Blood collection device for nursing

Abstract

The invention discloses a blood collection device for nursing, relates to the technical field of blood collection instruments, and provides the following scheme that the blood collection device for nursing comprises a hemodialysis catheter part, the rear end of the hemodialysis catheter part is connected with a blood sample filtering part, and a negative pressure type blood extraction part is fixed to the right side wall of the blood sample filtering part; a blood sample storage part is arranged at the rear end of the blood sample filtering part, and the hemodialysis catheter part comprises a connecting joint and an insertion tube fixedly connected to a port in the front end of the connecting joint. According to the technical scheme, the collection needle tube mechanism is designed to be connected with the arterial needle, blood collection is carried out in the dialysis process, and a structure capable of cleaning saline water and / or heparin in the arterial needle is arranged in the collection needle tube mechanism, so that a dialyzed or diluted blood sample is prevented from being collected; and the situation that the blood detection value is not accurate enough due to the influence of saline water or heparin on the blood sample data is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of blood collecting instruments, and in particular to a blood collecting device for nursing. Background Art

[0002] Correct collection of blood specimens by hemodialysis centers is crucial to improving the accuracy of test results. Blood collection is an important step in testing the adequacy of hemodialysis. Generally speaking, blood is collected from the arterial end before connecting the arterial line and flushing the puncture needle. Ensuring that there is no saline and / or heparin in the arterial needle before blood collection can prevent dilution of the blood sample. If hemodialysis has already begun, or there is heparin or saline in the arterial needle, in order to prevent the collection of dialyzed or diluted blood samples, no blood samples will be taken before dialysis. However, this also lacks blood samples during this period of the dialysis process, and it will take some time after the dialysis is completed before blood can be collected again, which undoubtedly prolongs the sampling process. Therefore, based on the above, a technician in this field hereby proposes a solution for a blood collection device for nursing. Summary of the invention

[0003] In view of the defect that a certain amount of heparin and saline solution exist in the blood collected during the blood collection operation in the hemodialysis department, which affects the accuracy of the blood pressure sample, a technical solution of a blood collection device for nursing is provided; it includes a hemodialysis catheter, the rear end of which is connected to a blood sample filter, a negative pressure blood extraction component is fixed on the right side wall of the blood sample filter, and a blood sample storage component is arranged at the rear end of the blood sample filter; specifically, before or during the hemodialysis, the interface at the rear end of the blood outlet tube is inserted into the liquid inlet port, and the silicone cylinder is pulled out from the inside of the sleeve, the insertion rod is then pulled out from the circular hole inside the liquid outlet port, and the needle stem at the front end of the needle plug is inserted into the circular hole inside the liquid outlet port. The air inside the negative pressure cylinder is extracted by the pull rod and the rubber movable plug, and after the negative pressure is formed inside the negative pressure cylinder, the blood enters the front side space of the inner cavity of the tank body along the cannula and the blood outlet tube. Since the tank body is made of transparent material, after the front area of ​​the inner cavity of the tank body has %-% blood, the blood in the front area of ​​the inner cavity of the tank body is extracted by using the piston and the piston rod, and the blood passes through the blood semipermeable membrane under the greater negative pressure formed by the blood sample storage component, and the blood semipermeable membrane filters the physiological saline or heparin, so that the amount of physiological saline or heparin in the blood entering the rear area of ​​the inner cavity of the tank is reduced.

[0004] The hemodialysis catheter comprises a connecting joint, a cannula fixedly connected to the front end port of the connecting joint, and a blood outlet tube and a blood inlet tube fixedly connected to two rear end ports of the connecting joint, and the rear end ports of the blood outlet tube and the blood inlet tube are both connected with interfaces;

[0005] The blood sample filter comprises a tank body, a collar fixed in the tank body cavity, and a blood semipermeable membrane fixedly connected to the inner ring of the collar, and the front end of the tank body is fixedly connected to a liquid inlet port, the rear end of the tank body is fixedly connected to a liquid outlet port, and a sleeve is sleeved on the outer ring surface of the liquid outlet port; wherein the blood semipermeable membrane divides the inner cavity space of the tank body into two parts, front and rear;

[0006] The negative pressure blood extraction device comprises a negative pressure cylinder, a rubber movable plug movably arranged in the inner cavity of the negative pressure cylinder, and a guide tube connected to the front end port of the negative pressure cylinder, wherein one end of the guide tube away from the negative pressure cylinder is inserted into the front side space of the inner cavity of the tank body;

[0007] The blood sample storage component comprises a syringe, a needle plug clamped at the front end of the syringe, and a needle stem fixedly connected to the front end of the needle plug, and a piston is movably arranged in the inner cavity of the syringe.

