Medical indwelling catheter capable of being dredged

Abstract

The utility model provides a medical indwelling catheter capable of being dredged. The medical indwelling catheter comprises a catheter body, an extrusion membrane cavity is formed in a cavity of the catheter body, the head end of the extrusion membrane cavity is a blind end at the head end of the catheter body, the tail end of the extrusion membrane cavity penetrates through the side wall of the catheter body at the tail of the catheter body and is communicated with a membrane cavity opening, and a filling opening pipe is communicated with the extrusion membrane cavity; the inner cavity of the catheter body is divided into a circulation cavity and an extrusion film cavity by the film wall of the extrusion film cavity; an inner cavity of the catheter body can be fully filled after the extrusion film cavity expands; the video line is in signal connection with the display screen out of the tail end of the catheter body; the head end bending adjusting rod is matched with an inner cavity of the extrusion film cavity; according to the visual lower catheter, fluid is injected and sucked into the extrusion film cavity, so that the extrusion film cavity expands, shrinks and extrudes, the circulation cavity is dredged, and the visual lower catheter is simple in structure, high in practicability, low in cost and high in clinical value.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more particularly to unblockable medical catheters. Background Technology

[0002] The placement of drainage tubes in body cavities is extremely common in both surgical and medical treatments. In surgery, it's primarily for draining postoperative wound bleeding and exudate, while in internal medicine, it's mainly for draining cavity exudate. Obstructed drainage is extremely detrimental to recovery, potentially leading to misdiagnosis of postoperative hemorrhage as normal drainage, delaying crucial treatment, threatening the patient's life, and causing increased pressure in the drainage cavity, resulting in a critical condition. In such cases, the drainage tube may need to be removed and reinserted, increasing patient suffering. The same applies to other body cavity tubes, such as nasogastric tubes. Once a medical tube becomes blocked and cannot be cleared, not only can the original treatment plan be discontinued, increasing risks, but removing and reinserting the tube also increases patient suffering.

[0003] Currently, there are no effective methods for clearing medical catheters in clinical practice. The main methods for clearing them are:

[0004] Compression method: Use your hand to squeeze the catheter from proximal to distal. If you cannot squeeze the lumen of the catheter, the effect will be poor, and it may also cause catheter damage or rupture.

[0005] Flushing method: Open the distal opening of the catheter outside the body and flush with clean water. The water pressure exerts force on the blockage. When the blockage inside the tube is long, the water pressure is applied to only one end of the blockage inside the tube, resulting in a small force area and poor effect. Flushing water backward from the distal end into the tube may lead to retrograde infection.

[0006] Rotation method: Rotate the external part of the catheter left and right to loosen the adhesion between the blockage and the inner wall of the catheter. This method can only target the external part of the catheter and is very ineffective.

[0007] Suction method: Using negative pressure to attract the tube body. When the blockage inside the tube is long, the force area is only the end of the blockage in the tube cavity. The force area is small and the effect is poor.

[0008] To improve drainage safety, there is an urgent clinical need for a medical catheter that can be effectively cleared at any time to ensure catheter patency and the effectiveness of medical catheterization treatment. Summary of the Invention

[0009] To address the aforementioned deficiencies in the prior art, the present invention provides a medical catheter that can be unblocked, comprising a catheter body, wherein a suitable squeeze membrane cavity is provided along the long axis of the catheter body lumen; the head end of the squeeze membrane cavity is a blind end and is provided at the head end of the catheter body; an injection port tube is provided at the tail side of the catheter body connecting the squeeze membrane cavity; the membrane wall of the squeeze membrane cavity isolates the inner lumen of the catheter body into a flow cavity and a squeeze membrane cavity.

[0010] A suitable amount of fluid is injected into the squeezing membrane cavity, and the fixed thick wall of the membrane cavity expands to fully fill the corresponding inner cavity of the catheter body; the fluid is fully drained from the squeezing membrane cavity, and the membrane wall of the squeezing membrane cavity collapses and is contained within the inner cavity of the catheter body.

[0011] Furthermore, the extrusion membrane cavity includes a cylindrical membrane disposed within the cavity of the catheter body, the cross-sectional circumference of the cylindrical membrane being adapted to the cross-sectional circumference of the inner cavity of the catheter body; the head end of the cylindrical membrane is closed and bonded to the head end of the catheter body, and a membrane cavity opening is provided through the tail side wall of the catheter body, the tail end opening of the cylindrical membrane and the membrane cavity opening are annularly sealed and bonded; an infusion port tube is provided connecting the membrane cavity opening.

[0012] The membrane opening is round and matches the size of the inner cavity of the catheter body. The filling port tube is temporarily fixed and sealed to the membrane opening.

