Negative pressure blood drawing device facilitating blood stasis

Abstract

The application provides a negative pressure blood drawing device facilitating blood stasis discharge, which comprises a blood drawing needle tube, a blood drawing tube, a replacement bag, a first sealing assembly, a second sealing assembly, a driving assembly and a transmission assembly; the top of the blood drawing needle tube is provided with a first sliding groove, the first sliding groove is in communication with the inside and outside of the blood drawing needle tube; a liquid inlet pipe is arranged on the first sliding groove and is in communication with the blood drawing tube; the first sealing assembly is slidably arranged in the first sliding groove and can seal or open the liquid inlet pipe; the blood drawing needle tube is provided with a second sliding groove, one end of the second sliding groove is in communication with the inside and outside of the blood drawing needle tube; a liquid outlet pipe is arranged on the second sliding groove and is detachably communicated with the replacement bag; the second sealing assembly is slidably arranged in the second sliding groove and can seal or open the liquid outlet pipe; the driving assembly is rotatably arranged on the blood drawing needle tube and can simultaneously drive the first sealing assembly and the second sealing assembly to slide, so as to seal or open the liquid inlet pipe or the liquid outlet pipe.

Description

Technical Field

[0001] This invention relates to the field of blood collection and treatment technology, and specifically to a negative pressure blood collection device that facilitates the removal of stagnant blood. Background Technology

[0002] After thyroid-related surgery, patients are prone to neck bruising. To address this issue, the current clinical practice involves inserting one end of a thin tube into the area of ​​bruising in the neck and connecting the other end to a blood-drawing needle. The blood-drawing needle is then fixed to the patient, and the bruising is aspirated through the needle.

[0003] However, after drawing enough blood, the blood-drawing catheter needs to be drained. This requires clamping the blood-drawing tube and then removing the blood-drawing needle to drain the blood from the needle, which is quite troublesome. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention proposes a negative pressure blood aspiration device that facilitates the drainage of stagnant blood, thereby solving the technical problem mentioned in the background art where, after the blood is fully drained, the blood aspiration tube needs to be clamped and then the blood aspiration needle removed for blood drainage.

[0005] To solve this technical problem, the technical solution adopted by the present invention is as follows:

[0006] A negative pressure blood collection device for facilitating the removal of blood clots includes a blood collection needle, a blood collection tube, a replacement bag, a first sealing assembly, a second sealing assembly, a drive assembly, and a transmission assembly.

[0007] The top of the blood-drawing needle tube is provided with a first groove, one end of which is connected to the inside and outside of the blood-drawing needle tube; an inlet tube is provided on the first groove, which is connected to the blood-drawing tube; the first sealing component is slidably disposed in the first groove and can close or open the inlet tube.

[0008] The blood-drawing needle tube has a second groove on its side, one end of which is connected to the inside and outside of the blood-drawing needle tube; the second groove is provided with a liquid outlet tube, the replacement bag is detachably connected to the liquid outlet tube, and the second sealing assembly is slidably disposed in the second groove and can close or open the liquid outlet tube;

[0009] The driving component is rotatably mounted on the blood-drawing needle tube and can simultaneously drive the first sealing component and the second sealing component to slide, thereby sealing the inlet tube or the outlet tube.

[0010] Furthermore, a transmission assembly is also provided; the transmission assembly is rotatably mounted on the blood-drawing needle tube and connected to the push-pull rod of the blood-drawing needle tube; the transmission assembly is elastic, and the forward rotation of the drive assembly can open the inlet tube and close the outlet tube, while simultaneously causing the transmission assembly to rotate and drive the push-pull rod to slide outward; the reverse rotation of the drive assembly can close the inlet tube and open the outlet tube, and then cause the transmission assembly to rotate and drive the push-pull rod to slide inward.

[0011] Furthermore, the first sealing assembly includes a first rack and a first sealing plate; the first rack and the first sealing plate are connected and slidably connected to the first groove, the driving assembly can drive the first rack to slide, and the first sealing plate can seal the liquid inlet pipe.

[0012] Furthermore, the second sealing assembly includes a second rack and a second sealing plate; the second rack and the second sealing plate are connected and slidably connected to the second groove, the driving assembly can drive the second rack to slide, and the second sealing plate can seal the liquid outlet pipe.

