Double-balloon catheter for dynamically monitoring intra-abdominal pressure through bladder

Abstract

The utility model relates to a double-balloon catheter for dynamically monitoring intra-abdominal pressure through the bladder. The double-balloon catheter mainly comprises a catheter body 100, a pressure measuring balloon 200, an anchoring balloon 300 and an adapter 400. The pressure measuring balloon is arranged on the upstream of the anchoring balloon, the peripheries of the two balloons do not make contact with each other, and after the catheter is anchored in the bladder, the anchoring balloon does not transmit the pressure generated by external traction of the catheter body to the pressure measuring balloon, so that the pressure measuring balloon can accurately monitor the pressure transmitted to the inner wall of the bladder by the abdominal cavity; the dynamic intra-abdominal pressure is truly and effectively reflected, and the accuracy and credibility of dynamic monitoring of the intra-abdominal pressure are guaranteed.

Description

Technical Field

[0001] The invention relates to a double-balloon urinary catheter for dynamically monitoring intra-abdominal pressure through the bladder, which is used to continuously monitor the intra-abdominal pressure of patients with indwelling urinary catheters and is a disposable sterile medical device. Background Art

[0002] Intra-abdominal pressure (IAP) is the steady-state pressure within the enclosed abdominal cavity, primarily generated by the hydrostatic pressure of the abdominal viscera. In healthy adults, IAP ranges from 0 to 5 mmHg. When IAP persistently rises above 5 mmHg, it is considered IAP hypertension. IAP is common in critically ill patients and can cause organ and tissue hypoperfusion, even developing into abdominal compartment syndrome (ACS) and leading to multi-organ and system dysfunction. This directly increases mortality and poses significant challenges to treatment. Therefore, daily IAP measurement is a nursing technique clearly mandated in clinical guidelines for critically ill patients. Current IAP monitoring methods include transcystometry, transgastric manometry, transrectal manometry, and transinferior vena cava manometry. The World Society for the Diagnosis and Treatment of Intra-abdominal Hypertension and ACS (WSACS) recommends transcystometry as a guideline for IAP.

[0003] While transcystometry, which reflects intra-abdominal pressure, does not directly translate into bladder pressure, it must be performed under specific monitoring conditions. The technical approach involves injecting ≤25ml of 0.9% sodium chloride solution into the bladder when intra-abdominal pressure is required. The patient is then placed in a fully supine position (lying flat), and a pressure sensor is placed at the mid-axillary line and zeroed, ensuring that the patient's abdominal muscles are not contracted. The bladder pressure is then measured at the end of expiration, at which point the bladder pressure is equivalent to the intra-abdominal pressure. This measurement method has drawbacks: it is complex to operate, requires injecting ≤25ml of 0.9% sodium chloride solution into the bladder for each measurement, and only a single pressure value is obtained per measurement, making it impossible to continuously and dynamically monitor intra-abdominal pressure parameters. Rapid, dynamic, and continuous monitoring of bladder pressure to reflect stable and reliable intra-abdominal pressure is crucial for early detection and intervention, which is crucial for monitoring the vital signs of critically ill patients. Therefore, the present inventors have proposed a catheter technology solution for dynamic transcystometry of intra-abdominal pressure, filling the gap in the technology for transcystometry-based intra-abdominal pressure monitoring. Summary of the Invention

[0004] The present invention relates to a double-balloon urinary catheter for dynamic monitoring of intra-abdominal pressure through the bladder, which mainly comprises a urinary catheter body, a pressure measuring balloon, an anchoring balloon and a conversion joint.

[0005] The catheter body is a flexible tube with 3 to 5 lumens inside. According to the different functions realized by the lumens inside the catheter body, it is divided into three, four or five-lumen models. For example, the interior of the catheter body is divided into three lumens, wherein the first lumen is the drainage lumen, the second lumen is the pressure measuring lumen, and the third lumen is the anchoring balloon water injection / air lumen. In order to realize the temperature measurement function in the bladder simultaneously, it is necessary to add a temperature sensor to the head of the catheter body. Then, the interior of the catheter body can be divided into four lumens, wherein the first lumen is the drainage lumen, the second lumen is the pressure measuring lumen, the third lumen is the anchoring balloon water injection / air lumen, and the fourth lumen is the temperature measuring lumen. The temperature measuring lumen is used to set a body temperature sensor and a wire in the lumen. Furthermore, according to clinical needs, a flushing lumen can be added on the basis of the above technical solution. For example, a fifth lumen is added to a urinary catheter body with an outer diameter greater than 18 Fr. The fifth lumen is a flushing lumen, which is used to infuse drugs or flushing fluid into the bladder.

