An arterial lancet assembly

Abstract

The utility model relates to an artery blood taking needle assembly belongs to medical appliance technical field, the blood taking needle assembly includes valve body, is equipped with the first passage, second passage and third passage who intercommunicate, and valve body is equipped with first liquid outlet, second liquid outlet and liquid inlet, first passage, second passage and third passage respectively penetrate first liquid outlet, second liquid outlet, liquid inlet, valve core, slidingly installs in second passage, and valve core is equipped with through -hole and flow channel, artery puncture needle is connected in liquid inlet through connecting pipe, blood pressure monitor is connected in first liquid outlet, sealing cover is connected in second liquid outlet and covers second passage, blood taking needle is connected puncture needle through pipeline, when blood taking needle punctures sealing cover and extends into second passage, valve core is driven through blood taking needle, and flow channel leads through third passage and second passage, and valve core is connected with elastic reset member, and when blood taking needle separates from sealing cover, valve core is driven reset through elastic reset member, and through -hole leads through third passage and first passage.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, and specifically relates to an arterial blood collection needle assembly. Background Technology

[0002] In the intensive care unit, arterial blood sampling is a key procedure for obtaining arterial blood from patients for blood gas analysis, which is mainly used to assess the patient's oxygenation status, ventilation function, acid-base balance and electrolyte levels.

[0003] Currently, the main way medical staff in clinical practice draw arterial blood from patients is by using a syringe to draw arterial blood from the patient and then pushing the blood from the syringe into a negative pressure blood collection tube.

[0004] Currently, the existing procedures for arterial blood collection in clinical practice are quite cumbersome. Furthermore, when using a syringe to draw blood and then using another syringe to push the drawn blood into the blood collection tube, it is easy for blood to splatter onto the hands of medical staff.

[0005] Therefore, based on the practical problems encountered in the existing clinical operation process, this application designs an arterial blood collection needle assembly. Utility Model Content

[0006] This invention provides an arterial blood collection needle assembly to solve the technical problems of cumbersome operation and easy splashing of blood onto medical staff's hands when collecting arterial blood from patients in the intensive care unit.

[0007] This utility model is achieved through the following technical solution:

[0008] An arterial blood collection needle assembly, comprising:

[0009] The valve body has a first channel, a second channel and a third channel inside, and a first liquid outlet, a second liquid outlet and a liquid inlet are provided on the outer wall of the valve body. The first channel passes through the first liquid outlet, the second channel passes through the second liquid outlet, and the third channel passes through the liquid inlet.

[0010] The valve core is slidably mounted in the second channel, and the valve core is provided with a through hole and a flow channel;

[0011] An arterial puncture needle is connected to the inlet head via a connecting tube and is in communication with the third channel;

[0012] A blood pressure monitor is connected to the first dispensing head and communicates with the first channel;

[0013] A sealing cap is connected to the second liquid outlet head, and the sealing cap seals the opening of the second channel;

[0014] The blood collection needle is connected to an insertion needle via a tubing for inserting into a negative pressure blood collection tube. When the blood collection needle pierces the sealing cap and extends into the second channel, the valve core is pushed by the blood collection needle to make the flow channel open between the third channel and the second channel.

[0015] The valve core is also connected to an elastic reset member. When the blood collection needle is withdrawn from the sealing cover, the valve core is driven to reset by the elastic reset member, so that the through hole connects the third channel and the first channel.

[0016] Furthermore, in order to better realize this utility model, the first channel, the second channel and the third channel form a "T" shaped channel, the second channel is located between the first channel and the third channel, and the valve body is also provided with a clearance channel that is directly opposite to and connected to the second channel, and the valve core extends into the clearance channel;

[0017] When the flow channel connects the third channel and the second channel, the through hole moves into the clearance channel and is blocked by the side wall of the clearance channel;

[0018] When the through hole connects the third channel and the first channel, the flow channel moves into the second channel and blocks the entrance of the flow channel through the side wall of the second channel.

[0019] Furthermore, in order to better realize this utility model, the outlet of the flow channel faces the sealing cap, a bracket is provided in the outlet of the flow channel, and the blood collection needle inserted into the second channel abuts against the bracket.

