CN114917016A - Catheter adjustment handle and ablation system - Google Patents

Abstract

The invention discloses a catheter adjusting handle which comprises a handle body, wherein a cavity is formed in the handle body, a catheter insertion opening for inserting an ablation catheter is formed in the far end of the handle body, a penetrating opening for penetrating an inner tube of the ablation catheter out is formed in the handle body, a diameter adjusting mechanism is arranged on the handle body, and the diameter adjusting mechanism pushes the inner tube or the outer tube of the ablation catheter to move axially so as to adjust the diameter of a basket at the far end of the ablation catheter. The invention also discloses an ablation system. Compared with the prior art, the diameter adjusting mechanism is arranged on the handle body to axially push the outer tube or the inner tube of the ablation catheter, so that the diameter of the basket of the ablation catheter is changed, the basket is prevented from being deformed unexpectedly after receiving external force, and the risk of electric arc or short circuit caused by excessive approach of two adjacent electrode arms of the basket due to deformation is prevented; and meanwhile, the diameter adjusting mechanism is arranged to realize one-hand operation, so that the multi-person cooperation operation is not needed.

Description

Catheter adjusting handle and ablation system

Technical Field

The invention relates to a medical instrument, in particular to a catheter adjusting handle and an ablation system.

Background

Atrial fibrillation is a rapid arrhythmia, and the incidence of atrial fibrillation increases with age, reaching up to 10% in people over 75 years of age. In atrial fibrillation, the exciting frequency of an atrium reaches 300-600 times per minute, the heartbeat frequency is often fast and irregular and sometimes reaches 100-160 times per minute, the heartbeat is much faster than that of a normal person and is absolutely irregular, and the atrium loses the effective contraction function. The incidence of atrial fibrillation is also closely related to coronary heart disease, hypertension, heart failure and other diseases.

The number of procedures for atrial fibrillation treatment by catheter ablation has increased significantly in recent years. Catheter ablation refers to the insertion of an elongated ablation catheter into the heart chamber through the femoral vein and further into the left atrium after the atrial septal puncture is made. Within the left atrium, the operator can deliver energy through the electrodes at the tip of the catheter to ablate or isolate (even if not in communication with other myocardium) the tissue in the myocardium that contributes to atrial fibrillation.

In the atrial fibrillation treatment operation, an operator inserts an ablation catheter into the left atrium along the atrial septum to ablate the cardiac muscle around the pulmonary vein. The traditional operation adopts a single-electrode ablation catheter to perform point-to-point ablation, and the ablation mode has low efficiency and long time consumption. In response to this problem, some enterprises have developed a basket-shaped multi-arm multi-electrode ablation catheter to achieve one-time ablation (one shot) of pulmonary veins. These arms are typically supported by a single memory alloy wire/plate, which is easily deformed to be received in the sheath, and also easily deformed by external forces. In particular, when two adjacent electrode arms are excessively close due to an external force, the electrode spacing on the electrode arms also becomes excessively small, thereby causing a risk of arcing and even short-circuiting.

Disclosure of Invention

The invention aims to provide a catheter adjusting handle and an ablation system, and aims to solve the technical problem that a basket-shaped ablation catheter is easy to deform in a heart cavity under external force and improve the operation safety.

In order to solve the problems, the invention adopts the following technical scheme: the utility model provides a catheter adjustment handle, includes the handle body, its characterized in that: the ablation catheter comprises a handle body, wherein a cavity is formed in the handle body, a catheter insertion opening for inserting an ablation catheter is formed in the far end of the handle body, so that the ablation catheter is fixed in the handle body, a penetration opening for allowing an inner tube of the ablation catheter to penetrate out is formed in the handle body, and a diameter adjusting mechanism is arranged on the handle body and pushes the inner tube or the outer tube of the ablation catheter to axially move so as to adjust the diameter of a basket at the far end of the ablation catheter.

Further, the diameter adjusting mechanism comprises a first sliding part and a first limiting part, a first sliding groove is formed in the outer wall of the handle body and is axially arranged along the handle body, the first limiting part is arranged in the cavity of the handle body, a connecting part of the first sliding part penetrates through the first sliding groove and then extends into the cavity of the handle body and is fixedly connected with the first limiting part, a fixed through groove used for fixing the outer pipe or the inner pipe of the ablation catheter is formed in the first limiting part, the outer pipe or the inner pipe of the ablation catheter penetrates through the fixed through groove and is fixed with the fixed through groove, and the outer pipe or the inner pipe of the ablation catheter is driven to axially move by pushing the first sliding part to drive the first limiting part to drive the outer pipe or the inner pipe of the ablation catheter.