[0013] The extrusion membrane cavity and the catheter body are integrally formed by extrusion or injection molding; one side wall of the extrusion membrane cavity is the side wall of the catheter body, forming a fixed thick wall for the membrane cavity; the other side wall of the extrusion membrane cavity is a long strip-shaped common deformable membrane wall, and the two long sides of the common deformable membrane wall and the fixed thick wall of the membrane cavity are integrally formed by extrusion or injection molding; the sum of the cross-sectional widths of the common deformable membrane wall and the fixed thick wall of the membrane cavity is adapted to the perimeter of the cross-sectional area of ​​the inner cavity of the catheter body, and the fixed thick wall of the extrusion membrane cavity and the common deformable membrane wall are bonded and closed at both ends.

[0014] The membrane cavity is fixed with a thick wall and an injection chamber is provided along its long axis. The head end of the injection chamber is closed, and the head side of the injection chamber passes through the inner side of the membrane cavity and communicates with the extrusion membrane cavity. The injection chamber passes through the outer side of the tail end of the membrane cavity and communicates with the injection port tube.

[0015] Alternatively, a membrane cavity opening can be fixed with a thick wall through the membrane cavity, and an injection port tube can be installed connecting the membrane cavity opening.

[0016] Alternatively, a filling chamber is provided along the long axis inside the fixed thick wall of the membrane cavity; the head end of the filling chamber is closed, and the side of the filling chamber head penetrates the inner side of the fixed thick wall of the membrane cavity and communicates with the extrusion membrane cavity; the filling chamber penetrates the outer side of the tail end of the fixed thick wall of the membrane cavity and communicates with the filling port tube; isolated from the filling chamber, a round opening of the membrane cavity is provided through the fixed thick wall of the membrane cavity, the size of the membrane cavity opening and the inner cavity of the catheter body are adapted, and a matching sealing body is provided.

[0017] The filling port tube is equipped with a gas filling and deflation device, including a syringe, an elastic bladder, or an air pump.

[0018] The inflation / deflation device is configured as an air pump, including an inflation pump and an air extraction pump, and is electrically connected to a controller to control the inflation pump and the air extraction pump to work alternately at intervals.

[0019] A suitable puncture core is provided inside the flow cavity, and a puncture handle is provided at the tail opening of the puncture core exiting the flow cavity. A limiting body is provided on the head side of the puncture handle.

[0020] A camera is embedded in the side wall of the compression membrane cavity at the head end of the catheter body. The camera video cable is embedded along the long axis of the catheter body on the side wall of the catheter body corresponding to the compression membrane cavity. The camera video cable passes through the tail end of the catheter body and is connected to a display screen.

[0021] A membrane port is provided through the caudal wall of the catheter body and adapted to the inner lumen of the catheter body;

[0022] A head-end bending adjustment rod is provided; the head side of the head-end bending adjustment rod is an adjustment rod that is adapted to the extrusion membrane cavity; the tail side of the head-end bending adjustment rod is an adjustment handle that controls the adjustment handle to change the bending degree of the head section of the adjustment rod.

[0023] The catheter body has a radiopaque line embedded along the long axis of the catheter body on the side wall away from the squeezing membrane cavity; the head section of the catheter body has a drainage slit with a length of 30-200mm through it along the long axis on the side wall away from the squeezing membrane cavity.

[0024] The beneficial effects of this invention are:

[0025] 1. By filling the compression membrane cavity set inside the catheter body with suction fluid, the blockage block inside the catheter body cavity is broken up and cleaned, and the inner cavity and opening of the catheter body are unblocked;

[0026] 2. By setting up the filling chamber, when fluid is injected into the extrusion membrane chamber, the expansion of the extrusion membrane chamber creates a unidirectional extrusion of the inner cavity of the catheter body from the head end to the tail end, which is beneficial for expelling the blockage fragments from the outer cavity of the catheter body.

[0027] 3. When clearing the lumen and opening of the catheter body, it is not necessary to open the opening connecting the tail end of the catheter body to the body to avoid cross-infection;

[0028] 4. The squeezing membrane cavity is located on one side of the catheter body wall, so as not to interfere with the other side wall to automatically shear and add a new drainage inlet;

[0029] 5. Regularly clean the inner cavity of the catheter body using the inflation / deflation device to ensure unobstructed flow;

[0030] 6. Visualize the catheter placement and monitor the condition of the drainage cavity through camera settings;

[0031] 7. By setting a membrane port that matches the inner cavity of the catheter body, and with the head bending adjustment rod, the bending degree of the head section of the catheter body can be adjusted by inserting it into the squeezing membrane cavity, thereby adjusting the viewing angle of the camera.

