Blood sampling device

Abstract

The application provides a blood sampling device, which comprises a three-way valve, the three-way valve comprises a valve seat, the valve seat comprises a mounting groove and a first joint, a second joint and a third joint communicated with the mounting groove; the valve seat further comprises a first partition rib for partitioning a part of a blood sampling cavity into a first channel and a second channel, and another part of the blood sampling cavity is configured as a rotary channel; a valve core is inserted into the mounting groove and rotationally connected with the valve seat, the valve core comprises two arc-shaped grooves and a second partition rib arranged between the two arc-shaped grooves; a silica gel valve is arranged in the second joint and covers a part of the end of the blood sampling cavity, and a closed end of the silica gel valve has a hidden opening extending to the blood sampling cavity; the valve core is selectively rotated relative to the valve seat to make the first partition rib and the second partition rib in alignment and contact to form a blood sampling channel; and the valve core is selectively rotated relative to the valve seat to make the first partition rib and the second partition rib face away from each other to form a fluid channel. The device can avoid the generation of dead space in blood sampling and will not injure medical staff.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a blood collection device. Background Technology

[0002] Currently, medical staff typically perform blood collection by attaching a heparin cap to a three-way valve, creating a dedicated blood collection line. However, this dedicated line creates a dead space. Before blood collection, air can easily remain in this dead space, increasing the risk of air entering the patient's blood vessels. After collection, blood can remain in the dead space, potentially forming blood clots. Prolonged blood residue can also breed bacteria, harming the patient. To prevent blood from remaining in the dead space, medical staff repeatedly flush the blood collection line with saline solution. However, this repeated flushing can result in excessive saline entering the patient's body, increasing the burden on the heart.

[0003] In addition, when collecting blood through a heparin cap, an injection needle must be used, which poses a risk of accidentally injuring medical personnel and causing cross-infection during the blood collection process. Utility Model Content

[0004] The main purpose of this invention is to provide a blood collection device to solve the problems of existing needle-based blood collection devices, such as the presence of dead space, residual blood, or accidental injury to medical personnel.

[0005] A blood collection device is provided according to an embodiment of the present invention, comprising: a three-way valve, the three-way valve comprising: a valve seat, the valve seat comprising a mounting groove and a first connector, a second connector, and a third connector communicating with the mounting groove; wherein the first connector and the third connector are arranged in the same axial direction, and the second connector is arranged at the middle position between the first connector and the third connector; the valve seat further comprising a first dividing rib extending from the mounting groove to the second connector, the first dividing rib dividing a portion of a blood collection chamber disposed in the second connector into a first channel and a second channel, the other portion of the blood collection chamber being constructed as a rotary channel; and a valve core, the valve core being inserted into the mounting groove and rotatably connected to the valve seat, the valve core comprising a first arc-shaped groove and a second arc-shaped groove, and a valve core disposed in the first arc-shaped groove and the second arc-shaped groove. A second partition rib between the grooves; a silicone valve, the silicone valve being disposed in the second connector and covering a portion of the end of the blood collection chamber, the closed end of the silicone valve having a concealed opening extending into the blood collection chamber; wherein, the valve core selectively rotates relative to the valve seat to align the first partition rib and the second partition rib to form a blood collection channel, the blood collection channel including the first connector, the first arc-shaped groove, the first channel, the rotary channel, the second channel, the second arc-shaped groove, and the third connector connected in sequence; wherein, the valve core selectively rotates relative to the valve seat to turn the first partition rib and the second partition rib away from each other to form a fluid channel, the fluid channel including the first connector, the first arc-shaped groove, the mounting groove, the second arc-shaped groove, and the third connector connected in sequence.

[0006] The cross-sectional size of the first channel, the first partition rib, and the second channel is equal to the cross-sectional size of the rotary channel.

[0007] The second connector has a blood collection port at its end.

[0008] The first arc-shaped groove, the second partition rib, and the second arc-shaped groove are disposed on the side wall of the valve core along the circumferential direction of the valve core, and the edges of the first arc-shaped groove and the second arc-shaped groove away from the second partition rib are disposed opposite each other on the two side walls of the valve core.

