Venous catheter device capable of being plugged

Abstract

The venous catheter device comprises a needle tube seat, an infusion catheter, an infusion catheter seat and a movable blocking component, a puncture channel is arranged in the needle tube seat, the movable blocking component is arranged in the puncture channel, an infusion channel is arranged in the infusion catheter seat, a conical cavity communicated with the infusion catheter is arranged at the far end of the needle tube seat, and the movable blocking component is arranged in the conical cavity. The infusion channel is communicated with the conical cavity, the movable plugging component comprises a cylindrical section and a conical plugging part, the cylindrical section is limited in the puncture channel in a sliding mode, and a connecting structure is arranged at the end of the cylindrical section and detachably connected with the push rod. According to the venous catheter device provided by the utility model, the movable plugging part can be driven to reciprocate between the first working position and the second working position, so that the conical cavity is completely plugged by the movable plugging part in the indwelling period without liquid medicine infusion, and blood cannot enter the conical cavity, the needle tube seat and the infusion catheter seat; the risk of thrombus formation in the inner cavity of the transfusion catheter seat is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a sealable venous catheter device. Background Art

[0002] Venipuncture and associated intravenous infusion are the most commonly used general techniques in various clinical departments. When the infusion time is long, a flexible venous catheter is most commonly used to be indwelled in the venous lumen. During indwelling, the flexible venous catheter eliminates the risk of the rigid needle tip piercing the vein; however, during the indwelling period without drug injection, blood coagulation is extremely likely to occur in the venous catheter and at the opening due to slow or stagnant local blood flow. Even measures such as flushing the catheter with heparin and other anticoagulants and normal saline cannot prevent the formation of thrombus in the inner cavity of the venous catheter. The detachment of the thrombus will lead to acute pulmonary embolism, endangering life. When the patient's limb activity is significant, blood is likely to enter the needle hub and the inner cavity of the venous catheter, further accelerating the formation of thrombus. Content of the Utility Model

[0003] The purpose of the utility model is to provide a sealable venous catheter device to solve the above deficiencies in the prior art.

[0004] To achieve the above purpose, the utility model provides the following technical solution:

[0005] A sealable venous catheter device includes a needle hub and an infusion catheter disposed at the distal end of the needle hub. An infusion catheter seat is obliquely disposed on one side of the needle hub. The infusion catheter is communicated with both the infusion catheter seat and the needle hub. A connecting tube is disposed at one end of the infusion catheter seat away from the infusion catheter. The device further includes a movable sealing member. A puncture channel is disposed in the needle hub. The movable sealing member is disposed in the puncture channel. An infusion channel is disposed in the infusion catheter seat. A tapered cavity communicated with the infusion catheter is disposed at the distal end of the needle hub. The infusion channel is communicated with the tapered cavity. A tapered sealing portion is disposed at the distal end of the movable sealing member. The proximal end of the movable sealing member is a cylindrical section with a size corresponding to the puncture channel. The cylindrical section is slidably restricted in the puncture channel. A connecting structure is disposed at the end of the cylindrical section. The connecting structure is detachably connected to a push rod. The movable sealing member is driven by the push rod to have a sealing state of sealing the tapered cavity and an open state of moving into the puncture channel.

[0006] In the above venous catheter device, sliding strips are disposed on the circumferential side wall of the cylindrical section, and axial sliding grooves are disposed on the inner wall of the puncture channel. The sliding strips are slidably restricted in the axial sliding grooves.

[0007] The above-mentioned venous catheter device, wherein there are a plurality of axial chutes, and the plurality of axial chutes are sequentially arranged at intervals along the circumferential direction of the puncture channel.

[0008] The above-mentioned venous catheter device, wherein there are a plurality of sliding bars, the plurality of sliding bars are sequentially arranged at intervals along the circumferential direction of the cylindrical section, and the sliding bars are respectively located in the axial chutes.

[0009] The above-mentioned venous catheter device, wherein the connecting structure includes an annular opening provided at the end of the cylindrical section, and a first magnetic attracting member is provided inside the annular opening.

