CN202426649U

CN202426649U - Ringlike multi-point radio-frequency ablation electrode

Info

Publication number: CN202426649U
Application number: CN201120542204XU
Authority: CN
Inventors: 齐景宪; 王萍; 吴昌归; 宋立强; 李强; 童朝辉; 徐莉莉; 曾奕明; 李时悦; 钟南山; 侯刚; 王涛; 田昆玲
Original assignee: 王涛; 田昆玲
Priority date: 2011-12-22
Filing date: 2011-12-22
Publication date: 2012-09-12
Anticipated expiration: 2021-12-22

Abstract

The utility model discloses a ringlike multi-point radio-frequency ablation electrode. The diameters of the ringlike multi-point radio-frequency ablation electrodes can be adjusted and controlled so that the ringlike multi-point radio-frequency ablation electrodes can be adhered to the walls of the bronchi with different thickness under appropriate pressure to realize the radio-frequency ablation operation rapidly and continuously. The ringlike multi-point radio-frequency ablation electrode comprises a handle (1) and a push-pull rod (2) and is characterize in that an external multicavity pipe (3) is fixedly connected with the handle (1), the front ends of a multi-point electrode (5), a front head (6) and an inner core (4) are fixedly connected together, the other end of the multi-point electrode (5) is fixedly connected with the front end of the external multicavity pipe (3), and the rear end of the inner core (4) is connected with the push-pull rod (2).

Description

Annular multiple spot radio-frequency ablation electrode

Technical field:

This utility model belongs to medical apparatus and instruments, specifically is a kind of annular multiple spot radio-frequency ablation electrode of interventional therapy.

Background technology:

Bronchial asthma (be called for short down asthma) be a kind of be the disease of cardinal symptom with the panting of outbreak repeatedly, uncomfortable in chest, dyspnea, cough, the patient has airway hyperreactivity and chronic airway inflammation.Chronic asthma is a principal character with the Airway Remodeling, the most important thing is the airway smooth muscle hypertrophy; Acute asthma then has multiple motivating factor, generally shows as airway smooth muscle and shrinks the airway constriction that causes.The participation of smooth muscle makes becomes possibility with it as the treatment target spot; It is the determiner that causes bronchoconstriction that airway smooth muscle shrinks; Induction type anti-inflammatory agent (comprising glucocorticoid) and long acting beta agonists are the main medicines of severe asthma in the treatment, but a lot of patient with severe symptoms is insensitive to this treatment.Through the bronchus radio-frequency ablation procedure be one through reduce the technology of airway smooth muscle contractility and high response to the therapeutic heat of airway walls transfer controlled; Radio-frequency ablation technique is used to treat the airways in humans disease can reduces airway smooth muscle quantity; Thereby make the invalid asthmatic patient remission of general treatment; Acute exacerbation reduces; And existing ablating electrode needs to select for use according to bronchial diameter the circumferential ablation electrode of corresponding diameter, can not be applied to the bronchus of different thicknesses, can not realize radiofrequency ablation therapy operation rapidly, continuously.

The utility model content:

The goal of the invention of this utility model is to disclose a kind of diameter of adjusting and controlling annular electrode, makes the different bronchus of electrode pair thickness all obtain the adherent pressure that suits, and realizes the annular multiple spot radio-frequency ablation electrode of radiofrequency ablation therapy operation rapidly, continuously.

The technical solution that realizes this utility model is following: comprise handle and push-pull bar; Key is that outer multi-lumen tube and handle are affixed; The front end of front end, multipoint electrode and inner core is fixed together, and the multipoint electrode other end is affixed with outer multi-lumen tube front end, and the rear end of inner core is connected with push-pull bar.

Have in the described outer multi-lumen tube one can pass inner core cavity, also have one can insert multipoint electrode and lead-in wire cavity.

The structure of described multipoint electrode is that an electrode multi-lumen tube is arranged, and a temperature sensor cable passage, electrode cable passage and nitinol alloy wire passage are arranged in the electrode multi-lumen tube, and the electrode multi-lumen tube is arranged with electrode retaining collar, and the inwall of electrode retaining collar is provided with electrode and temperature sensor.

