Blood collector of blood vessel access blood collection device and blood vessel access blood collection device

Abstract

The utility model discloses a blood collection device of a blood vessel access blood collection device and the blood vessel access blood collection device, and relates to the technical field of medical instruments, and the blood collection device comprises a barrel, a piston assembly, an elastic piece and an operation assembly. The cylinder is provided with an inner cavity. The piston assembly comprises a piston body and a linkage rod, the linkage rod is movably arranged in the barrel, and the piston body pumps blood into the inner cavity through the blood sampling pipeline in the process of moving from the second position to the first position; the elastic piece is used for enabling the piston body to have a trend of moving from the second position to the first position; the operating assembly is movably connected to the cylinder and can be positioned on the cylinder, and the operating assembly is used for driving the piston body to move from the first position until the piston body is positioned at the second position, so that the elastic piece is elastically deformed, and the operating assembly is used for triggering the elastic piece to reset, so that the piston body moves from the second position to the first position. The hemostix solves the technical problem that a traditional injector is tedious and strenuous in pulling operation process and not beneficial to blood collection.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and particularly relates to a blood sampler for a vascular access blood sampling device and a vascular access blood sampling device. Background Art

[0002] Currently, in order to reduce the risk of bacterial infection in patients and the probability of medical staff being stabbed by blood sampling needles, blood sampling is often carried out through venous / arterial vascular access.

[0003] In related technologies, the venous / arterial vascular access blood sampling device mainly uses a syringe to achieve the blood sampling function under a closed pipeline. Specifically, the vascular access blood sampling device includes components such as a blood sampling catheter, a three-way valve, and a syringe. During operation, the three-way valve is toggled to connect the piston to the vascular access, and the syringe is pulled to create a vacuum so that the diluted blood flows into the syringe. Blood sampling is performed at the blood sampling valve at the front end of the syringe, and after blood sampling, the diluted blood is pushed back into the patient's body.

[0004] However, the current vascular access blood sampling device uses a traditional syringe to create a vacuum for blood sampling. Since the syringe needs to ensure a uniform pulling speed during the vacuum creation operation to avoid negative pressure in the blood vessel caused by too fast pulling, which prevents blood from flowing out, and at the same time, the pulling process is relatively cumbersome and laborious, this will increase the complexity of the operation for medical staff and is not conducive to blood sampling operations. Summary of the Utility Model

[0005] The purpose of the present application is to provide a blood sampler for a vascular access blood sampling device and a vascular access blood sampling device, which solves the problem that the traditional syringe pulling operation process is cumbersome and laborious and is not conducive to blood sampling operations.

[0006] To achieve the above purpose, the present application provides a blood sampler for a vascular access blood sampling device, which is used to connect with a blood sampling pipeline. The blood sampler includes:

[0007] A cylinder body, the cylinder body has an inner cavity, the inner cavity is communicated with the blood sampling pipeline, and the inner cavity is used to accommodate the extracted blood;

[0008] A piston assembly, the piston assembly includes a piston body and a linkage rod connected to the piston body. The linkage rod is movably arranged in the cylinder body, so that the piston body has a first position and a second position in the inner cavity. The piston body is configured to pump blood into the inner cavity through the blood sampling pipeline during the process of moving from the second position to the first position;

[0009] An elastic member, sleeved on the linkage rod, for providing an elastic force to the linkage rod, so that the piston body has a tendency to move from the second position to the first position;

[0010] The operating component is movably connected to the cylinder body and can be positioned on the cylinder body. It is used to drive the piston body to move from the first position until the piston body is positioned at the second position, causing the elastic member to undergo elastic deformation, and is used to trigger the reset of the elastic member so that the piston body moves from the second position to the first position.

[0011] In some embodiments, a first support structure is provided inside the cylinder body, a second support structure is provided on the linkage rod, and two ends of the elastic member respectively abut against the first support structure and the second support structure.

[0012] In some embodiments, the first support structure is a support pad fixed inside the cylinder body or a support seat integrally formed with the cylinder body, and the second support structure is a support platform provided on the linkage rod. The outer diameter of the support platform is larger than the outer diameter of the linkage rod.

[0013] In some embodiments, the operating component is a pressing operating component, and the pressing operating component is movably embedded at one end of the cylinder body away from the piston body.