[0008] In the above-mentioned technical solution of the blood collection device for nursing care, preferably: the pointed end of the cannula away from the connecting joint is inserted into the patient's body, and two bayonet sockets for connecting the blood outlet tube and the blood inlet tube are provided on the rear end face of the connecting joint, wherein the interface at the rear end of the blood outlet tube is inserted into the front end port of the liquid inlet port.

[0009] In the technical solution of the above-mentioned blood collection device for nursing care, preferably: the front end end of the liquid inlet port is provided with a snap-on connection with the interface, and the rear end face of the liquid outlet port is provided with a circular hole for inserting the needle stem, and the interior of the circular hole is filled and fixed with a sealing ring.

[0010] In the technical solution of the above-mentioned blood collection device for nursing care, preferably: a silicone cylinder is plugged in the rear end port of the sleeve, an insertion rod is fixedly connected to the front end face of the silicone cylinder, the section of the insertion rod away from the silicone cylinder is inserted into the circular hole at the rear end of the liquid outlet port, and the outer ring surface of the insertion rod is in close contact with the inner ring of the sealing ring inside the liquid outlet port.

[0011] In the technical solution of the above-mentioned blood collection device for nursing, preferably: a plurality of circles of sealing gaskets are fixed on the outer ring surface of the silicone cylinder by adhesive, a bayonet is provided inside the front end port of the sleeve, and a block is provided on the outer ring surface of the liquid outlet port.

[0012] In the technical solution of the above-mentioned blood collection device for nursing care, preferably: the end of the guide tube penetrating into the inner cavity of the tank body is flush with the inner cavity side wall of the tank body, and the end of the guide tube located in the tank body is located in front of the blood semipermeable membrane.

[0013] In the technical solution of the above-mentioned blood collection device for nursing care, preferably: two clamps are fixed on the outer ring surface of the negative pressure cylinder and the outer ring surface of the tank body, and a support rod is fixedly connected to the surface of one side of the clamps close to each other.

[0014] In the technical solution of the above-mentioned blood collection device for nursing care, preferably: a pull rod penetrating to the outside of the negative pressure cylinder is fixedly connected to the rear end surface of the rubber movable stopper.

[0015] In the technical solution of the above-mentioned blood collection device for nursing care, preferably: the end of the needle stem away from the needle plug is inserted into the liquid outlet port and the tank body cavity, and there is a distance of 2.0mm-5.0mm between the front end of the needle stem after it is fully inserted and the rear surface of the blood semipermeable membrane.

[0016] In the technical solution of the above-mentioned blood collection device for nursing care, preferably: the rear end face of the piston is fixedly connected with a piston rod penetrating to the outside of the syringe, and a circle of sealing ring is fixed on the outer ring surface of the piston by adhesive.

[0017] It can be seen from the above technical solution that the present invention provides a blood collection device for nursing care. Compared with the prior art, the present invention has the following beneficial effects:

[0018] In the technical solution of the present invention, a collection needle tube mechanism is designed to be connected to the arterial needle. Blood is collected during dialysis, and a structure capable of cleaning saline and / or heparin inside the arterial needle is provided in the collection needle tube mechanism to prevent the collection of dialyzed or diluted blood samples, thereby preventing the blood sample data from being affected by saline or heparin, resulting in inaccurate blood test values. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces and describes the drawings required for use in the embodiments of the present invention or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 This is a schematic diagram of the overall structure of a blood collection syringe;

[0021] Figure 2 is a schematic diagram of a hemodialysis catheter;

[0022] Figure 3 is a schematic diagram of a blood sample filter;

[0023] Figure 4 It is a schematic diagram of a negative pressure blood extraction device;

[0024] Figure 5 A schematic diagram of a blood sample storage unit.