[0010] The above-mentioned venous catheter device, wherein a circular push plate is provided at the end of the push rod, an annular member corresponding to the annular opening is provided on the circular push plate, a second magnetic attracting member is provided at the end of the annular member, and the magnetic properties of the second magnetic attracting member and the first magnetic attracting member are different.

[0011] The above-mentioned venous catheter device further includes a blocking ball, the blocking ball is connected to the conical blocking portion through a connecting wire, and a magnetic component is provided on the outer side wall of the blocking ball.

[0012] The above-mentioned venous catheter device further includes an arc-shaped sliding seat, which is slidably arranged on the needle tube seat and the infusion catheter, and the arc-shaped sliding seat is provided with a blocking ball capable of attracting and driving the magnetic component to move in the conical cavity.

[0013] In the above technical solution, the pluggable venous catheter device provided by the present invention includes a needle tube seat, an infusion catheter, an infusion catheter seat and a movable plugging component. A puncture channel is provided in the needle tube seat, the movable plugging component is arranged in the puncture channel, an infusion channel is provided in the infusion catheter seat, a conical cavity communicating with the infusion catheter is provided at the distal end of the needle tube seat, the infusion channel communicates with the conical cavity, and the movable plugging component includes a cylindrical section and a conical blocking portion provided on the cylindrical section. The infusion channel, the conical cavity and the infusion catheter communicate to form a flow channel for liquid to flow. The movable plugging component can be driven by a push rod, so that the movable plugging component reciprocates between a first working position and a second working position. During infusion, the movable plugging component is in the first working position to open the flow channel. After the infusion is completed, the movable plugging component is in the second working position to close the flow channel. In this way, during the indwelling period without drug infusion, the movable plugging component completely blocks the conical cavity, and blood cannot enter the conical cavity, the needle tube seat and the infusion catheter seat, reducing the risk of thrombus formation in the inner cavity of the infusion catheter seat. Description of the Drawings

[0014] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0015] Figure 1 One of the structural schematic diagrams of the occludable venous catheter device provided by the embodiment of the present utility model;

[0016] Figure 2 Another structural schematic diagram of the occludable venous catheter device provided by the embodiment of the present utility model;

[0017] Figure 3 The structural schematic diagram of the puncture channel provided by the embodiment of the present utility model.

[0018] Explanation of reference numerals:

[0019] 1. Syringe holder; 11. Puncture channel; 12. Conical cavity; 13. Conical connecting section; 14. Axial chute; 2. Infusion catheter; 3. Infusion catheter seat; 31. Connecting tube; 4. Movable occlusion component; 41. Cylindrical section; 42. Conical occlusion part; 43. Connecting structure; 44. Annular opening; 45. First magnetic component; 5. Push rod; 51. Circular push plate; 52. Annular part; 6. Occlusion ball; 61. Guide wire; 7. Arc-shaped sliding seat. Detailed implementation manners

[0020] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the following will further introduce the present utility model in detail in conjunction with the drawings.

[0021] Such as Figures 1 - 3As shown in the figure, the present utility model provides a sealable venous catheter device, which includes a syringe hub 1 and an infusion catheter 2 provided at the distal end of the syringe hub 1. An infusion catheter seat 3 is obliquely provided on one side of the syringe hub 1. The infusion catheter 2 is communicated with both the infusion catheter seat 3 and the syringe hub 1. A connecting tube 31 is provided at one end of the infusion catheter seat 3 away from the infusion catheter 2. It further includes a movable plugging member 4. A puncture channel 11 is provided in the syringe hub 1. The movable plugging member 4 is arranged in the puncture channel 11. An infusion channel is provided in the infusion catheter seat 3. A conical cavity 12 communicated with the infusion catheter 2 is provided at the distal end of the syringe hub 1. The infusion channel is communicated with the conical cavity 12. A conical plugging portion 42 is provided at the distal end of the movable plugging member 4. The proximal end of the movable plugging member 4 is a cylindrical section 41 whose size corresponds to the puncture channel 11. The cylindrical section 41 is slidably restricted in the puncture channel 11. A connecting structure 43 is provided at the end of the cylindrical section 41. The connecting structure 43 is detachably connected to the push rod 5. The movable plugging member 4 is driven by the push rod 5 to have a plugging state of plugging in the conical cavity 12 and an open state of moving into the puncture channel 11.