[0014] In some embodiments, a rolling groove is provided on the inner wall of the cylinder body along the circumferential direction. The rolling groove has a first preset position, a second preset position, and a third preset position. The third preset position is located between the first preset position and the second preset position in the circumferential direction. The height of the third preset position is less than the height of the second preset position, and the height of the second preset position is less than the height of the first preset position;

[0015] An annular groove is provided on the outer wall of the pressing operating component along the circumferential direction;

[0016] The blood collector further includes a positioning ball. The positioning ball is rollably provided in the annular groove and the rolling groove. The positioning ball is configured to move the piston body from the first position to the second position and position it at the second position during the process of moving from the first preset position through the third preset position to the second preset position, and move the piston body from the second position to the first position and position it at the first position during the process of moving from the second preset position through the third preset position to the first preset position.

[0017] In some embodiments, the pressing operating component is provided with a sliding groove. The sliding groove includes a first groove body and a second groove body. A first positioning point is provided at the position where the first end of the first groove body and the second end of the second groove body are connected, and a second positioning point is provided at the position where the second end of the first groove body and the first end of the second groove body are connected;

[0018] The blood collector further includes a positioning latch rod. The bottom end of the positioning latch rod is swingably disposed inside the barrel, and the top end of the positioning latch rod is slidably disposed in the sliding groove. The positioning latch rod is configured such that during the process of sliding from the first positioning point to the second positioning point through the first groove body, the piston body moves from the first position to the second position and is positioned at the second position, and during the process of sliding from the second positioning point to the first positioning point through the second groove body, the piston body moves from the second position to the first position and is positioned at the first position.

[0019] In some embodiments, the operating assembly is a rotary operating assembly, and the rotary operating assembly is rotatably connected to one end of the barrel away from the piston body.

[0020] In some embodiments, a linkage portion is provided at one end of the linkage rod away from the piston body. Either the linkage portion or the barrel is provided with a moving groove, and the other is provided with a moving guide rail. The moving guide rail and the moving groove are movably matched so that the linkage rod moves relative to the barrel;

[0021] The linkage portion is provided with a guiding curved surface. A first positioning groove and a second positioning groove are respectively provided at both ends of the guiding curved surface. The height of the first positioning groove is less than that of the second positioning groove. The rotary operating assembly includes a rotary portion, and the rotary portion is provided with a rotary positioning edge. The rotary positioning edge is configured such that during the process of moving from the first positioning groove to the second positioning groove through the guiding curved surface, the piston body moves from the first position to the second position and is positioned at the second position, and during the process of moving from the second positioning groove to the first positioning groove through the guiding curved surface, the piston body moves from the second position to the first position and is positioned at the first position.

[0022] The present application further provides a blood collection device for a vascular access, including a blood collection line, including the blood collector of the blood collection device for a vascular access according to any one of the above, and the blood collector is connected to the blood collection line.

[0023] In some embodiments, the blood collection device for a vascular access further includes:

[0024] A stop valve, disposed on the blood collection line and on the side of the blood collector close to the blood vessel, for controlling the opening and closing of the blood collection line;

[0025] A heparin cap, disposed on the blood collection line, and the heparin cap is provided with an upward-facing socket;

[0026] Wherein, the stop valve is provided with a switch handle, and the switch handle is used to expose the socket when in the closed state and block the socket when in the open state.

[0027] Compared with the above background art, the blood collection device of the blood vessel access blood collection device provided by the embodiments of the present application is used to connect with a blood collection pipeline. The blood collection device includes a cylinder body, a piston assembly, an elastic member, and an operation assembly. Among them, the cylinder body has an inner cavity, the inner cavity is communicated with the blood collection pipeline, and the inner cavity is used to accommodate the extracted blood; the piston assembly includes a piston body and a linkage rod connected to the piston body, and the linkage rod is movably arranged in the cylinder body, so that the piston body has a first position and a second position in the inner cavity. The piston body is configured to draw blood into the inner cavity through the blood collection pipeline during the process of moving from the second position to the first position; the elastic member is sleeved on the linkage rod, and the elastic member is used to provide an elastic force to the linkage rod, so that the piston body has a tendency to move from the second position to the first position; the operation assembly is movably connected to the cylinder body and can be positioned on the cylinder body. The operation assembly is used to drive the piston body to move from the first position until the piston body is positioned at the second position, so that the elastic member undergoes elastic deformation, and is used to trigger the elastic member to reset, so that the piston body moves from the second position to the first position.

