CN118078396A - Cutting balloon catheter - Google Patents

Abstract

The application relates to a cutting balloon catheter, which belongs to the technical field of medical instruments and comprises a balloon body, a cutting knife and a traction wire, wherein one end of the balloon body is communicated with an external hose; the cutting knife is provided with a plurality of groups of cutting knives, and the cutting knives comprise a plurality of cutting units which are hinged on the peripheral outer wall of the saccule body; the traction wire is a memory wire, the traction wire is provided with a plurality of traction wires, the plurality of traction wires are respectively corresponding to the plurality of groups of cutting knives, the traction wire can penetrate through a plurality of cutting units in the group of cutting knives, one end of the traction wire is connected with one side, far away from the external hose, of the balloon body, the other end of the traction wire is connected with one side, close to the external hose, of the cutting units, and when the balloon body expands, the traction wire can enable the cutting edges of the plurality of cutting units in the group of cutting knives to be continuous straight lines. The application has the effect of improving the vascular passing rate of the cutting saccule.

Description

Cutting balloon catheter

Technical Field

The application relates to the technical field of medical instruments, in particular to a cutting balloon catheter.

Background

Vascular intervention is an important treatment mode for carrying out vascular stenosis blood circulation reconstruction treatment. In vascular interventional therapy, a balloon catheter is generally used as a main vascular interventional therapy instrument, and for some stenotic lesions of blood vessels, such as calcification, plaque, fibrosis and the like, a common balloon catheter cannot dilate a stenotic lesion, and then the stenotic lesion of the blood vessels needs to be dilated by cutting the balloon.

In the related art, the cutting balloon catheter comprises a hose, a balloon body and a cutting knife, and particularly, the balloon body is communicated and connected with one end of the hose; the cutting knife is connected with balloon body week side outer wall to the cutting knife is provided with a plurality ofly, and a plurality of cutting knives are the circumference array distribution as the centre of a circle with the axis of balloon body respectively, when needs are cut the inside pathological change tissue of blood vessel, moves the balloon body to the predetermined position department in the blood vessel earlier, and the hose can be linked together with outside simultaneously, and the balloon body can expand afterwards, so that the cutting knife stretches out and cuts the pathological change tissue in the blood vessel, after the cutting is accomplished, the balloon body can shrink, then takes out the whole follow blood vessel of cutting balloon pipe.

To the above-mentioned related art, there is because of the cutting knife setting as integrated into one piece, so the cutting knife can't buckle the shrink when the cutting sacculus is through the great blood vessel of angle of buckling to lead to cutting knife's blade department to cut the blood vessel, and then lead to the not high defect of passing rate of cutting sacculus pipe.

Disclosure of Invention

In order to improve the vascular passing rate of a cutting balloon catheter, the application provides the cutting balloon catheter.

The application provides a cutting saccule catheter which adopts the following technical scheme:

The cutting balloon catheter comprises a balloon body, a cutting knife and a traction wire, wherein one end of the balloon body is communicated with an external hose; the cutting knife is provided with a plurality of groups of cutting knives, the cutting knife comprises a plurality of cutting units, and the plurality of cutting units are hinged on the peripheral outer wall of the balloon body; the traction wire is a memory wire, the traction wire is provided with a plurality of traction wires, the plurality of traction wires are respectively corresponding to a plurality of groups of cutting knives, the traction wire can penetrate through a plurality of cutting units in the group of cutting knives, one end of the traction wire is connected with one side, far away from an external hose, of the balloon body, the other end of the traction wire is connected with one side, close to the external hose, of the cutting units, and when the balloon body expands, the traction wire can enable the cutting edges of the plurality of cutting units in the group of cutting knives to be continuous straight lines.

