Novel efficient probe for cryotherapy under bronchoscope

Abstract

The utility model provides a novel efficient probe for cryotherapy under a bronchoscope, and relates to the field of bronchoscope probe structures, the novel efficient probe comprises a conduction part and a probe body, the probe body is installed at the end of the conduction part, and the probe body can contract and expand; when the probe contracts or expands, the surface area of the end portion of the probe increases. According to the utility model, the probe is arranged at the end part of the conduction part, so that an operator can control the position of the probe in the trachea of a human body by controlling the conduction part, and the surface area of the top of the probe is controlled by setting the probe into a retractable or expandable structure; the surface area of the top of the probe is increased by controlling contraction or expansion of the probe in the freezing process, so that the contact area between the probe and a human tracheal lesion position or the spraying area of the probe is increased, the treatment time of a bronchoscope is shortened, and the freezing efficiency is improved. And the risk of intraoperative and postoperative complications of the patient is reduced.

Description

Technical Field

[0001] The utility model relates to the field of bronchoscope probe structure, in particular to a novel high-efficiency probe used for cryotherapy under bronchoscope. Background Art

[0002] Bronchoscopy cryotherapy is a radiofrequency interventional technology used to treat bronchial diseases. It mainly eliminates abnormal tissues in the bronchi, including tumors, polyps and damaged tissues, by freezing, thereby improving the patient's symptoms and diseases.

[0003] Instrument principle: Bronchoscope cryotherapy mainly relies on the special physical properties of liquid nitrogen or oxygen, carbon dioxide or nitric oxide gas. The liquid nitrogen or oxygen, carbon dioxide or nitric oxide gas in the instrument is quickly converted into low-temperature gas through a special control system to form an extremely low-temperature cryoprobe. The cryoprobe is inserted into the human body through a bronchoscope, directly contacts the diseased tissue, and destroys abnormal cells by freezing.

[0004] Instructions: Anesthetize the patient: Before bronchoscopic cryotherapy, the patient needs to receive appropriate anesthesia or local anesthesia; Check the bronchi: Use a bronchoscope to check the location and range of the bronchi and lesion tissue to determine the target area for cryotherapy; Cryotherapy: Insert the cryoprobe into the channel in the bronchoscope, and under guidance, send the cryoprobe into the target area so that it is in direct contact with the lesion tissue; Cryocooling: Start the cryostat through the control system to convert liquid nitrogen or oxygen into extremely low temperature gas and cool the cryoprobe to the required temperature; The extremely low temperature of the cryoprobe will freeze the lesion tissue, destroy and kill abnormal cells; Observe the treatment effect: During the cryotherapy process, the doctor can observe the changes in the lesion tissue through the bronchoscope and adjust the cryotherapy according to the needs through appropriate operations; Temperature recovery: After the treatment, turn off the cryostat and the cryoprobe will gradually return to temperature; Before the probe is completely returned to temperature, you should wait for a while to avoid excessive stimulation to the patient; Bronchoscopy cryotherapy is a minimally invasive treatment method with the advantages of safety, effectiveness, and fast recovery; but it still requires experienced doctors to operate to ensure the effectiveness and safety of the treatment.

[0005] However, when using cryoprobes for treatment, the existing probes have a small freezing area, resulting in a long treatment time. For patients, the longer the operation time, the greater the risk of intraoperative and postoperative complications. Therefore, there is an urgent need for a probe with a large freezing area and high freezing efficiency. Utility Model Content

[0006] The purpose of the utility model is to provide a new and efficient probe for bronchoscopic cryotherapy, which, through a contraction or expansion structure, achieves the expansion of the probe's external surface area without affecting the movement of the probe in the trachea, so as to solve the problem in the prior art that the probe has a small freezing area, resulting in a long treatment time.

[0007] The embodiment of the utility model is realized by the following technical scheme: The embodiment of the utility model provides a new type of high-efficiency probe for cryotherapy under bronchoscopy, including a conducting part and a probe, the probe is installed at the end of the conducting part, and the probe can be contracted and expanded;

[0008] When the probe is contracted or expanded, the surface area of ​​the tip of the probe changes.