[0028] When blood collection is required, the operation assembly is operated. This operation will release the positioning of the cylinder body on the operation assembly, which will release the elastic member to reset, that is, the elastic member will return from the deformed state to its original shape. The reset of the elastic member releases the stored energy, pushing the piston body to move from the second position to the first position, so as to achieve the purpose of drawing blood into the inner cavity through the blood collection pipeline. After the blood collection is completed, the operation assembly is operated again. The operation assembly drives the linkage rod and the piston body to move until the piston body is positioned at the second position. During this process, the elastic member undergoes elastic deformation, that is, the movement of the linkage rod causes the elastic member to deform. This deformation will cause the elastic member to store energy and be ready to be released in the next step. At the same time, as the piston body moves from the first position to the second position, the blood in the cylinder body can be pushed back into the human body.

[0029] With such a setting, the blood collection device provided by the embodiments of the present application, by operating the operation assembly, the operation assembly can be a pressing operation assembly or a rotating operation assembly, and the elastic member is reset to release energy, so that the piston body automatically moves from the second position to the first position to realize drawing blood into the inner cavity of the cylinder body. Compared with the traditional method of using a syringe for drawing and pulling blood collection, the blood collection device provided by the embodiments of the present application has the following main beneficial effects:

[0030] First, it is easy to achieve semi-automatic blood collection: the above operation process is easy to achieve semi-automatic blood collection, thereby improving the blood collection efficiency and operation consistency;

[0031] Second, the operation is simple: Pressing or rotating operations are usually simpler and more direct. Users can easily complete them through hand movements without performing complex pulling actions.

[0032] Thirdly, low force requirement: Pressing or rotating operations generally do not require much force, which is suitable for users with various physical strength levels, increasing the applicability.

[0033] Fourthly, fast response speed: Pressing or rotating operations can quickly respond to the user's instructions, making the blood collection reaction time of the blood collection device shorter and the operation smoother. Brief Description of the Drawings

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments or related technologies. Obviously, the drawings in the following description are only the embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0035] Figure 1 It is a schematic structural diagram of the first blood collection device in the embodiments of the present application;

[0036] Figure 2 is Figure 1 the unfolded schematic diagram of the rolling groove in;

[0037] Figure 3 It is a schematic structural diagram of the second blood collection device in the embodiments of the present application;

[0038] Figure 4 It is a schematic structural diagram of the third blood collection device in the embodiments of the present application;

[0039] Figure 5 It is a schematic connection diagram of the blood vessel access blood collection device in the embodiments of the present application.

[0040] Wherein:

[0041] 10 - blood collection device, 11 - cylinder body, 111 - rolling groove, 1111 - first preset position, 1112 - second preset position, 1113 - third preset position, 12 - piston assembly, 121 - piston body, 122 - linkage rod, 1221 - linkage part, 12211 - guiding curved surface, 12212 - first positioning groove, 12213 - second positioning groove, 13 - elastic member, 131 - first support structure, 132 - second support structure, 141 - pressing operation assembly, 1411 - annular groove, 1412 - sliding groove, 14121 - first groove body, 14122 - second groove body, 14123 - first positioning point, 14124 - second positioning point, 142 - rotating operation assembly, 1421 - rotating part, 14211 - rotating positioning edge, 15 - positioning ball, 16 - positioning latch;

[0042] 20 - blood collection pipeline;

[0043] 30 - Stop valve, 31 - Switch handle;

[0044] 40 - Heparin cap, 41 - Socket. Detailed implementation manners

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0046] In order to enable those skilled in the art of this technology to better understand the solution of the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0047] It should be noted that the orientation terms such as "upper end, lower end, left side, right side" described below are defined based on the accompanying drawings of the specification.

[0048] Please refer to Figures 1 to 4 , the blood collection device 10 of the vascular access blood collection device provided by the embodiment of the present application is used to connect with the blood collection pipeline 20. The blood collection device 10 includes a cylinder 11, a piston assembly 12, an elastic member 13 and an operation assembly.

[0049] The cylinder 11 has an inner cavity, and the inner cavity communicates with the blood collection pipeline 20. The inner cavity is used to accommodate the blood extracted through the blood collection pipeline 20. Of course, the cylinder 11 is preferably a circular cylinder.

[0050] The piston assembly 12 includes a piston body 121 and a linkage rod 122 connected to the piston body 121. The linkage rod 122 is movably arranged in the cylinder 11, so that the piston body 121 has a first position and a second position in the inner cavity (of course, the first position and the second position can be the top position and the bottom position in the inner cavity respectively). The piston body 121 is configured to pump the blood through the blood collection pipeline 20 into the inner cavity during the process of moving from the second position to the first position. The piston assembly 12 can be an integral structure. Among them, the linkage rod 122 is connected to the center position at the top of the piston body 121, which is beneficial to improving the stability of the up and down movement of the piston body 121.

