CN219000471U - Cutting balloon catheter - Google Patents

Abstract

The utility model discloses a cutting balloon catheter, and relates to the technical field of vascular interventional therapy apparatuses. The cutting balloon catheter comprises a balloon and a catheter, the balloon is connected with the catheter, a cutting layer is arranged on the periphery of the balloon, the balloon comprises a wire guide cavity, a liquid medicine cavity and an expansion cavity which are sequentially arranged from inside to outside, a liquid guide tube is further arranged in the expansion cavity, one end of the liquid guide tube arranged in the expansion cavity is communicated with the liquid medicine cavity, and the other end of the liquid guide tube extends to the position of the outer peripheral surface of the balloon and forms a liquid outlet opening on the outer peripheral surface of the balloon. According to the cutting balloon catheter, the balloon is internally provided with the liquid medicine cavity, and the liquid medicine cavity is used for retaining the medicinal liquid, so that the effect of retaining the medicinal liquid is excellent.

Description

Cutting balloon catheter

Technical Field

The utility model relates to the technical field of vascular interventional therapy apparatuses, in particular to a cutting balloon catheter.

Background

Cutting balloon catheters are an interventional procedure developed based on conventional balloon intraluminal angioplasty. Cutting balloon catheters mainly utilize a balloon with a micro-blade to dilate and cut atherosclerotic plaque on the inner wall of a blood vessel, and the cutting balloon can generally achieve satisfactory results for narrow blood vessels such as calcified lesions and fibrotic lesion structures which are not dilated by conventional balloons.

In addition, although good immediate results can be obtained for the treatment of complex lesions with a cutting balloon catheter, vascular damage still causes continued intimal hyperplasia, restenosis, and the combination of cutting balloons and drug balloons is often used in medicine to obtain longer term therapeutic results.

However, the combined use of a cutting balloon and a drug balloon requires two interventional procedures, which can increase the procedure time and increase the risk of the procedure. In order to solve the problem, a cutting balloon capable of carrying medicine is proposed in the prior art, but the medicine can only be coated on the outer surface of the balloon, and when the balloon reaches a lesion position, the medicine is basically dispersed completely, so that the effect of inhibiting intimal hyperplasia is poor.

Disclosure of Invention

The utility model provides a cutting balloon catheter, wherein a liquid medicine cavity is arranged in a balloon of the cutting balloon catheter and is used for retaining medicinal liquid, and the retaining effect is excellent.

The technical scheme for solving the problems is as follows: the utility model provides a cutting sacculus pipe, cutting sacculus pipe includes sacculus and pipe, and the sacculus is connected with the pipe, the sacculus periphery is equipped with the cutting layer, the sacculus includes seal wire chamber, liquid medicine chamber, the expansion chamber that sets gradually from inside to outside, the expansion intracavity still is equipped with the catheter, and the catheter one end intercommunication liquid medicine chamber that sets up in the expansion intracavity, the other end extend to sacculus outer peripheral face department and form out liquid opening on the sacculus outer peripheral face.

Further, the liquid guide tube comprises a liquid guide channel which is communicated with the liquid outlet opening, the liquid guide tube is an elastic tube, and the liquid guide channel of the liquid guide tube is closed in a natural state.

Further, the catheter comprises an inner tube and an outer tube, wherein the inner tube is arranged in the outer tube, the inner tube is communicated with the guide wire cavity, and the outer tube is communicated with the expansion cavity.

Further, the cutting layer is a grid layer formed by interlacing a plurality of cutting wires, and the cutting layer is coated on the outer circumferential surface of the balloon.

Further, the balloon is arranged into a cylinder, the inner end of the balloon is connected with the inner end of the catheter, and the outer end of the balloon is also connected with an intervention tip.

Further, the outer end of the catheter is correspondingly connected with a catheter seat, a wire guide pipe port and an expansion pipe orifice are formed in the catheter seat, the wire guide pipe port is communicated with the inner pipe, and the expansion pipe orifice is communicated with the outer pipe.

Further, the device also comprises identification rings arranged at two ends of the guide wire cavity.

Further, a supporting spacing layer is arranged between the guide wire cavity and the liquid medicine cavity, and an elastic spacing layer is arranged between the expanding cavity and the liquid medicine cavity.

