Arterial catheterization transmural puncture needle

Abstract

The utility model relates to an arterial catheterization transmural puncture needle which comprises an inner needle core and an outer needle core, the inner needle core comprises a puncture section and a closed section connected with the puncture section, the puncture section is provided with a cavity, and an opening is formed in the side wall of the end, close to the closed section, of the puncture section; the outer sleeve is arranged on the piercing section in a sleeving mode, an elastic sealing piece is fixed to the end, close to the sealing section, of the outer sleeve, the sealing section is sleeved with the elastic sealing piece, the outer sleeve is connected with an outer connecting pipe, the outer sleeve is communicated with the outer connecting pipe, the outer connecting pipe is communicated with the piercing section through the opening, and the end, away from the outer sleeve, of the outer connecting pipe is connected with a porous plug. By arranging the sealing section and arranging the elastic sealing piece at the end, close to the sealing section, of the outer sleeve, blood is prevented from flowing out, and the technical problem that when a puncture needle penetrates into a human body in the prior art, the blood can flow out of the human body from an opening in the tail end of the puncture needle and is exposed out of the body or at the pipeline connecting position is solved.

Description

Technical Field

[0001] The present application relates to the field of medical devices and supplies, and in particular to a transmural puncture needle for arterial catheterization. Background Art

[0002] Invasive arterial pressure monitoring has been widely used in patients with shock, critical illness, intraoperative and postoperative monitoring of patients undergoing major surgery, and monitoring of other patients in high-risk situations. In addition to continuous dynamic monitoring of blood pressure, invasive arterial pressure monitoring can also be used for arterial blood gas analysis and routine blood sampling, which reduces the pain of repeated punctures for patients and provides convenience for nurses. Before invasive arterial pressure monitoring, the patient needs to undergo arterial puncture. The commonly used puncture method is the blind puncture method, which includes direct puncture and transmural puncture. The operation is convenient and simple, and the requirements for equipment are relatively low, so it is widely used in clinical practice.

[0003] In the related art, puncture is performed using a puncture needle with an open tail end. However, the tail end of the puncture needle is open. Due to the high pressure in the arterial blood, when the puncture needle is inserted, blood will flow out from the opening at the tail end of the puncture needle and be exposed to the outside of the body or the pipe connection, which can easily cause blood contamination and increase the patient's chance of blood infection. Summary of the invention

[0004] The present application provides an arterial catheter transmural puncture needle, which can solve the technical problem in the related art that when the puncture needle penetrates the human body, blood will gush out from the tail end opening of the puncture needle and be exposed to the outside of the body or the pipe connection, which is very likely to cause blood contamination and increase the patient's chance of blood infection.

[0005] In the first aspect, an embodiment of the present application provides an arterial catheter transmural puncture needle, which includes: an inner needle core, the inner needle core includes an insertion section and a closing section connected to the insertion section, the insertion section has a cavity, and the side wall of the insertion section close to the closing section has an opening; an outer sleeve, the outer sleeve is sleeved on the insertion section, an elastic sealing piece is fixed to the end of the outer sleeve close to the closing section, the elastic sealing piece is sleeved on the closing section, the outer sleeve is connected to an external connecting tube, the outer sleeve is communicated with the external connecting tube, and the external connecting tube is communicated with the insertion section through the opening, and a porous plug is connected to the end of the outer sleeve away from the outer sleeve.

[0006] In combination with the first aspect, in one embodiment, the external connecting pipe includes an arc-shaped pipe, one end of the arc-shaped pipe is fixed to the outer sleeve, and the other end is connected to a straight pipe, the straight pipe is communicated with the arc-shaped pipe, the straight pipe and the outer sleeve are spaced apart along an axial direction perpendicular to the outer sleeve, and the straight pipe is parallel to the outer sleeve.

[0007] In combination with the first aspect, in one embodiment, a connecting tube is sleeved on the outer circumference of the porous plug, and the connecting tube is threadedly connected to an end of the straight tube away from the arc tube.

[0008] In combination with the first aspect, in one implementation, the straight pipe section is installed with a one-way valve.

[0009] In combination with the first aspect, in one embodiment, the arterial catheter transmural puncture needle also includes a decompression fixing device, which includes at least two decompression patches, one side of which is fixed to the outer periphery of the elastic sealing piece, and at least two of the decompression patches are arranged on opposite sides of the elastic sealing piece.