[0013] Furthermore, the driving assembly includes a first fixed plate, a motor, a gear, and a drive plate; the first fixed plate is disposed on the blood-drawing needle tube, the motor is fixed on the first fixed plate, the gear is coaxially fixed on the output shaft of the motor, the gear meshes with the first rack and the second rack simultaneously, the drive plate is fixed on the gear along the radial direction of the gear, and the drive plate can drive the transmission assembly to rotate.

[0014] Furthermore, the transmission assembly includes a second fixed plate, a transmission shaft, a transmission plate, and an elastic rope; the second fixed plate is disposed on the blood-drawing needle tube, the transmission shaft is rotatably connected to the second fixed plate, the transmission plate is fixed on the side of the transmission shaft, and the drive plate can drive the transmission plate to rotate; one end of the elastic rope is fixed on the transmission shaft, and the other end is wound around the transmission shaft and connected to the push-pull rod.

[0015] Furthermore, the blood-drawing needle is also equipped with an adhesion plate.

[0016] The advancements of this application compared to existing technologies are as follows:

[0017] By rotating the drive assembly, the positions of the first and second sealing assemblies are simultaneously changed, allowing a single rotation to alter the sealing status of both the inlet and outlet tubes. When blood clots need to be drawn, the inlet tube is opened and the outlet tube closed. Pulling the push-pull rod of the blood-drawing needle allows the blood clots to flow from the evacuation tube through the inlet tube and the first groove into the blood-drawing needle, while simultaneously recording the amount of blood clots drawn. After blood clots are drawn, rotating the drive assembly in the opposite direction closes the inlet tube and opens the outlet tube. Pushing the push-pull rod of the blood-drawing needle allows the drawn blood clots to flow through the second groove and outlet tube into the replacement bag. Rotating the drive assembly again opens the inlet tube and closes the outlet tube, thus connecting the blood-drawing needle and the evacuation tube. If the replacement bag contains enough blood clots, it can be removed and replaced with a new one for easy aspiration and drainage of blood clots next time. This device maintains the connection between the blood-drawing needle and the evacuation tube, eliminating the need to remove the needle after the blood clots are full, making operation more convenient. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0019] Figure 1 This is a schematic diagram of a negative pressure blood drawing device for facilitating the removal of blood clots, provided in an embodiment of the present invention;

[0020] Figure 2 for Figure 1 A cross-sectional schematic diagram of a negative pressure blood collection device that facilitates the removal of blood clots is shown.

[0021] Figure 3 for Figure 1 A schematic diagram of the first sealing component shown;

[0022] Figure 4 for Figure 1 A schematic diagram of the second sealing component is shown.

[0023] Figure label:

[0024] Blood drawing needle 1, first chute 11, inlet tube 12, second chute 13, outlet tube 14, push-pull rod 15.

[0025] 2. Drawing blood vials

[0026] Replacement bag 3

[0027] First sealing component 4, first toothed rack 41, first sealing plate 42

[0028] Second sealing component 5, second toothed rack 51, second sealing plate 52

[0029] Drive assembly 6, first fixed plate 61, motor 62, gear 63, drive plate 64

[0030] Transmission assembly 7, second fixed plate 71, transmission shaft 72, transmission plate 73, elastic rope 74

[0031] Adhesive board 8. Detailed Implementation

[0032] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0033] Please refer to the following: Figures 1-4 This embodiment provides a negative pressure blood collection device for facilitating the removal of blood clots, including a blood collection needle 1, a blood collection tube 2, a replacement bag 3, a first sealing assembly 4, a second sealing assembly 5, a drive assembly 6, and a transmission assembly 7.

[0034] The top of the blood-drawing needle tube 1 is provided with a first groove 11, one end of which is connected to the inside and outside of the blood-drawing needle tube 1; an inlet tube 12 is provided on the first groove 11, which is connected to the blood-drawing tube 2; a first sealing component 4 is slidably disposed in the first groove 11 and can close or open the inlet tube 12; specifically, one end of the first groove 11 is provided with a through hole connecting the inside and outside of the blood-drawing needle tube 1, and the blood in the inlet tube 12 can enter the first groove 11 through the through hole and then flow into the blood-drawing needle tube 1; the first sealing component 4 changes its position on the first groove 11 by sliding, thereby opening or closing the inlet tube 12.