Further, the elastic spacer layer has an initial elastic deformation tension greater than an initial elastic deformation tension of the balloon outer circumferential surface.

The utility model discloses a cutting balloon catheter, which has the following beneficial effects:

first, be equipped with the liquid medicine chamber that can hold the liquid medicine in the cutting sacculus of the device, after the device intervenes in the blood vessel and cutting the sacculus and reach pathological change position department, the operator inflates the inflation sacculus and cuts pathological change structure with the cutting layer of drive control sacculus periphery, and the sacculus inflation still can oppress the liquid medicine chamber simultaneously, forces the medicine liquid in the liquid medicine chamber to flow out to sacculus periphery department to realize its medicine treatment effect.

Second, as long as the cutting saccule is not inflated and expanded, the liquid medicine cavity is in a closed state, and the medicine liquid in the liquid medicine cavity can not flow out, so that the medicine can reach the lesion position in the blood vessel completely.

Third, the catheter in the device is divided into two lumens by the inner tube, so that the inflation lumen and the guide wire intervention lumen are mutually separated, and the air tightness of the inflation lumen is improved.

Fourth, the cutting layer is a grid body, when the cutting layer is coated on the periphery of the balloon, the uneven expansion of the balloon can be restrained, so as to avoid the local expansion of the balloon to destroy the blood vessel,

fifthly, the two ends of the guide wire cavity are provided with the identification rings, so that an operator can accurately detect the position of the balloon in the blood vessel.

Sixth, a supporting spacer layer is arranged between the guide wire cavity and the liquid medicine cavity, and when the inflation of the expansion cavity of the saccule is enlarged, the guide wire cavity can keep unchanged in form under the maintenance of the supporting spacer layer, so that an operator can operate the device conveniently.

Seventh, an elastic spacer layer is arranged between the expansion cavity and the liquid medicine cavity, and the balloon is expanded to a certain extent to press the liquid medicine cavity so as to force the medicine liquid in the liquid medicine cavity to flow out.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description, serve to explain the principles of the utility model. In the drawings, like reference numerals are used to identify like elements. The drawings, which are included in the description, illustrate some, but not all embodiments of the utility model. Other figures can be derived from these figures by one of ordinary skill in the art without undue effort.

Figure 1 is a schematic overall structure of an embodiment of the present utility model,

figure 2 is a cross-sectional view of the overall structure of an embodiment of the utility model,

figure 3 is an enlarged view of a portion of figure 2 at a,

1-balloon, 11-guidewire lumen, 12-medical fluid lumen, 13-expansion lumen, 14-supporting spacer layer, 15-elastic spacer layer, 2-catheter, 21-inner tube, 22-outer tube, 3-cutting layer, 4-catheter, 41-exit opening, 42-catheter channel, 5-insertion tip, 6-catheter hub, 61-guidewire nozzle, 62-expansion nozzle, 7-identification ring.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be arbitrarily combined with each other.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Referring to fig. 1 to 3, a cutting balloon catheter according to an embodiment of the present utility model includes a balloon 1 and a catheter 2, wherein the balloon 1 is connected to an inner end of the catheter 2, and a cutting layer 3 is coated on an outer circumferential surface of the balloon 1. When the balloon 1 is placed in a blood vessel, the balloon 1 is expanded so that the cutting layer 3 on the outer circumferential surface thereof contacts with the lesion on the inner wall of the blood vessel to cut the lesion, thereby improving blood circulation of the blood vessel.

Because the pathological change structure is cut down, the internal vascular membrane that its adhesion can continue to proliferate and lead to the blood vessel to become narrow again, to this, be equipped with liquid medicine chamber 12 in sacculus 1 in this application, liquid medicine chamber 12 communicates sacculus 1 external world through catheter 4. When the medical liquid cavity 12 is filled with the medical liquid, the balloon 1 can carry the medical liquid to move to the lesion position in the blood vessel, and then the medical liquid flows out to the lesion cutting position through the catheter 4 so as to inhibit proliferation.

