Balloon catheters and endoscopes

Abstract

The present invention discloses an airbag catheter and an endoscope, and relates to the technical field of endoscopes. The airbag catheter comprises: a tube body and a balloon body. By arranging an air hole connected to the airbag in the pressure measuring area of the tube body, and arranging an air supply line on the outer surface of the pressure measuring area of the tube body, and arranging the air supply line to be connected to the air hole, and at the same time arranging an air distribution port connected to the balloon body along the air supply line, when the operator is in the process of deflating the balloon body, the balloon body will gradually stick to the tube body. At this time, the air remaining in the balloon body can be fully extracted from the balloon body through the air supply line between the balloon body and the tube body, avoiding the problem that the air hole is blocked in the process of the balloon body sticking to the tube body, which makes it difficult to fully extract the gas in the balloon body. At the same time, when the operator is inflating the balloon body, the gas can be evenly filled in the balloon body through the air supply line, ensuring that the expansion degree of each part in the balloon body is relatively uniform, which is convenient for the operator to use the airbag catheter for pressure measurement later.

Description

Technical Field

[0001] The present invention relates to the field of endoscopes, and in particular to an air bag catheter and an endoscope. Background Art

[0002] A balloon catheter is a medical device that usually consists of two parts: a catheter and a balloon. It mainly achieves its specific function through the inflation and deflation of the balloon.

[0003] When the balloon is inflated, it expands at a specific location within the body, making it particularly effective in measuring pressure levels within the human body. For example, when measuring intragastric pressure, the balloon of the balloon catheter is inflated and positioned within the patient's stomach. Pressing the patient's stomach compresses the balloon, allowing the operator to determine the patient's stomach pressure based on the change in force applied to the balloon.

[0004] However, prior art requires that the balloon catheter be tested for leaks before shipment or use. Specifically, sufficient gas is injected into the balloon to fully inflate it, followed by a test. Once the leak is confirmed, the gas is completely removed. For example, before inserting a balloon catheter into a patient, the air inside the balloon must be removed to facilitate smooth delivery to the desired location within the patient's body.

[0005] However, the balloon body may contact the outer surface of the catheter before the gas is completely extracted to prevent a small amount of gas from being extracted. This will cause the subsequent injection of a fixed amount of gas into the balloon to exceed the preset expansion level, thereby affecting the pressure measurement results. Summary of the Invention

[0006] The present invention discloses an airbag catheter and an endoscope, which can at least partially improve the above technical problems.

[0007] In order to solve the above problems, the present invention adopts the following technical solutions:

[0008] In one aspect, embodiments of the present application provide a balloon catheter comprising: a tube body and a balloon, wherein the outer surface of the tube body has a pressure measurement area. The balloon is wrapped around the tube body and covers at least the outer surface of the pressure measurement area of the tube body. The pressure measurement area of the tube body is provided with an air hole connected to the balloon, and the outer surface of the tube body at the pressure measurement area is also provided with a gas supply line, which is connected to the air hole and has a gas distribution port connected to the balloon along the gas supply line.

[0009] On the other hand, an embodiment of the present application further provides an endoscope, comprising the balloon catheter as described above.

[0010] The technical solution adopted by the present invention can achieve the following beneficial effects:

[0011] The balloon catheter provided in the embodiment of the present application is provided with an air hole connected to the air bag in the pressure measuring area of the tube body, and an air supply line is provided on the outer surface of the pressure measuring area of the tube body, and the air supply line is provided to be connected to the air hole, and an air distribution port connected to the balloon body is provided along the air supply line. When the operator is deflating the balloon body, a part of the balloon body may be closely attached to the outer surface of the tube body in advance to prevent the air flow from passing through there to the air hole or even seal the air hole. At this time, the gas that may have been blocked can enter from the nearby air distribution port and flow to the air hole through the air supply line provided in the area where the balloon body and the tube body are in close contact. The gas remaining in the balloon body can be more timely and fully extracted from the balloon body, and the air extraction volume at the air extraction end can be correctly matched with the air exhaust volume of the balloon body. In this way, the balloon body can be folded as close to the surface of the tube body as possible to facilitate insertion into the human body, and it can also ensure that the balloon body is in a suitable expansion degree after a certain amount of air is injected, so that the pressure measurement result is more accurate.

