Basket skeleton, basket balloon, basket electrode assembly, and basket catheter

Abstract

Disclosed in the present application are a basket skeleton, a basket balloon, a basket electrode assembly, and a basket catheter, relating to the technical field of medical devices. The basket catheter comprises a basket electrode assembly, the basket electrode assembly comprising a basket skeleton, electrode bodies and a basket balloon. The basket skeleton comprises a connection ring and bar-shaped elastic bodies, the bar-shaped elastic bodies being spaced apart in the circumferential direction of the connection ring, the distal end of each bar-shaped elastic body being bent to form a planar section, the free end of each planar section being bent to form a recess section, the recess sections being used for enclosing a recess region, and the connection ring being located inside the recess region. The basket skeleton does not cause harm to the human body and has higher safety. The basket balloon comprises a balloon having an annular structure, the balloon being divided into a first fixed section, a first deformable section, a second deformable section, a third deformable section and a second fixed section, which are different in thickness. The basket balloon has good performance in support and attachment and thus facilitates better contact between the electrode bodies and sites to be subjected to ablation via energy discharge, thereby achieving efficient discharge energy conversion.

Description

Net basket frame, net basket balloon, net basket electrode assembly and net basket conduit Technical Field

[0001] This application relates to the field of medical device technology, specifically to a basket skeleton, a basket balloon, a basket electrode assembly, and a basket catheter. Background Technology

[0002] Atrial fibrillation (AF) is one of the most common arrhythmias in clinical practice. It is characterized by the loss of orderly electrical activity under the control of sinus rhythm in the atria, which is replaced by rapid and disordered fibrillation waves. As a result, the atria lose effective contraction and relaxation, the pumping function deteriorates or is lost, and the ventricles respond very irregularly. It is one of the main causes of sudden cardiac death.

[0003] Effective treatments for atrial fibrillation aim to restore sinus rhythm and are mainly divided into two categories: drug therapy and non-drug therapy. Drug therapy is mainly suitable for newly diagnosed atrial fibrillation and paroxysmal atrial fibrillation patients without relevant contraindications. It can control ventricular heart rate and ensure basic cardiac function through medication, such as beta-blockers, amiodarone, and digitalis. Non-drug therapy mainly includes anticoagulation therapy, electrical cardioversion, surgical maze procedure, and interventional therapy.

[0004] Interventional diagnosis and treatment is a modern medical technology that has been rapidly adopted in recent decades. It typically utilizes various catheter devices of different structures, shapes, and sizes to establish a channel between the patient's lesion site and the external operating point. This allows for the delivery of various diagnostic and therapeutic instruments, drugs, and implantable devices to the lesion site, or the drainage of bodily fluids from the lesion site. In the medical field, many types of interventional catheter devices exist, such as guiding catheters, delivery sheaths, and drainage catheters. Interventional catheters usually have an inner lumen through which drugs, bodily fluids, and instruments can pass. Due to the tortuous nature of the human cardiovascular circulatory system, interventional catheters must simultaneously possess good flexibility, torsion control, guidance, and sufficient axial and radial support. Furthermore, during the design and manufacturing process of interventional catheters, the distal end is made into different curved shapes according to different intended uses to adapt to the anatomical morphology of the lumen at specific lesion sites, ensuring that the distal end of the catheter is aligned with the lesion site and precisely guiding the instruments or drugs within the catheter to the lesion. In recent years, numerous distally pre-shaped interventional catheters have been developed and used in clinical treatment.

[0005] However, in clinical practice, individual differences in the anatomical structure of human lumens are frequently encountered. Even distal pre-shaped sheaths designed according to specific human physiological and anatomical structures often fail to adapt to individualized lumens, hindering surgical procedures and consequently affecting surgical outcomes. To prevent such problems during surgery, surgeons typically prepare several distal pre-shaped sheaths of different sizes. If the selected catheter's distal shape is found to be unsuitable for the lesion site, the catheter is withdrawn from the lumen, and a different size pre-shaped catheter is selected and reinserted. Sometimes, it is even necessary to reshape the distal end of the sheath to the required shape on-site according to the patient's physiological and anatomical structure. This undoubtedly increases the cost to the patient, increases the complexity of the surgical procedure, and prolongs the patient's exposure to X-rays, which is detrimental to the patient's health.

