Blood collection apparatus and use method therefor

Abstract

The present invention provides a blood collection apparatus. A blood collection needle is arranged at a first end of a needle holder. A second end of the needle holder makes contact with a piston by means of an elastic apparatus. The needle holder is provided with a stop arm. When the needle holder moves in a firing cylinder in a first direction, the stop arm and a stopper in the firing cylinder change from a first state to a second state, the blood collection needle is controlled to be activated in the first direction, and under the control by the elastic apparatus, the blood collection needle moves a preset distance in a second direction, so that the blood collection needle cannot make contact with the skin again after a single activation. The present invention further provides a method for using the blood collection apparatus. The present invention uses a technique in which a blood collection needle becomes inoperative after a single activation, thereby avoiding cross-infection caused by repeated punctures.

Description

Blood collection device and method of use thereof TECHNICAL FIELD

[0001] The present application relates to the field of medical and health clinical testing technology, in particular to a peripheral blood collection device for non-professional operation and use and a method of use thereof. BACKGROUND

[0002] In the field of modern medical testing, blood sample collection is one of the important means of diagnosing diseases. However, the traditional blood collection method has many inconveniences, especially in the home environment, these inconveniences are more obvious. With the development of society and the increase of medical needs, blood sample collection technology in the home environment becomes particularly important. The following is an analysis of existing blood collection (or sampling) technology and an outlook for new blood collection devices.

[0003] Limitations of existing blood collection technology, including: inconvenience of hospital blood collection: hospitals, as traditional blood collection sites, often face long queues, complex environments, and other problems, especially for the elderly, children, and patients with limited mobility, it is particularly difficult to go to the hospital for blood collection. Dependence on professional technicians: blood sample collection usually requires professional medical personnel to operate, which not only limits the location of blood collection, but also increases the burden on medical resources. Risk of cross-infection: traditional blood collection techniques may pose a risk of cross-infection, especially when the same blood collection equipment is used multiple times. Technical limitations: existing multi-needle puncture collection technology and vacuum blood collection tube technology, while solving the problem of blood collection to some extent, still have technical difficulties such as complex operation and unstable negative pressure. SUMMARY

[0004] The present application aims to provide a blood collection device that uses a blood collection needle that is activated once and then deactivated to avoid cross-infection caused by multiple punctures. A piston-type vacuum negative pressure source provides continuous negative pressure and can provide negative pressure multiple times, with double-seal rings for more reliable sealing and smoother piston movement. At the same time, micro-channel technology is used to increase the flow rate of blood collection and reduce blood adhesion in the collector, reducing blood clots during the collection process and improving blood sample quality. The present application is simple to operate and lightweight, with a safety lock to prevent accidental triggering. The operation is simple, rotate counterclockwise by a certain angle, paste on the arm or skin with more muscle, and press the blood collection.

[0005] A blood collection device, comprising a seal cover, a bottom cover, a top cover, a needle holder, a piston, a blood collection needle, a launching cylinder, the seal cover is selectively connected to a collection tube, the bottom cover is accommodated in a receiving space of the seal cover, the launching cylinder is movably arranged in a receiving cavity of the seal cover, and a guide and rebound device is provided for the launching cylinder; the blood collection needle is arranged at a first end of the needle holder, a 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 launching cylinder moves in a first direction, the stop arm and a blocking element in the launching cylinder change from a first state to a second state, the blood collection needle is controlled to be activated in the first direction, and under the control of the elastic device, the blood collection needle moves in a second direction by a preset distance, so that the blood collection needle cannot contact the skin again after one-time activation.

[0006] Preferably, a spiral spring is arranged at the bottom of the bottom cover to provide power for the rebound of the launching cylinder.

[0007] Preferably, the needle holder is further provided with a guide piece which slides in a guide groove of the launching cylinder.

[0008] Preferably, a limiting seat for mounting the elastic device is arranged at an upper part of the needle holder, and a locking hole for connecting a fixing flange is arranged at a lower part of the needle holder, and the fixing flange fixes the blood collection needle. The elastic device is a first spring.