Through adopting above-mentioned technical scheme, when needs are cut to the inside pathological change tissue of blood vessel, send into the blood vessel with the sacculus body through the outside hose, when the sacculus body is unexpanded, a plurality of cutting units in a set of cutting knife can be to empty and place, radial diameter when not expanding to reduce the sacculus body, when the sacculus body reaches the pathological change position of blood vessel, the sacculus body can expand, then the haulage line can be straightened in order to make the blade department of a plurality of cutting units in a set of cutting knife be continuous straight line, so that the cutting knife stretches out and cuts the pathological change tissue of blood vessel, compare in the mode that the cutting knife is integrated into one piece, this kind of design mode, when the sacculus body is through the great blood vessel of buckling degree, can further shorten the radial diameter that the cutting sacculus is not expanded, the cutting knife adopts sectional type to possess the compliance more simultaneously, thereby help promoting the holistic trafficability of sacculus pipe, and further help the application scope of sacculus body.

Optionally, the whole cutting unit is divided into a rotating part and a cutting part, the section of the rotating part is triangular, the cutting part is triangular prism-shaped, and one rectangular side surface of the cutting part is connected with the rotating part; the balloon is characterized in that a plurality of fixing shafts are arranged on the outer wall of the circumference of the balloon body, one fixing shaft penetrates through a plurality of cutting units in a group of cutting knives to be close to one side of the balloon body, the fixing shafts are sleeved with rotating parts, the rotating parts are semicircular, the semicircular inner sides of the rotating parts are close to the balloon body, one rotating part penetrates through two rectangular surfaces connected with two cutting units, and the rotating parts on the fixing shafts are distributed at intervals along the length direction of the fixing shafts respectively.

Through adopting above-mentioned technical scheme, because the sacculus is flexible thin wall structure, so it is more difficult to set up hinge structure directly on the sacculus body, this kind of design mode, through the epaxial rotary part of fixed, can make the cutting unit remove along the length direction of rotary part, alright realize cutting unit for the rotation of sacculus body, so when the sacculus body inflation, the haulage line can receive external force and make the haulage line straighten, in order to drive a plurality of cutting units by empting the state and become operating condition, and the blade of a plurality of cutting units can be continuous straight line, then alright realize that the cutting knife is empting the shrink state when the sacculus body is not inflation, thereby can make the holistic structural style of sacculus pipe simpler.

Optionally, a chute is arranged on the peripheral outer wall of the rotating part; the chute extends from the highest point of the rotating part to the lowest point of the rotating part; the inner wall of the position where the rotating part penetrates through the cutting unit is connected with a rotating roller, and the rotating roller is inserted in the sliding groove in a rolling way.

By adopting the technical scheme, due to the arrangement of the sliding chute and the rotating roller, on one hand, the movement of the cutting unit on the rotating part can be changed from sliding to rolling, so that the friction force between the cutting unit and the rotating part can be reduced, and the rotation of the cutting unit can be smoother; on the other hand, the rotating roller moves in a rolling way in the chute, and the position of the rotating roller can be limited through the four side walls of the chute, so that the phenomenon that the actual position of the cutting unit deviates from the preset position when the cutting unit is pulled by the traction wire can be prevented.

Optionally, one end of the traction wire, which is close to the external hose, is provided with a clamping ball, and the maximum cross-sectional area of the clamping ball is larger than the cross-sectional area of the rotation part where the traction wire penetrates.

Through adopting above-mentioned technical scheme, compare in the traction wire with be close to the mode of a side fixed connection of outside hose on a cutting unit of outside hose, this kind of design mode, because of the setting of joint ball, when the sacculus body inflation, the traction wire can be straightened, the biggest cross-sectional area that wears to establish cutting unit with the rotation portion department can be greater than, so the traction wire can become operating condition with a plurality of cutting units from empting the state, also need not go again to set up fixed knot structure with traction wire and cutting unit fixed connection to make sacculus pipe overall structure simpler.

Optionally, a reset groove is arranged on one side surface, close to the external hose, of the two triangular side surfaces of the cutting part; the cutting part further comprises a reset block and a reset spring, the reset block is arranged on one side surface of the cutting part, which is far away from the reset groove, and the reset block is inserted into the reset groove; the reset spring is arranged in the reset groove, one end of the reset spring is connected with the bottom wall of the reset groove, the other end of the reset spring is in butt joint with the reset block, and the reset spring can be compressed when the reset block is inserted into the reset groove.

