CN113262023A - Supplementary laser positioning device that uses of anesthesia puncture in canalis spinalis - Google Patents

Supplementary laser positioning device that uses of anesthesia puncture in canalis spinalis Download PDF

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Publication number
CN113262023A
CN113262023A CN202110541041.1A CN202110541041A CN113262023A CN 113262023 A CN113262023 A CN 113262023A CN 202110541041 A CN202110541041 A CN 202110541041A CN 113262023 A CN113262023 A CN 113262023A
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CN
China
Prior art keywords
rod
protractor
fixedly connected
positioning rod
cotton pad
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Pending
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CN202110541041.1A
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Chinese (zh)
Inventor
陈志明
李海燕
廖佩如
熊志立
黎艳英
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Individual
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Priority to CN202110541041.1A priority Critical patent/CN113262023A/en
Publication of CN113262023A publication Critical patent/CN113262023A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
    • G01S17/06—Systems determining position data of a target
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34—Trocars; Puncturing needles
    • A61B17/3401—Puncturing needles for the peridural or subarachnoid space or the plexus, e.g. for anaesthesia
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34—Trocars; Puncturing needles
    • A61B17/3403—Needle locating or guiding means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
    • A61B34/20—Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B3/00—Measuring instruments characterised by the use of mechanical techniques
    • G01B3/56—Gauges for measuring angles or tapers, e.g. conical calipers
    • G01B3/563—Protractors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34—Trocars; Puncturing needles
    • A61B17/3403—Needle locating or guiding means
    • A61B2017/3405—Needle locating or guiding means using mechanical guide means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
    • A61B34/20—Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
    • A61B2034/2046—Tracking techniques
    • A61B2034/2055—Optical tracking systems

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Physics & Mathematics (AREA)
  • Molecular Biology (AREA)
  • Medical Informatics (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • General Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Electromagnetism (AREA)
  • Pathology (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Anesthesiology (AREA)
  • Robotics (AREA)
  • Laser Surgery Devices (AREA)

Abstract

The invention discloses a laser positioning device for assisting anesthesia puncture in a vertebral canal, which comprises a protractor, wherein the protractor is of a vertically-arranged fan-shaped structure, a second clamping groove for mounting a second positioning rod is formed in the middle of one side of the protractor, a first clamping groove for mounting a connecting plate is formed in one side of the protractor close to the second clamping groove, a first positioning rod is fixedly connected to the middle of one side of the connecting plate, the first positioning rod and the second positioning rod are arranged in a right-angled structure, a mounting plate is fixedly connected to one side of the protractor far away from the second positioning rod, an upright column is arranged under the mounting plate, the upright column is connected with the mounting plate through a push rod, a bottom plate is fixedly connected to the bottom end of the upright column, a knob is connected to the lower part of one end of the upright column, the first positioning rod and the second positioning rod are positioned on the same horizontal line, and the laser positioning device for assisting anesthesia puncture in a vertebral canal is provided, reasonable in design, easy operation easily promotes.