[0032] 8. Insert the tip bending adjustment rod through the membrane cavity opening to compress and isolate the membrane cavity from the inner cavity of the catheter body, thus avoiding contamination of the body cavity by the inserted tip bending adjustment rod and preventing infection;

[0033] 9. It has a simple structure, low cost, and is easy to promote. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of two states of the extruded membrane cavity according to the first embodiment of the present invention;

[0035] Figure 2 This is a schematic diagram of two states of the extrusion membrane cavity according to the second embodiment of the present invention;

[0036] Figure 3 This is a schematic diagram of two states of the extrusion membrane cavity according to the third embodiment of the present invention;

[0037] Figure 4 This is a schematic diagram of two states of the extrusion membrane cavity according to the fourth embodiment of the present invention;

[0038] Figure 5 This is a schematic diagram of the air pump of the present invention;

[0039] Figure 6 This is a schematic diagram of the head-end bending adjustment rod of the present invention;

[0040] In the picture,

[0041] 1. Flow chamber; 11. Imaging line; 12. Drainage opening; 2. Extrusion membrane cavity; 21. Filling port tube; 22. Tubular membrane; 23. Membrane cavity opening; 24. Membrane cavity fixed thick wall; 25. Shared deformable membrane wall; 26. Filling cavity; 3. Head end bending adjustment rod; 31. Adjustment rod; 32. Adjustment handle. Detailed Implementation

[0042] To enable those skilled in the art to better understand the technical solutions of the present invention and to make the above-mentioned features, objectives, and advantages of the present invention clearer and easier to understand, the present invention will be further described below with reference to embodiments. These embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0043] like Figure 1-4 As shown, the unblockable medical catheter of the present invention includes a catheter body, and a matching squeeze membrane cavity 2 is provided along the long axis of the catheter body cavity; the head end of the squeeze membrane cavity 2 is a blind end and is provided at the head end of the catheter body; an injection port tube 21 is provided at the tail side of the catheter body in connection with the squeeze membrane cavity 2; the membrane wall of the squeeze membrane cavity 2 isolates the inner cavity of the catheter body into a flow cavity 1 and a squeeze membrane cavity 2.

[0044] A suitable amount of fluid is injected into the squeezing membrane cavity 2, and the membrane wall of the squeezing membrane cavity 2 expands to fully fill the corresponding inner cavity of the catheter body; the fluid is fully drained from the squeezing membrane cavity 2, and the membrane wall of the squeezing membrane cavity 2 collapses and is contained within the inner cavity of the catheter body.

[0045] Figure 1-4These are four different embodiments of the present invention. The top image of each figure shows the treatment after the fluid in the squeeze membrane cavity 2 has been completely drained, and the bottom image shows the treatment after the squeeze membrane cavity 2 has been filled with an appropriate amount of fluid. This will not be repeated below. The catheter body is a common medical catheter, a hollow tube, with specific dimensions determined according to clinical needs, including drainage tubes for internal and surgical use, nasogastric tubes, gastric tubes, urinary catheters, etc. The hollow lumen is used for fluid inflow or outflow and must be kept unobstructed. However, during fluid flow, solid lumps (mostly blood coagulation or blood clots entering the lumen, or possibly sediment from other fluids) often block the lumen. These solid lumps are soft and easily break under pressure. Externally, lumps inside the catheter body lumen are easily broken and removed by external force. However, the portion of the catheter body inside the body is difficult to break and remove because direct force cannot be applied, regardless of whether negative pressure suction or positive pressure flushing is used. The main reason is that the blockage inside the catheter body is similar in shape to the lumen, and is stuck in the lumen in the form of a long column. The friction force is distributed throughout the entire outer surface of the long column blockage, while the negative pressure suction or positive pressure flushing force only acts on one end of the long column blockage. The force-bearing surface is extremely small, making it difficult to shake the long column blockage stuck in the lumen.

[0046] This invention includes a catheter body and a fitted compression membrane cavity 2 disposed along the long axis within the catheter body cavity (fitting means that after the compression membrane cavity 2 is filled with an appropriate amount of gas, the membrane wall basically fills the inner cavity of the catheter body). The compression membrane cavity 2 can have its entire cavity wall made of a flexible membrane, or only a portion of its cavity wall made of a flexible membrane. The thickness of the flexible membrane should be controlled to be 10-50 mils for optimal results, ensuring both deformability and a certain degree of toughness to prevent accidental breakage, while also maintaining a minimal cross-section to reduce the occupancy of the flow section within the inner cavity of the catheter body. The head end of the compression membrane cavity 2 is a blind end, fixedly disposed at the head end of the catheter body; the tail end of the compression membrane cavity 2 is closed, and a filling port tube 21 is disposed on the tail side wall of the catheter body connecting to the compression membrane cavity 2. The membrane wall of the compression membrane cavity 2 divides the inner cavity of the catheter body into a flow cavity 1 and a compression membrane cavity 2. The compression membrane cavity 2 is approximately the same length as the catheter body, and after the membrane wall of the compression membrane cavity 2 expands, it can basically fill the inner cavity of the catheter body, causing the flow cavity 1 to be compressed and collapsed. During normal use, the compression membrane cavity 2 contained within the lumen of the catheter body is in a completely collapsed state. The membrane wall of the compression membrane cavity 2 is fully extended along the long axis of the catheter body without obvious bending or folding. Ideally, the cross-section of the compression membrane cavity 2 after collapsing should account for 2%-10% of the cross-section of the inner lumen of the catheter body.