[0012] At the same time, the setting of the gas supply line can also prevent the operator from actively taking excessive suction to expel the gas in the balloon due to insufficient suction volume at the suction end, causing the balloon to stick to the outer surface of the catheter and difficult to separate during subsequent gas injection. To a certain extent, it can avoid insufficient expansion of the balloon and affect the pressure measurement results.

[0013] Furthermore, because the gas supply line, located on the outer surface of the catheter, is connected to the air hole and has gas distribution ports along its route, it can also distribute gas when filling the balloon with less than the test gas volume. This allows the operator to evenly distribute gas to other parts of the balloon through the gas supply line during balloon inflation, even if part of the balloon is in close contact with the outer surface of the catheter. This ensures that expansion is roughly synchronized throughout the balloon, maintaining uniform expansion. This can mitigate the degree of obstruction to gas flow caused by the contact area between the balloon and the outer surface of the catheter, allowing gas to be more evenly distributed around the contact area, allowing the contact area to be more or even completely separated from the outer surface of the catheter, facilitating more accurate pressure measurement using the balloon catheter. If the gas distribution port is located precisely where the balloon and the outer surface of the catheter are in close contact, some gas can escape from the port, forming bubbles that gradually expand, disrupting the integrity of the contact area between the balloon and the outer surface of the catheter from the inside, increasing the likelihood of the balloon being more or even completely separated from the outer surface of the catheter, facilitating more accurate pressure measurement using the balloon catheter. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 A schematic structural diagram of a balloon catheter in one embodiment of the present application is shown.

[0016] Figure 2 A partial structural schematic diagram of a balloon inflated in a balloon catheter according to one embodiment of the present application is shown.

[0017] Figure 3 A partial structural schematic diagram of another balloon catheter in an embodiment of the present application is shown when the balloon is inflated.

[0018] Figure 4 A partial structural schematic diagram of another balloon catheter in an embodiment of the present application is shown when the balloon is inflated.

[0019] Figure 5 A schematic diagram of a partial structure of a tube body in an air bag catheter in one embodiment of the present application is shown.

[0020] Figure 6 A partial structural schematic diagram from another perspective of a tube body in an air balloon catheter in one embodiment of the present application is shown.

[0021] Figure 7 A partial structural schematic diagram of a tube body in another balloon catheter in an embodiment of the present application is shown.

[0022] Figure 8 for Figure 7 Enlarged view of point B in the middle.

[0023] Figure 9 A partial structural schematic diagram of a tube body in another balloon catheter in an embodiment of the present application is shown.

[0024] Figure 10 A partial structural schematic diagram of a tube body in yet another balloon catheter in an embodiment of the present application is shown.

[0025] Figure 11 for Figure 3 Enlarged view of point A in the middle.

[0026] Figure 12 A schematic structural diagram of an endoscope in one embodiment of the present application is shown.

[0027] In the figure: 1. Endoscope; 10. Balloon catheter; 110. Tube body; 111. Pressure measuring area; 112. Air hole; 113. Gas transmission line; 1131. Axial section; 1132. Circumferential section; 114. Pressure measuring airway; 120. Balloon body; 130. Gas distribution port; 140. Cover membrane; 141. Hole. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without making any creative work are within the scope of protection of the present invention.

[0029] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0030] In each embodiment of the present application, "proximal end" and "distal end" refer to the position of each component relative to the user in the use environment, wherein the end closer to the user is designated as the "proximal end" and the end farther from the user is designated as the "distal end".

[0031] The inventive concept of this application is described here:

[0032] A balloon catheter is a medical device that usually consists of two parts: a catheter and a balloon. It mainly achieves its specific function through the inflation and deflation of the balloon.

[0033] When the balloon is inflated, it expands at a specific location within the body, making it particularly effective in measuring pressure levels within the human body. For example, when measuring intragastric pressure, the balloon of the balloon catheter is inflated and positioned within the patient's stomach. Pressing the patient's stomach compresses the balloon, allowing the operator to determine the patient's stomach pressure based on the change in force applied to the balloon.

[0034] However, prior art requires that the balloon catheter be tested for leaks before shipment or use. Specifically, sufficient gas is injected into the balloon to fully inflate it, followed by a test. Once the leak is confirmed, the gas is completely removed. For example, before inserting a balloon catheter into a patient, the air inside the balloon must be removed to facilitate smooth delivery to the desired location within the patient's body.

[0035] However, the balloon body may contact the outer surface of the catheter before the gas is completely extracted to prevent a small amount of gas from being extracted. This will cause the subsequent injection of a fixed amount of gas into the balloon to exceed the preset expansion level, thereby affecting the pressure measurement results.