[0006] The basket catheters commonly used in existing technologies are mostly standard spherical in shape, and their tips may cause injury to the human body. Furthermore, since the baskets are usually made of a soft nickel-titanium substrate, they are prone to deformation, affecting their effectiveness. While some existing technologies use balloons for support, these balloons are typically spherical. For example, the attached drawings of patent application CN114343831A show that it uses a spherical balloon. This type of spherical balloon cannot fit the basket shape well, failing to provide sufficient support. More importantly, poor contact between the balloon and the basket significantly affects the ablation and discharge effect. Therefore, optimizing the contact between the balloon and the basket helps improve the success rate of the procedure. Summary of the Invention

[0007] One objective of this application is to provide a basket frame, basket electrode assembly, and basket conduit that are less likely to cause harm to the human body at the top and have higher safety.

[0008] Another objective of this application is to provide a basketball balloon, a basketball electrode assembly, and a basketball conduit with balloon support and good balloon support fit.

[0009] To achieve the above objectives, the technical solution adopted in this application is as follows: a basket frame, including a connecting ring and at least three strip-shaped elastomers, wherein the middle part of the connecting ring is used to form an instrument channel; each strip-shaped elastomer is arranged at intervals along the circumferential direction of the connecting ring; each strip-shaped elastomer is divided into a distal end and a proximal end along the axial direction of the connecting ring, and the proximal end of each strip-shaped elastomer is used to connect to the catheter body; the distal end of each strip-shaped elastomer is bent radially inward along the connecting ring to form a planar segment, and the free end of the planar segment is bent towards the proximal end to form a concave segment before connecting to the connecting ring, each concave segment is used to form a concave region, and the connecting ring is located inside the concave region.

[0010] Preferably, the connecting ring has a slot for connecting the concave section at one end near the proximal end or on the outer side wall of the connecting ring.

[0011] Preferably, the distance from the planar segment to the connecting ring along the axial direction of the connecting ring is 1mm-2mm.

[0012] Preferably, the depth of the concave region along the axial direction of the connecting ring is 1 / 3 to 1 / 2 of the radial dimension of the basket frame.

[0013] This application also provides a tennis basketball balloon, including a balloon with an annular structure, and the balloon is divided into a first fixed segment, a first deformable segment, a second deformable segment, a third deformable segment, and a second fixed segment along the proximal end to the distal end; the first fixed segment is connected to a medium input conduit and forms a seal, and the second fixed segment is connected to a connecting ring and forms a seal; the thickness of the first deformable segment is equal or the thickness of the first deformable segment increases sequentially in the direction away from the first fixed segment; the thickness of the second deformable segment increases sequentially in the direction away from the first deformable segment; the third deformable segment is bent toward the interior of the balloon, and the thickness of the third deformable segment decreases sequentially in the direction away from the second deformable segment, and the minimum thickness of the third deformable segment is greater than the maximum thickness of the first deformable segment.

[0014] Preferably, the second fixing segment is folded back along the central axis of the balloon towards the direction of the first fixing segment, and the outer side of the second fixing segment is bonded to the outer ring surface of the connecting ring.

[0015] Preferably, the minimum thickness of the first deformation segment is greater than or equal to 0.2 mm, the difference between the thickness of the second deformation segment at the end away from the first deformation segment and the thickness of the first deformation segment is 0.1 mm to 0.4 mm, and the difference between the thickness of the second deformation segment at the end away from the first deformation segment and the thickness of the third deformation segment at the end away from the second deformation segment is 0.1 mm to 0.4 mm.

