Disposable blood sampling bag with detachable and replaceable puncture needle head

Abstract

The utility model relates to the technical field of blood collection bags, and discloses a disposable blood collection bag with a detachable puncture needle head, which comprises a blood bag, the front end of the blood bag is communicated with a blood collection tube, and the blood collection tube is provided with a flow control valve, a three-way connector and the puncture needle head; the replacement fixing mechanism is arranged at the end part of the blood collection tube and comprises a mounting ring; the puncture needle head is preliminarily positioned on the blood collection tube through the mounting block, the puncture needle head is stably mounted on the blood collection tube through the screw rod and the positioning frame, so that the puncture needle head is prevented from shifting in the puncture blood collection process, the blood collection effect is ensured, and the positioning frame is far away from the mounting block through the screw rod; the puncture needle head on the disposable blood sampling bag is easy to disassemble and assemble, a new puncture needle head is convenient to replace, then the infection risk of secondary puncture blood sampling is reduced, and the practicability of using the disposable blood sampling bag is improved; the problem that in the prior art, a puncture needle head cannot be fixed and replaced in time according to use requirements is solved.

Description

Technical Field

[0001] The utility model patent belongs to the technical field of blood collection bags, and specifically relates to a disposable blood collection bag with a detachable puncture needle. Background Art

[0002] Disposable plastic blood collection bags are essential containers for the collection, storage, and processing of blood and blood components. They are widely used in the medical field for blood collection and preservation. They are widely used in blood collection and supply institutions, street blood donations, and biological experiments. Their structure usually consists of a blood collection bag body, a puncture needle, a sealer to prevent blood spillage, an anticoagulant, and appropriate additives. When in use, the puncture needle is used to puncture the blood vessel of the blood donor, the blood collection bag body is pumped to negative pressure, and then blood is collected from the blood donor.

[0003] For example, a Chinese utility model patent with authorization announcement number CN219090254U discloses a disposable blood collection bag with a detachable side bag, including a blood storage bag, a blood collection needle, a catheter, a switch and a disassembly component, wherein the disassembly component includes a side bag, a first spiral joint and a spiral cover. When collecting blood, the side bag is connected to the spiral cover through the first spiral joint, and the collected blood first flows into the side bag, and the subsequent blood is stored in the blood storage bag. The side bag is used to collect specimens; when in use, when the side bag cannot be used normally by accident, it can be disassembled and replaced through the spiral joint and the spiral cover: for example, the sampling needle of the side bag is blocked, there is blood coagulation in the side bag, and the blood maintenance solution accidentally enters the side bag; by realizing the detachable side bag, the successful and effective collection of nucleic acid and enzyme-immunoassay specimens can be ensured, and abnormal specimens caused by abnormal conditions can be avoided, blood waste can be reduced, and adverse effects on blood donors and blood collectors can be reduced; however, when the disposable blood collection bag as described above is used, there are still problems such as:

[0004] The above-mentioned blood collection bag is not provided with a corresponding replacement device when in use, so the puncture needle cannot be effectively replaced according to the use requirements during use, which makes it easy to cause a series of problems such as cross infection when the blood collection fails and the second puncture occurs, thereby affecting the blood quality and the health of the blood donor;

[0005] Therefore, the utility model designs a disposable blood collection bag with a detachable puncture needle to solve the problems existing in the above-mentioned prior art. Utility Model Content

[0006] 1. Technical issues to be resolved

[0007] In view of the shortcomings of the existing technology, the utility model provides a disposable blood collection bag with a detachable puncture needle, which has the advantages of convenient replacement of the puncture needle and stable installation of the venous puncture needle at the front end of the blood collection tube, etc., and solves the problem that the existing technology cannot fix and replace the puncture needle in time according to the use requirements.

[0008] (II) Technical solution

[0009] In order to achieve the above-mentioned purpose of fixing and replacing the puncture needle in time according to the use requirements, the utility model provides the following technical solutions:

[0010] The utility model relates to a disposable blood collection bag with a detachable puncture needle.