[0036] The inventors discovered that the cause of this problem is that during the process of deflating the balloon, the balloon gradually approaches the tube and collapses toward the balloon. Because the balloon material has a certain degree of elasticity and forms a wrinkled shape when it collapses on the catheter, the balloon can easily clog the balloon's pores prematurely and / or cling to the outer surface of the catheter before the gas is completely expelled, hindering gas expulsion. Without continued suction or other measures, gas will remain in the balloon. If a fixed amount of gas is subsequently injected, the balloon's expansion will no longer be the preset level, affecting the accuracy of the pressure measurement results.

[0037] The inventors further discovered that forceful deflating may cause local deformation of the balloon or catheter, allowing gas to be expelled through gaps or squeezed, but this can also increase the contact strength between the balloon and the catheter or expand the contact area. When the balloon is subsequently inflated with a smaller volume of gas than that used for the airtightness test, since only the pores connect the balloon and the catheter, the gas flow from the catheter into the balloon has a single path. Consequently, during the process of inflating the balloon with a certain amount of gas, the gas is difficult to evenly distribute within the balloon, making it difficult for the balloon to detach from the outer surface of the catheter. This affects the balloon's expansion shape and ultimately the accuracy of the pressure measurement results.

[0038] Furthermore, surgeons vary in their suction strength and control of the degree of suction, and may over-inflate to ensure that the air in the cuff is completely removed. This can result in the cuff not fully expanding when a smaller volume of air is subsequently added than that used for the airtightness test, affecting the pressure measurement results.

[0039] Based on this, the inventors have provided a balloon catheter with a gas supply line installed on the outer surface of the tube at the pressure measurement area. This gas supply line can reduce the tendency of the balloon to converge toward the pore during degassing, thereby reducing or even preventing the possibility of pore blockage by the balloon, allowing the gas to be extracted as completely as possible. Specifically, the gas supply line can be connected to the interior of the balloon through a gas distribution port. During degassing, the gas no longer concentrates at the pore, but instead enters the gas supply line along the gas distribution port and is ultimately discharged from the pore, alleviating the problem of pore blockage by the balloon. Furthermore, during gas injection, the gas can be more evenly distributed within the balloon through the gas supply line and gas distribution port, allowing the balloon to be separated from the outer surface of the catheter as much as possible.

[0040] The following is combined with Figures 1 to 12 , a balloon catheter 10 provided in this application is described in detail through specific embodiments and application scenarios.

[0041] See also Figure 1 An embodiment of the present application provides a balloon catheter 10, which may include: a tube body 110 and a balloon 120, the balloon 120 may be wrapped around the outer surface of the tube body 110, and the balloon 120 may be connected to the tube body 110, and gas may be transported into the balloon 120 or extracted from the balloon 120 through the tube body 110.

[0042] For details, please refer to Figure 2-Figure 4 In this embodiment, the outer surface of the tube body 110 has a pressure measuring area 111, and the capsule 120 is wrapped around the tube body 110 and covers at least the outer surface of the pressure measuring area 111 of the tube body 110. The specific form and structure of the capsule 120 are not limited in this embodiment of the application.

[0043] For example, in one embodiment, the inner surface of the balloon 120 (the surface in close contact with the tube 110) can be provided with a structure for gas transmission, which can also facilitate gas exchange between the balloon 120 and the tube 110, thereby facilitating pressure measurement by the operator.

[0044] However, in this embodiment, since the inner surface of the balloon 120 is provided with a structure for gas transmission, the inner surface of the balloon 120 will be undulating. When the operator inflates the balloon 120, the balloon 120 may not expand uniformly due to the aforementioned undulating structure. At the same time, the balloon 120 may also be less sensitive to pressure due to the aforementioned undulating structure. Although this embodiment can facilitate gas exchange between the balloon 120 and the tube body 110, it will affect the pressure measurement results to a certain extent.

[0045] Therefore, in a preferred embodiment, the capsule 120 is a structure with smooth inner and outer surfaces. Compared with the aforementioned embodiment, the capsule 120 in the present application has a smooth inner surface, and can be more sensitive to pressure, which is beneficial to improving the accuracy of the operator's pressure measurement.

