CN111513841A - Magnetic navigation radio frequency and injection combined ablation flexible catheter - Google Patents

Magnetic navigation radio frequency and injection combined ablation flexible catheter Download PDF

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Publication number
CN111513841A
CN111513841A CN202010331138.5A CN202010331138A CN111513841A CN 111513841 A CN111513841 A CN 111513841A CN 202010331138 A CN202010331138 A CN 202010331138A CN 111513841 A CN111513841 A CN 111513841A
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injection
ablation
radio frequency
cavity
tube
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卢才义
陈越猛
张新龙
张煊浩
于晓丰
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Shaoxing Mayo Heart Magnetism Medical Technology Co ltd
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Shaoxing Mayo Heart Magnetism Medical Technology Co ltd
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14—Probes or electrodes therefor
    • A61B18/1492—Probes or electrodes therefor having a flexible, catheter-like structure, e.g. for heart ablation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
    • A61B34/20—Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
    • A61B5/25—Bioelectric electrodes therefor
    • A61B5/279—Bioelectric electrodes therefor specially adapted for particular uses
    • A61B5/28—Bioelectric electrodes therefor specially adapted for particular uses for electrocardiography [ECG]
    • A61B5/283—Invasive
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
    • A61B5/6847—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive mounted on an invasive device
    • A61B5/6852—Catheters
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
    • A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
    • A61B5/6867—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive specially adapted to be attached or implanted in a specific body part
    • A61B5/6869—Heart
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00315—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for treatment of particular body parts
    • A61B2018/00345—Vascular system
    • A61B2018/00351—Heart
    • A61B2018/00357—Endocardium
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00315—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for treatment of particular body parts
    • A61B2018/00345—Vascular system
    • A61B2018/00351—Heart
    • A61B2018/00363—Epicardium
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
    • A61B2018/00577—Ablation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00636—Sensing and controlling the application of energy
    • A61B2018/00773—Sensed parameters
    • A61B2018/00839—Bioelectrical parameters, e.g. ECG, EEG
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
    • A61B34/20—Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
    • A61B2034/2046—Tracking techniques

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Abstract

The invention discloses a magnetic navigation radio frequency and injection combined ablation flexible catheter, which comprises: the magnetic navigation radio frequency ablation tube is provided with a radio frequency catheter cavity which is communicated along the axial direction; the injection ablation tube is provided with an injection catheter cavity which is communicated along the axial direction, and the injection ablation tube is movably arranged in the radio frequency catheter cavity. The invention can be applied to both radio frequency ablation and injection ablation so as to treat arrhythmia focus with different depth and improve the success rate of the operation.

Description

Magnetic navigation radio frequency and injection combined ablation flexible catheter
Technical Field
The invention relates to the technical field of medical instruments, in particular to a magnetic navigation radio frequency and injection combined ablation flexible catheter.
Background
Catheter radiofrequency ablation is an interventional technique for treating most types of arrhythmia, and has the advantages of high success rate, small wound, quick recovery, repeated operation and the like. However, due to the limitation of the radio frequency ablation treatment principle, the success rate of the endomyocardial ablation is low, the recurrence rate is high, and the complications are many for arrhythmia focus located in the deep part of the heart wall, epicardium and other parts. Although the method of epicardial ablation can be adopted for remedy, the method also has the defects of needing to puncture the pericardial cavity, being difficult to operate, being easy to damage epicardial vessels and nerves and the like, and has limited clinical popularization and application. While the endocardial injection catheter is mainly used for the trans-endocardial gene therapy, it is rarely used for the treatment of arrhythmia. No catheter can simultaneously perform radiofrequency ablation and injection ablation clinically.
Disclosure of Invention
The embodiment of the invention provides a magnetic navigation radio frequency and injection combined ablation flexible catheter, which is used for solving the problem that the radio frequency ablation and the injection ablation cannot be simultaneously completed in the prior art.
A magnetically navigated radio frequency and injection combined ablation flexible catheter according to an embodiment of the present invention comprises:
the magnetic navigation radio frequency ablation tube is provided with a radio frequency catheter cavity which is communicated along the axial direction;
the injection ablation tube is provided with an injection catheter cavity which penetrates along the axial direction, and the injection ablation tube is movably arranged in the radio frequency catheter cavity.