[0010] In combination with the first aspect, in one embodiment, the arterial catheter transmural puncture needle also includes a fixed dressing: the fixed dressing has a perforation, the external connecting tube is passed through the perforation, and the fixed dressing is used to fix the elastic sealing member to the human body so that the elastic sealing member and the external connecting tube are located on opposite sides of the fixed dressing.

[0011] In combination with the first aspect, in one embodiment, a truncation opening is opened on one side of the fixed dressing, the truncation opening is communicated with the through-hole, and the external connection tube passes through the truncation opening into the through-hole.

[0012] In combination with the first aspect, in one embodiment, the fixed patch is divided by the cutout into a first adhesive surface and a second adhesive surface that are spaced apart from each other, and the first adhesive surface and the second adhesive surface are connected by an adhesive structure.

[0013] In combination with the first aspect, in one embodiment, the bonding structure includes: a first Velcro, the first Velcro is fixed to the first adhesive surface; a second Velcro, the second Velcro is fixed to the second needle surface, the first adhesive surface and the second adhesive surface are connected by adhering the first Velcro to the second Velcro, so that the first adhesive surface and the second adhesive surface at least partially overlap.

[0014] In combination with the first aspect, in one embodiment, a needle wing is connected to a side surface of the closed section.

[0015] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0016] By arranging a sealing section at one end of the inner needle core, blood will not flow out of the sealing section. An elastic sealing piece is arranged at one end of the outer sleeve close to the sealing section, which can also prevent blood from flowing out of the end of the outer sleeve. The opening of the puncture section and the connecting tube of the outer connecting tube can allow blood to flow into the outer connecting tube from the opening, and under the action of the porous plug connected to the end of the outer connecting tube, the gas in the puncture section, the outer sleeve and the outer connecting tube can be discharged, but the blood does not overflow from the outer connecting tube, which solves the technical problem in the related art that when the puncture needle penetrates the human body, blood will gush out from the opening at the tail end of the puncture needle and be exposed to the outside of the body or the pipe connection, which is very likely to cause blood contamination and increase the probability of blood infection in patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic diagram of the overall structure of the arterial catheter transmural puncture needle provided in an embodiment of the present application;

[0019] Figure 2 A schematic diagram of the overall structure of the inner needle core provided in an embodiment of the present application;

[0020] Figure 3 This is a schematic diagram of the overall structure of the fixed patch provided in an embodiment of the present application.

[0021] In the figure:

[0022] 1. inner needle core; 11. insertion section; 12. closing section; 121. needle wing; 13. opening;

[0023] 2. outer sleeve; 21. elastic closure;

[0024] 31. Arc pipe; 32. Straight pipe; 321. Check valve;

[0025] 4. Porous plug;

[0026] 5. Stress relief patch;

[0027] 6. Fixed patch; 61. Perforation; 62. Cut-off; 63. First adhesive surface; 631. First Velcro; 64. Second adhesive surface; 641. Second Velcro. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0029] The embodiment of the present application provides a transmural puncture needle for arterial catheterization, which can solve the technical problem in the related art that when the puncture needle penetrates the human body, blood will gush out from the opening at the tail end of the puncture needle and be exposed to the outside of the body or the pipe connection, which can easily cause blood contamination and increase the patient's chance of blood infection.

[0030] See also Figure 1 and Figure 2 As shown, an arterial catheter transmural puncture needle provided by an embodiment of the present application may include: an inner needle core 1, the inner needle core 1 includes a piercing section 11 and a closing section 12 connected to the piercing section 11, the piercing section 11 has a cavity, and the side wall of the piercing section 11 near the closing section 12 has an opening 13; an outer sleeve 2, the outer sleeve 2 is sleeved on the piercing section 11, and an elastic closing member 21 is fixed to the end of the outer sleeve 2 near the closing section 12, the elastic closing member 21 is fixed to the end of the outer sleeve 2 near the closing section 12, and the elastic closing member 21 is fixed to the end of the outer sleeve 2 near the closing section 12. The closure member 21 is sleeved on the closure section 12, and the outer sleeve 2 is connected to an external connecting tube. The outer sleeve 2 is communicated with the external connecting tube, and the external connecting tube is communicated with the piercing section 11 through the opening 13. That is, when the piercing section 11 pierces the artery, blood can flow into the external connecting tube from the cavity of the piercing section 11 through the opening 13. The end of the external connecting tube away from the outer sleeve 2 is connected to a porous plug 4. Since the end of the external connecting tube is connected to the porous plug 4, blood can be effectively prevented from overflowing from the external connecting tube.