The method comprises the following steps: the balloon 1 comprises a guide wire cavity 11, a liquid medicine cavity 12 and an expansion cavity 13, wherein the guide wire cavity 11 is positioned at the center of the balloon 1, one end of the guide wire cavity 11 is connected with an insertion tip 5, the other end of the guide wire cavity is independently communicated with an inner tube 21 of the catheter 2, the liquid medicine cavity 12 is arranged at the periphery of the guide wire cavity 11 in a surrounding mode, the expansion cavity 13 is arranged in the liquid medicine cavity 12 in a surrounding mode, and one end of the expansion cavity 13 is connected with an outer tube 22 of the catheter 2. The guide wire extends from the inner tube 21 to the guide wire lumen 11 to facilitate the operation of the balloon 1 by the operator; in addition, the expansion cavity 13 is connected to the outer tube 22 to communicate the annular lumen between the outer tube 22 and the inner tube 21, and the operator can inflate and expand the expansion cavity 13 through the annular lumen, so that the expansion of the expansion cavity 13 enlarges and can enlarge the cutting layer 3, the cutting layer 3 can further contact the vascular lesion structure, the expansion cavity 13 enlarges and can also squeeze the liquid medicine cavity 12, and the liquid medicine in the liquid medicine cavity 12 is forced to flow out along the catheter 4.

As a preferred one of the present embodiment, a plurality of the liquid guide tubes 4 are uniformly distributed in the expansion chamber 13, and each of the liquid guide tubes 4 has an inner end communicating with the liquid medicine chamber 12 and an outer end extending to the outer surface of the balloon 1 and a liquid outlet opening 41 formed on the outer surface of the balloon 1 so that the medicine liquid in the liquid medicine chamber 12 flows out from the liquid outlet opening 41 through the liquid guide tube 4.

The catheter 4 is also an elastic tube, a liquid guiding channel 42 is arranged in the middle of the catheter 4, and the liquid guiding channel 42 is communicated with the liquid outlet opening 41. In the normal state of the catheter 4, the liquid guide channel 42 is closed under the action of elasticity, and the medicine liquid cannot flow out from the liquid outlet opening 41 along the liquid guide channel 42; only when the expansion chamber 13 is inflated and expanded, the expansion chamber 13 is enlarged to press the liquid medicine chamber 12, and the liquid medicine chamber 12 is pressed with an internal pressure being increased to open the liquid guide passage 42 so that the liquid medicine can smoothly flow out of the liquid medicine chamber 12 to reach the lesion position.

In addition, the catheter 2 includes an outer tube 22 and an inner tube 21, the inner tube 21 is provided in the outer tube 22, the inner tube 21 is separately communicated with the guidewire lumen 11, and an annular lumen between the outer tube 22 and the inner tube 21 is communicated with the expansion lumen 13 to ensure the air tightness of the expansion lumen 13.

As a second preferred item of the embodiment, the cutting layer 3 is a grid layer formed by connecting a plurality of cutting wires in a staggered way, the shape of the cutting layer 3 is the same as that of the balloon 1, and the cutting layer 3 is wrapped and sleeved on the balloon 1. The meshed cutting layer 3 can be used for inhibiting the uneven expansion of the balloon 1, so that the pressure of the balloon 1 on the inner wall of the blood vessel is prevented from being unbalanced, and dangers are generated.

In addition, both ends of the cutting layer 3 are respectively convergent onto the insertion tip 5 and the catheter 2 to prevent the axial displacement of the cutting layer 3 on the balloon 1.

If necessary, the technician may also set a fixed welded collar on the inner end of the catheter 2 and fixedly connect the converging end of the cutting layer 3 with the welded collar to further limit the axial displacement of the cutting layer 3.

As a third preferred aspect of the present embodiment, the outer end of the catheter 2 is provided with a catheter seat 6, two nozzles are provided on the catheter seat 6, wherein the nozzle communicated with the inner cavity of the inner tube 21 is a wire nozzle 61, the nozzle communicated with the annular lumen between the inner tube 21 and the outer tube 22 is an expansion nozzle 62, a technician can inflate the expansion cavity 13 through the expansion nozzle 62, the expansion nozzle 62 and the wire nozzle 61 are independent from each other, and the wire nozzle 61 is not sealed in the inflation expansion cavity 13.

