CN202982206U - Multi-electrode radio frequency ablation catheter - Google Patents
Multi-electrode radio frequency ablation catheter Download PDFInfo
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- CN202982206U CN202982206U CN 201220525742 CN201220525742U CN202982206U CN 202982206 U CN202982206 U CN 202982206U CN 201220525742 CN201220525742 CN 201220525742 CN 201220525742 U CN201220525742 U CN 201220525742U CN 202982206 U CN202982206 U CN 202982206U
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Abstract
The utility model discloses a multi-electrode radio frequency ablation catheter. The multi-electrode radio frequency ablation catheter comprises a catheter ablation working end (1), a main body section (2) and a control handle (3). The catheter ablation working end (1) is a kinematic pair mechanism (31) with a multi-electrode electrode tube. The main body section (2) is formed by an outer cannula (4) and an inner core (5), and the outer cannula (4) and the inner core (5) are respectively connected with two ends of the kinematic pair mechanism (31). An externally-arranged radio frequency ablation generator (26) is communicated with the multi-electrode electrode tube (7) through copper wires which is arranged in the control handle (3) and the main body section (2). The control handle (3) is internally provided with a twitch control device which is connected with the inner core (5). The multi-electrode radio frequency ablation catheter is simple in operation, convenient to operate, flexible in adjustment, and accurate in ablation location. In addition, ablation temperature can be monitored in real time, mapping ablation can be operated repeatedly until an effect is exact, a curative effect is improved, complications of treatment are reduced, and risks of operations are reduced.
Description
Technical field
This utility model belongs to technical field of medical instruments, comprises the multi-pole rf ablation catheter of renal artery blood vessel, more specifically relates to multi-pole rf ablation catheter and the method for designing for the treatment of intractable hypertension a kind of simple to operate, quick and safe.
Background technology
Hypertension is suffered from the whole world approximately 1,000,000,000 adults, wherein 1/3 obtains effectively to control.Underdiagnosis and to treat compliance poor be one of not good enough reason of curative effect is even but a large amount of patient accepts the optimal drug treatment still can not be effectively controlled.American heart association (American Heart Association, AHA)
Delivered scientific statement in 2008, intractable hypertension is defined as; Improve through life style, take simultaneously the antihypertensive drugs (wherein a kind of is diuretic) of 3 kinds of different mechanism of action, or need at least 4 kinds of medicines systolic pressure and diastolic pressure could be controlled at target level (＜140/90 mmHg).Not yet accurately add up about the sickness rate of intractable hypertension at present, but multinomial clinical research points out such patient to account for hyperpietic's 20% ~ 30%.Chinese cardiovascular diseases report in 2007 points out, the present hyperpietic of China has 200,000,000 people at least, and nearly 5,000 ten thousand obstinate hypertension are wherein arranged.Process is to 180 routine human dissections, and statistics draws: renal artery length is approximately about 30 mm; The arteriorenal average caliber of male is: left side Ф 6 ± 2.4mm, right side Ф 6.7 ± 2.6 mm; Women's average caliber is: left side Ф 4.2 ± 2.4 mm, right side Ф 4.6 ± 2.2 mm.
2009 world-renowned medical journal " lancet " delivered with the research paper headed by Australian doctor Krum, having confirmed to get involved in renal artery radio frequency method is effective to treatment hypertension.Therefore the perpetrator Mark Gelfand of this technology and Howard R.Levin win 2011 annual U.S. Edison utility model silver medals.
Rf ablation therapeutic instrument mainly comprises radio-frequency (RF) ablation generator, therapeutic electrode and indifferent plate electrode, and the radio-frequency (RF) ablation generator can produce the altofrequency electromagnetic wave of lasting or impulse form, is comprised of alternating electric field and magnetic field.The ultimate principle of radiofrequency ablation therapy is target tissue to be imposed the radio-frequency current of frequency 500KHz left and right, make in-house polar molecule be in a kind of foment, concussion friction at a high speed occurs, and produce biological heat, when local temperature surpasses 45-50 ℃, can cause intracellular protein denaturation, the lipid layer dissolving, cell membrane bursts apart, the cell loss of water, cause the target tissue coagulation necrosis
Prior art WO02010078175 discloses and has entered renal artery and the renal artery sympathetic nerve is carried out apparatus and the method that thermal induction is processed.This apparatus adopts the multisection type guide-tube structure, by each control line of pulling back, applies compression and bending force to each buckled zone, and heating element heater is moved towards arteriorenal inwall.But this conduit operation and structure be more complicated all.And this conduit can not adapt to the renal artery of different inner diameters well, and is adherent thereby electrode can't be realized in the renal artery of different inner diameters.