[0047] When blockage occurs in the inner cavity of the catheter body, a suitable amount of fluid is first injected into the compression membrane cavity 2 through the filling port tube 21. The fluid pressure in the compression membrane cavity 2 increases, the cavity wall expands, and the volume of the compression membrane cavity 2 increases, eventually fully filling the entire inner cavity of the corresponding catheter body. The membrane wall of the compression membrane cavity 2 compresses the side wall of the flow cavity 1 inside the catheter body, exerting pressure on the elongated columnar blockage in the flow cavity 1 of the catheter body from the side, causing the blockage to break under positive pressure. Then, the fluid in the compression membrane cavity 2 is fully drained through the filling port tube 21. The fluid in the compression membrane cavity 2 decreases, the pressure drops, and the compression membrane cavity breaks up. The walls of the compression chamber 2 contract, reducing its volume. Eventually, the walls of the compression chamber 2 collapse, reducing its volume to its limit. This increases the volume of the flow chamber 1 within the catheter body, creating a brief negative pressure. This negative pressure, acting laterally, breaks down the blockage within the flow chamber 1. Repeated, alternating rapid filling and suction operations are performed through the filling port 21, subjecting the blockage within the flow chamber 1 to alternating positive and negative forces, ultimately breaking it into fragments. These fragments are then drawn out by the negative pressure connected to the tail end of the flow chamber 1. Once the flow chamber 1 is cleared, the fluid in the compression chamber 2 is drained through the filling port 21, maintaining the compression chamber 2 in a fully collapsed state. The flow chamber 1 then returns to its maximum size and is ready for continued use.

[0048] It should be noted that the catheter body and the membrane wall of the squeezing membrane cavity 2 of this invention are preferably made of the same flexible medical material, such as silicone or PVC. Before use, the volume of the inner cavity of the catheter body corresponding to the squeezing membrane cavity 2 should be fully understood. When filling the squeezing membrane cavity 2 with fluid to clear the inner cavity of the catheter body, the volume of the fluid should be consistent with the volume of the inner cavity of the catheter body, and its inner cavity volume is V=πr. 2 l (where r is the radius of the cross-section of the catheter body's inner cavity; l is the length of the catheter body; π is pi). If liquid is filled, the liquid volume should not exceed the volume of the inner cavity of the catheter body corresponding to the compression membrane cavity 2. If gas is filled, considering the compressibility of gas, the gas volume can be slightly larger than the volume of the inner cavity of the catheter body corresponding to the compression membrane cavity 2, but should not be excessive to avoid the membrane wall of the compression membrane cavity 2 from expanding and rupturing. Specific products should be precisely tested, and the maximum capacity for filling with gas or liquid should be indicated in the product instruction manual.

[0049] Furthermore, such as Figure 1As shown, the squeeze membrane cavity 2 includes a cylindrical membrane 22 disposed within the catheter body cavity. The cylindrical membrane 22 divides the catheter body cavity into a flow cavity 1 and a squeeze membrane cavity 2, which are distributed internally and externally. The catheter body cavity is essentially the flow cavity 1, and the squeeze membrane cavity 2 is located within the flow cavity 1. The cross-sectional perimeter of the cylindrical membrane 22 is adapted to the cross-sectional perimeter of the catheter body cavity. The head end of the cylindrical membrane 22 is closed and bonded to the head end of the catheter body. A membrane cavity opening 23 is provided through the tail wall of the catheter body. The tail end opening of the cylindrical membrane 22 and the membrane cavity opening 23 are annularly sealed and bonded. An inlet tube 21 is provided connecting the membrane cavity opening 23. Similarly, the length and thickness of the cylindrical membrane 22 should be adapted to the catheter body cavity (i.e., the flow cavity 1). The cylindrical membrane 22 should be made of a thin, flexible material, with a wall thickness of 10-50 mils being optimal. When the cylindrical membrane 22 is bonded and fixed within the catheter body cavity, it should be stretched out, and there should be no bending or folding along its long axis. Its working principle is the same as the above principle. In the drainage state, the fluid inside the cylindrical membrane 22 should be aspirated and emptied to keep it in a collapsed state, which will not be elaborated here.

[0050] Furthermore, such as Figure 1 As shown, the membrane opening 23 is round and fits the size of the catheter body's internal cavity. The filling port 21 is temporarily fixed and sealed to the membrane opening 23. Its purpose is:

[0051] Under normal circumstances, the filling port tube 21 is sealed and connected to the membrane cavity 23. The above method can be used to alternately fill and drain fluid into the tubular membrane 22 to clear the internal flow cavity 1 of the conduit body.

[0052] 2. The membrane opening 23 is a round opening that matches the size of the catheter body's inner cavity. The tubular membrane 22 forms a blind cavity with its head at the catheter body and its opening at the tail side of the catheter body. The inner cavity of the tubular membrane 22 is isolated from the flow cavity 1, and operations within the blind cavity of the tubular membrane 22 will not cause contamination of the inner cavity of the flow cavity 1. When it is necessary to clear long, columnar blockages that are difficult to break up in the flow cavity 1, the filling port tube 21 temporarily fixed to the outside of the membrane opening 23 can be opened. The membrane opening 23 is located outside the body, and a rod with a certain degree of hardness can be inserted through the membrane opening 23. Under the isolation of the membrane wall of the tubular membrane 22, the blockage in the flow cavity 1 of the catheter body can be directly stirred and broken up to achieve the purpose of clearing the blockage. 3. When necessary, a visual rod can be inserted through the membrane opening 23 to directly observe the shape and position of the blockage in the flow cavity 1 through the transparent membrane wall of the tubular membrane 22 to assist in the diagnosis of the condition.

