CN202497235U - Diameter variable basket radiofrequency ablation electrode - Google Patents

Abstract

The utility model discloses a diameter variable basket radiofrequency ablation electrode which can adjust and control basket diameter so that an electrode obtains appropriate adherence pressure. The diameter variable basket radiofrequency ablation electrode comprises a handle (1) and a push-pull rod (2). In particular, the rear end of a spring (3) is fixedly connected with the handle (1). One end of multiple electrode wires (5) and a rear terminal (4) are fixedly connected with the front end of the spring (3). The other end of the multiple electrode wires (5) and a front terminal (6) are fixedly connected with the front end of a multi-strand inner core (7). The rear end of the multi-strand inner core (7) is fixedly connected with the push-pull rod (2). The spring (3) surrounds the multi-strand inner core (7). The multiple electrode wires (5) are shaped as a basket.

Description

Variable-diameter basket radio-frequency ablation electrode

Technical field:

This utility model belongs to medical apparatus and instruments, specifically is a kind of variable-diameter basket 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, comprises that airway walls thickens, mucous gland and goblet cell increases, blood vessel hyperplasia, 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.Except that this mechanical effect, airway smooth muscle is also participated in the airway inflammation reaction through secrete cytokines, change periplast composition, three kinds of mechanism of combination inflammatory cell.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, and it is the first step of treatment asthma that application beta receptor agonist makes bronchodilatation.In year, induction type anti-inflammatory agent (comprising glucocorticoid) and long acting beta agonists were the main medicines of severe asthma in the treatment surplus past ten, 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.At present; Have the report that radio-frequency ablation technique is used to treat the airways in humans disease abroad, this technology can reduce airway smooth muscle quantity, thereby makes the invalid asthmatic patient remission of general treatment; Acute exacerbation reduces; But ablating electrode can only melt in pointwise, can not guarantee the ablation line seriality, causes operation not thorough.

Summary of the invention:

The goal of the invention of this utility model is to disclose a kind of variable-diameter basket radio-frequency ablation electrode that the basket diameter makes the suitable adherent pressure of electrode acquisition of adjusting and control.

The technical solution that realizes this utility model is following: comprise handle and push-pull bar; Key is that spring rear end and handle are affixed; Many wire electrode one ends, follower head and spring front ends are affixed, and many wire electrode other ends, front end and multiply inner core front ends are affixed, and multiply inner core rear end and push-pull bar are affixed; Ring spring is around the multiply inner core, and many wire electrodes become the basket shape.

Be provided with temperature sensor in the inner chamber of described front end, the lead-in wire of temperature sensor and multiply inner core are parallel draws, and many wire electrode one ends are fixed in the outer shroud intracavity of front end.

The basket shape of described many wire electrode spirality.

Described spring has insulating barrier outward.

The front end surface of described push-pull bar has the diameter scale mark of indicating electrode filament diameter size.

This utility model is through adjustment and control basket diameter; Make the bronchus of electrode pair different thicknesses all obtain the adherent pressure that suits; Thereby the assurance radio system is constant relatively to the tracheal wall impedance, makes radio frequency output energy stabilization, has guaranteed the radiofrequency ablation therapy effect.

Description of drawings:

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

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

Fig. 3 is the sectional schematic diagram of A-A position among Fig. 2.

Fig. 4 is the cutaway view of follower head part among Fig. 1.

The specific embodiment:

