Ultrasound intervention therapy deflection suction hose

Abstract

This utility model belongs to the field of medical device technology and relates to an ultrasound-guided interventional aspiration catheter, comprising a catheter body and a connector. The connector includes a connector body and a metal needle tube integrally formed at the front end of the connector body. The metal needle tube can be inserted into the tail end of the catheter body. The front end of the connector body is provided with a locking mechanism for fixing the tail end of the catheter body to the connector body. This catheter is inserted under ultrasound guidance for aspiration of accumulated fluid in the body. The catheter is a combined structure consisting of a catheter body and a connector, which are detachably connected. This allows for trimming and adjusting the length of the external section of the catheter body after insertion before installing the connector, which is beneficial for trimming the external section of the catheter to maintain a suitable length.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to a variable-direction suction tube for ultrasound interventional therapy. Background Technology

[0002] Ultrasonic interventional aspiration catheter refers to a medical device that allows for the insertion and aspiration of fluid accumulation under ultrasound guidance. It is primarily used for precise aspiration of cystic fluid, drainage of pus, and postoperative or loculated fluid accumulations. The general procedure for inserting the ultrasonic interventional catheter is as follows:

[0003] Ultrasound scanning is used to locate the lesion and plan the optimal and safest puncture path.

[0004] Local disinfection and anesthesia;

[0005] Under real-time ultrasound guidance, the puncture needle is first inserted near the target area;

[0006] A guidewire is introduced through a puncture needle, the puncture needle is withdrawn and the guidewire is left in place, and a soft tube is inserted along the guidewire.

[0007] Under ultrasound monitoring, the guidewire guides the flexible tube to change direction, so that the insertion end of the tube accurately reaches the optimal position in the lesion;

[0008] The guide wire is pulled out through the cannula, leaving the cannula in place. The cannula is then fixed near the puncture site on the body surface to prevent it from falling out.

[0009] The external connector of the tubing is sealed with a heparin cap, or connected to a drainage device to aspirate and drain accumulated fluid, or connected to a syringe to inject medication.

[0010] However, when placing a catheter, in order to prevent the outer section of the catheter from being too long and easily pulled off, the outer section of the catheter should be kept at an appropriate length, such as 5-7 cm; however, the existing catheters have a one-piece molded joint at the end, which makes it impossible to cut and adjust the length of the outer section of the catheter. Utility Model Content

[0011] To address the shortcomings of existing technologies, this invention proposes a variable-direction aspiration tubing for ultrasound interventional therapy. The tubing body and connector are detachably connected. After the tubing body is precisely inserted into the lesion using a guide wire to guide its direction, the length of the external section of the tubing body can be trimmed and adjusted before the connector is installed, which helps to maintain an appropriate length of the external section of the tubing body.

[0012] This utility model is achieved through the following technical solution:

[0013] An ultrasound-guided interventional aspiration tubing includes a tubing body and a connector. The connector includes a connector body and a metal needle tube integrally formed at the front end of the connector body. The metal needle tube can be inserted into the tail end of the tubing body. The front end of the connector body is provided with a locking mechanism for fixing the tail end of the tubing body to the connector body, which can strengthen the connection between the tail end of the tubing body and the metal needle tube, reduce the probability of the tubing body detaching from the metal needle tube axially, and enhance the sealing performance between the outer wall of the metal needle tube and the inner wall of the tail end of the tubing body to prevent leakage.

[0014] Furthermore, the metal needle tube has a tapered tubular structure with a front end outer diameter smaller than its rear end outer diameter, so that when it is inserted into the tube body, the tube body can expand to enhance the stability and sealing of the connection structure between the tube body and the metal needle tube.

[0015] Furthermore, the locking mechanism includes a reducing sleeve fitted around the outside of the metal needle tube. The front end of the reducing sleeve clamps the front end of the metal needle tube, which enhances the stability of the connection structure between the tube body and the metal needle tube and reduces the probability of the tube body detaching from the metal needle tube axially. The rear end of the reducing sleeve is engaged with the front end of the connector body, which is easy to install quickly and the reducing sleeve is not easy to detach from the connector body.

[0016] Furthermore, the locking mechanism includes a variable diameter sleeve fitted around the outside of the metal needle tube, with the front end of the variable diameter sleeve clamping the front end of the metal needle tube and the rear end of the variable diameter sleeve threadedly connected to the front end of the connector body to prevent the variable diameter sleeve from detaching from the connector body.

[0017] Furthermore, the inner wall of the front end of the variable diameter sleeve is integrally formed with a compression ring. The inner diameter of the compression ring is equal to the outer diameter of the tube body. After the metal needle tube is inserted into the tail end of the tube body and expands the tube body, when the rear end of the variable diameter sleeve is connected to the front end of the connector body, the compression ring can compress the expanded tube body to increase friction and improve the stability of the connection structure between the metal needle tube, the tube body and the variable diameter sleeve, making it difficult for the tube body to detach from the metal needle tube.