[0009] Preferably, the probe is a balloon, the conducting part is a hollow structure, and the balloon is connected to the conducting part;

[0010] When gas or liquid flows into the balloon from the conductive part, the balloon can expand elastically.

[0011] Preferably, the balloon is made of rubber material, a hollow chamber is formed inside the balloon, and the hollow chamber is connected to the hollow structure of the conducting part;

[0012] When gas or liquid flows from the conductive part into the balloon, the volume of the balloon increases.

[0013] Preferably, the balloon comprises a central mechanism and a side mechanism, and the side mechanism is hidden in the central mechanism;

[0014] When gas or liquid flows into the balloon from the conductive part, the side mechanism expands and leaks out to the central mechanism.

[0015] Preferably, the central mechanism is made of metal material, a hollow chamber is formed in the central mechanism, the side mechanisms are arranged in the hollow chamber, and the side mechanisms are made of elastic rubber material.

[0016] Preferably, the probe is a balloon, a hollow chamber is formed in the balloon, a spring is arranged in the hollow chamber, a pull wire is connected to the end of the spring, the end of the spring is connected to the end of the probe, and the pull wire passes through the conductive part and extends to the outside;

[0017] When the pull wire is pulled, the spring may contract or stretch, increasing or decreasing the surface area of ​​the end of the probe.

[0018] Preferably, one end of the spring is connected to the end of the probe, and the other end is connected to the pull wire;

[0019] When the spring is in a free state, the axial length of the balloon is greater than the radial length;

[0020] When the pull wire is pulled, the spring is stretched, the axial length of the balloon becomes smaller, and the radial length becomes larger.

[0021] Preferably, a baffle is provided at the connection between the conducting part and the balloon, an opening is provided on the baffle, and the radial size of the spring is larger than the size of the opening;

[0022] One end of the spring is connected to both the end of the probe and the pull wire, and the pull wire extends along the other end of the spring;

[0023] When the spring is in a free state, the axial length of the balloon is greater than the radial length;

[0024] When the pull wire is pulled, the spring is contracted, the axial length of the balloon becomes smaller, and the radial length becomes larger.

[0025] Preferably, the balloon is a bifurcated structure, including a central portion and a plurality of peripheral portions, and the peripheral portions may be away from or close to the central portion.

[0026] Preferably, a spring is provided in each periphery, one end of the spring is connected to the end of the periphery, and the other end is connected to the pull wire;

[0027] When the spring is in a free state, the peripheral portion is away from the central portion;

[0028] When the pull wire is pulled, the spring is stretched and enters the hollow structure of the conductive part, and the peripheral part approaches the central part.

[0029] Compared with the prior art, the embodiments of the present invention have the following advantages and beneficial effects:

[0030] 1. The utility model embodiment provides a new type of high-efficiency probe for cryotherapy under bronchoscopy. By setting the probe at the end of the conductive part, the operator can control the position of the probe in the human trachea by controlling the conductive part. When the refrigerant gas is introduced into the probe, the low temperature of the refrigerant gas can be transmitted to the probe, and the probe contacts or sprays the diseased part in the trachea to destroy abnormal cells by freezing. In the utility model embodiment, the probe is set to a contractible or expandable structure to control the surface area of ​​the top of the probe, so that the surface area of ​​the top of the probe can be increased by controlling the contraction or expansion of the probe during the freezing process. In this way, the contact area between the probe and the diseased part of the human trachea or the spraying area of ​​the probe can be increased, thereby increasing the freezing area, reducing the treatment time of the bronchoscopy, improving the freezing efficiency, and reducing the risk of intraoperative and postoperative complications for patients.