[0016] Preferably, before the balloon is inflated, the distance from the third deformed segment along the axial direction of the connecting ring to the bottom of the concave segment is 1mm-2mm.

[0017] Preferably, the lengths of the first fixing segment and the second fixing segment along the axial direction of the connecting ring are 1mm-2mm.

[0018] Preferably, the radial distance between the first deformable segment and the central axis of the balloon increases sequentially in the direction away from the first fixed segment.

[0019] Preferably, before the balloon is inflated, the radial dimension of the balloon is smaller than the radial dimension of the concave region.

[0020] This application also provides a basket electrode assembly, including a basket frame and an electrode body, wherein the electrode body is disposed on the outer side of a planar segment on the basket frame.

[0021] Preferably, each of the planar segments is provided with a plurality of electrode bodies spaced apart along its length.

[0022] Preferably, the basket electrode assembly further includes the basket bag.

[0023] This application also provides a basket conduit, including the basket electrode assembly.

[0024] Compared with the prior art, the beneficial effects of this application are as follows: (1) The basket frame provided in this application has a planar segment formed by bending the distal end of each strip-shaped elastic body radially inward along the connecting ring. Under the action of the planar segment, the front end of the basket frame is a planar surface, thereby making the electrode body installed on it form a surface contact with the part of the human body to be ablated and discharged (traditional spherical contact is point contact), and the contact area is higher (the more actual contact area, the better). At the same time, since the planar segment is arranged radially along the connecting ring, that is, the plane formed by the front end of the basket frame is perpendicular to the axis of the connecting ring, the vertical support force is greater and more stable, so it is not easy to cause significant deformation due to pressure when contacting the part to be ablated and discharged. Furthermore, since the free end of the planar segment is bent towards the proximal end to form a concave segment before connecting to the connecting ring, each of the concave segments is used to enclose a concave region, and the connecting ring is located inside the concave region; therefore, under the action of the concave region, during the movement of the basket skeleton in the human body, the distal end of the strip-shaped elastomer or the connecting ring will not produce a protruding structure, let alone a sharp protruding structure, thereby reducing abrupt contact with the part to be ablated and discharged, thus not causing harm to the human body and making it safer.

[0025] (2) In the balloon provided in this application, under the influence of the thickness difference of the first deformation segment, the second deformation segment, and the third deformation segment on the balloon, during the inflation process after the balloon is filled with a medium, since the first deformation segment has the smallest thickness and is closer to the proximal end of the strip-shaped elastomer, the first deformation segment will be stretched first, thereby expanding the first deformation segment and gradually supporting the strip-shaped body; then, since the thickness of the second deformation segment gradually increases in the direction away from the first deformation segment, and the thickness of the third deformation segment gradually decreases in the direction away from the second deformation segment, and the minimum thickness of the third deformation segment is greater than or equal to the maximum thickness of the first deformation segment, there is a point on the first deformation segment with the same thickness as the minimum thickness of the third deformation segment (if the minimum thickness of the third deformation segment is equal to the maximum thickness of the first deformation segment, then this point is located at the intersection of the second deformation segment and the first deformation segment). The boundary point (i.e., the point at which the balloon is stretched and expanded reaches that point) is the minimum thickness of the third deformation segment (i.e., the junction between the third deformation segment and the second fixed segment). At this time, the third deformation segment expands synchronously towards the second deformation segment and the corresponding point on the second deformation segment towards the third deformation segment. This causes the second deformation to support the strip-shaped elastomer and pull the third deformation segment to first extend radially along the connecting ring, and finally expand to the outside of the position where the concave area is formed on the strip-shaped elastomer. Ultimately, the balloon gradually comes into contact with the inside of the strip-shaped elastomer "step by step", achieving complete contact. By improving the contact of the balloon, the electrode body on the outside of the strip-shaped elastomer can better contact the position where discharge ablation is required, reducing the diffusion of discharge ablation energy to other useless positions and achieving efficient discharge conversion.

