CN117503331A - Microwave ablation needle for cystic tumor - Google Patents
Microwave ablation needle for cystic tumor Download PDFInfo
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- CN117503331A CN117503331A CN202311694108.0A CN202311694108A CN117503331A CN 117503331 A CN117503331 A CN 117503331A CN 202311694108 A CN202311694108 A CN 202311694108A CN 117503331 A CN117503331 A CN 117503331A
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- copper pipe
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- needle tube
- insulating sleeve
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- 208000012106 cystic neoplasm Diseases 0.000 title claims abstract description 28
- 238000002679 ablation Methods 0.000 title claims abstract description 26
- 229910052802 copper Inorganic materials 0.000 claims abstract description 66
- 239000010949 copper Substances 0.000 claims abstract description 66
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 65
- 230000005855 radiation Effects 0.000 claims abstract description 31
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000002775 capsule Substances 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 206010011732 Cyst Diseases 0.000 claims description 7
- 208000031513 cyst Diseases 0.000 claims description 7
- 230000017074 necrotic cell death Effects 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 5
- 230000036425 denaturation Effects 0.000 claims description 4
- 238000004925 denaturation Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000011282 treatment Methods 0.000 abstract description 19
- 238000011010 flushing procedure Methods 0.000 abstract description 5
- 230000001338 necrotic effect Effects 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 238000011084 recovery Methods 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 abstract description 3
- 238000000605 extraction Methods 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 230000002980 postoperative effect Effects 0.000 abstract description 3
- 238000004140 cleaning Methods 0.000 abstract description 2
- 238000011298 ablation treatment Methods 0.000 abstract 1
- 206010028980 Neoplasm Diseases 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- 201000011510 cancer Diseases 0.000 description 3
- 210000002726 cyst fluid Anatomy 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 208000002847 Surgical Wound Diseases 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000035876 healing Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000877 morphologic effect Effects 0.000 description 2
- 238000002560 therapeutic procedure Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000034994 death Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000003176 fibrotic effect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000003211 malignant effect Effects 0.000 description 1
- 239000002504 physiological saline solution Substances 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 210000004881 tumor cell Anatomy 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
- A61B18/1815—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves
-
- 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
-
- 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
- A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
- A61B18/1815—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves
- A61B2018/1869—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using microwaves with an instrument interstitially inserted into the body, e.g. needles
Landscapes
- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biomedical Technology (AREA)
- Medical Informatics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Heart & Thoracic Surgery (AREA)
- Otolaryngology (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
A microwave ablation needle for cystic tumor, includes radiation head, insulating sleeve, copper pipe, handle and mouth of a river connecting seat and temperature sensor, characterized by: the copper pipe is riveted and welded with the radiation head, the copper pipe is communicated with the inner hole of the radiation head and matched with the side hole of the needle tube and the inner cavity of the handle to form a channel together, and the channel is used for extracting the content of the bag and discharging the liquid or gas (releasing pressure) in the bag and filling cleaning liquid or heating medium into the bag; the copper pipe is used as a microwave feeder line; the insulating sleeve is tightly sleeved outside the copper pipe and is attached to the body of the radiation head; the rear end of the copper pipe is welded with a microwave socket core wire, and the needle tip corrugated surface can guide ultrasonic waves to realize accurate intervention; the invention has simple structure and low cost; the discharge of hot steam and the extraction of the content in the treatment process are facilitated, the pressure is reduced, the pain is reduced, and the necrotic tissue is cleared by flushing after the treatment is finished, so that the postoperative recovery can be accelerated; the ablation treatment of the cystic tumor is possible by controlling the liquid temperature field, and the quality is controlled; copper pipe payload is big, high output shortens treatment time, improves operation efficiency.
Description
Technical Field
The application relates to the technical field of microwave ablation needles, in particular to a microwave ablation needle for cystic tumors.
Background
The microwave ablation is to insert a microwave ablation needle into a cancer focus of human tissue, and the front end of the cancer focus is provided with a radiation head (microwave antenna)
Transmitting microwaves, vibrating polar molecules in tumor cells at high frequency in a microwave electric field to generate friction heat, and when the temperature reaches 45 ℃ or above, carrying out denaturation, solidification and death on proteins of tissue cells to achieve the aim of treating cancer by microwave interventional operation (physical ablation). However, existing microwave ablation needles are not suitable for interventional therapy of cystic tumors. The common cystic tumor has a plurality of fibrotic wrapping tissues, the capsule has liquid or a separation cavity or tumor tissues, and the morphological spheroids have obvious demarcations.
