Blood return prevention artery puncture device

Abstract

According to the blood return prevention arterial puncture device, the blood return prevention mechanism is additionally arranged on the blood return prevention arterial puncture device, the blood return prevention mechanism can quickly and effectively block the path where blood continues to flow out after puncture succeeds, and therefore the possibility that the blood is sprayed out and causes environmental pollution is greatly reduced; as the blood return prevention mechanism can automatically complete a blood cutting function, medical personnel do not need to distract to carry out manual pressing operation, and the overall operation efficiency is improved; meanwhile, the need of manual pressing is eliminated, so that the patient does not need to bear extra pain and discomfort caused by pressing any more, the comfort degree in the treatment process is improved, and the emotion stability of the patient and the smooth proceeding of follow-up treatment are facilitated; the automatic blood return prevention function brought by the blood return prevention mechanism reduces the uncertainty caused by manual operation difference, so that each time of arterial puncture catheterization can follow a more standardized process, and the risk of complications caused by misoperation can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of medical supplies, and in particular to an arterial puncture device to prevent blood backflow. Background Art

[0002] Arterial puncture and catheterization technology has been widely used in clinical practice because it can monitor the patient's blood pressure changes in real time and continuously and facilitate the extraction of blood samples. The current arterial indwelling device usually consists of an internal steel needle core and an external indwelling catheter. The steel needle core part extends out of the tip of the indwelling catheter so that during the puncture process, the two can penetrate the arterial wall together. Once the puncture finds that arterial blood is flowing back and blood return can be seen in the window, it indicates that the outer sheath can be placed in the artery. Once the puncture is successful, the steel needle core will be withdrawn, and the indwelling catheter will remain in the artery, which is convenient for subsequent connection with arterial monitoring equipment or infusion devices.

[0003] However, during the steps of catheterization and removing the steel needle core to connect the connector, the high-pressure blood in the artery is very easy to spray out, bringing the risk of contamination. In order to deal with this problem, experienced medical staff are usually required to manually press the artery at the puncture point into the heart, but this method has the problem of inaccurate pressing position or insufficient force, which may still cause uncontrolled blood to spray out. In addition, this kind of pressing will not only make the patient feel pain and discomfort, but also require medical staff to press with the other hand to prevent the artery from spraying out while performing the catheterization connection with one hand, which undoubtedly increases the difficulty of the operation and affects the operating efficiency of medical staff. Summary of the invention

[0004] In view of this, the present invention proposes an arterial puncture device for preventing blood backflow, the purpose of which is to avoid blood spurting during arterial puncture and reduce the difficulty of operation for medical personnel.

[0005] The technical solution of the present invention is achieved in this way:

[0006] An anti-blood backflow arterial puncture device, comprising:

[0007] Indwelling component, puncture component and anti-blood backflow mechanism;

[0008] The retention component includes a retention tube and a retention seat;

[0009] The anti-blood backflow mechanism includes an outer tube, an inner tube, a check piece and a trigger connecting piece, one end of the outer tube is connected to the retention seat, the inner tube is arranged in the outer tube, both ends of the inner tube are sealed and connected to the inner wall of the outer tube, and the outer tube is provided with a plurality of through holes located on the outside of the inner tube; the check piece includes an annular main body sleeved on the outer tube, the annular main body is provided with a plurality of elastic extrusion sheets distributed along the circumferential direction, the elastic extrusion sheet includes a fixed end fixed to the annular main body and a free end passing through the through hole, the free end is obliquely extruded on the inner tube; the trigger connecting piece includes a push tube arranged in the outer tube and movably arranged along the axial direction, the push tube moves along the axial direction to push open the free end of the elastic extrusion sheet;

[0010] The puncture assembly comprises a hollow needle core and a puncture seat, and the hollow needle core is inserted into the inner tube and the indwelling tube.

[0011] As a further optional solution, the trigger connector also includes a connecting tube fixedly arranged on the outside of the push tube, a connecting cavity is provided between the connecting tube and the push tube, one end of the outer tube is arranged in the connecting cavity, and the outer tube is threadedly connected to the connecting tube.

[0012] As a further optional solution, a first connecting portion is provided at one end of the push tube away from the outer tube.

[0013] As a further optional solution, the outer wall of the connecting pipe is provided with a friction pattern.