Through adopting above-mentioned technical scheme, when a plurality of cutting units in a set of cutting knife are a continuous straight line under the effect of traction wire, reset block can insert and establish in reset groove, then the reset spring that is arranged in reset groove can with reset block looks butt and reset spring can be compressed by reset block, after cutting sacculus pipe work is accomplished, the sacculus body can shrink, then the joint ball can be released and cut the connection between the unit, so under reset spring's effect, can make and get into the shrink state by the quick release operating condition between a plurality of cutting units, thereby just realized the purpose that a plurality of cutting units reset fast.

Optionally, a guiding inclined plane is arranged at the edge of the notch of the reset groove, and the reset block can slide into the reset groove from the guiding inclined plane.

Through adopting above-mentioned technical scheme, when the sacculus body is expanded, a plurality of cutting units can get into operating condition from the shrink state under the effect of pull wire, and in this in-process, the piece that resets can slide into the groove that resets through the direction inclined plane to alright make reset more conveniently slide into the groove that resets.

Optionally, the rotating part is provided with a rounded corner near the joint of the two side surfaces of the balloon body.

Through adopting above-mentioned technical scheme, because the sacculus is flexible thin wall structure, so when the sacculus inflation, a plurality of cutting units can rotate, so the rotating part is close to two side junction settings of sacculus body and is the fillet to alright prevent that the cutting unit from being scratched the sacculus body when rotatory, and then help promoting the success rate of cutting blood vessel pathological change position.

Optionally, a magnet is disposed on a side of the rotating portion, which is far from the outer hose, and the magnet is used for adsorbing the rotating portion adjacent to the cutting unit when the plurality of cutting units are stacked.

Through adopting above-mentioned technical scheme, because of the setting of magnet, so when a plurality of cutting units are emptyd the shrink and are placed, the cutting part of one of them cutting unit can with the rotation portion looks butt of adjacent cutting unit, the cutting part of adjacent cutting unit can be adsorbed to magnet on the rotation portion simultaneously to realize the fastening connection when a plurality of cutting units slope shrink are placed, thereby help promoting the stability of a plurality of cutting units when the shrink.

In summary, the present application includes at least one of the following beneficial technical effects:

1. Through the setting mode that the traction wire and the cutting knife comprise a plurality of cutting units, when the pathological tissues in the blood vessel are required to be cut, the balloon body is fed into the blood vessel through an external hose, when the balloon body is not inflated, the plurality of cutting units in the group of cutting knives are arranged in a tilting mode, so that the radial diameter of the balloon body when the balloon body is not inflated is reduced, when the balloon body reaches the pathological positions of the blood vessel, the balloon body is inflated, the traction wire is straightened to enable the cutting edges of the plurality of cutting units in the group of cutting knives to be continuous straight lines, so that the cutting knives extend out to cut the pathological tissues in the blood vessel, compared with the mode that the cutting knives are integrally formed, when the balloon body passes through the blood vessel with larger bending degree, the radial diameter of the cutting balloon which is not inflated can be further shortened, meanwhile, the cutting knife is more flexible in a sectional mode, and therefore the whole passing performance of the balloon catheter is improved, and the application range of the balloon body is facilitated;

2. Due to the arrangement of the sliding groove and the rotating roller, on one hand, the movement of the cutting unit on the rotating part can be changed from sliding to rolling, so that the friction force between the cutting unit and the rotating part can be reduced, and the cutting unit can be rotated more smoothly; on the other hand, the rotating roller rolls in the chute, and the position of the rotating roller can be limited through the four side walls of the chute, so that the phenomenon that the actual position of the cutting unit deviates from the preset position when the cutting unit is pulled by the traction wire can be prevented;

3. Through reset groove, reset piece and reset spring's setting method, when a plurality of cutting units in a set of cutting knife are a continuous straight line under the effect of haulage line blade, reset piece can insert and establish in reset groove, then the reset spring that is arranged in reset groove can with reset piece looks butt and reset spring can be compressed by reset piece, after cutting sacculus pipe work is accomplished, the sacculus body can shrink, then the joint ball can be released with cutting unit between be connected, so under reset spring's effect, can make and can dismantle operating condition entering shrink state fast between a plurality of cutting units, thereby just, realized the purpose that a plurality of cutting units reset fast.