[0046] In this embodiment, the pressure measuring area 111 of the tube body 110 can be provided with an air hole 112 connected to the capsule 120, and the outer surface of the tube body 110 at the pressure measuring area 111 can be provided with a gas supply line 113, the gas supply line 113 is connected to the air hole 112, and the gas supply line 113 is provided with a gas distribution port 130 connected to the capsule 120 along the way.

[0047] It should be noted that when the operator deflates the balloon 120, gas can enter the gas delivery line 113 from the gas distribution port 130 and then enter the air hole 112 from the gas delivery line 113. Alternatively, gas can enter the air hole 112 directly from the balloon itself. This more diverse gas flow path alleviates the problem of balloon blockage at the air hole 112 and facilitates the operator to evenly evacuate the gas from the balloon 120. This avoids the operator forcing the balloon 120 to evacuate the gas, which could cause the balloon 120 to clog the air hole 112 and prevent the balloon 120 from fully expanding when the balloon 120 is subsequently inflated.

[0048] And when the operator inflates the bag 120, the gas can enter the bag 120 from the air hole 112. Specifically, after the gas is located in the air hole 112, the gas can move along the gas transmission line 113 and enter the bag 120 from the air hole 112 or the gas distribution port 130, thereby making the gas entering the bag 120 more evenly distributed in the bag 120, so that all parts of the bag 120 can expand evenly, avoiding or reducing the accumulation of gas in local areas of the bag 120, resulting in some areas of the bag 120 not expanding, affecting the subsequent pressure measurement of the operator.

[0049] In addition, when the operator evacuates the balloon 120, part of the gas can be directly extracted from the air hole 112, and the other part of the gas can be extracted from the air hole 112 after passing through the gas supply line 113 from the air distribution port 130. During this process, the suction force received at the air hole 112 is shared by the air distribution port 130, thereby reducing the force of the balloon 120 approaching the air hole 112, and thus delaying the progress of the balloon 120 approaching the air hole 112, which is conducive to uniform suction of the gas in the balloon 120, avoiding or reducing the problem that the balloon 120 blocks the air hole 112, causing the gas in the balloon 120 to block the air hole 112 during the suction process, making it difficult to fully suction the gas in the balloon 120.

[0050] The embodiments of the present application do not limit the specific location and number of the air holes 112. For example, in one embodiment, the air holes 112 can be set to 1-3. When the air holes 112 are set to 2 or 3, compared with setting only 1 air hole 112, this allows the capsule 120 and the tube body 110 to fully exchange gas while the tube body 110 can also maintain a higher structural strength.

[0051] Furthermore, the air hole 112 can be located at the end or the middle of the pressure measuring area 111, so that the gas can be more evenly distributed in the capsule 120 after passing through the air hole 112, or the gas can be more evenly extracted from the capsule 120. Specifically, when there is one air hole 112, the air hole 112 can be located in the middle of the pressure measuring area 111; when there are two air holes 112, the air holes 112 can be located at the two ends of the pressure measuring area 111; when there are three air holes 112, one air hole 112 can be located in the middle of the pressure measuring area 111, and the other two air holes 112 can be located at the two ends of the air holes 112, respectively. The specific arrangement can be made according to actual conditions.

[0052] The present application does not limit the specific form and structure of the gas line 113 and the gas distribution port 130. For example, in one embodiment, the gas line 113 can form a groove with the outer wall of the tube body 110, and the notch of the groove can serve as the gas distribution port 130. In this embodiment, the arrangement of the gas line 113 and the gas distribution port 130 is relatively simple, which not only facilitates the processing of the tube body 110, but also facilitates the assembly between the tube body 110 and the balloon body 120. Compared to the additional arrangement of other components or structures as the gas line 113, the embodiment of the present application directly arranges the groove on the surface of the tube body 110. This also has the effect of not increasing the size of the entire tube body 110, thereby facilitating the reduction of the structure of the entire balloon catheter.

[0053] Please also see Figure 3 and Figure 4 In another embodiment, the gas delivery line 113 may include a groove formed on the outer wall of the tube body 110 and a cover film 140 covering the notch of the groove. The width of the cover film 140 may be greater than the width of the notch of the groove. The cover film 140 may have a through hole connected to the groove to serve as the gas distribution port 130. When the operator inflates the balloon 120, the gas can prop up the cover film 140, thereby promoting the separation of the balloon 120 from the tube body 110.