[0051] The elastic member 13 is sleeved on the linkage rod 122. The elastic member 13 is used to provide an elastic force to the linkage rod 122, so that the piston body 121 has a tendency to move from the second position to the first position. The elastic member 13 is a spring member, and the upper and lower ends of the spring member are respectively connected to the linkage rod 122 and the cylinder 11. In this way, during the process of the piston body 121 moving relative to the cylinder 11, the spring member can undergo elastic deformation and store a certain amount of energy.

[0052] The operating component is movably connected to the cylinder body 11 and can be positioned within the cylinder body 11. Specifically, the operating component can not only move relative to the cylinder body 11, but also be positioned within the cylinder body 11 when the piston body 121 reaches the second position, so as to position the piston body 121 at the second position. The operating component is used to drive the piston body 121 to move from the first position until the piston body 121 is positioned at the second position, causing the elastic member 13 to undergo elastic deformation, and is used to trigger the reset of the elastic member 13, causing the piston body 121 to move from the second position to the first position. The operating component can be a pressing operating component 141 or a rotating operating component 142.

[0053] When blood collection is required, the operating component is operated. This operation will release the positioning of the cylinder body 11 on the operating component, thus releasing the elastic member 13 to reset, that is, causing the elastic member 13 to return from the deformed state to its original shape. The reset of the elastic member 13 releases the stored energy, pushing the piston body 121 to move from the second position to the first position, so as to achieve the purpose of pumping blood through the blood collection pipeline 20 into the inner cavity. After blood collection is completed, the operating component is operated again. The operating component drives the linkage rod 122 and the piston body 121 to move until the piston body 121 is positioned at the second position. During this process, the elastic member 13 undergoes elastic deformation, that is, the movement of the linkage rod 122 causes the elastic member 13 to deform. This deformation will cause the elastic member 13 to store energy and be ready to be released in the next step. At the same time, as the piston body 121 moves from the first position to the second position, the blood in the cylinder body 11 can be pushed back into the human body.

[0054] With such a setting, the blood collection device 10 provided by the embodiment of the present application, by operating the operating component and releasing energy through the reset of the elastic member 13, enables the piston body 121 to automatically move from the second position to the first position, so as to realize pumping blood into the inner cavity of the cylinder body 11. Compared with the traditional method of using a syringe for pulling and collecting blood, the blood collection device 10 provided by the embodiment of the present application has the following main beneficial effects:

[0055] First, it is easy to achieve semi-automatic blood collection: The above operation process is easy to achieve semi-automatic blood collection, thereby improving blood collection efficiency and operation consistency;

[0056] Second, the operation is simple: Pressing or rotating operations are usually simpler and more direct. Users can easily complete them through hand movements without performing complex pulling actions.

[0057] Third, the force requirement is low: Pressing or rotating operations usually do not require much force, which is suitable for users of various physical strength levels and increases applicability.

[0058] Fourth, fast response speed: Pressing or rotating operations can quickly respond to user instructions, making the blood collection reaction time of the blood collector 10 shorter and the operation smoother.

[0059] To facilitate the assembly of the elastic member 13, a first support structure 131 is provided inside the cylinder 11, a second support structure 132 is provided on the linkage rod 122, and both ends of the elastic member 13 respectively abut against the first support structure 131 and the second support structure 132.

[0060] In this way, as the linkage rod 122 moves relative to the cylinder 11, the distance between the second support structure 132 and the first support structure 131 decreases, and the elastic member 13 located between the second support structure 132 and the first support structure 131 undergoes elastic deformation. This deformation causes the elastic member 13 to store elastic energy and prepares to release it in the next step; after the elastic member 13 is released, it can reset, that is, the elastic member 13 returns from the deformed state to its original shape. The reset of the elastic member 13 releases the stored energy and pushes the piston body 121 to move from the second position to the first position, thereby achieving the purpose of pumping blood through the blood collection pipeline 20 into the inner cavity.

[0061] In some embodiments, the first support structure 131 is a support pad fixed inside the cylinder 11, and the second support structure 132 is a support platform provided on the linkage rod 122. The outer diameter of the support platform is larger than the outer diameter of the linkage rod 122. In this way, both ends of the elastic member 13 respectively abut against the support pad and the support platform.

[0062] In some embodiments, the first support structure 131 is a support seat integrally formed with the cylinder 11, and the second support structure 132 is a support platform provided on the linkage rod 122. The outer diameter of the support platform is larger than the outer diameter of the linkage rod 122. In this way, both ends of the elastic member 13 respectively abut against the support seat and the support platform.

