CN115813398A - Balloon electrode catheter and using method thereof - Google Patents
Balloon electrode catheter and using method thereof Download PDFInfo
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- CN115813398A CN115813398A CN202310127779.2A CN202310127779A CN115813398A CN 115813398 A CN115813398 A CN 115813398A CN 202310127779 A CN202310127779 A CN 202310127779A CN 115813398 A CN115813398 A CN 115813398A
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Abstract
The invention relates to the field of cardiac electrophysiology mapping and ablation, in particular to a balloon electrode catheter and a using method thereof. The invention realizes the overall coverage of the heart atria and the heart ventricles by the retraction and the expansion of the saccule, maintains the pressure after the saccule is formed, ensures that the position of each electrode is fixed, arranges the electrodes in an array manner to realize the acquisition of multi-dimensional electrophysiological signals, acquires the signal between any two adjacent electrodes at the same time during the electrophysiological signal measurement, takes a larger value of the signal to determine the local potential of the area, realizes high-precision mapping, realizes large-area ablation by a plurality of spherical electrodes, improves the ablation efficiency, is suitable for the large-area ablation of a pulsed electric field, and ensures reliable mapping and safe ablation by stable electrode spacing.
Description
Technical Field
The invention belongs to the field of cardiac electrophysiology mapping and ablation, and relates to a medical electrophysiology catheter, in particular to a balloon electrode catheter and a using method thereof.
Background
Pulsed electric field techniques are techniques in which a brief high voltage applied to the tissue can generate a local high electric field of several hundred volts per centimeter that disrupts the cell membrane by creating pores in the cell membrane (the phenomenon of cell membrane becoming "permeabilized"). The application of an electric field at the membrane above the cell threshold causes the pores not to close, and this electroporation is irreversible, thereby allowing the exchange of biomolecular material across the membrane, resulting in cell necrosis or apoptosis.
Because different tissue cells have different threshold values for voltage penetration, the pulse electric field technology can be used for selectively treating the myocardial cells (the threshold value is relatively low) without influencing other non-target point cell tissues (such as nerves, esophagus, blood vessels, blood cells and the like), and meanwhile, because the time for releasing energy is extremely short, the pulse technology can not generate heat effect, thereby avoiding the problems of tissue scabbing, pulmonary vein stenosis and the like.
In the field of cardiac electrophysiology mapping and ablation, mapping electrodes are used for stimulating and mapping electrophysiology activities in the heart, and due to the fact that the physiological structure of the heart of a human body is complex, mapping catheters with different shapes and structures are needed, so that the catheters can accurately reach different focus positions and adapt to the focus positions with different structures. The common catheter that is used for high density mark at present is annular catheter or basket pipe, and annular catheter can only carry out mark electrophysiology signal on a dimension at the same moment, and under the actual conditions, the electrical activity conduction has the directionality, and the electrophysiology signal that awaits measuring has multiple direction, adopts annular catheter, can't detect the mark survey electrophysiology signal of multiple direction, consequently, annular catheter can't the accurate measurement to this regional true electrophysiology signal.
Although the basket catheter can carry out multi-direction mapping in a three-dimensional space after being unfolded, based on the structural characteristics of the basket catheter, the distance between basket arms in the unfolded basket catheter is easy to change due to external pressure, and mapping data are distorted due to deformation, so that electrodes with unfixed distances cannot be used for electrophysiological signal mapping, currently applied pulse ablation releases energy between electrodes, the distance between the two electrodes is required to be fixed, the basket catheter cannot ensure that the distance between the electrodes is fixed, and when the electrodes are too close to each other, a safety problem is easily caused.
Due to the complex structure of the ventricle, the conventional annular catheter or basket catheter cannot enter the ventricle for ablation, and the chordae tendineae tissue is easily damaged by the forced entering, so that the mapping and ablation in the whole heart cavity cannot be realized. The single-point ablation can realize the mapping and ablation in the whole heart cavity, but has the problem of extremely low mapping and ablation efficiency.
The existing annular catheter or basket catheter is easy to deform due to external pressure, so that the contact degree between the electrode and the tissue cannot be accurately measured.
Disclosure of Invention
The invention aims to: aiming at the problems that the current high-density mapping catheter in the prior art cannot completely and truly reflect the electrophysiological signals of the mapping area of the high-density mapping catheter and cannot realize mapping and ablation in the whole heart cavity, the balloon electrode catheter and the use method thereof are provided.
