CN117694993A - Plasma jet tool bit - Google Patents
Plasma jet tool bit Download PDFInfo
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- CN117694993A CN117694993A CN202211100171.2A CN202211100171A CN117694993A CN 117694993 A CN117694993 A CN 117694993A CN 202211100171 A CN202211100171 A CN 202211100171A CN 117694993 A CN117694993 A CN 117694993A
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- pipe
- rear end
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Abstract
The invention discloses a plasma jet cutter head, which belongs to the field of medical appliances and comprises a handle and a cutter head assembly; the tool bit assembly comprises an insulating outer wall, an insulating medium pipe is arranged in the insulating outer wall, a needle-shaped high-voltage electrode and an annular ground electrode are sleeved on the outer wall of the insulating medium pipe in the insulating outer wall, and the annular ground electrode is positioned in front of the needle-shaped high-voltage electrode; the insulation outer wall is provided with an attraction channel outside the insulation outer wall; the handle is provided with a power cable, an air inlet pipe and a suction pipe, a high-voltage wire and a ground wire of the power cable are respectively connected with the needle-shaped high-voltage electrode and the annular ground electrode, the air inlet pipe is connected with the plasma channel, and the suction pipe is connected with the suction channel. The integrated plasma jet tool bit does not need to be temporarily assembled, the operation is simpler and more convenient, the front end of the tool bit assembly can smoothly go deep to the focus part for operation, the integrated plasma jet tool bit is suitable for clinical use, and the suction channel and the suction tube can easily discharge waste gas in the operation process.
Description
Technical Field
The invention relates to the field of medical appliances, in particular to a plasma jet tool bit.
Background
The treatment of tumor is mainly by operation excision, but is influenced by various factors, and the operation has certain difficulty, especially the intracranial malignant tumor with high death and disability rate, which is mostly indistinct with normal brain tissue, the operation is difficult to thoroughly excision, the tumor recurrence rate is high, and the prognosis of the patient is poor, so that the operation is needed for many times or the auxiliary treatment of chemotherapy and radiotherapy is needed. Chemotherapy has been paid attention as a comprehensive/palliative treatment means, but the treatment effect of intracranial malignant tumor chemotherapy is not ideal due to the existence of a blood brain barrier, and the traditional cytotoxic chemotherapy drugs lack of specificity, so that the traditional cytotoxic chemotherapy drugs have more common and even serious toxicity to normal tissues and organs. Radiation therapy is an important auxiliary treatment means for intracranial tumors, but the side effect of radiation therapy is not ignored, the radiation brain injury is one of serious complications after radiation therapy, cerebral edema with different degrees can occur, and the serious patients produce radiation brain necrosis and even form cerebral softening.
Because of the specificity of brain tissue, when the intracranial tumor invades brain tissue, nerves and blood vessels, the operation is difficult to thoroughly remove the tumor in order to protect the nerve function, and partial tumor cells remain outside the operation cutting edge. Therefore, after the tumor is resected by operation, a certain auxiliary treatment measure is adopted to induce the apoptosis of the residual tumor cells, inhibit the proliferation and migration of the residual tumor cells, and is important to improve the effect of the operation treatment of the intracranial tumor.
Cold plasma is a charged particle group generated by ionizing a working gas by an external high voltage under atmospheric pressure, and is generally composed of ions, electrons, radicals, various active particles, and the like. The application of cold plasma in the biomedical field is receiving more and more attention, and many researches prove that the cold plasma can effectively inactivate various bacteria, fungi, viruses and other pathogenic microorganisms, and has very good research results in dental treatment, cosmetology, hemostasis and anti-inflammation, wound healing, skin disease treatment and tumor treatment. Cold plasma techniques can be used as an adjunct to surgery, particularly in tumor therapy. The plasma is ejected along with the airflow, so that the plasma is called as plasma jet, is close to room temperature, can effectively inhibit proliferation and migration capacity of tumor cells, induces apoptosis of the tumor cells, and does not damage normal tissues.
However, at present, a simple discharging device is mainly adopted to form plasma jet, temporary assembly is needed in the working process, the operation is complex, the operation on the surface can be only carried out, the operation cannot be carried out deep into the focus part, and the plasma jet is not suitable for clinical use.
Disclosure of Invention
The invention provides a plasma jet tool bit, which can be directly used without temporary assembly, is simpler and more convenient to operate, the front end of a tool bit assembly can smoothly go deep to the focus part to operate, is suitable for clinical use, and the suction channel and the suction tube can easily discharge waste gas in the operation process.
