CN114376718B - Arrhythmia radio frequency ablation protection device - Google Patents
Arrhythmia radio frequency ablation protection device Download PDFInfo
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- CN114376718B CN114376718B CN202210160226.2A CN202210160226A CN114376718B CN 114376718 B CN114376718 B CN 114376718B CN 202210160226 A CN202210160226 A CN 202210160226A CN 114376718 B CN114376718 B CN 114376718B
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- 238000007674 radiofrequency ablation Methods 0.000 title claims abstract description 26
- 206010003119 arrhythmia Diseases 0.000 title claims abstract description 12
- 230000006793 arrhythmia Effects 0.000 title claims abstract description 12
- 238000002679 ablation Methods 0.000 claims abstract description 68
- 239000012943 hotmelt Substances 0.000 claims abstract description 9
- 230000000694 effects Effects 0.000 claims abstract description 5
- 238000002844 melting Methods 0.000 claims description 14
- 230000008018 melting Effects 0.000 claims description 11
- 230000003902 lesion Effects 0.000 claims description 7
- 230000008602 contraction Effects 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 claims description 3
- 230000005670 electromagnetic radiation Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229920001187 thermosetting polymer Polymers 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims description 2
- 230000002763 arrhythmic effect Effects 0.000 claims 10
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims 3
- 238000003763 carbonization Methods 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 abstract description 3
- 210000001519 tissue Anatomy 0.000 description 18
- 238000010586 diagram Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 230000002107 myocardial effect Effects 0.000 description 5
- 206010028851 Necrosis Diseases 0.000 description 3
- 208000001871 Tachycardia Diseases 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000017074 necrotic cell death Effects 0.000 description 2
- 230000001338 necrotic effect Effects 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 206010049447 Tachyarrhythmia Diseases 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000000747 cardiac effect Effects 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 210000003191 femoral vein Anatomy 0.000 description 1
- 210000004731 jugular vein Anatomy 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 210000004165 myocardium Anatomy 0.000 description 1
- 210000001321 subclavian vein Anatomy 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
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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
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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
- A61B18/1206—Generators therefor
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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
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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
- 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
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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
- 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
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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
- A61B2018/00636—Sensing and controlling the application of energy
- A61B2018/00696—Controlled or regulated parameters
- A61B2018/00702—Power or energy
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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
- A61B2018/00636—Sensing and controlling the application of energy
- A61B2018/00773—Sensed parameters
- A61B2018/00791—Temperature
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Abstract
The invention relates to a radiofrequency ablation protection device for arrhythmia, which comprises a pulse transmitter, an ablation electrode, a control unit, an outer tube (1) and an inner tube (2), wherein the inner tube (2) is positioned in the outer tube (1), a cavity (22) is formed between the inner tube and the outer tube (1), the ablation electrode, an electromagnetic shielding part and a temperature sensor are arranged in the cavity (22), the ablation electrode is positioned at the outermost end, and the electromagnetic shielding part is positioned between the ablation electrode and the temperature sensor to reduce or eliminate the influence of electromagnetic waves generated by the ablation electrode on the temperature sensor; the ablation electrode, electromagnetic shield, and temperature sensor can be sequentially released from the cavity (22). According to the invention, the temperature sensor and the shielding ring are arranged between the inner tube and the outer tube, so that the electromagnetic waves generated during electrode ablation cannot cause measurement distortion of the temperature sensor, and the hot-melt effect can be detected, thereby avoiding carbonization or incomplete hot-melt and protecting the heart.
Description
Technical Field
The invention relates to a heart radiofrequency ablation device, in particular to an arrhythmia radiofrequency ablation protection device.
Background
Radio frequency ablation is an interventional therapy method for treating various refractory tachyarrhythmias by applying high-frequency and low-energy current to a part of cardiac muscle through a catheter to dehydrate the part and generate coagulative necrosis. Radio frequency ablation is to use radio frequency electric dehydration to cause tissue coagulation necrosis, so as to achieve the purpose of treating a plurality of tachyarrhythmia.
Firstly, the blood is sent into a cardiac catheter electrode through a puncture internal jugular vein or a subclavian vein and a bilateral femoral vein for electrophysiological examination so as to clearly diagnose the position of the focus to be ablated. Then a special large-head ablation catheter is selected to reach a focus position, radio frequency current is emitted in a short time, and local relatively high temperature is generated after the radio frequency current contacts myocardial tissues, so that the local myocardial tissues are dried and necrotic, and the necrotic myocardial tissues do not play a role of conducting electric signals any more, and arrhythmia is cured radically.
