CN114983561B - Radio frequency ablation equipment with vapor-liquid guiding function and operation method thereof - Google Patents
Radio frequency ablation equipment with vapor-liquid guiding function and operation method thereof Download PDFInfo
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- 239000007788 liquid Substances 0.000 title claims abstract description 68
- 238000007674 radiofrequency ablation Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000002679 ablation Methods 0.000 claims abstract description 69
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- 238000003763 carbonization Methods 0.000 abstract description 4
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- 230000001575 pathological effect Effects 0.000 description 6
- 150000002500 ions Chemical class 0.000 description 5
- 230000009172 bursting Effects 0.000 description 3
- 230000036285 pathological change Effects 0.000 description 3
- 231100000915 pathological change Toxicity 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 206010028851 Necrosis Diseases 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 230000002107 myocardial effect Effects 0.000 description 2
- 230000017074 necrotic cell death Effects 0.000 description 2
- 208000012260 Accidental injury Diseases 0.000 description 1
- 206010031264 Osteonecrosis Diseases 0.000 description 1
- 206010049447 Tachyarrhythmia Diseases 0.000 description 1
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- 230000007831 electrophysiology Effects 0.000 description 1
- 238000002001 electrophysiology Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000001105 femoral artery Anatomy 0.000 description 1
- 210000003191 femoral vein Anatomy 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 210000004731 jugular vein Anatomy 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
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- 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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- 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
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- A61B2018/00595—Cauterization
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- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
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- A61B2218/00—Details of surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2218/001—Details of surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body having means for irrigation and/or aspiration of substances to and/or from the surgical site
- A61B2218/007—Aspiration
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Abstract
The invention relates to the technical field of radio frequency ablation, and discloses radio frequency ablation equipment with a vapor-liquid guiding function and an operation method thereof, wherein the radio frequency ablation equipment comprises an equipment handle, a puncture tube, an insulating head and a lifting driving mechanism; the insulating head comprises an insulating tube, and an ablation electrode, a pressure detection part and a vapor-liquid guiding part are arranged in the insulating tube. This radiofrequency ablation equipment with vapour and liquid derived function drives connecting rod, ablation electrode through the microcylinder in proper order and removes, makes the ablation electrode shrink into the centre bore inside before carrying out radiofrequency ablation, can derive the tissue liquid on lesion tissue tumor surface through the negative pressure, prevents to be stained with the tissue liquid on the ablation electrode when clearing up lesion tissue tumor surface tissue liquid, and the tissue liquid is adhered on the ablation electrode surface because of high temperature carbonization when avoiding carrying out radiofrequency ablation subsequently, influences the normal work of ablation electrode.
Description
Technical Field
The invention relates to the technical field of radio frequency ablation, in particular to radio frequency ablation equipment with a vapor-liquid guiding function and an operation method thereof.
Background
The radio frequency ablation is to insert an electrode catheter into the heart through the femoral artery and vein, the internal jugular vein and the subclavian vein, find abnormal electric conduction channels or ectopic beat points in the heart by using an electrophysiology mapping technology, and generate resistive electrothermal effect in myocardial tissue by using the electrode at the top end of the big head catheter to dry and necrosis myocardial cells so as to achieve the aim of treating tachyarrhythmia. All the radio frequency thermal ablation devices consist of five parts, namely an electric generator, a measurement and control unit, an electrode needle (radio frequency ablation needle), a skin electrode and a computer, wherein the system forms a closed loop, and the electrode needle is connected with the skin electrode of a patient.
During treatment, an individual radio frequency ablation needle is selected according to the size of the lesion tissue, a multi-needle electrode is directly penetrated into the lesion tissue tumor under the guidance of B ultrasonic or CT, when radio frequency current flows through human tissue, positive ions and negative ions in cells rapidly move due to rapid change of an electromagnetic field, and then the friction between the positive ions and the negative ions and other molecules, ions and the like in the cells heat the lesion sites, so that the moisture inside and outside the lesion tissue is evaporated, dried, condensed and shed to cause aseptic necrosis, and the treatment purpose is achieved.
