A blood collection device and method of using the same

Abstract

The present invention provides a blood collection device, wherein a blood collection needle is arranged at the first end of a needle holder, and the second end of the needle holder contacts a piston via an elastic device. The needle holder is provided with a stop arm. When the needle holder moves along the first direction of the launch tube, the stop arm and the blocking member in the launch tube change from the first state to the second state, thereby controlling the blood collection needle to be excited along the first direction. Under the control of the elastic device, the blood collection needle moves a preset distance in the second direction, so that the blood collection needle cannot contact the skin again after a single excitation. The present invention also provides a method for using the blood collection device. The present invention adopts a technology that makes the blood collection needle ineffective after a single excitation, thereby avoiding the problem of cross infection caused by multiple punctures.

Description

Technical Field

[0001] The present invention relates to the technical field of medical and health clinical testing, and in particular to a peripheral blood collection device for operation by non-professionals and a method for using the device. Background Art

[0002] In modern medical testing, collecting blood samples is a crucial tool for diagnosing diseases. However, traditional blood collection methods present numerous inconveniences, particularly in the home setting. With the development of society and the increasing demand for medical care, blood sample collection technology in the home setting has become increasingly important. The following is an analysis of existing blood collection (or sampling) technologies and an outlook on novel blood collection devices.

[0003] The limitations of existing blood collection technologies include: The inconvenience of blood collection in hospitals: As traditional blood collection sites, hospitals often face problems such as long queues and complex environments. It is especially difficult for the elderly, children, and patients with limited mobility to go to the hospital for blood collection. Dependence on professional technicians: The collection of blood samples usually requires professional medical staff, which not only limits the location of blood collection, but also increases the burden on medical resources. Risk of cross-infection: Traditional blood collection technology may have the risk of cross-infection, especially when the same blood collection equipment is used multiple times. Technical limitations: Although the existing multi-needle puncture collection technology and vacuum blood collection tube technology have solved the problem of blood collection to a certain extent, there are still technical difficulties such as complex operation and unstable negative pressure. Summary of the Invention

[0004] The present invention aims to provide a blood collection device that utilizes a single-shot, post-activation lancet deactivation technology to prevent cross-infection caused by multiple punctures. A piston-type vacuum negative pressure source provides continuous and multiple-time negative pressure, with a double sealing ring for more reliable sealing and smoother piston movement. Furthermore, microfluidic technology is employed to increase the blood flow rate and reduce blood adhesion within the collector, thereby reducing blood clot formation during the collection process and improving blood sample quality. The device is simple to operate, lightweight, and includes a safety lock to prevent accidental activation. It is easy to use and requires only counterclockwise rotation to a certain angle, then adhered to the arm or a location with more skin and muscle mass, and pressed to collect blood.

[0005] A blood collection device, which includes a sealing cover, a bottom cover, a top cover, a needle holder, a piston, a blood collection needle, and a launch tube. The sealing cover can be selectively connected to a collection tube, the bottom cover is accommodated in the receiving space of the sealing cover, and the launch tube is movably arranged in the receiving cavity of the sealing cover to provide a guide and rebound device for the launch tube; the blood collection needle is arranged at the first end of the needle holder, and the second end of the needle holder is in contact with the piston through an elastic device. The needle holder is provided with a stop arm. When the needle holder moves along the first direction of the launch tube, the stop arm and the blocking member in the launch tube change from the first state to the second state, controlling the blood collection needle to be excited along the first direction, and under the control of the elastic device, the blood collection needle moves a preset distance along the second direction, so that the blood collection needle cannot contact the skin again after being excited once.

[0006] Preferably, a spiral shrapnel is provided at the bottom of the bottom cover to provide power for the rebound of the launching tube.

[0007] Preferably, the needle holder is further provided with a guide plate, and the guide plate slides in the guide groove of the launching tube.