[0018] Furthermore, the tail end of the tube is provided with a scale structure. When leaving the tube, the remaining length of the external tube segment can be measured through the scale structure, which is more intuitive and makes it easier to cut the tail end of the tube and retain an appropriate length of external tube segment.

[0019] As can be seen from the above technical solution, the beneficial effects of the ultrasonic interventional therapy deflection suction tube provided by this utility model are as follows:

[0020] This flexible tube, inserted under ultrasound guidance, is used to aspirate accumulated fluid in the body. It is a combination of a tube body and a connector. During insertion, the connector is not connected to the tube body. Under ultrasound guidance, a guide wire guides the flexible, bendable tube to precisely insert into the lesion. After placement, the guide wire is withdrawn from the tube body, leaving the tube body in place. The tube body can retain an appropriate external length. Excess length is trimmed from the end of the tube body. Then, the metal needle tip of the connector is inserted into the end of the tube body, ensuring a tight connection. A locking mechanism on the connector secures the end of the tube body to the connector body. The tube body and connector are detachably connected, allowing for trimming and adjustment of the external length of the tube body after insertion before connector installation. This facilitates trimming the external tube body to maintain an appropriate length. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present utility model.

[0022] Figure 2 for Figure 1 A magnified schematic diagram of the local structure at point A in the middle.

[0023] Figure 3 This is a three-dimensional structural diagram of Embodiment 1 of the present utility model.

[0024] Figure 4 This is a structural schematic diagram of Embodiment 2 of the present invention.

[0025] The components in the diagram are named as follows: 1. Tube body; 2. Connector; 2.1. Connector body; 2.1.1. Annular groove; 2.2. Metal needle tube; 2.3. Reducing sleeve; 2.3.1. Front straight tube section; 2.3.2. Middle tapered tube section; 2.3.3. Rear straight tube section; 2.3.4. Extrusion ring; 2.3.5. Protrusion. Detailed Implementation

[0026] Example 1

[0027] A type of ultrasound-guided interventional aspiration tubing, such as Figures 1 to 3 As shown, it includes a tube body 1 and a connector 2. The connector 2 is mainly composed of a connector body 2.1, a metal needle tube 2.2 and a locking mechanism. The locking mechanism is specifically a variable diameter sleeve 2.3.

[0028] The tube body 1 is a flexible and bendable tubular structure made of medical-grade polymer materials such as medical-grade polyurethane and medical-grade silicone. It has been widely used in medical catheters and medical drainage tubes. During ultrasound-guided puncture and catheter placement, the guide wire can guide the flexible and bendable tube body 1 to change direction and accurately insert it into the lesion. After the tube body 1 is in place, the length of the external segment of the tube body 1 can be trimmed and adjusted.

[0029] The connector body 2.1 of the connector 2 is made of medical-grade plastic, which is hard and not easily deformed. The connector body 2.1 has a through-flow channel inside; such as Figure 2 As shown, the metal needle tube 2.2 is a stainless steel tube with a tapered tubular structure. Its front end outer diameter is smaller than its rear end outer diameter. The rear end of the metal needle tube 2.2 is integrally formed with the front end of the connector body 2.1 (specifically, integral injection molding). The interior of the metal needle tube 2.2 is connected to the internal flow channel of the connector body 2.1.

[0030] After the tail end of tube 1 is cut according to the length of the outer section, as follows: Figure 2 As shown, the metal needle tube 2.2 can be inserted into the tail end of the tube body 1. Based on the material characteristics of the tube body 1, the tapered tube structure of the metal needle tube 2.2 can expand the tail end of the tube body 1 when inserted into it, so as to enhance the stability and sealing of the connection structure between the tube body 1 and the metal needle tube 2.2.

[0031] like Figure 2 As shown, the reducing sleeve 2.3 includes a front straight tube section 2.3.1, a middle tapered tube section 2.3.2, and a rear straight tube section 2.3.3. The inner diameter of the rear straight tube section 2.3.3 is larger than the inner diameter of the front straight tube section 2.3.1, and the inner diameter of the front straight tube section 2.3.1 is larger than the outer diameter of the tube body 1, making it easier for the tube body 1 to be inserted into the reducing sleeve 2.3. After the tube body 1 is in place and the tail end of the tube body 1 is cut, the reducing sleeve 2.3 is fitted onto the tail end of the tube body 1, and then the tail end of the tube body 1 is connected to the metal needle tube 2.2. The reducing sleeve 2.3 is made of medical-grade plastic.