[0031] In the embodiment of the present application, a sealing section 12 is provided at one end of the inner needle core 1, so that blood will not flow out of the sealing section 12, and arterial blood has a certain pressure. When one end of the puncture section 11 punctures the arterial blood vessel, the arterial blood will flow into the cavity of the puncture section 11. An elastic sealing member 21 is provided at one end of the outer sleeve 2 close to the sealing section 12. The elastic sealing member 21 can seal the end of the outer sleeve 2 close to the sealing section 12, thereby preventing blood from flowing out of the end of the outer sleeve 2. Since the other end of the puncture section 11 is connected to the sealing section 12, arterial blood will not flow to the sealing section 12. Since the opening of the puncture section 11 13 is connected to the external connecting tube, so at this time, arterial blood will flow into the external connecting tube through the opening 13 on the side wall of the puncture section 11. The porous plug 4 has the performance of being breathable and impermeable. Under the action of the porous plug 4 connected to the end of the external connecting tube, the gas in the puncture section 11, the outer sleeve 2 and the external connecting tube can be discharged, so that the arterial puncture can be carried out smoothly. Under the premise of ventilation, the blood does not overflow from the external connecting tube, which solves the technical problem that when the puncture needle penetrates the human body in the related art, the blood will gush out from the opening 13 at the tail end of the puncture needle and be exposed to the outside of the body or the pipeline connection, which is very likely to cause blood contamination and increase the patient's blood infection probability.

[0032] In some optional embodiments, the external connection tube includes an arc tube 31, one end of the arc tube 31 is fixed to the outer sleeve 2, and the other end is connected to a straight tube 32, the straight tube 32 is connected to the arc tube 31, and the arc tube 31 is also connected to the outer sleeve 2, the straight tube 32 and the outer sleeve 2 are spaced apart in a direction perpendicular to the axis of the outer sleeve 2, and the straight tube 32 is parallel to the outer sleeve 2, and the arc tube 31 is arranged so that the external connection tube and the outer sleeve 2 are not on the same axis, when the outer sleeve 2 is placed in the artery, the external connection tube can be spaced as much as possible from the human body, and the straight tube 32 is arranged in parallel with the outer sleeve 2, which can make it more convenient to connect the arterial pressure sensor through the straight section later. Preferably, when the outer sleeve 2 is placed in the artery, the straight tube 32 can be rotated and adjusted to any position that is convenient for connecting the arterial pressure sensor, and it is only necessary to make the external connection tube not contact the human skin.

[0033] In some optional embodiments, a connecting tube is provided on the outer periphery of the porous plug 4, and the connecting tube is threadedly connected to the end of the straight tube 32 away from the arc tube 31. The outer periphery of the porous plug 4 can be tightly fitted with the inner wall of the connecting tube. The connecting tube has threads, which can make it more convenient to fix the porous plug 4 on the straight tube 32 or remove it from the straight tube 32.

[0034] In some optional embodiments, the straight tube 32 is installed with a one-way valve 321. The opening or closing of the one-way valve 321 can control whether blood can flow from the arc tube 31 to the porous plug 4, which can be more conveniently controlled.

[0035] In some optional embodiments, the arterial catheter transmural puncture needle also includes a decompression fixing device, which includes at least two decompression patches 5, one side of each of which is fixed to the outer periphery of the elastic sealing member 21, and at least two of the decompression patches 5 are arranged on opposite sides of the elastic sealing member 21. In the embodiment of the present application, two decompression patches 5 are provided, and the decompression patches 5 gradually increase in size in the direction away from the elastic closure. The decompression patches 5 can be attached to the human body, and during the puncture process, the closed section 12 can be effectively prevented from directly contacting the skin of the limb, thereby providing a certain degree of protection for the skin.