[0053] Furthermore, such as Figure 2As shown, the extrusion membrane cavity 2 and the catheter body are integrally formed by extrusion or injection molding; one side wall of the extrusion membrane cavity 2 is the side wall of the catheter body, forming a membrane cavity fixing thick wall 24; the other side wall of the extrusion membrane cavity 2 is a long strip-shaped common deformable membrane wall 25, and the two long sides of the common deformable membrane wall 25 and the membrane cavity fixing thick wall 24 are integrally formed by extrusion or injection molding; the common deformable membrane wall 25 isolates the extension axis of the catheter body into the flow cavity 1 and the extrusion membrane cavity 2. The sum of the cross-sectional widths of the common deformable membrane wall 25 and the membrane cavity fixing thick wall 24 is adapted to the perimeter of the cross-sectional area of ​​the inner cavity of the catheter body, and the two ends of the membrane cavity fixing thick wall 24 and the common deformable membrane wall 25 are respectively bonded and closed. This is an optimal structure. The catheter body is extruded into a single-tube, double-lumen structure. One lumen is the flow chamber 1, which is the actual fluid channel used by the catheter body, such as for drainage or injection of nutrient solution. The other lumen is the extrusion membrane lumen 2 described in this invention, used to fill and aspirate fluid to clear the flow chamber 1 of the catheter body. In the middle of the catheter body, the adjacent walls of the flow chamber 1 and the extrusion membrane lumen 2 are shared, forming a relatively thin shared deformable membrane wall 25, with a thickness of 10-50 mils being optimal. The catheter body wall is divided into two parts by the shared deformable membrane wall 25. A thicker, less deformable part, with a thickness of 1-2 mm being optimal, forms the lumens of the flow chamber 1 and the extrusion membrane lumen 2, respectively, together with the shared deformable membrane wall 25. The shared deformable membrane wall 25 plays a role in expanding and squeezing, contracting and pulling, and repeatedly tapping the blockage in the flow chamber 1 when clearing it. The catheter body wall forming one side of the compression membrane cavity 2 is a membrane cavity fixing thick wall 24, which supports the shape of the catheter body and fixes the common deformable membrane wall 25, keeping the common deformable membrane wall 25 straight and relaxed within the catheter body.

[0054] The fixed thick wall 24 and the shared deformable membrane wall 25 are sealed at both ends of the catheter body, forming a blind-tube-shaped compression membrane cavity 2. Fluid is injected into or pumped out of the compression membrane cavity 2 through the filling port 21, causing the shared deformable membrane wall 25 to beat and pull out the blockage in the flow cavity 1, thereby clearing the inner cavity of the flow cavity 1. In the working state, the fluid in the compression membrane cavity 2 should be evacuated and kept in a collapsed state, so that the shared deformable membrane wall 25 is tightly attached to the fixed thick wall 24, keeping the flow cavity 1 unobstructed and ensuring the drainage effect. In specific implementation, in the cross-section of the catheter body, the fixed thick wall 24 and the shared deformable membrane wall 25 should each occupy half of its circumference to make full use of the space inside the catheter body and completely avoid the shared deformable membrane wall 25 being too long, causing bending and folding, or being too short, causing the shared deformable membrane wall 25 to be damaged due to excessive force during expansion.

[0055] Furthermore, such as Figure 3As shown, a filling cavity 26 is provided along the long axis inside the membrane cavity fixing thick wall 24. The head end of the filling cavity 26 is closed, and the head side of the filling cavity 26 penetrates the inner side of the membrane cavity fixing thick wall 24 and communicates with the compression membrane cavity 2. The tail end of the filling cavity 26 penetrates the outer side of the membrane cavity fixing thick wall 24 and communicates with the filling port tube 21. The filling cavity 26 is embedded in the membrane cavity fixing thick wall 24. Except for the head end, which communicates with the compression membrane cavity 2, the other parts of the filling cavity 26 are isolated by the membrane cavity fixing thick wall 24 inside the filling cavity 26 and do not communicate with the compression membrane cavity 2. The filling cavity 26 at the head end of the catheter body is sealed to form a blind end, and the filling cavity 26 penetrates the outer side of the membrane cavity fixing thick wall 24 at the tail end of the catheter body to provide the filling port tube 21.