Through conduit Renal denervation art (Transcatheter Renal Denervation, TRenD) or kidney to go sympathetic nerve art (Renal Sympathetic Denervation, RSD) be in the world the up-to-date hypertensive method of a kind of non-medicine interventional therapy.JIUYUE was held Asia-Pacific TRenD meeting in Hong Kong Marriott Hotel on 24th in 2011, Medtronics company pass through in meeting transmission of video live in the world unique commercial Symplicity ablation catheter and on-the-spot demonstration 3 example operations.But Symplicity ablation catheter and Therapeutic Method have the following disadvantages; 1) can't mapping renal artery sympathetic innervation point, 6～8 points need to be melted at random and just requirement can be reached; 2) can't mapping melt state, the judgement ablation effect; When 3) treating, ablation points is inhomogeneous, may repeat to melt to same point, and the danger of vascular puncture is arranged; 4) too much ablation points causes the blood vessel wall cicatrix too much, might cause renal artery stenosis.
The radio frequency ablation catheter of a kind of better efficacy of current utility model, technical monopoly and the produce market of breaking U.S.'s Renal denervation radio-frequency (RF) ablation monopolize situation, and the development of national industry is exactly the task of top priority of TRenD Therapeutic Method.
Summary of the invention
For the shortcoming that prior art exists, it is a kind of simple to operate that this utility model provides, multi-pole rf ablation catheter and the method for designing of the quick and safe renal artery blood vessel that is suitable for different inner diameters.
Technical solutions of the utility model:
A kind of multi-pole rf ablation catheter, it is divided into three parts: catheter ablation working end, main paragraph and joystick; 1. the catheter ablation working end is the kinematic pair mechanism with multipole electrode tube; 2. main paragraph is made of trocar sheath and inner core, and trocar sheath is connected with inner core with the two ends of kinematic pair mechanism and is connected; 3. external radio-frequency (RF) ablation generator is by being communicated with multipole electrode tube at joystick and the built-in copper conductor of main paragraph, and the built-in twitch control device that is provided with of joystick is connected with inner core.
Preferably:
Kinematic pair as above mechanism is comprised of the single group of many covers kinematic pairs, be umbrella-shaped structure, follower lever and driving lever form single group kinematic pair, driving lever forms to swing with the follower lever shaft and is connected, swing the connected mode that the junction that connects is adopted the location swing or slided and swing, one end of driving lever swings with the prelocalization ring and is connected, and an end of follower lever swings with rear locating ring and is connected; The follower lever other end inwardly has an angle of bend; Follower lever is the internal stent of electrode tube, and the electrode tube of a crooked end is equipped with tip electrode.
Follower lever as above and driving lever are provided with three and are flexibly connected point (A, B, C), the near-end junction point A of follower lever swings with the fitting recess of rear locating ring and is connected, the far-end junction point C of driving lever swings with the fitting recess of prelocalization ring and is connected, intermediate connection point B is the swing junction point of follower lever and driving lever, connected mode comprises that rivet or pin connect, or two bulb joint connect or universal joint connects, the far-end of follower lever is curved end.
The end of inner core as above is connected with the prelocalization ring, prelocalization ring and inner spindle are to being located by connecting and mutually not producing axial float, circumferencial direction is slidably connected, and the end of trocar sheath is fixedly connected with rear locating ring, is respectively equipped with the X-ray developing ring on prelocalization ring and rear locating ring.
Follower lever as above and rear locating ring swing the junction and are provided with the limit ring and are connected with rear locating ring, and the limit ring contacts spacing connection of formation with each follower lever at spacing place.
