, and a protrusion is provided on the piston clamp, and the protrusion is placed in the L-shaped groove. By pulling the protrusion, the piston fixture can be moved in the circumferential direction and the axial direction in the blood collection sleeve, and then the negative pressure spring in the blood collection pen holder can drive the piston to move, thereby realizing the blood collection function.

In order to conveniently replace, assemble and disassemble the disposable blood collection needle tube, the present invention is also characterized in that a T-shaped groove is provided on the piston fixture, and the piston is connected with the piston fixture through the T-shaped groove; There is a linear groove, which is 90 degrees to the L-shaped groove.

With the automatic quantitative blood collection pen provided by the invention, the functions of puncturing and blood collection can be successfully completed at one time; since the volume of the blood collection needle tube is fixed, quantitative blood collection can be realized. The whole pricking and blood collection process can be automatically completed in a short time, so that the patient has no pain; the blood collection pen has a simple structure and is convenient to use.

Description of drawings

Fig. 1 is a schematic diagram of the internal structure of the embodiment provided by the present invention.

FIG. 2 is a top view of FIG. 1 (schematic outline structure).

Fig. 3 is a front view of Fig. 1 (outline structure schematic diagram).

In the figure: 1-Lancet cap, 2-Puncture needle, 3-Lancet sleeve, 4-Ejection button, 5-Ejection rod, 6-Ejection spring, 7-Preload jacket, 8-Clasp ring, 9-Blood collection sleeve Barrel, 10-negative pressure spring, 11-protrusion, 12-piston, 13-blood collection needle, 14-T-shaped groove, 15-piston fixture, 16-L-shaped groove, 17-linear groove.

Detailed ways

The specific structure and implementation of the present invention will be further described below in conjunction with the accompanying drawings.

The automatic quantitative blood collection pen provided by the present invention is composed of two parts: a lancing device and a lancing device. The lancing pen cap 1 at the front end of the tube 3, the ejection rod 5 installed thereafter connected with the lancet 2, the ejection spring 6 mounted on the ejection rod, and the pre-compressed overcoat 7 arranged at the rear half of the lancing sleeve. The blood collection device mainly includes a blood collection sleeve 9, a negative pressure spring 10 arranged inside the blood collection sleeve, a piston clamp 15 connected to one end of the negative pressure spring 10, a piston 12 mounted on the other end of the piston clamp 15, and a piston 12. Replaceable disposable cylindrical blood collection needle tube 13. An L-shaped groove 16 is formed on the side wall of the blood collection sleeve 9, and a raised portion 11 is arranged on the piston fixture 15. The protrusion 11 is installed in the L-shaped groove 16, and the protrusion can be moved The piston jig moves along the L-shaped groove on the wall surface of the blood collection sleeve 9 . The piston fixture is provided with a T-shaped groove 14, and the piston 12 is fixed together with the piston fixture through the T-shaped groove. The inner end of the blood collection sleeve is a replaceable disposable cylindrical blood collection needle tube 13, and the piston 12 is matched with the blood collection needle tube; the end face of the blood collection needle tube slightly extends out of the rear sleeve. The side wall of the blood collection sleeve is provided with a linear groove 17 whose width should be slightly larger than the diameter of the blood collection needle tube for changing and loading and unloading the blood collection needle tube.

The blood lancing pen cap 1 at the front end of the blood lancing pen holder is in the shape of a circular platform to ensure the depth of acupuncture, and the cap is connected to the blood lancing pen holder 3 through threads. The second half of the blood lancing sleeve is covered with a pre-compression jacket 7, the ejection rod 5 is located in the pre-compression jacket, the needle 2 is installed on the front end of the ejection rod 5, the ejection spring 6 is sleeved on the rear half of the ejection rod 5, and the snap ring 8 is located at the end of the ejection rod 5, and plays the role of axial positioning and fixing the spring. There is an ejection button 4 on the side of the blood-piercing sleeve 3, and when the ejection button 4 was pressed, the ejection spring 6 would pop out automatically.

During use, first unscrew the cap 1 of the lancet pen, insert the lancet 2 into the round holder at the front end of the ejection rod 5, and screw the cap of the lancet pen. After installing the lancet, pull the pre-compression jacket 7 slightly backwards with your hands to pre-tighten the ejection spring 6, and then manually move the raised part 11 of the piston fixture to the rightmost end of the L-shaped groove 16 on the wall Then push the protrusion along the circumferential direction, so that the protrusion is blocked by the groove, and now the negative pressure spring 10 is stretched. At this time, the end of the piston 12 is positioned at the front end of the blood collection needle tube 13, and the preparatory work is completed. When taking blood, align the end face of the lancing pen cap 1 with the part to be punctured, press it with a little force, and then lightly press the ejection button 4, and the lancet 2 will automatically pop out and then return quickly. After the puncture needle punctures the finger, use the end of the blood collection sleeve in the second half of the blood collection pen to align with the punctured part, press it firmly, and use your fingers to move the raised part 11 of the piston fixture 15, and the piston fixture will Under the action of the negative pressure spring 10, it moves together with the piston 12. Due to the movement of the piston, a negative pressure will be formed in the blood collection needle tube 13. Under the action of the negative pressure, the blood will flow into the blood collection needle tube from the punctured hole, thereby completing the blood collection. process. Finally, the disposable syringe filled with blood is taken out through the linear groove 17 on the side wall of the blood collection pen holder.

Claims (4)

1. automatic ration blood collecting pen, contain spinosity blood device, this thorn blood device mainly comprises acupuncture pen container (3), be installed in the thorn blood cap for brush (1) of acupuncture pen container front end, be arranged on the projectile of forming by piston ejector ram, ejector piston and ejection-spring in the acupuncture pen container, the precompressed overcoat (7) that is installed in a removable disposable pricker (2) of this projectile head and is arranged on acupuncture pen container back, it is characterized in that: the other end at blood collecting pen is equipped with hemostix, this hemostix mainly comprises the blood sampling pen container (9) that links to each other with described precompressed overcoat, be arranged on the negative pressure spring (10) in the blood sampling sleeve, piston anchor clamps (15), disposable blood taking needle pipe and the piston (12) that matches with needle tubing; The front end of described negative pressure spring links to each other with the precompressed overcoat, and its other end is fixed on the piston anchor clamps, and the other end of piston anchor clamps is connected with described piston.

2. according to the described a kind of automatic ration blood collecting pen of claim 1, it is characterized in that: the wall of described blood sampling pen container is provided with a L type groove (16), and described piston anchor clamps are provided with a projection (11), and this projection is placed in the L type groove.

3. according to claim 1 or 2 described a kind of automatic ration blood collecting pens, it is characterized in that: described piston anchor clamps are provided with T type groove (14), and piston is connected with the piston anchor clamps by T type groove.

4. according to claim 1 or 2 described a kind of automatic ration blood collecting pens, it is characterized in that: be provided with the straight-line groove (17) that is used for loading and unloading the blood sampling needle tubing on the telescopic sidewall of blood sampling, this groove and L type groove are mutually 90 degree.

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