[0022] Specifically, for the convenience of description, the end of the syringe hub 1, the infusion catheter 2, and the infusion catheter seat 3 away from the operator is the distal end, and the end closer to the operator is the proximal end. The venous catheter device provided in this embodiment includes a venous catheter component and a movable plugging member 4 arranged inside the venous catheter component. The venous catheter component is composed of a syringe hub 1, an infusion catheter 2, and an infusion catheter seat 3 connected. The infusion catheter 2 is connected to the distal end of the syringe hub 1. The inside of the syringe hub 1 is hollow to form a puncture channel 11. The puncture channel 11 is communicated with the infusion catheter 2. An infusion catheter seat 3 is provided on one side of the syringe hub 1. A connecting tube 31 is provided at the proximal end of the infusion catheter seat 3. This is the structure of the existing venous catheter component and will not be elaborated here.

[0023] In this embodiment, an infusion channel is provided inside the infusion catheter base 3. A conical cavity 12 is provided inside the distal end of the needle base 1. The conical cavity 12 is in communication with the infusion catheter 2, the infusion channel inside the infusion catheter base 3, and the puncture channel 11. A movable plugging member 4 is arranged in the puncture channel 11 to plug the puncture channel 11. In this way, the infusion channel, the conical cavity 12, and the infusion catheter 2 are in communication to form a flow channel for liquid to flow. The movable plugging member 4 includes a cylindrical section 41 and a conical plugging portion 42 which are integrally arranged. The material and size of the movable plugging member 4 are set to meet the requirements so as not to affect the puncture operation. The conical plugging portion 42 is arranged corresponding to the conical cavity 12. The cylindrical section 41 is located in the puncture channel 11. The size and shape of the cylindrical section 41 correspond to those of the puncture channel 11, so that the cylindrical section 41 can seal the puncture channel 11. The cylindrical section 41 is slidably connected in the puncture channel 11. The movable plugging member 4 has two working positions when moving along the puncture channel 11: the first working position and the second working position. In the first working position, both the cylindrical section 41 and the conical plugging portion 42 are located inside the puncture channel 11. At this time, the conical cavity 12 is in an open state, and the movable plugging member 4 is in an open state, that is, the flow channel for liquid to flow formed by the communication of the infusion channel, the conical cavity 12, and the infusion catheter 2 is open. At this time, infusion operation can be carried out. In the second working position, the conical plugging portion 42 is located in the conical cavity 12, so that the conical cavity 12 is plugged and closed, and the movable plugging member 4 is in a plugged state. In this way, the flow channel for liquid to flow formed by the communication of the infusion channel, the conical cavity 12, and the infusion catheter 2 is closed, and infusion operation cannot be carried out.

[0024] In this embodiment, a connection structure 43 is provided at the proximal end of the cylindrical section 41. The connection structure 43 is arranged corresponding to the push rod 5. During use, the push rod 5 can be detachably installed on the connection structure 43. In this way, the movable plugging member 4 can be driven by the push rod 5, so that the movable plugging member 4 reciprocates between the first working position and the second working position. When performing infusion, the movable plugging member 4 is pushed to the first working position, and the infusion flow channel is opened. When it is necessary to end, the movable plugging member 4 is pushed to the second working position, and the conical plugging portion 42 plugs the conical cavity 12, so that the infusion flow channel is closed.