[0020] Furthermore, in order to better realize this utility model, the sealing cover is provided with an insertion hole for inserting the blood collection needle, and the bracket is provided with a positioning countersunk hole corresponding to the insertion hole, and the needle tip of the blood collection needle inserted into the second channel is placed in the positioning countersunk hole.

[0021] Furthermore, to better realize this utility model, the sealing cap includes:

[0022] A cover is screwed to the second liquid outlet head, and the insertion hole is provided on the cover.

[0023] A rubber block is bonded and fixed inside the cover body, and the rubber block is spaced between the end face of the cover body and the second liquid outlet head.

[0024] Furthermore, in order to better realize this utility model, an outer protrusion is provided on the outer wall of the valve body, the clearance channel extends into the outer protrusion, and the elastic reset member is installed in the clearance channel.

[0025] Furthermore, to better realize this utility model, the external protrusion includes:

[0026] A cylindrical protrusion, the clearance channel passing through the cylindrical protrusion;

[0027] An adjusting cover is screwed onto the cylindrical protrusion, the adjusting cover blocking the opening of the clearance channel, and the elastic reset member is connected between the adjusting cover and the valve core.

[0028] Furthermore, in order to better realize this utility model, the elastic reset element is a spring, one end of the spring is connected to the valve core, and the other end of the spring is connected to the adjusting cover.

[0029] Furthermore, in order to better realize this utility model, both the valve core and the adjusting cover are provided with protrusions, and the spring is sleeved on the protrusions.

[0030] Furthermore, in order to better realize this utility model, it also includes:

[0031] A sealing film is attached to the sealing cover after the blood collection needle is withdrawn from the sealing cover, and the sealing film blocks the insertion hole.

[0032] Compared with the prior art, this utility model has the following advantages:

[0033] 1. When using the arterial blood collection needle assembly provided by this utility model, the arterial puncture needle is inserted into the patient's artery, connecting the third channel in the valve body to the patient's artery. When blood collection is not needed, the blood collection needle is withdrawn from the sealing cover, and the valve core is reset under the drive of the elastic reset member, making the through hole on the valve core open the third channel and the first channel. In this way, blood passes through the third channel, the through hole, and the first channel to reach the blood pressure monitor for monitoring the patient's blood pressure. When blood collection is needed, the blood collection needle is first inserted into the negative pressure blood collection tube through the puncture needle connected to the tubing, and then the blood collection needle pierces the sealing cover and extends into the second channel. The tip of the lancet abuts against the valve core. During insertion, the lancet pushes the valve core forward, changing its position within the second channel. This opens the flow path between the third and first channels, allowing blood to pass through the third channel and flow path into the second channel. Because the lancet is positioned in the second channel and connected to a negative pressure blood collection tube, the blood in the second channel is drawn into the negative pressure blood collection tube, completing the blood collection process. After blood collection, the lancet is removed from the sealing cap, and the valve core resets under the drive of the elastic reset element, ensuring that blood can only enter the first channel and not the second channel.

[0034] 2. When collecting blood, the arterial blood collection needle assembly of this structure only requires inserting the blood collection needle into the sealing cap and pushing the blood collection needle forward to drive the valve core in the valve body to move, so that the blood can flow into the second flow channel where the blood collection needle is located. The blood collection operation is simple and convenient, and the collected blood sample flows directly into the negative pressure blood collection tube, so there is no need to worry about blood splashing onto your hands. Furthermore, when the blood collection is completed and the blood collection needle is withdrawn from the sealing cap, the elastic drive will automatically drive the valve core to reset in the valve body. After the valve core is reset, the blood can only enter the first channel from the third channel and cannot enter the second channel, thus effectively preventing blood from flowing out from the sealing cap. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the arterial blood collection needle assembly provided in this embodiment of the present invention when no blood is being collected;

[0037] Figure 2 yes Figure 1 A cross-sectional view of the structure shown;

[0038] Figure 3 yes Figure 2 A magnified view of region A in the image;

