Balloon catheter and endoscope

Abstract

The invention discloses a balloon catheter and an endoscope, and relates to the technical field of endoscopes. The balloon catheter comprises a catheter body and a balloon body. The air hole communicated with the air bag is formed in the pressure measuring area of the catheter body, the air conveying line is arranged on the outer surface of the pressure measuring area of the catheter body and communicated with the air hole, and the air distribution openings communicated with the bag body are formed in the air conveying line along the way. The bag body can be gradually attached to the tube body, at the moment, residual gas in the bag body can be fully pumped out of the bag body through the gas conveying line between the bag body and the tube body, and the problem that the gas in the bag body is difficult to be fully pumped out of the bag body due to the fact that the bag body blocks the gas holes in the process of being attached to the tube body is solved. Meanwhile, in the process that an operator inflates the balloon body, the balloon body can be evenly filled with gas through the gas conveying line, it is guaranteed that the expansion degrees of all the positions in the balloon body are even, and the follow-up operator can conveniently measure the pressure through the balloon catheter.

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 part of the body, which is effective in measuring the pressure intensity in the human body. For example, when measuring intragastric pressure, the balloon of the balloon catheter is inflated and located in the patient's stomach. By pressing the patient's stomach, the balloon of the balloon catheter is compressed, and the operator determines the pressure of the patient's stomach based on the change in the force on the balloon.

[0004] However, in the prior art, the airbag of the balloon catheter needs to be tested for sealing before leaving the factory or before use, specifically, sufficient gas is injected into the balloon to fully expand it and then relevant inspection is performed, and the gas needs to be completely extracted after the sealing is confirmed. For example, before the balloon catheter is sent into the patient's body, the air in the balloon needs to be extracted so that the balloon can be smoothly sent to the designated position in the patient's body.

[0005] However, the balloon body may contact the outer surface of the catheter in advance before the gas is completely extracted to prevent a small amount of gas from being extracted. This may cause the balloon to expand beyond the preset level after a certain amount of gas is subsequently injected, thereby affecting the pressure measurement results. Summary of the invention

[0006] The present invention discloses a balloon catheter and an endoscope, so as to at least partially improve the above technical problems.

[0007] In order to solve the above problems, the present invention adopts the following technical solutions: On the one hand, an embodiment of the present application provides a balloon catheter comprising: a tube body and a balloon body, wherein the outer surface of the tube body has a pressure measuring area. The balloon body is wrapped around the tube body and at least covers the outer surface of the pressure measuring area of ​​the tube body. The pressure measuring area of ​​the tube body is provided with an air hole connected to the balloon body, 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 the gas transmission line is provided with a gas distribution port connected to the balloon body along the way.

[0008] On the other hand, an embodiment of the present application further provides an endoscope, comprising the balloon catheter as described above.

[0009] The technical solution adopted by the present invention can achieve the following beneficial effects: The balloon catheter provided in the embodiment of the present application is provided with an air hole connected to the balloon 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 evacuating the balloon body, 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 here to the air hole or even seal the air hole. At this time, the gas that may be 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 residual gas in the balloon body can be more timely and fully extracted from the balloon body, and the air extraction amount at the air extraction end can be correctly matched with the air exhaust amount 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 gas is injected, so that the pressure measurement result is more accurate.

[0010] 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 the influence of insufficient balloon expansion on the pressure measurement results.

[0011] In addition, since the gas transmission line arranged on the outer surface of the catheter is connected to the air hole and a gas distribution port is arranged 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, 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 through the gas transmission line, ensuring that the expansion of various parts of the balloon is roughly synchronized to maintain the uniformity of expansion, which can weaken the degree of obstruction to gas flow caused by the part in close contact with the outer surface of the catheter to a certain extent, so that the gas can be more evenly distributed around the part in close contact with the outer surface of the catheter, so that the part in close contact with the outer surface of the balloon can be more or even completely separated from the outer surface of the catheter, so that the subsequent operator can use the balloon catheter for more accurate pressure measurement. If the gas distribution port is located exactly at the position where the balloon is in close contact with the outer surface of the catheter, some gas can also be discharged from the gas distribution port to form bubbles and gradually expand, so as to destroy the integrity of the part in close contact with the outer surface of the catheter from the inside, so as to make the balloon more likely to be separated from the outer surface of the catheter or even completely separated, so that the subsequent operator can use the balloon catheter for more accurate pressure measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

[0013] Figure 1 A schematic structural diagram of a balloon catheter in one embodiment of the present application is shown.

