Anchoring balloon catheter

Abstract

The utility model relates to an anchoring balloon catheter. The anchoring balloon catheter comprises a base, a hollow rod, a balloon and a supporting rod, wherein an inner cavity is formed in the base; one end of the hollow rod is connected with the base, the hollow rod is communicated with the inner cavity, and a through hole is formed in the hollow rod; the balloon is connected with one end, far away from the base, of the hollow rod, and the balloon is communicated with the through hole; the supporting rod penetrates through the inner cavity, and one end of the supporting rod extends into the hollow rod. According to the scheme provided by the invention, product failure caused by folding of the hollow rod can be avoided.

Description

Technical Field

[0001] The present application relates to the field of medical device technology, and in particular to an anchored balloon catheter. Background Art

[0002] Microcatheters are often used in percutaneous coronary intervention. Microcatheters can support and assist guidewires to reach the proximal end of the lesion, exchange guidewires, and / or open occluded areas. Clinically, microcatheters are often divided into two types: OTW and RX, and the latter often includes an OTW lumen, that is, a double-lumen microcatheter. After achieving the goal using the guidewire in the OTW lumen, doctors or operators often need to withdraw the catheter and keep the guidewire in place for subsequent balloon follow-up dilatation, FFR / IVUS catheter examination and diagnosis, stent implantation, and even atherectomy. There are at least three methods for leaving the guidewire at the target location in the blood vessel, namely, the extended guidewire technique, the Nanto method, and the balloon anchoring method.

[0003] The extended guidewire technique is to use an additional 145cm or other length of extended guidewire connected to the proximal end of the conventional guidewire to obtain a long guidewire with a total length of more than 300cm, so as to smoothly withdraw the OTW catheter. The process usually requires the cooperation of two people, and the long guidewire is easy to touch the non-sterile surface around the operating table, so it is often not used. The Nanto method is more dependent on the experience and level of the surgeon, and the success rate is not high, so it is also disliked. The balloon anchoring method is to fix the guidewire in the guiding catheter by inserting a balloon dilatation catheter under filling. It is reliable, safe and popular.

[0004] Despite this, the balloon anchoring method is often limited. In the catheterization laboratory, the most commonly used guide catheter is 6F, accounting for about 95% of the total usage. Compared with 7F guide catheters, 6F guide catheters have fewer complications and less intraluminal space. Under the condition of a certain inner diameter of the guide catheter, the use of other interventional microcatheters is limited by the outer diameter. For example, when assisting the withdrawal of the working guidewire after achieving the target, catheters with an outer diameter of 2.8F and 2.9F or above are The balloon cannot enter the 6F guiding catheter to achieve balloon anchoring and withdrawal, which is not conducive to the smooth progress of the operation.

[0005] For this reason, anchored balloon catheters have appeared on the market. Anchored balloon catheters are single-chamber balloon products that do not require rapid chamber exchange. They use a hollow rod directly connected to the anchored balloon catheter to achieve balloon expansion and compress the outer diameter of the anchored balloon catheter to less than 2.0F. However, since the hollow rod is thin, it is easy to fold the hollow rod when the catheter is pushed, resulting in product failure. Utility Model Content

[0006] In order to solve or partially solve the problems existing in the related art, the present application provides an anchoring balloon catheter, which can prevent the hollow rod from being bent and causing product failure.

[0007] The first aspect of the present application provides an anchoring balloon catheter, which includes a base, a hollow rod, a balloon and a support rod, wherein the base is provided with an inner cavity; one end of the hollow rod is connected to the base, the hollow rod is communicated with the inner cavity, and the hollow rod is provided with a perforation; the balloon is connected to one end of the hollow rod away from the base, the balloon is communicated with the perforation; the support rod passes through the inner cavity, and one end of the support rod extends into the hollow rod.

[0008] Furthermore, the support rod is hollow, an infusion channel is provided in the support rod, an end of the support rod away from the base is provided with an opening, and the infusion channel is connected to the opening.

[0009] Furthermore, the support rod is solid.

[0010] Furthermore, the anchoring balloon catheter also includes a developing ring, which is sleeved outside the hollow rod and is located inside the balloon.