[0009] Wherein, the first connector and the third connector are tapered connectors, the first connector is an inner tapered connector, and the third connector is an outer tapered connector.

[0010] The valve core rotates 360 degrees within the valve seat.

[0011] The second connector is connected to the blood collection tube, and the blood collection tube communicates with the blood collection chamber of the second connector through a hidden opening.

[0012] According to an embodiment of this utility model, a blood collection device is also provided, comprising: a valve seat, the valve seat including a mounting groove and a first connector, a second connector and a third connector communicating with the mounting groove, wherein the first connector and the third connector are arranged in the same axial direction, and the second connector is arranged at the middle position between the first connector and the third connector; the second connector has a first inner cavity and a second inner cavity communicating with each other, the valve seat also includes a first dividing rib extending from the mounting groove to the first inner cavity, the first dividing rib dividing the first inner cavity into a first channel and a second channel; a valve core, the valve core being inserted into the mounting groove and rotatably connected to the valve seat, the valve core including a first arc-shaped groove and a second arc-shaped groove and a second dividing rib arranged between the first arc-shaped groove and the second arc-shaped groove; a silicone valve, the silicone valve being arranged in the second... The silicone valve covers the inner wall of the second inner cavity of the connector, and the inner cavity of the silicone valve forms a rotary channel communicating with the first channel and the second channel. The closed end of the silicone valve has a hidden opening extending into the rotary channel. The valve core selectively rotates relative to the valve seat to align the first and second partition ribs to form a blood collection channel. The blood collection channel includes the first connector, the first arc-shaped groove, the first channel, the rotary channel, the second channel, the second arc-shaped groove, and the third connector, which are connected in sequence. The valve core selectively rotates relative to the valve seat to make the first and second partition ribs face away from each other to form a fluid channel. The fluid channel includes the first connector, the first arc-shaped groove, the mounting groove, the second arc-shaped groove, and the third connector, which are connected in sequence.

[0013] Wherein, the cross-sectional size of the first inner cavity is smaller than the cross-sectional size of the second inner cavity, and the cross-sectional size of the first inner cavity is equal to the cross-sectional size of the rotary channel.

[0014] The first arc-shaped groove, the second partition rib, and the second arc-shaped groove are disposed on the side wall of the valve core along the circumferential direction of the valve core, and the edges of the first arc-shaped groove and the second arc-shaped groove away from the second partition rib are disposed opposite each other on the two side walls of the valve core.

[0015] According to the technical solution of this utility model, by setting a first dividing rib in the second connector and a second dividing rib in the valve core, rotating the valve core to align the second dividing rib with the first dividing rib, the first connector of the three-way valve is connected to the third connector through the second connector to form a blood collection channel, thus avoiding the generation of dead space and preventing air or blood residue in the dead space; by rotating the valve core to make the second dividing rib opposite to the first dividing rib, the first connector of the three-way valve is connected to the third connector through the mounting groove to form a fluid channel, so that the blood collection device can be used for drug infusion. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of a three-way valve according to an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of a valve seat according to an embodiment of the present utility model;

[0019] Figure 3 This is a cross-sectional schematic diagram of a three-way valve according to an embodiment of the present utility model;

[0020] Figure 4 This is a schematic diagram of the valve core according to an embodiment of the present utility model;

[0021] Figure 5 This is a cross-sectional schematic diagram of the shell according to an embodiment of the present utility model;

[0022] Figure 6 This is a cross-sectional schematic diagram of a silicone valve according to an embodiment of the present utility model;

[0023] Figure 7 This is another cross-sectional schematic diagram of a three-way valve according to an embodiment of the present utility model. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. 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 embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] The technical solutions provided by the various embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0026] According to an embodiment of the present invention, a needleless blood collection device without dead space is provided, which includes: a three-way valve and a needleless blood collection tube, wherein the needleless blood collection tube can also be called a blood collection tube. Two connectors of the three-way valve arranged in the same axial direction can be externally connected to medical devices for blood collection or drug infusion, such as indwelling needles or syringes. The third connector of the three-way valve can be connected to the blood collection tube to realize blood collection.

