A catheter device and system for a lung function test

Abstract

The utility model relates to medical instrument technical field, concretely relates to a lung ventilation function inspection appearance special catheter device and system, the device includes core axle (1), handle (2), catheter (8) and balloon (4), wherein the catheter (8) is connected handle (2) and balloon (4), the core axle (1) passes handle (2) and catheter (8) to balloon (4). The utility model has the characteristics of accurate positioning, stable structure, not easy to bend and high airtightness.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a dedicated catheter device and system for a lung ventilation function testing instrument. Background Technology

[0002] Pulmonary ventilation function tests are an important means of assessing lung lesions and surgical prognosis. The core of these tests is to accurately monitor the gas exchange data of the target lung lobe.

[0003] CN118633991A discloses a clogging catheter for one-lung ventilation. Existing technology involves surgical procedures, where a balloon is used to block the lung segment to be operated on, allowing for external lung resections and other procedures. The balloon prevents blood and other debris from flowing back into the lung. This invention connects to a measuring device primarily to confirm whether bypass ventilation is available in the target lung segment.

[0004] In practice, CT scans of the interlobar fissures are commonly used to confirm the presence of bypass ventilation, but this method has a large margin of error and relies heavily on experience. However, using a dedicated catheter-assisted pulmonary ventilation function testing device can confirm the presence of bypass ventilation by measuring oxygen and carbon dioxide concentrations.

[0005] In existing technologies, catheters are commonly guided to the target lung lobe via bronchoscopy, requiring balloon inflation to seal the airway and isolate the detection area. However, such catheters have the following limitations in practical applications: insufficient reliability of balloon positioning, high vulnerability of the catheter structure, and difficulty in maintaining airtightness.

[0006] While some improvements have been made to address the aforementioned issues (such as optimizing balloon materials or adding pressure sensors), these solutions still suffer from drawbacks such as high cost, complex operation, or poor compatibility.

[0007] Therefore, there is an urgent need for a special catheter that combines precise positioning, structural stability and resistance to bending, and high airtightness to improve the reliability and operational efficiency of pulmonary ventilation function testing. Utility Model Content

[0008] This utility model provides a dedicated catheter device for a pulmonary ventilation function testing instrument. The device includes a mandrel, a handle, a catheter, and a balloon, wherein the catheter connects the handle and the balloon, and the mandrel passes through the handle and the catheter to the balloon.

[0009] In this invention, the handle is provided with a side tube to facilitate air in and out. The proximal end of the handle is connected to one end of the catheter, and the other end of the catheter is connected to the balloon. The "proximal end" refers to the end closer to the target position (target lung lobe), and the "distal end", "tail end", "tail" and "terminal end" refer to the end farther away from the target position.

[0010] In this utility model, as one embodiment, the handle has a Y-shaped structure, and the other end of the handle connected to the catheter includes a tail tube and a side tube. The mandrel passes through the tail tube, the handle, and the catheter to the balloon.

[0011] The mandrel inside the tail tube of the special catheter described in this invention can ensure that the catheter will not bend at a large angle when passing through the bronchoscope, thereby ensuring the stability of the catheter device.

[0012] In this utility model, as one embodiment, the side tube includes a side tube cavity, and the tail tube includes a tail tube cavity.

[0013] In this utility model, as one embodiment, the above-mentioned device is further provided with an air valve, which is bonded to the side tube.

[0014] Closing the air valve ensures that the balloon is fully inflated with gas. The air valve also prevents air leakage from the balloon after the syringe is withdrawn, which would prevent the balloon from inflating properly and affect its use.

[0015] In this utility model, as one embodiment, the air valve includes an upper air valve shell, a lower air valve shell, a valve core, and a spring.

[0016] In this utility model, as one embodiment, when a syringe (not shown) is inserted into the upper shell of the air valve and the valve core is pressed down, the spring is compressed to form a channel, and the airflow enters the balloon through the channel; after the syringe is pulled out, the spring pushes the valve core back towards the upper shell of the air valve, and the channel is closed.

[0017] In this invention, as one embodiment, the air valve inflates the balloon by closing it. When the balloon is not inflated, it adheres to the surface of the catheter and is not covered by anything.

[0018] In this utility model, as one embodiment, the catheter includes two cavities: a side cavity and a main cavity. The two ends of the side cavity are connected to the side cavity and the balloon, respectively, and the surface of the cavity at the connection position with the balloon has an opening for inflating the balloon. The main cavity is connected to the tail cavity.