However, when the existing radio frequency ablation equipment is used for treatment, an ablation electrode is directly penetrated into pathological tissues to perform radio frequency ablation, when the pathological tissues are quickly heated, inactivated and necrotized, tissue fluid on the surface of the pathological tissues and local tissues at the edge of the pathological tissues are also affected by high temperature, and are adhered to the surface of the electrode due to carbonization at the high temperature, so that the surface of the electrode is partially covered, and further, the loop communication effect between the radio frequency ablation electrode and the tissues is poor, and the ablation effect is affected; when the ablation electrode acts on the pathological tissue, the temperature of the pathological tissue is gradually increased, so that the liquid is vaporized to generate water vapor, and the water vapor can be expanded to cause bursting, thereby causing accidental injury to a human body.
In addition, in the prior art, an ablation electrode is penetrated into a lesion tissue tumor under the guidance of B ultrasonic or CT, and the ablation effect is easily reduced only by means of observing a real-time monitoring picture of B ultrasonic or CT by human eyes, so that the electrode end part cannot be ensured to act on the surface of the lesion tissue vertically.
Disclosure of Invention
(One) solving the technical problems
Aiming at the defects of the prior art, the invention provides the radio frequency ablation equipment with the vapor-liquid guiding function, which has the advantages of guiding out tissue liquid on the surface of a lesion tissue tumor before radio frequency ablation, guiding out vapor at the same time of radio frequency ablation and the like, and solves the problems that the prior art is easy to cause the adhesion of the carbonized tissue liquid of an ablation electrode and the possibility of bursting of the vapor generated at high temperature.
(II) technical scheme
In order to solve the technical problems that the prior art is easy to cause the adhesion of carbonized tissue fluid of an ablation electrode and the possibility of bursting of water vapor generated at high temperature, the invention provides the following technical scheme:
The radio frequency ablation device with the vapor-liquid guiding function comprises a device handle, a puncture tube, an insulating head and a lifting driving mechanism, wherein the insulating head is arranged at the distal end of the puncture tube in a sliding manner, the proximal end of the puncture tube is fixedly connected to the device handle, and the device handle is connected with a radio frequency ablation system through a cable;
The insulation head comprises an insulation tube, an ablation electrode, a pressure detection piece and a vapor-liquid guiding piece are arranged in the insulation tube, and the pressure detection piece and the vapor-liquid guiding piece are uniformly and alternately distributed around the ablation electrode;
after the insulating tube reaches the position of a lesion tissue tumor in a human body, the ablation electrode can be driven to reciprocate by the lifting driving mechanism, and firstly, the ablation electrode is independently contracted so that the vapor-liquid guiding-out piece can guide out tissue liquid on the surface of the lesion tissue tumor; then, the ablation electrode and the vapor-liquid guiding-out part synchronously shrink to enable the detection end of the pressure detection part to relatively extend out of the insulating tube and contact with edge tissues of the lesion tissue tumor, and whether the insulating tube vertically acts on the lesion tissue tumor is judged through the pressure values detected by the pressure detection parts; finally, maintaining the direction of the insulating tube unchanged, resetting the ablation electrode and the vapor-liquid guiding-out piece, and respectively carrying out radio frequency ablation on the lesion tissue tumor and guiding out high-temperature generated vapor in real time.
Preferably, a central hole is formed in the middle of the insulating tube, and mounting holes and guide-out holes which are uniformly distributed in equal number and are arranged in a staggered manner are formed in the insulating tube and located outside the central hole;
the ablation electrode and the pressure detection part are respectively and slidably assembled in the central hole and the mounting hole, the pressure detection part is fixedly connected to the far end of the puncture tube, the vapor-liquid guiding-out part is communicated with the guiding-out hole, and the vapor-liquid guiding-out part is connected with an external negative pressure device.
Preferably, the lifting driving mechanism comprises a micro cylinder and a driving piece, the driving piece comprises a connecting rod and a connecting cylinder, the fixed end and the movable end of the micro cylinder are respectively and fixedly connected with the puncture tube and the connecting rod, the connecting cylinder is fixedly connected with one end of the connecting rod, which is provided with the micro cylinder, the ablation electrode is fixedly arranged at the other end of the connecting rod, and the connecting rod and the connecting cylinder are in sliding fit with the inner wall of the central hole.