[0031] 2. The embodiments of the utility model provide four types of structures that can shrink or expand. The common point is that an elastic balloon (rubber material) is used or a spring is provided to control the shrinkage or expansion of the balloon, so as to achieve the purpose of increasing the freezing area. These four structures are simple in structure, suitable for patients to be treated by bronchoscopy, and are easy to operate and control and highly practical.

[0032] In general, the embodiments of the utility model provide a new type of efficient probe for bronchoscopic cryotherapy. The probe expands the surface area of ​​the probe through a contraction or expansion structure without affecting the movement of the probe in the trachea, so as to achieve the purpose of flexibly adjusting the freezing area of ​​the probe and reducing the treatment time. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the description of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0034] Figure 1 Schematic diagram of the probe structure provided in Example 1 of the utility model, wherein (a) is a schematic diagram of the probe structure before bronchoscope ventilation, and (b) is a schematic diagram of the probe structure after bronchoscope ventilation;

[0035] Figure 2 Schematic diagram of the probe structure provided in Example 2 of the utility model, wherein (a) is a schematic diagram of the probe structure before bronchoscope ventilation, and (b) is a schematic diagram of the probe structure after bronchoscope ventilation;

[0036] Figure 3 Schematic diagram of the probe structure provided in Example 3 of the utility model, wherein (a) is a schematic diagram of the probe structure when the spring is free, (b) is a schematic diagram of the probe structure after the spring is compressed, and (c) is a schematic diagram of the probe structure after the spring is stretched;

[0037] Figure 4 The schematic diagram of the probe structure provided in Example 4 of the utility model, wherein (a) is a schematic diagram of the probe structure when the peripheral part is closed at the central part, and (b) is a schematic diagram of the structure when the central part of the peripheral part is forked.

[0038] Description of reference numerals:

[0039] 1. Conducting part; 2. Probe; 3. Central mechanism; 4. Side mechanism; 5. Spring; 6. Pull wire; 7. Central part; 8. Peripheral part; 9. Baffle. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0041] The embodiment of the utility model provides a new type of efficient probe for bronchoscopic cryotherapy, including a conducting part 1 and a probe 2. The probe 2 is installed at the end of the conducting part 1, and the probe 2 can shrink and expand; when the probe 2 shrinks or expands, the surface area of ​​the end of the probe 2 can change. The embodiment of the utility model increases the surface area of ​​the end of the probe 2 by shrinking and expanding the probe 2, thereby improving the efficiency and speed of cryotherapy. Its specific working principle is: in the material and structural design of the probe 2, a contractile material or mechanism, such as a rubber balloon or a spring 5 mechanism, is used. When the probe 2 needs to be shrunk, the size of the probe 2 is controlled by external operation or inflation and deflation. When the surface area of ​​the probe 2 is relatively small, including the end surface area, it is suitable for controlling the movement of the probe 2. When the positioning of the probe 2 is determined and cryotherapy is required, the surface area of ​​the probe 2 can be increased by operation to achieve the purpose of increasing the freezing area of ​​the probe 2.

[0042] In the embodiment of the utility model, by controlling the contraction and expansion of the probe 2, the freezing area of ​​the probe 2 can be flexibly adjusted and controlled, thereby improving the treatment effect and speed. Compared with the fixed freezing area of ​​the existing probe, this new and efficient probe 2 has the following advantages: improving treatment efficiency, due to the adjustability of the freezing area, the target tissue can be frozen more quickly, shortening the operation time and treatment process; reducing surgical trauma, because the freezing area can be adjusted as needed, and the target tissue can be frozen more accurately and reduce damage to healthy tissue; improving treatment safety, by controlling the size of the freezing area, the freezing temperature and treatment range can be better controlled, reducing the risk of complications; increasing the scope of clinical application: due to the adjustable freezing area of ​​the probe 2, it can be applied to lesions of different sizes and locations, improving the adaptability and flexibility of treatment.