[0054] In a preferred embodiment, when the operator deflates the capsule 120, the cover film 140 can collapse into the groove, but its maximum degree of collapse will not contact the bottom of the groove, leaving a channel for gas to flow between the cover film 140 and the groove, thereby facilitating the operator to perform a more thorough deflation operation on the capsule 120.

[0055] In a specific embodiment, the two ends of the groove can be connected end to end, that is, in this embodiment, the groove is an annular structure, so that after the gas enters the groove, the gas can flow clockwise or counterclockwise around the groove, that is, in this embodiment, the gas can have more diverse flow patterns, which can further facilitate gas exchange between the capsule 120 and the tube body 110.

[0056] In a preferred embodiment, the two ends of the groove may be disconnected, that is, in this embodiment, the groove is not arranged in a ring, for example, it can be arranged to be a C-shaped structure extending along the circumference of the tube, so as to avoid or reduce the problem of the structural strength of the tube body 110 being too low due to the setting of the groove.

[0057] Compared with the previous embodiment, a cover film 140 is additionally provided in this embodiment, so that the flow direction of the gas can be more controlled when the operator inflates the balloon 120. That is to say, in this embodiment, the air flow flows into the balloon 120 through a designated point, rather than flowing into the balloon 120 through a surface as in the previous embodiment. Therefore, in this embodiment, when the operator inflates the balloon 120, the balloon 120 can be further expanded more evenly when the gas fills the balloon 120.

[0058] Furthermore, in this embodiment, the through-hole can be offset from the axis of the air hole 112. That is, in this embodiment, when the operator inflates the airbag, the gas can first flow through the air hole 112 to the gas transmission line 113, and then from the gas transmission line 113 through the through-hole into the airbag. Because the air hole 112 and the through-hole are not coaxially arranged, the gas will not flow directly from the air hole 112 into the airbag. This can prevent a large amount of gas from entering the airbag through the air hole 112, causing the area near the air hole 112 to expand more than other areas of the airbag. At the same time, when the operator is deflating the airbag, the gas needs to first enter the gas supply line 113 from the through hole, and then flow from the gas supply line 113 through the air hole 112 to the tube body 110. This can prevent the balloon 120 from shrinking toward the air hole 112 too quickly, causing the balloon 120 to block the air hole 112. In this embodiment, the phenomenon of the balloon 120 blocking the air hole 112 can also be avoided, which can help the operator to extract the gas in the balloon 120 more fully.

[0059] In addition, the embodiment of the present application does not limit the specific structure and form of the cover film 140. For example, in one embodiment, the cover film 140 may only cover the notch of the groove, which can make the size of the entire tube body 110 smaller. Figure 7 As shown, for example, in another embodiment, the cover film 140 can be wrapped around the pressure measuring area 111 of the entire tube body 110, which can facilitate the assembly of the cover film 140 and the tube body 110, specifically helping to reduce the assembly accuracy of the cover film 140 and the tube body 110, and helping to reduce the production accuracy of the cover film 140 and the tube body 110.

[0060] In a more specific embodiment, see Figure 8 , the dotted area in the figure represents the gas transmission line 113. In this embodiment, a hole 141 can be opened on the cover film 140, and the position of the hole 141 is set corresponding to the position of the gas transmission line 113. In this embodiment, the hole 141 can be used as the gas distribution port 130.

[0061] Please also see Figure 5-10 In this embodiment, the gas transmission line 113 passes through at least a portion of the axial section 1131 and / or at least a portion of the circumferential section 1132 of the pressure measurement area 111. It should be noted that the axial section 1131 refers to the gas transmission line 113 extending in the axial direction, and the circumferential section 1132 refers to the gas transmission line 113 extending in the axial direction. It should be noted that the above-mentioned axial section 1131 and circumferential section 1132 do not take into account the circumferential portion or axial portion of the gas transmission line 113 caused by the width.

[0062] The embodiment of the present application does not limit the specific form and structure of the gas transmission line 113. For example, in one embodiment, Figure 5 and Figure 6 As shown, the gas transmission line 113 may include an axial section 1131 and a circumferential section 1132, and the axial section 1131 may be connected to the circumferential section 1132. For example, the connection point between the axial section 1131 and the circumferential section 1132 may be the air hole 112. In addition, the embodiment of the present application does not limit the specific number of axial sections 1131 and circumferential sections 1131, and can be specifically arranged according to actual conditions. In the embodiment shown in the figure, the axial sections 1131 and the circumferential sections 1132 may be distributed in a "well" shape. This can make the gas transmission lines 113 at various locations on the pressure measurement area 111 more evenly arranged, thereby making it easier for the operator to inflate or deflat the balloon 120.