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

[0010] Preferably, a one-way valve cover is arranged on the piston to provide one-way air flow control for a vacuum cavity of the piston.

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

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

[0013] Preferably, the handle is arranged to provide a false trigger lock and unlock trigger for the blood collection device.

[0014] A method for using the blood collection device, the A surface of the sampling device is attached to the skin, and the handle is pressed from the B position to the top of the top cover; the needle holder moves in a first direction along the launching cylinder, the stop arm and the blocking element in the launching cylinder change from a first state to a second state, the blood collection needle is controlled to be activated in the first direction, and under the control of the elastic device, the blood collection needle moves in a second direction by a preset distance, so that the blood collection needle cannot contact the skin again after one-time activation.

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

[0016] Handle down phase 1: the first spring is compressed, the helical spring piece of the bottom cover is compressed, the second spring is compressed, the inclined surface clamping piece D of the needle holder stopper arm is blocked by the stopper E of the launching cylinder, at this time, the pushing piece C of the piston has not contacted the inclined surface clamping piece D of the needle holder stopper arm, the one-way valve cover discharges gas;

[0017] Handle down phase 2: the first spring and the second spring continue to be compressed, the launching cylinder moves downward, until the bottom central part of the launching cylinder protrudes from the A surface of the sealing cover and contacts the skin, the launching cylinder is blocked by the sealing cover and no longer moves, the pushing piece C of the piston contacts the inclined surface clamping piece D of the needle holder stopper arm, at this time, the state is the first state;

[0018] Handle down phase 3: the first spring and the second spring continue to be compressed, the pushing piece C of the piston moves on the inclined surface of the inclined surface clamping piece D of the needle holder stopper arm, and the inclined surface clamping piece D of the needle holder stopper arm is pressed inward along the inclined surface;

[0019] Handle down phase 4: the inclined surface clamping piece D of the needle holder stopper arm is pressed inward out of the buckle position, until the pushing piece C of the piston contacts the stopper E of the launching cylinder, the blood taking needle is triggered, at this time, the state is the second state. The blood taking needle and the needle holder are pushed out of the launching cylinder under the action of the first spring, the blood taking needle contacts the skin, completes the puncture and is quickly pulled back by the first spring. Due to the existence of the stopper E of the launching cylinder, the upper surface of the inclined surface clamping piece D of the needle holder is blocked by the lower surface of the stopper E of the launching cylinder, so that the blood taking needle cannot be reset for the second puncture; the blood taking needle and the needle holder are hidden in the launching cylinder together, so that the blood taking needle cannot be triggered for the second puncture after one-time triggering, and the problem of cross infection caused by multiple punctures is avoided.

[0020] The handle is loosened, the piston returns to the initial B position under the action of the second spring, and negative pressure is formed due to space sealing; the launching cylinder returns to the original position under the action of the helical spring piece of the bottom cover.

[0021] Under the action of negative pressure, a small amount of blood continuously flows out from the skin punctured by the needle, the blood is collected, and under the action of gravity, the blood flows into the collection tube along the guide groove of the sealing cover.

[0022] Beneficial effects:

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

[0024] 1. This minimally invasive and painless technique uses multiple capillary needles to instantly puncture the skin at a fixed depth and then withdraw. The circular needles can better form blood flow channels, accelerate blood collection, reduce residue, and reduce user anxiety.

[0025] 2. The technique of using a single-use, deactivated blood collection needle avoids the problem of cross-infection caused by multiple punctures;

[0026] 3. Employing microfluidic technology increases the flow rate of blood collection and reduces blood adhesion within the collector, thereby reducing blood clot formation during collection and improving blood sample quality.

