CN114469319B - Drug flushing type nano amputation saw - Google Patents

Drug flushing type nano amputation saw Download PDF

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Publication number
CN114469319B
CN114469319B CN202111579439.0A CN202111579439A CN114469319B CN 114469319 B CN114469319 B CN 114469319B CN 202111579439 A CN202111579439 A CN 202111579439A CN 114469319 B CN114469319 B CN 114469319B
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Prior art keywords
amputation
pulse
saw body
saw
metal sheet
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CN202111579439.0A
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Chinese (zh)
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CN114469319A (en
Inventor
刘鸣宇
刘晓颖
栾欣
武佳文
郑希宝
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Dalian Medical University
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Dalian Medical University
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12Surgical 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
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14Probes or electrodes therefor
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00053Mechanical features of the instrument of device
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00315Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for treatment of particular body parts
    • A61B2018/00565Bone
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2018/00571Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
    • A61B2018/00577Ablation
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/04Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
    • A61B18/12Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
    • A61B18/14Probes or electrodes therefor
    • A61B2018/1405Electrodes having a specific shape
    • A61B2018/1425Needle
    • A61B2018/143Needle multiple needles
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2218/00Details of surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B2218/001Details 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
    • A61B2218/002Irrigation

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  • Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Otolaryngology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Plasma & Fusion (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

The invention discloses a drug flushing type nanometer amputation saw, which comprises an amputation saw body, wherein a flushing mechanism and a pulse generating mechanism are arranged on the amputation saw body; the flushing mechanism includes: a left chuck, a right chuck, an upper chuck pipeline, a medicine injection port and a medicine injection structure; the left clamp head is detachably arranged on the left side of the top end of the amputation saw body, the right clamp head is detachably arranged on the right side of the top end of the amputation saw body, and the upper clamp pipeline is arranged on the top ends of the left clamp head and the right clamp head.