[0006] Catheter bodies are typically extruded from medical polymer materials such as medical latex, silicone rubber, polyurethane, or soft polyvinyl chloride. They are manufactured to varying outer diameters and lengths depending on the intended patient population. For example, outer diameters of catheter bodies range from 8Fr, 10Fr, 24Fr, and 26Fr, while lengths range from 250mm to 400mm.

[0007] The pressure measuring balloon is a non-compliant balloon made of a flexible film. The main physical property of a non-compliant balloon is that the outer wall has no stretchability or elasticity, or has only very little stretchability or elasticity. When liquid or gas is infused within the specified volume range, the outer wall of the pressure measuring balloon will not expand or contract, nor will it produce a contractile force on the liquid inside the pressure measuring balloon. The maximum diameter of the pressure measuring balloon is stable and will not change with changes in internal pressure or external pressure. The maximum diameter of the pressure measuring balloon refers to the outer diameter of the pressure measuring balloon when the maximum infusion volume is reached by infusing liquid or gas into the pressure measuring balloon within its defined volume range.

[0008] The pressure measuring balloon is available in various sizes, ranging from 5ml to 30ml, depending on the outer diameter of the catheter body it is compatible with. For example, the balloon is available in various sizes, including 5ml, 8ml, 10ml, 25ml, and 30ml.

[0009] The types of pressure-measuring balloons used include catheter-side balloons and catheter-tip balloons. A catheter-side balloon has catheter-connecting ports at both ends, which tightly connect to the catheter's outer periphery after the catheter is inserted into the balloon. A catheter-tip balloon has a single port, which is inserted into the catheter's tip and tightly connects to the outer periphery of the catheter's head.

[0010] The shape of the pressure measuring balloon is not limited, as long as the outer periphery of the balloon can have a large external contact surface with the bladder wall and can evenly transmit the pressure of the bladder wall. For example, the shape of the pressure measuring balloon can be circular, oval, heart-shaped, etc.

[0011] The pressure-measuring balloon is mounted on the catheter's head, its interior communicating with the catheter's second pressure-measuring chamber. The balloon's catheter connection is tightly coupled to the catheter's outer periphery, ensuring the balloon adheres tightly to the catheter's head during drainage.

[0012] In order to reduce the interference of the head of the catheter body against the inner wall of the bladder and the interference caused by the transmission of intra-abdominal pressure to the bladder, which affects the reliability and validity of dynamic intra-abdominal pressure monitoring. Preferably, the pressure measuring balloon adopts a catheter tip balloon, the pressure measuring balloon is arranged at the head end of the catheter body, the head end of the catheter body enters the inner cavity of the pressure measuring balloon, and the head end of the catheter body is completely enclosed inside the pressure measuring balloon. The second channel pressure measuring cavity of the catheter body is connected to the inner cavity of the pressure measuring balloon, and the catheter joint of the pressure measuring balloon is tightly combined with the outer periphery of the head end of the catheter body. For example, a circular catheter tip balloon is used. When the pressure measuring balloon is injected with liquid or gas, the pressure measuring balloon and the catheter body form a circular lollipop structure. The outer periphery of the pressure measuring balloon can fully contact the inner wall of the bladder, and truly reflect the pressure transmitted from the abdominal cavity to the bladder.

[0013] The anchoring balloon is a compliant balloon made of an elastic film material. Its effective volume is available in multiple sizes, ranging from 10ml to 30ml, depending on the outer diameter of the catheter body it is compatible with. When the anchoring balloon is infused with liquid or gas within the specified volume range, its outer wall expands and deforms to accommodate the surrounding resistance. The greater the amount of liquid or gas injected, the larger the balloon's peripheral volume, ensuring stable anchoring of the catheter at the base of the bladder.

[0014] The anchoring balloon is positioned at the outer periphery of the front end of the catheter body, downstream of the pressure measuring balloon, with a minimum spacing of 5 mm between them. The interior of the anchoring balloon communicates with the third lumen of the catheter body, providing water / air inlet. The front and rear catheter connections of the anchoring balloon are hermetically sealed to the outer periphery of the catheter body.

[0015] A urine diversion hole is provided on the urinary catheter body between the pressure measuring balloon and the anchoring balloon; the urine diversion hole is communicated with the first lumen drainage cavity of the urinary catheter body.