Furthermore, the diameter adjusting mechanism further comprises a second limiting part, the second limiting part is fixed in the cavity of the handle body, a second sliding groove is formed in the second limiting part and is arranged along the axial direction of the handle body, and the first limiting part is arranged in the second sliding groove and can move back and forth in the second sliding groove so as to guide the first limiting part.

Furthermore, a pressing plate is arranged on one side, located in the fixed through groove, of the first limiting part, a pressing cover is arranged on the pressing plate, the pressing cover is n-shaped, a through groove is formed in the pressing cover, the pressing cover is covered on the first limiting part through the through groove and presses the pressing plate on the first limiting part, two ends of the pressing cover are fixed on the second limiting part, an adjusting screw which cannot be disengaged is arranged on the pressing plate, an adjusting screw hole is formed in the pressing cover, and the adjusting screw is in threaded connection with the adjusting screw hole, so that when the adjusting screw is screwed, the pressing plate can move along the axial direction of the adjusting screw hole.

Furthermore, a fixing seat is arranged in the cavity of the handle body and fixed in the handle body, a fixing seat cavity is arranged in the fixing seat, a first fixing seat through hole communicated with the fixing seat cavity is formed in one end, opposite to the catheter insertion hole, of the fixing seat, so that the outer tube of the ablation catheter is fixed in the first fixing seat through hole, a second fixing seat through hole communicated with the fixing seat cavity is formed in the end face of the near end of the fixing seat, so that the inner tube of the ablation catheter can penetrate through the fixing seat, and a hemostatic valve is arranged on one side, located in the second fixing seat through hole, of the fixing seat cavity.

Furthermore, a tubular side arm is further arranged on the fixed seat, the side arm extends out of the handle body from a hole in the handle body, and a three-way valve is connected to the side arm.

Furthermore, the handle body is also provided with a bending adjusting mechanism, the bending adjusting mechanism comprises a rotary adjusting piece and a second sliding piece, the rotary adjusting piece is rotatably fixed in the cavity of the handle body, a rotating window is arranged on the outer wall of the handle body and positioned at the position of the rotating adjusting piece to expose part of the rotating adjusting piece, the outer wall of the second sliding piece is provided with threads, an adjusting piece through hole for the second sliding piece to pass through is arranged in the rotating adjusting piece, the adjusting piece through hole is a threaded hole to realize threaded connection with the second sliding piece, a second guide part is arranged in the cavity of the handle body, a guide sliding groove is axially arranged on the second sliding part, the second guide part is arranged in the guide sliding groove, the second sliding part is driven to move axially when the rotating adjusting part is rotated in the rotating window, so that two pull wires of the ablation catheter are pulled, and the bending degree of the far end of the ablation catheter is adjusted.

Furthermore, a first guide piece is arranged in the cavity of the handle body, one end of the first guide piece is connected with the penetrating port, a first guide piece through hole is formed in the first guide piece, and the first guide piece through hole is communicated with the penetrating port, so that the inner pipe extends out of the handle body from the penetrating port through the first guide piece through hole.

Furthermore, a lead leading-out opening is further formed in the handle body, so that an electrode lead of the ablation catheter is electrically connected with the electric appliance connector after being led out from the lead leading-out opening.

The invention also discloses an ablation system, which comprises an ablation catheter and the catheter adjusting handle, wherein the ablation catheter comprises an outer tube, an inner tube and two pull wires, the inner tube and the two pull wires are coaxially arranged, the inner tube is arranged in the outer tube and can move axially relative to the outer tube, a through cavity is formed between the inner tube and the outer tube, the outer tube is fixed in a cavity of the handle body, and the inner tube is driven by the diameter adjusting mechanism to axially move in the outer tube, so that the diameter of a basket arranged at the far end of the ablation catheter is adjusted.