[0014] As a further optional solution, the outer wall of the outer tube is provided with a limiting column extending in the radial direction, and the annular body is provided with a limiting guide hole for the limiting column to be inserted into;

[0015] The limiting guide hole penetrates the annular body in radial direction, and the limiting guide hole comprises a first hole section, a second hole section and a clamping hole portion which are sequentially distributed;

[0016] The first hole segment is a first hole segment arranged axially along the annular body, and a first end of the first hole segment is an open structure arranged at the lower edge of the annular body;

[0017] The second hole segment is arranged perpendicularly to the second hole segment, and the first end of the second hole segment is connected to the second end of the first hole segment;

[0018] The clamping hole portion is arranged at the second end of the second hole segment, the diameter of the clamping hole portion is the same as that of the limiting column, and the width of the second hole segment is smaller than the diameter of the clamping hole portion.

[0019] As a further optional solution, three elastic extrusion sheets are provided on the annular body, and the number of the perforations on the outer tube corresponds to the number of the elastic extrusion sheets.

[0020] As a further optional solution, at least three of the limiting columns and at least three of the limiting guide holes are provided respectively.

[0021] As a further optional solution, one end of the outer tube is threadedly connected to the retention seat.

[0022] As a further optional solution, a needle holding handle is provided on the retention seat.

[0023] Compared with the prior art, the anti-blood backflow arterial puncture device of the present application has at least the following beneficial effects:

[0024] 1. Automatically cut off blood flow and reduce the risk of contamination: The anti-blood backflow mechanism can quickly and effectively block the path for blood to continue to flow out during catheterization and external connection after successful puncture, thereby greatly reducing the possibility of blood spraying and causing environmental pollution, and improving the safety and hygiene standards of medical operations.

[0025] 2. Reduce the burden on medical staff and improve operational efficiency: Since the anti-blood backflow mechanism can effectively complete the blood cutoff function, medical staff no longer need to be distracted by manual pressing operations, which not only reduces their physical burden, but also allows them to concentrate on connecting monitoring sensors, thereby improving overall operational efficiency.

[0026] 3. Enhance patient comfort: Eliminating the need for manual compression means that patients no longer need to endure the additional pain and discomfort caused by compression, which improves the comfort during treatment, helps stabilize the patient's emotions and facilitates the smooth progress of subsequent treatment.

[0027] 4. Promote standardized operations and reduce complications: The automatic anti-blood backflow function brought by the anti-blood backflow mechanism reduces the uncertainty caused by differences in manual operations, so that each arterial puncture and catheterization can follow a more standardized process, which helps to reduce the risk of complications caused by improper operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 This is a schematic structural diagram of an anti-backflow arterial puncture device according to an embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of an explosion of an anti-blood backflow arterial puncture device according to an embodiment of the present invention;

[0031] Figure 3 is a structural schematic diagram of the anti-blood backflow mechanism (the inner tube is not shown);

[0032] Figure 4 Schematic diagram of explosion of the anti-blood backflow mechanism (inner tube not shown);

[0033] Figure 5 is a structural schematic diagram of the non-return member;

[0034] Figure 6 The figure is a cross-sectional schematic diagram of an anti-backflow arterial puncture device according to an embodiment of the present invention (the retention component is hidden).

[0035] In the figure: 1, indwelling assembly; 11, indwelling tube; 12, indwelling seat; 121, needle holding handle;

[0036] 2. puncture assembly; 21. hollow needle core; 22. puncture seat;

[0037] 3. Anti-blood-backflow mechanism; 31. Outer tube; 311. Perforation; 312. Limiting column; 32. Inner tube; 33. Check piece; 331. Annular body; 332. Elastic extrusion sheet; 332a. Fixed end; 332b. Free end; 333. Limiting guide hole; 333a. First hole section; 333b. Second hole section; 333c. Clamping hole; 34. Trigger connector; 341. Push tube; 3411. First connecting part; 342. Connecting tube; 343. Connecting cavity; 344. Sealing gasket. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] refer to Figure 1 and Figure 2 , an embodiment of the present invention shows an anti-blood backflow arterial puncture device, including a retention component 1, a puncture component 2 and an anti-blood backflow mechanism 3;