[0014] Figure 2 A partial structural schematic diagram of a balloon in a balloon catheter in an embodiment of the present application when the balloon is inflated is shown.

[0015] Figure 3 A partial structural schematic diagram of another balloon catheter in an embodiment of the present application when the middle balloon is inflated is shown.

[0016] Figure 4 A partial structural schematic diagram of another balloon catheter in an embodiment of the present application when the middle balloon is inflated is shown.

[0017] Figure 5 A partial structural schematic diagram of a tube body in an air bag catheter in one embodiment of the present application is shown.

[0018] Figure 6 A partial structural schematic diagram from another perspective of a tube body in an air bag catheter in one embodiment of the present application is shown.

[0019] Figure 7 A partial structural schematic diagram of a tube body in another balloon catheter in an embodiment of the present application is shown.

[0020] Figure 8 for Figure 7 Enlarged view of point B in the middle.

[0021] Fig. 9 A partial structural schematic diagram of a tube body in yet another balloon catheter in an embodiment of the present application is shown.

[0022] Fig.10 A partial structural schematic diagram of a tube body in yet another balloon catheter in an embodiment of the present application is shown.

[0023] Fig.11 for Figure 3 Enlarged view of point A in the middle.

[0024] Fig.12 A schematic structural diagram of an endoscope in one embodiment of the present application is shown.

[0025] 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

[0026] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0027] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0028] 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".

[0029] The inventive concept of the present application is described here: 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.

[0030] When the balloon is inflated, it expands at a specific part of the body, which is effective in measuring the pressure intensity in the human body. For example, when measuring intragastric pressure, the balloon of the balloon catheter is inflated and located in the patient's stomach. By pressing the patient's stomach, the balloon of the balloon catheter is compressed, and the operator determines the pressure of the patient's stomach based on the change in the force on the balloon.

[0031] However, in the prior art, the airbag of the balloon catheter needs to be tested for sealing before leaving the factory or before use, specifically, sufficient gas is injected into the balloon to fully expand it and then relevant inspection is performed, and the gas needs to be completely extracted after the sealing is confirmed. For example, before the balloon catheter is sent into the patient's body, the air in the balloon needs to be extracted so that the balloon can be smoothly sent to the designated position in the patient's body.

[0032] However, the balloon body may contact the outer surface of the catheter in advance before the gas is completely extracted to prevent a small amount of gas from being extracted. This may cause the balloon to expand beyond the preset level after a certain amount of gas is subsequently injected, thereby affecting the pressure measurement results.

[0033] The inventors found that the cause of the above problem is that during the process of evacuating the air from the air hole connecting the tube body and the balloon body, the balloon body gradually approaches the tube body and shrinks toward the air hole. Since the balloon body material has a certain elasticity and shrinks on the catheter in a folded form, when the gas is not completely exhausted, the air hole is easily blocked by the balloon body in advance and / or the balloon body and the outer surface of the catheter are tightly attached to hinder the gas discharge. If the suction is not continued or other measures are not taken, the gas will remain in the balloon body. If a certain amount of gas is subsequently injected, the expansion degree of the balloon body will no longer be the preset degree, which will affect the accuracy of the pressure measurement result.

[0034] The inventors further discovered that if the air is pumped out forcefully, although it may cause the balloon or the catheter to deform locally and the gas to be expelled from the gap or squeezed out, it will increase the close contact strength between the balloon and the catheter or expand the close contact area. When the balloon is subsequently filled with a smaller amount of gas than the amount of gas used to test air tightness, since only the pores connect the balloon and the tube, the path of the gas flowing from the tube into the balloon is single, which makes it difficult for the gas to be evenly distributed in the balloon during the process of filling the balloon with a certain amount of gas, making it difficult for the balloon to detach from the outer surface of the catheter, thereby affecting the balloon expansion shape and ultimately affecting the accuracy of the pressure measurement results.

[0035] In addition, the surgeon's suction force or control of the degree of suction may vary, and excessive suction may occur to ensure that the air in the airbag is sucked out. As a result, when the airbag is subsequently filled with a smaller amount of gas than the amount used to test air tightness, the airbag cannot be fully deployed, affecting the pressure measurement results.