[0056] Fluid is injected into the squeezing membrane cavity 2 through the filling port tube 21. The fluid flows through the filling cavity 26 embedded in the membrane cavity fixing thick wall 24 to the head side of the membrane cavity fixing thick wall 24, and then folds back into the squeezing membrane cavity 2, increasing the expansion of the fluid in the squeezing membrane cavity 2. The shared deformable membrane wall 25 expands and deforms into the inner cavity of the catheter body, compressing the flow cavity 1, and finally adheres to the inner wall of the catheter body on one side of the flow cavity 1, thus crushing and breaking up the blockage in the flow cavity 1. Fluid is also drawn from the squeezing membrane cavity 2 through the filling port tube 21. The fluid in the squeezing membrane cavity 2 enters the filling cavity 26 through the connection between the filling cavity 26 on the head side of the membrane cavity fixing thick wall 24 and the squeezing membrane cavity 2, and is drawn out, reducing the collapse of the fluid in the squeezing membrane cavity 2. The shared deformable membrane wall 25 adheres to the membrane cavity fixing thick wall 24, and finally adheres to the membrane cavity fixing thick wall 24, thus pulling and breaking up the blockage in the flow cavity 1. Its significance is:

[0057] The fluid inlet of the squeezing membrane cavity 2 is located at the head side of the catheter body. When the squeezing membrane cavity 2 expands, it forms a sequential squeezing effect from the head side to the tail side of the flow cavity 1. This pushes the blockage in the flow cavity 1 toward the opening located outside the body, which is conducive to the discharge of blockage fragments, reduces the retrograde entry of blockage fragments into the depth of the catheter body, and reduces the possibility of re-blockage.

[0058] The fluid outlet of the squeezing membrane cavity 2 is also on the head side of the conduit body. When the squeezing membrane cavity 2 collapses, it forms a sequential pulling from the head side to the tail side of the flow cavity 1. Because the tail of the flow cavity 1 is equipped with a one-way valve pointing outward, it has the effect of drawing the blockage at the opening of the flow cavity 1 into the lumen. This is beneficial for breaking up the blockage outside the opening of the flow cavity 1 and sucking it into the flow cavity 1. It also has a vibration and destruction effect on the blockage outside the opening of the flow cavity 1, so that the opening of the flow cavity 1 can be restored to unobstructed flow.

[0059] Or, such as Figure 2 As shown, a membrane port 23 is provided through the thick wall 24 of the membrane cavity. The membrane port 23 should be adapted to the size of the inner cavity of the catheter body. An infusion port 21 is provided connecting to the membrane port 23. The function of the membrane port 23 is... Figure 1 The solutions are similar, so I will not go into details.

[0060] Or, refer to Figure 4 As shown, a filling chamber 26 is provided along the long axis inside the membrane cavity fixing thick wall 24; the head end of the filling chamber 26 is closed, and the head side of the filling chamber 26 penetrates the inner side of the membrane cavity fixing thick wall 24 and communicates with the extrusion membrane cavity 2; the tail end of the filling chamber 26 penetrates the outer side of the membrane cavity fixing thick wall 24 and communicates with the filling port tube 21; isolated from the filling chamber 26, a round membrane cavity port 23 is provided through the membrane cavity fixing thick wall 24, the size of the membrane cavity port 23 and the inner cavity of the catheter body are adapted, and a matching sealing body is provided. This is Figure 3 The design incorporates a membrane cavity opening 23 and a matching sealing body. It not only has... Figure 3 The advantages of filling cavity 26 in the scheme are also retained. Figure 1 The advantages of membrane port 23 in the scheme will not be elaborated here.

[0061] Furthermore, the filling port tube 21 is equipped with a gas filling and degassing device, including a syringe, an elastic bladder, or an air pump. The gas filling and degassing device makes it more convenient to perform filling and aspiration operations on the extrusion membrane cavity 2 through the filling port tube 21, and facilitates the unblocking of the flow cavity 1 at any time.

[0062] Furthermore, such as Figure 5 As shown, the inflation / deflation device is configured as an air pump, including an inflation pump and a deflation pump, and is electrically connected to a controller to control the alternating operation of the inflation pump and the deflation pump. Maintaining the patency of the flow cavity 1 is crucial, especially after major surgeries. It is essential to keep the drainage unobstructed and not wait until the flow cavity 1 is completely blocked before attempting to clear it. At the onset of drainage after such surgeries (e.g., heart, lung, esophageal, liver transplants), the flow cavity 1 can be periodically cleared and managed. The controller controls the alternating operation of the inflation pump and the deflation pump to maintain the patency of the flow cavity 1 at all times. Specifically, during drainage, the deflation pump continuously operates to keep the membrane cavity 2 in a collapsed state, preventing the flow cavity 1 from being compressed and occupied, thus entering the drainage state. After 60 minutes, the inflation pump and the deflation pump begin alternating operation at 30-60 times / min for maintenance. After 5 minutes, the flow cavity 1 returns to the drainage state for another 60 minutes, and this cycle repeats continuously to completely prevent blockage of the flow cavity 1 and maintain its patency at all times.