According to some embodiments of the invention, the magnetically navigated radiofrequency ablation tube comprises:
the end electrode comprises an inner cylinder, an outer cylinder, a first connecting plate and a second connecting plate, the inner cylinder is sleeved in the outer cylinder and is spaced from the outer cylinder, one end of the inner cylinder is connected with one end of the outer cylinder through the first connecting plate, the other end of the inner cylinder is connected with the other end of the outer cylinder through the second connecting plate, a first radio frequency cavity is defined by the inner peripheral wall of the inner cylinder, a closed cavity is defined by the outer peripheral wall of the inner cylinder, the inner peripheral wall of the outer cylinder, the first connecting plate and the second connecting plate, the outer cylinder is provided with a plurality of through saline holes, and the first connecting plate is provided with an end electrode lead connector and a through first saline channel;
the ablation catheter body comprises a second radio-frequency cavity, a second saline passage, a first wire passage, a second wire passage and a third wire passage, one axial end of the ablation catheter body is connected with the first connecting plate, the second radio-frequency cavity is communicated with the first radio-frequency cavity to form the radio-frequency catheter cavity, the second saline passage is communicated with the first saline passage, and one end of the first wire passage extends towards the end electrode wire connector;
the ring electrode is sleeved outside the ablation tube body, and one end of the second lead channel extends towards the ring electrode;
the magnet ring is sleeved outside the ablation tube body, and one end of the third wire channel extends towards the magnet ring.
In some embodiments of the invention, the cross-section of the ablation tube body is circular with a diameter of 2 mm or more; and/or the presence of a gas in the gas,
the cross section of the inner cylinder is circular with the diameter more than or equal to 0.5 mm.
In some embodiments of the invention, the central axis of the second rf cavity is collinear with the central axis of the ablation catheter body, and the cross-section of the second rf cavity is circular with a diameter of 1.6 mm or more.
In some embodiments of the present invention, the number of the ring electrodes is multiple, the number of the second wire channels is multiple, and the second wire channels correspond to the plurality of ring electrodes one to one; and/or the presence of a gas in the gas,
the magnet rings are multiple, the third wire channels are multiple, and the third wire channels correspond to the magnet rings one to one.
In some embodiments of the invention, the injection ablation tube comprises:
the injection tube body is provided with a first injection cavity which penetrates through the injection tube body along the axial direction, the injection tube body is movably arranged in the second radio frequency cavity in a penetrating mode, and the first connecting plate is suitable for stopping the injection tube body;
the injection needle is provided with a second injection cavity which penetrates through the injection needle in the axial direction, one end of the injection needle is connected with one end of the injection tube body in a sealing mode, the second injection cavity is communicated with the first injection cavity to form the injection catheter cavity, and the injection needle movably penetrates through the first radio frequency cavity.
Further, when one end of the injection tube body abuts against the first connecting plate, the length of the other end of the injection needle exceeding the first radio frequency cavity is larger than or equal to 1 millimeter.
According to some embodiments of the invention, the magnetic navigated radiofrequency ablation tube and the injection ablation tube are both flexible members.
According to some embodiments of the invention, the magnetic navigated radiofrequency and injection combined ablation flexible catheter further comprises:
and the sealing element is arranged between the magnetic navigation radiofrequency ablation tube and the injection ablation tube so as to seal a gap between the magnetic navigation radiofrequency ablation tube and the injection ablation tube.
According to some embodiments of the invention, the magnetic navigated radiofrequency and injection combined ablation flexible catheter further comprises:
and the stopper is arranged between the magnetic navigation radiofrequency ablation tube and the injection ablation tube and used for limiting the relative position between the magnetic navigation radiofrequency ablation tube and the injection ablation tube.