[0016] The tail of the catheter body is provided with a branch interface corresponding to the internal cavity, and the number, shape and purpose of the branch interface are matched to the internal cavity where it is located.

[0017] The tail end of the first channel drainage cavity is combined with the first branch interface, the first branch interface matches the interface of the drainage pipeline, and the first branch interface is connected to the urine collection bag through the drainage pipeline interface;

[0018] The tail end of the second channel pressure measuring cavity is combined with the second branch interface, which is used to inject liquid or air into the pressure measuring balloon and is connected to the pressure measuring port of the pressure sensor. In order to facilitate the perfusion or pressure measuring operation of medical staff, it is preferred that an adapter is further provided on the periphery of the second branch interface, and the adapter includes a three-way connector, a two-way connector, and a spring self-locking connector. The adapter is connected to the pressure measuring port of the pressure sensor using a pressure measuring extension pipeline. Obviously, the pressure measuring port of the pressure sensor can also be directly connected to the inner cavity of the adapter. For example, a micro pressure sensor can be used to place the pressure sensor into the inner cavity of the second branch interface or the adapter. The pressure sensor communicates with the monitoring equipment through a wire or a wireless communication module (Bluetooth, WiFi, etc.) to achieve dynamic monitoring of the intra-abdominal pressure.

[0019] The tail end of the third channel anchoring balloon water / air injection chamber is combined with the third branch interface, which is equipped with an infusion connector for injecting water / air into the anchoring balloon. The infusion connector adopts a heparin cap that can self-seal after infusion, a one-way valve, or a punctureable sealing plug.

[0020] In one embodiment, the double-balloon urinary catheter also features a temperature measurement function. Specifically, a temperature sensor is positioned at the front end of the fourth lumen of the catheter. The temperature sensor terminal is welded to a temperature measurement wire, which extends along the fourth lumen to the periphery of the fourth branch interface. A temperature measurement interface is provided at the end of the wire. The temperature measurement interface includes a DC connector, a USB port, and a 2P terminal block. The temperature sensor's temperature measurement interface is connected to the temperature input interface of the monitoring device.

[0021] Furthermore, in another embodiment, the catheter body is further provided with a flushing lumen, which is located in the fifth lumen. The front end of the fifth lumen is provided with a flushing hole, which is located on the outer wall of the catheter body near the anchoring balloon. The rear end of the fifth lumen is combined with the fifth branch interface. The outer periphery of the fifth branch interface is provided with a sealable interface for injecting flushing fluid or medication. For example, the sealable interface includes a heparin cap, a one-way valve, or a puncturable sealing plug.

[0022] The advantages of the present invention are as follows: a non-compliant pressure measuring balloon is provided at the head end of the catheter, and the inner cavity of the pressure measuring balloon is connected to the sensing port of the pressure sensor via the second cavity and the second branch interface. The outer wall of the pressure measuring balloon is not elastic. After the rated liquid or gas is injected into the interior of the pressure measuring balloon, the interior of the pressure measuring balloon will not bring interference pressure due to the expansion and contraction of its own outer wall. At the same time, the pressure measuring balloon is provided upstream of the anchoring balloon, and the peripheries of the two balloons do not contact each other. After the catheter is anchored in the bladder, the anchoring balloon will not transmit the pressure generated by the external traction of the catheter body to the pressure measuring balloon, so that the pressure measuring balloon can accurately monitor the pressure transmitted from the abdominal cavity to the inner wall of the bladder, truly and effectively reflect the dynamic intra-abdominal pressure, and ensure the accuracy and reliability of dynamic monitoring of intra-abdominal pressure. The present invention realizes dynamic monitoring of intra-abdominal pressure in patients with indwelling catheters in the correct body position, fills the gap in this technical field, is very simple to operate, solves the long-standing clinical problem of dynamic monitoring of intra-abdominal pressure, and is worthy of clinical promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of the basic type of the present invention

[0024] Figure 2 This is a structural diagram of an embodiment of a product with added temperature measurement and flushing functions according to the present invention.

[0025] Figure 3 This is a schematic cross-sectional view of the basic type of urinary catheter body of the present invention.

[0026] Figure 4 This is a cross-sectional diagram of the catheter body of the present invention that has both temperature measurement and flushing functions.