[0063] Furthermore, a suitable puncture core is provided within the flow cavity 1, and a puncture handle is provided at the tail opening of the puncture core exiting the flow cavity 1. A limiting body is provided on the head side of the puncture handle. The puncture core design makes puncture and drainage of patients with pneumothorax, pleural effusion, and ascites extremely convenient, avoiding excessive damage from incisions for catheter placement, and preventing leakage of fluid and air from the incision. It has already been used in clinical practice and will not be elaborated further.

[0064] Furthermore, a camera is embedded in the side wall of the compression lumen 2 at the tip of the catheter body. The camera's video cable is embedded along the long axis of the catheter body on the side wall corresponding to the compression lumen 2. The video cable extends through the tail side of the catheter body and connects to a display screen. The camera, video cable, and display screen make drainage visible, facilitating observation of the condition at the drainage site and significant changes in the position of the catheter tip, allowing for repositioning and improving drainage treatment efficacy. Of course, a flushing port should be provided at the camera location to inject sterile saline solution to maintain clear visibility of the camera in case of contamination. This is a common clinical technique and will not be elaborated further.

[0065] The camera and video cable are embedded in the side wall of the compression membrane cavity 2 of the conduit body. The purpose of this is that the flow cavity 1 often requires cutting holes in the tube wall at different locations to increase the opening. Obviously, cutting holes should not damage the video cable and the compression membrane cavity 2. Since the video cable and the compression membrane cavity 2 are located on the same side wall of the conduit body, the other side wall has no special structure and is only the side wall of the flow cavity 1. Cutting holes in this location can avoid damage to the video cable and the compression membrane cavity 2.

[0066] Furthermore, such as Figure 1 , 2 As shown in Figure 4, the membrane port 23, which is set through the caudal wall of the catheter body and adapted to the inner lumen of the catheter body, has already been described in terms of its clinical significance and will not be repeated here.

[0067] like Figure 6 As shown, the present invention also includes a tip bending adjustment rod 3; the tip of the tip bending adjustment rod 3 is an adjustment rod 31, the length of which is adapted to the length and inner cavity of the compression membrane cavity 2; the tail of the tip bending adjustment rod 3 is an adjustment handle 32, which controls the adjustment handle 32 to change the curvature of the tip of the adjustment rod 31. This structure should be designed in conjunction with the camera and the membrane cavity opening 23. Its purpose is that when it is necessary to adjust the viewing angle of the camera at the tip of the catheter body, the sealing body or filling tube 21 on the round membrane cavity opening 23 is removed, and the adjustment rod 31 of the tip bending adjustment rod 3 is inserted into the compression membrane cavity 2 through the membrane cavity opening 23 until the tip of the adjustment rod 31 reaches the tip of the compression membrane cavity 2. At this time, the curvature of the tip of the adjustment rod 31 can be adjusted by holding the control adjustment handle 32, thereby adjusting the curvature of the tip of the catheter body and adjusting the viewing angle of the camera. Correspondingly, the adjustment rod 31 should be adapted to the size of the inner cavity of the compression membrane cavity 2 and have a certain supporting force. The tip bending adjustment rod 3 is a common structure in medical endoscopes and will not be described in detail.

[0068] Furthermore, such as Figure 4As shown, a radiopaque line 11 is embedded along the long axis of the catheter body on the side wall away from the squeeze membrane cavity 2. A drainage slit 12, 30-200 mm long, is provided through the long axis of the catheter body head on the side wall away from the squeeze membrane cavity 2. The radiopaque line 11 facilitates X-ray imaging to locate the catheter body's insertion position within the body when necessary. The radiopaque line 11 is located on the side wall of the catheter body away from the squeeze membrane cavity 2. When a cutting hole is added to the drainage cavity 1, the cutting hole can just cut the radiopaque line 11, forming a defect on the radiopaque line 11. During X-ray imaging, the location of the cutting hole can be determined by the radiopaque line at the defect position on the X-ray film. The drainage slit 12, 30-200 mm long, through the long axis of the catheter body head on the side wall away from the squeeze membrane cavity 2, increases the drainage inlet area at the head of the drainage cavity 1, allowing for smoother gas or fluid drainage. These structures are of great significance for postoperative drainage in the thoracic and abdominal cavities.

[0069] The above embodiments are merely illustrative of the principles and effects of this patent application and are not intended to limit this patent application. Any person skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of this patent application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this patent application shall still be covered by the claims of this patent application.

Claims

1. Can unblock medical catheters, characterized in that: The catheter body includes a fitting squeeze membrane cavity (2) arranged along the long axis inside the catheter body. The head end of the squeeze membrane cavity (2) is a blind end and is located at the head end of the catheter body. A filling port tube (21) is arranged at the tail side of the catheter body to connect the squeeze membrane cavity (2). The membrane wall of the squeeze membrane cavity (2) isolates the inner cavity of the catheter body into a flow cavity (1) and a squeeze membrane cavity (2). A suitable amount of fluid is injected into the squeezing membrane cavity (2), and the membrane wall of the squeezing membrane cavity (2) expands to fully fill the corresponding inner cavity of the catheter body; the fluid is fully pumped out of the squeezing membrane cavity (2), and the membrane wall of the squeezing membrane cavity (2) collapses and is contained within the inner cavity of the catheter body.