[0019] In this invention, as one embodiment, an indicator ring is also provided at the connection between the catheter and the tail end of the balloon.

[0020] In this invention, as one embodiment, the indicator ring is fitted onto the catheter. The extension status of the balloon can be determined by observing the indicator ring through the display device of the bronchoscope. If the indicator ring is extended, the balloon is extended; if the indicator ring is not observed, it means that the balloon has not extended.

[0021] In this invention, as one embodiment, the device includes a reinforcing tube, which is sleeved on the outside of the catheter. One end of the catheter is connected to the handle through the reinforcing tube, and the other end of the catheter is connected to the balloon.

[0022] In this invention, as one embodiment, the device further includes a protective tube that encloses the conduit and the balloon. The balloon is not inflated before use, and the protective sleeve is placed on the outer surface of the balloon for protection.

[0023] In this invention, as one embodiment, the balloon, after inflation, blocks the target trachea, ensuring the accuracy of the pulmonary ventilation function test data. When the balloon is not inflated, it rests against the surface of the catheter without any external covering. The pulmonary ventilation function test monitors the oxygen and carbon dioxide concentrations around the balloon by connecting the connecting catheter to the tail tube of a dedicated catheter.

[0024] This utility model also provides a pulmonary ventilation function testing system, the system including the above-mentioned special catheter device, connecting catheter and pulmonary ventilation function testing instrument, the special catheter device being connected to the pulmonary ventilation function testing instrument via the connecting catheter.

[0025] In this invention, as one embodiment, an indicator ring is provided at the connection between the catheter and the tail end of the balloon. The catheter has a common ring structure, and the indicator ring is fitted on the catheter. By observing the indicator ring through the display device of the bronchoscope, the extension status of the balloon can be determined. If the indicator ring is extended, the balloon is extended; if the indicator ring is not observed, it means that the balloon has not been extended. The indicator ring facilitates confirmation of whether the balloon has been fully extended from the bronchoscope.

[0026] This invention provides a specialized catheter that combines precise positioning, structural stability to prevent bending, and high airtightness, thereby improving the reliability and operational efficiency of pulmonary ventilation function tests. When used in conjunction with a bronchoscope, this catheter can reach the target location through the bronchoscope's internal channels, ensuring precise positioning. The handle features a standard Luer connector structure, allowing connection to products with the same structure and guaranteeing high airtightness. Attached Figure Description

[0027] Figure 1 Example 1: Schematic diagram of the special catheter structure for the pulmonary ventilation function testing instrument;

[0028] Figure 2 Example 2: Schematic diagram of the special catheter structure for the lung ventilation function testing instrument with indicator ring;

[0029] Figure 3 Example 3: Schematic diagram of the special catheter structure for the lung ventilation function testing instrument with air valve described in Example 3;

[0030] Figure 4 : Schematic diagram of the location of the indicator ring 5 as described in Example 2;

[0031] Figure 5 : Schematic diagram of the structure of the air valve 7 described in Example 3;

[0032] Figure 6 : A schematic diagram showing the connection between the pulmonary ventilation function testing instrument, the connecting catheter, and the device of this utility model;

[0033] Figure 7 : Schematic diagram of the connection between the side lumen 24 and the catheter side channel 81;

[0034] Figure 8 : Schematic diagram of the passageway between the tail tube cavity 25 and the main catheter channel 82;

[0035] Figure 9 : Schematic diagram of the catheter side channel 81 and balloon 4 access route;

[0036] Explanation of reference numerals in the attached drawings: mandrel 1, cap 11, handle 2, side tube 21, side tube thread 22, tail tube 23, side tube cavity 24, tail tube cavity 25, tail tube thread 26, reinforcing tube 3, balloon 4, indicator ring 5, protective tube 6, air valve 7, catheter 8, catheter side channel 81, catheter main channel 82, upper air valve shell 71, lower air valve shell 72, valve core 73, spring 74, connecting catheter 9, lung ventilation function tester 10, device of this utility model 12. Detailed Implementation

[0037] The following embodiments are used to further illustrate the present invention, but do not limit the effective scope of the present invention in any way.

[0038] In this utility model, the "proximal end" is the end closest to the target position during surgery, and the "distal end," "terminal end," and "tail" are the ends furthest from the target position. The terms "set," "equipped," "connected," and "connected" in this utility model should be interpreted broadly, and can refer to fixed connections or non-fixed connections. Connection methods commonly used by those skilled in the art are all within the protection scope of this utility model.

[0039] The following embodiment is only one specific implementation method. Other similar or foreseeable implementation methods are all within the protection scope of this utility model.