Preferably, the surface of the insulating tube is uniformly provided with guide through holes communicated with the inside of the central hole, the guide through holes are respectively arranged between the adjacent mounting holes and the guide out holes, and the opening ends of the guide through holes are fixedly connected with an upper fixing plate;
The puncture device comprises a puncture tube, and is characterized in that a connecting sleeve is arranged at the distal end of the puncture tube, the inner wall of the connecting sleeve is in sliding fit with the outer wall of the insulating tube, lower fixing plates are uniformly arranged on the surface of the inner wall of the connecting sleeve, the lower fixing plates are respectively in sliding fit with the inner wall of the guide through hole, and springs are respectively assembled between the lower fixing plates and the upper fixing plates;
the connecting cylinder is far away from the outside of one end of connecting rod evenly is provided with first clamp plate, first clamp plate is located the insulating tube outside.
Preferably, the surface of the insulating tube is uniformly provided with a connecting plate, the surface of the connecting rod is uniformly provided with a second pressing plate, the shape of the connecting plate is consistent with that of the second pressing plate, the positions of the connecting plate and the second pressing plate are in one-to-one correspondence, and the connecting plate is positioned between the lower fixing plate and the second pressing plate.
Preferably, an electrode wire is arranged on the ablation electrode, a threading hole is formed in the surface of the connecting rod, the electrode wire extends from the inside of the threading hole to the inside of the puncture tube and is connected with the radio frequency ablation system through a cable wire, and the part of the electrode wire, which is positioned in the connecting rod, is in a spiral shape capable of freely stretching.
Preferably, the vapor-liquid guiding-out part comprises a guiding-out pipe, wherein the guiding-out hole is close to the inner wall of one end of the puncture pipe and is in sliding fit with the outer wall of the guiding-out pipe, and the guiding-out pipe extends to the inside of the puncture pipe and is communicated with an external negative pressure device.
Preferably, the pressure detecting member comprises a pressure sensor and a fixing rod, the fixing rod is fixedly connected to the far end of the puncture tube, the pressure sensor is fixedly installed at one end of the fixing rod far away from the puncture tube, and a connecting wire of the pressure sensor extends from the inside of the fixing rod to the inside of the puncture tube and is connected with the radio frequency ablation system through a cable.
Preferably, the outer wall of one end of the connecting sleeve far away from the puncture tube is provided with a smooth curved surface.
(III) beneficial effects
Compared with the prior art, the invention provides the radio frequency ablation equipment with the vapor-liquid guiding function, which has the following beneficial effects:
1. this radio frequency ablation equipment with vapour and liquid eduction function drives the connecting rod through the microcylinder and contracts to half displacement stroke volume from the biggest displacement stroke volume, makes the connecting rod drive ablation electrode shrink into inside the centre bore, exports export hole, vapour and liquid eduction piece to equipment outside in proper order with the tissue liquid on lesion tissue lump surface through the negative pressure, prevents to be stained with the tissue liquid on the ablation electrode when clearing up lesion tissue lump surface tissue liquid, and the tissue liquid is adhered on the ablation electrode surface because of high temperature carbonization when avoiding carrying out radio frequency ablation subsequently, influences the normal work of ablation electrode.
2. This radio frequency ablation equipment with vapour and liquid derived function drives the connecting rod through the microcylinder and contracts to minimum displacement stroke volume from half displacement stroke volume, makes the connecting rod drive the connecting plate through the second clamp plate and retract in step, and the connecting plate drives insulating tube, goes up fixed plate and retract in step for the detection end of pressure detection spare is located the insulating tube outside and contacts with the border tissue of pathological change tissue tumor, and the angle of placing through adjusting the insulating tube is unanimous until the pressure value that each pressure detection spare detected, in order to guarantee insulating tube perpendicular to pathological change tissue tumor, realizes the best effect of ablating.
3. This radio frequency ablation equipment with vapour and liquid eduction function keeps the direction unchanged through making the insulating tube that adjusts angle of placement, makes the microcylinder extend from minimum displacement stroke volume to the biggest displacement stroke volume and drives ablation electrode and insulating tube and reset, and the ablation electrode circular telegram carries out radio frequency to pathological change tissue lump and melts, makes its rapid heating kill and live necrosis, simultaneously exports export outside the equipment from export hole, vapour and liquid eduction piece in proper order with the vapor that high temperature produced through the negative pressure, avoids steam to burst and causes human injury.