In order to achieve the purpose, the invention adopts the technical scheme that:
in a first aspect, the invention provides a balloon electrode catheter, which comprises a balloon, wherein the balloon can be inflated to form a sphere, can maintain pressure, can also be deflated and furled, a plurality of layers of electrodes are sequentially arranged from a polar part of the balloon to an equator, each layer is provided with a plurality of electrodes, and each layer of electrodes are arranged in an array.
Wherein, the positive and negative electrodes are alternately arranged between the adjacent electrodes.
By adopting the balloon electrode catheter, the heart atria and ventricles can be completely covered by retracting and unfolding the balloon, the pressure is maintained after the balloon is formed, so that the position of each electrode is fixed, then the electrodes arranged in an array mode can realize multi-dimensional electrophysiological signal acquisition, signals between any two adjacent electrodes are acquired at the same time during electrophysiological marking, a larger value of the signals is taken to determine the local potential of the region, the problem of inaccurate signal acquisition caused by the direction relation between the electrode distribution and the electric field is avoided, high-precision marking is realized, large-area ablation can be realized by a plurality of spherical electrodes, the ablation efficiency is improved, the large-area ablation is suitable for pulsed electric field large-area ablation, the marking is more reliable and safer due to the stable electrode spacing, and the balloon electrode catheter is simple in structure, convenient to use and good in effect.
As a preferable technical scheme of the invention, the total surface area of the electrodes in each layer is equal.
By adopting the structure, the electric field distribution is uniform during ablation, and the phenomenon of electric arc or high temperature caused by over concentration on one side is avoided during pulsed electric field ablation.
As a preferable technical solution of the present invention, a distance between the electrode in one layer and an adjacent electrode in an adjacent layer facing the pole part is a, a distance between two adjacent electrodes in each layer is B, and a = B.
By adopting the structure, the axial distance of the electrodes facing to the pole part is equal to the transverse distance of the adjacent electrodes in the same layer, so that the standards are consistent when the electrophysiological signals are acquired, and the mapping accuracy of the electrophysiological signals is improved.
As a preferable technical scheme, the electrode is made of soft precious metal materials, such as gold, silver, platinum, palladium, iridium and alloys of some good electric conductors thereof, so that the electrode is more suitable for spherical arrangement and deformation of the balloon.
As a preferable technical scheme, the electrode is a round or regular polygon thin sheet, and the thin sheet is applied on the balloon.
As a preferable technical solution of the present invention, the balloon includes a balloon body, and the balloon body is made of polyurethane (TPU) or polyvinyl chloride (PVC).
As a further preferable technical solution of the present invention, the bag body is formed by laminating at least two layers.
With this arrangement, after one of the layers is ruptured, the remaining layers can still support the balloon so as not to cause the balloon to leak air, thereby causing the failure of the operation and/or the embolism caused by the instrument.
As a further preferable technical solution of the present invention, the balloon further includes a support tube, the support tube is located in the balloon body, and two ends of the support tube are respectively connected to two poles of the balloon body.
As a further preferable technical solution of the present invention, the balloon is connected to a distal tube body, one end of the support tube is communicated with the distal tube body, and the support tube and the distal tube body are coaxially disposed.
With this arrangement, the balloon is prevented from deflecting by aligning the balloon axial center with the distal tube center.
As a further preferable technical solution of the present invention, a first layer electrode, a second layer electrode, a third layer electrode, and a fourth layer electrode are sequentially provided toward the equator from a pole portion of the balloon far from the distal end tube body, and the electrodes are not provided between the equator and a pole portion of the balloon near the distal end tube body.
With this configuration, all of the electrodes are distributed over the area from the distal end of the balloon to the equator, which is the area where the catheter is actually in contact with the tissue, and which is the area where it is actually effective, so it is only necessary to distribute the electrodes in this area.
As a further preferable technical solution of the present invention, the number of the electrodes in the first layer of electrodes is four to eight, the number of the electrodes in each of the remaining layers is six to ten, and the number of the electrodes in each of the remaining layers is greater than or equal to the number of the electrodes in the first layer of electrodes.
As a further preferable technical solution of the present invention, the electrodes in the second layer of electrodes, the third layer of electrodes and the fourth layer of electrodes are consistent in number and are arranged in one-to-one correspondence.