[0025] Attached Figure 1 -Attached Figure 5 The corresponding relationship of the parts is as follows:

[0026] 1. Hemodialysis catheter; 11. Connector; 12. Cannula; 13. Blood outlet tube; 14. Interface; 15. Blood inlet tube; 2. Blood sample filter; 21. Tank; 22. Ring; 23. Liquid inlet port; 24. Blood semipermeable membrane; 25. Liquid outlet port; 26. Sleeve; 27. Insert rod; 28. Silicone cylinder; 3. Negative pressure blood extraction component; 31. Negative pressure cylinder; 32. Clamp; 33. Guide tube; 34. Rubber movable plug; 35. Pull rod; 4. Blood sample storage component; 41. Syringe; 42. Needle plug; 43. Needle stem; 44. Piston; 45. Piston rod. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In order to more clearly explain and illustrate the technical solution and implementation of the present invention, several preferred specific embodiments for implementing the technical solution of the present invention are introduced below.

[0029] Embodiment, a better technical solution of a blood collection device for nursing care.

[0030] Refer to the instruction manual Figure 1 As shown: it includes a hemodialysis catheter 1, the rear end of the hemodialysis catheter 1 is connected to a blood sample filter 2, a negative pressure blood extraction component 3 is fixed on the right side wall of the blood sample filter 2, and a blood sample storage component 4 is arranged at the rear end of the blood sample filter 2;

[0031] Refer to the instruction manual Figure 2 As shown: the hemodialysis catheter 1 includes a connecting joint 11, a cannula 12 fixedly connected to the front end port of the connecting joint 11, and a blood outlet tube 13 and a blood inlet tube 15 fixedly connected to the two rear ends of the connecting joint 11, and the rear ends of the blood outlet tube 13 and the blood inlet tube 15 are both connected to an interface 14;

[0032] Refer to the instruction manual Figure 3As shown: the blood sample filter 2 includes a tank body 21, a collar 22 fixed in the inner cavity of the tank body 21, and a blood semipermeable membrane 24 fixedly connected to the inner ring of the collar 22, and the front end of the tank body 21 is fixedly connected to a liquid inlet port 23, the rear end of the tank body 21 is fixedly connected to a liquid outlet port 25, and a sleeve 26 is sleeved on the outer ring surface of the liquid outlet port 25; wherein the blood semipermeable membrane 24 divides the inner cavity space of the tank body 21 into two parts, front and rear; The pore size of the blood semipermeable membrane 24 is 5-20 nanometers.

[0033] Refer to the instruction manual Figure 4 As shown: the negative pressure blood extraction device 3 includes a negative pressure cylinder 31, a rubber movable plug 34 movably arranged in the inner cavity of the negative pressure cylinder 31, and a guide tube 33 connected to the front end of the negative pressure cylinder 31, and the end of the guide tube 33 away from the negative pressure cylinder 31 is inserted into the front side space of the inner cavity of the tank body 21;

[0034] Refer to the instruction manual Figure 5 As shown, the blood sample storage unit 4 includes a syringe 41, a needle plug 42 clamped at the front end of the syringe 41, and a needle stem 43 fixedly connected to the front end of the needle plug 42, and a piston 44 is movably arranged in the inner cavity of the syringe 41.

[0035] Refer to the instruction manual Figure 2 As shown: the pointed end of the cannula 12 away from the connecting joint 11 is inserted into the patient's body, and two bayonet sockets for connecting the blood outlet tube 13 and the blood inlet tube 15 are provided on the rear end face of the connecting joint 11, wherein the interface 14 at the rear end of the blood outlet tube 13 is inserted into the front end port of the liquid inlet port 23; the front end head of the liquid inlet port 23 is provided with a bayonet socket for clamping with the interface 14, and a circular hole for inserting the needle stem 43 is provided on the rear end face of the liquid outlet port 25, and the inside of the circular hole is filled and fixed with a sealing ring.