Description

Supplementary laser positioning device that uses of anesthesia puncture in canalis spinalis
Technical Field
The invention belongs to the technical field of medical instruments, and particularly relates to a laser positioning device for assisting spinal anesthesia and puncture.
Background
Anesthesia, numbness paralysis, and drunkenness coma. Therefore, anesthesia means that a patient temporarily loses his or her feeling wholly or locally by medication or other means to perform surgical treatment for the purpose of no pain. Anesthesiology is a science that applies basic theory, clinical knowledge and technology related to anesthesia to eliminate operation pain of patients, ensure safety of patients and create good conditions for operations.
"an anesthetic is injected into the subarachnoid or epidural space of the spinal canal, and the spinal nerve root is blocked to produce an anesthetic effect on the corresponding area innervated by the nerve root, which is collectively called intraspinal anesthesia. At present, the spinal anesthesia is lack of a positioning device during puncture, and the alignment result of the puncture can be influenced, so that the laser positioning device for assisting the spinal anesthesia puncture is needed to be provided to solve the problems.
Disclosure of Invention
The invention aims to provide a laser positioning device for assisting spinal anesthesia puncture, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an anesthesia puncture is supplementary with laser positioning device in canalis spinalis, includes the protractor, the protractor is the vertical fan-shaped structure of placing, the second draw-in groove that is used for installing the second locating lever is offered to protractor one side placed in the middle department, the first draw-in groove that is used for the erection joint board is offered to one side that the protractor is close to the second draw-in groove, the first locating lever of fixedly connected with of department placed in the middle of connecting plate one side, be the right angle structure between first locating lever and the second locating lever and arrange, the one side fixedly connected with mounting panel of second locating lever is kept away from to the protractor, be equipped with the stand under the mounting panel, the stand passes through the push rod and is connected with the mounting panel, stand bottom fixedly connected with bottom plate, stand one end sub-unit connection has the knob.
Preferably, a limiting pad is glued to the bottom end of the bottom plate, the first positioning rod and the second positioning rod are located on the same horizontal line, the second positioning rod is fixedly connected with the protractor through a second bolt, and the connecting plate is fixedly connected with the protractor through a third bolt.
Preferably, one end of the protractor is connected with a first cotton pad, one side of the first positioning rod, which is close to the first cotton pad, is connected with a second cotton pad, and the first cotton pad and the second cotton pad are located on the same horizontal line.
Preferably, one end of the protractor, which is close to the first cotton pad, is fixedly glued with a first magic tape, one side of the first cotton pad, which is close to the first magic tape, is fixedly connected with a second magic tape, and the first magic tape is matched with the second magic tape for use.
Preferably, a third magic tape is fixedly glued on one side of the first positioning rod, which is close to the second cotton pad, and a fourth magic tape matched with the third magic tape is fixedly connected on one side of the second cotton pad, which is close to the first positioning rod.
Preferably, the stand column is internally provided with a partition board which is fixedly connected with the inner wall of the stand column, and the partition board divides the inside of the stand column into an upper installation space and a lower installation space which are relatively independent.
Preferably, the upright post is also internally provided with a threaded rod, a push plate sleeved on the threaded rod, a push rod with the bottom end vertically inserted on the push plate, a first gear with the top end fixedly connected with the bottom end of the threaded rod, a second gear meshed with the first gear and a rotary rod with one end fixedly connected with the second gear.
Preferably, the top end of the threaded rod is rotatably connected with the inner wall of the top end of the upright column, the bottom end of the threaded rod penetrates through the partition plate and is fixedly connected with the first gear, one end, far away from the push plate, of the push rod penetrates through the upright column and is vertically inserted into the mounting plate, and one end, far away from the second gear, of the rotary rod penetrates through the upright column and is fixedly connected with the rotary knob.
Preferably, one end of the second positioning rod, which is far away from the protractor, is connected with the connecting rod through an extension rod, and the second positioning rod is fixedly connected with the extension rod through a first bolt.
The invention has the technical effects and advantages that: this supplementary laser positioning device that uses of anesthesia puncture in spinal canal, through the protractor, the design of first locating lever and second locating lever, can fix a position laser emitter's position, because first locating lever is located same water flat line with the second locating lever, thereby be convenient for fix a position puncture position, through first draw-in groove, the design of second draw-in groove, and then be convenient for first locating lever, the second locating lever is installed and is dismantled, design through the mounting panel, be convenient for be connected protractor and stand, cooperation through push rod and knob is used, be convenient for highly adjust the protractor, make the device can be applicable to not co-altitude laser emitter, the device's suitability has been improved, this supplementary laser positioning device for anesthesia puncture in spinal canal, and reasonable design, and is simple to operate, and easy popularization.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of the invention at A in FIG. 1;
FIG. 3 is a perspective view of the mounting plate of the present invention;
figure 4 is a perspective view of the protractor of the present invention;
figure 5 is a schematic view of the internal structure of the pole of the present invention.
In the figure: 1 stand, 2 push rods, 3 first locating levers, 4 protractors, 5 bottom plates, 6 spacing pads, 7 knobs, 8 second locating levers, 9 first bolts, 10 extension rods, 11 connecting rods, 12 second bolts, 13 mounting plates, 14 first draw-in grooves, 15 second draw-in grooves, 16 first magic subsides, 17 second magic subsides, 18 first cotton pads, 19 second cotton pads, 20 third magic subsides, 21 fourth magic subsides, 22 connecting plates, 23 push pedal, 24 threaded rods, 25 baffles, 26 first gear, 27 second gear, 28 swing levers.