The technical scheme provided by the invention is as follows:
a plasma jet cutter head comprises a handle and a cutter head assembly which are sequentially connected from back to front;
the tool bit assembly comprises a tubular insulating outer wall, an insulating medium pipe is arranged in the insulating outer wall, plasma channels penetrating through the front end and the rear end of the insulating medium pipe are arranged in the insulating medium pipe, and the front end of the insulating medium pipe extends out of the front end of the insulating outer wall for a first distance; the needle-shaped high-voltage electrode is arranged in the insulating medium pipe, an annular ground electrode is sleeved on the outer wall of the insulating medium pipe in the insulating outer wall, the annular ground electrode is positioned in front of the needle-shaped high-voltage electrode, and a second distance is reserved between the front end of the needle-shaped high-voltage electrode and the rear end of the annular ground electrode; the outer insulating wall is provided with an attraction channel outside the outer insulating wall;
the handle is provided with a power cable, an air inlet pipe and a suction pipe, a high-voltage wire and a ground wire of the power cable are respectively connected with the needle-shaped high-voltage electrode and the annular ground electrode, the air inlet pipe is connected with a plasma channel of the insulating medium pipe, and the suction pipe is connected with the suction channel.
Further, the insulating outer wall comprises a first insulating tube and a second insulating tube, the insulating medium tube is positioned inside the first insulating tube, the front end of the insulating medium tube extends out of the front end of the first insulating tube by a third distance, and the annular ground electrode is positioned on the insulating medium tube in front of the first insulating tube; the second insulating tube is coated on the outer side of the first insulating tube, and the front end of the insulating medium tube extends out of the front end of the second insulating tube by a first distance.
Further, a tubular insulating structure is arranged between the insulating medium tube and the second insulating tube in front of the annular ground electrode, the front end of the tubular insulating structure extends out of the front end of the second insulating tube by a fourth distance, and the fourth distance is smaller than the first distance.
Further, the insulating medium pipe and the first insulating pipe are sealed and bonded through first sealant, and the insulating medium pipe and the second insulating pipe are sealed and filled through second sealant.
Further, a handle cavity is formed in the handle, and the rear end of the cutter head assembly is inserted into the front end of the handle cavity from the front end of the handle.
Further, the power cable is connected to the rear end of the handle, the power cable enters the handle cavity from the rear end of the handle and passes forward to the front end of the handle cavity, the rear end of the first insulating tube is provided with a sealing plug, the needle-shaped high-voltage electrode passes through the sealing plug to be fixed, the front end and the rear end of the needle-shaped high-voltage electrode are respectively located at the front side and the rear side of the sealing plug, the high-voltage wire of the power cable is connected with the rear end of the needle-shaped high-voltage electrode through a connecting terminal, and the ground wire of the power cable passes through a gap between the first insulating tube and the second insulating tube and is connected with the annular ground electrode.
Further, the air inlet pipe is connected to the rear end of the handle, the air inlet pipe enters the handle cavity from the rear end of the handle and penetrates forward to the front end of the handle cavity, an air cavity is arranged in the first insulating pipe, the rear end of the plasma channel of the insulating medium pipe is communicated with the air cavity, an air inlet channel is arranged at the front end of the air inlet pipe, and the air inlet channel penetrates through the sealing plug and is communicated with the air cavity.
Further, the suction tube is connected to the rear end of the handle, enters the handle cavity from the rear end of the handle and passes forward to the front end of the handle cavity, and the front end of the suction tube is connected to the rear end of the suction channel.
Further, the needle-shaped high-voltage electrode and the annular ground electrode are made of solid metal, the insulating medium pipe is made of ceramic or glass, the first insulating pipe, the second insulating pipe and the tubular insulating structure are made of ceramic or plastic, the suction channel and the air inlet channel are made of high polymer materials, the sealing plug is made of soft materials, the connecting terminal is made of solid metal, and the first sealant and the second sealant are made of epoxy resin structural adhesive.
Further, the second distance between the front end of the needle-shaped high-voltage electrode and the rear end of the annular ground electrode is 0.5-1.5cm, and the distance between the front end of the annular ground electrode and the front end of the insulating medium tube is 0.5-1.5cm.
The invention has the following beneficial effects:
the integrated plasma jet tool bit is designed, and the integrated plasma jet tool bit can be directly used during operation without temporary assembly, so that the operation is simpler and more convenient; the needle-shaped high-voltage electrode and the annular ground electrode generate plasma, the air inlet pipe and the insulating medium pipe convey the plasma to the front end of the cutter head assembly, and the front end of the cutter head assembly can smoothly go deep to the focus part for operation, so that the needle-shaped high-voltage electrode and the annular ground electrode are suitable for clinical use; the suction channel and the suction tube can easily discharge the waste gas in the operation process.