[0011] As a preferred solution of the disposable blood collection bag with a detachable puncture needle of the utility model, it comprises: a blood bag, the front end of which is connected to a blood collection tube, a flow control valve and a three-way joint are arranged on the pipeline of the blood collection tube, and a puncture needle is arranged at one end of the blood collection tube;

[0012] The replacement fixing mechanism is arranged at the free end of the blood collection tube and is matched with the puncture needle, and comprises a mounting ring, and the mounting ring is matched with the positioning frame arranged at the end of the blood collection tube;

[0013] Based on the above technical features: the mounting ring is fixedly mounted on the puncture needle, and then the mounting ring is connected to the positioning frame to achieve mounting the puncture needle on the blood collection tube, and the puncture needle can be replaced according to needs.

[0014] As a preferred solution of the disposable blood collection bag with a detachable puncture needle of the utility model: the upper and lower ends of the mounting ring surface are both provided with mounting blocks, the positioning frame is a U-shaped structure movably arranged in the blood collection tube, and the plug plates arranged on the upper and lower sides of the positioning frame are adapted to the friction groove arranged on the blood collection tube and the dovetail groove arranged on the mounting block, and the limiting horizontal plate arranged between the two plug plates is adapted to the limiting surface arranged on the mounting ring;

[0015] Based on the above technical features: through the mounting block, the puncture needle is initially positioned on the blood collection tube, and through the screw rod and the positioning frame, the puncture needle is stably installed on the blood collection tube, thereby ensuring that the puncture needle will not shift during puncture and blood collection, thereby ensuring the blood collection effect, and through the screw rod, the positioning frame is away from the mounting block, and the disassembly and assembly of the puncture needle on the disposable blood collection bag is simple, which is convenient for replacing a new puncture needle, thereby reducing the infection risk of secondary puncture and blood collection, and improving the practicality of using disposable blood collection bags.

[0016] As a preferred solution of the disposable blood collection bag with a detachable puncture needle of the utility model: a puncture needle connection assembly is also movably arranged in the mounting ring, and the puncture needle connection assembly is symmetrically arranged in the mounting ring, including a pull handle movably arranged on the mounting ring, a pull handle is arranged at the outer end of the pull handle, and a clamping block is arranged at the inner end, the clamping block is adapted to the puncture needle, and a spring is also arranged between two adjacent clamping blocks;

[0017] Based on the above technical features: by manually pulling the handle, the two adjacent clamping blocks are moved away from each other, the spring is stretched, and then the tail end of the puncture needle is clamped between the two clamping blocks. The pulling handle is released, so that the two clamping blocks are moved closer to each other under the action of the spring, which is convenient for replacing and fixing the puncture needle.

[0018] As a preferred solution of the disposable blood collection bag with a detachable puncture needle of the utility model: the clamping block is also provided with a plurality of card slots, and the card slots are adapted to the puncture needle;

[0019] Based on the above technical features: the puncture needle can be clamped and fixed by setting the card slot.

[0020] As a preferred solution of the disposable blood collection bag with a detachable puncture needle of the utility model: a screw rod is also threadedly connected in the blood collection tube, and the limit horizontal plate is rotatably connected to the screw rod;

[0021] Based on the above technical features: the position of the positioning frame on the blood collection tube is adjusted by rotating the screw rod to fix the mounting ring as needed.

[0022] As a preferred solution of the disposable blood collection bag with a detachable puncture needle of the utility model: the plug plate is also provided with a slot, and the slot is adapted to the limiting magnet provided in the blood collection tube;

[0023] Based on the above technical features: the adjustment direction of the positioning frame is guided and limited by the limiting magnet stuck in the slot.

[0024] As a preferred solution of the disposable blood collection bag with a detachable puncture needle of the utility model: a sealing member is also provided in the blood collection tube, and one end of the puncture needle is slidably connected in the sealing member;

[0025] Based on the above technical features: the inner side of the seal is wrapped around the surface of the puncture needle so that the puncture needle is tightly connected to the blood collection tube to avoid liquid leakage or air leakage during use.