Compared with the prior art, the diameter adjusting mechanism is arranged on the handle body to axially push the outer tube or the inner tube of the ablation catheter, so that the diameter of the basket of the ablation catheter is changed, the basket is prevented from being deformed unexpectedly after receiving an external force, and the risk of electric arc or short circuit caused by excessive approach of two adjacent electrode arms of the basket due to deformation is prevented; and meanwhile, the diameter adjusting mechanism is arranged, so that the single-hand operation can be realized, and the multi-person cooperation operation is not needed.

Drawings

FIG. 1 is a schematic view of the external structure of the catheter adjustment handle of the present invention.

Fig. 2 is a schematic view of the internal structure of the catheter adjustment handle of the present invention.

Fig. 3 is a sectional view taken in the direction of a-a in fig. 2.

Fig. 4 is a schematic view of the internal three-dimensional structure of the catheter adjustment handle of the present invention.

Fig. 5 is a schematic view of the internal three-dimensional structure of the catheter adjustment handle of the present invention.

Fig. 6 is a schematic view of the internal structure of the handle body of the present invention.

Fig. 7 is a schematic structural diagram of the first sliding member and the first position limiting member according to the present invention.

Fig. 8 is a schematic view of the internal structure of the fixing base of the present invention.

FIG. 9 is a schematic view of the external structure of the catheter adjustment handle of the present invention with a bend adjustment mechanism.

FIG. 10 is a schematic view of the internal structure of the catheter adjustment handle of the present invention with a bend adjustment mechanism.

Fig. 11 is a schematic structural view between the second slider and the handle body of the present invention.

Fig. 12 is a schematic view of the gland of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples.

In the present invention, distal end refers to the end remote from the operator; proximal refers to the end near the operator.

As shown in fig. 1 and 2, the invention discloses a catheter adjusting handle, which comprises a handle body 1, wherein the handle body 1 is of a cylindrical structure, a cavity is arranged in the handle body 1, a catheter insertion opening 2 for inserting an ablation catheter is arranged at the far end of the handle body 1 so as to fix the ablation catheter in the handle body 1, a penetration opening 3 for penetrating out an inner tube of the ablation catheter is arranged on the handle body 1, a diameter adjusting mechanism 4 is arranged on the handle body 1, and the diameter adjusting mechanism 4 pushes the inner tube or the outer tube of the ablation catheter to move axially so as to adjust the diameter of a basket at the far end of the ablation catheter.

As shown in fig. 2, 3, 6 and 7, the diameter adjusting mechanism 4 includes a first sliding member 41 and a first limiting member 42, a first sliding groove 11 is arranged on the outer wall of the handle body 1, the first sliding groove 11 penetrates through the outer wall of the handle body 1, the first sliding groove 11 extends along the axial direction of the handle body 1, a first limiting piece 42 is arranged in the cavity of the handle body 1, the connecting portion of the first sliding member 41 passes through the first sliding slot 11 and then extends into the cavity of the handle body 1 and is fixedly connected with the first limiting member 42, in the present invention the thickness of the connecting portion on the first sliding member 41 is adapted to the width of the groove body of the first sliding groove 11, a fixing through groove 421 for fixing an outer tube or an inner tube of the ablation catheter is arranged on the first limiting member 42, after the outer tube or the inner tube of the ablation catheter passes through and is fixed to the fixing through groove 421, the first sliding part 41 is pushed to drive the first limiting part 42 to drive the outer tube or the inner tube of the ablation catheter to move axially.

The fixing through-groove 421 is not limited to a through-groove in the present invention, and may be a through-hole provided in the first limiting member 42 instead.

As shown in fig. 3 and 7, an insertion groove 427 is provided at an end of the first limiting member 42 opposite to the first sliding member 41, so that the first sliding member 41 is tightly inserted into the insertion groove 427 of the first limiting member 42 after passing through the first sliding slot 11, of course, the insertion groove 427 may be a through slot 421 passing through the first limiting member 42, so that the insertion groove 427 is communicated with the fixed through slot 421, so as to press the tube body of the outer tube or the inner tube of the ablation catheter located in the fixed through slot 421 through the connecting portion on the first sliding member 41, thereby fixing the outer tube or the inner tube of the ablation catheter with the first limiting member 42.