[0008] Preferably, the upper portion of the needle holder is provided with a limiting seat for installing an elastic device, and the lower portion is provided with a lock hole for connecting a fixing flange, and the fixing flange fixes the blood collection needle. The elastic device is a first spring.

[0009] Preferably, the elastic device is located at the central axis of the blood collection device and is arranged between the piston and the needle holder.

[0010] Preferably, a one-way valve cover is provided on the piston to provide one-way airflow control for forming a vacuum chamber by the piston.

[0011] Preferably, the sealing ring is arranged in the piston sealing ring groove to form a sealing cavity between the piston and the top cover;

[0012] Preferably, the second spring is arranged between the piston and the bottom cover.

[0013] Preferably, the handle is configured to provide an anti-accidental trigger lock and an unlock trigger for the blood collection device.

[0014] A method for using a blood collection device comprises placing the A side of the sampling device against the skin, pressing the handle from position B to the top of the top cover; the needle holder moves in the launching tube along a first direction, the stop arm and the blocking member in the launching tube change from a first state to a second state, controlling the lancet to be excited along the first direction, and under the control of the elastic device, the lancet moves a preset distance in the second direction, so that the lancet cannot contact the skin again after being excited once.

[0015] Preferably, the specific process of the first state changing to the second state is as follows:

[0016] Handle downward movement stage 1: The first spring is stronger than the spiral spring piece of the bottom cover, and the first spring is compressed. As the piston continues to move downward, the spiral spring piece is compressed, and the second spring is compressed. The inclined surface clamping member D of the needle holder stop arm abuts against the blocking member E of the firing tube. At this time, the pushing member C of the piston has not yet contacted the inclined surface clamping member D of the needle holder stop arm, and the one-way valve cover exhausts gas.

[0017] Handle downward movement stage 2: The first spring and the second spring continue to be compressed, and the launch tube moves downward accordingly until the center of the bottom of the launch tube extends out of the sealing cover A and contacts the skin. The launch tube is abutted against the sealing cover and stops moving. The pushing member C of the piston contacts the inclined clamping member D of the needle holder stop arm. At this time, the state is the first state.

[0018] Handle down stage 3: The first spring and the second spring continue to be compressed; the piston pushing member C moves relative to the inclined surface of the inclined surface clamping member D of the needle holder stop arm, squeezing the inclined surface clamping member D of the needle holder stop arm inward along the inclined surface;

[0019] Handle down stage 4: squeeze the inclined clamp D of the needle holder stop arm inward out of the buckle position until the pushing part C of the piston contacts the blocking part E of the launch tube, and the blood collection needle is activated. At this time, the state is the second state. The blood collection needle and the needle holder are pushed out of the launch tube under the action of the first spring. The blood collection needle contacts the skin, completes the puncture, and is quickly pulled back by the first spring. Due to the presence of the blocking part E of the launch tube, the upper surface of the inclined clamp D of the needle holder abuts against the lower surface of the blocking part E of the launch tube, making it impossible for the blood collection needle to be reset for a second puncture; the blood collection needle and the needle holder are hidden together in the launch tube, so that the blood collection needle cannot be punctured a second time after being activated once, avoiding the problem of cross infection caused by multiple punctures.

[0020] When the handle is released, the piston returns to the initial position B under the action of the second spring, and negative pressure is formed due to the space sealing; the launching tube returns to its original position under the action of the spiral spring sheet of the bottom cover.

[0021] Under the action of negative pressure, a small amount of blood will continue to flow out of the skin punctured by the needle. After the blood is collected, it flows into the collection tube along the guide groove of the sealing cover under the action of gravity.

[0022] Beneficial effects:

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. Minimally invasive and non-invasive technology in which multiple capillary needles instantly puncture the skin to a fixed depth and then withdraw. The circular needle can better form a blood flow channel, speed up blood collection, reduce residual blood, and reduce the user's psychological anxiety;

[0025] 2. The blood collection needle is invalid after one-time stimulation to avoid cross infection caused by multiple punctures;

[0026] 3. Microfluidic technology is used to increase the flow rate of blood collection and reduce the adhesion of blood in the collector, reduce blood clots during the collection process, and improve the quality of blood samples.