2. The unblockable medical catheter according to claim 1, characterized in that: The compression membrane cavity (2) includes a tubular membrane (22) disposed in the cavity of the catheter body. The cross-sectional circumference of the tubular membrane (22) is adapted to the cross-sectional circumference of the cavity of the catheter body. The head end of the tubular membrane (22) is closed and bonded to the head end of the catheter body. A membrane cavity opening (23) is provided through the tail side wall of the catheter body. The tail end opening of the tubular membrane (22) and the membrane cavity opening (23) are sealed and bonded in an annular shape. An injection port tube (21) is provided connecting the membrane cavity opening (23).

3. The unblockable medical catheter according to claim 2, characterized in that: The membrane opening (23) is round and is adapted to the size of the inner cavity of the catheter body. The filling tube (21) is temporarily fixed in a sealed connection with the membrane opening (23).

4. The unblockable medical catheter according to claim 1, characterized in that: The extrusion membrane cavity (2) and the catheter body are integrally formed by extrusion or injection molding; one side wall of the extrusion membrane cavity (2) is the side wall of the catheter body, forming a membrane cavity fixing thick wall (24); the other side wall of the extrusion membrane cavity (2) is a long strip-shaped common deformable membrane wall (25), and the two long sides of the common deformable membrane wall (25) and the membrane cavity fixing thick wall (24) are integrally formed by extrusion or injection molding; the sum of the cross-sectional widths of the common deformable membrane wall (25) and the membrane cavity fixing thick wall (24) is adapted to the perimeter of the cross-sectional area of ​​the inner cavity of the catheter body, and the head and tail ends of the membrane cavity fixing thick wall (24) and the common deformable membrane wall (25) are respectively bonded and closed.

5. The unblockable medical catheter according to claim 4, characterized in that: A filling chamber (26) is provided along the long axis inside the membrane cavity fixing thick wall (24); the head end of the filling chamber (26) is closed, the head side of the filling chamber (26) passes through the inner side of the membrane cavity fixing thick wall (24) and communicates with the extrusion membrane cavity (2), and the filling chamber (26) passes through the outer side of the tail end of the membrane cavity fixing thick wall (24) and communicates with the filling port tube (21); Alternatively, a membrane cavity opening (23) is provided through a fixed thick wall (24) of the membrane cavity, and an injection port tube (21) is provided connecting the membrane cavity opening (23). Alternatively, a filling chamber (26) is provided along the long axis inside the membrane cavity fixed thick wall (24); the head end of the filling chamber (26) is closed, the head side of the filling chamber (26) passes through the inner side of the membrane cavity fixed thick wall (24) and communicates with the squeezing membrane cavity (2), and the filling chamber (26) passes through the outer side of the tail end of the membrane cavity fixed thick wall (24) and communicates with the filling port tube (21); isolated from the filling chamber (26), a round membrane cavity port (23) is provided through the membrane cavity fixed thick wall (24), the size of the membrane cavity port (23) and the inner cavity of the catheter body are matched, and a matching sealing body is provided.

6. The unblockable medical catheter according to claim 1, characterized in that: The filling port tube (21) is equipped with a gas filling and degassing device, including a syringe, an elastic bladder or an air pump.

7. The unblockable medical catheter according to claim 6, characterized in that: The inflation / deflation device is configured as an air pump, including an inflation pump and an air extraction pump, and is electrically connected to a controller to control the inflation pump and the air extraction pump to work alternately at intervals.

8. The unblockable medical catheter according to claim 1, characterized in that: The flow chamber (1) is provided with a suitable puncture core, and a puncture handle is provided at the tail opening of the puncture core exiting the flow chamber (1). A limiting body is provided on the head side of the puncture handle.

9. The unblockable medical catheter according to claim 1, characterized in that: A camera is embedded in one side wall of the compression membrane cavity (2) at the head end of the catheter body. The camera video cable is embedded along the long axis of the catheter body in the side wall of the catheter body corresponding to the compression membrane cavity (2). The camera video cable passes through the tail side of the catheter body and connects to the display screen.

10. The unblockable medical catheter according to claim 3 or 5, characterized in that: A membrane port (23) is provided through the tail side wall of the catheter body and adapted to the inner cavity of the catheter body. And set a head end bending adjustment rod (3); the head end bending adjustment rod (3) is an adjustment rod (31) on the head side, and the adjustment rod (31) and the extrusion film cavity (2) are adapted; the tail end bending adjustment rod (3) is an adjustment handle (32), and the adjustment handle (32) is controlled to change the bending degree of the head section of the adjustment rod (31).

11. The unblockable medical catheter according to claim 1, characterized in that: The catheter body has a radiopaque line (11) embedded along the long axis of the catheter body on the side wall away from the squeezing membrane cavity (2); the head section of the catheter body has a drainage slit (12) with a length of 30-200mm through the long axis of the side wall away from the squeezing membrane cavity (2).

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