[0063] For ease of operation, the above operation assembly can be a pressing operation assembly 141 or a rotating operation assembly 142.

[0064] In some embodiments, the operation assembly is a pressing operation assembly 141, and the pressing operation assembly 141 is movably embedded at one end of the cylinder 11 away from the piston body 121.

[0065] In the normal state, the pressing operation assembly 141 drives the linkage rod 122 and the piston body 121 to move until the piston body 121 is positioned at the second position. During this process, the elastic member 13 undergoes elastic deformation, and this deformation causes the elastic member 13 to store energy and prepares to release it in the next step.

[0066] When blood collection is required, a pressing operation is performed on the pressing operation component 141. This pressing operation will release the positioning of the pressing operation component 141 by the cylinder body 11, thus releasing the elastic member 13 to reset it, that is, making the elastic member 13 return from the deformed state to its original shape. The reset of the elastic member 13 releases the stored energy, pushing the piston body 121 to move from the second position to the first position, so as to achieve the purpose of pumping blood into the inner cavity through the blood collection pipeline 20.

[0067] After blood collection is completed, a pressing operation is performed on the pressing operation component 141 again. The pressing operation component 141 drives the linkage rod 122 and the piston body 121 to move until the piston body 121 is positioned at the second position. During this process, the elastic member 13 undergoes elastic deformation. At the same time, as the piston body 121 moves from the first position to the second position, the blood in the cylinder body 11 can be pushed back into the human body.

[0068] In one embodiment of the pressing operation component 141, please refer to Figure 1 and Figure 2 , the inner wall of the cylinder body 11 is provided with a rolling groove 111 arranged along the circumferential direction. The rolling groove 111 has a first preset position 1111, a second preset position 1112, and a third preset position 1113. The third preset position 1113 is located between the first preset position 1111 and the second preset position 1112 in the circumferential direction. The height of the third preset position 1113 is less than the height of the second preset position 1112, and the height of the second preset position 1112 is less than the height of the first preset position 1111, thus forming a rolling groove 111 along the circumferential direction in a cycle. At the same time, the outer wall of the pressing operation component 141 is provided with an annular groove 1411 arranged along the circumferential direction. In addition, the blood collector 10 further includes a positioning ball 15. The positioning ball 15 is rollably arranged in the annular groove 1411 and the rolling groove 111. The positioning ball 15 is configured to make the piston body 121 move from the first position to the second position and be positioned at the second position during the process of moving from the first preset position 1111 through the third preset position 1113 to the second preset position 1112, and make the piston body 121 move from the second position to the first position and be positioned at the first position during the process of moving from the second preset position 1112 through the third preset position 1113 to the first preset position 1111.

[0069] It should be noted that the first preset position 1111 is the high position, the second preset position 1112 is the sub-high position, and the third preset position 1113 is the low position.

[0070] Specifically, in the normal state, by pressing the pressing operation component 141, the pressing operation component 141 drives the piston body 121 to move from the first position to the second position, the elastic member 13 undergoes elastic deformation, and the positioning ball 15 moves from the high position of the rolling groove 111 to the low position under the limiting action of the annular groove 1411. After releasing the pressing operation component 141, the elastic member 13 releases and pushes the positioning ball 15 from the low position to the sub-high position. At this time, the pressing operation component 141 is positioned on the cylinder body 11, and the piston body 121 is positioned at the second position; when blood collection is required, the pressing operation component 141 is pressed. This pressing operation will release the positioning of the cylinder body 11 on the pressing operation component 141 and release the elastic member 13. Under the elastic force of the elastic member 13, the positioning ball 15 moves from the sub-high position of the rolling groove 111 to the low position. After releasing the pressing operation component 141, the elastic member 13 pushes the positioning ball 15 from the low position to the high position, thereby driving the piston body 121 to move from the second position to the first position to achieve blood collection; after blood collection is completed, the pressing operation component 141 is pressed again. The pressing operation component 141 drives the piston body 121 to move from the first position to the second position, the elastic member 13 undergoes elastic deformation, and the positioning ball 15 moves from the high position of the rolling groove 111 to the low position under the limiting action of the annular groove 1411. After releasing the pressing operation component 141, the elastic member 13 releases and pushes the positioning ball 15 from the low position to the sub-high position. At this time, the pressing operation component 141 is positioned on the cylinder body 11, and the piston body 121 is positioned at the second position. During this process, the blood in the cylinder body 11 can be pushed back into the human body.