The embodiment of the invention can be applied to both radio frequency ablation and injection ablation so as to treat arrhythmia focuses with different depths and improve the success rate of the operation.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. In the drawings:
FIG. 1 is a schematic structural view of a magnetic navigation RF and injection combined ablation flexible catheter in an embodiment of the invention;
FIG. 2 is a schematic structural view of a magnetically navigated RF ablation catheter in an embodiment of the present disclosure;
FIG. 3 is a schematic structural diagram of a terminal electrode according to an embodiment of the present invention;
FIG. 4 is a schematic view of an ablation catheter body in accordance with an embodiment of the invention;
FIG. 5 is a schematic structural view of a magnetic navigation RF and injection combined ablation flexible catheter in an embodiment of the invention;
FIG. 6 is a cross-sectional cut-away view of a magnetically navigated radiofrequency and injection combined ablation flexible catheter in an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of an injection ablation tube in an embodiment of the invention;
FIG. 8 is a cross-sectional cut-away view of a magnetically navigated radiofrequency and injection combined ablation flexible catheter in an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
As shown in fig. 1, a magnetic navigation radiofrequency and injection combined ablation flexible catheter 1 according to an embodiment of the present invention comprises: a magnetically navigated radiofrequency ablation tube 10 and an infusion ablation tube 20. The magnetically navigated radiofrequency ablation tube 10 has a radiofrequency catheter lumen 100 running axially therethrough. The syringe ablation tube 20 is movably disposed within the radiofrequency catheter lumen 100. For example, the syringe ablation tube 20 may be fitted into the rf catheter lumen 100, and the syringe ablation tube 20 may be moved back and forth along the axis of the magnetically navigated rf ablation tube 10. The injection ablation tube 20 has an injection catheter lumen 200 running axially therethrough. The infusion catheter lumen 200 may be used for infusion of an infusion.
By adopting the embodiment of the invention, the magnetic navigation radiofrequency ablation tube 10 and the injection ablation tube 20 are assembled together, so that the catheter can be applied to both radiofrequency ablation surgery and injection ablation surgery, is suitable for treating arrhythmia focuses with different depths, improves the success rate of the surgery, and has simple structure and easy operation.
On the basis of the above-described embodiment, various modified embodiments are further proposed, and it is to be noted herein that, in order to make the description brief, only the differences from the above-described embodiment are described in the various modified embodiments.
As shown in fig. 2, 5 and 6, according to some embodiments of the present invention, a magnetically navigated radiofrequency ablation tube 10 includes: a tip electrode 110, an ablation catheter body 120, a ring electrode 130, and a magnet ring 140.
As shown in fig. 3, the terminal electrode 110 includes an inner cylinder 111, an outer cylinder 112, a first connection plate 113, and a second connection plate 114. The inner cylinder 111 is inserted into the outer cylinder 112 and spaced apart from the outer cylinder 112, one end of the inner cylinder 111 is connected to one end of the outer cylinder 112 through a first connection plate 113, and the other end of the inner cylinder 111 is connected to the other end of the outer cylinder 112 through a second connection plate 114. The inner peripheral wall of the inner barrel 111 defines a first rf cavity 115. The outer peripheral wall of the inner cylinder 111, the inner peripheral wall of the outer cylinder 112, the first connection plate 113, and the second connection plate 114 define a closed cavity, the outer cylinder 112 is provided with a plurality of through-going saline holes 116, and the first connection plate 113 is provided with a terminal electrode lead connector 117 and a through-going first saline passage 118.
For example, the first connecting plate 113 and the second connecting plate 114 are both ring-shaped. A radially inner end of the first connection plate 113 is connected to one end of the inner cylinder 111, and a radially outer end of the first connection plate 113 is connected to one end of the outer cylinder 112. The radially inner end of the second connecting plate 114 is connected to the other end of the inner cylinder 111, and the radially outer end of the second connecting plate 114 is connected to the other end of the outer cylinder 112.
As shown in fig. 4, the ablation tube body 120 includes a second rf lumen 121, a second saline passageway 122, a first lead passageway 123, a second lead passageway 124, and a third lead passageway 125. An axial end of the ablation catheter body 120 is connected to the first connector plate 113, the second rf lumen 121 communicates with the first rf lumen 115 to form the rf catheter lumen 100, the second saline passageway 122 communicates with the first saline passageway 118, and an end of the first wire passageway 123 extends toward the tip electrode wire connector 117. The first wire in the first wire passage 123 is electrically connected to the terminal electrode wire connection 117.