[0011] Furthermore, the base includes a catheter seat and a stress relief tube, the catheter seat is connected to one end of the hollow rod, the stress relief tube is connected to the catheter seat, and the stress relief tube is sleeved outside the hollow rod.

[0012] Furthermore, the anchoring balloon catheter also includes a support seat, which is connected to one end of the support rod, and is located outside the base, and is located on a side of the base facing away from the balloon.

[0013] Furthermore, the support seat is columnar, and the central axis of the support seat coincides with or is parallel to the central axis of the support rod.

[0014] Furthermore, the diameter of the balloon is 2.0-2.75 mm.

[0015] Furthermore, the length of the balloon is 8 to 15 mm.

[0016] Furthermore, one end of the support rod is located in the middle of the hollow rod.

[0017] The technical solution provided by the present application may include the following beneficial effects: by arranging a support rod inside the hollow rod, the support rod supports the hollow rod, ensuring that the hollow rod will not be bent and damaged when the hollow rod is pushed in the guide catheter, and the hollow rod can be pushed more smoothly and forcefully in the guide catheter, which is simple for medical staff to operate.

[0018] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other objects, features and advantages of the present application will become more apparent by describing in more detail exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0020] Figure 1 is a schematic structural diagram of an anchoring balloon catheter shown in an embodiment of the present application;

[0021] Figure 2 yes Figure 1 A partial enlarged view of

[0022] Figure 3 It is a schematic diagram of the structure of the hollow rod shown in the embodiment of the present application;

[0023] Figure 4 is a schematic structural diagram of a solid support rod shown in an embodiment of the present application;

[0024] Figure 5 is a schematic structural diagram of a hollow support rod shown in an embodiment of the present application;

[0025] Figure 6 It is a schematic diagram of the structure in which the central axes of the support rod and the support base are staggered according to the embodiment of the present application.

[0026] Figure numerals: base 1; inner cavity 11; catheter seat 12; stress relief tube 13; hollow rod 2; insertion channel 21; perforation 22; balloon 3; support rod 4; infusion channel 41; opening 42; developing ring 5; support seat 6. DETAILED DESCRIPTION

[0027] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0028] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0029] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0030] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, or a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] In view of the above problems, an embodiment of the present application provides an anchoring balloon catheter, which can prevent the hollow rod from being bent and causing product failure.

[0032] The technical solution of the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0033] Figure 1 is a schematic structural diagram of an anchoring balloon catheter shown in an embodiment of the present application; Figure 2 yes Figure 1 A partial enlarged view of .

[0034] See also Figure 1 and Figure 2 The anchoring balloon catheter comprises a base 1, a hollow rod 2, a balloon 3 and a support rod 4. The base 1 is a tubular structure, and an inner cavity 11 is provided in the base 1, and the inner cavity 11 extends along the axial direction of the base 1. The hollow rod 2 is hollow, and an insertion channel 21 is provided in the hollow rod 2, and the insertion channel 21 extends along the axial direction of the hollow rod 2, and the support rod 4 can be inserted into the insertion channel 21.

[0035] Figure 3 It is a schematic diagram of the structure of the hollow rod shown in the embodiment of the present application.

[0036] See also Figure 1-3 One end of the hollow rod 2 is connected to the base 1, and the insertion channel 21 is connected to the inner cavity 11. When physiological saline is injected into the inner cavity 11, the physiological saline can flow from the inner cavity 11 into the insertion channel 21. The hollow rod 2 is provided with a perforation 22, and the physiological saline can flow from the insertion channel 21 through the perforation 22 to the outside of the hollow rod 2. The balloon 3 is connected to the end of the hollow rod 2 away from the base 1, and the balloon 3 is connected to the perforation 22. The physiological saline can enter the balloon 3 from the insertion channel 21 through the perforation 22, and the physiological saline can fill the balloon 3 and expand the balloon 3. The support rod 4 is made of stainless steel or other metal materials. The support rod 4 is inserted into the inner cavity 11 from the outside of the base 1, and the support rod 4 passes through the inner cavity 11, and one end of the support rod 4 extends into the hollow rod 2. The support rod 4 can support the hollow rod 2 and improve the strength of the hollow rod 2. The outer surface of the support rod 4 can be attached to the inner surface of the hollow rod 2, and the outer surface of the support rod 4 can also leave a gap with the inner surface of the hollow rod 2.