[0026] (III) Beneficial effects

[0027] Compared with the prior art, the utility model provides a disposable blood collection bag with a detachable puncture needle, which has the following beneficial effects:

[0028] 1. Through the setting of the mounting block, the puncture needle is initially positioned on the blood collection tube. Through the screw rod and the positioning frame, the puncture needle is stably installed on the blood collection tube, thereby ensuring that the puncture needle will not shift during puncture and blood collection, ensuring the blood collection effect. Through the screw rod, the positioning frame is far away from the mounting block. The puncture needle on the disposable blood collection bag is easy to disassemble and install, and it is convenient to replace the new puncture needle, thereby reducing the infection risk of secondary puncture and blood collection, and improving the practicality of using disposable blood collection bags;

[0029] 2. Through the setting of the limiting magnet and the positioning frame, the positioning frame is stably connected to the mounting block, which ensures the stability of the puncture needle installed on the front end of the blood collection tube, thereby ensuring the puncture effect of the puncture needle on the user and reducing the discomfort of the user in using a disposable blood bag;

[0030] 3. Through the setting of the puncture needle connecting assembly, the effect of rapid installation and fixation of puncture needles of different sizes and specifications is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the overall structure of the disposable blood collection bag with a detachable puncture needle of the utility model;

[0032] Figure 2 It is a cross-sectional view of the blood collection tube of the utility model;

[0033] Figure 3 This is a schematic diagram of the structure of the utility model blood collection tube;

[0034] Figure 4 For this utility model Figure 2 A partial enlarged view of the middle A;

[0035] Figure 5 It is a cross-sectional view of the mounting ring of the utility model;

[0036] Figure 6 This is a schematic diagram of the structure of the clamping block of the utility model;

[0037] Figure 7 For this utility model Figure 2 A partial enlarged view of point B in the middle;

[0038] Figure 8 This is a schematic diagram of the structure of the positioning frame of the utility model;

[0039] Fig. 9 This is a schematic diagram of the structure of the sealing member of the utility model;

[0040] Fig.10 It is a cross-sectional view of the rubber seal of the utility model.

[0041] In the figure: 1. blood bag; 2. blood collection tube; 3. puncture needle; 4. replacement fixing mechanism; 41. mounting ring; 42. mounting block; 43. positioning frame, 431. plug plate; 432. limit horizontal plate; 433. slot; 44. screw rod; 45. limit magnet; 46. limit surface; 47. seal; 48. puncture needle connecting assembly; 481. pull handle; 482. pull rod; 483. clamping block; 484. spring; 485. slot; 49. friction groove; 5. flow control valve; 6. three-way connector. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0043] Example 1: Please refer to Figure 1-10 , the utility model provides a technical solution:

[0044] A disposable blood collection bag with a detachable puncture needle, comprising:

[0045] A blood bag 1, wherein the front end of the blood bag 1 is connected to a blood collection tube 2, a flow control valve 5 and a three-way connector 6 are respectively provided on the pipeline of the blood collection tube 2, and a puncture needle 3 is detachably installed at one end of the blood collection tube 2;

[0046] A replacement fixing mechanism 4, which is arranged at the free end of the blood collection tube 2 and is used in conjunction with the puncture needle 3 to fix the puncture needle 3, and includes a mounting ring 41 fixedly mounted on the surface of the puncture needle 3, and the mounting ring 41 is used in conjunction with a positioning frame 43 installed at the end of the blood collection tube 2;

[0047] Specifically, when in use, the mounting ring 41 is fixedly mounted on the puncture needle 3, and then the mounting ring 41 is connected to the positioning frame 43 to achieve the installation of the puncture needle 3 on the blood collection tube 2, and the puncture needle 3 can be replaced as needed; at the same time, the flow control valve 5 and the three-way connector 6 can be used to control the blood flow through the blood collection tube 2 and to discharge the air in the blood collection tube 2.