[0027] 4. Simple and lightweight operation, with a safety lock to prevent accidental triggering. It is easy to use. Simply rotate it counterclockwise at a certain angle, then stick it to the arm or a location with more skin and muscle, 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 rings make the seal more reliable, and piston movement is smoother;

[0029] 6. The connection between the blood collection needle and the needle holder is highly adaptable, allowing it to fit snugly against the bevel of the skin during puncture, thus ensuring the effectiveness of the puncture. Attached Figure Description

[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 is an exploded schematic diagram of the external components of the blood collection device of the present invention;

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

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

[0035] Figures 6-7 are three-dimensional views of the sealing cover of the present invention from different angles;

[0036] Figures 8-9 are three-dimensional views of the bottom cover of the blood collection device of the present invention from different angles;

[0037] Figure 10 is a three-dimensional view of the top cover of the blood collection device of the present invention;

[0038] Figures 11-12 are exploded schematic diagrams of the internal components of the blood collection device of the present invention;

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

[0040] Figure 14 is a schematic diagram of the explosion of the handle and piston of the blood collection device of the present invention;

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

[0042] Figure 16 is a 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 is a detailed structural diagram of the sealing cover of the blood collection device of the present invention;

[0045] Figure 19 is a detailed structural diagram of the piston, first spring, needle holder, and launch tube of the blood collection device of the present invention.

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

[0047] Figure 21 is a detailed cross-sectional view of the blood collection device of the present invention. Detailed Implementation

[0048] As shown in Figures 1-21, the present invention provides a blood collection device, comprising 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 launching 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 sealed surface with the skin under negative pressure, so that after the blood is drawn out, it flows into the collection tube 011 through the microchannel.

[0050] The sealing cover 01 includes a receiving space, and the bottom cover 02 is housed within the receiving space of the sealing cover 01. The bottom cover 02 can serve as a skeleton to support the outer sealing cover 01. The bottom cover 02 has a receiving cavity with openings at both ends and provides a guide and rebound device for the internal launching tube 11. The blood collection needle 10 is movably inserted back and forth through the receiving cavity of the bottom cover 02. Helical springs 021 are provided on both sides of the circumferential direction at the bottom of the receiving cavity of the bottom cover 02. The helical springs 021 contact the lower part of the launching tube 11 and provide power for the rebound of the launching tube 11. The launching tube 11 has four guide grooves, two of which are through, and the other two guide grooves are provided with blocking elements. The needle holder 04 is located inside the launching tube 11 and preferably has two guide plates and two stop arms. The guide plates slide up and down in the through guide groove of the launching tube 11, and the stop arms slide in a restricted manner in the guide groove of the launching tube 11 with the blocking elements. The stop arms and the blocking elements of the launching tube 11 prevent the blood collection needle 10 from contacting the skin again after one firing.

[0051] The top cover 03 is connected to the bottom cover 02 by interference fit, fasteners or other means to form an integral whole, which 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 to flow out.

[0052] Preferably, the material of the sealing cover 01 is soft rubber.

[0053] Preferably, referring to Figure 18, the lip-shaped sealing ring 013 of the sealing cover 01 protrudes from the adhesive surface 014; under adsorption conditions, 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 stepless flow channel, which can reduce the amount of blood residue, reduce the time of blood in the collector, and prevent blood from forming clots on the flow channel to hinder detection and sampling.

[0054] Preferably, as shown in Figures 4, 5, and 11-13, the needle holder 04 is provided with two guide plates and two stop arms, the upper part is provided with a limiting seat 041 for installing the first spring 05, and the lower part is provided with a locking hole 042 for connecting the fixing flange 101; the fixing flange 101 fixes the blood collection needle 10.

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

[0056] Furthermore, referring to Figures 4, 5, 11 and 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 part 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 disposed between the piston 06 mounting part and the limit seat 041 of the needle holder 04, and is used to store force to provide power for the blood collection needle 10 to be activated.

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

[0061] Please refer to Figure 20. The sealing ring 08 is disposed 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 it 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 performance better, and contains a trace amount of medical silicone oil inside, which makes the sealing performance better and the pressing smoother.