Description

Drug flushing type nano amputation saw
Technical Field
The invention relates to the technical field of amputation saws, in particular to a drug flushing type nanometer amputation saw.
Background
Clinically, in order to prevent cancer cells in a patient from spreading, most of the patient adopts an amputation saw to cut off a lesion tissue area, amputation is an important treatment means, the amputation saw is a medical instrument commonly used in orthopedic surgery, the existing amputation saw is not smooth in working and does not have a function of medicine flushing, in the cutting process, disinfectant or hemostatic is required to be sprayed to the cutting part manually, the patient is inconvenient to use, meanwhile, the patient does not have a pulse function, tumor cells cannot be broken in the cutting process, the practicality is greatly reduced, and the patient has been studied in depth against the problems.
Disclosure of Invention
The invention aims to solve the problems, and designs the drug flushing type nanometer amputation saw, which solves the problems that the existing amputation saw is unsmooth in working and does not have the function of drug flushing, and in the excision process, disinfectant or hemostatic is required to be sprayed to excision parts manually, so that the drug flushing type nanometer amputation saw is inconvenient to use, does not have a pulse function, cannot break tumor cells in the excision process, and greatly reduces the practicality.
The technical scheme of the invention for achieving the purpose is as follows: the drug flushing type nanometer amputation saw comprises an amputation saw body, wherein a flushing mechanism and a pulse generating mechanism are arranged on the amputation saw body;
the flushing mechanism includes: a left chuck, a right chuck, an upper chuck pipeline, a medicine injection port and a medicine injection structure;
the left chuck is installed on the left side on amputation saw body top, the right chuck is installed on the right side on amputation saw body top, go up the top that presss from both sides pipeline installation on left chuck and right chuck, the right side on last clamp pipeline top is installed to the injection mouth, the medicament injection structure is installed on the injection mouth.
Preferably, an anti-slip layer is arranged on the amputation saw body.
Preferably, the medicine injection structure includes: a drug delivery tube and a micro-electronic pump;
one end of the medicine conveying pipe is connected to the medicine injection port, and the medicine outlet of the micro electronic pump is connected to the other end of the medicine conveying pipe.
Preferably, two sides of the upper clamping pipeline are provided with a plurality of micro drug outlets.
Preferably, the left chuck and the right chuck are provided with anti-skid glue lines.
Preferably, the pulse generating mechanism includes: a metal sheet, a joint, a pulse nanowire, a pulse therapeutic apparatus and a pulse emitting structure;
the utility model discloses a limb amputation saw, including the metal sheet, the metal sheet is installed on amputation saw body, the left end of joint is installed at the right-hand member of metal sheet, the right-hand member at the joint is connected to the one end of pulse nanowire, the other end at pulse nanowire is connected to the pulse therapeutic instrument, the pulse send out the structure and install on the metal sheet.
Preferably, the pulse therapeutic apparatus is provided with an induction lamp.
Preferably, the pulse emitting structure includes: the device comprises a first nanotube, a second nanotube, a third nanotube and a plurality of nanoneedles;
the first nanotube is installed on the amputation saw body and the top is connected to the metal sheet, the second nanotube is installed on the amputation saw body and the top is connected to the metal sheet, the third nanotube is installed on the amputation saw body and the top is connected to the metal sheet, and a plurality of nanoneedles are respectively installed at the bottoms of the first nanotube, the second nanotube and the third nanotube.
Preferably, the left chuck is detachable.
Preferably, the right chuck is detachable.
The drug flushing type nanometer amputation saw manufactured by the technical scheme of the invention has the advantages that under the mutual cooperation of the micro-electronic pump, the drug delivery pipe and the upper clamping pipeline, the amputation saw body is used for flushing or stopping bleeding at the cutting part in the cutting process, the pulse therapeutic instrument is added to prevent tumors from entering bone marrow and open blood, various chemotherapeutics can be adopted at the same time, the convenience is improved, the effect of pulse nanometer cutting is realized through the nanoneedle, meanwhile, the high-frequency pulse acceleration can enable the amputation saw body to be smoother in use, cancer cells are killed, the tumor cells are broken down under high pressure, so that apoptosis is caused, three-point ablation electrodes are arranged in the amputation saw body, microsecond high-pressure pulses can be released, residual tumor cell membranes are broken down under high pressure, and the tumor cells are broken down under high pressure.
Drawings
Fig. 1 is a schematic diagram of a front view structure of a drug-washing type nano amputation saw according to the present invention.
Fig. 2 is a schematic diagram of the structure of the upper clamp pipe of the drug flushing type nano amputation saw.
Fig. 3 is a schematic diagram of the micro-outlet structure of the drug flushing type nano amputation saw.
Fig. 4 is a schematic diagram of the left chuck structure of the drug-washing type nano amputation saw.
Fig. 5 is a schematic diagram of a joint structure of the drug-eluting nano amputation saw according to the present invention.
In the figure: 1. the amputation saw body, 2, left chuck, 3, right chuck, 4, upper clamp pipeline, 5, medicine injection mouth, 6, anti-slip layer, 7, medicament conveying pipe, 8, micro electronic pump, 9, micro medicine outlet, 10, anti-slip glue line, 11, sheetmetal, 12, joint, 13, pulse nanowire, 14, pulse therapeutic instrument, 15, induction lamp, 16, first nanotube, 17, second nanotube, 18, third nanotube, 19, nanoneedle.
Detailed Description
The invention is specifically described below with reference to the accompanying drawings, as shown in fig. 1-5, the drug flushing type nanometer amputation saw comprises an amputation saw body 1, wherein a flushing mechanism and a pulse generating mechanism are arranged on the amputation saw body 1;
