CN111603179A

CN111603179A - Medical collector for human blood

Info

Publication number: CN111603179A
Application number: CN202010562051.9A
Authority: CN
Inventors: 王翠兰
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2020-09-01

Abstract

The invention relates to the technical field of medical instruments, in particular to a human blood medical collector, which comprises a cylinder, a blocking needle and a driving piece, wherein the cylinder is provided with a needle hole; one end of the cylinder is provided with a needle head communicated with the inside, the bottom of the cylinder is provided with a liquid outlet communicated with the inside, the inside of the cylinder is provided with a piston, and the piston is provided with a through hole; one end of the blocking needle penetrates through the through hole and is connected with the driving piece, and the other end of the blocking needle can be inserted into and pulled out of a needle hole of the needle head and is in sealing fit with the needle hole when being inserted; the blocking needle is provided with a driving part; the driving piece is used for driving the blocking needle to be pulled out of the needle hole in a blood sucking state and driving the piston to move through the driving part so as to open the needle hole and the liquid outlet and enable the needle hole to be communicated with the liquid outlet; and when in the state of blood injection, the other end of the blocking needle is driven to be inserted into the needle hole, and then the piston is driven to close the needle hole and the liquid outlet. The invention can avoid repeated needle insertion for patients when blood samples are collected for multiple times, and has lower power cost.

Description

Medical collector for human blood

Technical Field

The invention relates to the technical field of medical instruments, in particular to a medical collector for human blood.

Background

At present, when blood needs to be monitored and detected, venous blood drawing and rapid fingertip peripheral blood are mostly adopted clinically to detect blood samples, and the aim of detection is achieved through needle prick blood collection. For most critical emergency patients, in order to understand pathological information of the patients, guide treatment and evaluate prognosis, multiple blood drawing tests are generally needed, but repeated blood drawing damages tissues and blood vessels, and even bleeding at puncture points of the patients with partial blood coagulation dysfunction is caused.

In order to solve the above problems, as shown in fig. 1, the prior art provides a human blood medical collector, which comprises a vein indwelling body, a piston driving device 7 and a suction device 9. The vein indwelling body is provided with a needle head 1, a piston channel 34 with an opening at the front end is arranged in the needle head 1, and a blood sampling piston 33 penetrates into the piston channel 34 and is in reciprocating sliding fit with the piston channel 34. The needle 1 is also provided with a capillary channel 2, the channel wall of the piston channel 34 is provided with a flow-through channel 4 near the front end, and the distance between the flow-through channel 4 and the front end opening of the piston channel 34 is larger than the length of the blood taking piston 33. The front end of the capillary channel 2 is communicated with the piston channel 34 through the flow passage 4. Wherein the piston driving means 7 is for driving the blood collection piston 33 to reciprocate along the piston passage 34. The suction device 9 is used to suck blood in the capillary channel 2.

When the human blood medical collector is used, the needle head 1 is implanted into a vein, the piston driving device 7 drives the blood collecting piston 33 to retract so as to suck blood into the piston channel 34, when the blood collecting piston 33 retracts to the rear side of the overflowing channel 4, the blood enters the capillary channel 2 through the overflowing channel 4, and then the sucking device 9 sucks the blood in the capillary channel 2 to the blood sample detection system 10. After the blood collection is finished, the piston driving device 7 drives the blood collection piston 33 to move forward to seal the front end opening of the piston channel 34, and the pumping device 9 continues to operate until all the blood in the capillary channel 2 is pumped out.

In the above example, since it is necessary to provide the piston driving means 7 to drive the piston 33 to reciprocate to suck blood or seal the front end opening of the piston passage 34; and a suction device 9 is also needed to suck the blood in the capillary channel 2, and the use of the piston driving device 7 and the suction device 9 results in a larger number of power devices and increases the cost, so that improvement is urgently needed.