[0039] Figure 4 This is a cross-sectional view of the adjusting cover in an embodiment of this utility model;

[0040] Figure 5 This is a schematic diagram of the arterial blood collection needle assembly provided in this embodiment of the present invention during blood collection;

[0041] Figure 6 yes Figure 5 A cross-sectional view of the structure shown;

[0042] Figure 7 This is a cross-sectional view of the valve body in an embodiment of this utility model;

[0043] Figure 8 This is a schematic diagram of the valve core structure in an embodiment of this utility model;

[0044] Figure 9 yes Figure 8 Another perspective view of the valve core shown;

[0045] Figure 10 yes Figure 8The cross-sectional view of the valve core shown.

[0046] In the diagram: 100-valve body, 110-first channel, 120-second channel, 130-third channel, 140-clearance channel, 150-first outlet head, 160-second outlet head, 170-inlet head, 180-outer protrusion, 181-cylindrical protrusion, 182-adjusting cap, 200-valve core, 210-through hole, 220-flow channel, 230-support, 240-positioning countersunk hole, 300-arterial puncture needle, 310-connecting tube, 400-blood pressure monitor, 500-sealing cap, 510-cap body, 511-insertion hole, 520-rubber block, 600-blood collection needle, 610-tube, 620-puncture needle, 700-spring, 800-sealing film, 900-protrusion. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0048] Example: Figures 1-10 As shown, the arterial blood collection needle assembly provided in this embodiment includes a valve body 100, an arterial puncture needle 300, a blood pressure monitor 400, a sealing cap 500, a blood collection needle 600, and an elastic reset member, wherein:

[0049] The valve body 100 has a first channel 110, a second channel 120 and a third channel 130 inside. The outer wall of the valve body 100 has a first liquid outlet 150, a second liquid outlet 160 and a liquid inlet 170. The first channel 110 is designed to pass through the first liquid outlet 150, the second channel 120 is designed to pass through the second liquid outlet 160 and the third channel 130 is designed to pass through the liquid inlet 170. The valve core 200 is slidably installed in the second channel 120. The valve core 200 is also designed with a through hole 210 and a flow channel 220.

[0050] The arterial puncture needle 300 is connected to the inlet head 170 via the connecting tube 310, thereby connecting the arterial puncture needle 300 to the third channel 130. In use, the arterial puncture needle 300 is inserted into the patient's artery. Of course, the arterial puncture needle 300 can be an indwelling needle. In this case, the valve body 100 is connected to the patient's artery for a long time, that is, the third channel 130 is always filled with the patient's arterial blood.

[0051] The blood pressure monitor 400 is connected to the first dispensing head 150, thereby connecting the blood pressure monitor 400 to the first channel 110. The blood pressure monitor 400 can also be other devices used to monitor a patient's blood condition, such as a pulse oximeter.

[0052] The sealing cap 500 is connected to the second liquid outlet 160, and the sealing cap 500 covers the opening of the second channel 120. It should be noted that the second channel 120 passes through the second liquid outlet 160, so the opening of the second channel 120 is formed on the end face of the second liquid outlet 160.

[0053] The blood collection needle 600 is connected to an insertion needle 620 for inserting into the negative pressure blood collection tube via a conduit 610. It is worth noting that the negative pressure blood collection tube is existing technology, so it will not be described in detail here. When blood needs to be collected, the blood collection needle 600 pierces the sealing cap 500 and extends into the second channel 120. The blood collection needle 600 inserted into the second channel 120 abuts against the valve core 200. As the blood collection needle 600 continues to extend forward, it will push the valve core 200 forward, causing the flow channel 220 on the valve core 200 to connect the third channel 130 and the second channel 120. In this way, the blood in the third channel 130 will pass through the flow channel 220 and enter the second channel 120. Because the blood collection needle 600 is placed in the second channel 120, under the negative pressure of the negative pressure blood collection tube, the blood in the second channel 120 will pass through the blood collection needle 600, the tubing 610 and the piercing needle 620 and automatically enter the blood collection tube.