the flushing mechanism comprises: a left clamping head 2, a right clamping head 3, an upper clamping pipeline 4, a medicine injection port 5 and a medicine injection structure;
the left chuck 2 is installed in the left side on amputation saw body 1 top, and right chuck 3 is installed on the right side on amputation saw body 1 top, and go up clamp pipe 4 and install on the top of left chuck 2 and right chuck 3, and the right side on last clamp pipe 4 top is installed to the injection mouth 5, and the medicament injection structure is installed on injection mouth 5, installs anti-skidding layer 6 on amputation saw body 1, is provided with anti-skidding glue line 10 on left chuck 2 and the right chuck 3.
In the specific implementation process, it should be noted that, firstly, when the amputation saw body 1 is used, the anti-slip layer 6 is used for increasing the friction between the hand and the amputation saw body 1 to prevent sliding, then the upper clamping pipe 4 is placed on the amputation saw body 1 through the left clamping head 2 and the right clamping head 3, then the medicament is injected into the upper clamping pipe 4 through the medicament injection structure through the medicament injection port 5, the anti-slip glue lines 10 on the left clamping head 2 and the right clamping head 3 are used for increasing stability, the upper clamping pipe 4 is disposable, and the upper clamping pipe 4 can be disassembled through the left clamping head 2 and the right clamping head 3.
Preferably, further, the medicine injection structure includes: a medicine delivery tube 7 and a micro-electronic pump 8;
one end of a medicament delivery pipe 7 is connected to the medicament injection port 5, a medicament outlet of a micro electronic pump 8 is connected to the other end of the medicament delivery pipe 7, and a plurality of micro medicament outlets 9 are arranged on two sides of the upper clamping pipeline 4.
In a specific implementation process, the medicine is injected into the micro-electronic pump 8, the medicine is injected into the medicine conveying pipe 7 under the action of the micro-electronic pump 8, the medicine is discharged from the micro-medicine outlet 9 through the upper clamping pipeline 4, the medicine is infiltrated on the amputation saw body 1, and further the functions of sterilization and disinfection are achieved, the micro-electronic pump 8 can also adopt a mechanical pump, local anesthetic, flushing fluid or hemostatic can be placed in the micro-electronic pump 8, the medicine flushing can adopt a chemotherapeutic medicine, the hemostatic can also adopt the hemostatic, the local anesthetic and antibiotics or disinfectant are used for flushing, the chemotherapeutic medicine further damages tumor cells, the tumor cells are prevented from entering bone marrow and open blood, the hemostatic can prevent excessive bleeding of non-tumor patients, the local anesthetic mainly relieves pain to tissues, and the antibiotics and disinfectant prevent partial wound infection, especially in an exposed environment.
Preferably, further, the pulse generating mechanism includes: a metal sheet 11, a connector 12, a pulse nanowire 13, a pulse therapeutic apparatus 14, and a pulse emitting structure;
the metal sheet 11 is installed on amputation saw body 1, and the left end of joint 12 is installed at the right-hand member of metal sheet 11, and the right-hand member at joint 12 is connected to the one end of pulse nanowire 13, and pulse therapeutic instrument 14 is connected at the other end of pulse nanowire 13, and pulse send out the structure and install on metal sheet 11, install induction lamp 15 on the pulse therapeutic instrument 14.
In the specific implementation process, the pulse therapeutic apparatus 14 is connected to the connector 12 through the pulse nano-wire 13, and is input to the metal sheet 11 through the connector 12, and the pulse generating structure is arranged on the metal sheet 11 to transmit the pulse signal, so that the sensing lamp 15 is used for detecting the human body.
Preferably, further, the pulse emitting structure includes: a first nanotube 16, a second nanotube 17, a third nanotube 18, and a number of nanoneedles 19;
the first nanotube 16 is installed on the amputation saw body 1, the top end of the first nanotube is connected to the metal sheet 11, the second nanotube 17 is installed on the amputation saw body 1, the top end of the second nanotube is connected to the metal sheet 11, the third nanotube 18 is installed on the amputation saw body 1, the top end of the third nanotube is connected to the metal sheet 11, the plurality of nanoneedles 19 are respectively installed at the bottom ends of the first nanotube 16, the second nanotube 17 and the third nanotube 18, the pulse rising time is less than 800ns, and the pulse width is 90/100us.
In a specific implementation process, it is to be noted that, since the metal sheet 11 is connected with the first nanotube 16, the second nanotube 17 and the third nanotube 18, then the effect of pulse nanocutting is achieved through the nanoneedle 19, meanwhile, the high-frequency pulse acceleration can enable the amputation saw body 1 to be smoother in use, cancer cells are killed, the tumor is broken down under high voltage, so that apoptosis is caused, three ablation electrodes are arranged in the amputation saw body 1, microsecond high-voltage pulses can be released, the residual tumor cells are broken down, the tumor cell membranes are broken down under high voltage, so that the tumor cells are apoptotic, tiny fragments are formed, immune cells are phagocytized, normal cell number is increased to squeeze a lesion tissue region, when the amputation saw is used, the high-voltage pulse output point is 3 points, the output voltage is 1000-3000V, the direct current is adjustable, the pulse width is 90/100us, the pulse rise time is less than 800ns, the pulse number in a group is 3, the electrode discharge mode is two monopoles, the discharge current is beyond a set value (default 45A), and safety protection is performed.
The above technical solution only represents the preferred technical solution of the present invention, and some changes that may be made by those skilled in the art to some parts of the technical solution represent the principles of the present invention, and the technical solution falls within the scope of the present invention.