[0063] The piston 06 is equipped with the sealing ring 08, which forms an internal seal with the top cover 03. The sealing cover 01 forms a lower seal with the top cover 03. The outlet position of the sealing cover 01 and the collection tube 011 together form a seal. 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 retaining element 061, a piston rod 062, and a piston sealing ring groove 063; the retaining element 061 is disposed at the top end of the piston rod 062; the piston rod 062 passes through the middle hole of the top cover 03; the retaining element 061, the piston rod 062, and the piston sealing ring groove 063 respectively form multi-position guides with the top cover 03, reducing the sway 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 activation of the blood collection needle 10 and the vacuum required.

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

[0066] Preferably, referring to Figure 20, the handle 12 is configured to provide anti-accidental triggering and unlocking triggers for the blood collection device, and can be the only part of the sampling device that needs to be operated; the handle 12 includes: a recessed positioning hole 121, a limiting stop 122, and a locking tongue 123; the recessed positioning hole 121 is located at the bottom of the handle 12, preferably two in number, and cooperates with the locking piece 061 on the piston 06 for opening and unlocking positioning; the limiting stop 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, locking the blood collection device; after the locking tongue 123 retracts, the hole 064 and the position 031 form a channel for vertical movement, the blood collection device protective lock is opened, and it can be used normally.

[0067] When in use, rotate the handle 12 counterclockwise by a certain angle until you hear a "click" sound, and the clip 061 enters the recessed positioning hole 121. In the direction shown in Figure 21, peel off the protective film 13 of the adhesive surface 014, press the A side against the skin, and press the handle 12 from the B position to the top of the top cover. The piston 06 moves in the direction relative to the skin, which is the first direction.

[0068] Handle 12 moves down in stage 1: The strength of the first spring 05 is higher than that of the spiral spring 021 of the bottom cover 02. The first spring 05 is compressed. As the piston 06 continues to move down, the spiral spring 021 is compressed and the second spring 09 is compressed. The inclined plate D of the stop arm of the needle support 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 plate D of the stop arm of the needle support 04. The one-way valve cover 07 discharges gas.

[0069] Handle 12 moves down in stage 2: The first spring 05 and the second spring 09 continue to be compressed, and the launching tube 11 moves down until the center of the bottom of the launching tube 11 extends out of the A side of the sealing cover 01 and contacts the skin. The launching tube 11 stops moving against the sealing cover 01. At this time, the pushing part C of the piston 06 contacts the inclined locking part D of the stop arm of the needle holder 04. This state is the first state.

[0070] Handle 12 moves down in stage 3: the first spring 05 and the second spring 09 continue to be compressed; the extrusion member C of the piston 6 moves relative to the inclined surface of the inclined surface clamping member D of the needle holder 04 stop arm, pressing the inclined surface clamping member D of the needle holder 04 stop arm inward along the inclined surface.

[0071] In the fourth stage of lowering the handle 12: the inclined retaining member D of the needle holder 04 is pressed inward to disengage it until the pushing member C of the piston 06 contacts the blocking member E of the launching tube 11, at which point the blood collection needle 10 is activated, and the state is the second state. The blood collection needle 10 and the needle holder 04 are pushed out of the launching 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 launching tube 11, the upper surface of the inclined retaining member D of the needle holder 04 abuts against the lower surface of the blocking member E of the launching tube 11, preventing the blood collection needle 10 from resetting for a second puncture. At this time, the blood collection needle 10 and the needle holder 04 are hidden together inside the launching tube 11, ensuring that the blood collection needle cannot be punctured a second time after being activated once, thus avoiding the problem of cross-infection caused by multiple punctures.

[0072] When handle 12 is released, piston 06 returns to its initial position B under the action of the second spring 09, and negative pressure is formed due to the space seal; under the action of the helical spring plate 21 of the bottom cover 02, the launching tube 11 rises back to its original position;

[0073] Meanwhile, under negative pressure, a small amount of blood will continuously flow out of 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] When a blood collection needle creates a wound, the blood sample seeps out. Due to the small amount, the blood will remain in place until it reaches a certain volume and then adheres to each other. Due to the difference in hydrophilicity, the blood will flow along the wound and remain inside the sealing cover 01.