[0027] 4. Simple operation, lightweight, with a safety lock to prevent accidental triggering. Easy to use, rotate counterclockwise to a certain angle, then stick it on the arm or a place with more skin and muscles, and press to collect blood;

[0028] 5. Piston type vacuum negative pressure source, continuously provides negative pressure, can provide negative pressure multiple times, double sealing ring seal is more reliable, piston movement is smoother;

[0029] 6. The connection method between the blood collection needle and the needle holder has good adaptability and can stick to the inclined surface of the skin during puncture, ensuring the puncture effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a side view of the blood collection device of the present invention;

[0031] Figure 2 is a rear view of the blood collection device of the present invention;

[0032] Figure 3 Schematic diagram of the explosion of the external components of the blood collection device of the present invention;

[0033] Figure 4 is a cross-sectional view of a side view of the blood collection device of the present invention;

[0034] Figure 5 is a cross-sectional view of a rear view of the blood collection device of the present invention;

[0035] Figure 6-7 3D images of the sealing cover of the present invention at different angles;

[0036] Figure 8-9 3D images of the bottom cover of the blood collection device of the present invention at different angles;

[0037] Figure 10 A three-dimensional diagram of the top cover of the blood collection device of the present invention;

[0038] Figure 11-12 Schematic diagram of the explosion of the internal components of the blood collection device of the present invention;

[0039] Figure 13 Schematic diagram of the explosion of the needle holder and the launching tube of the blood collection device of the present invention;

[0040] Figure 14 Schematic diagram of an explosion of the handle and piston of the blood collection device of the present invention;

[0041] Figure 15 Detailed structural diagram of the handle and piston of the blood collection device of the present invention;

[0042] Figure 16 Schematic diagram of the internal structure of the blood collection device of the present invention;

[0043] Figure 17 is a bottom view of the blood collection device of the present invention;

[0044] Figure 18 A detailed structural diagram of the sealing cover of the blood collection device of the present invention;

[0045] Figure 19 A detailed structural diagram of the piston, first spring, needle holder, and firing tube of the blood collection device of the present invention;

[0046] Figure 20 A detailed structural diagram of the piston and top cover of the blood collection device of the present invention;

[0047] Figure 21 This is a cross-sectional detailed structural diagram of the blood collection device of the present invention. DETAILED DESCRIPTION

[0048] According to the attached Figure 1-21 As shown, the present invention provides a blood collection device, including a sealing cover 01, a bottom cover 02, a top cover 03, a needle holder 04, a piston 06, a blood collection needle 10, and a launch tube 11: wherein,

[0049] The sealing cover 01 can be selectively connected to the collection tube 011. The sealing cover 01 is used to fit the skin to form a sealing surface with the skin under negative pressure, so that the blood can flow into the collection tube 011 through the microchannel after being sucked out.

[0050] The sealing cover 01 includes a receiving space, and the bottom cover 02 is accommodated in the receiving space of the sealing cover 01. The bottom cover 02 can serve as a skeleton to support the sealing cover 01 on the periphery. The bottom cover 02 has a accommodating cavity with openings at both ends and provides a guide and rebound device for the internal launching tube 11; the blood collection needle 10 can be movably passed back and forth through the accommodating cavity of the bottom cover 02, and spiral spring pieces 021 are provided on both sides of the circumference direction of the bottom of the accommodating cavity of the bottom cover 02. The spiral spring pieces 021 are in contact with the lower part of the launching tube 11 to provide power for the rebound of the launching tube 11; four guide grooves are provided in the launching tube 11, two of which are through-connected, and the other two guide grooves are provided with blocking members; the needle holder 04 is provided inside the launching tube 11, preferably with two guide pieces and two stop arms, the guide pieces slide up and down in the through guide grooves of the launching tube 11, and the stop arms are restricted in sliding in the guide grooves of the launching tube 11 with blocking members, and the stop arms and the blocking member E of the launching tube 11 ensure that the blood collection needle 10 cannot contact the skin again after being fired once.