[0036] Refer to the instruction manual Figure 3 As shown: a silicone cylinder 28 is plugged in the rear end port of the sleeve 26, and a plug rod 27 is fixedly connected to the front end surface of the silicone cylinder 28. The section of the plug rod 27 away from the silicone cylinder 28 is inserted into the circular hole at the rear end of the liquid outlet port 25, and the outer ring surface of the plug rod 27 is in close contact with the inner ring of the sealing ring inside the liquid outlet port 25. A plurality of circles of sealing gaskets are fixed on the outer ring surface of the silicone cylinder 28 by adhesive. A bayonet is provided inside the front end port of the sleeve 26, and a block is provided on the outer ring surface of the liquid outlet port 25.

[0037] Refer to the instruction manual Figure 4As shown: one end of the guide tube 33 that penetrates into the inner cavity of the tank body 21 is flush with the inner cavity side wall of the tank body 21, and the end of the guide tube 33 located in the tank body 21 is located in front of the blood semi-permeable membrane 24; two clamps 32 are fixed on the outer ring surface of the negative pressure cylinder 31 and the outer ring surface of the tank body 21, and a support rod is fixedly connected to the side surface of the clamps 32 that are close to each other, and a pull rod 35 that penetrates the outside of the negative pressure cylinder 31 is fixedly connected to the rear end surface of the rubber movable plug 34.

[0038] Refer to the instruction manual Figure 5 As shown: the end of the needle stem 43 away from the needle plug 42 is inserted into the liquid outlet port 25 and the inner cavity of the tank body 21, and there is a distance of 2.0mm-5.0mm between the front end of the needle stem 43 and the rear surface of the blood semipermeable membrane 24 after it is fully inserted; the rear end face of the piston 44 is fixedly connected to a piston rod 45 that penetrates the outside of the syringe 41, and a circle of sealing ring is fixed on the outer surface of the piston 44 by adhesive.

[0039] According to the above-mentioned preferred technical solution, the workflow of the technical solution is described as follows:

[0040] Before or during hemodialysis, the interface 14 at the rear end of the blood outlet tube 13 is inserted into the liquid inlet port 23, and the silicone cylinder 28 is pulled out from the sleeve 26, and the insertion rod 27 is then pulled out from the circular hole inside the liquid outlet port 25, and the needle stem 43 at the front end of the needle plug 42 is inserted into the circular hole inside the liquid outlet port 25. The air inside the negative pressure cylinder 31 is extracted by the pull rod 35 and the rubber active plug 34. After negative pressure is formed inside the negative pressure cylinder 31, blood enters the front side space of the inner cavity of the tank body 21 along the cannula 12 and the blood outlet tube 13. Since the tank body 21 is made of transparent material, after 70%-90% of the blood is present in the front area of ​​the inner cavity of the tank body 21. The blood in the front area of ​​the inner cavity of the tank body 21 is extracted by using the piston 44 and the piston rod 45. The blood passes through the blood semipermeable membrane 24 under the greater negative pressure formed by the blood sample storage unit 4. The blood semipermeable membrane 24 filters the physiological saline or heparin, so that the amount of physiological saline or heparin in the blood entering the rear area of ​​the inner cavity of the tank body 21 is reduced. The extracted blood will be stored in the syringe 41 for testing.

[0041] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone should be aware that any structural changes made under the inspiration of the present invention, and any technical solutions that are the same or similar to the present invention, fall within the protection scope of the present invention. Finally, it should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the restrictive conditions that can be implemented in this application, so they have no technical substantive significance. Any structural modification, change in proportional relationship or adjustment of size, without affecting the effects that can be produced by this application and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in this application.