[0035] The blood-drawing needle tube 1 has a second groove 13 on its side, one end of which is connected to the inside and outside of the blood-drawing needle tube 1; the second groove 13 is provided with a liquid outlet tube 14, and the replacement bag 3 is detachably connected to the liquid outlet tube 14; the second sealing assembly 5 is slidably disposed in the second groove 13 and can close or open the liquid outlet tube 14; specifically, the upper end of the second groove 13 is provided with a through hole connecting the inside and outside of the blood-drawing needle tube 1, and the blood in the blood-drawing needle tube 1 can flow into the second groove 13 through the through hole and then into the replacement bag 3 through the liquid outlet tube 14; the second sealing assembly 5 changes its position on the second groove 13 by sliding, thereby opening or closing the liquid inlet tube 12.

[0036] The driving component 6 is rotatably mounted on the blood-drawing needle tube 1 and can simultaneously drive the first sealing component 4 and the second sealing component 5 to slide, thereby sealing the inlet tube 12 or the outlet tube 14. That is to say, the inlet tube 12 and the outlet tube 14 are not closed at the same time. When the inlet tube 12 is closed, the outlet tube 14 is open, and when the outlet tube 14 is closed, the inlet tube 12 is open.

[0037] By rotating the drive component 6, the positions of the first sealing component 4 and the second sealing component 5 are simultaneously changed, so that a single rotation can change the sealing status of the inlet pipe 12 and the outlet pipe 14 at the same time; when it is necessary to draw out blood clots, the inlet pipe 12 is opened and the outlet pipe 14 is closed, and the push-pull rod 15 of the blood-drawing needle tube 1 is pulled outward, so that the blood clots enter the blood-drawing needle tube 1 from the blood-drawing tube 2 through the inlet pipe 12 and the first sliding groove 11, and the amount of blood clots drawn out in the blood-drawing tube 2 can be recorded at the same time; after the blood clots are drawn out, the reverse... Rotating the drive assembly 6 closes the inlet tube 12 and opens the outlet tube 14, pushing the push-pull rod 15 of the blood-drawing needle tube 1 inward, allowing the drawn blood to flow through the second chute 13 and the outlet tube 14 into the replacement bag 3. Then, rotating the drive assembly 6 again opens the inlet tube 12 and closes the outlet tube 14, thus connecting the blood-drawing needle tube 1 and the blood-drawing tube 2. If there is enough blood in the replacement bag 3, it can be removed and replaced with a new replacement bag 3 for easy blood aspiration and drainage next time. This device maintains the connection between the blood-drawing needle tube 1 and the blood-drawing tube 2, eliminating the need to remove the blood-drawing needle tube 1 after it is full of blood, making operation more convenient.

[0038] In other embodiments, a transmission assembly 7 is also provided; the transmission assembly 7 is rotatably mounted on the blood-drawing needle tube 1 and connected to the push-pull rod 15 of the blood-drawing needle tube 1; the transmission assembly 7 is elastic, and the forward rotation of the drive assembly 6 can open the inlet tube 12 and close the outlet tube 14, while at the same time causing the transmission assembly 7 to rotate and drive the push-pull rod 15 to slide outward; the reverse rotation of the drive assembly 6 can close the inlet tube 12 and open the outlet tube 14, and then cause the transmission assembly 7 to rotate and drive the push-pull rod 15 to slide inward.