As a further preferable technical scheme, after the balloon is inflated into a spherical shape, the top end of the balloon is in a plane shape, the first layer of electrodes are arranged on the plane, the rest layers of electrodes are arranged on the spherical surface, and the planar top end can better arrange the first layer of electrodes and be attached to tissues.
As a further preferable technical solution of the present invention, the support tube is a hollow tube body, and at least one air hole penetrating through a wall of the tube is formed in the support tube, and the air hole is used for inflating and deflating the balloon.
As a preferable technical scheme of the invention, the gas filled in the balloon can be dissolved in water, so that the problem of embolism caused by the gas entering the body in an extreme case is prevented.
As a preferable technical scheme of the invention, a pressure sensor is arranged in the saccule and used for detecting pressure change in the saccule.
In a second aspect, the present invention also provides a method of using a balloon electrode catheter, using a balloon electrode catheter as described above, the method comprising the steps of:
the saccule enters the heart cavity to be inflated and formed and maintain pressure;
the electrodes are suspended, and the pressure sensor is set to be zero.
By adopting the using method of the balloon electrode catheter, pressure maintaining is carried out after the balloon is inflated, the electrophysiological signals are low and dull when the electrode is suspended, no external pressure exists, the pressure in the balloon is constant, so that the pressure sensor is convenient to zero, then when the balloon is in contact with the tissue, the gas pressure in the balloon is changed by the contact and contact pressure, the changed pressure value is recorded by the pressure sensor, the contact pressure of the balloon and the tissue can be judged according to the pressure recorded by the pressure sensor, and the contact degree between the electrode and the tissue can be quantified.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. according to the balloon electrode catheter, the heart atria and ventricles can be completely covered by retracting and unfolding the balloons, the position of each electrode is fixed by maintaining pressure after the balloons are formed, then the electrodes arranged in an array mode can realize multi-dimensional electrophysiological signal acquisition, signals between any two adjacent electrodes are acquired at the same time during electrophysiological marking, a larger value of the signals is taken to determine the local potential of the region, the problem of inaccurate signal acquisition caused by the relation between the electrode distribution and the direction of an electric field is avoided, high-precision mapping is realized, large-area ablation can be realized by a plurality of spherical electrodes, the ablation efficiency is improved, the balloon electrode catheter is suitable for large-area ablation of a pulse electric field, and the stable electrode spacing enables mapping to be more reliable and safer;
2. according to the preferred balloon electrode catheter, the total surface area of each layer of electrodes is equal, so that the electric field distribution is uniform during ablation, and the phenomenon of electric arc or high temperature caused by over concentration on one side is avoided during pulsed electric field ablation;
3. in the preferred balloon electrode catheter of the invention, the distance between the electrode in one layer and the adjacent electrode in the adjacent layer facing the pole part is a, the distance between two adjacent electrodes in each layer is B, and a = B, that is, the axial distance between the electrodes facing the pole part is equal to the transverse distance between the adjacent electrodes in the same layer, so that the standards are consistent when the electrophysiological signals are acquired, and the mapping accuracy of the electrophysiological signals is improved;
4. according to the preferred balloon electrode catheter, the balloon body is formed by overlapping at least two layers, and the rest layers can still play a supporting role after one layer is broken, so that operation failure caused by balloon air leakage and/or embolism caused by instruments are avoided;
5. according to the preferred balloon electrode catheter, the balloon is connected with the far-end catheter body, one end of the supporting tube is communicated with the far-end catheter body, the supporting tube and the far-end catheter body are coaxially arranged, the axial center of the balloon is aligned with the center of the far-end catheter body, and the balloon is prevented from deflecting;
6. according to the application method of the balloon electrode catheter, pressure maintaining is carried out after the balloon is inflated, electrophysiological signals are low and dull when the electrode is suspended, no external pressure exists, the pressure in the balloon is constant, so that the pressure sensor is convenient to zero, then when the balloon is in contact with a tissue, the gas pressure in the balloon is changed through the pressure of contact and close contact, the changed pressure value is recorded by the pressure sensor, the pressure of the contact between the balloon and the tissue can be judged according to the pressure recorded by the pressure sensor, and the close contact degree between the electrode and the tissue can be quantified.