[0027] Reference Figures 1-3The three-way valve includes a valve seat 1 and a valve core 2 inserted into the valve seat 1. The valve seat 1 and valve core 2 are interference-fitted, and the valve core 2 can rotate 360 ​​degrees within the valve seat 1. The valve seat 1 includes a mounting groove 11 and a first connector 12, a second connector 13, and a third connector 14 communicating with the mounting groove 11. The first connector 12, the second connector 13, and the third connector 14 are arranged in the same horizontal plane. Specifically, the first connector 12 and the third connector 14 are arranged in the same axial direction, and the second connector 13 is perpendicular to the first connector 12 and the third connector 14. In this embodiment, the first connector 12 can be an internal conical connector with a taper of 6:100. The end of the first connector 12 has threads for connecting a medical device such as an indwelling needle (not shown). The indwelling needle can communicate with the first connector 12 to form a passage for blood drawing or infusion. The third connector 14 can be an external conical connector with a taper of 6:100. The third connector 14 is provided with a conical protrusion 141. A locking cap 5 is also movably connected to the third connector 14. The locking cap 5 is locked onto the third connector 14 by preventing backflow through the conical protrusion 141 so that the third connector 14 can be connected to a medical device such as a syringe (not shown) or externally connected to a container containing liquid medicine.

[0028] Reference Figure 2 , Figure 3 and Figure 5 The second connector 13 includes a connector portion extending outward from the valve seat 1 and a housing 3 connected to the connector portion. The connector portion has a boss at its end, and the housing 3 has a recess at its proximal end that matches the boss. Through the mating connection between the boss and the recess, the connector portion and the housing 3 form a waterproof sealing structure. The connector portion and the housing 3 can be connected together by ultrasonic welding. A blood collection port 31 is provided at the end of the housing 3, and an external thread is provided around the blood collection port 31. A needleless blood collection tube (not shown) can be connected to the blood collection port 31 through the external thread. For easy visibility and to facilitate connection between the housing 3 and the needleless blood collection tube by medical personnel, the housing 3 can be entirely red.

[0029] Reference Figure 2 , Figure 3 and Figure 6The connector and housing 3 together form the internal space of the second connector 13. A silicone valve 4 is also provided in the second connector 13. The shape of the silicone valve 4 is adapted to the end shape of the second connector. The silicone valve 4 includes a closed end, an open end, and an inner cavity communicating with the open end. When the silicone valve 4 is engaged in the second connector 13, the open end of the silicone valve 4 is tightly fitted with the annular plane 131 in the connector, thereby forming a blood collection chamber communicating with the mounting groove 11 in the second connector 13. The front half of the blood collection chamber is located in the connector, and the rear half of the blood collection chamber is covered by the silicone valve 4. The valve seat also includes a first dividing rib 132 extending from the mounting groove 11 towards the connector. The first dividing rib 132 extends to the annular plane 131 and ends there, thereby dividing the front half of the blood collection chamber into two independent channels 133 and 134. The rear half of the blood collection chamber is a rotary channel 135 for connecting channels 133 and 134. That is, when liquid flows into the second connector 13 through one channel of the blood collection chamber, it can turn in the rotary channel and flow out of the second connector 13 through the other channel of the blood collection chamber. The cross-sectional size of the first dividing rib 132, channel 133, and channel 134 is equal to the cross-sectional size of the rotary channel 135, thereby avoiding the formation of dead space structures in the blood collection chamber. The closed end of the silicone valve 4 is provided with a hidden opening 41. In this embodiment, the hidden opening 41 can be a slit extending into the blood collection chamber. When not subjected to external pressure, the slit is in a sealed state. When the Luer cone tip of the needleless blood collection tube is inserted into the blood collection port 31 of the housing 3, the needleless blood collection tube squeezes the silicone valve 4, causing the slit on the silicone valve 4 to open, and the needleless blood collection tube communicates with the inner cavity of the silicone valve 4. When the needleless blood collection tube is pulled out, the slit closes again and returns to a sealed state. In this embodiment, the slit can be a straight slit, a cross slit, or other shaped slits to accommodate different needleless blood collection tubes.