Drawings

Fig. 1 is a schematic view of the structure of the cutting balloon catheter in this embodiment when the balloon body is inflated.

Fig. 2 is a schematic structural view of the balloon body and the cutter in the present embodiment.

Fig. 3 is a sectional view of the cutting unit in the present embodiment.

Reference numerals illustrate: 1. a balloon body; 2. a cutting knife; 21. a cutting unit; 211. a rotating part; 2111. rotating the roller; 212. a cutting section; 2121. a reset groove; 2122. a return spring; 2123. a reset block; 2124. a guide slope; 3. a traction wire; 31. a clamping ball; 4. a fixed shaft; 41. a rotating part; 411. a chute; 5. and (3) a magnet.

Detailed Description

The application is described in further detail below with reference to fig. 1-3.

The embodiment of the application discloses a cutting balloon catheter. Referring to fig. 1 and 2, the cutting balloon catheter includes a balloon body 1, a cutting blade 2, and a traction wire 3, and specifically, the balloon body 1 has a cylindrical shape as a whole in an inflated state; the cutting knife 2 is arranged on the peripheral side outer wall of the balloon body 1, the cutting knife 2 is provided with three groups, the three groups of cutting knives 2 are distributed in a circumferential array by taking the axis of the balloon body 1 as the center of a circle, one group of cutting knives 2 comprises four cutting units 21, the four cutting units 21 are distributed at intervals along the axis direction of the balloon body 1, each cutting unit 21 comprises a rotating part 211 and a cutting part 212, the rotating parts 211 are integrally in a triangular prism shape, the connecting parts of two adjacent rectangular side surfaces of the rotating parts 211 are hinged with the balloon body 1, the connecting parts of the rotating parts 211 close to the two side surfaces of the balloon body 1 are arranged into round corners, the cutting parts 212 are integrally in a regular triangular prism shape, the cutting parts 212 are integrally connected on one side surface of the rotating parts 211, which is far away from the hinging parts of the balloon body 1, and when the four cutting units 21 are in a toppling shrinkage state, the cutting parts 212 of one cutting unit 21 are abutted with the rotating parts 211 of the adjacent cutting unit 21.

Referring to fig. 1 and 2, the traction wire 3 is made of nickel titanium wire, three traction wires 3 are correspondingly arranged according to the number of the cutting knives 2, one end of the traction wire 3 is fixedly connected with one end of the balloon body 1 far away from an external hose through a crown ring, the other end of the traction wire 3 can penetrate through the rotating parts 211 of the four cutting units 21 in the group of the cutting knives 2, a clamping ball 31 is integrally arranged on one side of the traction wire 3 far away from the balloon body 1, and the maximum cross section area of the clamping ball 31 is larger than the cross section area of a through hole opening of the rotating part 211 of the cutting units 21 penetrated by the traction wire 3, so that when the balloon body 1 expands, one traction wire 3 can pull the four cutting units 21, so that the cutting edges of the cutting parts 212 of the four cutting units 21 are in a continuous straight line.

Referring to fig. 1, when it is necessary to cut the pathological tissue inside the blood vessel, the balloon body 1 is first sent into the blood vessel through the external hose, when the pathological portion of the blood vessel is not reached, the four cutting units 21 in the group of cutting knives 2 are placed in a tilting manner, so as to reduce the radial diameter of the balloon body 1 when the balloon body 1 is not inflated, the balloon body 1 is inflated and expanded at the pathological position where the balloon body 1 reaches the blood vessel, the traction wire 3 is in a straight state so that the cutting edges of the four cutting units 21 in the group are in a continuous straight line, so that the cutting knives 2 extend out to cut the pathological tissue inside the blood vessel.