[0071] In another embodiment of the pressing operation component 141, please refer to Figure 3 , a sliding groove 1412 is provided inside the cylinder body 11. The sliding groove 1412 includes a first groove body 14121 and a second groove body 14122. A first positioning point 14123 is provided at the position where the first end of the first groove body 14121 is connected to the second end of the second groove body 14122, and a second positioning point 14124 is provided at the position where the second end of the first groove body 14121 is connected to the first end of the second groove body 14122.

[0072] In addition, the blood collector 10 further includes a positioning latch 16. The bottom end of the positioning latch 16 is swingably disposed inside the cylinder body 11, and the top end of the positioning latch 16 is slidably disposed in the sliding groove 1412. The positioning latch 16 is configured such that during the process of sliding from the first positioning point 14123 through the first groove body 14121 to the second positioning point 14124, the piston body 121 moves from the first position to the second position and is positioned at the second position, and during the process of sliding from the second positioning point 14124 through the second groove body 14122 to the first positioning point 14123, the piston body 121 moves from the second position to the first position and is positioned at the first position.

[0073] Specifically, in the normal state, by pressing the pressing operation component 141, the pressing operation component 141 drives the piston body 121 to move from the first position to the second position. The elastic member 13 undergoes elastic deformation, and the top end of the positioning latch 16 slides upward from the first positioning point 14123 through the first groove 14121 on the right side to the second positioning point 14124 and is stuck at the second positioning point 14124. At this time, the pressing operation component 141 is positioned on the cylinder body 11, and the piston body 121 is positioned at the second position; when blood collection is required, the pressing operation component 141 is pressed. This pressing operation will release the positioning of the cylinder body 11 on the pressing operation component 141 and release the elastic member 13. Under the elastic force of the elastic member 13, the top end of the positioning latch 16 slides from the second positioning point 14124 through the second groove 14122 on the left side to the first positioning point 14123, causing the piston body 121 to move from the second position to the first position and be positioned at the first position, thereby pushing the piston body 121 from the second position to the first position to achieve blood collection; after blood collection is completed, the pressing operation component 141 is pressed again. The pressing operation component 141 drives the piston body 121 to move from the first position to the second position. The elastic member 13 undergoes elastic deformation, and the top end of the positioning latch 16 slides upward from the first positioning point 14123 through the first groove 14121 on the right side to the second positioning point 14124 and is stuck at the second positioning point 14124. At this time, the pressing operation component 141 is positioned on the cylinder body 11, and the piston body 121 is positioned at the second position. During this process, the blood in the cylinder body 11 can be pushed back into the human body.

[0074] In some embodiments, please refer to Figure 4 , the operation component is a rotary operation component 142, and the rotary operation component 142 is rotatably connected to one end of the cylinder body 11 away from the piston body 121.

[0075] For example, the rotary operation component 142 can be threadedly connected to the cylinder body 11. Specifically, the inner wall of the cylinder body 11 is provided with internal threads, and the outer wall of the rotary operation component 142 is provided with external threads. Through the threaded cooperation of the external threads and the internal threads, the rotary operation component 142 can rotate along the axis of the cylinder body 11, and the rotary operation component 142 can be positioned on the cylinder body 11.

[0076] In this embodiment, a linkage part 1221 is provided at one end of the linkage rod 122 away from the piston body 121. Either the linkage part 1221 or the cylinder body 11 is provided with a moving groove, and the other is provided with a moving guide rail. The moving guide rail and the moving groove are movably matched, so that the linkage rod 122 moves relative to the cylinder body 11. In this way, through the cooperation of the moving guide rail and the moving groove, the movement of the linkage rod 122 is guided to ensure the stability of the movement of the linkage rod 122. In addition, the linkage part 1221 is provided with a guiding curved surface 12211. The two ends of the guiding curved surface 12211 are respectively provided with a first positioning groove 12212 and a second positioning groove 12213. The height of the first positioning groove 12212 is less than the height of the second positioning groove 12213. The rotation operation assembly 142 includes a rotation part 1421. The rotation part 1421 is provided with a rotation positioning edge 14211. The rotation positioning edge 14211 is configured to move the piston body 121 from the first position to the second position and be positioned at the second position during the process of moving from the first positioning groove 12212 to the second positioning groove 12213 through the guiding curved surface 12211, and move the piston body 121 from the second position to the first position and be positioned at the first position during the process of moving from the second positioning groove 12213 to the first positioning groove 12213 through the guiding curved surface 12211.