For the tumors, the clinical treatment is mostly surgical excision, and the conditions of large surgical wound area, great pain, high cost, long postoperative recovery period and the like exist. At present, the interventional therapy is mostly to pump liquid in the capsule under the guidance of ultrasound, then pour in the hardening agent again (such as high-concentration ethanol, which causes deformation necrosis of the capsule wall tissue), and in general, it is difficult to completely realize the deformation necrosis of the capsule wall tissue at one time, and the recurrence of cyst is mostly caused.
For the clinical treatment of cystic tumors (malignant or benign), most of them are: the method of puncturing, pumping out the cyst fluid and injecting the hardening agent to make the cyst fluid necrotize can also be used for cutting the cyst fluid by adopting open surgery. The former has a long treatment period, and the latter has a large surgical wound.
Disclosure of Invention
In order to eliminate the defects of the cystic tumor treatment means and meet the clinical treatment requirement of the cystic tumor, the invention provides a microwave ablation needle for the cystic tumor; in order to solve the technical problems, the technical scheme provided by the invention is as follows: a microwave ablation needle for cystic tumor comprises a radiation head, an insulating sleeve, a needle tube, a copper tube, a water gap connecting seat, a microwave socket, a handle, an end cover, a sealing ring, a temperature sensor and a wire; the method is characterized in that: the front end of the copper pipe is spliced and rivet welded with the middle hole of the radiation head, and the inner hole of the copper pipe is communicated with the middle hole and the holes on the two sides of the radiation head; the insulating sleeve is sleeved on the outer surface of the front section of the copper pipe and clings to the body of the radiation head; the front section of the needle tube is sleeved on the outer surface of the rear section of the insulating sleeve; the rear end of the copper pipe is welded with the core wire of the microwave socket; the shell of the microwave socket is welded with the rear end opening of the needle tube.
The copper pipe is made of pure copper, the outer diameter of the copper pipe is more than or equal to 0.8mm, and a side hole is formed in the side wall of the rear section of the copper pipe; the aperture of the side hole is more than or equal to 0.5mm; the outer surface of the copper pipe can be coated with an insulating layer; the inner diameter of the copper pipe is more than or equal to 0.5mm.
The needle tube is made of stainless steel materials, the outer diameter of the needle tube is more than or equal to 1.2mm, the outer surface of the needle tube is provided with scale marks in cm, and the needle tube is sleeved outside the insulating sleeve and the copper tube, penetrates through the handle and the end cover and is adhered with the handle middle hole and the end cover middle hole; the side hole of the back section of the needle tube corresponds to the side hole of the back section of the copper tube and is positioned in a sealed cavity formed by the handle and the end cover, and the aperture of the side hole of the needle tube is more than or equal to 0.5mm; the length of the needle tube is longer than the depth of the interventional tissue cyst; the water gap connecting seat is adhered in the side hole of the end cover.
The insulating sleeve is sleeved on the outer surface of the front section of the copper pipe, the middle and rear sections of the insulating sleeve are inserted into the inner holes of the front section of the needle tube, and the copper pipe and the needle tube are isolated (in an insulating state) by means of the front section of the insulating sleeve.
The sensor main body of the temperature sensor and the lead is arranged in the inner cavity of the front section of the copper pipe, and the lead extends to the outer surface of the handle end cover. The intermittent action of the microwave generator can be monitored and controlled through the electrical component, so that the temperature of tissues and liquid (medium) in a microwave thermal field is in the range of 42-100 ℃ (recommended 45-75 ℃), and the action time is based on the complete denaturation and necrosis of cystic tumor (capsule wall) tissues (according to different forms of the cystic tumor and the recommended time of 15-45 min).
The invention adopts the following structure: the copper pipe is riveted and welded with the radiation head, and the copper pipe is communicated with the middle hole of the radiation head to form a flushing fluid entering channel; the longitudinal groove of the radiation head and the inner hole groove of the insulating sleeve are overlapped to form a side hole channel, and the side hole channel and the inner wall of the needle tube form a reflux passage of flushing fluid together; the copper pipe is used as a microwave feeder line; the insulating sleeve is tightly sleeved outside the copper pipe and is attached to the body of the radiation head; the insulating tube is inserted into the inner hole of the needle tube to form sliding seal; the rear end of the copper pipe is welded with a microwave socket core wire, and the tip of the stupefied conical surface can reflect sound waves to lay a foundation for entering guide to realize accurate medical treatment; the structure is simple, and the cost is low; through the multipath channels on the radiation head side, the discharge of hot steam and the extraction of contents in the treatment process are facilitated, the pressure is reduced, the pain is reduced, and the necrotic tissue is cleared by flushing after the treatment is finished, so that the postoperative recovery can be accelerated; the effective load of the copper pipe is increased, the output power can be improved, the treatment time is shortened, and the operation efficiency is improved.