Drawings
FIG. 1 is an exploded view of a portion of the assembly of the present invention;
FIG. 2 is a schematic perspective view of the present invention;
FIG. 3 is a schematic view of a partial cross-sectional structure of a lift driving mechanism according to the present invention;
FIG. 4 is a schematic view of a partial cross-sectional structure of a connecting sleeve according to the present invention;
FIG. 5 is a schematic cross-sectional view of a portion of the assembly of the present invention with the cylinder at a maximum displacement stroke;
FIG. 6 is a schematic cross-sectional view of a portion of the assembly of the present invention with a cylinder at half the displacement stroke;
fig. 7 is a schematic cross-sectional view of a part of the assembly of the present invention when the cylinder is at the minimum displacement stroke.
In the figure: 1. a puncture tube; 11. a connection sleeve; 111. a lower fixing plate; 2. an insulating head; 21. an insulating tube; 211. a central bore; 212. a mounting hole; 213. a lead-out hole; 214. a guide through hole; 22. an upper fixing plate; 23. a connecting plate; 3. an ablation electrode; 31. an electrode lead; 4. a pressure detecting member; 41. a pressure sensor; 42. a fixed rod; 5. a lifting driving mechanism; 51. a cylinder; 52. a driving member; 521. a connecting rod; 5211. a threading hole; 522. a connecting cylinder; 523. a first platen; 524. a second pressing plate; 6. a spring; 7. and a delivery tube.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 and 2, a radio frequency ablation device with a vapor-liquid guiding function comprises a device handle, a puncture tube 1, an insulation head 2 and a lifting driving mechanism 5, wherein the insulation head 2 is slidably arranged at the distal end of the puncture tube 1, the proximal end of the puncture tube 1 is connected to the device handle, and the device handle is connected with a radio frequency ablation system through a cable;
The insulation head 2 comprises an insulation tube 21, an ablation electrode 3, a pressure detection piece 4 and a vapor-liquid guiding piece are arranged in the insulation tube 21, and the pressure detection piece 4 and the vapor-liquid guiding piece are uniformly and alternately distributed around the ablation electrode 3;
After the insulating tube 21 reaches the position of a lesion tissue tumor in a human body, the ablation electrode 3 can be driven to reciprocate through the lifting driving mechanism 5, firstly, the ablation electrode 3 is independently contracted so that the gas-liquid guiding-out piece guides out tissue liquid on the surface of the lesion tissue tumor, the tissue liquid on the ablation electrode 3 is prevented from being smeared while the tissue liquid on the surface of the lesion tissue tumor is cleaned, and the problem that the tissue liquid is adhered to the surface of the ablation electrode due to high-temperature carbonization during subsequent radio-frequency ablation is avoided, so that the normal work of the ablation electrode is influenced; then, the ablation electrode 3 and the vapor-liquid guiding member synchronously shrink to enable the detection end of the pressure detection member 4 to extend out of the insulation tube 21 relatively and contact with the edge tissue of the lesion tissue tumor, whether the insulation tube 21 is vertically acted on the lesion tissue tumor is judged through the pressure values detected by the pressure detection members 4, if the pressure values detected by the pressure detection members 4 are consistent, the insulation tube 21 is vertical to the lesion tissue tumor, and if the pressure values detected by the pressure detection members 4 are inconsistent, the placement angle of the insulation tube 21 is adjusted until the insulation tube 21 is vertical to the lesion tissue tumor, so that the optimal ablation effect is realized; finally, the direction of the insulating tube 21 is kept unchanged, the ablation electrode 3 and the vapor-liquid guiding-out part are reset, and respectively carry out radio frequency ablation on the lesion tissue tumor and guide out the vapor generated at high temperature in real time, so that the vapor generated at high temperature during ablation is guided out in time, and the vapor burst is avoided.
When the invention is used, after the insulating tube 21 reaches the position of a lesion tissue tumor in a human body, the ablation electrode 3 is driven to reciprocate by the lifting driving mechanism 5, firstly, the ablation electrode 3 is independently contracted so as to facilitate the vapor-liquid guiding-out piece to guide out tissue liquid on the surface of the lesion tissue tumor, and the tissue liquid is prevented from being smeared on the ablation electrode 3 while the tissue liquid on the surface of the lesion tissue tumor is cleaned; then, the ablation electrode 3 and the vapor-liquid guiding member synchronously shrink to enable the detection end of the pressure detection member 4 to relatively extend out of the insulating tube 21 and contact with the edge tissue of the lesion tissue tumor, and the placement angle of the insulating tube 21 is regulated in an auxiliary manner until the insulating tube 21 is perpendicular to the lesion tissue tumor by the pressure values detected by the pressure detection members 4; finally, the direction of the insulating tube 21 is kept unchanged, the ablation electrode 3 and the vapor-liquid guiding member are reset, and the vapor-liquid guiding member guides out vapor generated by high-temperature ablation in time when the ablation electrode 3 carries out radio frequency ablation on the tumor of the lesion tissue.