[0043] Next, examples 1 to 4 are provided to illustrate the structure of the probe 2 of the utility model, specifically:

[0044] The common point between Example 1 and Example 2 is that the probe 2 is a balloon, the conducting part 1 is a hollow structure, and the balloon is connected to the conducting part 1; when gas or liquid flows into the balloon from the conducting part 1, the balloon can be elastically expanded. Through the connection between the balloon and the conducting part 1, the elastic expansion of the balloon can be achieved by inputting gas or liquid. Specifically, the main body of the probe 2 is a balloon-like structure, using a flexible material such as medical rubber or silica gel, and the central part of the balloon is connected to the hollow structure of the conducting part 1. Through the hollow structure of the conducting part 1, gas or liquid can be introduced into the balloon. During the operation, the gas or liquid flowing into the balloon can be controlled by a gas source or a syringe, and the balloon is connected to the hollow part of the conducting part 1 through a valve or a pipeline. When gas or liquid flows into the balloon from the conducting part 1, the internal pressure of the balloon increases, and the balloon begins to expand automatically. Moreover, the characteristics of the elastic material of the balloon enable it to expand to the maximum size. In the actual operation, the doctor can control the degree of balloon expansion by controlling the pressure of the gas or liquid to accurately control the freezing area. In general, in the utility model embodiments 1 and 2, the balloon can be gradually expanded from its original state by inflating or liquid input. After the probe 2 is expanded, the surface area of ​​the balloon is relatively large, which can better contact the area to be cryotherapy, thereby improving the cryotherapy efficiency.

[0045] For example, Figure 1 As shown, in Example 1, the balloon is made of rubber material, and a hollow chamber is formed inside the balloon, which is connected to the hollow structure of the conductive part 1; when gas or liquid flows into the balloon from the conductive part 1, the volume of the balloon increases. Specifically, the hollow chamber allows gas or liquid to flow into the balloon from the conductive part 1, and the volume outside the balloon is increased by the natural expansion of the balloon. The increase in the volume of the balloon can provide a larger freezing area, thereby increasing the efficiency of cryotherapy. In addition, while the volume outside the balloon increases, the balloon can better fit the shape of the bronchus, making cryotherapy more uniform and precise. Figure 1 In (a), the probe 2 is connected to the conducting part 1, and no refrigerant gas or liquid has been filled into it. The probe 2 is in a natural state, i.e., a state with a minimum surface area. The doctor can determine the movement or staying position of the probe 2 in the patient's airway by controlling the conducting part 1 and observing the lesions in the patient's bronchus.

[0046] It should be noted that it should be understood that during the bronchoscopic examination, the doctor can operate by controlling the movement and position of the conducting part 1. For example, the doctor holds the conducting part 1 with his hand, usually with one finger on the top handle and other fingers holding the lower part; sometimes, the doctor may use an introducer to help guide the conducting part 1 into the airway. The introducer is a slender tool that can enter the airway through the channel of the conducting part 1 and provide additional control; the probe 2 is generally provided with a camera, and the doctor controls the movement of the conducting part 1 in the airway by rotating, pushing, pulling or tilting the conducting part 1. Rotation can change the direction of the camera, pushing and pulling can change the depth of the camera, and tilting can adjust the angle of the camera. The doctor observes the tissue and structure in the airway through the camera on the conducting part 1. The camera usually has a light source, which illuminates the airway through light transmission so that the doctor can see clearly. The structure and use method of the bronchoscope belong to the prior art. The utility model only improves the probe 2. As for the structure and use method of the bronchoscope, no more elaboration is made here.

[0047] Returning to the embodiment 1 of the present invention, Figure 1 (b) is the state after the probe 2 is filled with refrigeration gas or liquid. This state is a refrigeration state. Figure 1 (a), the surface area of ​​the probe 2 is significantly increased, which increases the freezing area. When the cryotherapy is completed, the freezing liquid or gas in the probe 2 can be extracted, so that the probe 2 can be restored to its original state. Figure 1 (a), the doctor can continue to control the smooth movement of the probe 2 in the patient's airway.