[0026] (3) The beneficial effects of the basket electrode assembly and the basket conduit are the same as those of the basket skeleton and the basket bladder, and will not be described in detail here. Attached Figure Description

[0027] Figure 1 is a perspective view of a basketball hoop frame provided in this application.

[0028] Figure 2 is a cross-sectional view of the basket frame in Figure 1 provided in this application.

[0029] Figure 3 is an enlarged view of the balloon in Figure 2 provided in this application.

[0030] Figure 4 is a cross-sectional view of another type of balloon provided in this application.

[0031] Figure 5 is a cross-sectional view of another type of balloon provided in this application.

[0032] Figure 6 is a top view of a basket electrode assembly provided in this application.

[0033] Figure 7 is a cross-sectional view of a partial structure of a basket guide tube provided in this application.

[0034] Figure 8 is a partial enlarged view of point I in Figure 7 provided in this application.

[0035] Figure 9 is a partial enlarged view of point II in Figure 7 provided in this application.

[0036] Figure 10 is a diagram showing the state of the balloon after inflation as shown in Figure 7 of this application.

[0037] Figure 11 is a partial enlarged view of point III in Figure 10 provided in this application.

[0038] Figure 12 is a photograph of the balloon in Figure 1 after it has been inflated, as provided in this application.

[0039] Figure 13 is a photograph of the balloon after it has been inflated, as shown in Figure 4 provided in this application.

[0040] In the diagram: 1. Basket frame; 11. Connecting ring; 111. Slot; 12. Strip-shaped elastomer; 121. Concave region; 122. Planar segment; 13. Fixing ring; 14. Balloon; 141. First fixing segment; 142. First deformation segment; 143. Second deformation segment; 144. Third deformation segment; 145. Second fixing segment; 2. Electrode body; 21. Concentric circles; 3. Catheter body; 4. Media inlet catheter; 5. Instrument catheter. Detailed Implementation

[0041] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0042] In the description of this application, it should be noted that directional terms such as "center," "lateral," "longitudinal," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific scope of protection of this application. The terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. The terms "comprising" and "having," and any variations thereof, in the specification and claims of this application, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices.

[0043] Referring to Figures 1 and 2, one embodiment of this application provides a basket frame 1, including a connecting ring 11 and at least three strip-shaped elastomers 12. The middle part of the connecting ring 11 is used to form an instrument channel. Each strip-shaped elastomer 12 is arranged at intervals along the circumferential direction of the connecting ring 11. Each strip-shaped elastomer 12 is divided into a distal end and a proximal end along the axial direction of the connecting ring 11. The proximal end of each strip-shaped elastomer 12 is used to connect to the catheter body 3. The distal end of each strip-shaped elastomer 12 is bent radially inward along the connecting ring 11 to form a planar segment 122. The free end of the planar segment 122 is bent towards the proximal end to form a concave segment before connecting to the connecting ring 11. Each concave segment is used to form a concave region 121, and the connecting ring 11 is located inside the concave region 121.

[0044] In this embodiment, the basket frame 1 has planar segments 122 formed by the radial inward bending of the distal ends of each strip-shaped elastic body 12 along the connecting ring 11. Under the action of the planar segments 122, the front end of the basket frame 1 (i.e., the upper part of Figure 2) is planar, thereby allowing the electrode body 2 (as shown in Figure 6) mounted on it to form surface contact with the part of the human body to be ablated and discharged, resulting in a higher contact area than traditional spherical contact (i.e., point contact) (the more actual contact area, the better). At the same time, since the planar segments 122 are arranged radially along the connecting ring 11, that is, the plane formed by the front end of the basket frame 1 is perpendicular to the axis of the connecting ring 11, the vertical support force is greater and more stable, thus making it less likely to undergo significant deformation due to pressure when contacting the part to be ablated and discharged. Furthermore, since the free end of the planar segment 122 is bent towards the proximal end to form a concave segment before connecting to the connecting ring 11, each concave segment is used to form a concave region 121, and the connecting ring 11 is located inside the concave region 121; under the action of the concave region 121, during the movement of the basket frame 1 in the human body, the distal end of the strip-shaped elastomer 12 or the connecting ring 11 will not produce a protruding structure, let alone a sharp protruding structure, thereby reducing abrupt contact with the part to be ablated and discharged, so it will not cause harm to the human body and is safer.