Claims (3)

1. The drug flushing type nanometer amputation saw comprises an amputation saw body (1) and is characterized in that a flushing mechanism and a pulse generating mechanism are arranged on the amputation saw body (1);
the flushing mechanism includes: a left clamping head (2), a right clamping head (3), an upper clamping pipeline (4), a medicine injection port (5) and a medicine injection structure;
the left clamp head (2) is arranged on the left side of the top end of the amputation saw body (1), the right clamp head (3) is arranged on the right side of the top end of the amputation saw body (1), the upper clamp pipeline (4) is arranged on the top ends of the left clamp head (2) and the right clamp head (3), the medicine injection port (5) is arranged on the right side of the top end of the upper clamp pipeline (4), and the medicine injection structure is arranged on the medicine injection port (5);
an anti-slip layer (6) is arranged on the amputation saw body (1);
the medicine injection structure includes: a drug delivery tube (7) and a micro-electronic pump (8);
one end of the medicament delivery pipe (7) is connected to the medicament injection port (5), and the medicament outlet of the micro electronic pump (8) is connected to the other end of the medicament delivery pipe (7);
a plurality of micro drug outlets (9) are arranged on two sides of the upper clamping pipeline (4);
the left clamping head (2) and the right clamping head (3) are provided with anti-skid rubber lines (10);
the pulse generating mechanism includes: a metal sheet (11), a joint (12), a pulse nano wire (13), a pulse therapeutic instrument (14) and a pulse emitting structure;
the device comprises a metal sheet (11), a connector (12), a pulse nanowire (13), a pulse therapeutic instrument (14) and a pulse emitting structure, wherein the metal sheet (11) is arranged on an amputation saw body (1), the left end of the connector (12) is arranged at the right end of the metal sheet (11), one end of the pulse nanowire (13) is connected to the right end of the connector (12), the pulse therapeutic instrument (14) is connected to the other end of the pulse nanowire (13), and the pulse emitting structure is arranged on the metal sheet (11);
an induction lamp (15) is arranged on the pulse therapeutic instrument (14);
the pulse emitting structure includes: a first nanotube (16), a second nanotube (17), a third nanotube (18) and a plurality of nanoneedles (19);
the first nanotubes (16) are arranged on the amputation saw body (1) and the top ends of the first nanotubes are connected with the metal sheet (11), the second nanotubes (17) are arranged on the amputation saw body (1) and the top ends of the second nanotubes are connected with the metal sheet (11), the third nanotubes (18) are arranged on the amputation saw body (1) and the top ends of the third nanotubes are connected with the metal sheet (11), and the plurality of nanoneedles (19) are respectively arranged at the bottom ends of the first nanotubes (16), the second nanotubes (17) and the third nanotubes (18);
the metal sheet (11) is connected with a first nanotube (16), a second nanotube (17) and a third nanotube (18), then pulse nanometer cutting is realized through a nanometer needle (19), three-point ablation electrodes are arranged in the amputation saw body (1), microsecond high-voltage pulses can be released, the output point of the high-voltage pulses is 3 points, the output voltage is 1000-3000V, the direct current is adjustable, the pulse width is 90/100us, the pulse rising time is less than 800ns, the number of pulses in a group is 3, the electrode discharge mode is two monopoles and one bipole, the discharge current exceeds a set value to terminate the discharge, and safety protection is carried out.
2. Drug-eluting nano amputation saw according to claim 1, characterized in that the left collet (2) is detachable.
3. Drug-eluting nano amputation saw according to claim 1, characterized in that the right grip (3) is detachable.
CN202111579439.0A 2021-12-22 2021-12-22 Drug flushing type nano amputation saw Active CN114469319B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111579439.0A CN114469319B (en) 2021-12-22 2021-12-22 Drug flushing type nano amputation saw

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Application Number Priority Date Filing Date Title
CN202111579439.0A CN114469319B (en) 2021-12-22 2021-12-22 Drug flushing type nano amputation saw

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CN114469319B true CN114469319B (en) 2024-04-05