[0039] It should be understood that the sliding transmission component 7 is compressed and can recover its deformation when the drive component 6 rotates in the opposite direction, causing the transmission component 7 to slide in the opposite direction. Specifically, in the initial state, the push-pull rod 15 is located inside the blood-drawing needle tube 1 and close to the blood-drawing tube 2. The first sealing component 4 closes the inlet tube 12, and the second sealing component 5 opens the outlet tube 14. The transmission component 7 is in a compressed state and its elastic deformation is restricted by the drive component 6. As the drive component 6 rotates forward, the first sealing component 4 and the second sealing component 5 begin to slide. At the same time, the transmission component 7 gradually recovers its elastic deformation, driving the push-pull rod 15 to slide outward. The first sealing component 4 gradually opens the inlet tube 12, and the second sealing component 5 closes the outlet tube 14. The forward rotation of the transmission component 7 drives the push-pull rod 15 to slide outward, and after the outlet tube 14 is closed, it passes through the outlet tube. 14. During the blood draw, the second sealing component 5 will continue to seal the outlet tube 14 after sealing it. The transmission component 7 is in a natural state at the end of the blood draw stroke, neither stretched nor compressed. When the drawn blood needs to be discharged, the reverse drive component 6 is reversed. The drive component 6 drives the first sealing component 4 to gradually close the inlet tube 12. At the same time, the second sealing component 5 gradually opens the outlet tube 14. After the inlet tube 12 is closed and the outlet tube 14 is opened, the transmission component 7 is reversed, causing the push-pull rod 15 to slide inward. During this process, the inlet tube 12 remains closed, which can prevent the blood from being pushed back into the patient's body when pushing the blood out of the blood aspiration needle tube.

[0040] In other embodiments, the first sealing assembly 4 includes a first rack 41 and a first sealing plate 42; the first rack 41 and the first sealing plate 42 are connected and slidably connected to the first groove 11, the driving assembly 6 can drive the first rack 41 to slide, and the first sealing plate 42 can seal the liquid inlet pipe 12.

[0041] In other embodiments, the second sealing assembly 5 includes a second rack 51 and a second sealing plate 52; the second rack 51 and the second sealing plate 52 are connected and slidably connected to the second groove 13, the driving assembly 6 can drive the second rack 51 to slide, and the second sealing plate 52 can seal the liquid outlet pipe 14.

[0042] It should be understood that the first sealing plate 42 and the second sealing plate 52 have the same length and slide at the same speed; the inlet pipe 12 and the outlet pipe 14 have the same diameter and are shorter than the length of the first sealing plate 42; the through holes on the first slide groove 11 and the second slide groove 13 have the same diameter and are shorter than the length of the first sealing plate 42. Preferably, the diameter of the outlet pipe 14, the diameter of the inlet pipe 12, and the diameter of the through holes on the first slide groove 11 and the second slide groove 13 are all half or one-third of the diameter of the first sealing plate 42. In the initial state, the tail of the first sealing plate 42 is located at the end of the inlet pipe 12. The inlet pipe 12 can be gradually opened by sliding it away from the inlet pipe 12. The end of its sliding stroke is when the first sealing plate 42 is completely away from the inlet pipe 12. The head of the second sealing plate 52 is located at the end of the outlet pipe 14. The outlet pipe 14 can be gradually closed by sliding it towards the outlet pipe 14. Furthermore, it should be understood that the first slide 11 and the second slide 13 are L-shaped slides, with the vertical side slide being longer than the horizontal side; the first rack 41 and the second rack 51 are respectively located on the vertical side of the L-shaped slide, the first sealing plate 42 and the second sealing plate 52 are respectively located on the horizontal side of the L-shaped slide, and the through holes of the first slide 11 and the second slide 13 are located on the horizontal side.

[0043] In other embodiments, the drive assembly 6 includes a first fixed plate 61, a motor 62, a gear 63, and a drive plate 64. The first fixed plate 61 is mounted on the blood-drawing needle tube 1, the motor 62 is fixed on the first fixed plate 61, the gear 63 is coaxially fixed on the output shaft of the motor 62, and the gear 63 meshes with both the first rack 41 and the second rack 51. The drive plate 64 is fixed radially on the gear 63, and the drive plate 64 can drive the transmission assembly 7 to rotate. It should be understood that the motor 62 can rotate in both directions and can hold its output shaft when it stops rotating. The drive plate 64 initially abuts against the transmission assembly 7. When the gear 63 rotates in reverse, the drive plate 64 rotates one revolution and drives the transmission assembly 7 to rotate.