[0045] As shown in Figure 1, in this embodiment, in order to improve the effect of discharge ablation, the number of strip-shaped elastomers 12 is preferably eight.

[0046] As shown in Figure 8, in this embodiment, the connecting ring 11 is further provided with a slot 111 for inserting the distal end at one end near the proximal end of the strip-shaped elastomer 12 or on the outer side wall of the connecting ring 11. The distal end of the strip-shaped elastomer 12 is preferably inserted from the end of the connecting ring 11 near the proximal end of the strip-shaped elastomer 12.

[0047] As shown in Figure 2, in this embodiment, the distance from the plane segment 122 along the axial direction of the connecting ring 11 to the connecting ring 11 is most suitable when it is 1mm-2mm. If it is too shallow, the effect of avoiding abrupt contact is not obvious, and if it is too deep, it is easy to cause deformation of the basket frame 1.

[0048] As shown in Figure 2, in this embodiment, the depth of the concave region 121 along the axial direction of the connecting ring 11 is most suitable when it is 1 / 3 to 1 / 2 of the radial dimension of the basket frame 1. The concave section corresponding to this dimension is least likely to deform in the human body.

[0049] As shown in Figure 2, in this embodiment, when the free end of the planar segment 122 is bent toward the proximal end, it is parallel to the axial direction of the connecting ring 11.

[0050] It is understandable that the proximal end of the strip-shaped elastomer 12 can be directly installed and fixed on the catheter body 3, or the proximal ends of each strip-shaped elastomer 12 can be integrated into the fixing ring 13 first, and then the fixing ring 13 can be installed and fixed on the catheter body 3.

[0051] Referring to Figures 1 and 2, in order to support the basket frame 1, a balloon 14 can be installed inside each strip-shaped elastic body 12. The balloon 14, when inflated, supports each strip-shaped elastic body 12, and a clearance channel is provided through the balloon 14 at the position corresponding to the instrument channel. By filling the balloon 14 with a medium (such as liquid or gas), the balloon 14 is inflated, thereby supporting each strip-shaped elastic body 12.

[0052] It should be understood that this application does not limit the specific structure of the balloon 14, and only three specific structures (i.e., structure one, structure two and structure three) are provided below for reference.

[0053] Structure 1: As shown in Figure 3, the balloon 14 has a ring-shaped structure, and is divided into a first fixed section 141, a first deformable section 142, a second deformable section 143, a third deformable section 144, and a second fixed section 145 along the proximal-to-distal direction. The first fixed section 141 is connected to the medium inlet conduit 4 and forms a seal, and the second fixed section 145 is connected to the connecting ring 11 and forms a seal. The thickness of the first deformable section 142 is equal or the thickness of the first deformable section 142 moves away from the first fixed section 141. The thickness of the first deformable segment 142 increases sequentially in the direction away from the first fixed segment 141, and the radial distance between the first deformable segment 142 and the central axis of the balloon 14 increases sequentially in the direction away from the first fixed segment 141; the thickness of the second deformable segment 143 increases sequentially in the direction away from the first deformable segment 142; the third deformable segment 144 bends toward the interior of the balloon 14, and the thickness of the third deformable segment 144 decreases sequentially in the direction away from the second deformable segment 143, and the minimum thickness of the third deformable segment 144 is greater than the maximum thickness of the first deformable segment 142.