[0040] Example 1

[0041] This embodiment discloses a special catheter for a pulmonary ventilation function testing device with a mandrel, such as... Figure 1As shown, its structure includes a spindle 1, a handle 2, a reinforcing tube 3, a conduit 8, a balloon 4, and a protective tube 6. The handle 2 is provided with a side tube 21 to facilitate the entry and exit of air. The proximal end of the handle 2 is connected to one end of the conduit 8, and the other end of the conduit 8 is connected to the balloon 4.

[0042] like Figure 1 As shown, the mandrel 1 has a cap 11 at its tail end. The cap can be screwed into the handle 2 via a thread 22. When not in use, the cap 11 at the leftmost end of the mandrel 1 is screwed into the handle 2, enclosing the mandrel 1. The mandrel 1 passes sequentially through the handle 2 and the conduit 8 to the balloon 4.

[0043] In this embodiment, the balloon 4, after inflation, blocks the target trachea, ensuring the accuracy of the pulmonary ventilation function test data. When the balloon 4 is not inflated, it rests against the surface of the catheter 8 without any external covering.

[0044] In this embodiment, the catheter 8 includes two cavities: a catheter side channel 81 and a catheter main channel 82. The two ends of the catheter side channel 81 are connected to the side channel 24 and the balloon 4, respectively. An opening is formed on the surface of the cavity at the connection point with the balloon 4 for inflating the balloon. Figure 7 , Figure 9 As shown; another cavity catheter main channel 82 is connected to the tail tube cavity 25 to accommodate the mandrel 1, as shown. Figure 8 As shown.

[0045] In this embodiment, as a preferred technical solution, the device is further provided with a reinforcing tube 3, which is sleeved on the outside of the conduit 8 to increase the strength of the conduit 8 and prevent bending. In practice, it is also feasible to have only the conduit 8 without the reinforcing tube 3, but the strength of the device will decrease and the conduit will be more prone to bending.

[0046] like Figure 1 As shown, the handle 2 is a tubular structure with a side tube 21 and a tail tube 23. The handle 2 has a side tube cavity 24 and a tail tube cavity 25 inside. The side tube cavity 24 is used for air intake and ventilation, and the tail tube cavity 25 is used for the spindle 1 to pass through. Figures 1-3 This is an external view of the device of this utility model. The specific internal structure of the handle 2 is shown below. Figure 7 and Figure 8 As the standard.

[0047] The device described in this embodiment also includes a protective tube 6, which encloses the catheter 8 and the balloon 4 for protection. The protective tube 6 must be removed before using the device.

[0048] In use, the protective tube 6 is removed from the catheter 8. After the special catheter (i.e. the device of this utility model) reaches the target lung lobe through the bronchoscope, air is injected into the balloon 4 from the side tube 21 of the handle 2 using a disposable syringe, causing the balloon 4 to inflate and block the trachea. The spindle 1 is pulled out from the tail tube 23 of the handle 2. The pulmonary ventilation function tester 10 is connected to the tail tube 23 of the special catheter handle 2 through the connecting catheter 9. The instrument confirms whether the target lung lobe has bypass ventilation by monitoring the oxygen and carbon dioxide concentration around the balloon 4.

[0049] In this embodiment, after the catheter reaches the target lung lobe through the bronchoscope, air is injected into the balloon 4 through the side tube 21 using a disposable syringe, causing the balloon 4 to inflate and block the trachea. The dedicated catheter contains a polytetrafluoroethylene (PTFE) mandrel 1, which ensures that the catheter does not bend at a large angle when passing through the bronchoscope. When reaching the designated position, the mandrel must be withdrawn from the tail end of the catheter. Its tail tube 23 is connected to the pulmonary ventilation function testing instrument 10 via the connecting tube 9, such as... Figure 6 As shown, this provides a channel for the pulmonary ventilation function testing instrument to monitor the oxygen and carbon dioxide concentrations around balloon 4.

[0050] In this embodiment, the pulmonary ventilation function testing device monitors the oxygen and carbon dioxide concentrations around the balloon 4 by connecting the connecting catheter to the tail tube of the dedicated catheter. The mandrel inside the tail tube of the dedicated catheter (i.e., the device in this embodiment) ensures that the catheter will not bend at a large angle when passing through the bronchoscope.

[0051] Example 2

[0052] This embodiment discloses a dedicated catheter for a pulmonary ventilation function testing instrument with a balloon position indicator ring, as shown in the figure. Its structure includes a mandrel 1, a handle 2, a reinforcing tube 3, a catheter 8, an indicator ring 5, a balloon 4, and a protective tube 6. Figure 2 As shown. Unless otherwise specified, the structure and function of the device in this embodiment are the same as those of the device described in Embodiment 1.