[0030] Reference Figure 3 and Figure 4The valve core 2 has two adjacent arc-shaped grooves 21 and 22 (a first arc-shaped groove and a second arc-shaped groove) on its sidewall. The arc-shaped grooves 21 and 22 are arranged circumferentially on the sidewall of the valve core 2. A second dividing rib 23 is provided between the arc-shaped grooves 21 and 22, and the second dividing rib 23 is arranged radially on the valve core 2. The edges of the arc-shaped grooves 21 and 22 away from the second dividing rib 23 are arranged opposite each other on the two sidewalls of the valve core. That is, the arc-shaped grooves 21 and 22 cover at least more than half of the sidewall of the valve core 2 along its circumferential direction, so that the edges of the arc-shaped grooves 21 or 22 are aligned with the first connector 12 or the third connector 14, forming a sealed channel structure. A handle 24 is also provided on the top of the valve core 2 for rotating the valve core 2. The handle 24 is perpendicular to the valve core 2, and a raised "OFF" mark can be provided on the upper surface of the handle 24. For visibility, the valve core 2 can be entirely red. The handle 24 and the second partition rib 23 are set at a fixed angle (e.g., 180 degrees). When the valve core 2 is inserted and fixed in the mounting groove 11 of the valve seat 1, the arc grooves 21 and 22 are at the same horizontal level as the three connectors of the three-way valve. When the valve core 2 is rotated so that the handle 24 faces away from the second connector 13, the second partition rib 23 of the valve core 2 aligns and contacts the first partition rib 132 of the second connector 13. The first connector 12 is connected to the channel 133 through the arc groove 21. The channel 133 is connected to the channel 134 through the rotary channel 135. The channel 134 is connected to the third connector 14 through the arc groove 22, thus forming a blood collection channel in the three-way valve that allows unidirectional flow of liquid without dead space. When the valve core 2 is rotated so that the handle 24 faces the second connector 13, the second partition rib 23 of the valve core 2 will not contact the side wall of the mounting groove 11. At this time, the first connector 12 is connected to the third connector 14 through the arc groove 21, the mounting groove 11 and the arc groove 22, thus forming a fluid channel in the three-way valve that allows unidirectional flow of liquid without dead space.

[0031] In this embodiment, the valve seat 1, the housing 3, and the locking cap 5 are all made of medical-grade polycarbonate, the valve core 2 is made of high-density polyethylene, and the silicone valve 4 is made of medical-grade silicone.

[0032] In practical use, when a patient needs blood drawn, the handle 24 is first rotated to the opposite direction to the second connector 13 to form a blood collection channel. The patient's proximal blood flows sequentially through the first connector 12, the second connector 13, and the third connector 14 into the syringe. Then, the needleless blood collection tube is connected to the second connector 13, and the tube draws blood from the patient through the collection chamber of the second connector 13. The blood collection channel can not only be configured according to… Figure 3The arrows indicate the blood collection function. After blood collection, the fluid can flow in the opposite direction to the arrows to return the proximal blood to the patient, or flush the blood collection device via an external flushing device to prevent thrombosis. When the patient needs intravenous infusion or blood transfusion alone, the handle 24 can be turned to the same direction as the second connector 13 to form a fluid channel. The infusion or blood transfusion device is then connected to the second connector 13, and the fluid flows sequentially through the third connector 14, the mounting groove 11, and the first connector 12 into the patient's body. Similarly, the fluid channel can not only flow in the opposite direction to the arrows but also... Figure 7 The arrows indicate the direction of drug or blood infusion. Liquid can also flow in the opposite direction to achieve proximal blood collection or other functions. In other words, although the liquid flows in one direction in both the blood collection channel and the fluid channel, the flow direction can be either from the first connector to the third connector or from the third connector to the first connector.