As shown in fig. 2, 3, 6 and 7, the diameter adjusting mechanism 4 further includes a second limiting member 43, the second limiting member 43 is fixed in the cavity of the handle body 1, a second sliding slot 431 is disposed on the second limiting member 43 along the axial direction of the handle body 1, and the first limiting member 42 is disposed in the second sliding slot 431 and can move back and forth in the second sliding slot 431 to guide the first limiting member 42; the width of the first limiting member 42 is adapted to the width of the second sliding groove 431, so that the first limiting member 42 can move back and forth in the second sliding groove 431.

As shown in fig. 6 and 7, the second limiting member 43 is formed by a protrusion provided on a wall of the cavity on one side of the first sliding groove 11 in the cavity of the handle body 1, and the first sliding groove 11 is provided in the second sliding groove 431 and communicates with the second sliding groove 431.

As shown in fig. 2, 3, 4 and 5, the fixing of the first limiting member 42 to the outer tube or the inner tube of the ablation catheter can be realized by a structure that a pressing plate 422 is disposed on one side of the first limiting member 42 located at the fixing through groove 421, a pressing cover 424 is disposed on the pressing plate 422, the pressing cover 424 is n-shaped and includes two support arms 4241 and a connecting plate 4242, a through groove 426 (shown in fig. 12) is formed between the support arm 4241 and the connecting plate 4242, the pressing cover 424 covers the first limiting member 42 through the through groove 426 and presses the pressing plate 422 onto the first limiting member 42, the two support arms 4241 of the pressing cover 424 are fixed on the second limiting member 43, an adjusting screw 423 capable of rotating but not releasing is disposed on the pressing plate 422, the end of the screw rod of the adjusting screw 423 is rotatably fixed on the pressing plate 422, that the screw rod of the adjusting screw 423 is rotatably engaged with the pressing plate 422, so as to realize that the adjusting screw 423 can rotate but not release, an adjusting screw hole 425 for passing the adjusting screw 423, the adjusting screw hole 425 and the through groove 426 are formed on the link plate 4242, and after the gland 424 is covered on the first limiting member 42, the adjusting screw 423 is in threaded connection with the adjusting screw hole 425 to limit the pressure plate 422 in the gland 424 to be movable in the axial direction of the adjusting screw hole 425.

After the pressing cover 424 is covered on the first limiting member 42, the distance between the connecting plate 4242 and the first limiting member 42 is greater than the thickness of the pressing plate 422, so that the pressing force between the pressing plate 422 and the first limiting member 42 is adjusted, the resistance of the first sliding member 41 is adjusted, the resistance is greater than the deformation force of the basket, and the basket deformation is limited.

As shown in fig. 7 and 12, a pressing plate limiting groove 4243 adapted to the pressing plate 422 is provided at an end of the link plate 4242 opposite to the pressing plate 422 to prevent the pressing plate 422 from being rotated during the rotation of the adjusting screw 423.

As shown in fig. 3 and 6, fixing posts 432 may be further disposed on the two side groove edges of the second limiting member 43, and fixing post holes 426 adapted to the fixing posts 432 are respectively disposed on the support arms 4241 of the pressing cover 424, so as to relatively fix the pressing cover 424.

As shown in fig. 1, a prompt scale 13 is disposed on the outer wall of the handle body 1 at a position of the first sliding slot 11 to display a corresponding diameter of the basket of the ablation catheter, and the prompt scale 13 may be distributed as shown in fig. 1, when the first sliding member 41 is located at a middle position of the first sliding slot 11, the basket 104 is in an initial state corresponding to a middle value of the variable diameter, when the first sliding member 41 is slid toward the distal end of the handle body 1, the diameter of the basket 104 gradually decreases, and when the first sliding member 41 is slid toward the proximal end of the handle body 1, the diameter of the basket 104 gradually increases, thereby realizing diameter adjustment of the basket.

As shown in fig. 1 and 2, the insertion port 3 is provided at a position of the handle body 1 near the diameter adjusting mechanism, and the catheter insertion port 2 is provided coaxially with the handle body 1.

As shown in fig. 2, an arc-shaped first guide 5 is arranged in the cavity of the handle body 1, one end of the first guide 5 is connected with the outlet 3, a first guide through hole 51 is arranged in the first guide 5, and the first guide through hole 51 is communicated with the outlet 3; the first guide member 5 is provided for guiding the inner tube 102 of the ablation catheter, preventing the inner tube 102 from being folded in half during the pushing and pulling process. The other end of the first guide member 5 can extend to be opposite to the fixed through slot 421, so as to reduce the exposed part of the inner tube 102 between the inner tube and the distal end of the first guide member 5 after passing through the first sliding member 41, thereby avoiding the problems of the double folding of the tube body of the inner tube 102 and the entanglement with the electrode lead 108 of the ablation catheter.