[0027] As shown in the figure: urinary catheter body 100, first lumen 101, second lumen 102, third lumen 103, fourth lumen 104, fifth lumen 105, pressure measuring balloon 200, anchoring balloon 300, conversion joint 400, first branch interface 401, second branch interface 402, third branch interface 403, fourth branch interface 404, fifth branch interface 405, urine diversion hole 500, temperature sensor 600, flushing hole 700, temperature measuring interface 800, temperature measuring wire 801 DETAILED DESCRIPTION

[0028] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0029] Example 1: Preparation of a product with a temperature measurement function according to the present invention

[0030] 1. Preparation of main materials

[0031] 1.1 Catheter body 100

[0032] like Figure 4The structure shown is designed and manufactured using an extrusion die for the catheter body 100, made of medical silicone rubber. The outer diameter of the catheter body 100 is 20 French (Fr). Five lumens are located within the catheter body 100: the first lumen 101 is a drainage lumen, the second lumen 102 is a pressure measurement lumen, the third lumen 103 is a water / air injection lumen for the anchoring balloon, the fourth lumen 104 is a temperature measurement lumen, and the fifth lumen 105 is an irrigation lumen.

[0033] The catheter body 100 is formed by extruding the tube using a conventional precision extrusion process, and then cut into sections of 300 mm in length for later use.

[0034] 1.2 Adapter 400

[0035] like Figure 4 The structure shown is designed and manufactured using an injection mold for the adapter 400, made of medical silicone rubber. The adapter 400 has five branch connectors that correspond to the internal cavities of the catheter body 100: a first branch connector 401, a second branch connector 402, a third branch connector 403, a fourth branch connector 404, and a fifth branch connector 405.

[0036] The conversion joint 400 is prepared by conventional precision injection molding technology and is ready for use.

[0037] 1.3 Manometric Balloon 200

[0038] like Figure 4 The structure shown is designed and manufactured for a pressure-measuring balloon 200, a catheter tip balloon. Made of thermoplastic polyurethane (TPU), it is manufactured using the same process used for non-compliant specialty balloons: tube extrusion, blow molding, pressure holding, and cooling and setting. Pressure-measuring balloon 200 is required to be used in conjunction with a catheter tip. After cooling and setting, it has a circular shape with a maximum diameter of 30 mm, a wall thickness of 0.1 mm, and a pressure resistance of no less than 100 kPa. This non-compliant specialty balloon, after cooling and setting, will not experience secondary expansion or deformation of its outer wall when the inner cavity is filled with liquid or gas. After passing inspection, it is ready for use.

[0039] 1.4 Anchoring Balloon 300

[0040] like Figure 4The structure shown is used to design and manufacture the anchoring balloon 300, which is made of medical silicone rubber and is produced using the traditional balloon tube extrusion, blow molding and cooling molding process. The anchoring balloon 300 is required to be a balloon for connecting to the periphery of the catheter, and both ends of the balloon are provided with interfaces for connecting to the periphery of the catheter body 100. The anchoring balloon 300 is nearly circular or elliptical, with a maximum volume of 30ml and a wall thickness of 0.15mm. The anchoring balloon 300 is a compliant balloon. When the balloon cavity is filled with liquid or gas, the outer wall of the anchoring balloon 300 can deform freely in accordance with the resistance of external objects and can be tightly anchored in the triangular area at the bottom of the bladder. After passing the inspection, it is ready for use.

[0041] 1.5 Temperature sensor 600

[0042] The temperature sensor 600 uses a thermistor temperature sensor, the length, width and height should not be greater than 3mm×0.6mm×0.6mm, the range should not be less than 25℃~45℃, the accuracy should not be less than 0.1℃, and the measurement error should not exceed ＋ 0.2℃.

[0043] 2. Preparation process path

[0044] 2.1 Use liquid silicone to seal the openings of the first lumen 101, the third lumen 103, the fourth lumen 104, and the fifth lumen 105 at the top of the catheter body 100, leaving only the top opening of the second lumen 102. After the glue is applied, the cross-section of the top of the catheter body 100 has an R angle or a rounded corner.

[0045] 2.2 Use medical glue to bond the pressure measuring balloon 200 to the top of the catheter body 100. The bonding part is located 10mm to 15mm downstream of the catheter body 100. The head of the catheter body 100 extends about 5mm into the inner cavity of the pressure measuring balloon 200. Check the sealing and firmness of the bonding part.