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

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

[0077] The above embodiments are merely illustrative of feasible implementations of the present invention and are not intended to limit the scope of patent protection of the present invention. Any invention involving either the core inventive concept or the technical means for implementing the inventive concept falls within the scope of this patent protection.

Claims

1. A blood collection device, characterized in that: The blood collection device includes a sealing cover, a bottom cover, a top cover, a needle holder, a piston, a blood collection needle, and a launching tube. The sealing cover can be selectively connected to a collection tube. The bottom cover is housed within the receiving space of the sealing cover. The launching tube is movably disposed within the receiving cavity of the sealing cover, providing a guide and rebound device for the launching tube. The blood collection needle is disposed at the first end of the needle holder, and the second end of the needle holder contacts the piston through an elastic device. The needle holder is provided with a stop arm. When the launching tube moves along a first direction, the stop arm and the blocking element in the launching tube change from a first state to a second state, controlling the blood collection needle to be activated along the first direction. 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 activated once.

2. A blood collection device as described in claim 1, characterized in that: The bottom of the cover is equipped with a spiral spring to provide power for the launch tube to rebound.

3. A blood collection device as described in claim 1, characterized in that: The needle holder is also provided with a guide plate, which slides in the guide groove of the launch tube.

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

5. A blood collection device as described in claim 4, characterized in that: The elastic device is a first spring, which is located on the central axis of the blood collection device and is disposed between the piston and the needle holder.

6. A blood collection device as described in claim 1, characterized in that: A one-way valve cover is disposed on the piston to provide one-way airflow control for the piston to form a vacuum chamber.

7. A blood collection device as described in claim 1, characterized in that: A sealing ring is disposed in the piston sealing ring groove to form a sealing cavity between the piston and the top cover.

8. A blood collection device as described in claim 1, characterized in that: The second spring is disposed between the piston and the bottom cover.

9. A method of using the blood collection device as described in any one of claims 1-8, characterized in that: Place side A of the sampling device against the skin, press the handle from position B to the top of the cover; the needle holder moves in the launch tube along the first direction, the stop arm and the blocking member in the launch tube change from the first state to the second state, control the blood collection needle to be activated 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 come into contact with the skin again after being activated once.

10. A method of using the blood collection device as described in claim 9, characterized in that, The specific process of the first state changing to the second state is as follows: Handle lowering stage 1: The strength of the first spring is higher than that of the spiral spring of the bottom cover. The first spring is compressed. During the piston's continued lowering process, the spiral spring is compressed and the second spring is compressed. The inclined plate D of the needle support stop arm abuts against the blocking member E of the launching tube. At this time, the piston's pushing member C has not yet contacted the inclined plate D of the needle support stop arm, and the one-way valve cover discharges gas. Hand-down movement stage 2: The first spring and the second spring continue to be compressed, and the launch tube moves down until the center of the bottom of the launch tube extends out of the A side of the sealing cover and contacts the skin. The launch tube stops moving against the sealing cover, and the piston's pushing member C contacts the inclined locking member D of the needle support stop arm. At this time, the state is the first state. Hand-down movement stage 3: The first spring and the second spring continue to be compressed; the piston's pushing member C moves relative to the inclined surface of the needle support stop arm's inclined surface clamp D, pressing the needle support stop arm's inclined surface clamp D inward along the inclined surface; Step 4: Push the inclined retainer D of the needle holder arm inward to release the latch until the piston pusher C contacts the stopper E of the launch tube. The blood collection needle is activated, and 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 stopper E of the launch tube, the upper surface of the inclined retainer D of the needle holder abuts against the lower surface of the stopper E of the launch tube, preventing the blood collection needle from resetting 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. When the handle is released, the piston returns to its initial position B under the action of the second spring, and a negative pressure is formed due to the space seal; the launching tube rises back to its original position under the action of the helical spring plate on the bottom cover; Under negative pressure, a small amount of blood will continuously flow out when the skin is 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.

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