Referring to fig. 2 and 3, the outer wall of the balloon body 1 on the circumference side is provided with a fixed shaft 4, the section of the fixed shaft 4 is circular, the fixed shaft 4 is correspondingly provided with three fixed shafts according to the number of the cutting knives 2, the fixed shaft 4 is extended along the axis direction of the balloon body 1, two ends of the fixed shaft 4 are fixedly arranged on the outer wall of the balloon body 1, the middle part of the fixed shaft 4 passes through one side of four cutting units 21 in a group of the cutting knives 2, which is close to the balloon body 1, the fixed shaft 4 is provided with rotating parts 41 at the sleeving part of the cutting units 21, the four rotating parts 41 are uniformly distributed along the length direction of the fixed shaft 4, and the section of the rotating parts 41 is semicircular when the traction wire 3 drags the four cutting units 21, so that when the cutting units 21 slide to the highest point of the cambered surfaces of the rotating parts 41, the cutting units 21 are in a continuous straight line.

Referring to fig. 2 and 3, a chute 411 is opened on the peripheral side outer wall of the rotating portion 41, the chute 411 is rectangular as viewed from the slot direction, and the chute 411 extends from the highest point of the arc surface of the rotating portion 41 to the lowest point of the arc surface; the inner wall of the cutting unit 21 at the position where the rotating part 41 passes through is provided with a rotating roller 2111, the rotating roller 2111 is inserted in the sliding groove 411 in a rolling way, and meanwhile, the inner wall of the sliding groove 411 can limit the phenomenon that the rotating roller 2111 is deviated, so that the phenomenon that the actual position of the cutting unit 21 is deviated from the preset position when the traction wire 3 pulls the four cutting units 21 can be prevented.

Referring to fig. 2 and 3, a reset groove 2121, a reset block 2123 and a reset spring 2122 are further provided, specifically, the reset groove 2121 is circular when seen from the direction of the notch, the reset groove 2121 is formed in the middle of a side surface of the cutting portion 212 of the cutting unit 21, which is close to the external hose, and a guiding inclined surface 2124 is provided on a side, close to the cutting edge, of the notch edge of the reset groove 2121; the reset block 2123 is cylindrical, the reset block 2123 is made of elastic materials, the reset block 2123 is arranged at the middle position on one side surface of the cutting portion 212 of the cutting unit 21, which is far away from the reset groove 2121, and the reset block 2123 is used for being inserted into the reset groove 2121; the reset spring 2122 is disposed in the reset groove 2121, and one end of the reset spring 2122 is fixedly connected with the bottom wall of the reset groove 2121, and the other end is used for being abutted against the reset block 2123, so that after the work of cutting the balloon catheter is completed, the balloon body 1 is contracted, the traction wire 3 can release the traction action of the cutting unit 21, and the reset block 2123 can be separated from the reset groove 2121 under the action of the reset spring 2122, so that the rapid reset operation of the cutting unit 21 is completed.

Referring to fig. 2 and 3, in addition, in this embodiment, a magnet 5 is further disposed on a side surface of the rotating portion 211 of the cutting units 21 away from the external hose, the magnet is in a cylindrical shape, and when the balloon body 1 is not inflated, the magnet 5 on the rotating portion 211 of one cutting unit 21 will attract the cutting portion 212 of the adjacent cutting unit 21, so as to implement fastening connection of the inclined and contracted placement of the plurality of cutting units 21, thereby helping to promote stability of the plurality of cutting units 21 during contraction.

The implementation principle of the cutting balloon catheter provided by the embodiment of the application is as follows: when the pathological tissue in the blood vessel is required to be cut, the balloon body 1 is sent into the blood vessel through an external hose, when the balloon body 1 is not inflated, the plurality of cutting units 21 in the group of cutting knives 2 are arranged in a tilting mode to reduce the interference of radial dimensions, when the balloon body 1 reaches the pathological position of the blood vessel, the balloon body 1 is inflated, the traction wire 3 is straightened to enable the cutting edges of the plurality of cutting units 21 in the group of cutting knives 2 to be continuous straight lines, so that the cutting of the pathological tissue in the blood vessel is completed.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims (8)