Referring to fig. 1 and 2, further, a central hole 211 is formed in the middle of the insulating tube 21, and an equal number of uniformly distributed and staggered mounting holes 212 and guide holes 213 are formed on the insulating tube 21 outside the central hole 211;
the ablation electrode 3 and the pressure detection member 4 are respectively and slidably assembled in the central hole 211 and the mounting hole 212, the pressure detection member 4 is fixedly connected to the distal end of the puncture tube 1, the vapor-liquid guiding-out member is communicated with the guiding-out hole 213, and the vapor-liquid guiding-out member is connected with an external negative pressure device.
Referring to fig. 3, further, the lifting driving mechanism 5 includes a micro cylinder 51 and a driving member 52, the driving member 52 includes a connecting rod 521 and a connecting cylinder 522, the fixed end and the movable end of the micro cylinder 51 are fixedly connected with the puncture tube 1 and the connecting rod 521 respectively, the connecting cylinder 522 is fixedly connected with one end of the connecting rod 521 where the micro cylinder 51 is disposed, the ablation electrode 3 is fixedly installed at the other end of the connecting rod 521, and both the connecting rod 521 and the connecting cylinder 522 are slidably matched with the inner wall of the central hole 211, so that the connecting rod 521 and the connecting cylinder 522 can be driven to reciprocate along the inner wall of the central hole 211 by the micro cylinder 51, and then the ablation electrode 3 is driven to reciprocate inside the central hole 211.
Referring to fig. 3-5, further, the surface of the insulating tube 21 is uniformly provided with guide through holes 214 communicated with the inside of the central hole 211, the guide through holes 214 are respectively arranged between the adjacent mounting holes 212 and the guide out holes 213, and the opening ends of the guide through holes 214 are fixedly connected with the upper fixing plate 22; the distal end of the puncture tube 1 is provided with a connecting sleeve 11, the inner wall of the connecting sleeve 11 is in sliding fit with the outer wall of the insulating tube 21, the surface of the inner wall of the connecting sleeve 11 is uniformly provided with a lower fixing plate 111, the lower fixing plate 111 is respectively in sliding fit with the inner wall of a guide through hole 214, and springs 6 are respectively assembled between the lower fixing plate 111 and the upper fixing plate 22; the connecting cylinder 522 is uniformly provided with a first pressing plate 523 outside one end far away from the connecting rod 521, and the first pressing plate 523 is located outside the insulating tube 21. Specifically, when the micro cylinder 51 expands and contracts to the maximum displacement stroke amount, the spring 6 is in a natural extension state and the first pressing plate 523 is just in contact with the upper fixing plate 22, and the ablation electrode 3 is located at the end of the center hole 211.
Referring to fig. 5-7, the insulating tube 21 is uniformly provided with a connecting plate 23 on the surface, the connecting rod 521 is uniformly provided with a second pressing plate 524 on the surface, the connecting plate 23 and the second pressing plate 524 are in consistent shape and correspond to each other in position, and the connecting plate 23 is located between the lower fixing plate 111 and the second pressing plate 524. Specifically, the distance between the connection plate 23 and the second pressing plate 524, and the distance between the first pressing plate 523 and the upper fixing plate 22 are all equal to half the displacement stroke amount of the micro cylinder 51.