As shown in fig. 2, a lead wire outlet 6 is further provided on the handle body 1, so that an electrode lead wire of the ablation catheter is electrically connected with the electrical connector 109 after being led out from the lead wire outlet 6; the lead outlet 6 is provided on the proximal end surface of the handle body 1.

As shown in fig. 2 and 8, a fixing seat 7 is disposed in the cavity of the handle body 1, the fixing seat 7 is fixed in the handle body 1, a fixing seat cavity 71 is disposed in the fixing seat 7, a first fixing seat through hole 72 communicated with the fixing seat cavity 71 is disposed at an end of the fixing seat 7 opposite to the catheter insertion port 2, so as to fix the outer tube of the ablation catheter in the first fixing seat through hole 72, a second fixing seat through hole 73 communicated with the fixing seat cavity 71 is disposed on a proximal end face of the fixing seat 7, so that the inner tube of the ablation catheter passes through the fixing seat 7, and a hemostatic valve 74 is disposed at one side of the fixing seat cavity 71 located at the second fixing seat through hole 72, so as to block the liquid from overflowing.

Because the existing ablation catheter 100 can also be used for liquid perfusion, a tubular side arm 75 is further arranged on the fixed seat 7, the side arm 75 extends out of the handle body 1 from a hole on the handle body 1, a three-way valve 76 is connected to the side arm 75, and the side arm 75 is communicated with the cavity 71 of the fixed seat.

As shown in fig. 9 and 10, on the basis of the above structure, the handle body 1 is further provided with a bending adjusting mechanism 8, the bending adjusting mechanism 8 can be disposed at the proximal end of the diameter adjusting mechanism, the bending adjusting mechanism 8 includes a rotating adjusting member 81, a second sliding member 82, and a pulley 83, the rotating adjusting member 81 and the second sliding member 82 are all cylindrical, the rotating adjusting member 81 is rotatably fixed in the cavity of the handle body 1, a rotating window 12 is opened on the outer wall of the handle body 1 at the position of the rotating adjusting member 81 to expose a portion of the rotating adjusting member 81, the outer wall of the second sliding member 82 is provided with a thread, an adjusting member through hole 811 for the second sliding member 82 to pass through is provided in the rotating adjusting member 81, the adjusting member through hole 811 is a threaded hole to achieve threaded connection with the second sliding member 82, the pulley 83 is fixed on the cavity wall of the handle body 1 at the proximal end of the second sliding member 82 through a rotating shaft, one of the pull wires of the ablation catheter is fixed on the second slide member 82 after passing through the proximal end of the pulley 83, and the other pull wire is directly fixed on the second slide member 82; when the rotating adjusting piece 81 is rotated in the rotating window 12, the second sliding piece 82 is driven to move axially, so that two pull wires of the ablation catheter are pulled, and the curvature of the distal end of the ablation catheter is adjusted.

As shown in fig. 11, the rotation adjusting member 81 may be fixed by providing a circumferential annular groove 14 on the cavity wall of the handle body 1, the rotation adjusting member 81 is adapted to the annular groove 14 to limit the rotation adjusting member 81 to axially rotate in the annular groove 14, the outer diameter of the rotation adjusting member 81 is larger than the cavity diameter of the handle body 1, the second sliding member 82 is provided with a guide chute 821, the guide chute 821 extends along the axial direction of the second sliding member 82, and the cavity wall of the handle body 1 is provided with a second guide member 15 adapted to the guide chute 821 to limit the second sliding member 82 to only axially move and not rotate, and simultaneously limit the axial movement range of the second sliding member 82 to prevent the catheter from being excessively bent.

As shown in fig. 11, the second guiding element 15 is a convex pillar disposed on the cavity wall of the handle body 1, two guiding sliding slots 821 are disposed, and are symmetrically disposed on two opposite sides of the second sliding element 82, respectively, and the second guiding element 15 is also disposed in the two guiding sliding slots 821 correspondingly.

As shown in fig. 11, a second slider through hole 822 is provided in the second slider 82 along the axial direction of the second slider 82, and the second slider through hole 822 is through which the pull cord and the electrode lead 108 pass.