[0077] Specifically, in the normal state, by rotating the rotation operation component 142, the rotation operation component 142 drives the piston body 121 to move from the first position to the second position. The elastic member 13 undergoes elastic deformation, and the rotation positioning edge 14211 of the rotation part 1421 moves from the first positioning groove 12212 through the guiding curved surface 12211 to the second positioning groove 12213 and is stuck in the second positioning groove 12213. At this time, the rotation operation component 142 is positioned on the cylinder body 11, and the piston body 121 is positioned at the second position. When blood collection is required, rotate the rotation operation component 142. This rotation operation will release the positioning of the cylinder body 11 on the rotation operation component 142 and release the elastic member 13. Under the elastic force of the elastic member 13, the rotation positioning edge 14211 of the rotation part 1421 moves from the second positioning groove 12213 through the guiding curved surface 12211 to the first positioning groove 12212 and is stuck in the first positioning groove 12212, so that the piston body 121 moves from the second position to the first position and is positioned at the first position, thereby pushing the piston body 121 from the second position to the first position to achieve blood collection. After blood collection is completed, rotate the rotation operation component 142 again. The rotation operation component 142 drives the piston body 121 to move from the first position to the second position. The elastic member 13 undergoes elastic deformation, and the rotation positioning edge 14211 of the rotation part 1421 moves from the first positioning groove 12212 through the guiding curved surface 12211 to the second positioning groove 12213 and is stuck in the second positioning groove 12213. At this time, the rotation operation component 142 is positioned on the cylinder body 11, and the piston body 121 is positioned at the second position. During this process, the blood in the cylinder body 11 can be pushed back into the human body.

[0078] Please refer to Figure 5 , a blood vessel access blood collection device provided by the present application includes a blood collection pipeline 20, and further includes a blood collection device 10 of the blood vessel access blood collection device described in the above specific embodiment. The blood collection device 10 is connected to the blood collection pipeline 20.

[0079] In some embodiments, the blood vessel access blood collection device further includes a stop valve 30 and a heparin cap 40. Among them, the stop valve 30 is provided on the blood collection pipeline 20. The stop valve 30 is located on the side of the blood collection device 10 close to the human blood vessel. The stop valve 30 is used to control the opening and closing of the blood collection pipeline 20. The heparin cap 40 is provided on the blood collection pipeline 20. The heparin cap 40 is provided with an upward-facing socket 41.

[0080] In addition, the stop valve 30 is provided with a switch handle 31. The switch handle 31 is used to expose the socket 41 when in the closed state and block the socket 41 when in the open state.

[0081] During operation, open the stop valve 30 (the switch handle 31 of the stop valve 30 blocks the socket 41 of the heparin cap 40), apply a certain force to the pressing operation component 141 or the rotating operation component 142. The piston body 121 moves from the first position to the second position, and the elastic member 13 undergoes elastic deformation. The pressing operation component 141 or the rotating operation component 142 is positioned on the cylinder 11, and the piston body 121 is positioned at the second position. When a certain force is applied to the pressing operation component 141 or the rotating operation component 142 again, the positioning of the cylinder 11 on the pressing operation component 141 or the rotating operation component 142 will be released, and the elastic member 13 will be released. Under the elastic force of the elastic member 13, the piston body 121 is pushed to move from the second position to the first position to achieve blood collection.

[0082] The blood drawing process includes: after releasing the elastic member 13, the piston body 121 moves from the second position to the first position to draw a vacuum, and the diluted venous / arterial blood enters the cylinder 11. Close the stop valve 30 (the socket 41 of the heparin cap 40 is exposed), draw the middle segment of blood at the heparin cap 40 for testing, and then open the stop valve 30. Compress the piston body 121 to push the venous / arterial blood in the cylinder 11 back into the patient's body.

[0083] Adopting the above semi-automatic operation makes the work of medical staff more concise, labor-saving, safe and effective, and can also avoid some uncertain risks.

[0084] It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any actual relationship or order between these entities.

[0085] The blood collector of the vascular access blood collection device and the vascular access blood collection device provided by the present application have been introduced in detail above. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the solution and its core idea of the present application. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the protection scope of the present application.

Claims

1. A blood sampling device for a vascular access blood sampling device, used to connect to a blood sampling blood line, characterized in that: The blood sampling device comprises: A barrel, the barrel having an inner cavity, the inner cavity being in communication with the blood collection tube, the inner cavity being used to accommodate the drawn blood; A piston assembly, the piston assembly comprising a piston body and a connecting rod connected to the piston body, the connecting rod being movably arranged in the cylinder body so that the piston body has a first position and a second position in the inner cavity, and the piston body is configured to draw blood into the inner cavity through the blood collection tube during the process of moving from the second position to the first position; an elastic member, sleeved on the connecting rod, for providing elastic force to the connecting rod, so that the piston body has a tendency to move from the second position to the first position; An operating component is movably connected to the cylinder and can be positioned on the cylinder, and is used to drive the piston body to move from the first position until the piston body is positioned at the second position so that the elastic member undergoes elastic deformation, and is used to trigger the elastic member to reset so that the piston body moves from the second position to the first position.