[0036] See also Figure 3 As shown, in some optional embodiments, the arterial catheter transmural puncture needle also includes a fixed dressing 6: the fixed dressing 6 is provided with a perforation 61, the external connecting tube is passed through the perforation 61, and the fixed dressing 6 is used to fix the elastic sealing member 21 to the human body, so that the elastic sealing member 21 and the external connecting tube are located on opposite sides of the fixed dressing 6. It should be understood that the fixed dressing 6 can be when the puncture is initially completed and the straight section tube 32 has not yet been connected to the arterial pressure sensor, and the straight section is passed through the perforation 61 until the fixed dressing 6 passes through the arc tube 31, thereby attaching the fixed dressing 6 to the human skin. At this time, the fixed dressing 6 can be arranged on opposite sides of the arc tube 31, and part of the fixed dressing 6 is from The arc section extends in the direction close to the outer tube 2, and the other part extends from the arc section in the direction away from the outer tube 2. The fixed patch 6 extending in the direction away from the outer tube 2 can be to stick and fix the elastic sealing member 21 on the human skin, so that the outer tube 2 fixed with the elastic sealing member 21 is further fixed, effectively preventing it from rotating; the fixed patch 6 can also be inserted into the straight tube 32 or the arc tube 31 after the straight tube 32 is connected to the arterial pressure sensor, and then attached to the human body. The elastic sealing member 21 and the external connecting tube are located on the opposite sides of the fixed patch 6, that is, the external connecting tube is not in contact with the human skin at this time, which can reduce the pressure on the patient's skin and further reduce the risk of pressure sores in the patient's pressure area. At this time, the fixed patch 6 also has a certain fixing effect on the outer tube 2, which can effectively reduce the risk of the outer tube 2 falling out of the artery.

[0037] Preferably, a cut-off opening 62 is provided on one side of the fixed patch 6, the cut-off opening 62 is connected to the perforation 61, and the external connecting tube passes through the perforation 61 from the cut-off opening 62. That is, in the embodiment of the present application, after the straight tube 32 is connected to the arterial pressure sensor, the fixed patch 6 is passed directly through the arc tube 31 using the cut-off opening 62 until the arc tube 31 is located in the perforation 61, and then the fixed patch 6 is adhered to the skin. The provision of the cut-off opening 62 allows the fixed patch 6 to be fixed after the straight tube 32 is connected to the arterial pressure sensor, so that the straight tube 32 can be connected to the arterial pressure sensor as early as possible.

[0038] In some optional embodiments, the fixed dressing 6 is divided by the cutout 62 into a first adhesive surface 63 and a second adhesive surface 64 which are spaced apart from each other. The first adhesive surface 63 and the second adhesive surface 64 are connected by an adhesive structure. At this time, the first adhesive surface 63 and the second adhesive surface 64 can be arranged on the side of the fixed dressing 6 away from the outer sleeve 2, and the side of the fixed dressing 6 close to the outer sleeve 2 is directly adhered to the skin with a material that can adhere to the skin, so that the outer sleeve 2 that has been inserted into the arterial blood vessel can be fixed to a certain extent, thereby effectively reducing the occurrence of tube detachment and accidental extubation caused by patient agitation or other external forces.

[0039] Preferably, the bonding structure includes: a first Velcro 631, the first Velcro 631 is fixed to the first bonding surface 63; a second Velcro 641, the second Velcro 641 is fixed to the second bonding surface 64, the first bonding surface 63 and the second bonding surface 64 are connected by being bonded to the second Velcro 641 via the first Velcro 631, so that the first bonding surface 63 and the second bonding surface 64 at least partially overlap, and the first bonding surface 63 and the second bonding surface 64 are fixed by the cooperation of the first Velcro 631 and the second Velcro 641, which is more convenient and easy to operate. Preferably, when bonding, the first Velcro 631 is bonded to the second Velcro 641 to avoid the Velcro from contacting the patient's skin as much as possible.

[0040] Preferably, see Figure 2 As shown, the side of the closed section 12 is connected with a needle wing 121 , and medical personnel can operate the inner needle core 1 conveniently through the needle wing 121 .

[0041] The working principle of the embodiment of the present application is as follows:

[0042] The radial artery or dorsalis pedis artery is selected as the puncture site. After the puncture site is disinfected, the inner needle core 1 with an outer sleeve 2 on the periphery is inserted into the artery at an angle of 30-45 degrees to the skin along the direction of the artery. When the tip of the puncture section 11 enters the artery, a small amount of blood begins to enter the puncture section 11 under the pressure of the arterial blood and enters the tube mouth of the external connecting tube from the opening 13. At this time, the puncture section 11 is pushed forward by about 0.5 cm to penetrate the opposite side wall of the artery. Since the tip of the puncture section 11 passes through the blood vessel wall and enters the tissue, no more blood gushes back in the external connecting tube. The needle wing 121 is controlled to withdraw the inner needle core 1, and the elastic sealing member 21 seals the end of the outer sleeve 2. Then the outer sleeve 2 is slowly withdrawn to see The returned blood flows out from the tube mouth of the external connecting tube again, proving that the head end of the outer sleeve 2 enters the arterial blood vessel cavity. The outer sleeve 2 is pressed down to about 15°, and the outer sleeve 2 is pushed forward again, and the entire tube body enters the arterial blood vessel cavity. In this process, arterial blood flows to the external connecting tube through the opening 13 to the porous plug 4. At this time, the one-way valve 321 is closed, the porous plug 4 is rotated and twisted off, the external connecting tube is connected to the arterial pressure sensor pipeline, the pressure relief patch 5 is preliminarily fixed, the external connecting tube is adjusted to a suitable position, and then the fixing patch 6 is pasted and fixed. The external connecting tube passes through the perforation 61, and the first adhesive surface 63 and the second adhesive surface 64 are further fixed using the first Velcro 631 and the second Velcro 641.