As shown in fig. 5-6, the ring electrode 130 is disposed externally to the ablation catheter body 120. One end of the second wire passage 124 extends toward the ring electrode 130. The second wire in the second wire passage 124 is electrically connected to the ring electrode 130.
As shown in fig. 5-6, a magnet ring 140 is provided around the ablation tube body 120. One end of the third wire passage 125 extends toward the magnet ring 140. The third wire in the third wire passage 125 is electrically connected to the magnet ring 140.
As shown in fig. 1-2, in some embodiments of the invention, the inner barrel 111 includes a straight segment and a flared segment, one end of the straight segment is connected to the other end of the flared segment, the other end of the straight segment is connected to the second connecting plate 114, and one end of the flared segment is connected to the first connecting plate 113. The aperture of the flared section increases gradually from the other end of the flared section to one end of the flared section.
In other embodiments of the present invention, as shown in FIG. 3, the bore diameter of the inner barrel 111 is constant from one end of the inner barrel 111 to the other end of the inner barrel 111.
In some embodiments of the present invention, the cross-section of the inner barrel 111 is circular with a diameter of 0.5mm or more.
In some embodiments of the present invention, the cross-section of the ablation tube body 120 is circular with a diameter of 2 mm or more.
As shown in fig. 4, in some embodiments of the present invention, the central axis of the second rf lumen 121 is collinear with the central axis of the ablation catheter body 120.
In some embodiments of the present invention, the cross-section of the second rf cavity 121 is circular with a diameter of 1.6 mm or more.
As shown in fig. 5-6, in some embodiments of the present invention, there are a plurality of ring electrodes 130, a plurality of second wire channels 124, and a one-to-one correspondence between the plurality of second wire channels 124 and the plurality of ring electrodes 130. Further, the number of the ring electrodes 130 may be an odd number, and one of the ring electrodes 130 is suitable for being used with the terminal electrode 110.
As shown in fig. 5-6, in some embodiments of the present invention, there are a plurality of magnet rings 140, a plurality of third wire channels 125, and a plurality of third wire channels 125 corresponding to the plurality of magnet rings 140.
As shown in fig. 7, in some embodiments of the present invention, the syringe ablation tube 20 comprises: syringe body 210 and injection needle 220.
As shown in fig. 1 and 7, the injection tube body 210 has a first injection cavity 211 penetrating axially, the injection tube body 210 is movably disposed through the second rf cavity 121, and the first connecting plate 113 is adapted to stop the injection tube body 210. It will be appreciated that the aperture of the second rf cavity 121 is larger than the aperture of the first rf cavity 115. The cross-sectional dimension of the syringe body 210 is smaller than the aperture of the second rf cavity 121, and the syringe body 210 is adapted to fit into the second rf cavity 121 and can move back and forth in the second rf cavity 121. The cross-sectional dimension of syringe body 210 is larger than the bore diameter of first rf cavity 115, and syringe body 210 cannot extend into first rf cavity 115.
As shown in fig. 1 and 7, the injection needle 220 has a second injection cavity 221 extending therethrough in the axial direction. One end of the injection needle 220 is hermetically connected to one end of the injection tube body 210, and the second injection cavity 221 communicates with the first injection cavity 211 to form the injection catheter cavity 200. An injection needle 220 is movably disposed through the first rf cavity 115. It will be appreciated that the cross-sectional dimension of the needle 220 is smaller than the bore of the first rf cavity 115, and that the needle 220 is adapted to fit within the first rf cavity 115 and can move back and forth within the first rf cavity 115.
Further, when one end of the syringe body 210 abuts against the first connecting plate 113, the length of the other end of the syringe needle 220 beyond the first rf cavity 115 is greater than or equal to 1 mm. It will be appreciated that the axial length of the needle 220 is greater than the axial length of the tip electrode 110 by a length of 1 mm or more.
According to some embodiments of the present invention, the magnetic navigated radiofrequency ablation tube 10 and the injection ablation tube 20 are both flexible members. Therefore, the safety of the magnetic navigation radio frequency and injection combined ablation flexible catheter 1 applied to the operation can be improved.