2. The blood collection device according to claim 1, characterized in that: A first supporting structure is disposed in the cylinder, a second supporting structure is disposed on the linkage rod, and two ends of the elastic member are respectively in contact with the first supporting structure and the second supporting structure.

3. The blood collection device according to claim 2, characterized in that: The first support structure is a support pad fixed inside the cylinder or a support seat integrally formed with the cylinder, and the second support structure is a support platform arranged on the linkage rod, and the outer diameter of the support platform is larger than the outer diameter of the linkage rod.

4. The blood collection device according to claim 1, characterized in that: The operating assembly is a pressing operating assembly, and the pressing operating assembly is movably embedded in one end of the cylinder away from the piston body.

5. The blood collection device according to claim 4, characterized in that: The inner wall of the cylinder is provided with a rolling groove arranged in the circumferential direction, the rolling groove has a first preset position, a second preset position and a third preset position, the third preset position is located between the first preset position and the second preset position in the circumferential direction, the height of the third preset position is smaller than the height of the second preset position, and the height of the second preset position is smaller than the height of the first preset position; The outer wall of the pressing operation component is provided with an annular groove arranged along the circumferential direction; The blood collector also includes a positioning ball, which is rollably disposed in the annular groove and the rolling groove. The positioning ball is configured to enable the piston body to move from the first position to the second position and be positioned at the second position during the process of moving from the first preset position via the third preset position to the second preset position, and to enable the piston body to move from the second position to the first position and be positioned at the first position during the process of moving from the second preset position via the third preset position to the first preset position.

6. The blood collection device according to claim 4, characterized in that: The pressing operation assembly is provided with a sliding groove, the sliding groove includes a first groove body and a second groove body, a first positioning point is provided at a position where the first end of the first groove body and the second end of the second groove body are connected, and a second positioning point is provided at a position where the second end of the first groove body and the first end of the second groove body are connected; The blood collector also includes a positioning rod, the bottom end of which is swingably disposed in the cylinder, and the top end of which is slidably disposed in the sliding groove. The positioning rod is configured to enable the piston body to move from the first position to the second position and be positioned at the second position during a process of sliding from the first positioning point through the first groove body to the second positioning point, and to enable the piston body to move from the second position to the first position and be positioned at the first position during a process of sliding from the second positioning point through the second groove body to the first positioning point.

7. The blood collection device according to claim 1, characterized in that: The operating assembly is a rotating operating assembly, and the rotating operating assembly is rotatably connected to an end of the cylinder away from the piston body.

8. The blood collection device according to claim 7, characterized in that: The end of the linkage rod away from the piston body is provided with a linkage part, one of the linkage part and the cylinder is provided with a moving groove, and the other is provided with a moving guide rail, and the moving guide rail and the moving groove can be movably matched to make the linkage rod move relative to the cylinder; The linkage portion is provided with a guiding curved surface, and the two ends of the guiding curved surface are respectively provided with a first positioning groove and a second positioning groove, the height of the first positioning groove is smaller than the height of the second positioning groove, and the rotating operation component includes a rotating portion, and the rotating portion is provided with a rotating positioning ridge, and the rotating positioning ridge is configured to enable the piston body to move from the first position to the second position and be positioned at the second position during the process of moving from the first positioning groove to the second positioning groove via the guiding curved surface, and to enable the piston body to move from the second position to the first position and be positioned at the first position during the process of moving from the second positioning groove to the first positioning groove via the guiding curved surface.

9. A blood collection device comprising a blood collection tube, characterized in that: It also includes a blood sampling device of the vascular access blood sampling device according to any one of claims 1 to 8, wherein the blood sampling device is connected to the blood sampling blood channel.

10. The vascular access blood sampling device according to claim 9, characterized in that: The vascular access blood sampling device also includes: A stop valve is provided on the blood collection tube circuit and is located on the side of the blood collection device close to the blood vessel, and is used to control the opening and closing of the blood collection tube circuit; A heparin cap is arranged on the blood collection tube, and the heparin cap is provided with an upwardly facing socket; Wherein, the stop valve is provided with a switch handle, and the switch handle is used to expose the socket when it is in a closed state and to cover the socket when it is in an open state.

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