Joystick front end as above is fixedly connected with trocar sheath, and the joystick first half is provided with the twitch control device, and the diameter digital display meter is equipped with at the rear portion; Inner core in joystick is connected by the inner core catheter adapter of the standard that the handle afterbody is provided with, the built-in circuit that is communicated with multipole electrode tube that is provided with of joystick connects the formation electrode contact from the joystick afterbody, electrode contact is connected with the radio-frequency (RF) ablation generator by middle connecting line, and middle connecting line is told the connection corresponding to multipole electrode tube of many single electrode joints.
Joystick as above inside is provided with cavity, and inner core and copper conductor pass cavity; The built-in twitch control device of joystick comprises inner core knob and cylindrical worm, and the inner core knob is connected with the cylindrical worm screw-threaded engagement, and the centre bore of cylindrical worm is fixedly connected with the outer wall of inner core or a section of inner core is set to cylindrical worm; Opposite side and the in-line gears of cylindrical worm are connected with a joggle, and in-line gears are connected with the counter axis of diameter digital display meter or scale dial gauge.
Tip electrode as above is built-in with temperature sensor, thermoelectricity corner or critesistor are adopted in temperature sensor, tip electrode is connected with copper conductor, and copper conductor connects electrode contact from the joystick afterbody after passing in the inside of electrode tube and the cavity via trocar sheath.
Kinematic pair mechanism is that the single group of 3-6 groups kinematic pairs form as mentioned above, is divided into two series according to the umbrella shape size of umbrella after ductal ectasia, and I series is of a size of; After expansion, the diameter range of the umbrella shape of umbrella is≤Ф 6mm, umbrella shape axial length 〉=16 mm, and I series is applicable to the renal artery of internal diameter Φ 4 mm ~ Ф 6mm; II series is of a size of; After expansion, the diameter range of the umbrella shape of umbrella is≤Ф 9mm, umbrella shape axial length 〉=18 mm, and II series is applicable to the renal artery of internal diameter Φ 6 mm ~ Ф 9mm.
The beneficial effects of the utility model are;
(1) effect and the diameter reading of the digital display meter diameter of accurately controlling conduit folding of multi-pole rf ablation catheter of the present utility model by kinematic pair mechanism, to adapt to the renal artery of different inner diameters, electrode can be evenly distributed on the blood vessel surrounding and adhere well to the renal artery inwall so that mapping melts, make easy and simple to handle, flexible adjustment.
(2) the multi-pole rf ablation catheter has a plurality of distribution of electrodes in surrounding, after once placing conduit, a plurality of electrodes sequentially carry out mapping to the sympathetic innervation point of target tissue successively and melt, and reduce number of operations, repeatedly do not adjust the position of electrode, make whole operation time short.
(3) the sympathetic innervation point of accurate mapping target tissue, melt accurate positioning, reduces the drawback that blindly melts.
(4) built-in temperature sensor, Real-Time Monitoring melts temperature, adjusts in real time radio-frequency power and melts the time, reduces blood vessel injury, and operation controllability is stronger.
(5) melt after again mapping observe ablation effect, but mapping melts repetitive operation to definite effect, improves curative effect.
(6) due to accurate mapping with melt, the operating time is short, therefore can reduce to greatest extent the complication for the treatment of, reduces the risk of operation.
Multi-pole rf ablation catheter of the present utility model is simple in structure, easy to operate, is convenient to industrialized manufacture.
Description of drawings
Fig. 1 is the overall structure schematic diagram of this utility model embodiment 1.
Fig. 2 is the structural representation that this utility model embodiment 1 struts the tip of rear tube.
Fig. 3 is the structural representation of the kinematic pair mechanism of this utility model embodiment 1.
Fig. 4 is the partial structurtes schematic diagram of the kinematic pair mechanism of this utility model embodiment 1.
Fig. 5 is the operation principle schematic diagram of single group kinematic pair of this utility model embodiment 1.
Fig. 6 is the broken section structural representation of the prelocalization ring of this utility model embodiment 1.
Fig. 7 is the structural representation of the rear locating ring of this utility model embodiment 1.
Fig. 8 is the limit structure of rings schematic diagram of this utility model embodiment 1.
Fig. 9 is the main TV structure schematic diagram of the joystick of this utility model embodiment 1.
Figure 10 is the plan structure schematic diagram of the joystick of this utility model embodiment 1.