[0054] The working principle of the balloon 14 is as follows: Referring to Figures 2, 3, and 7 to 11, due to the thickness difference between the first deformation segment 142, the second deformation segment 143, and the third deformation segment 144, during the inflation process of the balloon 14 after the medium is filled into it, the first deformation segment 142, being the thinnest and closer to the proximal end of the strip-shaped elastomer 12, will be stretched first, causing it to expand and gradually support the strip-shaped body; subsequently, due to the thickness difference between the second deformation segment 143 and the third deformation segment 144, the balloon 144 will expand and gradually support the strip-shaped body; then, due to the thickness difference between the second deformation segment 143 and the third deformation segment 144, the balloon 144 will expand and gradually support the strip-shaped body; next ... The thickness of the third deformation segment 144 gradually increases away from the first deformation segment 142, while the thickness of the third deformation segment 144 gradually decreases away from the second deformation segment 143. The minimum thickness of the third deformation segment 144 is greater than or equal to the maximum thickness of the first deformation segment 142. Therefore, there exists a point on the first deformation segment 142 with the same thickness as the minimum thickness of the third deformation segment 144. (If the minimum thickness of the third deformation segment 144 is equal to the maximum thickness of the first deformation segment 142, then this point is located between the second deformation segment 143 and the first deformation segment 144.) The point at the junction of segment 142, that is, taking this point as the boundary, when the position of the balloon 14 being stretched and expanded reaches this point, the minimum thickness position of the third deformation segment 144 (i.e., the junction between the third deformation segment 144 and the second fixed segment 145) begins to produce tensile deformation. At this time, the third deformation segment 144 expands synchronously towards the second deformation segment 143, and the corresponding position on the second deformation segment 143 expands synchronously towards the third deformation segment 144, thereby causing the second deformation support strip elastic body 12 to be pulled. The third deformation segment 144 first extends radially along the connecting ring 11, and then expands to the outside of the position where the concave region 121 is formed on the supporting strip elastic body 12. Finally, the balloon 14 gradually comes into contact with the inside of the strip elastic body 12 "step by step" to achieve complete contact (as shown in Figure 12). By improving the contact of the balloon 14, the electrode body 2 on the outside of the strip elastic body 12 can make better contact with the position where discharge ablation is required, reducing the diffusion of discharge ablation energy to other useless positions and achieving efficient discharge conversion.

[0055] As shown in Figures 3 and 8, the second fixing segment 145 is preferably folded back along the central axis of the balloon 14 towards the direction of the first fixing segment 141, and the outer side of the second fixing segment 145 is bonded to the outer ring surface of the connecting ring 11. Referring to Figure 11, under the action of this folding structure, when the third deformable segment 144 is stretched and expanded, it will adhere to the bending direction of the strip-shaped elastomer 12, making close contact with the strip-shaped elastomer 12. This allows the balloon 14 to closely adhere to the inner wall of the strip-shaped elastomer 12, supporting and maintaining the shape of the strip-shaped elastomer 12. This enhances the strength of the strip-shaped elastomer 12 after it forms a basket without changing the shape of the basket, thus allowing the electrode body 2 to fully contact the inner wall of the lesion site for discharge ablation, reducing energy loss and greatly improving the ablation effect. Simultaneously, with different ring-shaped electrode bodies 2 and a large number of electrode bodies 2, surface ablation can be achieved, eliminating the need for particularly precise point ablation locations, making it convenient for the user to operate.

[0056] As shown in Figure 3, preferably, the minimum thickness of the first deformable segment 142 is greater than or equal to 0.2 mm, the thickness of the second deformable segment 143 at the end away from the first deformable segment 142 is 0.1 mm to 0.4 mm, and the thickness of the second deformable segment 143 at the end away from the first deformable segment 142 is 0.1 mm to 0.4 mm, and the thickness of the third deformable segment 144 at the end away from the second deformable segment 143 is 0.1 mm to 0.4 mm.

[0057] As shown in Figure 3, the lengths of the first fixing segment 141 and the second fixing segment 145 along the axial direction of the connecting ring 11 are preferably 1mm-2mm.

[0058] As shown in Figure 8, before the balloon 14 is inflated, the distance from the third deformed section 144 along the axial direction of the connecting ring 11 to the bottom of the concave section is preferably 1mm-2mm, so as to avoid the balloon 14 from being squeezed and rubbed against the concave section before it is inflated.