[0048] like Figure 2 As shown, it is a structure provided by Example 2 of the utility model. Specifically, the balloon includes a central mechanism 3 and a side mechanism 4, and the side mechanism 4 is hidden in the central mechanism 3; when gas or liquid flows into the balloon from the conductive part 1, the side mechanism 4 expands and leaks out of the central mechanism 3. Figure 2 (a) is the initial state when the probe 2 is not filled with refrigerated gas or liquid. At this time, the side mechanism 4 of the probe 2 is hidden in the central mechanism 3. For example, two side mechanisms 4 are provided, which are respectively provided on the two side edges of the central mechanism 3. The side mechanisms 4 are made of elastic material, such as rubber. When the probe 2 is filled with refrigerated gas or liquid, the elastic material of the side mechanism 4 will expand outwards under the action of the internal pressure of the central mechanism 3. Figure 2As shown in (b), the expanded and leaking side mechanism 4 is used to increase the freezing area of ​​the probe 2. It should be noted that the central mechanism 3 here can be made of elastic material or rigid metal material, and there is no restriction here, as long as it can achieve sufficient thermal conductivity. Exemplarily, the central mechanism 3 is made of metal material (stainless steel, etc.), and a hollow chamber is formed in the central mechanism 3 for accommodating freezing gas or liquid. The side mechanism 4 is arranged in the hollow chamber, and the side mechanism 4 is made of elastic rubber material.

[0049] The difference between the embodiment 3 and the embodiment 4 and the embodiment 1 and the embodiment 2 is that the embodiment 3 and the embodiment 4 further provide a spring 5 for telescopic cooperation. Specifically, Figure 3 and Figure 4 As shown, the probe 2 is also a balloon. In order to improve the thermal conductivity of the probe 2, the balloon here can be set to a metal material. Of course, in other embodiments, it can also be set to a rubber material. The balloon is also shaped into a hollow chamber, and a spring 5 is arranged in the hollow chamber. The end of the spring 5 is connected to a pull wire 6, and the end of the spring 5 is connected to the end of the probe 2. The pull wire 6 runs through the conductive part 1 and extends to the outside; when the pull wire 6 is pulled, the spring 5 can shrink or stretch, and the surface area of ​​the end of the probe 2 can increase or decrease. More specifically, when the doctor pulls the pull wire 6, the spring 5 will expand and contract, and the shape of the empty chamber in the balloon will change along the direction of the elastic force of the spring 5, resulting in a change in the surface area of ​​the end of the probe 2. The difference between this structure and Example 1 and Example 2 is that Example 1 and Example 2 control the freezing area by changing the overall volume of the probe 2, while Example 3 and Example 4 mainly control the freezing area by changing the shape of the probe 2. Here, the overall volume of the probe 2 hardly changes; and when the pull wire 6 is stretched, the spring 5 will stretch, and the shape of the balloon will change, resulting in a change in the surface area of ​​the end of the probe 2. This structure allows doctors to flexibly adjust the surface area of ​​the balloon end as needed to meet different treatment requirements. It should be noted that when using the balloon probe 2, doctors need to carefully adjust the shape of the balloon according to specific circumstances to avoid excessive or insufficient deformation to prevent possible side effects or poor treatment effects.