[0054] The aforementioned elastic reset member is connected to the valve core 200. When the valve core 200 moves forward under the push of the blood collection needle 600, the valve core 200 will compress the elastic reset member. When blood collection is completed, the blood collection needle 600 is pulled away from the sealing cover 500, causing the blood collection needle 600 to release the valve core 200. The compressed elastic reset member will then drive the valve core 200 to automatically retract and reset. After reset, the through hole 210 of the valve core 200 connects the aforementioned third channel 130 and the first channel 110, so that the blood in the third channel 130 can only flow into the first channel 110, so that the blood pressure monitor can monitor the patient's arterial blood pressure. In this case, the blood in the third channel 130 cannot enter the second channel 120.

[0055] With the above structure, the arterial blood collection needle assembly provided in this embodiment only requires inserting the blood collection needle 600 into the sealing cover 500 and pushing the blood collection needle 600 forward during blood collection to drive the valve core 200 in the valve body 100 to move, so that blood can flow into the second flow channel 220 where the blood collection needle 600 is located. The blood collection operation is simple and convenient, and the collected blood sample flows directly into the negative pressure blood collection tube, so there is no need to worry about blood splashing onto your hands. Furthermore, when the blood collection is completed and the blood collection needle 600 is withdrawn from the sealing cover 500, the elastic drive will automatically drive the valve core 200 to reset in the valve body 100. After the valve core 200 is reset, the blood can only enter the first channel 110 from the third channel 130 and cannot enter the second channel 120, thereby effectively preventing blood from flowing out from the sealing cover 500.

[0056] Optionally, the first channel 110, the second channel 120, and the third channel 130 form a "T"-shaped channel, wherein the second channel 120 is located between the first channel 110 and the third channel 130. The valve body 100 also has a clearance channel 140, which is directly opposite to and connected to the second channel 120. In this case, the first channel 110, the second channel 120, the third channel 130, and the clearance channel 140 form a "+"-shaped channel. The valve core 200 is not only slidably installed in the second channel 120, but also extends into the clearance channel 140. That is, the clearance channel 140 provides clearance for the movement of the valve core 200 within the valve body 100.

[0057] When the flow channel 220 within the valve core 200 connects the third channel 130 and the second channel 120, the through hole 210 on the valve core 200 moves into the aforementioned clearance channel 140, thereby blocking the through hole 210 with the side wall of the clearance channel 140. In this case, blood cannot enter the through hole 210 and the first channel 110, thus disconnecting the connection between the first channel 110 and the third channel 130. When the through hole 210 connects the third channel 130 and the first channel 110, the flow channel 220 moves into the second channel 120, thereby blocking the entrance of the flow channel 220 with the side wall of the second channel 120. In this case, blood cannot enter the flow channel 220 and the second channel 120, thus disconnecting the connection between the second channel 120 and the third channel 130.

[0058] Optionally, the flow channel 220 has not only an inlet but also an outlet. The outlet is connected to the second channel 120 and faces the sealing cover 500. A bracket 230 is provided in the outlet of the flow channel 220. The blood collection needle 600 inserted into the second channel 120 abuts against the bracket 230. In this way, when the blood collection needle 600 inserted into the second channel 120 continues to move forward, the thrust will be transmitted to the valve core 200 through the bracket 230, thereby pushing the valve core 200 to move within the valve body 100.

[0059] Optionally, the sealing cap 500 in this embodiment includes a cap body 510 and a rubber block 520. The cap body 510 is screwed to the second liquid outlet 160, thereby connecting the sealing cap 500 to the second liquid outlet 160. The rubber block 520 is bonded and fixed inside the cap body 510. The rubber block 520 is installed between the end faces of the cap body 510 and the second liquid outlet 160, so that the rubber block 520 can seal the opening of the second channel 120. An insertion hole 511 for inserting a blood collection needle 600 is provided on the cover 510. The rubber block 520 has no holes. When the tip of the blood collection needle 600 passes through the insertion hole 511 and continues to advance, the tip of the blood collection needle 600 will pierce the rubber block 520 and enter the second channel 120. A positioning countersunk hole 240 corresponding to the insertion hole 511 is provided on the bracket 230. The tip of the blood collection needle 600 inserted into the second channel 120 is placed in the positioning countersunk hole 240, and the tip of the needle abuts against the bottom of the positioning countersunk hole 240. It is easy to understand that the positioning countersunk hole 240 and the insertion hole 511 are coaxially arranged, and the valve core 200 is a cuboid structure, while the second channel 120 and the clearance channel 140 are square channels. That is, the valve core 200 will not rotate when moving in the second channel 120 and the clearance channel 140. The positioning countersunk hole 240 and the insertion hole 511 simultaneously position the blood collection needle 600.