[0059] As shown in Figure 8, before the balloon 14 is inflated, its radial dimension is smaller than that of the concave region 121. Since the basket frame 1 needs to contract before entering the human body (i.e., the strip-shaped elastic body 12 in Figure 7 contracts towards the center), the radial dimension of the balloon 14 is smaller than that of the concave region 121, thus avoiding compression friction between the balloon 14 and the strip-shaped elastic body 12.

[0060] Structure Two: As shown in Figure 4, the balloon 14 is shaped to match the "ear" shape of the strip-shaped elastomer 12, and there is no folding structure at the position corresponding to the second fixed segment 145. This is the structure that is easiest to think of during the design process. However, after experimentation, it was found that although the shape of this structure fits the shape of the strip-shaped elastomer 12 better, during the inflation process, compared with Structure One, the "ear" position in Structure Two is more likely to support the strip-shaped elastomer 12 to deformation and has poor fit. As shown in Figure 13, either the top of the "ear" of the balloon 14 does not contact the inner side of the strip-shaped elastomer 12, or the two sides of the "ear" of the balloon 14 are not reliable and the gap is large. Simultaneous expansion can easily cause the strip-shaped elastomer 12 to deform locally.

[0061] Structure 3: As shown in Figure 5, the balloon 14 is ellipsoidal before inflation, and its two ends are open installation structures, and the installation method is the same as that of Structure 1.

[0062] Referring to Figures 1, 2 and 6, this embodiment provides a basket electrode assembly, including the basket frame 1 and the electrode body 2 as in embodiment 1. The electrode body 2 is adapted to be disposed on the outer side of the planar segment 122 on the basket frame 1.

[0063] It should be understood that the installation method of the electrode body 2 and the basket frame 1, as well as the working principle of the electrode body 2, are all existing technologies and will not be described in detail here.

[0064] In this embodiment, as shown in FIG6, multiple electrode bodies 2 are spaced apart along the length of each planar segment 122. At this time, each electrode body 2 located at the same position on each strip-shaped elastic body 12 is located on the same concentric circle 21, while each electrode body 2 located at different positions on each strip-shaped elastic body 12 is located on concentric circles 21 of different ring shapes, thereby achieving adaptation to different working ranges.

[0065] In this embodiment, the basket electrode assembly may further include any one of the balloons 14 in Embodiment 2 (i.e., the balloon 14 in Structure 1, Structure 2, or Structure 3). Preferably, it is the balloon 14 in Structure 1.

[0066] Referring to Figures 7 to 11, this application also provides a basket conduit, including the basket electrode assembly of Embodiment 3.

[0067] It should be understood that this application does not limit the specific structure of the basket catheter. The following is only one specific structure for reference: the proximal end of each strip-shaped elastomer 12, or a fixing ring 13 integrated at each proximal end, is fixed to the catheter body 3 of the basket catheter. A handle is provided at the end of the catheter body 3 away from the strip-shaped elastomer 12. The instrument catheter 5 of the basket catheter is inserted into the catheter body 3. One end of the instrument catheter 5 is sealed to the inner wall of the connecting ring 11, and the other end of the instrument catheter 5 is connected to the handle. The handle has an operating part that allows the instrument catheter 5 to slide relative to the catheter body 3. When relative sliding occurs between the instrument catheter 5 and the catheter body 3, the size of the shape supported by the strip-shaped elastomer 12 can be adjusted. A medium input catheter 4 is also provided between the instrument catheter 5 and the catheter body 3. The outer wall of the medium input catheter 4 near the connecting ring 11 is bonded to the inner wall of the first fixing section 141. A gap is formed between the inner wall of the medium input catheter 4 and the outer wall of the instrument catheter 5, through which liquid or gaseous media can be easily introduced into or discharged from the balloon 14.