[0036] Based on this, the inventor provides a balloon catheter, which is provided with a gas transmission line on the outer surface of the pressure measuring area of ​​the tube body. The gas transmission line can reduce the tendency of the balloon to shrink toward the pore during the air extraction process, thereby reducing or even avoiding the possibility of the pore being blocked by the balloon, so that the gas can be extracted as cleanly as possible. Specifically, the gas transmission line can be connected to the inside of the balloon through the gas distribution port. When the gas is extracted, the gas is no longer concentrated at the pore, but enters the gas transmission line along the gas distribution port and is finally discharged from the pore, which can alleviate the problem of the balloon blocking the pore. At the same time, in the process of injecting gas into the balloon, the gas can be more evenly distributed in the balloon through the gas transmission line and the gas distribution port, so that the balloon can be separated from the outer surface of the catheter as much as possible.

[0037] The following is combined with Figures 1 to 12 , a balloon catheter 10 provided in the present application is described in detail through specific embodiments and application scenarios.

[0038] 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 on 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 to the balloon 120 or extracted from the balloon 120 through the tube body 110.

[0039] 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 at least covers 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.

[0040] For example, in one embodiment, the inner surface of the balloon 120 (the surface in close contact with the tube 110) may 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.

[0041] 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 undulated. When the operator inflates the balloon 120, the balloon 120 may not expand evenly due to the aforementioned undulating structure. At the same time, the sensitivity of the balloon 120 to pressure may be reduced 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 result to a certain extent.

[0042] Therefore, in a preferred embodiment, the capsule 120 is a structure in which both the inner and outer surfaces are set to be smooth. Compared with the aforementioned embodiment, the capsule 120 in the present application can be more sensitive to pressure due to its smooth inner surface, which is beneficial to improving the accuracy of the operator's pressure measurement.

[0043] In this embodiment, the pressure measuring area 111 of the tube body 110 may be provided with an air hole 112 connected to the sac 120, and the outer surface of the tube body 110 at the pressure measuring area 111 may 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 sac 120 along the way.

[0044] It should be noted that when the operator evacuates the balloon 120, the gas can enter the gas transmission line 113 from the gas distribution port 130, and enter the air hole 112 from the gas transmission line 113. In addition, the gas can also directly enter the air hole 112 from the balloon. Since the gas flow path is more diverse, the problem of the balloon being blocked at the air hole 112 can be alleviated, and the operator can evenly extract the gas from the balloon 120. This can avoid the problem that the operator forcefully extracts the gas from the balloon 120, causing the balloon 120 to block the air hole 112, making it difficult for the balloon 120 to fully expand when the balloon 120 is subsequently inflated.

[0045] And when the operator inflates the balloon 120, the gas can enter the balloon 120 from the air hole 112. Specifically, when the gas is located in the air hole 112, the gas can move along the gas transmission line 113 and enter the balloon 120 from the air hole 112 or the air distribution port 130, thereby making the gas entering the balloon 120 more evenly distributed in the balloon 120, so that various parts of the balloon 120 can expand evenly, avoiding or reducing the accumulation of gas in local areas of the balloon 120, resulting in some areas of the balloon 120 not expanding, affecting the subsequent pressure measurement by the operator.

[0046] In addition, when the operator evacuates the balloon 120, part of the gas can be directly extracted from the pore 112, and the other part of the gas can be extracted from the pore 112 from the gas distribution port 130 through the gas supply line 113. During this process, the suction force received at the pore 112 is shared by the gas distribution port 130, thereby reducing the force of the balloon 120 approaching the pore 112, thereby delaying the progress of the balloon 120 approaching the pore 112, which is conducive to uniformly suctioning the gas in the balloon 120, avoiding or reducing the problem that the balloon 120 blocks the pore 112, causing the gas in the balloon 120 to block the pore 112 during the suction process, resulting in the gas in the balloon 120 being difficult to fully suction.

[0047] The embodiments of the present application do not limit the specific location and number of the pores 112. For example, in one embodiment, the pores 112 can be set to 1-3. When the pores 112 are set to 2 or 3, compared with only setting one pore 112, the sac 120 and the tube body 110 can fully exchange gases while the tube body 110 can maintain a higher structural strength.