[0060] Specifically, the tip of the blood collection needle 600 is a solid structure, and the inlet of the blood collection needle 600 is located on the side wall of the blood collection needle 600.

[0061] To ensure a sealing effect and to prevent dust and bacteria from entering, the arterial blood collection needle assembly provided in this embodiment also includes a sealing film 800. The sealing film 800 is adhered to the sealing cover 500. After the blood collection needle 600 is removed from the sealing cover 500, the sealing film 800 is used to seal the insertion hole 511.

[0062] An optional implementation of this embodiment is as follows: An outer protrusion 180 is also designed on the outer wall of the valve body 100, and the clearance channel 140 extends into the outer protrusion 180, thus making the clearance channel 140 longer. The elastic reset member is installed in the clearance channel 140. Specifically, the outer protrusion 180 includes a cylindrical protrusion 181 and an adjusting cover 182. The cylindrical protrusion 181 is integrally formed on the outer wall of the valve body 100, the clearance channel 140 passes through the cylindrical protrusion 181, the adjusting cover 182 is screwed to the cylindrical protrusion 181 and seals the opening of the clearance channel 140, and the elastic reset member is connected between the adjusting cover 182 and the valve core 200. This design not only facilitates the disassembly and assembly of the elastic reset component, but also allows the valve core 200 to move towards the position of the adjusting cover 182 when the blood collection needle 600 pushes it forward, thereby compressing the elastic reset component. When the blood collection needle 600 releases the valve core 200, the compressed elastic reset component drives the valve core 200 to move away from the adjusting cover 182, thus achieving reset. The adjusting cover 182 can adjust the tightness of the elastic reset component. For example, when tightening is required, the adjusting cover 182 is turned clockwise, resulting in more screw turns between the adjusting cover 182 and the cylindrical protrusion 181. When loosening is required, the adjusting cover 182 is turned counterclockwise, resulting in fewer screw turns between the adjusting cover 182 and the cylindrical protrusion 181. Of course, the outer protrusion 180 can also be a protrusion integrally formed on the outer wall of the valve body 100. In this case, the clearance channel 140 extends into the outer protrusion 180, but does not penetrate the outer protrusion 180.

[0063] Optionally, the aforementioned elastic reset element is a spring 700, with one end of the spring 700 connected to the valve core 200 and the other end connected to the adjusting cover 182. Preferably, the spring 700 is a compression spring, so that the spring 700 always applies an elastic force to the valve core 200 toward the opening of the second channel 120. However, it should be noted that the elastic force applied by the compression spring to the valve core 200 toward the opening of the second channel 120 is relatively small, that is, the degree of compression of the compression spring is small, so that medical personnel can drive the blood collection needle 600 to push against the valve core 200 with a small pushing force. Of course, the aforementioned elastic reset element can also be an inflatable bladder.

[0064] In order to make the spring 700 extend and retract more stably within the aforementioned relief channel 140, in this embodiment, both the valve core 200 and the adjusting cover 182 are provided with protrusions, which are located in the relief channel 140, while the spring 700 is sleeved on the protrusions.