Disclosure of Invention

In view of this, the present invention provides a blood medical collector for human body, which mainly aims to solve the technical problem of how to avoid repeated needle insertion for a patient when blood samples are collected for multiple times, and to reduce the power cost of the blood medical collector for human body.

In order to achieve the purpose, the invention mainly provides the following technical scheme:

the embodiment of the invention provides a human blood medical collector, which comprises a barrel, a blocking needle and a driving piece, wherein the barrel is provided with a needle hole; the needle head communicated with the interior is arranged at one end of the cylinder, the liquid outlet communicated with the interior is arranged at the bottom of the cylinder, the piston is arranged in the cylinder, and a through hole is formed in the piston; one end of the blocking needle penetrates through the through hole and is connected with the driving piece, and the other end of the blocking needle can be inserted into and pulled out of the needle hole of the needle head and is in sealing fit with the needle hole when being inserted; the blocking needle is provided with a driving part; the driving piece is used for driving the blocking needle to be pulled out of the needle hole in a blood sucking state, and the driving part drives the piston to move so as to open the needle hole and the liquid outlet and enable the needle hole to be communicated with the liquid outlet; and when in a blood injection state, the other end of the blocking needle is firstly driven to be inserted into the needle hole, and then the piston is driven to close the needle hole and the liquid outlet.

Optionally, the driving part is a clamping table arranged on the blocking needle, and the driving part is used for pushing against the hole edge of the via hole through the clamping table in a blood sucking state so as to drive the piston to move.

Optionally, the blocking needle is in a stepped shaft shape, so that an annular clamping table is formed at the step.

Optionally, an annular guide inclined plane is arranged at the end part of the other end of the blocking needle.

By the technical scheme, the human blood medical collector at least has the following beneficial effects:

1. when the blood of a patient needs to be collected for multiple times, the needle head can be kept in the body of the patient without being pulled out, so that the tissue and the blood vessel of the patient are prevented from being damaged due to repeated needle insertion on the patient. In addition, the blood collection of the patient can be realized only by moving the driving piece, and the power cost is low;

2. the inner part of the cylinder body can be cleaned under the condition that the needle head is not pulled out;

3. for the patient needing to repeatedly take blood samples for a plurality of times, the barrel can be detached before the next blood sample is taken, and only the needle head and the blocking needle are left on the body of the patient, so that the adverse effect on the activity of the patient is reduced.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.

Drawings

FIG. 1 is a schematic diagram of a prior art medical blood collection device;

fig. 2 is a schematic structural diagram of a human blood medical collector according to an embodiment of the present invention;

FIG. 3 is an exploded view of the human blood medical collector of FIG. 2;

FIG. 4 is a half-sectional view of the human blood medical collector of FIG. 2 in an initial state;

FIG. 5 is a half-sectional view of the body blood medical collector of FIG. 2 in a state of blood suction;

FIG. 6 is a half-sectional view of the human blood medical collector of FIG. 2 in a state of blood injection;

fig. 7 is a half-sectional view of the human blood medical collector of fig. 2 in a cleaning state.

Reference numerals: 1. a barrel; 2. blocking the needle; 3. a drive member; 4. a needle head; 5. a piston; 6. a connecting rod; 7. a button; 8. a convex column; 21. clamping a platform; 31. a handle; 32. a raised head; 61. a hook part; 62. a rotation operation part; 101. a liquid outlet; 102. a liquid inlet; 201. blocking one end of the needle; 202. the other end of the needle is blocked; 203. positioning holes; 401. a pinhole; 501. a card slot; 502. and (6) a via hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

As shown in fig. 2 and 3, one embodiment of the present invention provides a human blood medical collector, which comprises a barrel 1, an occlusion needle 2 and a driving member 3. One end of the cylinder body 1 is provided with a needle 4 communicated with the inside. Preferably, the needle 4 is detachable from the barrel 1, for example, it may be a bayonet fitting. In one example, one end of the barrel 1 may be provided with a convex pillar 8, the needle 4 has a connector and a needle body disposed on the connector, the connector is provided with an insertion groove for inserting the convex pillar 8, and the insertion groove is in insertion fit with both the convex pillars 8. The bottom of the cylinder 1 is provided with a liquid outlet 101 communicated with the inside. The interior of the cylinder 1 is provided with a piston 5, and the piston 5 can reciprocate along the axial direction of the cylinder 1. The piston 5 is provided with a through hole 502.