Detailed Description
The present invention is described in detail with reference to the drawings, but the scope of the present invention is not limited to the following embodiments, and all simple equivalent changes and modifications made by the claims and the contents of the specification of the present invention are still within the scope of the present invention.
As shown in fig. 1 to 5, the angle gauge 4 is included, the angle gauge 4 is a vertically-arranged fan-shaped structure, a second clamping groove 15 for mounting a second positioning rod 8 is formed in the middle of one side of the angle gauge 4, one end of the second positioning rod 8, which is far away from the angle gauge 4, is connected with a connecting rod 11 through an extension rod 10, and the second positioning rod 8 is fixedly connected with the extension rod 10 through a first bolt 9; the second positioning rod 8 is movably connected with an extension rod 10, and the first bolt 9 can limit the position of the extension rod 10;
a first clamping groove 14 for mounting a connecting plate 22 is formed in one side, close to a second clamping groove 15, of the protractor 4, a first positioning rod 3 is fixedly connected to the middle of one side of the connecting plate 22, the first positioning rod 3 and the second positioning rod 8 are arranged in a right-angle structure, a mounting plate 13 is fixedly connected to one side, far away from the second positioning rod 8, of the protractor 4, an upright post 1 is arranged under the mounting plate 13, the upright post 1 is connected with the mounting plate 13 through a push rod 2, a bottom plate 5 is fixedly connected to the bottom end of the upright post 1, and a knob 7 is connected to the lower portion of one end of the upright post 1; the bottom end of the bottom plate 5 is glued with a limiting pad 6, the first positioning rod 3 and the second positioning rod 8 are located on the same horizontal line, the second positioning rod 8 is fixedly connected with the protractor 4 through a second bolt 12, the connecting plate 22 is fixedly connected with the protractor 4 through a third bolt, and the first positioning rod 3 and the second positioning rod 8 can be conveniently mounted and dismounted through the design of the first clamping groove 14 and the second clamping groove 15.
One end of the protractor 4 is connected with a first cotton pad 18, one side of the first positioning rod 3, which is close to the first cotton pad 18, is connected with a second cotton pad 19, and the first cotton pad 18 and the second cotton pad 19 are located on the same horizontal line; a first magic tape 16 is fixedly glued at one end of the protractor 4 close to a first cotton pad 18, a second magic tape 17 is fixedly connected at one side of the first cotton pad 18 close to the first magic tape 16, and the first magic tape 16 and the second magic tape 17 are matched for use; first locating rod 3 is close to the fixed glue of one side of the cotton pad 19 of second and has third magic subsides 20, the cotton pad 19 of second be close to one side fixedly connected with of first locating rod 3 with the fourth magic subsides 21 of third magic subsides 20 looks adaptations, through the design of first magic subsides 16 and second magic subsides 17, the installation of the cotton pad 18 of first of being convenient for, through the design of third magic subsides 20 and fourth magic subsides 21, the cotton pad 19's of second of being convenient for installation and dismantlement.
A partition plate 25 is arranged inside the upright post 1, the partition plate 25 is fixedly connected with the inner wall of the upright post 1, and the partition plate 25 divides the inside of the upright post 1 into an upper installation space and a lower installation space which are relatively independent; the upright post 1 is also internally provided with a threaded rod 24, a push plate 23 sleeved on the threaded rod 24, a push rod 2 with the bottom end vertically inserted on the push plate 23, a first gear 26 with the top end fixedly connected with the bottom end of the threaded rod 24, a second gear 27 meshed with the first gear 26 and a rotary rod 28 with one end fixedly connected with the second gear 27; the 24 tops of threaded rod are connected with 1 top inner wall of stand rotation, baffle 25 and first gear 26 fixed connection are passed to 24 bottoms of threaded rod, the one end that push pedal 23 was kept away from to push rod 2 is passed stand 1 and is inserted perpendicularly on mounting panel 13, the one end that second gear 27 was kept away from to swing arm 28 is passed stand 1 and knob 7 fixed connection, twist and turn knob 7 and can drive swing arm 28 and rotate, and swing arm 28 can drive second gear 27 and rotate, and second gear 27 drives first gear 6 and rotates, and first gear 6 drives threaded rod 4 and rotates, through the screw-thread fit of threaded rod 4 with push pedal 23, makes push pedal 23 can promote mounting panel 13 through push rod 2 and do the upward movement, and then can drive protractor 4 and do the upward movement.
The working principle is as follows: when the laser positioning device for assisting in anesthesia puncture in the vertebral canal is used, the device is firstly placed between a sickbed and a laser emitter, the height of the protractor 4 is adjusted according to the height of the sickbed and the position of a patient, the turning knob 7 can drive the rotary rod 28 to rotate, the rotary rod 28 can drive the second gear 27 to rotate, the second gear 27 drives the first gear 6 to rotate, the first gear 6 drives the threaded rod 4 to rotate, the push plate 23 can push the mounting plate 13 to move upwards through the threaded matching of the threaded rod 4 and the push plate 23, the protractor 4 can be driven to move upwards, the protractor 4 is adjusted to be in a proper height, then the protractor 4 is moved integrally towards the direction of the patient until the first cotton pad 18 on the protractor 4 is contacted with the skin of the patient, and the second cotton pad 19 is also contacted with the skin of the patient, take connecting rod 11 out towards the direction of keeping away from second locating lever 8, then pass first bolt 9 second locating lever 8 and be connected with extension rod 10, after adjusting the position, with laser emitter's altitude mixture control and second locating lever 8 can, this spinal intraductal anesthesia puncture is supplementary with laser positioning device, reasonable in design, easy operation easily promotes.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (9)