[0065] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope described in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An arterial blood collection needle assembly, characterized in that, include: The valve body (100) has a first channel (110), a second channel (120) and a third channel (130) inside. The outer wall of the valve body (100) is provided with a first liquid outlet (150), a second liquid outlet (160) and a liquid inlet (170). The first channel (110) passes through the first liquid outlet (150), the second channel (120) passes through the second liquid outlet (160), and the third channel (130) passes through the liquid inlet (170). A valve core (200) is slidably mounted in the second channel (120), and the valve core (200) is provided with a through hole (210) and a flow channel (220); An arterial puncture needle (300) is connected to the inlet head (170) via a connecting tube (310) and communicates with the third channel (130); A blood pressure monitor (400) is connected to the first dispensing head (150) and communicates with the first channel (110); A sealing cap (500) is connected to the second liquid outlet (160), and the sealing cap (500) seals the opening of the second channel (120); A blood collection needle (600) is connected to an insertion needle (620) for inserting a negative pressure blood collection tube via a conduit (610). When the blood collection needle (600) pierces the sealing cap (500) and extends into the second channel (120), the valve core (200) is pushed by the blood collection needle (600) to make the flow channel (220) connect the third channel (130) and the second channel (120). The valve core (200) is also connected to an elastic reset member. When the blood collection needle (600) is withdrawn from the sealing cover (500), the valve core (200) is driven to reset by the elastic reset member so that the through hole (210) connects the third channel (130) and the first channel (110).

2. The arterial blood collection needle assembly according to claim 1, characterized in that, The first channel (110), the second channel (120) and the third channel (130) form a "T" shaped channel. The second channel (120) is located between the first channel (110) and the third channel (130). The valve body (100) is also provided with a clearance channel (140) that is directly opposite to and communicates with the second channel (120). The valve core (200) extends into the clearance channel (140). When the flow channel (220) connects the third channel (130) and the second channel (120), the through hole (210) moves into the clearance channel (140) and blocks the through hole (210) through the side wall of the clearance channel (140); When the through hole (210) connects the third channel (130) and the first channel (110), the flow channel (220) moves into the second channel (120) and blocks the entrance of the flow channel (220) through the side wall of the second channel (120).

3. The arterial blood collection needle assembly according to claim 2, characterized in that, The outlet of the flow channel (220) faces the sealing cap (500), and a bracket (230) is provided in the outlet of the flow channel (220). The blood collection needle (600) inserted into the second channel (120) abuts against the bracket (230).

4. The arterial blood collection needle assembly according to claim 3, characterized in that, The sealing cap (500) is provided with an insertion hole (511) for inserting the blood collection needle (600), and the bracket (230) is provided with a positioning countersunk hole (240) corresponding to the insertion hole (511). The tip of the blood collection needle (600) inserted into the second channel (120) is placed in the positioning countersunk hole (240).

5. The arterial blood collection needle assembly according to claim 4, characterized in that, The sealing cap (500) includes: The cover (510) is screwed to the second liquid outlet (160), and the insertion hole (511) is provided on the cover (510); A rubber block (520) is bonded and fixed inside the cover (510), and the rubber block (520) is installed between the end face of the cover (510) and the second liquid outlet (160).

6. The arterial blood collection needle assembly according to any one of claims 2-5, characterized in that, The outer wall of the valve body (100) is also provided with an outer protrusion (180), the relief channel (140) extends into the outer protrusion (180), and the elastic reset member is installed in the relief channel (140).

7. The arterial blood collection needle assembly according to claim 6, characterized in that, The external protrusion (180) includes: A cylindrical protrusion (181) through which the clearance channel (140) passes; An adjusting cover (182) is screwed onto the cylindrical protrusion (181), the adjusting cover (182) blocks the opening of the clearance channel (140), and the elastic reset member is connected between the adjusting cover (182) and the valve core (200).

8. The arterial blood collection needle assembly according to claim 7, characterized in that, The elastic reset element is a spring (700), one end of which is connected to the valve core (200), and the other end of which is connected to the adjusting cover (182).

9. The arterial blood collection needle assembly according to claim 8, characterized in that, Both the valve core (200) and the adjusting cover (182) are provided with protrusions (900), and the spring (700) is sleeved on the protrusions (900).

10. The arterial blood collection needle assembly according to claim 4, characterized in that, Also includes: A sealing film (800) is attached to the sealing cover (500) after the blood collection needle (600) is withdrawn from the sealing cover (500), and the sealing film (800) blocks the insertion hole (511).

Images