[0037] The present application arranges a support rod 4 inside the hollow rod 2 so that the support rod 4 supports the hollow rod 2, thereby ensuring that the hollow rod 2 will not be bent and damaged when the hollow rod 2 is pushed in the guiding catheter. The hollow rod 2 can be pushed more smoothly and powerfully in the guiding catheter, and the operation is simple for medical staff. In addition, the anchoring balloon catheter can be anchored in a 6F guiding catheter, and the maximum allowable interventional catheter diameter is up to 3.2F.

[0038] Figure 4 It is a schematic diagram of the structure of a solid support rod shown in an embodiment of the present application.

[0039] In some embodiments, the support rod 4 is solid, and the solid support rod 4 can greatly improve the strength of the hollow rod 2, secure the hollow rod 2, and make the hollow rod 2 less likely to bend when pushed in the guiding catheter, and push more smoothly. When the balloon 3 needs to be expanded, the support rod 4 can be pulled out of the hollow rod 2, and then physiological saline can be injected into the inner cavity 11, so that the physiological saline can enter the balloon 3 more easily; when the balloon 3 needs to be deflated, the support rod 4 can be pulled out of the hollow rod 2, and then negative pressure can be pumped into the inner cavity 11 to deflate the balloon 3.

[0040] Figure 5 It is a schematic diagram of the structure of the hollow support rod shown in the embodiment of the present application.

[0041] In some embodiments, the support rod 4 is hollow, and an infusion channel 41 is provided in the support rod 4. An opening 42 is provided at one end of the support rod 4 away from the base 1. The infusion channel 41 is connected to the opening 42, and the opening 42 is between the balloon 3 and the base 1. When the balloon 3 needs to be expanded, in addition to injecting physiological saline into the inner cavity 11, physiological saline can also be injected into the support rod 4. The physiological saline flows along the infusion channel 41 to the opening 42, and then enters the hollow rod 2 from the opening 42, and then enters the balloon 3 along the hollow rod 2, thereby expanding the balloon 3. When the balloon 3 needs to be contracted, negative pressure can also be drawn on the end of the support rod 4 away from the opening 42, so that the liquid or gas in the balloon 3 flows along the infusion channel 41 to the outside of the base 1. By designing the support rod 4 to be hollow, it can be avoided that the support rod 4 extends into the hollow rod 2 and affects the patency of the hollow rod 2, which is convenient for the staff to expand or contract the balloon 3.

[0042] See also Figure 1 and Figure 2 The anchoring balloon catheter further includes a developing ring 5, which is sleeved outside the hollow rod 2 and is located inside the balloon 3. The developing ring 5 is made of a radiopaque resin material containing metal, bismuth, barium, etc., or a radiopaque metal material such as platinum, iridium, gold, etc. When the anchoring balloon catheter is inserted into the guiding catheter, the developing ring 5 can be imaged by taking an X-ray of the patient, thereby understanding the position of the anchoring balloon catheter in the patient's body.

[0043] See also Figure 1-3 The base 1 includes a catheter seat 12 and a stress relief tube 13. The catheter seat 12 is made of a harder resin material such as polycarbonate. The catheter seat 12 is connected to one end of the hollow rod 2. The inner cavity 11 is located in the catheter seat 12. The stress relief tube 13 is made of a polyester elastomer material. The stress relief tube 13 is connected to the catheter seat 12 and is sleeved outside the hollow rod 2. The stress relief tube 13 can reduce the stress effect of the hollow rod 2 on the stress of the hollow rod 2 when the hollow rod 2 is pushed in the guiding catheter.

[0044] See also Figure 1 and Figure 2 The anchored balloon catheter also includes a support seat 6, which is connected to one end of the support rod 4, and is located outside the base 1. The support seat 6 is located on the side of the base 1 facing away from the balloon 3. The staff can push the support seat 6, and the support rod 4 moves with the support seat 6, so that the support rod 4 moves toward the balloon 3 in the hollow rod 2; when the staff needs to pull the support rod 4 out of the hollow rod 2, the staff can pull out the support seat 6, so that the support seat 6 drives the support rod 4 to separate from the hollow rod 2. The material of the balloon 3 is Pebax or nylon, etc., the diameter of the balloon 3 is 2.0-2.75mm, and the length of the balloon 3 is 8-15mm.