[0063] Furthermore, in another embodiment, Figure 7-10As shown, the gas supply line 113 may also include an axial section 1131 and a circumferential section 1132. However, in this embodiment, the gas supply line 113 may extend spirally on the surface of the tube body 110. This may also allow the gas supply lines 113 at various locations on the pressure measuring area 111 to be arranged more evenly, thereby facilitating the operator to inflate or deflate the bag 120. In this embodiment, the gas supply line 113 occupies less space on the surface of the tube body 110, thereby helping to reduce the impact on the structural strength of the tube body 110. That is to say, the arrangement of the gas supply line 113 in the embodiment is conducive to improving the structural strength of the tube body 110.

[0064] In addition, the embodiment of the present application does not limit the width of the gas transmission line 113. It can be understood that the diameter of the tube body 110 is generally about 5.3 mm-7.3 mm. Therefore, the width of the gas transmission line 113 should not be set too large, which will result in a decrease in the structural strength of the tube body 110. The width of the gas transmission line 113 should not be set too small, which will make it difficult for the gas transmission line 113 to play the role of providing gas circulation. Therefore, in this embodiment, the width of the gas transmission line 113 can be set to 10μm-100μm.

[0065] In a specific embodiment, the width of at least part of the axial section 1131 of the gas transmission line 113 passing through the pressure measuring area 111 is 50 μm-100 μm, for example, it can be 50 μm, 60 μm, 85 μm or 100 μm, etc., and can be set according to actual conditions.

[0066] In another embodiment, the width of at least part of the circumferential section 1132 of the gas transmission line 113 passing through the pressure measuring area 111 is 10 μm-100 μm, for example, it can be 10 μm, 20 μm, 30 μm, 45 μm, 50 μm, 60 μm, 85 μm or 100 μm, etc., and can be set according to actual conditions.

[0067] It can be understood that in this embodiment, the axial section 1131 contributes more to the uniform suction of the gas in the capsule 120 than the circumferential section 1132. Therefore, in this embodiment, the width of the axial section 1131 can be greater than the width of the circumferential section 1132. It should be noted that when the gas transmission line 113 extends spirally on the surface of the tube body 110, the width of the axial section 1131 is the same as the width of the circumferential section 1132.

[0068] In addition, the embodiment of the present application does not limit the depth of the gas transmission line 113. It is understandable that the wall thickness of the tube body 110 is generally about 0.5 mm to 1.2 mm. Therefore, the depth of the gas transmission line 113 should not be too deep, as this will reduce the structural strength of the tube body 110. The width of the gas transmission line 113 should not be set too small, as this will make it difficult for the gas transmission line 113 to function as a gas supply. Therefore, in this embodiment, the depth of the gas transmission line 113 can be 20%-30% of the wall thickness of the tube body 110. For example, in a specific embodiment, the depth of the gas transmission line 113 can be 0.2 mm, 0.22 mm, 0.25 mm, or 0.3 mm, etc., and can be set according to actual conditions.

[0069] Please also see Figure 3 and Figure 11 In some embodiments, the tube body 110 may also be provided with a pressure measuring airway 114. The proximal end of the pressure measuring airway 114 may be connected to an external air valve, and the distal end of the pressure measuring airway 114 may be connected to the air hole 112. The pressure measuring airway 114 may be configured to inflate or deflat the air bag 120. The embodiments of this application do not limit the specific form and structure of the pressure measuring airway 114. For details, please refer to the relevant content in the prior art, and this application will not elaborate on it.

[0070] In summary, the balloon catheter 10 provided in the embodiment of the application is provided with an air hole 112 in communication with the air bag in the pressure measuring area 111 of the tube body 110, and an air supply line 113 is provided on the outer surface of the pressure measuring area 111 of the tube body 110, and the air supply line 113 is provided to be connected with the air hole 112, and an air distribution port 130 in communication with the balloon 120 is provided along the air supply line 113. When the operator is deflating the balloon 120, part of the balloon 120 may be The outer surface of the tube body 110 is closely attached in advance to prevent air flow from passing through here to the air hole 112, or even to seal the air hole 112. At this time, the gas that might have been blocked can enter from the nearby air distribution port 130 and flow to the air hole 112 through the air transmission line 113 set in the area where the bladder 120 and the tube body 110 are in close contact. This can more timely and fully extract the remaining gas in the bladder 120, and then ensure that the suction volume at the suction end and the exhaust volume of the bladder are correctly matched. This allows the bladder to be as close to the surface of the tube body 110 as possible to facilitate insertion into the human body, and also ensures that the bladder is at the appropriate expansion level after the quantitative amount of gas is injected, making the pressure measurement results more accurate.