Drawings
FIG. 1 is a schematic structural view of a balloon electrode catheter;
FIG. 2 is a first schematic perspective view of a balloon;
FIG. 3 is a schematic perspective view of a balloon;
FIG. 4 is a schematic diagram of a top view of the balloon;
FIG. 5 is a front view of the balloon;
FIG. 6 is a schematic plan view of the balloon;
fig. 7 is a schematic cross-sectional view of the balloon.
The labels in the figure are: 1-balloon, 2-first layer electrode, 3-second layer electrode, 4-third layer electrode, 5-fourth layer electrode, 6-distal tube, 7-equator, 8-support tube, 9-pressure sensor, 10-proximal tube, 11-balloon, 12-control handle, 13-gas channel, 14-first gas hole, 15-second gas hole, 16-third gas hole.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in fig. 1 to 7, the balloon electrode catheter of the present invention includes a balloon 1, a distal tube 6, a proximal tube 10 and a control handle 12.
As shown in fig. 1, the balloon 1 is connected to one end of the distal tube 6, the other end of the distal tube 6 is connected to one end of the proximal tube 10, and the other end of the proximal tube 10 is connected to the control handle 12, wherein the distal tube 6, the proximal tube 10 and the control handle 12 are mature products in the prior art, the distal tube 6 is flexible and can be bent under the control of the control handle 12 to reach different tissue sites, the proximal tube 10 is made of a braided tube with high torque, and the distance of the tubes is determined by the positions of the tubes relative to the control handle 12.
The balloon 1 can be inflated to form a spherical shape, maintain pressure and also be deflated and furled; specifically, as shown in fig. 7, the balloon 1 includes a balloon body 11 and a support tube 8, the balloon body 11 is made of polyurethane (TPU) or polyvinyl chloride (PVC), the support tube 8 is made of a material with a certain rigidity, the support tube 8 is located in the balloon body 11, two ends of the support tube 8 are respectively connected to two poles of the balloon body 11, the support tube 8 is a hollow tube body, at least one air hole penetrating through a tube wall is formed in the support tube 8, the air hole is used for inflating and deflating the balloon body 11, a first air hole 14, a second air hole 15 and a third air hole 16 are sequentially formed in the support tube 8 from far to near and near the far-end tube body 6, the first air hole 14 and the third air hole 16 are respectively close to two poles of the balloon body 11, and the second air hole 15 is located in the middle of the balloon body 11.
The balloon 11 is connected to the distal tube body 6, one end of the supporting tube 8 is communicated with the distal tube body 6, and the supporting tube 8 is coaxially arranged with the distal tube body 6, so that the axial center of the balloon 1 is aligned with the center of the distal tube body 6, and the balloon 1 is prevented from deflecting; as shown in fig. 1 and 7, a gas passage 13 is provided in the control handle 12, the gas passage 13 is connected to the support tube 8 along the proximal tube body 10 and the distal tube body 6, a port of the gas passage 13 is provided at a tail portion of the control handle 12, and gas can be delivered or recovered to an interior of the balloon 11 through the gas passage 13, so that the balloon 11 is inflated to form a spherical shape or deflated to fold into and out of the sheath tube.
In a specific embodiment, an air compressor connected to the gas channel 13 can maintain pressure, so that the balloon 1 maintains pressure to maintain the spherical shape without deformation.
In a specific embodiment, an air flow switch is arranged on the control handle 12, and after the balloon 1 is inflated and formed, the air flow switch is closed so that the balloon 1 maintains pressure and maintains a spherical shape without deformation.
In a particular embodiment, the bladder 11 is formed by laminating at least two layers; with this arrangement, after one of the layers is ruptured, the remaining layers can still support the balloon so as not to cause the balloon 1 to leak air, which may result in failure of the operation and/or embolism caused by the instrument.
In a particular embodiment, the gas filled in the balloon 1 is capable of dissolving rapidly in water, such as NO 2 Etc. to prevent the occurrence of embolism problems in the body from the entry of gas in extreme cases.
As shown in fig. 2 to 6, a plurality of layers of electrodes are sequentially arranged from the polar part of the balloon 1 to the equator 7 (indicated by dotted lines, which is not true in the figures), each layer is provided with a plurality of electrodes, each layer of electrodes is arranged in an array, and positive electrodes and negative electrodes are alternately arranged between adjacent electrodes; in particular, the electrodes are made of a soft-textured noble metal material, such as gold, silver, platinum, palladium, iridium and alloys of some good electrical conductors thereof, so as to make them more suitable for spherical arrangement and for deformation of the balloon 1, and are circular or regular polygonal thin sheets applied on the balloon 1; in this embodiment, the electrodes are square gold sheets with a micron-sized thickness.