[0050] For Example 3, Figure 3 As shown, when the spring 5 is in a free state, Figure 3 (a), at this time, the probe 2 is a shuttle-shaped structure with the smallest end surface area. When the pull wire 6 is pulled, two state diagrams of the structure are provided here, one of which is as follows: Figure 3(c) The state shown in the figure, specifically, one end of the spring 5 is connected to the end of the probe 2, and the other end is connected to the pull wire 6; when the spring 5 is in a free state, the axial length of the balloon is greater than the radial length, that is, a shuttle-shaped structure; when the pull wire 6 is pulled, the spring 5 is stretched, the axial length of the balloon becomes smaller, and the radial length becomes larger, that is, a flat structure. When the probe 2 is in the flat structure, the surface area of ​​the end of the probe 2 increases, and the freezing area increases. The other is as follows Figure 3 (b) The state shown, specifically, a baffle 9 is provided at the connection between the conduction part 1 and the balloon, and an opening is provided on the baffle 9, and the radial size of the spring 5 is larger than the size of the opening; one end of the spring 5 is simultaneously connected to the end of the probe 2 and the pull wire 6, and the pull wire 6 extends along the other end of the spring 5; when the spring 5 is in a free state, the axial length of the balloon is larger than the radial length, that is, a shuttle-shaped structure; when the pull wire 6 is pulled, the spring 5 is contracted, the axial length of the balloon becomes smaller, and the radial length becomes larger, that is, a flat structure, at which time the surface area of ​​the end of the probe 2 increases, and the freezing area increases. Although both structures provided in Example 3 can be implemented, the difference is that when the probe 2 is a flat structure, the state of the spring 5 corresponding to one structure is a stretched state, and the state of the spring 5 corresponding to the other structure is a compressed state, both of which are achieved by pulling the pull wire 6, which is simple to operate and easy to control. When the cryotherapy is over, both structures only need to cancel the pulling force on the pull wire 6 to achieve the resetting of the spring 5, and at this time the probe 2 is restored. Figure 3 (a) Status.

[0051] As for Example 4, the difference from Example 3 is that the balloon is a bifurcated structure, including a central portion 7 and a plurality of peripheral portions 8, and the peripheral portions 8 can be far away from or close to the central portion 7. In this structure, when the peripheral portions 8 are far away from the central portion 7, the shape of the balloon is expanded, and the distance between the peripheral portions 8 and the central portion 7 will increase, resulting in a larger diameter of the entire balloon. In this way, a wider area can be covered and the treatment range can be increased; and when the peripheral portions 8 are close to the central portion 7, the shape of the balloon is contracted, and the distance between the peripheral portions 8 and the central portion 7 will decrease, resulting in a smaller diameter of the entire balloon. Specifically, as Figure 4 As shown, a spring 5 is arranged in each periphery, one end of the spring 5 is connected to the end of the periphery 8, and the other end is connected to the pull wire 6; when the spring 5 is in a free state, the periphery 8 is away from the center 7; when the pull wire 6 is pulled, the spring 5 is stretched and enters the hollow structure of the conductive part 1, and the periphery 8 approaches the center 7. For example, Figure 4 State (a) is when the doctor pulls the pull wire 6. At this time, the spring 5 of the peripheral part 8 is stretched under the action of the pulling force and extends into the hollow structure of the conductive part 1. At this time, under the action of the elastic force of the spring 5, the peripheral part 8 will move closer to the central part 7. This state is a state with a small freezing area. Figure 4As shown in (b), when the tension on the pull wire 6 is eliminated, the spring 5 is in a free state, at which time the peripheral portion 8 is away from the central portion 7, the probe 2 is expanded as a whole, and the freezing area is in an expanded state. This structure allows the doctor to control the stretching degree of the spring 5 by pulling the pull wire 6, thereby adjusting the distance between the peripheral portion 8 and the central portion 7, and then adjusting the shape and overall size of the balloon. The structure is simple and easy to operate. It should be noted that the number of peripheral portions 8 can be set according to actual needs, and there is no restriction here, as long as the required range of sufficient freezing area adjustment can be achieved.

[0052] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0053] It should also be noted that, in this article, the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations, nor can they be understood as indicating or implying relative importance. Moreover, the term "include" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or terminal 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 terminal device.

[0054] The above is a detailed introduction to a novel and efficient probe for bronchoscopic cryotherapy provided by the present application. The principles and implementation methods of the present application are described in detail using specific examples. The description of the above embodiments is only used to help understand the present application, and the content of this specification should not be construed as limiting the present application. At the same time, for those skilled in the art, according to the present application, there will be different forms of changes in the specific implementation methods and application scopes. It is not necessary and impossible to list all the implementation methods here, and the obvious changes or modifications derived therefrom are still within the protection scope of the present application.