1. A cutting balloon catheter, characterized in that: comprising the following steps:

one end of the balloon body (1) is communicated with an external hose;

the cutting knife (2) is provided with a plurality of groups of cutting knives (2), the cutting knife (2) comprises a plurality of cutting units (21), and the plurality of cutting units (21) are all hinged on the peripheral outer wall of the balloon body (1);

The traction wire (3) is a memory wire, the traction wire (3) is provided with a plurality of traction wires, the plurality of traction wires (3) are respectively corresponding to a plurality of groups of cutting knives (2), the traction wire (3) can penetrate through a plurality of cutting units (21) in a group of cutting knives (2), one end of the traction wire (3) is connected with one side, far away from an external hose, of the balloon body (1), the other end of the traction wire is connected with one side, close to the external hose, of the cutting units (21), and when the balloon body (1) expands, the traction wire (3) can enable a group of cutting knives (2) to form a continuous straight line at the cutting edge of the plurality of cutting units (21).

2. A cutting balloon catheter according to claim 1, wherein: the whole cutting unit (21) is divided into a rotating part (211) and a cutting part (212), the cross section of the rotating part (211) is triangular, the cutting part (212) is triangular prism-shaped, and one rectangular side surface of the cutting part (212) is connected with the rotating part (211); the balloon is characterized in that a plurality of fixing shafts (4) are arranged on the outer wall of the circumference of the balloon body (1), one fixing shaft (4) penetrates through one group of two rectangular surfaces connected with the cutting knife (2), the cutting units (21) in the cutting knife are close to one side of the balloon body (1), the fixing shafts (4) are sleeved with rotating parts (41), the rotating parts (41) are semicircular, the semicircular inner sides of the rotating parts (41) are close to the balloon body (1), one rotating part (41) penetrates through two rectangular surfaces connected with the two cutting units (21), and the rotating parts (41) on the fixing shafts (4) are distributed at intervals along the length direction of the fixing shafts (4) respectively.

3. A cutting balloon catheter as in claim 2, wherein: a chute (411) is arranged on the peripheral outer wall of the rotating part (41); the chute (411) extends from the highest point of the rotating part (41) to the lowest point of the rotating part (41); the inner wall of the cutting unit (21) at the penetrating position of the rotating part (41) is connected with a rotating roller (2111), and the rotating roller (2111) is inserted in the sliding groove (411) in a rolling way.

4. A cutting balloon catheter as in claim 2, wherein: one end of the traction wire (3) close to the external hose is provided with a clamping ball (31), and the maximum cross-sectional area of the clamping ball (31) is larger than the cross-sectional area of the rotation part (211) penetrated by the traction wire (3).

5. A cutting balloon catheter according to claim 3, wherein: a reset groove (2121) is formed in one side surface, close to the outer hose, of the two triangular side surfaces of the cutting part (212); the cutting part (212) further comprises a reset block (2123) and a reset spring (2122), the reset block (2123) is arranged on one side surface of the cutting part (212) away from the reset groove (2121), and the reset block (2123) is inserted into the reset groove (2121); the reset spring (2122) is arranged in the reset groove (2121), one end of the reset spring (2122) is connected with the bottom wall of the reset groove (2121), the other end of the reset spring is abutted against the reset block (2123), and when the reset block (2123) is inserted into the reset groove (2121), the reset spring (2122) can be compressed.

6. A cutting balloon catheter as in claim 5, wherein: a guiding inclined surface (2124) is arranged at the edge of the notch of the reset groove (2121), and the reset block (2123) can slide into the reset groove (2121) from the guiding inclined surface (2124).

7. A cutting balloon catheter as in claim 2, wherein: the joint of the two sides of the rotating part (211) close to the balloon body (1) is provided with a round angle.

8. A cutting balloon catheter as in claim 2, wherein: a magnet (5) is arranged on one side surface, close to and far away from the outer hose, of the rotating part (211), and the magnet (5) is used for adsorbing the rotating part (211) adjacent to the cutting units (21) when a plurality of the cutting units (21) are stacked and placed.