[0048] As a preferred embodiment, Figure 3 , Figure 4 , Figure 7 and Figure 8As shown, the upper and lower ends of the surface of the mounting ring 41 are fixedly connected with the mounting block 42, the positioning frame 43 is movably arranged in the blood collection tube 2, the positioning frame 43 is a U-shaped structure, and the plug plates 431 arranged on the upper and lower sides of the positioning frame 43 cooperate with the friction groove 49 arranged on the blood collection tube 2 and the dovetail groove arranged on the mounting block 42, and the limiting horizontal plate 432 arranged between the two plug plates 431 cooperates with the limiting surface 46 arranged on the mounting ring 41;

[0049] Specifically, when in use, the position of the positioning frame 43 on the blood collection tube 2 is adjusted so that the plug plate 431 is inserted into the dovetail groove, and the limiting cross plate 432 acts on the limiting surface 46 to connect and fix the mounting ring 41, while preventing the mounting ring 41 from rotating after installation.

[0050] As a preferred embodiment, Figure 4 and Figure 5 As shown, a puncture needle connection assembly 48 is also movably arranged in the mounting ring 41, and the puncture needle connection assembly 48 is symmetrically arranged in the mounting ring 41, including a pull handle 481, a pull rod 482, a clamping block 483 and a spring 484; wherein the pull handle 481 is arranged at the outer end of the pull rod 482, the pull rod 482 is movably arranged on the mounting ring 41, the clamping block 483 is movably arranged at the inner end of the pull rod 482, and a plurality of slots 485 are arranged on the clamping block 483 for use with the puncture needle 3, and the spring 484 is symmetrically arranged between two adjacent clamping blocks 483 and is always in a compressed state;

[0051] Specifically, when in use, the handle 481 is manually pulled to move the two adjacent clamping blocks 483 away from each other, the spring 484 is stretched, and then the tail end of the puncture needle 3 is clamped between the two clamping blocks 483, and the pulling handle 481 is released, so that the two clamping blocks 483 are close to each other under the action of the spring 484, and the puncture needle 3 is clamped and fixed using the slot 485.

[0052] As a preferred embodiment, Figure 7 As shown, a screw rod 44 is also threadedly connected in the blood collection tube 2, and the limit horizontal plate 432 is rotatably connected to the screw rod 44;

[0053] Specifically, when in use, the position of the positioning frame 43 on the blood collection tube 2 is adjusted by rotating the screw rod 44 to fix the mounting ring 41 as needed.

[0054] As a preferred embodiment, Figure 6 As shown, the plug plate 431 is also provided with a slot 433, and the slot 433 is used in conjunction with a limiting magnet 45 provided in the blood collection tube 2;

[0055] Specifically, when in use, the limiting magnet 45 is stuck in the slot 433 to guide and limit the adjustment direction of the positioning frame 43.

[0056] As a preferred embodiment, Figure 4 , Fig. 9 and Fig.10 As shown, the inner wall of the blood collection tube 2 is fixedly connected with a sealing member 47, one end of the puncture needle 3 is slidably connected to the inner wall of the sealing member 47, and the sealing member 47 is a medical silicone member, and the sealing member 47 is a one-way sealing structure;

[0057] Specifically, when in use, the inner side of the seal 47 is wrapped around the surface of the puncture needle 3, so that the puncture needle 3 is tightly connected to the blood collection tube 2 to avoid leakage or air leakage during use; at the same time, when the puncture needle 3 is not inserted, the seal 47 can seal the blood collection tube 2 to avoid blood outflow during the process of changing the puncture needle 3.

[0058] When the disposable blood collection bag with a detachable puncture needle of the utility model is used:

[0059] When blood sampling is required for the user, the blood sampling tube 2 is installed on the blood bag 1, the negative pressure device is connected and installed with the blood bag 1, the blood sampling tube 2 is picked up, and the puncture needle 3 punctures the user's skin to collect blood.