Claims

1. A novel high-efficiency probe for bronchoscopic cryotherapy, comprising a conducting part (1) and a probe (2), characterized in that: The probe (2) is installed at the end of the conductive part (1), and the probe (2) can be contracted and expanded; When the probe (2) contracts or expands, the surface area of ​​the end of the probe (2) changes.

2. A novel high-efficiency probe for bronchoscopic cryotherapy according to claim 1, characterized in that: The probe (2) is a balloon, the conductive part (1) is a hollow structure, and the balloon is connected to the conductive part (1); When gas or liquid flows from the conductive part (1) into the balloon, the balloon expands elastically.

3. A novel high-efficiency probe for bronchoscopic cryotherapy according to claim 2, characterized in that: The balloon is made of rubber material, and a hollow chamber is formed inside the balloon, and the hollow chamber is connected to the hollow structure of the conducting part (1); When gas or liquid flows from the conductive part (1) into the balloon, the volume of the balloon increases.

4. A novel high-efficiency probe for bronchoscopic cryotherapy according to claim 2, characterized in that: The balloon comprises a central mechanism (3) and a side mechanism (4), wherein the side mechanism (4) is hidden in the central mechanism (3); When gas or liquid flows into the balloon from the conductive part (1), the side mechanism (4) expands and leaks out of the central mechanism (3).

5. A novel high-efficiency probe for bronchoscopic cryotherapy according to claim 4, characterized in that: The central mechanism (3) is made of a metal material, a hollow chamber is formed in the central mechanism (3), the side mechanism (4) is arranged in the hollow chamber, and the side mechanism (4) is made of an elastic rubber material.

6. A novel high-efficiency probe for bronchoscopic cryotherapy according to claim 1, characterized in that: The probe (2) is a balloon, a hollow chamber is formed in the balloon, a spring (5) is arranged in the hollow chamber, the end of the spring (5) is connected to a pull wire (6), the end of the spring (5) is connected to the end of the probe (2), and the pull wire (6) passes through the conductive part (1) and extends to the outside; When the pull wire (6) is pulled, the spring (5) may contract or stretch, and the surface area of ​​the end of the probe (2) may increase or decrease.

7. A novel high-efficiency probe for bronchoscopic cryotherapy according to claim 6, characterized in that: One end of the spring (5) is connected to the end of the probe (2), and the other end is connected to the pull wire (6); When the spring (5) is in a free state, the axial length of the balloon is greater than the radial length; When the pull wire (6) is pulled, the spring (5) is stretched, the axial length of the balloon becomes smaller, and the radial length becomes larger.

8. A novel high-efficiency probe for bronchoscopic cryotherapy according to claim 6, characterized in that: A baffle is provided at the connection between the conductive part (1) and the balloon, an opening is provided on the baffle, and the radial size of the spring (5) is larger than the size of the opening; One end of the spring (5) is connected to the end of the probe (2) and the pull wire (6) at the same time, and the pull wire (6) extends along the other end of the spring (5); When the spring (5) is in a free state, the axial length of the balloon is greater than the radial length; When the pull wire (6) is pulled, the spring (5) is contracted, the axial length of the balloon becomes smaller, and the radial length becomes larger.

9. A novel high-efficiency probe for bronchoscopic cryotherapy according to claim 6, characterized in that: The balloon is a bifurcated structure, comprising a central portion (7) and a plurality of peripheral portions (8), wherein the peripheral portions (8) can be away from or close to the central portion (7).

10. A novel high-efficiency probe for bronchoscopic cryotherapy according to claim 9, characterized in that: A spring (5) is arranged in each of the peripheries, one end of the spring (5) is connected to the end of the periphery (8), and the other end is connected to the pull wire (6); When the spring (5) is in a free state, the peripheral portion (8) is away from the central portion (7); When the pull wire (6) is pulled, the spring (5) is stretched and enters the hollow structure of the conductive part (1), and the peripheral part (8) approaches the central part (7).

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