[0033] According to an embodiment of this utility model, a blood collection device is also provided, comprising: a valve seat, a valve core, and a silicone valve. The structures of the valve core and the silicone valve are consistent with those described above and will not be repeated here. The structural difference between this embodiment and the previous embodiment is that the internal space of the second connector of the valve seat includes a first inner cavity and a second inner cavity that are connected, with the cross-sectional size of the first inner cavity being smaller than that of the second inner cavity. The mounting groove of the valve seat communicates with the second inner cavity through the first inner cavity. A first dividing rib extends from the mounting groove into the first inner cavity, thereby dividing the first inner cavity into two independent channels. The silicone valve is fitted in the second inner cavity and is tightly fitted to the inner wall of the second inner cavity. The inner cavity of the silicone valve forms a rotary channel, which communicates with the two channels of the first inner cavity, so that after the liquid flows into the second connector through one channel of the first inner cavity, it turns in the rotary channel and flows out of the second connector through the other channel of the first inner cavity. To avoid dead space, the cross-sectional size of the first inner cavity is equal to the cross-sectional size of the rotary channel.

[0034] By connecting a medical device such as an indwelling needle to the first connector of the valve seat, a needleless blood collection tube to the second connector, and a syringe to the third connector, the needleless blood collection tube is positioned in the middle of the blood collection channel rather than at the end, thus avoiding dead space. This blood collection device can not only collect blood samples from patients using needleless blood collection tubes, but also store proximal blood from the patient in the syringe before collection and then reinfuse it into the patient after collection, preventing iatrogenic blood loss complications.

[0035] According to the embodiments of this application, by setting a first partition rib in the valve seat and a second partition rib in the valve core, rotating the valve core to align the second partition rib with the first partition rib, the first connector of the three-way valve is connected to the third connector through the second connector to form a blood collection channel, thereby avoiding the problem of dead space easily generated by a separate external blood collection device; after blood collection, the blood collection device can also be rinsed with physiological saline through the blood collection channel to avoid the problem of blood residue, and since there is no dead space, this blood collection device does not need to be rinsed repeatedly, avoiding excessive saline entering the patient's body; by rotating the valve core to make the second partition rib opposite to the first partition rib, the first connector of the three-way valve is connected to the third connector through the mounting groove to form a fluid channel, thereby providing an additional channel for infusing drugs or blood transfusions; in addition, this device uses needleless blood collection tubes during blood collection, avoiding the possibility of needlestick injuries to medical personnel caused by using injection needles to collect blood, reducing the risk of occupational exposure and cross-infection for medical personnel.

[0036] Although this disclosure has been described in detail with reference to specific embodiments thereof, those skilled in the art will understand that various changes and modifications may be made therein without departing from the spirit and scope of the embodiments. Therefore, this disclosure is intended to cover modifications and variations thereof, and any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of the claims of this disclosure and their equivalents.

[0037] Furthermore, features disclosed in the foregoing description, claims, or drawings, expressed in their specific form or according to the manner of performing the disclosed function or the method or process for obtaining the disclosed result, may, as appropriate, be used alone or in any combination of these features to implement the present invention in their different forms. Specifically, one or more features of any embodiment described herein may be combined with one or more features of any other embodiment described herein.

[0038] Protection may also be sought for any features disclosed in any one or more public documents combined with this disclosure and / or merged by reference.