[0046] 2.3 Using a hole opener, an elliptical urine diversion hole 500 with a major semi-axis of 2 mm is opened on the outer wall of the catheter body 100 where the first lumen 101 is located. The urine diversion hole 500 is set 5 mm to 8 mm downstream of the bonding part of the pressure measuring balloon 200.

[0047] 2.4 Using a hole opener, an elliptical flushing hole 700 with a major semi-axis of 1 mm is opened on the outer wall of the catheter body 100 where the fifth lumen 105 is located. The flushing hole 700 is set 3 mm to 5 mm downstream of the urine diversion hole 500.

[0048] 2.5 Use a hole opener to open a water / air injection hole with a semi-long axis of 1mm on the outer wall of the catheter body 100 where the third lumen 103 is located for the anchoring balloon 300. The water / air injection hole is set 10mm to 15mm downstream of the flushing hole 700.

[0049] 2.6 Insert the anchoring balloon 300 onto the outer periphery of the catheter body 100, ensuring that the center of the anchoring balloon 300 is aligned with the outer periphery of the water / air injection hole. Use medical glue to tightly bond the ends of the anchoring balloon 300 to the outer periphery of the catheter body 100. Check the sealing and firmness of the bonding areas.

[0050] 2.7 Weld the two pins of the temperature sensor 600 to the temperature measuring wire 801 respectively, and use a guide wire to push the temperature sensor 600 into the fourth lumen 104 so that the temperature sensor 600 is retained 5 mm to 8 mm downstream of the anchoring balloon 300.

[0051] 2.8 Use medical glue to bond the adapter 400 to the tail of the catheter body 100 and make the catheter

[0052] The internal cavities of the main tube 100 are matched one by one with the branch interfaces of different functions on the conversion joint 400, and the sealing and firmness of the bonding areas are checked. The tail end of the first cavity is connected to the first branch interface 401, the tail end of the second cavity is connected to the second branch interface 402, the tail end of the third cavity is connected to the third branch interface 403, and the tail end of the fifth cavity is connected to the fifth branch interface 405. The temperature measurement wire 801 extending from the tail end of the fourth cavity passes through the fourth branch interface 404 and is connected to the temperature measurement interface 800.

[0053] 3. A three-way valve that can switch the passage is glued to the second branch interface 402. The first interface of the three-way valve is connected to the second cavity, the second interface is connected to the pressure measuring port of the pressure sensor of the monitoring equipment, and the third interface is used to connect to the syringe for infusing liquid / air into the pressure measuring balloon. The three passages can be freely switched through the switching handle of the valve body.

[0054] 4. A spring self-locking connector commonly used for urinary catheters is bonded to the third branch interface 403 .

[0055] 5. After passing the inspection, package and sterilize with ethylene oxide.

[0056] Example 2 Application of the present invention and monitoring equipment

[0057] 1. The qualified product prepared in Example 1 was placed into the human body through the patient's urethra.

[0058] 2. Inject 20 ml of sterile saline into the anchoring balloon 300 through the spring self-locking joint of the third branch interface 403, and gently pull the catheter body 100 to confirm that the anchoring balloon 300 has been anchored in the bladder trigone.

[0059] 3. After injecting 10 ml of sterile saline into the pressure measuring balloon 200 through the third port of the three-way valve on the second branch port 402, the three-way valve is switched to the closed state of the second branch port 402.

[0060] 4. Connect the temperature measurement interface 800 to the temperature measurement data interface of the monitoring device.

[0061] 5. Use an extended pipeline to connect the pressure sensor monitoring port of the monitoring equipment to the three-way valve on the second branch interface 402, switch the three-way valve so that the second branch interface 402 and the pressure sensor monitoring port are in a conducting state, and the third interface of the three-way valve is in a closed state.

[0062] 6. Using medical tape, secure the pressure sensor to the outer thigh at the same level as the centerline of the axilla.

[0063] 7. Turn on the monitoring device and enable the dynamic continuous monitoring mode for the patient's body temperature and bladder pressure. With the patient in a supine position, bladder pressure can be measured and reflected as dynamic intra-abdominal pressure.

[0064] The above drawings and embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. The numerical serial numbers such as 1, 2, 3, 4 and 5 are only used to distinguish different components rather than to specify the order. The top, head, tail and periphery are only used to express the distribution of the space rather than to limit the position. Although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention and do not constitute any limitation to the scope of protection of the present invention.