See also Fig. 1～Fig. 4; The specific embodiment of this utility model is following: handle 1, push-pull bar 2 are processed (like polyurethanes) for medical macromolecular materials; Push-pull bar 2 can carry out displacement in handle 1, the front end surface of push-pull bar 2 has the diameter scale mark 10 of indicating electrode silk 5 diameter, and the rear end of the front end of handle 1 and spring 3 is affixed; The front end of many wire electrode 5 one ends, follower head 4 and springs 3 is welded as a whole; The other end of many wire electrodes 5, front end 6 and multiply inner core 7 front ends are welded as a whole, and multiply inner core 7 rear ends and push-pull bar 2 are fixed together, and push-pull bar 2 tail ends have external cable to connect 12; Spring 3 is around multiply inner core 7,5 one-tenth basket shapes of many wire electrodes; Handle 1 is processed (like polyurethanes) with push-pull bar 2 for medical macromolecular materials; Push-pull bar 2 places in the handle 1 and can in handle 1, carry out displacement; The rear end of the front end of handle 1 and spring 3 is affixed; The front end of spring 3 is connected with a follower head 4 (shown in Figure 4), and follower head 4 is the hollow tube of metal material, and an end of follower head 4 and the front end of spring 3 are welded as a whole; Spring 3 is built-in with a multiply inner core 7; Multiply inner core 7 forms (shown in Figure 3) by a nitinol alloy wire and Duo Gen high-conductive metal skein silk thigh; Or also can be single to constitute real cored structure; The rear end of multiply inner core 7 and push-pull bar 2 are fixed together, and the front end of multiply inner core 7 stretches out a segment length and affixed with front end 6 in the follower head 4 of spring 3 front ends, through push-pull bar 2 multiply inner core 7 are moved in spring 3 and follower head 4; Spring 3 surfaces are coated with insulating barrier 9 (shown in Figure 1), and spring 3 can be participated in conduction or non-conductive; Front end 6 is metal material (shown in Figure 2); It has an inner chamber and end to be hemispherical; Temperature sensor 8 places this inner chamber and is solidificated in the front end 6 with heat-conducting glue; Multiply inner core 7 two bursts of dismountings wherein with the passage as the lead-in wire 11 of temperature sensor 8, are then gone between and 11 parallelly with multiply inner core 7 draw and be connected with the external cable interface 12 of handle 1; Wire electrode 5 is set to 4～12 (the best is 6～8); Every wire electrode 5 is all by prefabricated helical annular or two ends formation certain angle and pars intermedia and parallel axes formation trapezoidal shape for rotating to an angle around multiply inner core 7 axis; Many wire electrodes 7 are uniformly distributed with by inner core 7 axis; Front end 6 with an end of many wire electrodes 5 be fixed in front end 6 the outer shroud intracavity and with the front end of multiply inner core 7 be fixed together (shown in Figure 2); The other end of many wire electrodes 5 then with follower head 4 affixed (shown in Figure 4), many wire electrodes 7 form the basket or trapezoidal basket shape of spiral net when launching.During use, promote push-pull bar 2 forward earlier, multiply inner core 7 stretches out forward; Along with multiply inner core 7 constantly stretches out forward; The drive of stretching out forward owing to inner core 4 of the many wire electrodes 5 of basket shape changes diameter in the shape of a spiral, is coaxial linear state until many wire electrodes 5 and multiply inner core 7, through the locking device locking of handle 1; Again it is sent into air flue through bronchial catheter; Arriving needs to unlock behind the ablation position, makes multiply inner core 7 rollback gradually through observing bronchoscope and spurring push-pull bar 2, makes many wire electrodes 5 launch expansion gradually along with multiply inner core 7 continuous rollbacks and is the basket ring-type; The cyclic diameter of this basket also begins to change gradually; The diameter scale mark 10 that the numerical value of the cyclic diameter of basket passes through push-pull bar 2 shows that intuitively wire electrode 5 contact airway walls and the suitable adherent pressure of acquisition until in the form of a ring lock push-pull bar 2 through handle 1; Radiofrequency generator is connected with external cable interface 12, many wire electrodes 5 are switched on, radiofrequency generator transmits hyperfrequency, mental retardation, RF energy to airway walls; The variations in temperature of temperature sensor 8 front monitoring front-end heads 6; Utilize feedback to keep target temperature and continue 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 (5)

1. variable-diameter basket radio-frequency ablation electrode; Comprise handle (1) and push-pull bar (2), it is characterized in that spring (3) rear end and handle (1) are affixed, many wire electrode (5) one ends, follower head (4) and spring (3) front ends are affixed; Many wire electrodes (5) other end, front end (6) and multiply inner core (7) front end are affixed; Multiply inner core (7) rear end and push-pull bar (2) are affixed, and spring (3) is around multiply inner core (7), and many wire electrodes (5) become the basket shape.

2. by the described variable-diameter basket of claim 1 radio-frequency ablation electrode; It is characterized in that being provided with temperature sensor (8) in the inner chamber of described front end (6); The lead-in wire (11) of temperature sensor (8) is drawn with multiply inner core (7) is parallel, and many wire electrode (5) one ends are fixed in the outer shroud intracavity of front end (6).

3. by claim 1 or 2 described variable-diameter basket radio-frequency ablation electrodes, it is characterized in that the basket shape of described many wire electrodes (5) spirality.

4. by the described variable-diameter basket of claim 3 radio-frequency ablation electrode, it is characterized in that insulating barrier (9) is arranged outside the described spring (3).

5. by the described variable-diameter basket of claim 4 radio-frequency ablation electrode, the front end surface that it is characterized in that described push-pull bar (2) has the diameter scale mark (10) of indicating electrode silk (5) diameter.

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