[0053] This embodiment specifically includes an indicator ring 5, which is located at the connection between the catheter 8 and the balloon tail end, such as... Figure 4 As shown, the indicator ring 5 can be seen appearing at the end of the bronchoscope's lumen through the bronchoscope's display device, indicating that the indicator ring 5 is fully extended. Because the indicator ring 5 is located at the tail of the balloon 4 near the handle, during use, the balloon 4 first extends from the tail of the bronchoscope's lumen, and then the indicator ring 5 extends. Therefore, the extension of the indicator ring 5 indicates that the balloon 4 has been extended.

[0054] The indicator ring 5 can be seen to emerge from the end of the bronchoscope's lumen through the bronchoscope's display device, indicating that the indicator ring 5 is fully extended. If the indicator ring 5 cannot be seen emerging from the end of the bronchoscope's lumen, it means that the indicator ring 5 is not extended.

[0055] In this embodiment, the indicator ring 5 is a black ring that is fitted onto the catheter 8 and is located at the end of the balloon 4, near the handle.

[0056] Before using this device, the protective tube 6 is removed from the catheter 8. After the special catheter (i.e. the device in this embodiment) reaches the target lung lobe through the bronchoscope, the indicator ring 5 is seen to be fully extended under the bronchoscope.

[0057] In this embodiment Figure 2 The image shows the external appearance; the internal structure of handle 2 is shown in the figure. Figure 7 and Figure 8 As the standard.

[0058] Using a disposable syringe, air is injected into the balloon 4 through the side tube 21 of the handle 2, causing the balloon 4 to inflate and block the trachea. The spindle 1 is then pulled out from the tail tube of the handle 2. The pulmonary ventilation function tester is connected to the tail tube 23 of the dedicated catheter handle 2 via a connecting tube. The instrument monitors the oxygen and carbon dioxide concentrations around the balloon 5 to confirm whether the target lung lobe has bypass ventilation.

[0059] In this embodiment, after the catheter reaches the target lung lobe through a bronchoscope, air is injected into the balloon 4 through the side tube 21 using a disposable syringe, causing the balloon 4 to inflate and block the trachea. Its tail tube 23 is connected to a pulmonary ventilation function testing device via a connecting tube, such as... Figure 6 As shown, this provides a channel for the pulmonary ventilation function testing device to monitor the oxygen and carbon dioxide concentrations around balloon 4. An indicator ring 5 is located near the handle at the tail of the balloon to facilitate confirmation that balloon 4 has fully extended from the bronchoscope.

[0060] In this embodiment, the balloon 4 has an indicator ring 5 near the handle at its tail to facilitate confirmation that the balloon has fully extended from the bronchoscope.

[0061] Example 3

[0062] This embodiment discloses a special catheter for a pulmonary ventilation function testing instrument with an air valve, such as... Figure 3 As shown, its structure includes a spindle 1, a handle 2, a reinforcing tube 3, a guide tube 8, a balloon 4, a protective tube 6, and a valve 7. Figure 3 As shown, Figure 3 This is an external view. Unless otherwise specified, the structure and function of the device in this embodiment are the same as those of the device described in Embodiment 1.

[0063] This embodiment is specifically equipped with an air valve 7, which is bonded to the side pipe 21, such as... Figure 5As shown, the air valve 7 comprises an upper valve shell 71, a lower valve shell 72, a valve core 73, and a spring 74. Balloon inflation: The syringe is inserted into the tube of the upper valve shell 71, pressing down on the valve core 73. The spring 74 is compressed, forming a channel through which airflow can enter the balloon 4. After the syringe is withdrawn, the spring 74 causes the valve core 73 to spring back towards the upper valve shell 71, closing the channel.

[0064] Before use, remove the protective tube 6 from the catheter 8; after the special catheter reaches the target lung lobe through the bronchoscope, use a disposable syringe to inject air into the balloon 4 through the air valve 6, causing the balloon 4 to inflate and block the trachea; pull the spindle 1 out from the tail tube 23 of the handle 2, and connect the pulmonary ventilation function tester to the tail tube 23 of the special catheter handle 2 through the connecting catheter. The instrument confirms whether there is bypass ventilation in the target lung lobe by monitoring the oxygen and carbon dioxide concentration around the balloon 4.