As shown in fig. 8, the magnetic navigated radiofrequency and injection combination ablation flexible catheter 1 further comprises a seal 30, according to some embodiments of the present invention. The sealing member 30 is disposed between the magnetic navigation radiofrequency ablation tube 10 and the injection ablation tube 20 to seal a gap between the magnetic navigation radiofrequency ablation tube 10 and the injection ablation tube 20. For example, the seal member 30 is sleeved outside the injection co-ablation flexible catheter and sleeved inside the magnetic navigated radiofrequency ablation tube 10. The seal 30 may be located at an end of the ablation catheter body 120 distal to the tip electrode 110.
As shown in fig. 8, according to some embodiments of the present invention, the magnetic navigated radio frequency and injection combination ablation flexible catheter 1 further comprises a stop 40. The stopper 40 is arranged between the magnetic navigation radiofrequency ablation tube 10 and the injection ablation tube 20 and used for limiting the relative position between the magnetic navigation radiofrequency ablation tube 10 and the injection ablation tube 20. For example, the stop 40 is externally sleeved on the injection combined ablation flexible catheter and internally sleeved on the magnetic navigation radiofrequency ablation tube 10. The retainer 40 may be in contact with the sealing member 30.
A magnetic navigated radiofrequency and injection combined ablation flexible catheter 1 according to an embodiment of the present invention is described in detail in a specific embodiment with reference to fig. 1-8. It is to be understood that the following description is illustrative only and is not intended to be in any way limiting. All similar structures and similar variations thereof adopted by the invention are intended to fall within the scope of the invention.
As shown in fig. 1, 5, 6, 8, a magnetic navigation radiofrequency and injection combined ablation flexible catheter 1 according to an embodiment of the invention comprises: a magnetically navigated radiofrequency ablation tube 10 and an infusion ablation tube 20.
As shown in fig. 1, 5, 6 and 8, the magnetic navigation rf ablation tube 10 and the injection ablation tube 20 are both flexible members. The outer diameter of the magnetic navigation radiofrequency ablation tube 10 is not less than 6F (1F ═ 0.334 mm). The magnetically navigated radiofrequency ablation tube 10 has a radiofrequency catheter lumen 100 running axially therethrough. The inner lumen diameter of the radiofrequency catheter lumen 100 is not less than 5F. The syringe ablation tube 20 can be fitted into the radiofrequency catheter lumen 100, and the syringe ablation tube 20 can be moved back and forth along the axis of the magnetically navigated radiofrequency ablation tube 10. The outer diameter of the injection ablation tube 20 is not less than 5F. The injection ablation tube 20 has an injection catheter lumen 200 running axially therethrough. The diameter of the injection catheter lumen 200 is not less than 0.5 mm. The infusion catheter lumen 200 may be used for infusion.
Specifically, as shown in fig. 2, 5, and 6, the magnetic navigated rf ablation tube 10 includes: a tip electrode 110, an ablation catheter body 120, a ring electrode 130, and a magnet ring 140.
As shown in fig. 3, the terminal electrode 110 includes an inner cylinder 111, an outer cylinder 112, a first connection plate 113, and a second connection plate 114. The inner cylinder 111 is fitted inside the outer cylinder 112 and spaced apart from the outer cylinder 112. The first connecting plate 113 and the second connecting plate 114 are both annular. A radially inner end of the first connection plate 113 is connected to one end of the inner cylinder 111, and a radially outer end of the first connection plate 113 is connected to one end of the outer cylinder 112. The radially inner end of the second connecting plate 114 is connected to the other end of the inner cylinder 111, and the radially outer end of the second connecting plate 114 is connected to the other end of the outer cylinder 112. The end electrode 110 is used to collect intracardiac electrophysiological signals.
As shown in fig. 3, the inner circumferential wall of the inner cylinder 111 defines a first rf cavity 115, the outer circumferential wall of the inner cylinder 111, the inner circumferential wall of the outer cylinder 112, a first connection plate 113, and a second connection plate 114 define a closed cavity, the outer cylinder 112 is provided with a plurality of saline holes 116 therethrough, and the first connection plate 113 is provided with a terminal electrode lead connector 117 and a first saline passage 118 therethrough. The cross section of the inner cylinder 111 is circular with a diameter of 0.5mm or more.