[0048] And 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 the air hole 112 is set to one, the air hole 112 can be set in the middle of the pressure measuring area 111, when the air hole 112 is set to two, the air hole 112 can be set at the two ends of the pressure measuring area 111, when the air hole 112 is set to three, one of the air holes 112 can be set in the middle of the pressure measuring area 111, and the other two air holes 112 can be set at the two ends of the air hole 112 respectively, which can be set according to actual conditions.

[0049] The implementation of the present application does not limit the specific form and structure of the gas supply line 113 and the gas distribution port 130. For example, in one embodiment, the gas supply line 113 can form a groove with the outer wall of the tube body 110, and the notch of the groove can be used as the gas distribution port 130. In this embodiment, the arrangement of the gas supply line 113 and the gas distribution port 130 is relatively simple, which is not only convenient for processing the tube body 110, but also convenient for assembling the tube body 110 and the balloon body 120. Compared with setting other elements or structures as the gas supply line 113, the embodiment of the present application directly sets the groove on the surface of the tube body 110, which can also play the role of not increasing the size of the entire tube body 110, thereby facilitating the structure of the entire balloon catheter to be smaller.

[0050] Please also see Figure 3 and Figure 4 In another embodiment, the gas transmission line 113 may include: a groove formed with the outer wall of the tube body 110 and a cover film 140 covering the notch of the groove along the way, the width of the cover film 140 may be greater than the width of the notch of the groove, and the cover film 140 may be provided with a through hole connected to the groove 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.

[0051] In a preferred embodiment, when the operator deflates the balloon 120 , the cover film 140 may 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 precise deflation operation on the balloon 120 .

[0052] 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 the gas exchange between the capsule 120 and the tube body 110.

[0053] 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 too low structural strength of the tube body 110 due to the setting of the groove.

[0054] 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 controllable when the operator inflates the balloon 120. That is to say, in this embodiment, the airflow 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.

[0055] Furthermore, in this embodiment, the through hole can be arranged 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 flow from the gas transmission line 113 through the through hole into the airbag. Since the air hole 112 and the through hole are not arranged coaxially, the gas will not flow directly from the air hole 112 into the airbag, which can prevent a large amount of gas from entering the airbag from the air hole 112, causing the position near the air hole 112 in the airbag to expand more than other positions. At the same time, when the operator is deflating the air bag, 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 more fully extract the gas in the balloon 120.

[0056] 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, and specifically helps to reduce the assembly accuracy of the cover film 140 and the tube body 110, and helps to reduce the production accuracy of the cover film 140 and the tube body 110.

[0057] 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.

[0058] Please also see Figure 5-Figure 10 In this embodiment, the gas transmission line 113 passes through at least part of the axial section 1131 and / or at least part of the circumferential section 1132 of the pressure measuring 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 axial section 1131 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 part or axial part of the gas transmission line 113 caused by the width.

[0059] 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 an air hole 112. In addition, the embodiment of the present application does not limit the specific number of the axial section 1131 and the axial section 1131, and may be specifically set according to actual conditions. In the embodiment shown in the figure, the axial section 1131 and the circumferential section 1132 may be distributed in a "well" shape, so that the gas transmission lines 113 at various locations on the pressure measurement area 111 can be set more evenly, and thus it is convenient for the operator to inflate or exhaust the capsule 120.

[0060] In addition, in another embodiment, if Figure 7-Figure 10As shown, the gas supply line 113 may also include an axial section 1131 and a circumferential section 1132. However, in the present 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.

[0061] In addition, the embodiment of the present application does not limit the width of the gas transmission line 113. It is understandable 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 cause the structural strength of the tube body 110 to be reduced, and 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.

[0062] 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, 50 μm, 60 μm, 85 μm or 100 μm, etc., which can be set according to actual conditions.

[0063] 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 10μm-100μm, for example, it can be 10μm, 20μm, 30μm, 45μm, 50μm, 60μm, 85μm or 100μm, etc., and can be set according to actual conditions.

[0064] 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.

[0065] 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-1.2 mm. Therefore, the depth of the gas transmission line 113 should not be too deep, which will lead to a decrease in the structural strength of the tube body 110, and 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 gas circulation. 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., which can be set according to actual conditions.