[0042] The retention assembly 1 includes a retention tube 11 and a retention seat 12; the anti-blood backflow mechanism 3 includes an outer tube 31, an inner tube 32, a check piece 33 and a trigger connector 34, one end of the outer tube 31 is connected to the retention seat 12, the inner tube 32 is arranged in the outer tube 31, both ends of the inner tube 32 are sealed and connected to the inner wall of the outer tube 31, and the outer tube 31 is provided with a plurality of through holes 311 located on the outside of the inner tube 32; the check piece 33 includes an annular body 331 sleeved on the outer tube 31, and the annular body 331 is provided with a plurality of elastic The elastic squeezing sheet 332 comprises a fixed end 332a fixed to the annular body 331 and a free end 332b passing through the through hole 311, and the free end 332b is obliquely squeezed on the inner tube 32; the trigger connecting piece 34 comprises a push tube 341 arranged in the outer tube 31 and axially movable, and the push tube 341 moves axially to push open the free end 332b of the elastic squeezing sheet 332; the puncture assembly 2 comprises a hollow needle core 21 and a puncture seat 22, and the hollow needle core 21 is penetrated in the inner tube 32 and the indwelling tube 11.

[0043] Specifically, Figure 6As shown, in the initial state, the hollow needle core 21 is inserted into the inner tube 32, and the inner tube 32 is a soft tube. Under the extrusion of the elastic extrusion sheet 332, the inner tube 32 is closed on the outer wall of the hollow needle core 21, so that the hollow needle core 21 can be clamped and fixed, thereby improving the position stability of the hollow needle core 21; after puncture, the hollow needle core 21 is withdrawn, and the inner tube 32 is further closed under the pressure of the elastic extrusion sheet 332, so that the flow path of the inner tube 32 is cut off, and no leakage occurs when the hollow needle core 21 is pulled out In the event of blood spurting out, the automatic anti-blood backflow function is realized; when it is necessary to connect an arterial monitoring device or an infusion device subsequently, the connector of the arterial monitoring device or the infusion device can be connected to the trigger connector 34, and then the position of the trigger connector 34 can be moved to make the push tube 341 move toward the elastic extrusion sheet 332 until the push tube 341 pushes the multiple elastic extrusion sheets 332 to an open state, and the inner tube 32 becomes conductive again, which is convenient for monitoring blood pressure, drawing blood samples, and other operations.

[0044] In this way, the anti-backflow arterial puncture device adds an anti-backflow mechanism 3, which can quickly and effectively block the path for blood to continue to flow out after a successful puncture. Medical personnel do not need to be distracted by manual pressing operations, thereby improving the success rate of puncture and the overall operating efficiency; at the same time, the need for manual pressing is eliminated, so that patients no longer need to endure the additional pain and discomfort caused by pressing, thereby improving the comfort during treatment; the automatic anti-backflow function brought by the anti-backflow mechanism 3 reduces the uncertainty caused by differences in manual operations, so that each arterial puncture and catheterization can follow a more standardized process, which helps to reduce the risk of complications caused by improper operation.

[0045] In the above scheme, the structure of the puncture assembly 2 can refer to the structure of the puncture assembly in a conventional arterial puncture device, and the puncture seat 22 is provided with a transparent visual window (not marked in the figure) and an exhaust device (not marked in the figure) to determine whether the hollow needle core 21 is accurately inserted into the arterial blood vessel.

[0046] In the above scheme, the outer tube 31, the check piece 33 and the trigger connector 34 can all be plastic parts, and their materials can be the same as the retention seat 12. The material of the inner tube 32 can be the same as that of a conventional infusion tube; the two ends of the inner tube 32 can be fixed to the outer tube 31 by hot melting, ultrasonic welding or the like.

[0047] In the above scheme, the outer tube 31 and the retention seat 12 are detachably assembled, such as threaded connection, so as to make the assembly of the anti-blood backflow mechanism 3 more convenient; in some embodiments, the outer tube 31 and the anti-backflow member 33 are respectively injection molded, such as Figure 4As shown, the inner tube 32 is first fixed inside the outer tube 31 , and then the check piece 33 is sleeved on the outer tube 31 from top to bottom until the elastic extrusion sheet 332 enters the through hole 311 .

[0048] In some embodiments, Figure 4 and Figure 6 As shown, the trigger connector 34 also includes a connecting tube 342 fixedly arranged on the outside of the push tube 341, a connecting cavity 343 is provided between the connecting tube 342 and the push tube 341, one end of the outer tube 31 is provided in the connecting cavity 343, and the outer tube 31 is threadedly connected to the connecting tube 342.