Drawings
FIG. 1 is an exploded schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of the overall structure of the invention with all parts fully assembled;
FIG. 3 is a schematic drawing of the extraction content (liquid) circulation path of the present invention;
legend description:
1-radiation head: 1 a-a needle part; 1 b-body; 1 c-side holes on both sides of the needle tip and communicated with the middle hole; 1 d-tail mesopores;
2-insulating sleeve: 2 a-front section; 2 b-middle-rear section;
3-needle tube: 3 a-front end; 3 b-an inner bore of the anterior segment; 3 c-side holes in the posterior segment; 3 d-scale marks;
4-copper pipe: 4 a-front end; 4 b-rear end; 4 c-side holes in the posterior segment;
5-water gap connecting seat:
6-microwave socket: 6 a-core wire; 6 b-a housing;
7-handle: 7 a-an inner hole at the front end of the handle; 7 b-the rear end of the handle;
8-end cap: 8 a-end cap mesopores; 8 b-a rear plug edge; side hole of 8c end cap
9-sealing ring: 9 a-the front end of the sealing ring; 9 b-middle and rear sections of the sealing ring;
10-temperature sensor and wire: 10 a-a sensor body; 10 b-wire.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
FIG. 1 is an exploded schematic view of the overall structure of the present invention: a microwave ablation needle for a cystic tumor, comprising: the device comprises a radiation head 1, an insulating sleeve 2, a needle tube 3, a copper tube 4, a water inlet interface 5, a microwave socket 6, a handle 7, an end cover 8, a sealing ring 9, a temperature sensor and a wire 10 of the temperature sensor.
As can be seen from the figure: the radiation head 1 is made of metal material, the front end of the radiation head is a needle part 1a with a conical tip, and the conical tip of the needle part 1a can be a cone or a polygonal pyramid; the radiation head 1 has a cylindrical body 1b, a middle hole 1d in the body, and side holes 1c communicating with the middle hole on both sides of the needle 1 a.
The insulating sleeve 2 is made of insulating material (polytetrafluoroethylene), and the outer diameter 2b of the front section 2a is equal to the outer diameters of the radiation head body 1b and the needle tube 3; the inner diameter of the insulating sleeve 2 is equal to the outer diameter of the copper pipe 4; the outer diameter of the middle rear section 2b of the insulating sleeve 2 is equal to or slightly smaller than the inner diameter of the needle tube 3.
In the figure, the needle tube 3 is a hollow tube made of stainless steel material, the outer diameter 2b of the hollow tube is more than or equal to 1.2mm, a side hole 3c is arranged at the rear section of the needle tube 3, and the aperture of the side hole is more than or equal to 0.5mm; graduation lines 3d are formed on the outer surface between the side hole 3c at the rear end of the needle tube and the front end 3a of the needle tube, and the insertion depth (in cm) of the needle tube is marked; the length of the needle tube 3 is larger than the depth of the insertion of the tissue cyst.
FIG. 2 is a schematic illustration of the structure of a microwave ablation needle for cystic tumors of the present invention with all parts in combination intact; as can be seen from the figure, the front end of the copper tube 4 is embedded in the middle hole 1d of the body 1b of the radiation head 1 for riveting or welding, and the inner hole of the copper tube 4 is communicated with the middle hole 1d of the radiation head 1 and the two side holes 1c of the needle point part; the insulating sleeve 2 is sheathed on the outer surface of the connecting part of the front section of the copper pipe 4, and the front edge of the front section 2a is tightly attached to the body part 1b of the radiation head 1; the front section 2a and the rear section 2e of the insulating sleeve 2 together completely separate the radiation head 1 and the copper tube 4 from the needle tube 3 (insulating state).
Referring to FIG. 1, copper tube 4 is a hollow tube of high conductivity made of purple (pure) copper, having an outer diameter of 0.8mm or more, and having a front end 4a tightly fitted with and riveted or welded to a middle hole 1d of radiation head body 1b; a side hole 4c is formed in the side wall of the rear section of the copper pipe, and the diameter of the side hole is more than or equal to 0.5mm; the position of the side hole corresponds to the position of the side hole of the needle tube; the rear end 4b of the copper pipe 4 is welded with a core wire 6a of the microwave socket 6; the housing 6b of the microwave receptacle 6 is welded to the rear port of the needle tube 3.