Drawings
FIG. 1 is a schematic view of the overall structure of a plasma jet tool bit of the present invention;
fig. 2 is a schematic view of the internal structure of the plasma jet tool bit of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
The invention provides a plasma jet cutter head, which is shown in fig. 1-2, and comprises a handle 1 and a cutter head assembly 2 which are sequentially connected from back to front.
The tool bit assembly 2 comprises a tubular insulating outer wall 3, an insulating medium pipe 4 is arranged in the insulating outer wall 3, plasma channels 5 penetrating through the front end and the rear end of the insulating medium pipe 4 are arranged in the insulating medium pipe 4, and the front end of the insulating medium pipe 4 extends out of the front end of the insulating outer wall 3 by a first distance.
A needle-shaped high-voltage electrode 6 is arranged in the insulating medium pipe 4, an annular ground electrode 7 is sleeved on the outer wall of the insulating medium pipe 4 in the insulating outer wall 3, the annular ground electrode 7 is positioned in front of the needle-shaped high-voltage electrode 6, and a second distance is reserved between the front end of the needle-shaped high-voltage electrode 6 and the rear end of the annular ground electrode 7; the insulating outer wall 3 is provided with a suction channel 8 outside the insulating outer wall 3, the front end of the suction channel 8 is at a certain distance behind the front end of the insulating medium pipe 4, and the suction channel 8 is communicated front and back.
The handle 1 is provided with a power cable 9, an air inlet pipe 10 and a suction pipe 11, a high-voltage wire 12 and a ground wire 13 of the power cable 9 are respectively connected with the needle-shaped high-voltage electrode 6 and the annular ground electrode 7, the air inlet pipe 10 is connected with the plasma channel 5 of the insulating medium pipe 4, and the suction pipe 11 is connected with the suction channel 6.
Before the plasma jet tool bit is matched with a surgical system for use, a power cable 9 is connected with a power supply, an air inlet pipe 10 is connected with an inert gas supply device, and a suction pipe 11 is connected with a negative pressure suction system. When the insulating medium tube is used, a power supply is turned on, output power and air flow are regulated, inert gas is introduced into the air inlet tube 10, the air flow control valve is opened, and the inert gas enters the plasma channel 5 of the insulating medium tube 4 through the air inlet tube 10. The foot switch connected to the operation system is started, high voltage is applied to the needle-shaped high-voltage electrode 6, inert gas is excited in the plasma channel 5 in the insulating medium pipe 4 between the needle-shaped high-voltage electrode 6 and the annular ground electrode 7 to generate plasma, the insulating medium pipe 4 is used for blocking an electrode electric field, and the adopted discharge mode is needle-annular (namely needle-shaped high-voltage electrode-annular ground electrode) dielectric barrier discharge.
Along with the transportation of the gas in the plasma channel 5, the plasma is ejected from the front port of the insulating medium pipe 4 to form a plasma jet, so that the discharge area and the working area between the electrodes are separated in space, and the plasma jet directly transports the active substances and charged ions to the residual tumor surface of the target area to achieve the treatment effect.
The integrated plasma jet tool bit is designed, and the integrated plasma jet tool bit can be directly used during operation without temporary assembly, so that the operation is simpler and more convenient; the needle-shaped high-voltage electrode and the annular ground electrode generate plasma, the air inlet pipe and the insulating medium pipe convey the plasma to the front end of the cutter head assembly, and the front end of the cutter head assembly can smoothly go deep to the focus part for operation, so that the needle-shaped high-voltage electrode and the annular ground electrode are suitable for clinical use; the suction channel and the suction tube can easily discharge the waste gas in the operation process.
Although there are some theoretical developments on cold plasma technology at present, there is no report on application of cold plasma in skull base tumors such as pituitary tumor, etc., because of the specificity of skull base dissection, skull base tumors often travel through important blood vessels and nerves of skull base, invade and wrap important structures of skull base, make tumor complete cutting difficult, and easily recur residual tumors. The plasma jet tool bit disclosed by the invention can induce apoptosis of residual tumor cells and bacteria through cold plasma jet and can not damage normal tissues, so that the plasma jet tool bit disclosed by the invention is used for assisting a low-temperature plasma cutting ablation operation, after a tumor is resected, tumors possibly remained on the surfaces of important blood vessels and nerves at the skull base are treated by the plasma jet tool bit, the tumor resecting efficiency is improved, and simultaneously, tumor recurrence and postoperative infection are effectively reduced.