[0032] like Figure 2 As shown, an extrusion ring 2.3.4 is integrally formed on the inner wall of the connection between the front straight pipe section 2.3.1 and the middle tapered pipe section 2.3.2. The inner diameter of the extrusion ring 2.3.4 is equal to the outer diameter of the pipe body 1 (here, the outer diameter refers to the normal outer diameter of the pipe body 1 when it is not expanded). The extrusion ring 2.3.4 can cooperate with the front end of the metal needle tube 2.2 to clamp the pipe body 1 between the two, which can enhance the stability of the connection structure between the pipe body 1 and the metal needle tube 2.2 and reduce the probability of the pipe body 1 detaching from the metal needle tube 2.2 along the axial direction.

[0033] Specifically, before the metal needle tube 2.2 is inserted into the tail end of the tube body 1, the reducing sleeve 2.3 is first fitted onto the tail end of the tube body 1. At this time, the tail end of the tube body 1 has not yet been expanded by the metal needle tube 2.2, and the tube body 1 can pass through the compression ring 2.3.4. After the metal needle tube 2.2 is inserted into the tail end of the tube body 1 and expands the tube body 1, when the rear straight tube section 2.3.3 of the reducing sleeve 2.3 is connected to the front end of the connector body 2.1, the compression ring 2.3.4 can compress the expanded tube body 1 to increase friction and improve the stability of the connection structure between the metal needle tube 2.2, the tube body 1 and the reducing sleeve 2.3, so that the tube body 1 is not easy to detach from the metal needle tube 2.2.

[0034] The rear straight pipe section 2.3.3 is snapped into the front end of the connector body 2.1, which facilitates quick installation and prevents the reducing sleeve 2.3 from easily detaching from the connector body 2.1;

[0035] Specifically, such as Figure 2 As shown, the inner wall of the rear straight pipe section 2.3.3 is integrally formed with multiple protrusions 2.3.5 (specifically 2 to 4) evenly distributed in a circular shape around its central axis, such as... Figure 3 As shown, the outer wall of the front end of the connector body 2.1 has an annular groove 2.1.1 that engages with multiple protrusions 2.3.5. When the rear straight pipe section 2.3.3 is fitted onto the front end of the connector body 2.1, under the action of external force, the rear straight pipe section 2.3.3 can be pushed axially into the front end of the connector body 2.1, so that the multiple protrusions 2.3.5 on the inner wall of the rear straight pipe section 2.3.3 are engaged in the annular groove 2.1.1 on the connector body 2.1 to form a snap-fit. The above snap-fit ​​structure is a conventional snap-fit ​​structure. The above snap-fit ​​structure is used between the pen barrel and pen cap, and between the bottle body and bottle cap of an alcohol disinfectant bottle, and will not be described in detail here. Compared with the snap-fit ​​structures on the pen barrel and pen cap, and the bottle body and bottle cap, which are easy to pull apart, the protrusions 2.3.5 in this embodiment are higher and the annular groove 2.1.1 is deeper, so as to avoid being easily pulled apart.

[0036] To facilitate the cutting of the tail end of the tube body 1, a scale structure (not shown in the figure) is provided at the tail end of the tube body 1. When leaving the tube body 1, the length of the remaining external segment of the tube body 1 is measured by the scale structure, which is more intuitive and makes it easier to cut the tail end of the tube body 1 and retain an appropriate length of the external segment of the tube body 1.

[0037] Specifically, the scale structure is the conventional structure on a ruler, which is usually printed on the surface of the ruler. The scale structure on the ruler includes multiple main scales (the longest scale lines, marked with corresponding numbers such as 0, 1, 2, 3, etc.) printed at equal intervals of 1 cm length, secondary scales (scale lines of medium length that divide the main scale interval into two equal parts) printed in the middle between two adjacent main scales, and four smallest scales (the shortest scale lines, representing the smallest measurement unit of 1 mm) printed at equal intervals between the main scales and secondary scales.

[0038] In this embodiment, the above-mentioned scale structure has multiple main scales printed on the outer wall surface of the tail end of the tube 1 along its axial direction, with a length of 1 cm. A secondary scale is printed in the middle of two adjacent main scales. "0" is printed next to the first main scale starting from the tail end of the tube 1, and "1", "2", "3" and other numbers are printed next to the main scales every 1 cm, which facilitates the quick determination of the remaining length of the outer segment of the tube 1.

[0039] It should be noted that the tail end of the tube body 1 refers to the end outside the body after insertion, the front end of the tube body 1 refers to the end left in the lesion inside the body, and the front end of the connector body 2.1, the front end of the metal needle tube 2.2, and the front end of the reducing sleeve 2.3 all refer to the end closest to the front end of the tube body 1.