However, the existing radiofrequency ablation devices have the following technical drawbacks: (1) when the radiofrequency ablation electrode heats the tissue, the heating temperature is not easy to control, so that the heat coagulation carbonization caused by overheating in the focus area or the incomplete drying and necrosis of the myocardial tissue in the focus area caused by insufficient heating temperature are not easy to judge. (2) If a focus area is monitored by using the temperature sensor, the temperature measured by the temperature sensor is easily interfered by electromagnetic waves emitted by the electrode, and the real temperature cannot be reflected.
Disclosure of Invention
The invention designs an arrhythmia radio frequency ablation protection device, which solves the technical problems that: (1) when the radiofrequency ablation electrode heats the tissue, the heating temperature is not easy to control, so that the heating temperature is not easy to judge whether the myocardial tissue in the focus area is not completely dried and necrosed due to overheating of the focus area or insufficient heating temperature. (2) If the temperature sensor is used for monitoring the focus area, the temperature measured by the temperature sensor is easily interfered by the electromagnetic wave emitted by the electrode, and the real temperature cannot be reflected.
In order to solve the technical problems, the invention adopts the following scheme:
the utility model provides an arrhythmia radio frequency ablation protection device, includes pulse emitter, melts electrode and the control unit, and the control unit control pulse emitter produces electric pulse and produces to the heart focus tissue and melt heat energy, and the control unit is connected pulse emitter and melting electrode, its characterized in that: the temperature sensor is characterized by further comprising an outer tube and an inner tube, the inner tube is located in the outer tube, a cavity is formed between the inner tube and the outer tube, the ablation electrode, the electromagnetic shielding piece and the temperature sensor are arranged in the cavity, the ablation electrode is located at the outermost end, and the electromagnetic shielding piece is located between the ablation electrode and the temperature sensor to reduce or eliminate the influence of electromagnetic waves generated by the ablation electrode on the temperature sensor; the ablation electrode, the electromagnetic shield, and the temperature sensor can be sequentially released from the cavity.
Preferably, the ablation electrode is an ablation electrode elastic telescopic ring, and the ablation electrode elastic telescopic ring is sleeved on the inner tube after being compressed and reduced and is clamped and limited by the outer tube and the inner tube.
Preferably, when the elastic telescopic ring of the ablation electrode is positioned in the cavity, one side of the elastic telescopic ring of the ablation electrode is provided with a first pull wire, the first pull wire comes out from an opening between the outer tube and the inner tube and returns back to an operation end along the outer tube, the other side of the elastic telescopic ring of the ablation electrode is provided with a guide wire rod, and the guide wire rod penetrates through a first passing hole of the inner tube, enters the inner cavity of the inner tube and is connected with the pulse transmitter; when the operating end pulls the first pull wire, the elastic expansion ring of the ablation electrode can be separated from the outer tube and the inner tube, and the inner diameter of the elastic expansion ring of the ablation electrode is enlarged.
Preferably, the ablation electrode elastic expansion ring is of a spring structure or a ring shape formed by arranging the elastic contraction part and the folding electrode at intervals, and the folding electrode can be unfolded by the elastic force generated by the elastic contraction part.
Preferably, the electromagnetic shielding member is a shielding ring which is sleeved on the inner tube after being compressed and reduced and is clamped and limited by the outer tube and the inner tube.
Preferably, when the shielding ring is located in the cavity, a second pull wire is arranged on one side of the shielding ring, the second pull wire comes out from an opening between the outer pipe and the inner pipe and turns back to an operation end along the outer pipe, a first operating rod is arranged on the other side of the shielding ring, and the first operating rod penetrates through a second through hole of the inner pipe, enters the inner cavity of the inner pipe and extends to the operation end; when the operating end pulls the second pull wire, the shielding ring can be separated from the outer tube and the inner tube and does not block the temperature sensor from moving out of the cavity, and the operating end pulls the first operating rod back to enable the shielding ring to contract into the cavity.
Preferably, the elastic and telescopic material of the shielding ring is beneficial to extruding the outer pipe and the inner pipe to form a closed environment so that the temperature sensor is not influenced by electromagnetic radiation.
Preferably, the temperature sensor is a temperature sensor telescopic ring which is sleeved on the inner pipe after being compressed and reduced and is clamped and limited by the outer pipe and the inner pipe.