Figure 11 is the partial schematic diagram of the inner drive mechanism of joystick of this utility model embodiment 1.
Figure 12 is the initial condition schematic diagram that does not strut of this utility model embodiment 1.
Figure 13 is the expansion rear electrode of this utility model embodiment 1 and the schematic diagram of the adherent state of renal artery.
Figure 14 is the user mode schematic diagram in the RSD operation of this utility model embodiment 1.
in figure: the tip 1 of conduit, main paragraph 2, joystick 3, trocar sheath 4, inner core 5, rear locating ring 6, electrode tube 7, driving lever 8, prelocalization ring 9, tip electrode 10, limit ring 11, X-ray developing ring 12, 13, follower lever 14, copper conductor 15, the last straight section 16 of electrode tube 7, inner core knob 17, diameter digital display meter 18, electrode contact 19, cylindrical worm 20, in-line gears 21, inner core catheter adapter 22, the conduit 23 that shrinks, guiding catheter and base 24, renal artery 25, radio-frequency (RF) ablation generator 26, middle connecting line 27, limited impression 28, fitting recess 29, umbrella 30, kinematic pair mechanism 31, single group kinematic pair 32.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is elaborated.Multi-pole rf ablation catheter of the present utility model is designated hereinafter simply as conduit.
When removing kidney sympathetic nerve ablative surgery (RSD or TRenD) through conduit, by just knowing renal artery length and internal diameter after femoral artery puncture and angiography, conduit of the present utility model is transported to the renal artery opening part via guiding catheter, fixedly behind the position of guiding catheter, conduit of the present utility model is passed out in renal artery from guiding catheter, and the compliance of conduit self can make it comply with the distortion of guiding catheter; Then the handle 3 at control lead rear portion slides backward inner core 5, effect downcomer in kinematic pair mechanism is deployed into suitable diameter (can pass through diameter digital display 18 readings), the renal artery blood vessel that mates different inner diameters, develop by X-ray and observe a plurality of electrodes and be evenly distributed on the blood vessel surrounding and adhere well to the renal artery blood vessel, and can be observed the particular location of conduit in renal artery; Open radio-frequency (RF) ablation generator (Ablation and sensing unit, ASU) excite radio-frequency current, the corresponding sympathetic activation domination of mapping target tissue point, then sequentially each target spot is melted successively by a plurality of electrodes, each electrode is done primary energy and is discharged, each persistent period is no more than 2Min, about 8W left and right that releases energy, and in ablation procedure, electrode temperature is controlled at 40 ~ 75 ℃; Because being subjected to artery blood flow, electrode temperature takes away the impact of the factors such as part heat, the temperature that melts by built-in temperature sensor (thermoelectricity corner or critesistor) Real-Time Monitoring target tissue, thereby regulate in real time radio-frequency power, control and melt temperature and melt the time; Mapping and observe ablation effect again after melting, if melt not exclusively, but repetitive operation is until definite effect.Then, conduit is first dwindled about rear propelling 5 mm, and conduit integral-rotation 45o, then the mapping by second group of target sympathetic innervation point of above-described step enforcement melts; To a plurality of electrodes successively sequentially mapping melt, until melted target nerve domination point (approximately 6-8), melt complete after-contraction and closure catheter, then reclaim and withdraw from external via guiding catheter.Therefore remove kidney sympathetic nerve ablative surgery through conduit, reach the purpose for the treatment of intractable hypertension thereby regulated the kidney sympathetic activity,
Conduit shown in Figure 1 is divided into three parts; (1) catheter tip is catheter ablation working end 1; (2) main paragraph 2 is made of trocar sheath 4 and inner core 5; (3) rear portion is joystick 3.Conduit is transported in renal artery by guiding catheter.