As an improvement of the present invention, the insulating outer wall 3 includes a first insulating tube 14 and a second insulating tube 15, the insulating medium tube 4 is located inside the first insulating tube 14, the front end of the insulating medium tube 4 extends out of the front end of the first insulating tube 14 by a third distance, and the annular ground electrode 7 is located on the insulating medium tube 4 in front of the first insulating tube 14. The second insulating tube 15 is wrapped on the outer side of the first insulating tube 14, and the front end of the insulating medium tube 4 extends out of the front end of the second insulating tube 15 by a first distance.
A tubular insulating structure 16 is arranged between the insulating medium pipe 4 and the second insulating pipe 15 in front of the annular ground electrode 7, and the front end of the tubular insulating structure 16 extends out of the front end of the second insulating pipe 15 by a fourth distance which is smaller than the first distance, namely, the front end of the tubular insulating structure 16 is a certain distance behind the front end of the insulating medium pipe 4.
The first insulating tube 14, the second insulating tube 15 and the tubular insulating structure 16 are used for fixing the insulating medium tube 4 and insulating protection, and the insulating outer wall 3, the insulating medium tube 4, the first insulating tube 14, the second insulating tube 15 and the tubular insulating structure 16 are all circular tubular structures.
In order to fix the insulating medium pipe 4 and fill the seal, the insulating medium pipe 4 and the first insulating pipe 14 are sealed and bonded through a first sealant, and the insulating medium pipe 4 and the second insulating pipe 15 are sealed and filled through a second sealant.
As another improvement of the invention, a handle cavity 17 is arranged in the handle 1, and the rear end of the cutter head assembly 2 is inserted into the front end of the handle cavity 17 from the front end of the handle 1.
The power cable 9 is connected at handle 1 rear end, and power cable 9 gets into handle cavity 17 from handle 1 rear end and wears forward handle cavity 17 front end, and first insulator spindle 14 rear end is provided with sealing plug 19, and needle-shaped high voltage electrode 6 wears to be fixed on sealing plug 19 to needle-shaped high voltage electrode 6's front end and rear end are located the front and back both sides of sealing plug 19 respectively, and power cable 9's high voltage wire 12 is connected with needle-shaped high voltage electrode 6 rear end through binding post 20. The ground wire 13 of the power cable 9 passes through the gap between the first insulating tube 14 and the second insulating tube 15 and is connected to the annular ground electrode 7.
The air inlet pipe 10 is connected to the rear end of the handle 1, the air inlet pipe 10 enters the handle cavity 17 from the rear end of the handle 1 and passes forward to the front end of the handle cavity 17, an air cavity 21 is arranged in the first insulating pipe 14, the rear end of the plasma channel 5 of the insulating medium pipe 4 is communicated with the air cavity 21, an air inlet channel 18 is arranged at the front end of the air inlet pipe 10, and the air inlet channel 18 is communicated with the air cavity 21 after passing through the sealing plug 19.
The suction tube 11 is connected to the rear end of the handle 1, the suction tube 11 enters the handle cavity 17 from the rear end of the handle 1 and passes forward through the front end of the handle cavity 17, and the front end of the suction tube 11 is connected to the rear end of the suction channel 6.
The needle-shaped high-voltage electrode 6 and the annular-shaped electrode 7 are made of solid metal, including but not limited to stainless steel, tungsten, alloys thereof, and the like. The insulating medium pipe is made of ceramic or glass. The materials of the first insulating tube, the second insulating tube and the tubular insulating structure are ceramics or plastics, including but not limited to alumina ceramics, zirconia ceramics, polyvinylidene fluoride, PVC tubes, PET and the like. The suction channel and the air inlet channel are made of high polymer materials, including but not limited to PEEK, PI, PVC. The sealing plug 19 is made of soft materials including, but not limited to, medical silica gel, medical polyurethane, medical rubber, etc. The material of the terminal 20 is solid metal, including but not limited to aluminum, copper, and alloys thereof. The first sealant and the second sealant are made of epoxy resin structural adhesive.
Preferably, the distance between the front end of the needle-shaped high-voltage electrode 6 and the rear end of the annular electrode 7 is 0.5-1.5cm, and the distance between the front end of the annular electrode and the front end of the insulating medium pipe is 0.5-1.5cm.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (10)
1. The plasma jet cutter head is characterized by comprising a handle and a cutter head assembly which are sequentially connected from back to front;
the tool bit assembly comprises a tubular insulating outer wall, an insulating medium pipe is arranged in the insulating outer wall, plasma channels penetrating through the front end and the rear end of the insulating medium pipe are arranged in the insulating medium pipe, and the front end of the insulating medium pipe extends out of the front end of the insulating outer wall for a first distance; the needle-shaped high-voltage electrode is arranged in the insulating medium pipe, an annular ground electrode is sleeved on the outer wall of the insulating medium pipe in the insulating outer wall, the annular ground electrode is positioned in front of the needle-shaped high-voltage electrode, and a second distance is reserved between the front end of the needle-shaped high-voltage electrode and the rear end of the annular ground electrode; the outer insulating wall is provided with an attraction channel outside the outer insulating wall;
the handle is provided with a power cable, an air inlet pipe and a suction pipe, a high-voltage wire and a ground wire of the power cable are respectively connected with the needle-shaped high-voltage electrode and the annular ground electrode, the air inlet pipe is connected with a plasma channel of the insulating medium pipe, and the suction pipe is connected with the suction channel.