[0066] Please also see Figure 3 and Fig.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, the distal end of the pressure measuring airway 114 may be connected to the air hole 112, and the pressure measuring airway 114 may be provided for inflating or deflating the balloon 120. The embodiment of the present application does not limit the specific form and structure of the pressure measuring airway 114, and the relevant contents in the prior art may be referred to for details, and the present application will not elaborate on them.

[0067] In summary, the balloon catheter 10 provided in the embodiment of the application is provided with an air hole 112 connected to the balloon 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 to the air hole 112, and an air distribution port 130 connected to the balloon body 120 is provided along the air supply line 113. When the operator is in the process of degassing 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 the air flow from passing through here to the air hole 112 or even seal the air hole 112. At this time, the gas that might be 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. The residual gas in the bladder 120 can be more timely and fully extracted from the bladder 120, and the air extraction amount at the air extraction end can be correctly matched with the air exhaust amount of the bladder. In this way, the bladder can be folded as close to the surface of the tube body 110 as possible to facilitate insertion into the human body, and it can also ensure that the bladder is in a suitable expansion degree after a certain amount of gas is injected, so that the pressure measurement result is more accurate.

[0068] 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 at the suction end, causing the balloon to stick to the outer surface of the catheter and difficult to separate during subsequent gas injection. This can to a certain extent avoid the situation where insufficient expansion of the balloon affects the pressure measurement results.

[0069] In addition, since the gas transmission line 113 disposed 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 transmission line 113, ensuring that the expansion of various parts of the balloon 120 is roughly synchronized to maintain the uniformity of expansion, which can to a certain extent weaken the degree of obstruction to gas flow caused by the part in close contact with the outer surface of the catheter, so that the gas can be more evenly distributed around the part in close contact with the outer surface of the catheter, so that the part in close contact with the balloon can be more or even completely separated from the outer surface of the catheter, which is convenient for the subsequent operator to use the balloon catheter 10 for more accurate pressure measurement. If the gas distribution port 130 is located at the position where the balloon and the outer surface of the catheter are in close contact, some gas can be discharged from the gas distribution port 130 to form bubbles and gradually expand, so as to destroy the integrity of the position 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.

[0070] See also Fig.12 The embodiment of the present application also provides an endoscope 1, which may include the balloon catheter 10 as described above. In the embodiment of the present application, the endoscope 1 may be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, an enteroscope, an otoscope, a rhinoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc. The embodiment of the present application does not specifically limit the type of the endoscope 1. The above-mentioned endoscope 1 can also solve the above-mentioned problem after applying the balloon catheter 10.

[0071] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0072] In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in a reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

[0073] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope 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; A sac, which is wrapped around the tube and covers at least the outer surface of the pressure measuring area of ​​the tube; Among them, the pressure measuring area of ​​the tube body is provided with an air hole connected to the sac, and the outer surface of the tube body at the pressure measuring 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 sac along the way.

2. The balloon catheter according to claim 1, characterized in that: The gas transmission line passes through at least a portion of the axial section and / or at least a portion of the circumferential section of the pressure measuring area.

3. The balloon catheter according to claim 2, characterized in that: The gas transmission line passes through at least part of the axial section of the pressure measuring area, and the width of the gas transmission line is 50 μm-100 μm; And / or, the gas transmission line passes through at least a partial circumferential section of the pressure measuring area, and the width of the gas transmission line is 10 μm-100 μm.

4. The balloon catheter according to claim 2, characterized in that: The gas transmission line passes through at least a part of the axial section and at least a part of the circumferential section of the pressure measuring area, and the gas transmission line extends spirally on the surface of the pipe body.

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

6. The balloon catheter according to any one of claims 1 to 5, characterized in that: The gas transmission line is a groove formed on the outer wall of the tube body, and the notch of the groove serves as the gas distribution port.

7. The balloon catheter according to any one of claims 1 to 5, characterized in that: 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.

8. The balloon catheter according to claim 7, characterized in that: The axes of the through hole and the air hole are staggered.

9. The balloon catheter according to claim 1, characterized in that: The tube body is provided with a pressure measuring airway, one end of which is connected to the air hole; And / or, the number of the pores is 1-3; And / or, the air hole is located at the end or the middle of the pressure measuring area.

10. An endoscope, characterized in that: Comprising the balloon catheter according to any one of claims 1-9.

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