Shown in Fig. 2-5: be umbrella 30 after conduit struts, the relative motion between inner core 5 and trocar sheath 4 makes kinematic pair mechanism's 31 actions and critically controls the folding diameter of conduit by the digital display meter reading.X-ray developing ring (12, the 13) material at tip electrode 10 and kinematic pair mechanism 31 two ends is platinumiridio or platinum-tungsten alloys, can develop by X-ray and observe conduit in the endovascular position of renal artery.The material that described electrode tube 7 adopts is thermoplastic elastic material, and thermoplastic elastic material comprises one or more mixtures in Pebax, PA and polyurethane.There are copper conductor and metal rack in its inside, and this metal rack is the follower lever part 14 of kinematic pair; Tip electrode 10 is fixed in last straight section 16 afterbodys of electrode tube 7, tip electrode 10 built-in temperature sensors, tip electrode 10 is connected with copper conductor 15, copper conductor 15 is in the inside of electrode tube and after passing via trocar sheath 4, connect from the joystick afterbody, be connected to radio-frequency (RF) ablation generator 26 by electrode contact 19.
In other embodiment: inner core 5 is for real core body or with the conduit of sealing end, joystick 3 afterbodys not with inner core catheter adapter 22.
I series of conduits or II series of conduits are in expansion process, for example: the umbrella shape diameter of the conduit of I series after expansion be when being Φ 4 mm, tip electrode 10 maintenance levels and be attached at Φ 4 mm arteries inwalls on the last straight section 16 of electrode tube 7; When umbrella shape further is expanded to diameter and is Ф 6mm, the tip electrode 10 of the last straight section 16 of electrode tube 7 has slight upwarping on angle, tip electrode 10 can adhere well to Ф 6mm renal artery blood vessel, and therefore I series of conduits of the present utility model is applicable to the renal artery of internal diameter Φ 4 mm ~ Ф 6mm.
Kinematic pair is by formations such as follower lever 14, driving lever 8, flexible connection point (A, B, C) and limit rings 11.Rear locating ring 6 is assemblied in the front end of trocar sheath 4, organizes the near-end junction point A of follower lever 14 and the fitting recess 29 of rear locating ring 6 more and concentrates at respectively on rear locating ring by modes such as tinsel or jump rings, can be around A point flexible rotating after assembling; Follower lever 14 is assemblied in intermediate connection point B place with driving lever 8 again, can be around intermediate connection point B flexible rotating after assembling, trocar sheath 4 front ends are fixedly connected with rear locating ring 6, the outer wall of inner core 5 is provided with protruding position and is connected with prelocalization ring 9 matched in clearance with limited impression 28, make prelocalization ring 9 not rotate with inner core, only move forward or backward with inner core 5, and axial float does not occur in the prelocalization ring on inner core.The far-end junction point C of many group driving levers 8 and the fitting recess of prelocalization ring 9 concentrate at respectively on the prelocalization ring by modes such as tinsel or jump rings, can be around C point flexible rotating after assembling; The flexible connection of locating at junction point (A, B, C) comprises that tinsel passes the connection of connecting hole, and axle and interporal lacuna are connected, and rivet or pin connect, or the movable connection method such as two bulb joint connections;
When ductal ectasia arrives maximum gauge, the limit ring 11 constrained motion pairs on rear locating ring can not continue to rotate backward around connecting A, have the position limitation protection function.
The operation principle of single group kinematic pair 32; When the relative position of trocar sheath 4 maintained static, by handle pumpback inner core 5, inner core 5 slided backward, and the moving point C on prelocalization ring 9 retreats, and driving lever 8 turns clockwise around the C point simultaneously; Driving lever 8 also turns clockwise around moving point B with follower lever 14 and moves upward simultaneously; Follower lever 14 is rotated counterclockwise around moving point A; Therefore, during the pumpback inner core, the kinematic pair action makes the last straight section 16 on follower lever move upward, and reaches the purpose of expanded in diameter.
When the relative position of trocar sheath 4 maintains static, when inner core 5 is protruding, the relative motion of follower lever 14 and driving lever 8 is just in time opposite with above-mentioned action, makes reduced, so the interaction energy of the relative motion between inner core and trocar sheath and kinematic pair thereof is controlled the folding diameter of conduit.