Preferably, when the temperature sensor telescopic ring is located in the cavity, a third pull wire is arranged on one side of the temperature sensor telescopic ring, the third pull wire comes out from an opening between the outer pipe and the inner pipe and returns back to an operation end along the outer pipe, a second operating rod is arranged on the other side of the temperature sensor telescopic ring, and the second operating rod penetrates through a second through hole of the inner pipe, enters the inner cavity of the inner pipe and extends to the operation end; when the operating end pulls the third pull wire, the temperature sensor telescopic ring is separated from the outer tube and the inner tube, and a plurality of temperature acquisition points are arranged on the temperature sensor telescopic ring to acquire temperature values of different positions of the heart lesion tissue; the operating end pushes the second operating rod to enable the temperature sensor telescopic ring to contact heart lesion tissues, and the operating end pulls the second operating rod to enable the temperature sensor telescopic ring to contract and contract into the cavity.
Preferably, the outer wall of the outer pipe is provided with a plurality of guide pieces along the axial direction, so that the first pull wire, the second pull wire and the third pull wire can be pulled smoothly by the operating end.
Preferably, the plurality of temperature sensors arranged on the temperature sensor telescopic ring are thermistors.
Preferably, the first pull wire is pulled to release the ablation electrode elastic expansion ring, and the guide wire rod is pushed and pulled to enable the ablation electrode elastic expansion ring to reach a preset position; the control unit starts the pulse emitter to enable the ablation electrode elastic telescopic ring to generate hot-melt radio frequency current to act on the heart focus tissue; completing hot melting according to preset time and preset power; pulling the second pull wire to release the shielding ring; pulling a third pull wire to release the temperature sensor telescopic ring, and pushing and pulling a second operating rod to enable the temperature sensor telescopic ring to reach a heart focus tissue hot-melting position; the temperature sensor telescopic ring acquires temperature values of a plurality of temperature measuring points, if the temperature values are in a preset temperature interval, the hot melting effect is judged to be good, and if the temperature values are lower than the preset temperature interval, the hot melting is not sufficient; if the temperature value is higher than the predetermined temperature interval, it indicates that there is a possibility of thermosetting charring.
The arrhythmia radio frequency ablation protection device has the following beneficial effects:
(1) according to the invention, the temperature sensor and the shielding ring are arranged between the inner tube and the outer tube, so that the electromagnetic waves generated during electrode ablation cannot cause measurement distortion of the temperature sensor, and the hot-melt effect can be detected, thereby avoiding carbonization or incomplete hot-melt and protecting the heart.
(2) The invention hides the hot-melt electrode, the shielding ring and the temperature sensor in the space between the inner pipe and the outer pipe, is convenient to operate, and can form the shielding space by utilizing the space between the inner pipe and the outer pipe to ensure the accurate measurement of the temperature sensor.
Drawings
FIG. 1: the arrhythmia radio frequency ablation protection device is in a schematic use state;
FIG. 2: the invention relates to a section view of an arrhythmia radio frequency ablation protection device;
FIG. 3: the invention discloses a release diagram of an elastic telescopic ring of an ablation electrode;
FIG. 4: the invention discloses a release diagram of a shielding elastic telescopic ring;
FIG. 5: the invention discloses a release schematic diagram of a temperature sensor telescopic ring;
FIG. 6: the first structure schematic diagram of the ablation electrode elastic telescopic ring of the invention;
FIG. 7 is a schematic view of: the first structure schematic diagram of the ablation electrode elastic telescopic ring of the invention.
Description of reference numerals:
1-an outer tube; 11-a guide; 2-an inner tube; 21-lumen; 22-a cavity; 23-a first pass hole; 24-a second through hole; 25-third through row holes; 3-an elastic telescopic ring of the ablation electrode; 31-a first pull line; 32-a wire guide rod; 33-an elastic contracting member; 34-a folded electrode; 4-a shield ring; 41-a second pull line; 42-a first operating lever; 5-temperature sensor telescopic ring; 51-a third pull line; 52-second lever.
Detailed Description
The invention is further described below with reference to fig. 1 to 7:
as shown in fig. 1-2, an arrhythmia rf ablation protection device includes a pulse emitter, an ablation electrode, and a control unit, wherein the control unit controls the pulse emitter to generate an electrical pulse to generate ablation heat energy to a heart lesion tissue, and the control unit connects the pulse emitter with the ablation electrode.