Claims

1. A double-balloon urinary catheter for dynamic monitoring of intra-abdominal pressure through the bladder, mainly comprising a urinary catheter body (100), a pressure measuring balloon (200), an anchoring balloon (300) and a conversion joint (400), characterized in that: The catheter body (100) is a flexible tube with 3 to 5 lumens inside. According to the different functions of the internal lumens of the catheter body (100), it is divided into three-lumen, four-lumen or five-lumen models. The pressure measuring balloon (200) is a non-compliant balloon made of a flexible film. The pressure measuring balloon (200) is arranged at the head of the catheter body (100). The interior of the pressure measuring balloon (200) is connected to the pressure measuring cavity of the second lumen (102) of the catheter body (100). The anchoring balloon (300) is a compliant balloon made of an elastic film material. The anchoring balloon (300) is arranged on the periphery of the front end of the catheter body (100) and is located downstream of the pressure measuring balloon (200). A urine diversion hole (500) is provided on the catheter body (100) between the two parts; a branch interface corresponding to the internal cavity is provided at the tail of the catheter body (100), and the number, shape and purpose of the branch interface match the internal cavity in which it is located one by one; the outer wall of the pressure measuring balloon (200) is not elastic, and after the rated liquid or gas is injected into the pressure measuring balloon (200), the interior of the pressure measuring balloon (200) will not cause interference pressure due to the expansion and contraction of its own outer wall; at the same time, the pressure measuring balloon (200) is arranged upstream of the anchoring balloon (300), and the outer peripheries of the two balloons do not contact each other. After the catheter is anchored in the bladder, the anchoring balloon (300) will not transmit the pressure generated by the catheter body (100) being pulled outside the body to the pressure measuring balloon (200).

2. A double-balloon urinary catheter for dynamic monitoring of intra-abdominal pressure via the bladder according to claim 1, characterized in that: The main physical property of the non-compliant balloon is that the outer wall has no stretchability or elasticity, or has only very little stretchability or elasticity. When liquid or gas is infused within a specified volume range, the outer wall of the pressure measuring balloon (200) will not expand or contract, nor will it generate a contraction force on the liquid inside the pressure measuring balloon (200).

3. The double-balloon urinary catheter for dynamic monitoring of intra-abdominal pressure via the bladder according to claim 1, characterized in that: According to the different outer diameters of the catheter body (100) adapted to the pressure measuring balloon (200), the volume of the pressure measuring balloon (200) is set to multiple specifications between 5ml and 30ml.

4. A double-balloon urinary catheter for dynamic monitoring of intra-abdominal pressure via the bladder according to claim 1, characterized in that: The types of pressure measuring balloons (200) used include catheter peripheral balloons or catheter tip balloons.

5. The double-balloon urinary catheter for dynamic monitoring of intra-abdominal pressure via bladder according to claim 1, characterized in that: The pressure measuring balloon (200) adopts a catheter head end balloon. The pressure measuring balloon (200) is arranged at the head end of the catheter body (100). The head end of the catheter body (100) enters the inner cavity of the pressure measuring balloon (200), and the head end of the catheter body (100) is completely enclosed inside the pressure measuring balloon (200).

6. The double-balloon urinary catheter for dynamic monitoring of intra-abdominal pressure via bladder according to claim 1, characterized in that: The distance between the anchoring balloon (300) and the pressure measuring balloon (200) is not less than 5 mm.

7. The double-balloon urinary catheter for dynamic monitoring of intra-abdominal pressure via bladder according to claim 1, characterized in that: An adapter is also provided on the outer periphery of the second branch interface (402), the adapter comprising a three-way connector, a two-way connector, and a spring self-locking connector, and the adapter is connected to the pressure measuring port of the pressure sensor using a pressure measuring extension pipeline.

8. The double-balloon urinary catheter for dynamic monitoring of intra-abdominal pressure via bladder according to claim 1, characterized in that: A micro pressure sensor is used and placed in the inner cavity of the second branch interface (402) or the adapter. The pressure sensor communicates with the monitoring device via a wire or a wireless communication module.

9. The double-balloon urinary catheter for dynamic monitoring of intra-abdominal pressure via bladder according to claim 1, characterized in that: The temperature sensor (600) is arranged at the front end of the fourth lumen (104) of the urinary catheter, the temperature sensor (600) terminal is welded to the temperature measuring wire (801), the temperature measuring wire (801) extends along the fourth lumen (104) to the periphery of the fourth branch interface (404), and the temperature measuring interface (800) is provided at the tail end of the temperature measuring wire (801).

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