The rear locating ring 6 of hollow assembles and is fixed in the front end of trocar sheath 4, the near-end junction point A of many group follower levers 14 and the fitting recess 29(of rear locating ring 6 are as shown in Figure 7) concentrate at respectively on rear locating ring 6 by modes such as tinsel or jump rings, can be around A point flexible rotating after assembling; Follower lever 14 is assemblied in driving lever 8 again and is flexibly connected some B place, can be around B point flexible rotating after assembling; The outer wall of inner core 5 is provided with protruding position and is connected with prelocalization ring 9 matched in clearance with limited impression 28, make prelocalization ring 9 not rotate with inner core, only move forward or backward with inner core, and axial float does not occur in the prelocalization ring on inner core, the far-end junction point C of many group driving levers 8 and the fitting recess 29(of prelocalization ring 9 are as shown in Figure 6) concentrate at respectively on the prelocalization ring by modes such as tinsel or jump rings, can be around C point flexible rotating after assembling; The flexible connection of locating at junction point (A, B, C) comprises that tinsel passes the connection of connecting hole, and axle and interporal lacuna are connected, and rivet or pin connect, or the movable connection method such as two bulb joint connections; When kinematic pair was expanded to maximum gauge, the limit ring 11(on rear locating ring was as shown in Figure 8) restriction follower lever 14 can not continue to rotate backward around connecting A, has the position limitation protection function.
Shown in Fig. 9-11: during the joystick 3 pumpback inner core 5 at control lead rear portion, the digital display meter diameter reading 18 that is provided with in effect by kinematic pair mechanism 31 and joystick 3, thereby critically the folding diameter of controlled motion vice mechanism 31 is to adapt to the renal artery of different inner diameters, be umbrella 30 after 31 expansions of kinematic pair mechanism, a plurality of tip electrodes 10 are evenly distributed on the blood vessel surrounding and adhere well to the renal artery inwall so that mapping melts.
Inner core catheter adapter 22 can be connected with Y type haemostatic valve when operation, is convenient to by seal wire or contrast agent etc.; Middle connecting line 27 is told many with the single electrode joint of different colours and numbering, when being convenient to perform the operation, each electrode is sequentially melted successively; The material of handle is the thermoplasticity engineering materials such as Merlon or polyformaldehyde.
Thereby the relative motion between inner core 5 and trocar sheath 4 makes 31 actions of kinematic pair mechanism and critically controls the folding diameter of conduit by the digital display meter reading, with the renal artery that adapts to different inner diameters and make electrode adhere well to blood vessel.
Handle front end and trocar sheath assemble and fix, and the first half of handle is equipped with inner core knob 17, and diameter digital display meter 18 is equipped with at the rear portion; The handle afterbody has the inner core catheter adapter 22 of standard to connect, and is connected with Y type haemostatic valve during operation; The cavity of handle inside connects electrode contact 19 by inner core 5 and copper conductor 10 from the handle afterbody, connecting line 27 in the middle of can connecting afterwards, and middle connecting line is told four with the single electrode joint of different colours and numbering, is convenient to each electrode is melted respectively.
The structure of diameter digital display meter 18 or scale dial gauge; At the handle rear portion, the diameter digital display meter is housed.Be equipped with in-line gears 21 on the diameter digital display meter, the cylindrical worm 20 of in-line gears and inner core is connected with a joggle.When rotary inner core knob 17, the cylindrical worm 20 of inner core is gear motion thereupon, gear gear motion on the counter axis of the synchronous and digital display meter of this cylindrical worm, the precision drive of in-line gears makes digital display meter correspondingly count work, thereby reads the diameter data of corresponding conduit.
Shown in Figure 12-14, the multi-pole rf ablation catheter in RSD (Renal Sympathetic Denervation, RSD) operation the process status schematic diagram.In the RSD operation process, be deployed into suitable diameter by the inner core knob 17 control conduits of handling on joystick, a plurality of electrodes adhere well to renal artery 25 inwalls and carry out the process status that mapping melts.Figure guiding catheter and base 24 thereof for delivery of conduit of the present utility model in renal artery.The electrode contact 19 of the joystick afterbody of the conduit of the present embodiment is connected respectively to radio-frequency (RF) ablation generator (Ablation and Sensing Unit by four single electrodes of middle connecting line 27, ASU) on four electrode interfaces on, use simultaneously the selection rotary switch on ASU to be transferred to corresponding position, just can excite the radio-frequency (RF) ablation electric current.Can controlledly sequentially select like this ablating electrode operation.