When the invention is used, the connecting rod 521 and the connecting cylinder 522 are driven by the micro cylinder 51 to retract and then extend, in the process that the micro cylinder 51 is contracted from the maximum displacement stroke amount to half displacement stroke amount (refer to fig. 5 and 6), the connecting rod 521 drives the ablation electrode 3 to gradually contract into the central hole 211, and when the micro cylinder 51 is contracted to half displacement stroke amount, tissue fluid on the surface of a lesion tissue tumor is sequentially led out of the device from the lead-out hole 213 and the vapor-liquid lead-out part through negative pressure; in the process that the micro cylinder 51 is contracted from half displacement stroke amount to the minimum displacement stroke amount (refer to fig. 6 and 7), the connecting rod 521 drives the connecting plate 23 to retract synchronously through the second pressing plate 524, the connecting plate 23 drives the insulating tube 21 and the upper fixing plate 22 to retract synchronously, the distance between the upper fixing plate 22 and the lower fixing plate 111 becomes larger gradually, the spring 6 stretches gradually, when the micro cylinder 51 is contracted to the minimum displacement stroke amount, the detection end of the pressure detection piece 4 is positioned outside the insulating tube 21 and contacts with the edge tissue of the lesion tissue tumor, and the placement angle of the insulating tube 21 is adjusted until the pressure values detected by the pressure detection pieces 4 are consistent, so that the insulating tube 21 is ensured to be perpendicular to the lesion tissue tumor; the placement angle of the insulating tube 21 is kept unchanged, the micro cylinder 51 is extended from the minimum displacement stroke amount to the maximum displacement stroke amount (refer to fig. 5), the ablation electrode 3 and the insulating tube 21 are reset, the ablation electrode 3 is electrified to perform radio frequency ablation on the lesion tissue tumor, the lesion tissue tumor is quickly heated and extinguished to be alive and necrotized, and meanwhile, vapor generated at high temperature is sequentially led out of the device from the lead-out hole 213 and the vapor-liquid lead-out part through negative pressure.
Further, the ablation electrode 3 is provided with an electrode wire 31, the surface of the connecting rod 521 is provided with a threading hole 5211, the electrode wire 31 extends from the inside of the threading hole 5211 to the inside of the puncture tube 1 and is connected with a radio frequency ablation system through a cable wire, and the part of the electrode wire 31 located inside the connecting rod 521 is arranged in a spiral shape capable of freely stretching and retracting, so that the electrode wire 31 can be freely adjusted in length without being pulled in the process that the ablation electrode 3 slides along the inner wall of the central hole 211.
Further, the vapor-liquid guiding-out part comprises a guiding-out pipe 7, wherein the guiding-out hole 213 is close to the inner wall of one end of the puncture pipe 1 and is in sliding fit with the outer wall of the guiding-out pipe 7, so that the length of the guiding-out pipe 7 can be freely adjusted in the process that the insulating pipe 21 slides along the inner wall of the connecting sleeve 11, and the guiding-out pipe 7 extends into the puncture pipe 1 and is communicated with an external negative pressure device.
Further, the pressure detecting member 4 includes a pressure sensor 41 and a fixing rod 42, the fixing rod 42 is fixedly connected to the distal end of the puncture tube 1, the pressure sensor 41 is fixedly installed at one end of the fixing rod 42 far away from the puncture tube 1, and a connection wire of the pressure sensor 41 extends from the inside of the fixing rod 42 to the inside of the puncture tube 1 and is connected with the radio frequency ablation system through a cable.
Further, the outer wall of one end of the connecting sleeve 11 far away from the puncture tube 1 is arranged into a smooth curved surface, so that the joint of the connecting sleeve 11 and the insulating tube 21 is smooth, and the puncture process of the connecting sleeve 11 and the insulating tube 21 in a human body is not hindered.