The temperature sensor is characterized by further comprising an outer tube 1 and an inner tube 2, wherein the inner tube 2 is located inside the outer tube 1, a cavity 22 is formed between the inner tube and the outer tube 1, an ablation electrode, an electromagnetic shielding part and a temperature sensor are arranged in the cavity 22, the ablation electrode is located at the outermost end, and the electromagnetic shielding part is located between the ablation electrode and the temperature sensor to reduce or eliminate the influence of electromagnetic waves generated by the ablation electrode on the temperature sensor; the ablation electrode, electromagnetic shield, and temperature sensor can be sequentially released from the cavity 22.
The ablation electrode is an ablation electrode elastic telescopic ring 3, and the ablation electrode elastic telescopic ring 3 is sleeved on the inner tube 2 and is clamped and limited by the outer tube 1 and the inner tube 2 after being compressed and reduced.
The electromagnetic shielding member is a shielding ring 4, and the shielding ring 4 is sleeved on the inner pipe 2 after being compressed and reduced and is clamped and limited by the outer pipe 1 and the inner pipe 2.
When the shielding ring 4 is located in the cavity 22, one side of the shielding ring 4 is provided with a second pull wire 41, the second pull wire 41 comes out from the opening between the outer tube 1 and the inner tube 2 and is folded back along the outer tube 1 to an operating end, the other side of the shielding ring 4 is provided with a first operating rod 42, and the first operating rod 42 passes through the second through hole 24 of the inner tube 2, enters the inner cavity 21 of the inner tube 2 and extends to the operating end; when the operating end pulls the second pulling wire 41, the shielding ring 4 will be disengaged from the outer tube 1 and the inner tube 2 and does not block the temperature sensor from moving out of the cavity 22, and the operating end pulls the first operating rod 42 back to enable the shielding ring 4 to contract into the cavity 22.
The elastic and telescopic material of the shielding ring 4 is helpful for extruding the outer pipe 1 and the inner pipe 2 to form a closed environment so that the temperature sensor is not influenced by electromagnetic radiation.
The temperature sensor is a temperature sensor telescopic ring 5, and the temperature sensor telescopic ring 5 is sleeved on the inner pipe 2 after being compressed and reduced and is clamped and limited by the outer pipe 1 and the inner pipe 2.
The temperature sensor can be fixed on the elastic rubber ring, and the elastic rubber ring can be unfolded after leaving the inner pipe and the outer pipe, so that the temperature sensor is uniformly distributed on the elastic rubber ring.
When the temperature sensor telescopic ring 5 is located in the cavity 22, one side of the temperature sensor telescopic ring 5 is provided with a third stay wire 51, the third stay wire 51 comes out from an opening between the outer tube 1 and the inner tube 2 and is folded back to an operation end along the outer tube 1, the other side of the temperature sensor telescopic ring 5 is provided with a second operating rod 52, and the second operating rod 52 passes through a third passing hole 25 of the inner tube 2, enters the inner cavity 21 of the inner tube 2 and extends to the operation end; when the third pull wire 51 is pulled by the operating end, the temperature sensor telescopic ring 5 is separated from the outer tube 1 and the inner tube 2, and the temperature sensor telescopic ring 5 is provided with a plurality of temperature acquisition points for acquiring temperature values of different positions of heart lesion tissues; the operating end pushes the second operating rod 52 to enable the temperature sensor telescopic ring 5 to contact with heart lesion tissues, and the operating end pulls the second operating rod 52 to enable the temperature sensor telescopic ring 5 to contract and contract into the cavity 22.
The outer wall of the outer tube 1 is provided with a plurality of guide members 11 along the axial direction, so that the first pull wire 31, the second pull wire 41 and the third pull wire 51 can be pulled smoothly by the operation end.
The plurality of temperature sensors arranged on the temperature sensor telescopic ring 5 are thermistors.
As shown in FIG. 3, the first pulling wire 31 is pulled to release the elastic expansion ring 3 of the ablation electrode, and the wire guiding rod 32 is pushed and pulled to make the elastic expansion ring 3 of the ablation electrode reach the preset position. The control unit starts the pulse emitter to enable the ablation electrode elastic telescopic ring 3 to generate hot-melt radio frequency current to act on the heart focus tissue; finishing hot melting according to preset time and preset power;
as shown in fig. 4, the second pulling wire 41 is pulled to release the shield ring 4.