[0051] The top cover 03 is connected to the bottom cover 02 as a whole through interference fit, fasteners, etc., and becomes the outer shell support of the blood collection device; the piston 06 passes through the upper hole of the top cover 03 to provide negative pressure for blood outflow.

[0052] Preferably, the sealing cover 01 may be made of soft rubber.

[0053] Preferably, see Figure 18 The lip-shaped sealing ring 013 of the sealing cover 01 protrudes from the adhesive surface 014; in the adsorption state, it will be slightly pressed into the skin to form a unique seal, and the inclined surface 012 will be flush with the skin surface to form a step-free flow channel, which can reduce the amount of blood residue and the time the blood stays in the collector, so that the blood cannot form clots on the flow channel to hinder the detection of sample suction.

[0054] Preferably, see Figure 4 、 Figure 5 、 Figure 11-13 The needle holder 04 is provided with two guide plates and two stop arms, the upper part is provided with a limit seat 041 for installing the first spring 05, and the lower part is provided with a lock hole 042 connected to the fixing flange 101; the fixing flange 101 fixes the blood collection needle 10.

[0055] Preferably, the blood collection needle 10 is a ring-shaped needle.

[0056] For further information, see Figure 4 、 Figure 5 、 Figure 11 and Figure 12, the blood collection device also includes internal components: a first spring 05, a one-way valve cover 07, a sealing ring 08, a second spring 09, and a handle 12;

[0057] The blood collection needle 10, the fixing flange 101, the needle holder 04, the first spring 05, and the piston 06 are connected in sequence;

[0058] The piston 06 is provided with a mounting portion relative to the limiting seat 041 of the needle holder 04.

[0059] The first spring 05 is located at the central axis of the blood collection device and is arranged between the mounting portion of the piston 06 and the limiting seat 041 of the needle holder 04 to store force and provide power for exciting the blood collection needle 10.

[0060] The one-way valve cover 07 is provided on the piston 06 to provide one-way airflow control for forming a vacuum chamber for the piston 06 .

[0061] See also Figure 20 , the sealing ring 08 is arranged in the piston sealing ring groove 063 to form a sealing cavity between the piston 06 and the top cover 03;

[0062] Preferably, the sealing ring 08 has one or more raised sealing rings 081, which function to maintain contact while reducing friction, forming a sealing ring cavity 082 between the sealing ring and the top cover 03, which is more conducive to sealing; the sealing ring cavity 082 forms a pressurized air sealing area, which makes the sealing better, and contains a trace amount of medical silicone oil inside, which makes the sealing better and the pressing smoother.

[0063] The sealing ring 08 is installed on the piston 06 to form an internal seal with the top cover 03, the sealing cover 01 and the top cover 03 form a lower seal, and the outlet position of the sealing cover 01 forms a seal together with the collection tube 011; the hole on the piston 06 and the one-way valve cover 07 form a one-way valve.

[0064] Preferably, the piston 06 includes: a clamping member 061, a piston rod 062, and a piston sealing ring groove 063; the clamping member 061 is arranged at the top end of the piston rod 062; the piston rod 062 passes through the middle hole of the top cover 03; the clamping member 061, the piston rod 062, and the piston sealing ring groove 063 respectively form a multi-position guide with the top cover 03, reducing the deflection of the piston 06 and making the movement of the piston 06 more reliable and smooth; the piston 06 provides power and structural support for the excitation and vacuum needs of the blood collection needle 10.

[0065] The second spring 09 is disposed between the piston 06 and the bottom cover 02 to provide continuous power for forming a vacuum degree in the vacuum chamber.