Working principle: after the insulating tube 21 reaches the position of a lesion tissue tumor in a human body, the connecting rod 521 and the connecting cylinder 522 are driven by the micro cylinder 51 to reciprocate along the inner wall of the central hole 211, so that the ablation electrode 3 is driven to reciprocate in the central hole 211, the connecting rod 521 drives the ablation electrode 3 to gradually shrink into the central hole 211 in the process that the micro cylinder 51 is shrunk from the maximum displacement stroke amount to half displacement stroke amount, and when the micro cylinder 51 is shrunk to half displacement stroke amount, tissue fluid on the surface of the lesion tissue tumor is sequentially led out of the device from the lead-out hole 213 and the vapor-liquid lead-out part through negative pressure; in the process that the micro cylinder 51 is contracted from half displacement stroke amount to the minimum displacement stroke amount, the connecting rod 521 drives the connecting plate 23 to synchronously retract through the second pressing plate 524, the connecting plate 23 drives the insulating tube 21 and the upper fixing plate 22 to synchronously retract, when the micro cylinder 51 is contracted to the minimum displacement stroke amount, the pressure sensor 41 at the end part of the fixing rod 42 is positioned outside the insulating tube 21 and is in contact with the edge tissue of the lesion tissue tumor, and the placement angle of the insulating tube 21 is adjusted until the pressure values detected by the pressure sensors 41 are consistent, so that the insulating tube 21 is ensured to be perpendicular to the lesion tissue tumor; the placement angle of the insulating tube 21 is kept unchanged, the micro cylinder 51 stretches from the minimum displacement stroke amount to the maximum displacement stroke amount, the ablation electrode 3 and the insulating tube 21 are reset, the ablation electrode 3 is electrified to conduct radio frequency ablation on a lesion tissue tumor, and meanwhile, vapor generated at high temperature is led out of the device from the lead-out hole 213 and the lead-out tube 7 in sequence through negative pressure.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a radio frequency ablation equipment with vapour and liquid derived function, includes equipment handle, puncture pipe (1), insulating head (2), lift actuating mechanism (5), its characterized in that: the insulation head (2) is slidably arranged at the far end of the puncture tube (1), the near end of the puncture tube (1) is fixedly connected to the equipment handle, and the equipment handle is connected with the radio frequency ablation system through a cable;
The insulation head (2) comprises an insulation tube (21), an ablation electrode (3), a pressure detection piece (4) and a vapor-liquid guiding-out piece are arranged in the insulation tube (21), and the pressure detection piece (4) and the vapor-liquid guiding-out piece are uniformly distributed around the ablation electrode (3) in a staggered mode;
A central hole (211) is formed in the middle of the insulating tube (21), and mounting holes (212) and guide-out holes (213) which are uniformly distributed in equal number and are arranged in a staggered manner are formed in the insulating tube (21) and are positioned outside the central hole (211);
The ablation electrode (3) and the pressure detection piece (4) are respectively and slidably assembled in the central hole (211) and the mounting hole (212), the pressure detection piece (4) is fixedly connected to the far end of the puncture tube (1), the vapor-liquid guiding-out piece is communicated with the guiding-out hole (213), and the vapor-liquid guiding-out piece is connected with an external negative pressure device; the external negative pressure device utilizes negative pressure to lead out tissue fluid on the surface of the lesion tissue tumor to the outside of the device from the lead-out hole (213) and the vapor-liquid lead-out piece in sequence; the pressure detecting member (4) includes a pressure sensor (41) and a fixing rod (42);
The lifting driving mechanism (5) comprises a micro cylinder (51) and a driving piece (52), the driving piece (52) comprises a connecting rod (521) and a connecting cylinder (522), the fixed end and the movable end of the micro cylinder (51) are respectively and fixedly connected with the puncture tube (1) and the connecting rod (521), the connecting cylinder (522) is fixedly connected with one end of the connecting rod (521) provided with the micro cylinder (51), the ablation electrode (3) is fixedly arranged at the other end of the connecting rod (521), and the connecting rod (521) and the connecting cylinder (522) are both in sliding fit with the inner wall of the central hole (211);
Guide through holes (214) communicated with the inside of the central hole (211) are uniformly formed in the surface of the insulating tube (21), the guide through holes (214) are respectively formed between the adjacent mounting holes (212) and the guide out holes (213), and an upper fixing plate (22) is fixedly connected to the opening end of the guide through holes (214);
The puncture device is characterized in that a connecting sleeve (11) is arranged at the far end of the puncture tube (1), the inner wall of the connecting sleeve (11) is in sliding fit with the outer wall of the insulating tube (21), lower fixing plates (111) are uniformly arranged on the surface of the inner wall of the connecting sleeve (11), the lower fixing plates (111) are respectively in sliding fit with the inner wall of the guide through hole (214), and springs (6) are respectively assembled between the lower fixing plates (111) and the upper fixing plates (22);