[0040] The specific procedure for inserting the catheter under ultrasound guidance to aspirate accumulated fluid is as follows:

[0041] First, following the existing ultrasound-guided puncture and catheterization procedure, the flexible and bendable catheter 1 is precisely inserted into the lesion under ultrasound guidance using a guidewire. After the catheter 1 is in place, the guidewire is pulled out through the catheter 1, leaving the catheter 1 in place.

[0042] Secondly, retain an appropriate length of the external tube 1, such as 5-7cm, and cut off the excess length of the tube 1 at the tail end;

[0043] Next, after the end of tube 1 is cut off, before tube 1 is expanded, first put the reducing sleeve 2.3 on the end of tube 1, and then insert the front end of metal needle tube 2.2 into the end of tube 1. The metal needle tube 2.2 expands the end of tube 1 to make the two tightly connected.

[0044] Next, install the reducing sleeve 2.3 and move the reducing sleeve 2.3 along the direction of the connector body 2.1. Insert the multiple protrusions 2.3.5 on the inner wall of the rear straight pipe section 2.3.3 of the reducing sleeve 2.3 into the annular groove 2.1.1 on the connector body 2.1 to form a snap-fit. At this time, the compression ring 2.3.4 on the inner wall of the reducing sleeve 2.3 compresses the outer wall of the expanded tube body 1 at the front end of the metal needle tube 2.2, making it difficult for the tube body 1 to detach from the metal needle tube 2.2.

[0045] Finally, connector 2 is connected to tube body 1 to form a complete hose. A heparin cap is connected to the rear end of the hose connector body 2.1 for sealing, or a drainage device is connected to aspirate and drain the accumulated fluid, or a syringe is connected to inject the drug solution. The subsequent use of the hose is the same as the existing operating procedures.

[0046] It should be noted that the interface at the rear end of the connector body 2.1 is a conventional interface on existing tubing that can be detachably connected to heparin caps, drainage devices, and syringes. This application does not involve any improvement to the existing interface, and will not be described in detail here.

[0047] Example 2

[0048] A variable-direction aspiration tubing for ultrasound interventional therapy differs from Example 1 in that:

[0049] The connection structures of the locking mechanisms are different, specifically, as follows: Figure 4As shown, the rear end of the reducing sleeve 2.3 is threadedly connected to the front end of the connector body 2.1. Compared with the snap-fit ​​connection method between the rear end of the reducing sleeve 2.3 and the front end of the connector body 2.1, the threaded connection method is used in this embodiment, which makes the connection structure more stable and reliable and can prevent the reducing sleeve 2.3 from detaching from the connector body 2.1 without human intervention.

[0050] Specifically, such as Figure 4 As shown, the inner wall of the rear straight pipe section 2.3.3 of the reducing sleeve 2.3 is provided with an internal thread, and the front end of the connector body 2.1 is provided with an external thread that matches the internal thread of the inner wall of the rear straight pipe section 2.3.3. In addition, the other structures of the reducing sleeve 2.3 (such as the extrusion ring 2.3.4) are the same as those of the reducing sleeve 2.3 in Embodiment 1, and will not be described again here.

Claims

1. A variable-direction aspiration tubing for ultrasound interventional therapy, comprising a tubing body (1) and a connector (2), characterized in that: The connector (2) includes a connector body (2.1) and a metal needle tube (2.2) integrally formed at the front end of the connector body (2.1). The metal needle tube (2.2) can be inserted into the tail end of the tube body (1). The front end of the connector body (2.1) is provided with a locking mechanism for fixing the tail end of the tube body (1) onto the connector body (2.1).

2. The ultrasonic interventional aspiration tubing according to claim 1, characterized in that: The metal needle tube (2.2) has a tapered tubular structure, with its front end outer diameter being smaller than its rear end outer diameter.

3. The ultrasonic interventional aspiration tubing according to claim 2, characterized in that: The locking mechanism includes a variable diameter sleeve (2.3) fitted around the outside of the metal needle tube (2.2); the front end of the variable diameter sleeve (2.3) clamps the front end of the metal needle tube (2.2) to the tube body (1), and its rear end is engaged with the front end of the connector body (2.1).

4. The ultrasonic interventional aspiration tubing according to claim 2, characterized in that: The locking mechanism includes a reducing sleeve (2.3) fitted on the outside of the metal needle tube (2.2); the front end of the reducing sleeve (2.3) is clamped to the front end of the metal needle tube (2.2) tube body (1), and its rear end is threadedly connected to the front end of the connector body (2.1).

5. The ultrasound-guided interventional aspiration tubing according to claim 3 or 4, characterized in that: The inner wall of the front end of the variable diameter sleeve (2.3) is integrally formed with an extrusion ring (2.3.4), and the inner diameter of the extrusion ring (2.3.4) is equal to the outer diameter of the tube body (1).

6. The ultrasonic interventional aspiration tubing according to claim 1, characterized in that: The tube (1) has a graduated structure at its tail end.

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