[0066] Preferably, see Figure 20 The handle 12 is configured to provide an anti-accidental trigger lock and unlock trigger for the blood collection device, and can be the only part of the sampling device that requires operation; the handle 12 includes: a recessed positioning hole 121, a limiting rib 122 and a locking tongue 123; the recessed positioning hole 121 is provided at the bottom of the handle 12, preferably two in number, and cooperates with the clamp 061 on the piston 06 for opening and unlocking positioning; the limiting rib 122 cooperates with the piston rod 062 to form a locking limit; the locking tongue 123 blocks the position 031 of the top cover 03 through the hole 064 to lock the blood collection device; after the locking tongue 123 retracts, the hole 064 and the position 031 form a channel for up and down movement, the blood collection device protection lock is opened, and it can be used normally.

[0067] When in use, rotate the handle 12 counterclockwise to a certain angle, and when you hear a "click" sound, the card 061 enters the recessed positioning hole 121; Figure 21 direction, tear off the protective film 13 of the adhesive surface 014, put the A surface close to the skin, press the handle 12 from position B to the top of the top cover, and the piston 06 moves in the direction relative to the skin, which is the first direction.

[0068] Stage 1 of downward movement of the handle 12: The first spring 05 is stronger than the spiral spring piece 021 of the bottom cover 02. The first spring 05 is compressed. As the piston 06 continues to move downward, the spiral spring piece 021 is compressed, and the second spring 09 is compressed. The inclined clamping member D of the stop arm of the needle holder 04 abuts against the blocking member E of the launching tube 11. At this time, the pushing member C of the piston 06 has not yet contacted the inclined clamping member D of the stop arm of the needle holder 04, and the one-way valve cover 07 exhausts gas.

[0069] Stage 2 of downward movement of the handle 12: the first spring 05 and the second spring 09 continue to be compressed, and the launching tube 11 moves downward accordingly, until the bottom center of the launching tube 11 extends out of the A surface of the sealing cover 01 and contacts the skin. The launching tube 11 is abutted against the sealing cover 01 and no longer moves. At this time, the pushing member C of the piston 06 contacts the inclined clamping member D of the stop arm of the needle holder 04, and the state is now the first state;

[0070] Stage 3 of the downward movement of the handle 12: the first spring 05 and the second spring 09 continue to be compressed; the pushing member C of the piston 6 moves relative to the inclined surface of the inclined surface clamping member D of the stopper arm of the needle holder 04, squeezing the inclined surface clamping member D of the stopper arm of the needle holder 04 inward along the inclined surface;

[0071] Stage 4 of the downward movement of the handle 12: The inclined clamp D of the stopper arm of the needle holder 04 is squeezed inward to a buckle position until the pushing member C of the piston 06 contacts the blocking member E of the launch tube 11. The blood collection needle 10 is activated and the state is now the second state. The blood collection needle 10 and the needle holder 04 are pushed out of the launch tube 11 under the action of the first spring 05. The blood collection needle 10 contacts the skin, completes the puncture, and is quickly pulled back by the first spring 05. Due to the presence of the blocking member E of the launch tube 11, the upper surface of the inclined clamp D of the needle holder 04 abuts the lower surface of the blocking member E of the launch tube 11, making it impossible for the blood collection needle 10 to return to its original position for a second puncture. At this time, the blood collection needle 10 and the needle holder 04 are hidden together in the launch tube 11, so that the blood collection needle cannot be punctured a second time after being activated once, avoiding the problem of cross infection caused by multiple punctures.

[0072] When the handle 12 is released, the piston 06 returns to the initial position B under the action of the second spring 09, and negative pressure is formed due to the space sealing; the launch tube 11 returns to its original position under the action of the spiral spring piece 21 of the bottom cover 02;

[0073] At the same time, under the action of negative pressure, a small amount of blood will continue to flow out from the skin pierced by the needle. After the blood is collected, it flows into the collection tube 011 along the guide groove 015 of the sealing cover 01 under the action of gravity.