As shown in fig. 4, one end 201 of the plugging pin 2 is used to pass through the through hole 502 and is connected with the driving member 3. The other end 202 of the blocking needle 2 can be inserted into or pulled out of the needle hole 401 of the needle head 4 and is in sealing fit with the needle hole 401 when being inserted; wherein the other end 202 of the blocking needle 2 may have a shape conforming to the needle hole 401 to effect a sealing fit with the needle hole 401 upon insertion. The blocking needle 2 is also provided with a driving part.

The human blood medical collector can suck blood of a patient or inject the sucked blood out, such as injecting the blood into a blood sample detection system for blood detection. Thus, the aforementioned driver 3 has a blood-sucking state and a blood-injecting state. As shown in fig. 5, the driving member 3 is used to drive the blocking needle 2 to be pulled out from the needle hole 401 in a blood sucking state, and the driving portion drives the piston 5 to move so as to open the needle hole 401 and the liquid outlet 101, so that the needle hole 401 communicates with the liquid outlet 101, and at this time, blood in the patient can flow into the barrel 1 through the needle hole 401. The driving member 3 is also used to drive the other end 202 of the blocking needle 2 to be inserted into the needle hole 401 (as shown in fig. 6) and then drive the piston 5 to close the needle hole 401 and the liquid outlet 101 (as shown in fig. 4) in the blood injection state. Fig. 6 shows a half-sectional view of the driver 3 driving the other end 202 of the needle 2 to be inserted into the needle hole 401 at the initial stage of injection, and fig. 4 shows a half-sectional view of the driver 3 driving the piston 5 to close the needle hole 401 and the liquid outlet 101 after the injection is finished. In the blood injection state, after the driving member 3 drives the other end 202 of the blocking needle 2 to be inserted into the needle hole 401, one end of the blocking needle can abut against the piston 5 to push the piston 5 to close the needle hole 401 and the liquid outlet 101.

In the state of blood injection, the other end 202 of the blocking needle 2 blocks the needle hole 401 first, so that the blood pumped in the cylinder 1 can be injected from the liquid outlet 101 when the driving element 3 performs the blood injection operation, and the blood can be effectively prevented from flowing back to the body of a patient through the needle hole 401 in the process of blood injection.

In the above example, when it is desired to collect blood from a patient a plurality of times, the needle 4 may be left in the patient without being pulled out, so as to avoid damage to the patient's tissues and blood vessels caused by repeated needle insertions. In addition, the blood collection of the patient can be realized only by moving the driving part 3, and compared with the prior art that the blood collection of the patient can be realized only by two power devices, namely a piston driving device and a suction device, the blood collection device only needs one power device, namely the driving part 3, so that at least one power device is saved, and the power cost is lower.

As shown in fig. 3, the driving part may be a chuck 21 provided on the blocking pin 2. The driving member 3 is used for abutting against the hole edge of the through hole 502 through the clamping table 21 in the blood sucking state to form a clamping state so as to drive the piston 5 to move. Specifically, when the driving member 3 operates to suck blood, the driving member 3 drives the blocking needle 2 to retract, and after the blocking needle 2 retracts for a certain distance, the clamping table 21 on the blocking needle 2 abuts against the edge of the through hole 502 on the piston 5, and when the blocking needle 2 continues to retract, the piston 5 is driven to move together, so that the piston 5 opens the needle hole 401 and the liquid outlet 101 (as shown in fig. 5). When the blocking needle 2 is completely pulled out from the needle hole 401, the blood in the patient body can flow into the barrel body 1 along the needle hole 401.