Claims

1. A blood collection device, characterized in that, include: A three-way valve, the three-way valve comprising: The valve seat includes a mounting groove and a first connector, a second connector, and a third connector communicating with the mounting groove; wherein the first connector and the third connector are arranged in the same axial direction, and the second connector is arranged at the middle position between the first connector and the third connector; the valve seat also includes a first partition rib extending from the mounting groove to the second connector, the first partition rib dividing a portion of the blood collection chamber arranged in the second connector into a first channel and a second channel, and the other portion of the blood collection chamber is constructed as a rotary channel; The valve core is inserted into the mounting groove and rotatably connected to the valve seat. The valve core includes a first arc-shaped groove and a second arc-shaped groove, as well as a second partition rib disposed between the first arc-shaped groove and the second arc-shaped groove. A silicone valve is disposed in the second connector and covers a portion of the end of the blood collection chamber, the closed end of the silicone valve having a concealed opening extending into the blood collection chamber; The valve core selectively rotates relative to the valve seat to align the first partition rib with the second partition rib to form a blood collection channel. The blood collection channel includes the first connector, the first arc-shaped groove, the first channel, the rotary channel, the second channel, the second arc-shaped groove, and the third connector, which are connected in sequence. The valve core selectively rotates relative to the valve seat, causing the first and second partition ribs to move away from each other to form a fluid channel. The fluid channel includes the first connector, the first arc-shaped groove, the mounting groove, the second arc-shaped groove, and the third connector, which are connected in sequence.

2. The blood collection device according to claim 1, characterized in that, The cross-sectional size formed by the first channel, the first partition rib, and the second channel is equal to the cross-sectional size of the rotary channel.

3. The blood collection device according to claim 1, characterized in that, The second connector has a blood collection port at its end.

4. The blood collection device according to claim 1, characterized in that, The first arc-shaped groove, the second dividing rib, and the second arc-shaped groove are disposed on the side wall of the valve core along the circumferential direction of the valve core, and the edges of the first arc-shaped groove and the second arc-shaped groove away from the second dividing rib are disposed opposite each other on the two side walls of the valve core.

5. The blood collection device according to claim 1, characterized in that, The first connector and the third connector are tapered connectors, the first connector is an inner tapered connector, and the third connector is an outer tapered connector.

6. The blood collection device according to claim 1, characterized in that, The valve core rotates 360 degrees within the valve seat.

7. The blood collection device according to claim 1, characterized in that, The second connector is connected to the blood collection tube, and the blood collection tube communicates with the blood collection chamber of the second connector through a hidden opening.

8. A blood collection device, characterized in that, include: The valve seat includes a mounting groove and a first connector, a second connector, and a third connector communicating with the mounting groove. The first connector and the third connector are arranged in the same axial direction, and the second connector is located at the middle position between the first connector and the third connector. The second connector has a first inner cavity and a second inner cavity that are connected to each other. The valve seat also includes a first partition rib extending from the mounting groove to the first inner cavity, which divides the first inner cavity into a first channel and a second channel. The valve core is inserted into the mounting groove and rotatably connected to the valve seat. The valve core includes a first arc-shaped groove and a second arc-shaped groove, as well as a second partition rib disposed between the first arc-shaped groove and the second arc-shaped groove. A silicone valve is disposed in the second inner cavity of the second connector and covers the inner wall of the second inner cavity. The inner cavity of the silicone valve forms a rotary channel communicating with the first channel and the second channel. The closed end of the silicone valve has a hidden opening extending into the rotary channel. The valve core selectively rotates relative to the valve seat to align the first partition rib with the second partition rib to form a blood collection channel. The blood collection channel includes the first connector, the first arc-shaped groove, the first channel, the rotary channel, the second channel, the second arc-shaped groove, and the third connector, which are connected in sequence. The valve core selectively rotates relative to the valve seat, causing the first and second partition ribs to move away from each other to form a fluid channel. The fluid channel includes the first connector, the first arc-shaped groove, the mounting groove, the second arc-shaped groove, and the third connector, which are connected in sequence.

9. The blood collection device according to claim 8, characterized in that, The cross-sectional size of the first inner cavity is smaller than that of the second inner cavity, and the cross-sectional size of the first inner cavity is equal to that of the rotary channel.

10. The blood collection device according to claim 8, characterized in that, The first arc-shaped groove, the second dividing rib, and the second arc-shaped groove are disposed on the side wall of the valve core along the circumferential direction of the valve core, and the edges of the first arc-shaped groove and the second arc-shaped groove away from the second dividing rib are disposed opposite each other on the two side walls of the valve core.

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