As shown in fig. 4, the ablation tube body 120 includes a second rf lumen 121, a second saline passageway 122, a first lead passageway 123, a second lead passageway 124, and a third lead passageway 125. An axial end of the ablation catheter body 120 is connected to the first connecting plate 113, and the second rf lumen 121 communicates with the first rf lumen 115 to form the rf catheter lumen 100. The second saline passage 122 communicates with the first saline passage 118 for delivering temperature-controlled saline during RF ablation. One end of the first wire passage 123 extends toward the terminal electrode wire connection 117. The central axis of the second rf lumen 121 is collinear with the central axis of the ablation catheter body 120. The first wire channel 123 has a first wire therein, one end of the first wire is electrically connected to the terminal electrode wire connector 117, and the first wire is a head end navigation three-dimensional spatial position wire for sensing the spatial position of the catheter.
As shown in fig. 5 and 6, the ring electrode 130 is sleeved on the ablation catheter body 120, and one end of the second guide wire channel 124 extends toward the ring electrode 130. The number of the ring electrodes 130 is plural, the number of the second conductive line channels 124 is odd, and the odd number of the second conductive line channels 124 corresponds to the odd number of the ring electrodes 130 one by one. One of the odd number of ring electrodes 130 is adapted for use with the end electrode 110. A second lead is disposed within the second lead channel 124 and has one end electrically connected to the ring electrode 130 for performing an intracardiac electrophysiological signal test.
As shown in fig. 5 and 6, the magnet ring 140 is sleeved on the ablation tube body 120, and one end of the third wire channel 125 extends toward the magnet ring 140. The number of the magnet rings 140 is plural, the number of the third wire channels 125 is plural, and the plural third wire channels 125 correspond to the plural magnet rings 140 one by one.
As shown in fig. 7, the injection ablation tube 20 includes an injection tube body 210 and an injection needle 220.
As shown in fig. 1 and 7, the injection tube body 210 has a first injection cavity 211 penetrating axially, the injection tube body 210 is movably disposed through the second rf cavity 121, and the first connecting plate 113 is adapted to stop the injection tube body 210. It will be appreciated that the aperture of the second rf cavity 121 is larger than the aperture of the first rf cavity 115. The cross-sectional dimension of the syringe body 210 is smaller than the aperture of the second rf cavity 121, and the syringe body 210 is adapted to fit into the second rf cavity 121 and can move back and forth in the second rf cavity 121. The cross-sectional dimension of syringe body 210 is larger than the bore diameter of first rf cavity 115, and syringe body 210 cannot extend into first rf cavity 115. The end of the syringe body 210 away from the needle 220 has millimeter scale for controlling the length of the needle 220 extending out of the end electrode 110. The end of the injection ablation tube 20 close to the injection needle 220 is provided with a magnetic navigation magnet ring 140 for magnetic field automatic navigation.
As shown in fig. 1 and 7, the injection needle 220 has a second injection cavity 221 extending therethrough in the axial direction. One end of the injection needle 220 is hermetically connected to one end of the injection tube body 210, and the second injection cavity 221 communicates with the first injection cavity 211 to form the injection catheter cavity 200. An injection needle 220 is movably disposed through the first rf cavity 115. It will be appreciated that the cross-sectional dimension of the needle 220 is smaller than the bore of the first rf cavity 115, and that the needle 220 is adapted to fit within the first rf cavity 115 and can move back and forth within the first rf cavity 115.
When one end of the syringe body 210 abuts against the first connecting plate 113, the other end of the syringe needle 220 exceeds the first rf cavity 115 by a length greater than or equal to 1 mm. It will be appreciated that the axial length of the needle 220 is greater than the axial length of the tip electrode 110 by a length of 1 mm or more.
As shown in fig. 8, the magnetic navigated radiofrequency and injection combined ablation flexible catheter 1 further comprises a sealing member 30. The sealing member 30 is sleeved outside the injection ablation tube 20 and sleeved inside the magnetic navigation RF ablation tube 10. The seal 30 is located at the end of the ablation catheter body 120 distal to the tip electrode 110. The sealing member 30 is used for sealing the gap between the magnetic navigation radiofrequency ablation tube 10 and the injection ablation tube 20.