A first pressing plate (523) is uniformly arranged on the outer side of one end, far away from the connecting rod (521), of the connecting cylinder (522), and the first pressing plate (523) is positioned outside the insulating tube (21);
The surface of the insulating tube (21) is uniformly provided with a connecting plate (23), the surface of the connecting rod (521) is uniformly provided with a second pressing plate (524), the shape of the connecting plate (23) is consistent with that of the second pressing plate (524) and the positions of the connecting plate and the second pressing plate are in one-to-one correspondence, and the connecting plate (23) is positioned between the lower fixing plate (111) and the second pressing plate (524);
The maximum distance between the connecting plate (23) and the second pressing plate (524) and the maximum distance between the first pressing plate (523) and the upper fixing plate (22) are equal to half of the displacement stroke of the micro air cylinder (51); when the micro cylinder (51) stretches to the maximum displacement stroke, the spring (6) is in a natural stretching state, the first pressing plate (523) is just contacted with the upper fixing plate (22), and the ablation electrode (3) is positioned at the end part of the central hole (211); in the process that the micro cylinder (51) is contracted from the maximum displacement stroke amount to half displacement stroke amount, the connecting rod (521) drives the ablation electrode (3) to gradually contract into the center hole (211); when the micro cylinder (51) stretches to half of the displacement stroke, the second pressing plate (524) is just contacted with the connecting plate (23); in the process that the micro cylinder (51) is contracted from half displacement stroke amount to the minimum displacement stroke amount, the connecting rod (521) drives the connecting plate (23) to synchronously retract through the second pressing plate (524), the connecting plate (23) drives the insulating tube (21) and the upper fixing plate (22) to synchronously retract, and when the micro cylinder (51) is contracted to the minimum displacement stroke amount, the pressure sensor (41) at the end part of the fixing rod (42) is positioned outside the insulating tube (21); the micro cylinder (51) extends from the minimum displacement stroke amount to the maximum displacement stroke amount, and resets the ablation electrode (3) and the insulating tube (21).
2. A radio frequency ablation device with vapor-liquid delivery as set forth in claim 1 wherein: an electrode wire (31) is arranged on the ablation electrode (3), a threading hole (5211) is formed in the surface of the connecting rod (521), the electrode wire (31) extends from the inside of the threading hole (5211) to the inside of the puncture tube (1) and is connected with a radio frequency ablation system through a cable wire, and the part of the electrode wire (31) located inside the connecting rod (521) is in a spiral shape capable of freely stretching.
3. A radio frequency ablation device with vapor-liquid delivery as set forth in claim 1 wherein: the gas-liquid guiding-out part comprises a guiding-out pipe (7), the guiding-out hole (213) is close to the inner wall of one end of the puncture pipe (1) and is in sliding fit with the outer wall of the guiding-out pipe (7), and the guiding-out pipe (7) extends to the inside of the puncture pipe (1) and is communicated with an external negative pressure device.
4. A radio frequency ablation device with vapor-liquid delivery as set forth in claim 1 wherein: the pressure detection piece (4) comprises a pressure sensor (41) and a fixed rod (42), the fixed rod (42) is fixedly connected to the far end of the puncture tube (1), the pressure sensor (41) is fixedly installed at one end, far away from the puncture tube (1), of the fixed rod (42), and a connecting wire of the pressure sensor (41) extends from the inside of the fixed rod (42) to the inside of the puncture tube (1) and is connected with a radio frequency ablation system through a cable.
5. A radio frequency ablation device with vapor-liquid delivery as set forth in claim 1 wherein: the outer wall of one end of the connecting sleeve (11) far away from the puncture tube (1) is arranged into a smooth curved surface.
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| CN211094652U (en) * | 2019-09-20 | 2020-07-28 | 广东大凡医疗器械有限公司 | Bipolar ablation electrode with suction function |
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| CN108309435A (en) * | 2018-01-27 | 2018-07-24 | 刘晓华 | Radio frequency scalpel under a kind of mirror for surgical operation |
| CN110960314B (en) * | 2019-12-31 | 2021-06-15 | 杭州堃博生物科技有限公司 | Detection mechanism, radiofrequency ablation catheter and radiofrequency ablation system |
| CN113974821A (en) * | 2021-10-27 | 2022-01-28 | 上海交通大学 | A positioning-guided ablation probe |
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| CN106413796A (en) * | 2014-04-21 | 2017-02-15 | 富兰克林·J·张 | Devices and methods for transdermal fluid delivery |
| CN211094652U (en) * | 2019-09-20 | 2020-07-28 | 广东大凡医疗器械有限公司 | Bipolar ablation electrode with suction function |
| CN111494004A (en) * | 2020-06-02 | 2020-08-07 | 吉紫嫣 | Be used for not having nerve radio frequency ablation equipment and system of wound |
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