In a specific application example, as shown in fig. 3, the blocking needle 2 may have a stepped shaft shape to form the aforementioned clamping table 21 at the step, and the clamping table 21 has a ring shape.

As shown in fig. 3, the end of the other end 202 of the blocking needle 2 may be provided with a guide surface which can guide the insertion of the other end 202 of the blocking needle 2 into the needle hole 401. Preferably, the guiding surface is a slope and is annular to guide the insertion of the other end 202 of the blocking needle 2 into the needle hole 401 in the circumferential direction, so that the guiding effect is better.

As shown in FIG. 7, the bottom of the cylinder 1 may be provided with a liquid inlet 102 communicating with the inside. The human blood medical collector of the invention can also comprise a locking mechanism, the locking mechanism is used for locking the piston 5 so as to connect the piston 5 and the driving piece 3; or to unlock the piston 5 from the driver 3. After the driving member 3 drives the piston 5 to reciprocate to suck or inject blood, a small amount of blood adheres to the inner walls of the piston 5 and the cylinder 1, the piston 5 cannot completely inject the blood from the cylinder 1, and after a long time, especially in a high-temperature weather, the blood may deteriorate and mix with the next sucked blood, thereby affecting the measurement result of the blood sample. With the arrangement in this example, the piston 5 can be locked by the locking mechanism, so that the driving member 3 can drive the piston 5 to move together. Specifically, as shown in fig. 7, after the locking mechanism locks the piston 5, the driving member 3 may drive the piston 5 and the blocking needle 2 to retract together for a certain distance, and at this time, the other end 202 of the blocking needle 2 is still inserted into the needle hole 401, but the retracted piston 5 may open the liquid outlet 101 and the liquid inlet 102, and at this time, a cleaning liquid may be introduced into the liquid inlet 102, and the cleaning liquid may flow out from the liquid outlet 101 after cleaning the piston 5 and the inner wall of the cylinder 1, so that the piston 5 and the inner portion of the cylinder 1 may be cleaned without pulling out the needle 4.

Here, it should be noted that: the inlet 102 may be provided with a valve for controlling the opening and closing of the inlet 102. Similarly, a valve may be disposed at the outlet 101, and preferably, the valve at the outlet 101 may be a one-way valve to prevent backflow of blood during the blood injection process.

In order to achieve the function of the locking mechanism, as shown in fig. 7, the locking mechanism may include a link 6, the link 6 is movably disposed on the driving member 3, and one end of the link 6 is provided with a hook 61. The piston 5 is provided with a clamping groove 501. The connecting rod 6 is used for driving the hook part 61 to be clamped into the clamping groove 501 when moving to the first position so as to lock the piston 5; and moving to the second position to drive the hook 61 to disengage from the catch 501 to unlock the piston 5. The locking and unlocking of the piston 5 is realized by the matching of the hook part 61 and the clamping groove 501, and the operation is relatively convenient.

Wherein, the aforementioned connecting rod 6 may be a sliding member to move to the first position and the second position along the set track. The connecting rod 6 may also be a rotary member to rotate about its own axis to a first position and a second position. When the link 6 is a rotary member, the hook 61 is disposed on one side of the end of the link 6, i.e., the hook 61 is not annular.

In order to facilitate the hook portion 61 to be clamped into the clamping groove 501, preferably, the clamping groove 501 may be in a shape of a stepped groove, a small diameter section of the stepped groove is located at an end of the piston 5, and a large diameter section of the piston 5 is located inside the piston 5, so that the hook portion may hook at a step of the stepped groove.

In order to process the above-mentioned slot 501, the piston 5 may include a piston body and an end cap, wherein one end of the piston body is provided with an inner hole, and the end cap covers the inner hole of the piston body and has a through hole communicated with the inner hole. Wherein, the end cover can adopt screw etc. to be connected with the piston body. The through hole on the end cap and the inner hole on the piston body are matched to form the clamping groove 501.