[0025] The pluggable venous catheter device provided by the utility model comprises a needle hub 1, an infusion catheter 2, an infusion catheter hub 3 and a movable plugging component 4. A puncture channel 11 is arranged in the needle hub 1, the movable plugging component 4 is arranged in the puncture channel 11, an infusion channel is arranged in the infusion catheter hub 3, a conical cavity 12 communicated with the infusion catheter 2 is arranged at the distal end of the needle hub 1, the infusion channel is communicated with the conical cavity 12, the movable plugging component 4 comprises a cylindrical section 41 and a conical plugging portion 42 arranged on the cylindrical section 41, the infusion channel, the conical cavity 12 and the infusion catheter 2 are communicated to form a flow channel for liquid to flow. The movable plugging component 4 can be driven by a push rod 5, so that the movable plugging component 4 reciprocates between a first working position and a second working position. During infusion, when the movable plugging component 4 is in the first working position, the flow channel is opened; after the infusion is finished, when the movable plugging component 4 is in the second working position, the flow channel is closed. In this way, during the indwelling period without drug infusion, the movable plugging component 4 completely plugs the conical cavity 12, and blood cannot enter the conical cavity 12, the needle hub 1 and the infusion catheter hub 3, reducing the risk of thrombus formation in the inner cavity of the infusion catheter hub 3.

[0026] In this embodiment, preferably, sliding strips are arranged on the circumferential side wall of the cylindrical section 41, axial sliding grooves 14 are arranged on the inner wall of the puncture channel 11, the sliding strips are slidably limited in the axial sliding grooves 14, there are multiple axial sliding grooves 14, and the multiple axial sliding grooves 14 are sequentially arranged at intervals along the circumference of the puncture channel 11; the axial sliding grooves 14 are arranged along the axial direction of the cylindrical section 41, the length of the axial sliding grooves 14 is less than the length of the puncture channel 11, but the axial sliding grooves 14 are flush with the puncture channel 11 at the proximal end of the puncture seat.

[0027] In this embodiment, preferably, there are multiple sliding strips, the multiple sliding strips are sequentially arranged at intervals along the circumference of the cylindrical section 41, and the sliding strips are respectively located in the axial sliding grooves 14 one by one. The movement of the sliding strips along the axial sliding grooves 14 can enable the movable plugging component 4 to move inside the puncture channel 11, so as to switch between the first working position and the second working position.

[0028] In this embodiment, preferably, the connecting structure 43 includes an annular opening 44 provided at the end of the cylindrical section 41. A first magnetic member is provided inside the annular opening 44. The first magnetic member is annular. A circular push plate 51 is provided at the end of the push rod 5. An annular member 52 corresponding to the annular opening 44 is provided on the circular push plate 51. The radial dimension of the annular member 52 is smaller than the dimension of the annular opening 44, so that the annular member 52 can be inserted into the annular opening 44. A second magnetic member is provided at the end of the annular member 52. The second magnetic member and the first magnetic member have different magnetic properties. When the annular member 52 is inserted into the annular opening 44, the first magnetic member and the second magnetic member attract each other, so that the cylindrical section 41 and the circular push plate 51 are attracted together. In this way, the moving plugging member 4 can be moved inside the puncture channel 11 through the push rod.