As shown in fig. 8, the magnetic navigated radiofrequency and injection combined ablation flexible catheter 1 further comprises a stopper 40. The stopper 40 is sleeved outside the injection ablation tube 20 and sleeved inside the magnetic navigation RF ablation tube 10. The retainer 40 is disposed adjacent to the seal 30. The stopper 40 is used to define the relative position between the magnetic navigation radiofrequency ablation tube 10 and the injection ablation tube 20.
As shown in fig. 8, the magnetic navigation rf and injection combined ablation flexible catheter 1 further comprises a handle 50, and the handle 50 is sleeved on the magnetic navigation rf ablation tube 10. The handle 50 is used for navigating the magnetic navigation radio frequency and injection combined ablation flexible catheter 1.
During use of the magnetic navigation radiofrequency and injection combined ablation flexible catheter 1:
1. the injection ablation tube is sent into the radio frequency catheter cavity in vitro, the injection needle is kept within the end of the end electrode, and the injection ablation tube is locked by the limiting stopper.
2. And (3) exhausting the inner cavity of the magnetic navigation radiofrequency ablation tube and the inner cavity of the injection ablation tube by using normal saline.
3. And (3) sending the magnetic navigation radio frequency ablation tube into the selected heart cavity, and finishing the radio frequency ablation operation under the guidance of magnetic navigation and three-dimensional mapping.
4. For the focus in the deep part of the heart wall, under the accurate positioning of the magnetic navigation radio frequency ablation tube, the injection ablation tube is sent forward, the needle inserting depth of the injection needle head is controlled, and the injection ablation agent with the preset dosage is injected.
5. And withdrawing the injection ablation tube, carrying out electrophysiological examination by using the magnetic navigation radio frequency ablation tube, and evaluating the combined ablation effect.
6. And withdrawing the magnetic navigation radio frequency and injection combined ablation flexible catheter.
By adopting the embodiment of the invention, the radio frequency and injection ablation operation can be independently completed, the radio frequency and injection combined ablation operation can be completed by using the same catheter, and the success rate of the operation is high. But also can be used for treating arrhythmia focus with different depth, and has wide operation adaptation. In addition, the flexible magnetic catheter is adopted to complete the operation, the operation safety is high, the magnetic navigation is adopted to actively pull the flexible magnetic navigation, the working strength is low, and the training time of students is short.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention, and those skilled in the art can make various modifications and changes. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Although some embodiments described herein include some features included in other embodiments instead of others, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. The particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. For example, in the claims, any of the claimed embodiments may be used in any combination.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A magnetically navigated radiofrequency and injection combined ablation flexible catheter, comprising:
the magnetic navigation radio frequency ablation tube is provided with a radio frequency catheter cavity which is communicated along the axial direction;
the injection ablation tube is provided with an injection catheter cavity which penetrates along the axial direction, and the injection ablation tube is movably arranged in the radio frequency catheter cavity.
2. The magnetic navigated radio frequency and injection combined ablation flexible catheter of claim 1, wherein the magnetic navigated radio frequency ablation catheter comprises:
the end electrode comprises an inner cylinder, an outer cylinder, a first connecting plate and a second connecting plate, the inner cylinder is sleeved in the outer cylinder and is spaced from the outer cylinder, one end of the inner cylinder is connected with one end of the outer cylinder through the first connecting plate, the other end of the inner cylinder is connected with the other end of the outer cylinder through the second connecting plate, a first radio frequency cavity is defined by the inner peripheral wall of the inner cylinder, a closed cavity is defined by the outer peripheral wall of the inner cylinder, the inner peripheral wall of the outer cylinder, the first connecting plate and the second connecting plate, the outer cylinder is provided with a plurality of through saline holes, and the first connecting plate is provided with an end electrode lead connector and a through first saline channel;
the ablation catheter body comprises a second radio-frequency cavity, a second saline passage, a first wire passage, a second wire passage and a third wire passage, one axial end of the ablation catheter body is connected with the first connecting plate, the second radio-frequency cavity is communicated with the first radio-frequency cavity to form the radio-frequency catheter cavity, the second saline passage is communicated with the first saline passage, and one end of the first wire passage extends towards the end electrode wire connector;
the ring electrode is sleeved outside the ablation tube body, and one end of the second lead channel extends towards the ring electrode;
the magnet ring is sleeved outside the ablation tube body, and one end of the third wire channel extends towards the magnet ring.