The front end surface of described push-pull bar has the corresponding diameter scale mark that shows multielectrode diameter.

The diameter of annular electrode can accurately adjusted and control to this utility model, makes the different bronchus of a plurality of electrode pair thicknesses all obtain the adherent pressure that suits, to guarantee radio system constant relatively to the tracheal wall impedance; Make radio frequency output energy stabilization; Because the increase of electrode points then can be switched on separately to a plurality of radio-frequency ablation electrodes, or all switched on simultaneously; Or carry out the interval and switch on; Or switch in proper order by setting, realize radiofrequency ablation therapy operation rapidly, continuously, safe and therapeutic effect good.

Description of drawings:

Fig. 1 is the structural representation of an embodiment of this utility model.

Fig. 2 is the partial sectional view of front end part among Fig. 1.

Fig. 3 is the partial sectional view of follower head part among Fig. 1.

Fig. 4 is the sectional schematic diagram of A-A position among Fig. 3.

Fig. 5 is the structural representation of multipoint electrode.

Fig. 6 is the sectional schematic diagram of B-B position among Fig. 5.

Fig. 7 is the structure cutaway view of electrode retaining collar.

The specific embodiment:

See also Fig. 1～Fig. 7; The specific embodiment of this utility model is following: comprise handle 1 and push-pull bar 2; Key is that outer multi-lumen tube 3 is affixed with handle 1, and the front end of front end 6, multipoint electrode 5 and inner core 4 is fixed together, and multipoint electrode 5 other ends are affixed with outer multi-lumen tube 3 front ends; The rear end of inner core 4 is connected with the front end of push-pull bar 2, and the rear end of push-pull bar 2 has external cable to connect 16; Handle 1 is processed (like polyurethane kind) with push-pull bar 2 for medical macromolecular materials, and push-pull bar 2 can carry out displacement in handle 1; Outer multi-lumen tube 3 is processed (like polyurethane kind) for medical macromolecular materials; It has one can pass inner core 4 cavity; Also have one can insert multipoint electrode 5 and lead-in wire cavity (shown in Figure 4), the tail end of the front end of outer multi-lumen tube 3 and multipoint electrode 5 is affixed, the rear end of outer multi-lumen tube 3 and handle 1 are affixed; Inner core 4 is nickel-titanium metal silk or other tinsel; Can be many with strand form formation or for single; The rear end of inner core 4 and push-pull bar 2 are affixed; Inner core 4 stretches out a segment length from the front ends of outer multi-lumen tube 3, through push-pull bar 2 inner core 4 is moved back and forth outside in the multi-lumen tube 3, and inner core 4 stretches out the front end 6 affixed (illustrated in figures 1 and 2) of metal material of front end and a sphere-like of outer multi-lumen tube 3; Multipoint electrode 5 constitutes (shown in Figure 5) by nickel-titanium memory shape alloy silk 15, electrode retaining collar 8, temperature sensor 13 and electrode multi-lumen tube 7; Electrode multi-lumen tube 7 is processed for the flexible medical macromolecular material; Its body is provided with temperature sensor cable passage 9, electrode cable path 10 and nitinol alloy wire passage 11 (shown in Figure 6); Nitinol alloy wire 15 places in the nitinol alloy wire passage 11, is interval with a plurality of electrode retaining collars that are made of metal 8 on the electrode multi-lumen tube 7, and electrode retaining collar 8 is at least 2; Be equipped with an electrode 12 and a temperature sensor 13 on the inwall of each electrode retaining collar 8; Electrode 12 and electrode retaining collar 8 welding (shown in Figure 7), temperature sensor 13 place electrode 12 other or belows, and the cable of each electrode retaining collar 8, temperature sensor 13 is connected with external cable interface 16 on the handle 1 through electrode cable path 10 and temperature sensor cable passage 9 respectively; Radio-frequency ablation electrode is formed in electrode retaining collar 8, electrode 12 and temperature sensor 13; To a plurality of electrodes 12 can switch on separately, all energisings, at interval energising or switch in proper order carrying out RF ablation by setting, the front end affixed (shown in Figure 2) of an end of multipoint electrode 5 and front end 6 and inner core 4, and around inner core 4; The other end of multipoint electrode 5 is then affixed with the front end of outer multi-lumen tube 3; (shown in Figure 3), circular for making multipoint electrode 5 have a preset expansion, the nitinol alloy wire 15 in the nitinol alloy wire passage 11 of multipoint electrode 5 is by prefabricated spiral ring for rotating to an angle around inner core 4 axis; When multipoint electrode 5 launches, form spiral ring (shown in Figure 1), multipoint electrode 5 launches the expansion back fully and forms a complete annulus; For showing that intuitively multipoint electrode 5 forms the diameter of spiral ring when launching, be provided with the diameter scale mark 14 of the spiral ring diameter of corresponding demonstration multi-electrode 5 in the front end surface of push-pull bar 2.