[0074] The blood collection needle forms a wound. After the blood sample seeps out, the blood will remain in place due to its small amount. When the blood reaches a certain volume, it will adsorb together. Due to the difference in hydrophilicity, the blood will flow along the wound and stay in the sealing cover 01.

[0075] The A surface of the sealing cover 01 is tightly adhered to the skin, and the lip-shaped sealing ring 013 boss is tightly attached to the skin under negative pressure. The inclined surface 012 provides a buffer for the flow of blood samples. Because the inclined surface 012 is a new hydrophobic material, the surface does not stick to the sample. Under the action of gravity, the collected sample is accelerated along the guide groove 015 flow channel to the collection tube 011.

[0076] After a period of time, the negative pressure will decrease due to leakage, and B can be pressed again. The piston 06 is compressed and the internal air is discharged. The blood collection needle 10 cannot contact the skin due to the obstruction of the launch tube 11, forming a second wound. After the piston 06 is released, the negative pressure in the internal space continues to recover; the blood collection amount can be ensured by strengthening the negative pressure.

[0077] The above embodiments are only specific descriptions of feasible implementation methods of the present invention and are not intended to limit the scope of patent protection of the present invention. As long as the core inventive concept of the present invention and any of the technical means for realizing the inventive concept are involved, they are subject to protection by this patent.

Claims

1. A blood sampling device, characterized in that: The blood sampling device includes a sealing cover, a bottom cover, a top cover, a needle holder, a piston, a blood collection needle, and a launch tube. The sealing cover can be selectively connected to a collection tube, and the bottom cover is accommodated in the accommodating space of the sealing cover; the top cover and the bottom cover are connected as a whole, forming an outer shell support of the blood sampling device; the piston passes through the upper hole of the top cover, and the sealing ring is arranged in the piston sealing ring groove, and a sealed cavity is formed between the piston and the top cover; a second spring is arranged between the piston and the bottom cover to provide continuous power for forming a vacuum degree in the vacuum cavity; the launch tube is movably arranged in the accommodating cavity of the sealing cover to provide a guide and rebound device for the launch tube; the blood collection needle is arranged at the first end of the needle holder, and the second end of the needle holder contacts the piston through an elastic device, and the needle holder is arranged There is a stop arm. When the needle holder moves along the first direction of the launching tube, the stop arm and the blocking member in the launching tube change from the first state to the second state, controlling the lancet to be excited along the first direction, and under the control of the elastic device, the lancet moves a preset distance in the second direction. The existence of the blocking member of the launching tube makes the upper surface of the inclined clamp of the stop arm of the needle holder abut against the lower surface of the blocking member of the launching tube, so that the lancet cannot be reset for a second puncture, so that the lancet cannot contact the skin again after one-time excitation; after a period of time, the piston can be pressed again, and the lancet cannot contact the skin due to the obstruction of the launching tube, forming a second wound. After the piston is released, the negative pressure in the internal space continues to recover, and the blood collection amount can be ensured by strengthening the negative pressure.

2. A blood sampling device according to claim 1, characterized in that: A spiral shrapnel is provided at the bottom of the bottom cover to provide power for the launch tube to rebound.

3. A blood sampling device according to claim 1, characterized in that: The needle holder is also provided with a guide piece, and the guide piece slides in the guide groove of the launching tube.

4. A blood sampling device according to claim 1, characterized in that: The upper portion of the needle holder is provided with a limiting seat for installing an elastic device, and the lower portion is provided with a lock hole for connecting a fixing flange, and the fixing flange fixes the blood collection needle.

5. A blood sampling device according to claim 4, characterized in that: The elastic device is a first spring, which is located at the central axis of the blood sampling device and is arranged between the piston and the needle holder.

6. The blood sampling device according to claim 1, wherein: A one-way valve cover is arranged on the piston to provide one-way airflow control for forming a vacuum chamber for the piston.

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