Effect and the diameter reading of the digital display meter deployed diameter of accurately controlling conduit of the present embodiment by kinematic pair, to be adapted to the renal artery of different inner diameters, a plurality of electrodes adhere well to the blood vessel mapping and melt, therefore easy and simple to handle, flexible adjustment, ablation effect is definite, reduces the risk of operation.This utility model is not limited to the content described in the above-mentioned specific embodiment.
Claims (9)
1. multi-pole rf ablation catheter, it is divided into three parts: catheter ablation working end (1), main paragraph (2) and joystick (3); It is characterized in that: 1. catheter ablation working end (1) is the kinematic pair mechanism (31) with multipole electrode tube (7); 2. main paragraph (2) is made of trocar sheath (4) and inner core (5), and trocar sheath (4) is connected 5 with inner core) respectively the two ends with kinematic pair mechanism (31) be connected; 3. external radio-frequency (RF) ablation generator (26) is by being communicated with multipole electrode tube (7) at joystick (3) and the built-in copper conductor (15) of main paragraph (2), and the built-in twitch control device that is provided with of joystick (3) is connected with inner core (5).
2. a kind of multi-pole rf ablation catheter as claimed in claim 1, it is characterized in that, described kinematic pair mechanism (31) is comprised of many covers single group kinematic pairs (32), be umbrella (30) structure, follower lever (14) and driving lever (8) form single group kinematic pair (32), driving lever (8) forms to swing with follower lever (14) shaft and is connected, swing the connected mode that the junction that connects is adopted the location swing or slided and swing, one end of driving lever (8) swings with prelocalization ring (9) and is connected, and an end of follower lever (14) swings with rear locating ring (6) and is connected; Follower lever (14) other end inwardly has an angle of bend; Follower lever (14) is the internal stent of electrode tube (7), and the electrode tube of a crooked end is equipped with tip electrode (10).
3. a kind of multi-pole rf ablation catheter as claimed in claim 2, it is characterized in that, described follower lever (14) and driving lever (8) are provided with three and are flexibly connected point (A, B, C), the near-end junction point A of follower lever (14) swings with the fitting recess of rear locating ring (6) and is connected, the far-end junction point C of driving lever (8) swings with the fitting recess of prelocalization ring (9) and is connected, intermediate connection point B is the swing junction point of follower lever (14) and driving lever (8), connected mode comprises that rivet or pin connect, or two bulb joint connect or universal joint connects, the far-end of follower lever (14) is curved end.
4. a kind of multi-pole rf ablation catheter as claimed in claim 2 or claim 3, it is characterized in that, the end of described inner core (5) is connected with prelocalization ring (9), prelocalization ring (9) is connected with inner core (5) axial location and does not mutually produce axial float, circumferencial direction is slidably connected, the end of trocar sheath (4) is fixedly connected with rear locating ring (6), is respectively equipped with X-ray developing ring (12,13) on prelocalization ring (9) and rear locating ring (6).
5. a kind of multi-pole rf ablation catheter as claimed in claim 2 or claim 3, it is characterized in that, described follower lever (14) and rear locating ring (6) swing the junction and are provided with limit ring (11) and are connected with rear locating ring (6), and limit ring (11) contacts spacing connection of formation with each follower lever (14) at spacing place.
6. a kind of multi-pole rf ablation catheter as claimed in claim 2 or claim 3, it is characterized in that, described joystick (3) front end is fixedly connected with trocar sheath (4), and joystick (3) first half is provided with the twitch control device, and diameter digital display meter (18) is equipped with at the rear portion; Inner core (5) in joystick (3) is connected by the inner core catheter adapter (22) of the standard that the handle afterbody is provided with, the built-in circuit that is communicated with multipole electrode tube (7) that is provided with of joystick (3) connects formation electrode contact (19) from joystick (3) afterbody, electrode contact (19) is connected with radio-frequency (RF) ablation generator (26) by middle connecting line (27), and middle connecting line (27) is told many single electrode joints and the corresponding connection of multipole electrode tube (7).