During use, promote push-pull bar 2 forward earlier, inner core 4 stretches out forward; Along with inner core 4 constantly stretches out forward, ring-type multipoint electrode 5 drive of stretching out forward owing to inner core 4 changes pitch in the shape of a spiral, and diameter also changes; Be coaxial linear state until multipoint electrode 5 and inner core 4; Through the locking device locking of handle 1, it is sent into air flue through an airway, arriving needs to unlock behind the ablation position; Make inner core 4 rollback gradually through observing bronchoscope and spurring push-pull bar 2; Make multipoint electrode 5 launch to expand ring-type in the shape of a spiral gradually along with inner core 4 continuous rollbacks, this cyclic diameter begins to change gradually, and its diameter variation numerical value can intuitively show through the diameter scale mark 14 of push-pull bar 2; Multipoint electrode 5 until in the form of a ring contacts airway walls (being electrode retaining collar 8 contact airway walls and the suitable adherent pressure of acquisition), through handle 1 push-pull bar 2 is locked; RF ablation device is connect 16 with the external cable of handle 1 to be connected; According to different therapeutic schemes; A plurality of electrodes on the multipoint electrode 5 12 are carried out independent (one by one) switch on or all switch on simultaneously or carry out the interval energising or carry out the order energising in proper order by setting, RF ablation device transmits hyperfrequency, mental retardation, RF energy to airway walls, and the utilization feedback is kept target temperature and continued the some time; After the time that radio frequency continues to set, electrode resets and moves to next therapentic part.The operation reseting procedure carries out repeatedly, to guarantee the seriality of treatment.

Claims

1. annular multiple spot radio-frequency ablation electrode; Comprise handle (1) and push-pull bar (2); It is characterized in that outer multi-lumen tube (3) and handle (1) are affixed; The front end of multipoint electrode (5), front end (6) and inner core (4) is fixed together, and multipoint electrode (5) other end is affixed with outer multi-lumen tube (3) front end, and the rear end of inner core (4) is connected with push-pull bar (2).

2. by the described annular multiple spot radio-frequency ablation electrode of claim 1, it is characterized in that having in the described outer multi-lumen tube (3) one can pass inner core (4) cavity, also have the cavity that can insert multipoint electrode (5) and go between.

3. by claim 1 or 2 described annular multiple spot radio-frequency ablation electrodes; The structure that it is characterized in that described multipoint electrode (5) is that an electrode multi-lumen tube (7) is arranged; One temperature sensor cable passage (9), electrode cable passage (10) and nitinol alloy wire passage (11) are arranged in the electrode multi-lumen tube (7); Electrode multi-lumen tube (7) is arranged with electrode retaining collar (8), and the inwall of electrode retaining collar (8) is provided with electrode (12) and temperature sensor (13).

4. by the described annular multiple spot radio-frequency ablation electrode of claim 3, it is characterized in that the front end surface of described push-pull bar (2) has the corresponding diameter scale mark (14) that shows the diameter of multi-electrode (5).