As shown in fig. 5, the third pull wire 51 is pulled again to release the temperature sensor telescopic ring 5, and the second operating rod 52 is pushed and pulled to make the temperature sensor telescopic ring 5 reach the heart focal tissue hot-melting position; the temperature sensor telescopic ring 5 collects temperature values of a plurality of temperature measuring points, if the temperature values are in a preset temperature interval, the hot melting effect is judged to be good, and if the temperature values are lower than the preset temperature interval, the hot melting is not sufficient; if the temperature value is above the predetermined temperature interval, it indicates the possibility of thermosetting carbon.
After completion of the thermal ablation, the wire shaft 32 is pulled so that the ablation electrode elastic expansion ring 3 contracts fully or partially into the cavity 22. The pulling back of the first operating rod 42 by the operating end can cause the shield ring 4 to retract fully or partially into the cavity 22. The operation end pulls back the second operation rod 52 to enable the temperature sensor telescopic ring 5 to be contracted into all or part of the cavity 22, and the hot melt protection device is convenient to take out.
When the ablation electrode elastic telescopic ring 3 is positioned in the cavity 22, one side of the ablation electrode elastic telescopic ring 3 is provided with a first pull wire 31, the first pull wire 31 comes out from the opening between the outer tube 1 and the inner tube 2 and returns back to the operation end along the outer tube 1, the other side of the ablation electrode elastic telescopic ring 3 is provided with a lead bar 32, and the lead bar 32 passes through the first passing hole 23 of the inner tube 2, enters the inner cavity 21 of the inner tube 2 and is connected with the pulse transmitter; when the operating end pulls the first pull wire 31, the ablation electrode elastic expansion ring 3 will be separated from the outer tube 1 and the inner tube 2 and the inner diameter will be enlarged.
As shown in fig. 6, the ablation electrode elastic expansion ring 3 is of a spring structure as a whole. As shown in fig. 7, the elastic force generated by the elastic contracting member 33 can unfold the folded electrode 34 in a ring shape in which the elastic contracting member 33 and the folded electrode 34 are spaced apart from each other.
The invention is described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the above embodiments, and it is within the scope of the invention to use various modifications of the inventive method concept and solution, or to directly apply the inventive concept and solution to other applications without modification.
Claims (11)
1. The utility model provides an arrhythmia radiofrequency ablation protection device, includes pulse transmitter, melts electrode and the control unit, and the control unit control pulse transmitter produces electric pulse and produces to the heart focus tissue and melt heat energy, and the control unit is connected pulse transmitter and melting electrode, its characterized in that: the temperature sensor is characterized by further comprising an outer tube (1) and an inner tube (2), wherein the inner tube (2) is located inside the outer tube (1), a cavity (22) is formed between the inner tube and the outer tube (1), the ablation electrode, the electromagnetic shielding piece and the temperature sensor are arranged in the cavity (22), the ablation electrode is located at the outermost end along the central axial direction of the inner tube and the outer tube, and the electromagnetic shielding piece is located between the ablation electrode and the temperature sensor to reduce or eliminate the influence of electromagnetic waves generated by the ablation electrode on the temperature sensor; the ablation electrode, the electromagnetic shield and the temperature sensor can be released from the cavity (22) in sequence; the ablation electrode is an ablation electrode elastic telescopic ring (3), and the ablation electrode elastic telescopic ring (3) is sleeved on the inner tube (2) after being compressed and reduced and is clamped and limited by the outer tube (1) and the inner tube (2).
2. The arrhythmic radiofrequency ablation protection device of claim 1, wherein: when the elastic telescopic ring (3) of the ablation electrode is positioned in the cavity (22), the elastic telescopic ring (3) of the ablation electrode is provided with a first pull wire (31), the first pull wire (31) comes out from an opening between the outer tube (1) and the inner tube (2) and is folded back to an operation end along the outer tube (1), the elastic telescopic ring (3) of the ablation electrode is further provided with a lead rod (32), and the lead rod (32) penetrates through a first passing hole (23) of the inner tube (2) to enter an inner cavity (21) of the inner tube (2) and is connected with a pulse transmitter; when the operating end pulls the first pull wire (31), the elastic expansion ring (3) of the ablation electrode is separated from the outer tube (1) and the inner tube (2) and the inner diameter is enlarged.
3. The arrhythmic radiofrequency ablation protection device of claim 2, wherein: the ablation electrode elastic telescopic ring (3) is of a spring structure or a ring shape formed by arranging the elastic contraction piece (33) and the folding electrode (34) at intervals, and the folding electrode (34) can be unfolded by the elastic force generated by the elastic contraction piece (33).