Claims

1. A blood collection device for nursing use, comprising a hemodialysis catheter (1), characterized in that: The rear end of the hemodialysis catheter (1) is connected to a blood sample filter (2), a negative pressure blood extraction component (3) is fixed on the right side wall of the blood sample filter (2), and a blood sample storage component (4) is provided at the rear end of the blood sample filter (2); The hemodialysis catheter component (1) comprises a connecting joint (11), a cannula (12) fixedly connected to the front end port of the connecting joint (11), and a blood outlet tube (13) and a blood inlet tube (15) fixedly connected to two rear end ports of the connecting joint (11), and the rear end ports of the blood outlet tube (13) and the blood inlet tube (15) are both connected to interfaces (14); The blood sample filter (2) comprises a tank body (21), a collar (22) fixed in the inner cavity of the tank body (21), and a blood semipermeable membrane (24) fixedly connected to the inner ring of the collar (22), and the front end of the tank body (21) is fixedly connected to a liquid inlet port (23), the rear end of the tank body (21) is fixedly connected to a liquid outlet port (25), and a sleeve (26) is sleeved on the outer ring surface of the liquid outlet port (25); wherein the blood semipermeable membrane (24) divides the inner cavity space of the tank body (21) into two parts, front and rear. The negative pressure blood extraction device (3) comprises a negative pressure cylinder (31), a rubber movable plug (34) movably arranged in the inner cavity of the negative pressure cylinder (31), and a guide tube (33) connected to the front end port of the negative pressure cylinder (31), wherein one end of the guide tube (33) away from the negative pressure cylinder (31) penetrates and is inserted into the front side space of the inner cavity of the tank body (21); The blood sample storage element (4) comprises a syringe (41), a needle plug (42) clamped at the front end of the syringe (41), and a needle stem (43) fixedly connected to the front end of the needle plug (42), and a piston (44) is movably arranged in the inner cavity of the syringe (41).

2. A blood collection device for nursing care according to claim 1, characterized in that: The tip of the cannula (12) at one end away from the connecting joint (11) is inserted into the patient's body, and two bayonet holes for connecting the blood outlet tube (13) and the blood inlet tube (15) are provided on the rear end surface of the connecting joint (11), wherein the interface (14) at the rear end of the blood outlet tube (13) is inserted into the front end port of the liquid inlet port (23).

3. A blood collection device for nursing care according to claim 1, characterized in that: The front end of the liquid inlet port (23) is provided with a snap-fit ​​socket for engaging with the interface (14), and the rear end surface of the liquid outlet port (25) is provided with a circular hole for inserting the needle stem (43), and a sealing ring is filled and fixed inside the circular hole.

4. A blood collection device for nursing care according to claim 1, characterized in that: A silicone cylinder (28) is plugged into the rear end port of the sleeve (26), and an insertion rod (27) is fixedly connected to the front end surface of the silicone cylinder (28). The section of the insertion rod (27) away from the silicone cylinder (28) is inserted into the circular hole at the rear end of the liquid outlet port (25), and the outer ring surface of the insertion rod (27) is in close contact with the inner ring of the sealing ring inside the liquid outlet port (25).

5. A blood collection device for nursing care according to claim 1, characterized in that: A plurality of sealing gaskets are fixed on the outer ring surface of the silicone cylinder (28) by adhesive, a bayonet is provided inside the front end port of the sleeve (26), and a clamping block is provided on the outer ring surface of the liquid outlet port (25).

6. A blood collection device for nursing use according to claim 1, characterized in that: One end of the guide tube (33) that penetrates into the inner cavity of the tank body (21) is flush with the inner cavity side wall of the tank body (21), and the end of the guide tube (33) located inside the tank body (21) is located in front of the blood semipermeable membrane (24).

7. A blood collection device for nursing care according to claim 1, characterized in that: Two clamps (32) are fixed on the outer ring surface of the negative pressure cylinder (31) and the outer ring surface of the tank body (21), and a support rod is fixedly connected to the surfaces of the clamps (32) on one side close to each other.

8. A blood collection device for nursing care according to claim 1, characterized in that: A pull rod (35) that penetrates the outside of the negative pressure cylinder (31) is fixedly connected to the rear end surface of the rubber movable plug (34).

9. The blood collection device for nursing care according to claim 1, characterized in that: The end of the needle stem (43) away from the needle plug (42) is inserted into the liquid outlet port (25) and the inner cavity of the tank body (21), and a distance of 2.0 mm to 5.0 mm is provided between the front end of the needle stem (43) after it is fully inserted and the rear surface of the blood semipermeable membrane (24).

10. The blood collection device for nursing care according to claim 1, characterized in that: The rear end surface of the piston (44) is fixedly connected to a piston rod (45) that penetrates the outside of the syringe (41), and a sealing ring is fixed to the outer surface of the piston (44) by adhesive.

Images