2. The plasma jet cutter head according to claim 1, wherein the insulating outer wall comprises a first insulating tube and a second insulating tube, the insulating medium tube is positioned inside the first insulating tube, the front end of the insulating medium tube extends out of the front end of the first insulating tube by a third distance, and the annular ground electrode is positioned on the insulating medium tube in front of the first insulating tube; the second insulating tube is coated on the outer side of the first insulating tube, and the front end of the insulating medium tube extends out of the front end of the second insulating tube by a first distance.
3. The plasma jet cutter head according to claim 2, wherein a tubular insulating structure is provided between the insulating medium tube and the second insulating tube in front of the annular ground electrode, and a front end of the tubular insulating structure extends out of a front end of the second insulating tube by a fourth distance, which is smaller than the first distance.
4. The plasma jet cutter head according to claim 3, wherein the insulating medium pipe and the first insulating pipe are sealed and bonded through a first sealant, and the insulating medium pipe and the second insulating pipe are sealed and filled through a second sealant.
5. The plasma jet cutter head of claim 4, wherein a handle cavity is provided in the handle, the rear end of the cutter head assembly being inserted into the handle cavity front end from the handle front end.
6. The plasma jet cutter head according to claim 5, wherein the power cable is connected to the rear end of the handle, the power cable enters the handle cavity from the rear end of the handle and passes forward to the front end of the handle cavity, the rear end of the first insulating tube is provided with a sealing plug, the needle-shaped high-voltage electrode passes through the sealing plug to be fixed, the front end and the rear end of the needle-shaped high-voltage electrode are respectively positioned on the front side and the rear side of the sealing plug, the high-voltage wire of the power cable is connected with the rear end of the needle-shaped high-voltage electrode through a connecting terminal, and the ground wire of the power cable passes through a gap between the first insulating tube and the second insulating tube and is connected with the annular ground electrode.
7. The plasma jet cutter head according to claim 6, wherein the air inlet pipe is connected to the rear end of the handle, the air inlet pipe enters the handle cavity from the rear end of the handle and passes forward to the front end of the handle cavity, an air cavity is arranged in the first insulating pipe, the rear end of the plasma channel of the insulating medium pipe is communicated with the air cavity, an air inlet channel is arranged at the front end of the air inlet pipe, and the air inlet channel is communicated with the air cavity through the sealing plug.
8. The plasma jet cutter head of claim 7, wherein the suction tube is connected to the rear end of the handle, the suction tube enters the handle cavity from the rear end of the handle and passes forward to the front end of the handle cavity, and the front end of the suction tube is connected to the rear end of the suction channel.
9. The plasma jet tool bit according to claim 8, wherein the needle-shaped high-voltage electrode and the annular ground electrode are made of solid metal, the insulating medium tube is made of ceramic or glass, the first insulating tube, the second insulating tube and the tubular insulating structure are made of ceramic or plastic, the suction channel and the air inlet channel are made of high polymer materials, the sealing plug is made of soft materials, the connecting terminal is made of solid metal, and the first sealant and the second sealant are made of epoxy resin structural adhesives.
10. The plasma jet cutter head according to any one of claims 1 to 9, wherein the needle-shaped high-voltage electrode front end is spaced from the annular ground electrode rear end by a second distance of 0.5 cm to 1.5cm, and the annular ground electrode front end is spaced from the insulating medium tube front end by a distance of 0.5 cm to 1.5cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211100171.2A CN117694993A (en) | 2022-09-07 | 2022-09-07 | Plasma jet tool bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211100171.2A CN117694993A (en) | 2022-09-07 | 2022-09-07 | Plasma jet tool bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117694993A true CN117694993A (en) | 2024-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211100171.2A Pending CN117694993A (en) | 2022-09-07 | 2022-09-07 | Plasma jet tool bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117694993A (en) |
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2022
- 2022-09-07 CN CN202211100171.2A patent/CN117694993A/en active Pending
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