As shown in fig. 3, the driving member 3 may have a handle 31, and the user may operate the driving member 3 through the handle 31 to move the driving member 3. Another through hole is provided on the handle 31. The end of the connecting rod 6, which is far away from the hook 61, passes through the other through hole, and is provided with a rotating operation part 62. In this example, the rotation operation portion 62 of the link 6 is provided on the handle 31, which facilitates the user to operate the handle 31 and also allows the link 6 to be operated.

Further, the driving member 3 is detachably connected to the end 201 of the blocking needle 2, and the barrel 1 is detachable with respect to the needle 4. The needle 4 together with the blocking needle 2 can be detached from the barrel 1 in this way, so that the needle 4 and the blocking needle 2 can be detained on the body of the patient. Therefore, for a patient needing to repeatedly collect blood samples, the needle head 4 does not need to be pulled out of the patient; and before blood sample is collected next time, the barrel body 1 can be detached from the needle head 4, and only the needle head 4 and the blocking needle 2 are detained on the body of the patient, so that the lighter detained weight has less influence on the life of the patient and is convenient for the patient to go out.

The driving member 3 can be detachably connected to the end 201 of the blocking pin 2 in various ways, for example, the driving member and the blocking pin can be connected by threads, clamped, or screwed. The one end of the barrel 1 and the needle 4 can be plugged and matched, and reference is made to the description in the foregoing for details, which are not repeated herein.

In order to facilitate the removal of the driver 3 from the stopper needle 2, it is preferable that the stopper needle 2 is fixed when the driver 3 is removed. For example, when the driving member 3 and the blocking needle 2 are screwed, if the blocking needle 2 is not fixed, the blocking needle 2 is driven to rotate together when the driving member 3 is screwed, so that the driving member 3 cannot be detached. Therefore, in one example, the human blood medical collector of the invention can further comprise another locking mechanism which is used for locking the blocking needle 2 when the blocking needle 2 is inserted into the needle hole 401 or unlocking the blocking needle 2 from the needle hole 401. Optionally, as shown in fig. 4, the another locking mechanism may be a button 7 disposed on the needle head 4, and the blocking needle 2 is provided with a positioning hole 203 for the button 7 to be inserted into, so that when the blocking needle 2 is inserted into the needle hole 401, the blocking needle 2 can be fixed or unlocked by pressing the button 7, and the operation is convenient.

The button 7 can be disposed on the connecting head of the needle 4, and the specific structure of the button 7 is the prior art and will not be described herein.

Here, it should be noted that: as shown in fig. 3, the driving member 3 may be h-shaped, one end of the driving member 3 is a handle 31, the other end of the driving member 3 is a raised head 32, the raised head 32 is provided with a threaded hole, and one end 201 of the plugging needle 2 is screwed into the threaded hole. The connecting rod 6 passes through the raised head 32 and the handle 31 in sequence, the hook part 61 at one end of the connecting rod 6 is positioned at one side of the raised head 32, which is far away from the handle 31, and the rotating operation part 62 at the other end of the connecting rod 6 is positioned at one side of the handle 31, which is far away from the raised head 32. In order to provide an indication to the user to rotate the link 6, it is preferable that the rotation operation portion 62 be provided with an indication mark such as an arrow or the like.

The working principle and preferred embodiments of the present invention are described below.