4. The arrhythmic radiofrequency ablation protection device of claim 3, wherein: the electromagnetic shielding part is a shielding ring (4), and the shielding ring (4) is sleeved on the inner pipe (2) after being compressed and reduced and is clamped and limited by the outer pipe (1) and the inner pipe (2).
5. The arrhythmic radiofrequency ablation protection device of claim 4, wherein: when the shielding ring (4) is located in the cavity (22), the shielding ring (4) is provided with a second pull wire (41), the second pull wire (41) comes out from an opening between the outer pipe (1) and the inner pipe (2) and is folded back to an operation end along the outer pipe (1), the shielding ring (4) is further provided with a first operating rod (42), and the first operating rod (42) penetrates through a second through hole (24) of the inner pipe (2) to enter the inner cavity (21) of the inner pipe (2) and extends to the operation end; when the operating end pulls the second pull wire (41), the shielding ring (4) is separated from the outer tube (1) and the inner tube (2) and does not block the temperature sensor from moving out of the cavity (22), and the operating end pulls the first operating rod (42) back to enable the shielding ring (4) to contract into the cavity (22).
6. The arrhythmic radiofrequency ablation protection device of claim 5, wherein: the elastic telescopic material of the shielding ring (4) is beneficial to extruding the outer pipe (1) and the inner pipe (2) to form a closed environment, so that the temperature sensor is not influenced by electromagnetic radiation.
7. The arrhythmic radiofrequency ablation protection device of claim 6, wherein: the temperature sensor is a temperature sensor telescopic ring (5), and the temperature sensor telescopic ring (5) is sleeved on the inner pipe (2) after being compressed and reduced and is clamped and limited by the outer pipe (1) and the inner pipe (2).
8. The arrhythmic radiofrequency ablation protection device of claim 7, wherein: when the temperature sensor telescopic ring (5) is located in the cavity (22), the temperature sensor telescopic ring (5) is provided with a third pull wire (51), the third pull wire (51) comes out from an opening between the outer pipe (1) and the inner pipe (2) and returns back to an operation end along the outer pipe (1), the temperature sensor telescopic ring (5) is further provided with a second operating rod (52), and the second operating rod (52) penetrates through a third through hole (25) of the inner pipe (2) to enter an inner cavity (21) of the inner pipe (2) and extends to the operation end; when the third pull wire (51) is pulled by the operating end, the temperature sensor telescopic ring (5) is separated from the outer tube (1) and the inner tube (2), and the temperature sensor telescopic ring (5) is provided with a plurality of temperature acquisition points for acquiring temperature values of different positions of heart lesion tissues; the operating end pushes the second operating rod (52) to enable the temperature sensor telescopic ring (5) to contact heart lesion tissues, and the operating end pulls the second operating rod (52) back to enable the temperature sensor telescopic ring (5) to contract into the cavity (22).
9. The arrhythmic radiofrequency ablation protection device of claim 8, wherein: the outer wall of the outer pipe (1) is provided with a plurality of guide pieces (11) along the axial direction, so that the first pull wire (31), the second pull wire (41) and the third pull wire (51) can be pulled smoothly by the operating end.
10. The arrhythmic radiofrequency ablation protection device of claim 9, wherein: the temperature sensors arranged on the temperature sensor telescopic ring (5) are thermistors.
11. The arrhythmic radiofrequency ablation protection device of claim 10, wherein:
pulling the first pull wire (31), releasing the ablation electrode elastic telescopic ring (3), and pushing and pulling the guide wire rod (32) to enable the ablation electrode elastic telescopic ring (3) to reach a preset position;
the control unit starts the pulse emitter to enable the ablation electrode elastic telescopic ring (3) to generate hot-melt radio frequency current to act on the heart focus tissue; completing hot melting according to preset time and preset power;
pulling a second pull wire (41) to release the shielding ring (4);
then pulling a third pull wire (51), releasing the temperature sensor telescopic ring (5), and pushing and pulling a second operating rod (52) to enable the temperature sensor telescopic ring (5) to reach a heart focus tissue hot-melting position;
the temperature sensor telescopic ring (5) collects temperature values of a plurality of temperature measuring points, if the temperature values are in a preset temperature interval, the hot melting effect is judged to be good, and if the temperature values are lower than the preset temperature interval, the hot melting is not sufficient; if the temperature value is above the predetermined temperature interval, it indicates the possibility of thermosetting carbon.
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