As shown in fig. 1, 2, 3, 4 and 8, the present invention further discloses an ablation system, which includes an ablation catheter 100, the ablation catheter 100 includes an outer tube 101, an inner tube 102 and two pull wires 103, which are coaxially disposed, a basket 104 is further disposed at a distal end of the ablation catheter 100, the basket 104 is generally connected to the outer tube 101 and the inner tube 102, a distal end of the basket 104 is fixedly connected to a distal end of the inner tube 102, a proximal end of the basket 104 is fixedly connected to a distal end of the outer tube 101, which is a conventional fixing manner, which is not specifically described herein, wherein the inner tube 102 is disposed in the outer tube 101 and can move axially relative to the outer tube 101, a lumen of the inner tube 102 can be connected to a guide wire, a lumen 105 is disposed between the inner tube 102 and the outer tube 101 for injecting a liquid, and a catheter adjustment handle is disposed at a proximal end of the ablation catheter 100.

In the invention, the outer tube 101 of the ablation catheter 100 is fixed and can not move axially, and the outer tube 102 moves axially through the diameter adjusting mechanism, so that the diameter of the basket 104 can be adjusted.

The ablation system of the present invention may have several combinations of the following:

as shown in fig. 4, when only the diameter adjusting mechanism is disposed in the catheter adjusting handle, the proximal end of the ablation catheter 100 is inserted into the handle body 1 from the catheter insertion opening 2, the proximal end of the outer tube 101 is fixed in the cavity of the handle body 1, the proximal end of the inner tube 102 passes through the fixing through groove 421 and then extends out of the handle body 1 from the through opening 3, and the electrode wire 108 of the ablation catheter is led out from the wire leading-out opening 6 and then electrically connected to the electrical connector 109, so as to complete electrical signal transmission after being connected to the connector at the device end, and implement functions of ablation, mapping, and the like.

When the first guide member 5 is further disposed in the handle body 1, as shown in fig. 4, the proximal end of the inner tube 102 passes through the first limiting member 42 and then extends out of the handle body 1 from the through hole 3 through the first guide member through hole 51 of the first guide member 5, so that when the first guide member 5 drives the inner tube 102 to move axially, the inner tube 102 can move more smoothly.

When the fixing seat 7 and the side arm 75 are further provided, as shown in fig. 8, the proximal end of the outer tube 101 is inserted into the cavity of the handle body 1 through the catheter insertion port 2 and then fixed in the first fixing seat through hole 72, the inner tube 102 sequentially passes through the fixing seat 7, the fixing through groove 421 and the first guide through hole 51 and then extends out of the handle body 1 from the outlet 3, and a luer connector may be provided on the proximal end of the inner tube 102. The inner tube 102 also passes through the hemostasis valve 74 when passing through the second anchor seat through hole 73 in the anchor seat 7.

Since there is a lumen between the outer tube 101 and the inner tube 102, the lumen communicates with the holder cavity 71 after the back of the outer tube 101 is secured in the first holder through hole 72, and can be passed out of the distal end of the ablation catheter 100 through the lumen after fluid is delivered from the side arm 75.

As shown in fig. 8, the outer tube 101 of the present invention may be formed of two tube walls, but may have only one tube wall, and when formed of two tube walls, the proximal end of the inner tube wall of the outer tube 101 extends from the proximal end of the outer tube wall of the outer tube 101, and the first holder through hole 72 is provided as a stepped hole, thereby fixing the tube walls of both sides of the outer tube 101.

As shown in fig. 9 and 10, when the catheter adjusting handle is further provided with the bending adjusting mechanism 8, one of the two pulling wires 103 on the inner tube 102 is longer than the other pulling wire, which are named as a long pulling wire 106 and a short pulling wire 107 for easy understanding, the long pulling wire is connected to the proximal end of the second sliding member 82 after passing through the proximal end of the pulley 83, the short pulling wire 107 can be directly connected to the proximal end or the distal end of the second sliding member 82, and when the adjusting member 81 is rotated, the two pulling wires are pulled during the axial movement of the second sliding member 82 so as to adjust the bending direction and the bending degree of the distal end of the ablation catheter 100.

As shown in fig. 10, the second slider 82 may further include a slider through hole 821, and the electrode lead 108 may pass through the slider through hole 821.