In the figure: the needle tube 3 is sleeved with the copper tube 2 and then passes through an inner hole 7a at the front end of the handle 7 and a middle hole 8a at the front end of the end cover 8; the two holes are sealed and bonded with the outer surface of the needle tube 3; the side hole 3c of the needle tube 3 corresponds to the side hole 4c of the copper tube 4 and is arranged in a cavity formed by the rear end of the handle 7 and the end cover plugging edge 8b in a sealing way; the rear end 9b of the end cover 9 is provided with a middle hole 9c, and a water inlet connecting seat 5 is adhered in the hole.
In the figure: the temperature sensor and the lead 10 thereof are arranged in the inner cavity of the copper pipe, the sensor body 10a is arranged in the inner cavity of the front section of the copper pipe, and the lead 10b is led out from the tail part (end cover) of the handle.
FIG. 3 is a schematic view of the path of the microwave ablation needle for cystic tumor of the invention for extracting the contents for decompression, discharging hot vapor and injecting rinsing liquid during treatment; from the figure, the liquid path is constituted by the following paths: when liquid is pumped or filled, a medium enters a cavity formed by 7 end covers 8 of the handle through the water gap connecting seat 5, enters the inner cavity of the copper tube through the side hole 3c of the needle tube 3 and the side hole 4c of the copper tube 4, and enters the inner cavity of the cyst through the middle hole 1d of the radiation head and the two side holes 1c at the front end of the radiation head. By means of a syringe or similar device, a washing liquid or a heating medium (physiological saline, ethanol) can be injected, and necrotic tissue can also be extracted and/or heated vapour can be discharged (release and reduction of the intracapsular pressure).
During microwave treatment, due to the heat energy conversion of microwave energy, a large amount of hot steam is generated to increase the pressure in the capsule, pain or other injuries are caused, the air is necessarily exhausted through the open channel, and the content of the capsule can be extracted through the device to perform pressure reduction measures in advance; in the treatment process, the temperature of the tissue of the capsule cavity is monitored in the intermittence of microwave pulse by a temperature sensor, and the intermittence of a microwave generator is controlled, so that the temperature of the tissue and liquid (medium) in a microwave thermal field is in the range of 42-100 ℃ (recommended 45-75 ℃), and the action time is based on the complete denaturation and necrosis of the tissue of the cystic tumor (capsule wall) (according to the different forms of the cystic tumor and the recommended time is 15-45 min). Before the treatment is finished, the cyst can be washed by distilled water, so that the deposition of necrotic tissues is reduced, and the healing after operation is accelerated.
In the figure, the water gap connecting seat 5 is a hollow tube made of metal material, and an international standard luer interface of the interface can be reliably connected with a standard syringe or related appliances.
Compared with the microwave ablation needle applied in the current market, the microwave ablation needle for cystic tumor has the following improvements and characteristics:
because the copper pipe is adopted as the microwave feeder line and the needle tube is adopted as the double-tube structure for shielding protection, the structural design of the ablation needle is greatly simplified, and the cost is reduced;
because the copper pipe is adopted as the microwave feeding core wire, the current-carrying capacity of the microwave feeding core wire is greatly improved, the effective load power transmission is improved, the treatment time can be shortened, and the working efficiency is improved;
due to the adoption of the structure of the inner and outer channels of the ablation needle consisting of the middle hole and the side hole of the radiation head, the inner cavity of the copper tube, the side hole of the copper tube and the side hole of the needle tube, the purposes of extracting, cleaning and replacing cyst contents in the microwave ablation process (before, during and after the ablation needle operation) and synchronously discharging hot steam generated in a middle heat field in the treatment process to realize pressure reduction and pain avoidance can be realized; before the treatment is finished, the flushing liquid is injected, the coagulated necrotic tissue is discharged, the residual is reduced, the healing can be accelerated, and the recovery time is shortened.
The invention adopts a mode of heating medium (liquid) in the capsule by means of microwaves and controlling the temperature of the medium (liquid) in a proper denaturing necrosis temperature field range, can thoroughly ablate (denature necrosis) the non-volume and morphological cystic tumor and the capsule wall thereof in a microwave ablation mode, and does not damage normal tissues outside the capsule wall to the minimum extent.