[0065] In this embodiment, after the dedicated catheter reaches the target lung lobe through a bronchoscope, air is injected into the balloon 4 through the side tube 21 using a disposable syringe, causing the balloon 4 to inflate and block the trachea. Its tail tube connects to a pulmonary ventilation function testing device via a connecting tube, providing a channel for the device to monitor the oxygen and carbon dioxide concentrations around the balloon. The balloon inflation tube 41 is equipped with an air valve 7. When the syringe is not connected to the air valve, the air valve is closed; when the syringe is connected to the air valve, the air valve is open, allowing the syringe to inject air into the balloon 4 or extract air from the balloon 4.

[0066] In this embodiment, the balloon is inflated to block the target trachea, ensuring the accuracy of the pulmonary ventilation function test data. The pulmonary ventilation function test instrument monitors the oxygen and carbon dioxide concentrations around the balloon by connecting a connecting tube to the tail tube of a dedicated catheter. Figure 6 As shown.

[0067] In this embodiment Figure 2 The image shows the external appearance; the internal structure of handle 2 is shown in the figure. Figure 7 and Figure 8 As the standard.

[0068] The air valve described in this embodiment can prevent air leakage from the balloon 4 after the syringe is pulled out, which would prevent the balloon 4 from being inflated and affect its use.

Claims

1. A dedicated catheter device for a pulmonary ventilation function testing instrument, characterized in that, The device includes a mandrel (1), a handle (2), a catheter (8), and a balloon (4), wherein the catheter (8) connects the handle (2) and the balloon (4), and the mandrel (1) passes through the handle (2) and the catheter (8) to the balloon (4). The device is also provided with an air valve (7); the air valve (7) includes an upper air valve shell (71), a lower air valve shell (72), a valve core (73), and a spring (74); The catheter (8) includes two channels: a side channel (81) and a main channel (82). The two ends of the side channel (81) are connected to the side channel (24) and the balloon (4) respectively, and the surface of the channel at the connection position with the balloon (4) is perforated for inflating the balloon. The main channel (82) is connected to the tail channel (25).

2. The apparatus according to claim 1, characterized in that, The handle (2) has a Y-shaped structure. The other end of the handle (2) connected to the catheter (8) includes a tail tube (23) and a side tube (21). The mandrel (1) passes through the tail tube (23) through the handle (2) and the catheter (8) to the balloon (4).

3. The apparatus according to claim 1, characterized in that, The mandrel (1) is provided with a cap (11) at the tail end, and the cap (11) is screwed into the handle (2) through the tail tube thread (26).

4. The apparatus according to claim 2, characterized in that, The side tube (21) includes a side tube cavity (24), and the tail tube (23) includes a tail tube cavity (25).

5. The apparatus according to claim 1, characterized in that, The air valve (7) is bonded to the side pipe (21).

6. The apparatus according to claim 1, characterized in that, When the syringe (not shown) is inserted into the upper shell (71) of the air valve (7) and the valve core (73) is pressed down, the spring (74) is compressed to form a channel, and the airflow enters the balloon (4) through the channel; after the syringe is pulled out, the spring (74) pushes the valve core (73) back towards the upper shell (71) of the air valve, and the channel is closed.

7. The apparatus according to claim 1, characterized in that, The air valve (7) inflates the balloon (4) by closing it. When the balloon (4) is not inflated, it is attached to the surface of the catheter (8) and is not covered by anything.

8. The apparatus according to claim 1, characterized in that, An indicator ring (5) is also provided at the connection between the catheter (8) and the tail end of the balloon.

9. The apparatus according to claim 8, characterized in that, The indicator ring (5) is fitted onto the catheter (8). The extension status of the balloon can be determined by observing the indicator ring (5) through the display device of the bronchoscope. If the indicator ring (5) is extended, the balloon (4) is extended. If the indicator ring (5) is not observed, it means that the balloon is not extended.

10. The apparatus according to claim 1, characterized in that, The device also includes a reinforcing tube (3), which is sleeved on the outside of the catheter (8). One end of the catheter (8) is connected to the handle (2) through the reinforcing tube (3), and the other end of the catheter (8) is connected to the balloon (4).

11. The apparatus according to claim 1, characterized in that, The device also includes a protective tube (6) that encloses the catheter (8) and the balloon (4).

12. A pulmonary ventilation function testing system, characterized in that, The system includes the device (12) according to any one of claims 1 to 11, a connecting catheter (9) and a pulmonary ventilation function tester (10), wherein the device (12) is connected to the pulmonary ventilation function tester (10) via the connecting catheter (9).

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