In the non-use state, the first sliding part 41 of the diameter adjusting mechanism 4 is located at the middle position (middle position state) of the first sliding chute 11, the inner pipe is in a linear state (i.e. bending does not occur), the rotating adjusting part 81 of the bending adjusting mechanism 8 is in the middle position state, and both the pull wires are in a relaxed state.

In operation, when the first sliding member 41 is pushed away toward the distal end of the handle body 1, the inner tube 102 is driven to axially move toward the distal end of the handle body 1, so that the diameter of the basket 103 is reduced, the contraction function of the basket 103 can be realized, when the first sliding member 41 is pulled back toward the proximal end of the handle body 1, the inner tube 102 is driven to axially move toward the proximal end of the handle body 1, the diameter of the basket 103 is increased, the expansion function of the basket 103 can be realized, and liquid is injected into the through cavity 105 (shown in fig. 8) of the ablation catheter 100 through the side tube 21, so that the liquid flows out from the distal end of the ablation catheter 100.

When the curvature and the bending direction of the distal end of the ablation catheter need to be adjusted, the rotating adjusting piece 81 is rotated clockwise to axially move the second sliding piece 82 towards the proximal end of the handle body 1, the distal end of the ablation catheter 100 is bent towards one side of the short pull wire 107 by pulling the short pull wire 107, or the rotating adjusting piece 81 is rotated counterclockwise to axially move the second sliding piece 82 towards the distal end of the handle body 1, and the distal end of the ablation catheter 100 is bent towards one side of the long pull wire 106 by pulling the long pull wire 106.

In the present invention, the outer tube 101 and/or the inner tube 102 of the ablation catheter 100 may be tapered with stiffness from the proximal end of the ablation catheter towards the distal end to achieve twisting of the ablation catheter 100.

A Y-shaped hemostasis valve may be provided on the luer fitting to prevent air from entering the inner tube 102.

The invention is convenient for an operator to finish the diameter adjustment of the basket and the bending adjustment of the ablation catheter by one hand, so that the operator can finish the operation independently, and the labor burden of an operation site is greatly saved.

Claims (10)

1. A catheter adjustment handle, comprising a handle body (1), characterized in that: the ablation catheter comprises a handle body (1), wherein a cavity is formed in the handle body (1), a catheter inserting hole (2) for inserting an ablation catheter is formed in the far end of the handle body (1) so that the ablation catheter can be fixed in the handle body (1), a penetrating hole (3) for allowing an inner tube of the ablation catheter to penetrate out is formed in the handle body (1), a diameter adjusting mechanism (4) is arranged on the handle body (1), and the diameter adjusting mechanism (4) pushes the inner tube or the outer tube of the ablation catheter to move axially so as to adjust the diameter of a basket at the far end of the ablation catheter.

2. The catheter adjustment handle according to claim 1, wherein: the diameter adjusting mechanism (4) comprises a first sliding piece (41) and a first limiting piece (42), a first sliding groove (11) is formed in the outer wall of the handle body (1) and is arranged along the axial direction of the handle body (1), the first limiting piece (42) is arranged in a cavity of the handle body (1), a connecting portion of the first sliding piece (41) penetrates through the first sliding groove (11) and then extends into the cavity of the handle body (1) and is fixedly connected with the first limiting piece (42), a fixing through groove (421) for fixing an outer tube or an inner tube of the ablation catheter is formed in the first limiting piece (42), so that the outer tube or the inner tube of the ablation catheter penetrates through the fixing through groove (421) and is fixed with the fixing through groove, and the first sliding piece (41) is pushed to drive the first limiting piece (42) to drive the outer tube or the inner tube of the ablation catheter to move axially.

3. The catheter adjustment handle according to claim 2, wherein: the diameter adjusting mechanism (4) further comprises a second limiting piece (43), the second limiting piece (43) is fixed in the cavity of the handle body (1), a second sliding groove (431) is formed in the second limiting piece (43) and arranged along the axial direction of the handle body (1), and the first limiting piece (42) is arranged in the second sliding groove (431) and can move back and forth in the second sliding groove (431) so as to guide the first limiting piece (42).