In a specific embodiment, the total surface area of the electrodes in each layer is equal; by adopting the structure, the electric field distribution is uniform during ablation, and the phenomenon of electric arc or high temperature caused by over concentration on one side is avoided during pulsed electric field ablation.
In a specific embodiment, as shown in fig. 5, the distance between the electrode in one layer and the adjacent electrode in the adjacent layer facing the pole part is a, the distance between two adjacent electrodes in each layer is B, and a = B; by adopting the structure, the axial distance of the electrodes facing to the pole part is equal to the transverse distance of the adjacent electrodes in the same layer, so that the standards are consistent when the electrophysiological signals are acquired, and the mapping accuracy of the electrophysiological signals is improved.
As an example of the present invention, as shown in fig. 2, 3 and 6, a first layer electrode 2, a second layer electrode 3, a third layer electrode 4 and a fourth layer electrode 5 are provided in this order toward the equator 7 from the pole of the balloon 1 which is far from the distal tube body 6, and the electrodes are not provided between the equator 7 and the pole of the balloon 1 which is close to the distal tube body 6; with this configuration, all the electrodes are distributed over the area from the distal end of the balloon 1 to the equator 7, which is the area where the catheter is in actual contact with the tissue, and which is the area where it is really effective, so that it is only necessary to distribute the electrodes in this area.
The number of the electrodes in the first layer of electrodes 2 is four to eight, the number of the electrodes in each remaining layer is six to ten, the number of the electrodes in each remaining layer is greater than or equal to the number of the electrodes in the first layer of electrodes 2, and the number of the electrodes in the second layer of electrodes 3, the number of the electrodes in the third layer of electrodes 4 and the number of the electrodes in the fourth layer of electrodes 5 are consistent and are arranged in a one-to-one correspondence manner; in this embodiment, the number of the first layer electrodes 2 is eight, and the number of the electrodes in the remaining layers is ten, and the electrodes are all arranged in an annular array.
As shown in fig. 5 and 6, after the balloon 1 is inflated into a spherical shape, the top end of the balloon is planar, the first layer of electrodes 2 is arranged on a plane, each of the other layers is arranged on a spherical surface, and the planar top end can better arrange the first layer of electrodes 2 and attach to tissues.
A pressure sensor 9 is arranged in the balloon 1, and the pressure sensor 9 is used for detecting pressure change in the balloon 1; in particular, as shown in fig. 7, the pressure sensor 9 is arranged on the support tube 8, and the pressure sensor 9 may also be arranged on the inner surface of the capsule 11.
According to the balloon electrode catheter, the atrium and the ventricle of the heart can be completely covered by retracting and unfolding the balloon 1.
According to the balloon electrode catheter, after the balloon 1 is molded, pressure is maintained, so that the position of each electrode is fixed, and then the electrodes arranged in an array mode can achieve multi-dimensional electrophysiological signal acquisition.
According to the balloon electrode catheter, signals between any two adjacent electrodes are collected at the same time during electrophysiological marking, and a larger value of the signals is taken to determine the local potential of the region, so that the problem of inaccurate signal collection caused by the relation between the distribution of the electrodes and the direction of an electric field is avoided (for example, when the direction of the electric field is parallel to the two electrodes, the electric signals collected by the two electrodes are very weak, so that the region is judged to be a low-voltage region by mistake, and the problem can be effectively avoided by the arrangement of the electrodes and the signal collection in an array manner), so that high-precision marking is realized.
The balloon electrode catheter is multiple in spherical surface, large-area ablation can be achieved through the electrodes, ablation efficiency is improved, and the balloon electrode catheter is suitable for large-area ablation of a pulse electric field.
According to the balloon electrode catheter, the stable electrode distance enables mapping to be more reliable and ablation to be safer.
The sacculus electrode catheter of this embodiment, simple structure, convenient to use, it is respond well.