[0071] At the same time, the setting of the gas supply line 113 can also prevent the operator from actively taking excessive suction to expel the gas in the balloon due to insufficient suction volume at the suction end, causing the balloon to stick to the outer surface of the catheter and difficult to separate during subsequent gas injection. To a certain extent, it can avoid insufficient expansion of the balloon and affect the pressure measurement results.

[0072] In addition, since the gas supply line 113 provided on the outer surface of the catheter is connected to the air hole 112 and is provided with a gas distribution port 130 along the way, it can also play a role in distributing gas when filling the balloon with gas less than the test gas volume. In this way, when the operator is inflating the balloon 120, even if part of the balloon is in close contact with the outer surface of the catheter, some gas can still be evenly filled into other parts of the balloon 120 through the gas supply line 113, ensuring that the expansion of various parts of the balloon 120 is roughly synchronized to maintain the uniformity of expansion. This can to a certain extent reduce the degree of obstruction to gas flow caused by the close contact between the balloon and the outer surface of the catheter, allowing the gas to be more evenly distributed around the close contact between the balloon and the outer surface of the catheter, so that the close contact between the balloon and the outer surface of the catheter can be more or even completely separated from the outer surface of the catheter, making it easier for the operator to use the balloon catheter 10 to perform more accurate pressure measurement. If the air distribution port 130 is located exactly at the position where the balloon and the outer surface of the catheter are in close contact, some gas can be discharged from the air distribution port 130 to form bubbles and gradually expand, thereby destroying the integrity of the part where the balloon and the outer surface of the catheter are in close contact from the inside, causing the balloon to be more likely to or even completely detach from the outer surface of the catheter, so that the subsequent operator can use the balloon catheter 10 to perform more accurate pressure measurement.

[0073] See also Figure 12 The present invention also provides an endoscope 1, which may include the aforementioned balloon catheter 10. In this embodiment, the endoscope 1 may be a bronchoscope, pyeloscope, esophagoscope, gastroscope, enteroscope, otoscope, rhinoscope, stomatoscope, laryngoscope, colposcope, laparoscope, arthroscope, or the like. The present invention does not impose any specific restrictions on the type of endoscope 1. The aforementioned endoscope 1, when combined with the balloon catheter 10, can also solve the aforementioned problem.

[0074] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0075] Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in reverse order depending on the functions involved. For example, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. Furthermore, features described with reference to certain examples may be combined in other examples.

[0076] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed by the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. A balloon catheter, characterized in that: The balloon catheter comprises: A tube body, wherein the outer surface of the tube body has a pressure measuring area, and the tube body is provided with a pressure measuring airway; a sac, the sac being wrapped around the tube and covering at least the outer surface of the pressure measuring area of the tube; The pressure measuring area of the tube body is provided with an air hole connected to the sac and one end of the pressure measuring air channel, and the outer surface of the tube body at the pressure measuring area is also provided with a gas transmission line, the gas transmission line is connected to the air hole and a gas distribution port connected to the sac is provided along the gas transmission line; The gas transmission line passes through all axial sections and all circumferential sections of the pressure measuring area; The gas transmission line extends spirally on the surface of the pipe body; The gas transmission line includes: a groove formed on the outer wall of the tube body and a cover film covering the notch of the groove along the way, the width of the cover film is greater than the width of the notch of the groove, and the cover film is provided with a through hole connected to the groove as the gas distribution port, wherein, when the balloon is inflated, the gas can prop up the cover film, and when the balloon is deflated, the cover film can collapse into the groove and does not contact the bottom of the groove.

2. The balloon catheter according to claim 1, wherein: The depth of the gas transmission line is 20%-30% of the wall thickness of the pipe body.

3. The balloon catheter according to claim 1, characterized in that The axes of the through hole and the air hole are staggered.

4. The balloon catheter according to claim 1, characterized in that The number of the air holes is 1-3; And / or, the air hole is located at the end or the middle of the pressure measuring area.

5. An endoscope, characterized in that: The invention comprises the balloon catheter according to any one of claims 1 to 4.

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