[0043] In the description of the present application, it should be noted that the terms "upper", "lower", 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 application 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 application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0044] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0045] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. An arterial catheter transmural puncture needle, characterized in that: It includes: An inner needle core (1), the inner needle core (1) comprising a piercing section (11) and a closed section (12) connected to the piercing section (11), the piercing section (11) having a cavity, and a side wall of the piercing section (11) close to one end of the closed section (12) having an opening (13); An outer sleeve (2), the outer sleeve (2) is sleeved on the piercing section (11), an elastic sealing member (21) is fixed to the end of the outer sleeve (2) close to the sealing section (12), the elastic sealing member (21) is sleeved on the sealing section (12), the outer sleeve (2) is connected to an external connecting tube, the outer sleeve (2) is communicated with the external connecting tube, and the external connecting tube is communicated with the piercing section (11) through the opening (13), and the end of the external connecting tube away from the outer sleeve (2) is connected to a porous plug (4).

2. The arterial catheter transmural puncture needle according to claim 1, characterized in that: The external connecting pipe comprises an arc-shaped pipe (31), one end of the arc-shaped pipe (31) is fixed to the outer sleeve (2), and the other end is connected to a straight pipe (32), the straight pipe (32) is communicated with the arc-shaped pipe (31), the straight pipe (32) and the outer sleeve (2) are arranged at intervals along an axial direction perpendicular to the outer sleeve (2), and the straight pipe (32) is parallel to the outer sleeve (2).

3. The arterial catheter transmural puncture needle according to claim 2, characterized in that: The outer periphery of the porous plug (4) is sleeved with a connecting pipe, and the connecting pipe is threadedly connected to an end of the straight section pipe (32) away from the arc-shaped pipe (31).

4. The arterial catheter transmural puncture needle according to claim 2, characterized in that: The straight pipe (32) is installed with a one-way valve (321).

5. The arterial catheter transmural puncture needle according to claim 1, characterized in that: The arterial catheter transmural puncture needle also includes a decompression fixing device, which includes at least two decompression patches (5), one side of each of the decompression patches (5) is fixed to the outer periphery of the elastic sealing member (21), and at least two of the decompression patches (5) are arranged on opposite sides of the elastic sealing member (21).

6. The arterial catheter transmural puncture needle according to claim 1, characterized in that: The arterial catheter transmural puncture needle also includes a fixing patch (6): The fixed patch (6) is provided with a through hole (61), the external connecting tube is passed through the through hole (61), and the fixed patch (6) is used to fix the elastic sealing member (21) to the human body so that the elastic sealing member (21) and the external connecting tube are located on opposite sides of the fixed patch (6).

7. The arterial catheter transmural puncture needle according to claim 6, characterized in that: A truncation opening (62) is provided on one side of the fixed patch (6), the truncation opening (62) is communicated with the through hole (61), and the external connection tube passes through the truncation opening (62) into the through hole (61).

8. The arterial catheter transmural puncture needle according to claim 7, characterized in that: The fixed patch (6) is divided by the cut-off opening (62) into a first adhesive surface (63) and a second adhesive surface (64) which are spaced apart from each other. The first adhesive surface (63) and the second adhesive surface (64) are connected via an adhesive structure.

9. The arterial catheter transmural puncture needle according to claim 8, characterized in that: The bonding structure comprises: A first Velcro (631), wherein the first Velcro (631) is fixed to the first adhesive surface (63); A second Velcro (641), wherein the second Velcro (641) is fixed to the second adhesive surface (64), and the first adhesive surface (63) and the second adhesive surface (64) are connected by adhering the first Velcro (631) to the second Velcro (641), so that the first adhesive surface (63) and the second adhesive surface (64) at least partially overlap.

10. The arterial catheter transmural puncture needle according to claim 1, characterized in that: The side of the closing section (12) is connected with a needle wing (121).

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