[0049] The connecting tube 342 and the push tube 341 are integrally formed, and the trigger connecting piece 34 is threadedly connected to the outer tube 31, so that the two can be easily kept relatively fixed in the axial direction, and the trigger connecting piece 34 is prevented from axially moving during the puncture operation, thereby causing the hollow needle core 21 to move. When it is necessary to make the push tube 341 push the elastic extrusion sheet 332 upward, the connecting tube 342 can be rotated to make the push tube 341 move in the axial direction.

[0050] In addition, a first connection portion 3411 is provided at one end of the push tube 341 away from the outer tube 31. The first connection portion 3411 is used to connect the joint of the arterial monitoring device or the infusion device. In this embodiment, the first connection portion 3411 is a threaded structure, and of course it is not excluded that conventional connection structures such as snap-fit ​​structures are used in other embodiments; it should be noted that this embodiment does not improve the structure of the puncture assembly, and the connection method between the puncture seat 22 of the puncture assembly 2 and the trigger connector 34 refers to the connection method between the retention assembly and the puncture assembly in the conventional arterial puncture device, for example, the puncture seat 22 is tightly plugged into the lower end of the push tube 341, or the puncture seat 22 is snap-fitted to the push tube 341.

[0051] In addition, if Figure 6 As shown, a sealing gasket 344 is provided in the connecting cavity 343. When the upper end of the push tube 341 pushes the elastic extrusion sheet 332, the lower end of the outer tube 31 is pressed on the sealing gasket 344; in this way, when the inner tube 32 is in the conducting state, the outer tube 31 and the trigger connecting piece 34 are in a sealed state to prevent liquid from leaking between the outer tube 31 and the trigger connecting piece 34. Of course, in other embodiments, the sealing gasket 344 may not be provided, and since both the outer tube 31 and the trigger connecting piece 34 are plastic parts, the end of the outer tube 31 may directly abut against the bottom of the connecting cavity 343 to achieve sealing.

[0052] In the above solution, in order to facilitate the rotation of the trigger connecting member 34, as shown in FIG. Figure 4As shown, the outer wall of the connecting pipe 342 is provided with a friction pattern.

[0053] In some embodiments, in order to facilitate the rapid assembly and fixation between the outer tube 31 and the check member 33, as shown in FIG. Figure 3-5 As shown, the outer wall of the outer tube 31 is provided with a limiting column 312 extending in the radial direction, and the annular body 331 is provided with a limiting guide hole 333 for the limiting column 312 to be inserted into; the limiting guide hole 333 radially penetrates the annular body 331, and the limiting guide hole 333 includes a first hole segment 333a, a second hole segment 333b and a clamping hole portion 333c that are sequentially distributed; the first hole segment 333a is a first hole segment 333a arranged axially along the annular body 331, and the first hole segment 333c is a second hole segment 333c. The first end of 33a is an open structure arranged at the lower edge of the annular body 331; the second hole segment 333b is vertically arranged with the second hole segment 333b, and the first end of the second hole segment 333b is connected with the second end of the first hole segment 333a; the clamping hole portion 333c is arranged at the second end of the second hole segment 333b, the diameter of the clamping hole portion 333c is the same as that of the limiting column 312, and the width of the second hole segment 333b is smaller than the diameter of the clamping hole portion 333c.

[0054] Specifically, when the check piece 33 is put on the outer tube 31 from top to bottom, the first end of the first hole section 333a is made to correspond to the position of the limiting column 312, so that the limiting column 312 enters the first hole section 333a. When the limiting column 312 is located at the second end of the first hole section 333a, the elastic extrusion sheet 332 is located at the height corresponding to the through hole 311. Then the check piece 33 is rotated to make the limiting column 312 pass through the second hole section 333b and be clamped in the clamping hole portion 333c. Since the width of the second hole section 333b is smaller than the diameter of the clamping hole portion 333c (that is, smaller than the diameter of the limiting column 312), the limiting column 312 cannot be separated from the clamping hole portion 333c without a huge rotational external force, thereby ensuring that the annular body 331 and the outer tube 31 remain relatively fixed. When the push tube 341 pushes the elastic extrusion sheet 332, the position of the annular body 331 remains stable.