[0045] Figure 6It is a schematic structural diagram showing that the central axes of the support rod 4 and the support seat 6 are staggered according to an embodiment of the present application.

[0046] See also Figure 4 The support seat 6 is columnar. In some embodiments, the central axis of the support seat 6 coincides with the central axis of the support rod 4. Figure 6 In some embodiments, the central axis of the support seat 6 is staggered from the central axis of the support rod 4, and the central axis of the support seat 6 is parallel to the central axis of the support rod 4. When the support rod 4 is solid, the support seat 6 is provided with a liquid inlet corresponding to the hollow rod 2, and physiological saline can enter the inner cavity through the liquid inlet, and then flow to the balloon 3 through the outside of the support rod 4; when the support rod 4 is hollow, the support seat 6 is connected to the infusion channel 41. After the physiological saline is injected into the support seat 6, the physiological saline enters the infusion channel 41 again, and the physiological saline flows along the infusion channel 41 to the opening 42, and then enters the hollow rod 2 from the opening 42, and then enters the balloon 3 along the hollow rod 2, thereby expanding the balloon 3.

[0047] See also Figure 1 and Figure 2 One end of the support rod 4 is located in the middle of the hollow rod 2. Since most human blood vessels extend in a winding manner, the guiding catheter also has a winding part. In order to ensure that the hollow rod 2 can be pushed along the guiding catheter, one end of the support rod 4 is extended to the middle of the hollow rod 2. This can improve the strength of the hollow rod 2 close to the base 1, and also make the hollow rod 2 far away from the base 1 sufficiently soft, which is convenient for pushing in the guiding catheter.

[0048] The scheme of the present application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of the various embodiments have their own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments. Those skilled in the art should also be aware that the actions and modules involved in the specification are not necessarily required for the present application. In addition, it can be understood that the steps in the method of the embodiment of the present application can be adjusted in order, merged and deleted according to actual needs, and the modules in the device of the embodiment of the present application can be merged, divided and deleted according to actual needs.

[0049] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. An anchoring balloon catheter, characterized in that: include: A base, wherein an inner cavity is provided in the base; A hollow rod, one end of which is connected to the base, the hollow rod is in communication with the inner cavity, and the hollow rod is provided with a through hole; A balloon, the balloon being connected to an end of the hollow rod away from the base, and the balloon being connected to the perforation; A support rod passes through the inner cavity, and one end of the support rod extends into the hollow rod.

2. The anchoring balloon catheter according to claim 1, characterized in that: The support rod is hollow, an infusion channel is provided in the support rod, an opening is provided at one end of the support rod away from the base, and the infusion channel is connected to the opening.

3. The anchoring balloon catheter according to claim 1, characterized in that: The support rod is solid.

4. The anchoring balloon catheter according to claim 1, characterized in that: It also includes a developing ring, which is sleeved outside the hollow rod and is located in the balloon.

5. The anchoring balloon catheter according to claim 1, characterized in that: The base comprises a catheter seat and a stress relief tube, wherein the catheter seat is connected to one end of the hollow rod, the stress relief tube is connected to the catheter seat, and the stress relief tube is sleeved outside the hollow rod.

6. The anchoring balloon catheter according to claim 1, characterized in that: It also includes a support seat, which is connected to one end of the support rod, and is located outside the base, and is located on a side of the base that is away from the balloon.

7. The anchoring balloon catheter according to claim 6, characterized in that: The support seat is columnar, and the central axis of the support seat coincides with or is parallel to the central axis of the support rod.

8. The anchoring balloon catheter according to claim 1, characterized in that: The diameter of the balloon is 2.0-2.75 mm.

9. The anchoring balloon catheter according to claim 1, characterized in that: The length of the balloon is 8 to 15 mm.

10. The anchoring balloon catheter according to claim 1, characterized in that: One end of the support rod is located in the middle of the hollow rod.

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