Example 2
As shown in fig. 1 to 7, a method for using a balloon electrode catheter according to the present invention, which uses the balloon electrode catheter according to embodiment 1, includes the following steps:
the saccule 1 enters the heart cavity to be inflated and formed and maintain pressure;
the electrodes are suspended, and the pressure sensor 9 is set to zero;
the pressure sensor 9 detects a change in pressure when the balloon 1 is in contact with tissue.
According to the using method of the balloon electrode catheter, as the balloon 1 is pressurized after being inflated, the electrophysiological signals are low and dull when the electrode is suspended, no external pressure exists, the pressure in the balloon 1 is constant, so that the pressure sensor 9 is convenient to zero, then when the balloon 1 is in contact with the tissue, the gas pressure in the balloon 1 is changed by the contact and close pressure, the changed pressure value is recorded by the pressure sensor 9, the pressure of the balloon 1 in contact with the tissue can be judged according to the pressure recorded by the pressure sensor 9, and the close degree between the electrode and the tissue can be quantified.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (17)
1. The utility model provides a sacculus electrode catheter, its characterized in that includes sacculus (1), sacculus (1) can be aerifyd and form sphere and pressurize, also can deflate and draw in, by the utmost point portion of sacculus (1) is equipped with a plurality of layers of electrode to equator (7) in proper order, and every layer has a plurality of the electrode, and every layer the electrode is the array setting.
2. A balloon electrode catheter according to claim 1, wherein the total surface area of the electrodes of each layer is equal.
3. A balloon electrode catheter according to claim 1, wherein the distance between the electrodes in one layer and adjacent ones of the electrodes in adjacent layers towards the pole portion is a, the spacing between adjacent two of the electrodes in each layer is B, and a = B.
4. The balloon electrode catheter according to claim 1, wherein the electrodes are made of a soft noble metal material.
5. A balloon electrode catheter according to claim 1, characterized in that the electrodes are circular or regular polygonal sheets applied on the balloon (1).
6. The balloon electrode catheter as recited in claim 1, characterized in that the balloon (1) comprises a balloon (11), and the balloon (11) is made of polyurethane or polyvinyl chloride.
7. The balloon electrode catheter according to claim 6, wherein the balloon (11) is formed by laminating at least two layers.
8. The balloon electrode catheter as recited in claim 6, characterized in that the balloon (1) further comprises a support tube (8), the support tube (8) is located inside the balloon (11), and both ends of the support tube (8) are respectively connected with two poles of the balloon (11).
9. The balloon electrode catheter according to claim 8, wherein the balloon (1) is connected to a distal tube body (6), one end of the support tube (8) communicates with the distal tube body (6), and the support tube (8) is disposed coaxially with the distal tube body (6).
10. The balloon electrode catheter according to claim 9, characterized in that the first layer of electrodes (2), the second layer of electrodes (3), the third layer of electrodes (4) and the fourth layer of electrodes (5) are arranged in sequence from the pole of the balloon (1) distal from the distal tube body (6) towards the equator (7), the electrodes not being arranged between the equator (7) towards the pole of the balloon (1) proximal to the distal tube body (6).
11. The balloon electrode catheter according to claim 10, wherein the number of the electrodes in the first layer of electrodes (2) is four to eight, the number of the remaining electrodes in each layer is six to ten, and the number of the remaining electrodes in each layer is greater than or equal to the number of the electrodes in the first layer of electrodes (2).
12. The balloon electrode catheter according to claim 11, wherein the electrodes of the second layer of electrodes (3), the third layer of electrodes (4) and the fourth layer of electrodes (5) are in a consistent number and are arranged in a one-to-one correspondence.
13. The balloon electrode catheter according to claim 10, wherein the balloon (1) is inflated into a spherical shape, the top end of the balloon is planar, the first layer of electrodes (2) is arranged on the plane, and each of the other layers is arranged on a spherical surface.
14. The balloon electrode catheter as claimed in claim 8, wherein the support tube (8) is a hollow tube body provided with at least one air hole penetrating the wall of the tube.
15. The balloon electrode catheter according to claim 1, wherein the gas filled in the balloon (1) is soluble in water.
16. A balloon electrode catheter according to any of claims 1-15, characterized in that a pressure sensor (9) is arranged in the balloon (1).
17. A method of using a balloon electrode catheter, using the balloon electrode catheter of claim 16, comprising the steps of:
the saccule (1) enters the heart cavity to be inflated and formed and maintain pressure;
the electrodes are suspended, and the pressure sensor (9) is set to zero.
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