[0055] In the above scheme, in order to ensure that the elastic extrusion sheet 332 has a stable extrusion ability on the inner tube 32, in this embodiment, three elastic extrusion sheets 332 are provided on the annular body 331, and the number of the perforations 311 on the outer tube 31 corresponds to the number of the elastic extrusion sheets 332. Of course, in other embodiments, the number of the elastic extrusion sheets 332 can be set to be more.

[0056] In the above solution, in order to ensure the connection and positioning between the outer tube 31 and the annular body 331, at least three of the limiting posts 312 and the limiting guide holes 333 are respectively provided. In this way, at least three limiting posts 312 are provided, which can provide a center positioning function, so that the outer tube 31 and the annular body 331 are coaxially arranged.

[0057] In the above scheme, in order to facilitate the operation of withdrawing the puncture assembly 2, as Figure 1 and Figure 2 As shown, the retention seat 12 is provided with a needle holding handle 121. When the puncture assembly 2 is withdrawn, the position of the retention assembly 1 can be fixed by holding the needle holding handle 121 to prevent the puncture assembly 2 from driving the retention assembly 1 to move.

[0058] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An anti-backflow arterial puncture device, characterized in that: include: Indwelling component, puncture component and anti-blood backflow mechanism; The retention component includes a retention tube and a retention seat; The anti-blood backflow mechanism includes an outer tube, an inner tube, a check piece and a trigger connector, one end of the outer tube is connected to the retention seat, the inner tube is arranged in the outer tube, both ends of the inner tube are sealed and connected to the inner wall of the outer tube, and the outer tube is provided with a plurality of through holes located on the outside of the inner tube; the check piece includes an annular main body sleeved on the outer tube, the annular main body is provided with a plurality of elastic extrusion sheets distributed along the circumferential direction, the elastic extrusion sheet includes a fixed end fixed to the annular main body and a free end passing through the through hole, the free end is obliquely extruded on the inner tube; the trigger connector includes a push tube arranged in the outer tube and movably arranged along the axial direction, the push tube moves along the axial direction to push open the free end of the elastic extrusion sheet; The puncture assembly comprises a hollow needle core and a puncture seat, and the hollow needle core is inserted into the inner tube and the indwelling tube.

2. The anti-backflow arterial puncture device according to claim 1, characterized in that: The trigger connector also includes a connecting tube fixedly arranged outside the push tube, a connecting cavity is provided between the connecting tube and the push tube, one end of the outer tube is arranged in the connecting cavity, and the outer tube is threadedly connected to the connecting tube.

3. The anti-backflow arterial puncture device according to claim 2, characterized in that: The push tube has a first connecting portion at one end away from the outer tube.

4. The anti-backflow arterial puncture device according to claim 2, characterized in that: The outer wall of the connecting pipe is provided with a friction pattern.

5. The anti-backflow arterial puncture device according to claim 1, characterized in that: The outer wall of the outer tube is provided with a limiting column extending in the radial direction, and the annular body is provided with a limiting guide hole for the limiting column to be inserted into; The limiting guide hole penetrates the annular body in radial direction, and the limiting guide hole comprises a first hole section, a second hole section and a clamping hole portion which are sequentially distributed; The first hole segment is a first hole segment arranged axially along the annular body, and a first end of the first hole segment is an open structure arranged at the lower edge of the annular body; The second hole segment is arranged perpendicularly to the second hole segment, and the first end of the second hole segment is connected to the second end of the first hole segment; The clamping hole portion is arranged at the second end of the second hole segment, the diameter of the clamping hole portion is the same as that of the limiting column, and the width of the second hole segment is smaller than the diameter of the clamping hole portion.

6. The anti-backflow arterial puncture device according to claim 5, characterized in that: There are three elastic extrusion sheets on the annular body, and the number of the perforations on the outer tube corresponds to the number of the elastic extrusion sheets.

7. The anti-backflow arterial puncture device according to claim 5, characterized in that: There are at least three of the limiting columns and the limiting guide holes, respectively.

8. The anti-backflow arterial puncture device according to claim 1, characterized in that: One end of the outer tube is threadedly connected to the retention seat.

9. The anti-backflow arterial puncture device according to claim 1, characterized in that: A needle holding handle is provided on the retention seat.

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