[0044] In other embodiments, the transmission assembly 7 includes a second fixed plate 71, a transmission shaft 72, a transmission plate 73, and an elastic rope 74; the second fixed plate 71 is mounted on the blood-drawing needle tube 1, the transmission shaft 72 is rotatably connected to the second fixed plate 71, the transmission plate 73 is fixed to the side of the transmission shaft 72, and the drive plate 64 can drive the transmission plate 73 to rotate; one end of the elastic rope 74 is fixed to the transmission shaft 72, and the other end is wound around the transmission shaft 72 and connected to the push-pull rod 15.

[0045] In other designs, the blood-drawing needle 1 is also equipped with an adhesive plate 8. The side of the fixing plate away from the blood-drawing needle 1 is adhesive, allowing it to adhere to the patient, thus facilitating the fixation of the device.

[0046] The aforementioned negative pressure blood-drawing device, which facilitates the removal of stagnant blood, can drain the stagnant blood from the blood-drawing needle while maintaining the connection with the blood-drawing tube.

[0047] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A negative pressure blood aspiration device for facilitating the removal of stagnant blood, characterized in that, It includes a blood-drawing needle, a blood-drawing tube, a replacement bag, a first sealing assembly, a second sealing assembly, and a drive assembly; The top of the blood-drawing needle tube is provided with a first groove, one end of which is connected to the inside and outside of the blood-drawing needle tube; an inlet tube is provided on the first groove, which is connected to the blood-drawing tube; the first sealing component is slidably disposed in the first groove and can close or open the inlet tube. The blood-drawing needle tube has a second groove on its side, one end of which is connected to the inside and outside of the blood-drawing needle tube; the second groove is provided with a liquid outlet tube, the replacement bag is detachably connected to the liquid outlet tube, and the second sealing assembly is slidably disposed in the second groove and can close or open the liquid outlet tube; The driving component is rotatably mounted on the blood-drawing needle tube and can simultaneously drive the first sealing component and the second sealing component to slide, thereby sealing the inlet tube or the outlet tube. It also includes a transmission assembly; the transmission assembly is rotatably mounted on the blood-drawing needle tube and connected to the push-pull rod of the blood-drawing needle tube; the transmission assembly is elastic, and the forward rotation of the drive assembly can open the inlet tube and close the outlet tube, while simultaneously causing the transmission assembly to rotate and drive the push-pull rod to slide outward; the reverse rotation of the drive assembly can close the inlet tube and open the outlet tube, and then cause the transmission assembly to rotate and drive the push-pull rod to slide inward.

2. The negative pressure blood drawing device for facilitating the removal of stagnant blood according to claim 1, characterized in that, The first sealing assembly includes a first rack and a first sealing plate; the first rack and the first sealing plate are connected and slidably connected to the first groove; the driving assembly can drive the first rack to slide; and the first sealing plate can seal the liquid inlet pipe.

3. The negative pressure blood drawing device for facilitating the removal of stagnant blood according to claim 2, characterized in that, The second sealing assembly includes a second rack and a second sealing plate; the second rack and the second sealing plate are connected and slidably connected to the second groove, the driving assembly can drive the second rack to slide, and the second sealing plate can seal the liquid outlet pipe.

4. The negative pressure blood drawing device for facilitating the removal of stagnant blood according to claim 3, characterized in that, The drive assembly includes a first fixed plate, a motor, a gear, and a drive plate; the first fixed plate is disposed on the blood-drawing needle tube, the motor is fixed on the first fixed plate, the gear is coaxially fixed on the output shaft of the motor, the gear meshes with the first rack and the second rack, the drive plate is fixed on the gear along the radial direction of the gear, and the drive plate can drive the transmission assembly to rotate.

5. A negative pressure blood drawing device for facilitating the removal of stagnant blood according to claim 4, characterized in that, The transmission assembly includes a second fixed plate, a transmission shaft, a transmission plate, and an elastic rope; the second fixed plate is disposed on the blood-drawing needle tube, the transmission shaft is rotatably connected to the second fixed plate, the transmission plate is fixed on the side of the transmission shaft, and the drive plate can drive the transmission plate to rotate; one end of the elastic rope is fixed on the transmission shaft, and the other end is wound around the transmission shaft and connected to the push-pull rod.

6. A negative pressure blood drawing device for facilitating the removal of stagnant blood according to claim 5, characterized in that, The blood-drawing needle is also equipped with an adhesion plate.

Images