The invention aims to design a human blood medical collector, when the human blood medical collector is used, a needle head 4 is inserted into a vein of a patient, then a driving piece 3 is pulled, after the driving piece 3 drives a blocking needle 2 to move for a certain distance, a clamping table 21 on the blocking needle 2 is abutted against the edge of a through hole 502 on a piston 5, the driving piece 3 is continuously pulled until the blocking needle 2 is pulled out of a needle hole 401 (as shown in figure 5), at the moment, the driving piece 3 drives a piston 5 to move together through the blocking needle 2, the piston 5 opens the needle hole 401 and a liquid outlet 101, and blood in the patient flows into a barrel body 1 through the needle hole 401. After a sufficient amount of blood sample is extracted, the driving member 3 is pressed, the driving member 3 drives the blocking needle 2 to move first, so that the blocking needle 2 is inserted into the needle hole 401, after the driving member 3 moves for a certain distance, one end of the driving member 3 abuts against the piston 5 (as shown in fig. 6), and when the driving member 3 continues to move, the driving member 3 pushes the piston 5 to inject the blood sample in the barrel 1 out of the liquid outlet 101 (as shown in fig. 4), for example, the blood sample can be injected into a blood detection system to perform blood detection.

As shown in fig. 7, when the interior of the cylinder 1 needs to be cleaned without pulling out the needle 4, the connecting rod 6 may be rotated to hook the hook portion 61 on the connecting rod 6 on the clamping groove 501 on the piston 5, and then the driving member 3 is pulled, the driving member 3 drives the piston 5 to retract for a certain distance, at this time, the other end 202 of the blocking needle 2 is still inserted into the needle hole 401, but the retracted piston 5 opens the liquid outlet 101 and the liquid inlet 102, at this time, a cleaning liquid may be introduced into the liquid inlet 102, and the cleaning liquid flows out from the liquid outlet 101 after cleaning the inner walls of the piston 5 and the cylinder 1, so that the interior of the piston 5 and the cylinder 1 can be cleaned without pulling out the needle 4.

In addition, for the patient needing to repeatedly collect blood samples, the needle head 4 does not need to be pulled out of the patient; and before blood sample is collected next time, the barrel body 1 can be detached from the needle head 4, and only the needle head 4 and the blocking needle 2 are detained on the body of the patient, so that the lighter detained weight has less influence on the life of the patient and is convenient for the patient to go out.

Here, it should be noted that: in the case of no conflict, a person skilled in the art may combine the related technical features in the above examples according to actual situations to achieve corresponding technical effects, and details of various combining situations are not described herein.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. A medical collector for human blood is characterized by comprising a cylinder body (1), a blocking needle (2) and a driving piece (3);

the needle head (4) communicated with the interior is arranged at one end of the barrel body (1), the liquid outlet (101) communicated with the interior is arranged at the bottom of the barrel body (1), the piston (5) is arranged in the barrel body (1), and a through hole (502) is formed in the piston (5);

one end (201) of the blocking needle (2) is used for penetrating through the through hole (502) and is connected with the driving piece (3), and the other end (202) can be inserted into and pulled out of a needle hole (401) of the needle head (4) and is in sealing fit with the needle hole (401) when being inserted; the blocking needle (2) is provided with a driving part;

the driving part (3) is used for driving the blocking needle (2) to be pulled out of the needle hole (401) in a blood sucking state, and driving the piston (5) to move through the driving part so as to open the needle hole (401) and the liquid outlet (101) and enable the needle hole (401) to be communicated with the liquid outlet (101); and when in a blood injection state, the other end (202) of the blocking needle (2) is firstly moved to be inserted into the needle hole (401), and then the piston (5) is driven to close the needle hole (401) and the liquid outlet (101).

2. The human blood medical collector of claim 1,

the driving part is a clamping table (21) arranged on the blocking needle (2), and the driving part (3) is used for pushing against the hole edge of the through hole (502) through the clamping table (21) in a blood sucking state so as to drive the piston (5) to move.

3. The human blood medical collector of claim 2,

the blocking needle (2) is in a stepped shaft shape, so that an annular clamping table (21) is formed at the step.

4. A human blood medical collector according to any one of claims 1-3,

the end part of the other end (202) of the blocking needle (2) is provided with an annular guide inclined plane.