7. a kind of multi-pole rf ablation catheter as claimed in claim 2 or claim 3, is characterized in that, described joystick (3) inside is provided with cavity, and inner core (5) and copper conductor (15) pass cavity; The built-in twitch control device of joystick (3) comprises inner core knob (17) and cylindrical worm (20), inner core knob (17) is connected 20 with cylindrical worm) screw-threaded engagement connects, and the centre bore of cylindrical worm (20) is fixedly connected with the outer wall of inner core (5) or a section of inner core (5) is set to cylindrical worm (20); The opposite side of cylindrical worm (20) and in-line gears (21) are connected with a joggle, and in-line gears (21) are connected with the counter axis of diameter digital display meter (18) or scale dial gauge.
8. a kind of multi-pole rf ablation catheter as claimed in claim 2 or claim 3, it is characterized in that, described tip electrode (10) is built-in with temperature sensor, thermoelectricity corner or critesistor are adopted in temperature sensor, tip electrode (10) is connected with copper conductor (15), and copper conductor (15) connects electrode contact (19) from joystick (3) afterbody after passing in the inside of electrode tube (7) and the cavity via trocar sheath (4).
9. a kind of multi-pole rf ablation catheter as claimed in claim 1, it is characterized in that, described kinematic pair mechanism (31) is that 3-6 groups single group kinematic pairs (32) form, and is divided into two series according to the umbrella shape size of umbrella after ductal ectasia (30), and I series is of a size of; After expansion, the diameter range of the umbrella shape of umbrella is≤Ф 6mm, umbrella shape axial length 〉=16 mm; II series is of a size of; After expansion, the diameter range of the umbrella shape of umbrella (30) is≤Ф 9mm, umbrella shape axial length 〉=18 mm.
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| CN 201220525742 CN202982206U (en) | 2012-10-15 | 2012-10-15 | Multi-electrode radio frequency ablation catheter |
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| CN 201220525742 CN202982206U (en) | 2012-10-15 | 2012-10-15 | Multi-electrode radio frequency ablation catheter |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102860867A (en) * | 2012-10-15 | 2013-01-09 | 陈平根 | Multi-electrode radio frequency ablation catheter and design method thereof |
| CN104799937A (en) * | 2014-01-27 | 2015-07-29 | 深圳市信立泰生物医疗工程有限公司 | Renal nerve ablation catheter and application thereof |
| CN105852962A (en) * | 2016-04-29 | 2016-08-17 | 廖申扬 | Ablation catheter capable of precisely adjusting tubular tissue |
| CN106963486A (en) * | 2017-05-20 | 2017-07-21 | 王新 | A kind of esophageal regurgitation radio-frequency ablation electrode |
| CN107174336A (en) * | 2017-05-20 | 2017-09-19 | 王新 | A kind of esophageal regurgitation radio-frequency ablation electrode |
| CN110160676A (en) * | 2018-02-11 | 2019-08-23 | 上海微创电生理医疗科技股份有限公司 | Pressure sensor and its electrophysiologicalcatheter catheter |
-
2012
- 2012-10-15 CN CN 201220525742 patent/CN202982206U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102860867A (en) * | 2012-10-15 | 2013-01-09 | 陈平根 | Multi-electrode radio frequency ablation catheter and design method thereof |
| CN102860867B (en) * | 2012-10-15 | 2014-11-05 | 陈平根 | Multi-electrode radio frequency ablation catheter and design method thereof |
| CN104799937A (en) * | 2014-01-27 | 2015-07-29 | 深圳市信立泰生物医疗工程有限公司 | Renal nerve ablation catheter and application thereof |
| CN104799937B (en) * | 2014-01-27 | 2019-02-19 | 深圳市信立泰生物医疗工程有限公司 | A kind of renal nerve ablation catheter and its application |
| CN105852962A (en) * | 2016-04-29 | 2016-08-17 | 廖申扬 | Ablation catheter capable of precisely adjusting tubular tissue |
| CN106963486A (en) * | 2017-05-20 | 2017-07-21 | 王新 | A kind of esophageal regurgitation radio-frequency ablation electrode |
| CN107174336A (en) * | 2017-05-20 | 2017-09-19 | 王新 | A kind of esophageal regurgitation radio-frequency ablation electrode |
| CN110160676A (en) * | 2018-02-11 | 2019-08-23 | 上海微创电生理医疗科技股份有限公司 | Pressure sensor and its electrophysiologicalcatheter catheter |
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