4. The catheter adjustment handle of claim 3 wherein: the pressing plate (422) is arranged on one side, located on the fixing through groove (421), of the first limiting part (42), a pressing cover (424) is arranged on the pressing plate (422), the pressing cover (424) is n-shaped, a through groove (426) is formed in the pressing cover (424), the pressing cover (424) covers the first limiting part (42) through the through groove (426) and presses the pressing plate (422) on the first limiting part (42), two ends of the pressing cover (424) are fixed on the second limiting part (43), an adjusting screw (423) which cannot be disengaged is arranged on the pressing plate (422), an adjusting screw hole (425) is formed in the pressing cover (424), the adjusting screw (423) is in threaded connection with the adjusting screw hole (425), and when the adjusting screw (423) is screwed, the pressing plate (422) can move axially along the adjusting screw hole (425).

5. The catheter adjustment handle of claim 4 wherein: be equipped with fixing base (7) in the cavity of handle body (1), fixing base (7) are fixed in handle body (1), be equipped with fixing base cavity (71) in fixing base (7), serve at fixing base (7) and catheter insertion hole (2) relative one and be equipped with first fixing base through-hole (72) with fixing base cavity (71) intercommunication, fix in first fixing base through-hole (72) with the outer tube of melting the pipe, be equipped with second fixing base through-hole (73) with fixing base cavity (71) intercommunication on the proximal end terminal surface of fixing base (7), pass fixing base (7) with the inner tube that supplies to melt the pipe, be equipped with hemostasis valve (74) on one side that fixing base cavity (71) are located second fixing base through-hole (72).

6. The catheter adjustment handle according to claim 5, wherein: the handle is characterized in that a tubular side arm (75) is further arranged on the fixed seat (7), the side arm (75) extends out of the handle body (1) from a hole in the handle body (1), and a three-way valve (76) is connected to the side arm (75).

7. The catheter adjustment handle according to any one of claims 1-6, wherein: the handle comprises a handle body (1), and is characterized in that a bending adjusting mechanism (8) is further arranged on the handle body (1), the bending adjusting mechanism (8) comprises a rotary adjusting piece (81) and a second sliding piece (82), the rotary adjusting piece (81) is rotatably fixed in a cavity of the handle body (1), a rotary window (12) is arranged on the outer wall of the handle body (1) and positioned at the position of the rotary adjusting piece (81) to expose part of the rotary adjusting piece (81), threads are arranged on the outer wall of the second sliding piece (82), an adjusting piece through hole (811) for the second sliding piece (82) to pass through is arranged in the rotary adjusting piece (81), the adjusting piece through hole (811) is a threaded hole to realize threaded connection with the second sliding piece (82), a second guide piece (15) is arranged in the cavity of the handle body (1), an axially arranged guide sliding chute (821) is arranged on the second sliding piece (82), and the second guide piece (15) is arranged in the guide chute (821), when the rotating adjusting piece (81) is rotated in the rotating window (12), the second sliding piece (82) is driven to move axially so as to pull the two pull wires of the ablation catheter, and the bending degree of the far end of the ablation catheter is adjusted.

8. The catheter adjustment handle of claim 7 wherein: the handle is characterized in that a first guide piece (5) is arranged in a cavity of the handle body (1), one end of the first guide piece (5) is connected with the penetrating port (3), a first guide piece through hole (51) is formed in the first guide piece (5), and the first guide piece through hole (51) is communicated with the penetrating port (3) so that the inner pipe extends out of the handle body (1) from the penetrating port (3) through the first guide piece through hole (51).

9. The catheter adjustment handle of claim 8 wherein: the handle body (1) is also provided with a lead leading-out port (6) for leading out an electrode lead of the ablation catheter from the lead leading-out port (6) and then electrically connecting with an electric appliance connector.

10. An ablation system comprising an ablation catheter (100), characterized by: the catheter adjusting handle further comprises a catheter adjusting handle according to any one of claims 1 to 9, the ablation catheter (100) comprises an outer tube (101), an inner tube (102) and two pull wires (103), the inner tube (102) is arranged in the outer tube (101) and can move axially relative to the outer tube, a through cavity is formed between the inner tube (102) and the outer tube (101), the outer tube (101) is fixed in a cavity of the handle body (1), and the inner tube (102) is driven by a diameter adjusting mechanism to move axially in the outer tube (101) so as to adjust the diameter of a basket arranged at the distal end of the ablation catheter (100).

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