As a fourth preferred option of the present embodiment, in order to prevent the drug liquid from flowing out in advance along the catheter 4, the initial elastic deformation tension of the outer surface of the balloon 1 is smaller than the initial elastic deformation tension of the elastic spacer layer 15 spaced between the drug solution chamber 12 and the expansion chamber 13, except that the catheter 4 is an elastic tube so that the catheter 4 is closed with its catheter passage 42 in a normal state, to ensure that the drug liquid does not flow out from the drug solution chamber 12 at the initial stage of the expansion of the balloon 1. When the balloon 1 is expanded to the periphery of the cutting layer 3 and the lesion structure is cut, the subsequent elastic deformation of the balloon 1 can occur at the elastic spacing layer 15, so that the shape of the liquid medicine cavity 12 is reduced, and the medicine liquid flows out of the balloon 1 from the liquid catheter 4, so that the medicine liquid can be fully applied to inhibiting hyperplasia, and the medicine waste is reduced.

As a supplementary preference of the present embodiment, the spacer layer between the guide wire lumen 11 and the medical solution lumen 12 is provided as a supporting spacer layer 14, and the supporting spacer layer 14 is used for maintaining the shape of the guide wire lumen 11 unchanged so as to ensure the smoothness of the guide wire lumen 11.

In addition, the two ends of the guide wire cavity 11 are also provided with the identification rings 7, and the identification rings 7 can be used for detection and identification of detection equipment such as B ultrasonic, X-ray and CT, so that operators can judge the position of the balloon 1.

In addition, a point needs to be described: in the present embodiment, the expansion mode of the expansion chamber 13 may be an inflation mode such as a liquid filling mode.

The above is applicable to the prior art, where nothing is mentioned.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting. Although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (9)

1. The utility model provides a cutting sacculus pipe, cutting sacculus pipe includes sacculus (1) and pipe (2), and sacculus (1) is connected with pipe (2), sacculus (1) periphery is equipped with cutting layer (3), a serial communication port, sacculus (1) are including wire guide chamber (11), liquid medicine chamber (12), expansion chamber (13) that set gradually from inside to outside, still be equipped with catheter (4) in expansion chamber (13), and catheter (4) one end intercommunication liquid medicine chamber (12) that set up in expansion chamber (13), the other end extend to sacculus (1) outer peripheral face department and form liquid outlet opening (41) on sacculus (1) outer peripheral face.

2. A cutting balloon catheter according to claim 1, characterized in that the catheter (4) comprises a liquid guiding channel (42), the liquid guiding channel (42) is communicated with the liquid outlet opening (41), the catheter (4) is an elastic tube, and the liquid guiding channel (42) of the catheter (4) is in a closed state in a natural state.

3. A cutting balloon catheter as claimed in claim 1, characterized in that the catheter (2) comprises an inner tube (21) and an outer tube (22), the inner tube (21) being arranged in the outer tube (22), and the inner tube (21) being in communication with the guidewire lumen (11), the outer tube (22) being in communication with the expansion lumen (13).

4. A cutting balloon catheter according to claim 1, wherein the cutting layer (3) is a mesh layer formed by interlacing a plurality of cutting wires, and the cutting layer (3) is wrapped around the outer circumferential surface of the balloon (1).

5. A cutting balloon catheter as claimed in claim 1, characterized in that the balloon (1) is provided as a cylinder, the inner end of the balloon (1) being connected to the inner end of the catheter (2), the outer end of the balloon (1) being further connected with an insertion tip (5).

6. A cutting balloon catheter as claimed in claim 5, wherein the catheter (2) is correspondingly connected with a catheter seat (6) at the outer end thereof, a wire guide tube port (61) and an expansion tube port (62) are arranged on the catheter seat (6), the wire guide tube port (61) is communicated with the inner tube (21), and the expansion tube port (62) is communicated with the outer tube (22).

7. A cutting balloon catheter as claimed in claim 1, further comprising identification rings (7) provided at both ends of the guidewire lumen (11).

8. A cutting balloon catheter as claimed in claim 1, characterized in that a supporting spacer layer (14) is arranged between the guide wire lumen (11) and the medical fluid lumen (12), and an elastic spacer layer (15) is arranged between the expansion lumen (13) and the medical fluid lumen (12).

9. A cutting balloon catheter as claimed in claim 8, characterized in that the elastic spacer layer (15) has an initial elastic deformation tension greater than the initial elastic deformation tension of the outer circumferential surface of the balloon (1).

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