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Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001002054A2 (en) * 1999-07-06 2001-01-11 Neurostream Technologies, Inc. Electrical stimulation system for treating phantom limb pain
RU2007124700A (en) * 2007-06-29 2009-01-10 Государственное образовательное учреждение высшего профессионального образовани "Военно-медицинский институт Федеральной службы безопасности Российской Федерации (г. Нижний Новгород) (ВМИ ФСБ России) (RU) LIMB AMPUTATION DEVICE
CN104688393A (en) * 2015-02-12 2015-06-10 浙江理工大学 Artificial lower leg with electrical pulse device and laser device
CN104958828A (en) * 2015-06-16 2015-10-07 王才丰 Gynecology administration device
CN205181957U (en) * 2015-11-25 2016-04-27 张岳农 Electronic control binary channels injection endotracheal tube
CN206045127U (en) * 2016-07-13 2017-03-29 张岳农 A kind of dosing of pulsed dual pathways and Endotracheal tube
CN107233125A (en) * 2016-03-28 2017-10-10 文洪明 Neoplastic lesion allosome acupuncture in human body, which is twisted, cuts intelligent nano probe unit
CN108095820A (en) * 2018-02-07 2018-06-01 上海健康医学院 A kind of nano-knife tumour ablation control device and its control method
CN207734217U (en) * 2017-05-03 2018-08-17 廖建春 A kind of ultrathin nanometer knife
BR112012027708A2 (en) * 2010-04-29 2019-09-10 Dfine Inc medical device for treating stiff tissue and osteotome medical device for locking a vertebral body
CN111789672A (en) * 2019-04-09 2020-10-20 亘冠智能技术(杭州)有限公司 Hemostasis scalpel of supplementary accurate cutting of target optical imaging and treatment
CN111887977A (en) * 2020-08-06 2020-11-06 淄博市中心医院 Adjustable radiofrequency ablation needle special for thyroid and mammary glands
WO2020232849A1 (en) * 2019-05-17 2020-11-26 杭州睿笛生物科技有限公司 Electric pulse ablation device capable of synergistic administration
CN214860486U (en) * 2021-03-24 2021-11-26 河南省儿童医院郑州儿童医院 Children digestive patient esophagus device of dosing

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001002054A2 (en) * 1999-07-06 2001-01-11 Neurostream Technologies, Inc. Electrical stimulation system for treating phantom limb pain
RU2007124700A (en) * 2007-06-29 2009-01-10 Государственное образовательное учреждение высшего профессионального образовани "Военно-медицинский институт Федеральной службы безопасности Российской Федерации (г. Нижний Новгород) (ВМИ ФСБ России) (RU) LIMB AMPUTATION DEVICE
BR112012027708A2 (en) * 2010-04-29 2019-09-10 Dfine Inc medical device for treating stiff tissue and osteotome medical device for locking a vertebral body
CN104688393A (en) * 2015-02-12 2015-06-10 浙江理工大学 Artificial lower leg with electrical pulse device and laser device
CN104958828A (en) * 2015-06-16 2015-10-07 王才丰 Gynecology administration device
CN205181957U (en) * 2015-11-25 2016-04-27 张岳农 Electronic control binary channels injection endotracheal tube
CN107233125A (en) * 2016-03-28 2017-10-10 文洪明 Neoplastic lesion allosome acupuncture in human body, which is twisted, cuts intelligent nano probe unit
CN206045127U (en) * 2016-07-13 2017-03-29 张岳农 A kind of dosing of pulsed dual pathways and Endotracheal tube
CN207734217U (en) * 2017-05-03 2018-08-17 廖建春 A kind of ultrathin nanometer knife
CN108095820A (en) * 2018-02-07 2018-06-01 上海健康医学院 A kind of nano-knife tumour ablation control device and its control method
CN111789672A (en) * 2019-04-09 2020-10-20 亘冠智能技术(杭州)有限公司 Hemostasis scalpel of supplementary accurate cutting of target optical imaging and treatment
WO2020232849A1 (en) * 2019-05-17 2020-11-26 杭州睿笛生物科技有限公司 Electric pulse ablation device capable of synergistic administration
CN111887977A (en) * 2020-08-06 2020-11-06 淄博市中心医院 Adjustable radiofrequency ablation needle special for thyroid and mammary glands
CN214860486U (en) * 2021-03-24 2021-11-26 河南省儿童医院郑州儿童医院 Children digestive patient esophagus device of dosing

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