3. The magnetically navigated radio frequency and injection combined ablation flexible catheter of claim 2, wherein the ablation tube body is circular in cross-section with a diameter of 2 mm or greater; and/or the presence of a gas in the gas,
the cross section of the inner cylinder is circular with the diameter more than or equal to 0.5 mm.
4. The magnetically navigated radio frequency and injection combined ablation flexible catheter of claim 2, wherein the central axis of the second radio frequency lumen is collinear with the central axis of the ablation tube body, and wherein the cross-section of the second radio frequency lumen is circular with a diameter of 1.6 mm or greater.
5. The magnetically navigated radio frequency and injection combined ablation flexible catheter of claim 2, wherein said ring electrodes are a plurality, said second wire channels are a plurality, and a plurality of said second wire channels correspond one-to-one with a plurality of said ring electrodes; and/or the presence of a gas in the gas,
the magnet rings are multiple, the third wire channels are multiple, and the third wire channels correspond to the magnet rings one to one.
6. The magnetically navigated radio frequency and injection combined ablation flexible catheter of claim 2, wherein said injection ablation tube comprises:
the injection tube body is provided with a first injection cavity which penetrates through the injection tube body along the axial direction, the injection tube body is movably arranged in the second radio frequency cavity in a penetrating mode, and the first connecting plate is suitable for stopping the injection tube body;
the injection needle is provided with a second injection cavity which penetrates through the injection needle in the axial direction, one end of the injection needle is connected with one end of the injection tube body in a sealing mode, the second injection cavity is communicated with the first injection cavity to form the injection catheter cavity, and the injection needle movably penetrates through the first radio frequency cavity.
7. The magnetically navigated radio frequency and injection combined ablation flexible catheter of claim 6, wherein when one end of said injection tube body abuts said first linkage plate, the length of the other end of said injection needle beyond said first radio frequency lumen is greater than or equal to 1 mm.
8. The magnetically navigated radiofrequency and injection combined ablation flexible catheter of claim 1, wherein the magnetically navigated radiofrequency ablation tube and the injection ablation tube are both flexible members.
9. The magnetic navigated radio frequency and injection combined ablation flexible catheter of claim 1, further comprising:
and the sealing element is arranged between the magnetic navigation radiofrequency ablation tube and the injection ablation tube so as to seal a gap between the magnetic navigation radiofrequency ablation tube and the injection ablation tube.
10. The magnetic navigated radio frequency and injection combined ablation flexible catheter of claim 1, further comprising:
and the stopper is arranged between the magnetic navigation radiofrequency ablation tube and the injection ablation tube and used for limiting the relative position between the magnetic navigation radiofrequency ablation tube and the injection ablation tube.
CN202010331138.5A 2020-04-24 2020-04-24 Magnetic navigation radio frequency and injection combined ablation flexible catheter Pending CN111513841A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102258397A (en) * 2011-05-04 2011-11-30 黄金华 Thermal chemical ablation treatment method for tumors
CN103271767A (en) * 2013-04-28 2013-09-04 黄金华 Method used for enhancing radiofrequency ablation
CN106806977A (en) * 2015-11-28 2017-06-09 吴永健 Through conduit intramyocardial injection system
CN107875503A (en) * 2017-12-20 2018-04-06 深圳市赛诺思医疗科技有限公司 Myocardial ablation device
CN107970059A (en) * 2017-12-20 2018-05-01 北京云峰智联医疗科技开发有限公司 Myocardial ablation device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102258397A (en) * 2011-05-04 2011-11-30 黄金华 Thermal chemical ablation treatment method for tumors
CN103271767A (en) * 2013-04-28 2013-09-04 黄金华 Method used for enhancing radiofrequency ablation
CN106806977A (en) * 2015-11-28 2017-06-09 吴永健 Through conduit intramyocardial injection system
CN107875503A (en) * 2017-12-20 2018-04-06 深圳市赛诺思医疗科技有限公司 Myocardial ablation device
CN107970059A (en) * 2017-12-20 2018-05-01 北京云峰智联医疗科技开发有限公司 Myocardial ablation device

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