[0029] In this embodiment, preferably, it further includes a plugging ball 6 and an arc-shaped sliding seat 7. The plugging ball 6 is connected to the conical plugging portion 42 through a connecting wire 61. A magnetic member is provided on the outer side wall of the plugging ball 6. The arc-shaped sliding seat 7 is slidably provided on the syringe holder 1 and the infusion catheter 2. A magnetic body capable of attracting and driving the magnetic member is provided on the arc-shaped sliding seat 7. The syringe holder 1 includes a conical connecting section 13 connected to the infusion catheter 2. The radial dimension of the internal channel of the conical connecting section 13 gradually decreases. The two ends of the internal channel are respectively connected to the conical cavity 12 and the infusion catheter 2. The arc-shaped sliding seat 7 can slide outward along the syringe holder 1 and the conical connecting section 13. And when the arc-shaped sliding seat 7 moves along the outer sides of the syringe holder 1 and the conical connecting section 13, it can drive the plugging ball 6 to move inside the conical cavity 12 and the internal channel of the conical connecting section 13, so that the plugging ball 6 moves along the infusion catheter 2 to a preset position (the proximal end of the infusion catheter 2). At this time, the plugging ball 6 can plug the infusion catheter 2, and the size of the plugging ball 6 is larger than the size of the infusion catheter 2, which can prevent the plugging ball 6 from entering the infusion catheter 2. When an infusion operation needs to be performed, the moving plugging member 4 is pushed to the first working position, and the plugging ball 6 is moved through the arc-shaped sliding seat 7, so that the plugging ball 6 moves into the puncture channel 11 and fits on the conical plugging portion 42. At this time, the internal channels of the conical cavity 12 and the conical connecting section 13 are in an open state, that is, the infusion channel, the conical cavity 12 and the infusion catheter 2 are connected to form an open flow channel for liquid to flow. At this time, the infusion operation can be performed. Optionally, a winding structure for winding, retracting or releasing the guide wire 61 can also be provided inside the moving plugging member 4.

[0030] Only some exemplary embodiments of the present invention have been described above by way of illustration. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of the claims of the present invention.

Claims

1. A sealable venous catheter device, comprising a needle hub and an infusion catheter disposed at the distal end of the needle hub. An infusion catheter seat is obliquely disposed on one side of the needle hub. The infusion catheter is in communication with both the infusion catheter seat and the needle hub. A connecting tube is disposed at one end of the infusion catheter seat away from the infusion catheter, characterized in that, It further includes a movable sealing component. A puncture channel is provided in the syringe base, and the movable sealing component is arranged in the puncture channel. An infusion channel is provided in the infusion catheter base. A conical cavity communicating with the infusion catheter is provided at the distal end of the syringe base, and the infusion channel communicates with the conical cavity. A conical sealing portion is provided at the distal end of the movable sealing component. The proximal end of the movable sealing component is a cylindrical section with a size corresponding to the puncture channel, and the cylindrical section is slidably restricted in the puncture channel. A connection structure is provided at the end of the cylindrical section, and the connection structure is detachably connected to the push rod. The movable sealing component is driven by the push rod to have a sealing state of sealing in the conical cavity and an open state of moving into the puncture channel.

2. The venous catheter device according to claim 1, characterized in that, Sliding strips are provided on the circumferential side wall of the cylindrical section, and axial sliding grooves are provided on the inner wall of the puncture channel. The sliding strips are slidably restricted in the axial sliding grooves.

3. The venous catheter device according to claim 2, wherein, There are a plurality of the axial sliding grooves, and the plurality of axial sliding grooves are sequentially arranged at intervals along the circumference of the puncture channel.

4. The intravenous catheter device according to claim 3, wherein There are a plurality of the sliding strips, and the plurality of sliding strips are sequentially arranged at intervals along the circumference of the cylindrical section, and the sliding strips are respectively located in the axial sliding grooves.

5. The intravenous catheter device according to claim 1, wherein The connection structure includes an annular opening provided at the end of the cylindrical section, and a first magnetic component is provided inside the annular opening.

6. The venous catheter device according to claim 5, characterized in that, A circular push plate is provided at the end of the push rod. An annular member corresponding to the annular opening is provided on the circular push plate, and a second magnetic component is provided at the end of the annular member. The magnetic properties of the second magnetic component and the first magnetic component are different.

7. The intravenous catheter device according to claim 1, characterized in that, It further includes a sealing ball, and the sealing ball is connected to the conical sealing portion through a connecting wire. A magnetic component is provided on the outer side wall of the sealing ball.

8. The venous catheter device according to claim 7, wherein, It further includes an arc-shaped sliding seat, which is slidably arranged on the syringe base and the infusion catheter. A sealing ball capable of attracting and driving the magnetic component to move in the conical cavity is provided on the arc-shaped sliding seat.

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