The temperature sensor is adopted to monitor the microwave thermal field in real time, so that the temperature of the thermal field can be controlled, the damage to normal tissues is avoided, and the carbonization of the tissues caused by the excessive temperature can be prevented.
The foregoing description is only illustrative of the preferred embodiments of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof, and any modifications, equivalents, improvements or changes that fall within the principles of the present invention should be included in the scope of protection of the present invention.
Claims (5)
1. A microwave ablation needle for cystic tumor comprises a radiation head (1), an insulating sleeve (2), a needle tube (3), a copper tube (4), a water gap connecting seat (5), a microwave socket (6), a handle (7), an end cover (8), a sealing ring (9), a temperature sensor and a wire (10); the method is characterized in that: the front end (4 a) of the copper pipe is spliced and rivet welded with the middle hole (1 d) of the radiation head, and the inner hole of the copper pipe (4) is communicated with the middle hole (1 d) and the two side holes (1 c) of the radiation head (1); the insulating sleeve (2) is sleeved on the outer surface of the front section of the copper pipe (4) and is clung to the radiation head body (1 b); the front section of the needle tube (3) is sleeved on the outer surface of the rear section (2 b) in the insulating sleeve (2); the rear end (4 b) of the copper pipe is welded with a core wire (6 a) of the microwave socket (6); the shell (6 b) of the microwave socket is welded with the rear port of the needle tube (3).
2. A microwave ablation needle for cystic tumors as defined in claim 1, wherein: the copper pipe (4) is made of pure copper, the outer diameter of the copper pipe is more than or equal to 0.8mm, and a side hole (4 c) is formed in the side wall of the rear section of the copper pipe; the aperture of the side hole is more than or equal to 0.5mm; the outer surface of the copper pipe can be coated with an insulating layer; the inner diameter of the copper pipe (4) is more than or equal to 0.5mm.
3. A microwave ablation needle for cystic tumors as defined in claim 1, wherein: the needle tube (3) is made of stainless steel materials, the outer diameter of the needle tube is more than or equal to 1.2mm, graduation marks (3 d) (in cm) are formed on the outer surface of the needle tube, the needle tube (3) is sleeved outside the insulating sleeve (2) and the copper tube (4), penetrates through the handle (7) and the end cover (8) and is adhered to the handle middle hole (7 a) and the end cover middle hole (8 a); the side hole (3 c) at the back section of the needle tube (3) corresponds to the side hole (4 c) at the back section of the copper tube (4) and is positioned in a sealed cavity formed by the handle (7) and the end cover (8), and the aperture of the side hole (3 c) of the needle tube is more than or equal to 0.5mm; the length of the needle tube (3) is larger than the depth of the interventional tissue cyst; the water gap connecting seat (5) is adhered in the side hole (8 c) of the end cover.
4. A microwave ablation needle for cystic tumors as claimed in claim 1, wherein; the insulating sleeve (2) is sleeved on the outer surface of the front section of the copper pipe (4), the middle rear section (2 e) of the insulating sleeve (2) is inserted into the inner hole of the front section of the needle tube (3), and the copper pipe (4) and the needle tube (3) are isolated (in an insulating state) by means of the front section (2 a) of the insulating sleeve (2).
5. A microwave ablation needle for cystic tumors as defined in claim 1, wherein: the sensor body (10 a) of the temperature sensor and the lead (10) is arranged in the inner cavity of the front section of the copper pipe, and the lead extends to the outer surface of the handle end cover (8). The intermittent action of the microwave generator can be monitored and controlled through the electrical component, so that the temperature of tissues and liquid (medium) in a microwave thermal field is in the range of 42-100 ℃ (recommended 45-75 ℃), and the action time is based on the complete denaturation and necrosis of cystic tumor (capsule wall) tissues (according to different forms of the cystic tumor and the recommended time of 15-45 min).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311694108.0A CN117503331A (en) | 2023-12-11 | 2023-12-11 | Microwave ablation needle for cystic tumor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311694108.0A CN117503331A (en) | 2023-12-11 | 2023-12-11 | Microwave ablation needle for cystic tumor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117503331A true CN117503331A (en) | 2024-02-06 |
Family
ID=89751336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311694108.0A Pending CN117503331A (en) | 2023-12-11 | 2023-12-11 | Microwave ablation needle for cystic tumor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117503331A (en) |
-
2023
- 2023-12-11 CN CN202311694108.0A patent/CN117503331A/en active Pending
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