[0060] During the blood collection process, when the puncture needle 3 does not puncture the user's blood vessel or the puncture needle 3 is damaged, in order to avoid cross infection, the flow control valve 5 is used to close the pipeline of the blood collection tube 2, and the puncture needle 3 is moved away from the user's skin. The screw rod 44 is rotated to make the positioning frame 43 away from the mounting block 42, and the mounting ring 41 is pulled to move the used puncture needle 3 away from the front end of the blood collection tube 2. At this time, the sealing member 47 automatically seals the blood collection tube 2 to seal the puncture needle 3 that needs to be replaced. After the replacement is completed, the puncture needle 3 to be used is clamped on the front end of the blood collection tube 2 so that the mounting block 42 is clamped in the blood collection tube 2, and the screw rod 44 is rotated to make the positioning frame 43 clamped in the mounting block 42, so that the limiting magnet 45 limits the positioning frame 43, so that the puncture needle 3 can be stably installed in the blood collection tube 2, thereby avoiding the adhesion of blood stains on the used puncture needle 3 and re-entering the user's body to cause infection. At this time, the puncture needle 3 to be used punctures the user's skin and blood vessels to generate negative pressure in the blood bag 1, and the blood is introduced into the blood bag 1 through the blood collection tube 2 in a safe and sterile manner. After a certain amount of blood is collected, the negative pressure device is turned off and the puncture needle 3 is pulled out to seal the blood bag 1.

[0061] It should be noted that the blood bag 1, blood collection tube 2, puncture needle 3, limiting magnet 45 and seal 47 in the above description are all relatively mature devices in the existing technology. The specific models can be selected according to actual needs and will not be described in detail here.

[0062] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0063] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A disposable blood collection bag with a detachable puncture needle, characterized in that: include: A blood bag (1), wherein the front end of the blood bag (1) is connected to a blood collection tube (2), a flow control valve (5) and a three-way connector (6) are provided on the pipeline of the blood collection tube (2), and a puncture needle (3) is provided at one end of the blood collection tube (2); The replacement fixing mechanism (4) is arranged at the free end of the blood collection tube (2) and is matched with the puncture needle (3), and comprises a mounting ring (41), wherein the mounting ring (41) is matched with a positioning frame (43) arranged at the end of the blood collection tube (2).

2. A disposable blood collection bag with a detachable puncture needle as claimed in claim 1, characterized in that: Mounting blocks (42) are provided on both upper and lower ends of the surface of the mounting ring (41); the positioning frame (43) is a U-shaped structure movably arranged in the blood sampling tube (2); and the plug plates (431) arranged on the upper and lower sides of the positioning frame (43) are matched with the friction groove (49) arranged on the blood sampling tube (2) and the dovetail groove arranged on the mounting block (42); and the limiting horizontal plate (432) arranged between the two plug plates (431) is matched with the limiting surface (46) arranged on the mounting ring (41).

3. A disposable blood collection bag with a detachable puncture needle as claimed in claim 1, characterized in that: A puncture needle connecting assembly (48) is also movably arranged in the mounting ring (41). The puncture needle connecting assembly (48) is symmetrically arranged in the mounting ring (41), and includes a pull handle (481) movably arranged on the mounting ring (41). The pull handle (481) is provided at the outer end thereof and a clamping block (483) is provided at the inner end thereof. The clamping block (483) is adapted to the puncture needle (3), and a spring (484) is also provided between two adjacent clamping blocks (483).

4. A disposable blood collection bag with a detachable puncture needle as claimed in claim 3, characterized in that: The clamping block (483) is also provided with a plurality of slots (485), and the slots (485) are adapted to fit the puncture needle (3).

5. A disposable blood collection bag with a detachable puncture needle as claimed in claim 2, characterized in that: A screw rod (44) is also threadedly connected inside the blood collection tube (2), and the limiting horizontal plate (432) is rotatably connected to the screw rod (44).

6. A disposable blood collection bag with a detachable puncture needle as claimed in claim 2, characterized in that: The plug plate (431) is also provided with a slot (433), and the slot (433) is adapted to be matched with a limiting magnet (45) provided in the blood collection tube (2).

7. A disposable blood collection bag with a detachable puncture needle as claimed in claim 2, characterized in that: A sealing member (47) is also provided in the blood collection tube (2), and one end of the puncture needle (3) is slidably connected in the sealing member (47).

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