[0068] It is understandable that the specific structure and working principle of the handle and operating part are existing technologies, and will not be described in detail here.

[0069] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made without departing from the spirit and scope of this application, and all such changes and modifications fall within the scope of protection claimed by this application. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A basket frame, characterized in that, include: A connecting ring, the middle of which is used to form an instrument channel; as well as At least three strip-shaped elastomers are arranged at intervals along the circumferential direction of the connecting ring; each strip-shaped elastomer is divided into a distal end and a proximal end along the axial direction of the connecting ring, and the proximal end of each strip-shaped elastomer is used to connect to the catheter body; the distal end of each strip-shaped elastomer is bent radially inward along the connecting ring to form a planar segment, and the free end of the planar segment is bent towards the proximal end to form a concave segment before connecting to the connecting ring, and each concave segment is used to form a concave region, and the connecting ring is located inside the concave region.

2. The basket frame as described in claim 1, characterized in that, The connecting ring has a slot for connecting the concave section at one end near the proximal end or on the outer side wall of the connecting ring. And / or, the distance from the planar segment to the connecting ring along the axial direction of the connecting ring is 1mm-2mm; And / or, the depth of the concave region along the axial direction of the connecting ring is 1 / 3 to 1 / 2 of the radial dimension of the basket frame.

3. A tennis ball bladder, comprising a ball bladder, characterized in that, The balloon has a ring-shaped structure, and along the proximal to distal direction of the strip-shaped elastomer, it is divided into a first fixed segment, a first deformable segment, a second deformable segment, a third deformable segment, and a second fixed segment. The first fixed segment is connected to the medium inlet conduit and forms a seal, and the second fixed segment is connected to the connecting ring and forms a seal. The thickness of the first deformable segment is equal, or the thickness of the first deformable segment increases sequentially in the direction away from the first fixed segment; the thickness of the second deformable segment increases sequentially in the direction away from the first deformable segment. The third deformation segment bends inward toward the interior of the balloon, and the thickness of the third deformation segment decreases sequentially away from the second deformation segment, with the minimum thickness of the third deformation segment being greater than or equal to the maximum thickness of the first deformation segment.

4. The basketball bladder as described in claim 3, characterized in that, The second fixing segment folds back along the central axis of the balloon towards the direction of the first fixing segment, and the outer side of the second fixing segment is bonded to the outer ring surface of the connecting ring.

5. The basketball bladder as described in claim 3, characterized in that, The minimum thickness of the first deformation segment is greater than or equal to 0.2 mm, and the difference between the thickness of the second deformation segment at the end away from the first deformation segment and the thickness of the first deformation segment is 0.1 mm to 0.4 mm; the difference between the thickness of the second deformation segment at the end away from the first deformation segment and the thickness of the third deformation segment at the end away from the second deformation segment is 0.1 mm to 0.4 mm.

6. The basketball bladder as described in claim 3, characterized in that, Before the balloon is inflated, the distance from the third deformed segment to the bottom of the concave segment along the axial direction of the connecting ring is 1mm-2mm; And / or, the lengths of the first fixing segment and the second fixing segment along the axial direction of the connecting ring are 1mm-2mm.

7. The basketball bladder as described in claim 3, characterized in that, The radial distance between the first deformable segment and the central axis of the balloon increases sequentially in the direction away from the first fixed segment; And / or, before the balloon is inflated, the radial dimension of the balloon is smaller than the radial dimension of the concave region.

8. A basket electrode assembly, comprising a basket frame and an electrode body, characterized in that, The basket frame is the basket frame as described in claim 1 or 2, and the electrode body is disposed on the outer side of the planar segment on the basket frame.

9. The basket electrode assembly as described in claim 8, characterized in that, Each of the aforementioned planar segments is provided with a plurality of electrode bodies spaced apart along its length direction; And / or, the basket electrode assembly further includes the basket balloon as described in any one of claims 3-7.

10. A basket guide tube, characterized in that, Includes the basket electrode assembly as described in claim 8 or 9.

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