1. The utility model provides an anesthesia puncture is supplementary with laser positioner in canalis spinalis, includes protractor (4), its characterized in that: the protractor (4) is of a vertically-arranged fan-shaped structure, a second clamping groove (15) used for mounting a second positioning rod (8) is formed in the middle of one side of the protractor (4), one side of the protractor (4) close to the second clamping groove (15) is provided with a first clamping groove (14) for mounting a connecting plate (22), a first locating rod (3) is fixedly connected at the middle part of one side of the connecting plate (22), the first positioning rod (3) and the second positioning rod (8) are arranged in a right-angle structure, one side of the protractor (4) far away from the second positioning rod (8) is fixedly connected with a mounting plate (13), a column (1) is arranged under the mounting plate (13), the column (1) is connected with the mounting plate (13) through a push rod (2), the bottom end of the upright post (1) is fixedly connected with a bottom plate (5), and the lower part of one end of the upright post (1) is connected with a knob (7).
2. The laser positioning device for assisting puncture for intraspinal anesthesia according to claim 1, wherein: the bottom end of the bottom plate (5) is fixedly glued with a limiting pad (6), the first positioning rod (3) and the second positioning rod (8) are located on the same horizontal line, the second positioning rod (8) is fixedly connected with the protractor (4) through a second bolt (12), and the connecting plate (22) is fixedly connected with the protractor (4) through a third bolt.
3. The laser positioning device for assisting puncture for intraspinal anesthesia according to claim 1, wherein: one end of the protractor (4) is connected with a first cotton pad (18), one side, close to the first cotton pad (18), of the first positioning rod (3) is connected with a second cotton pad (19), and the first cotton pad (18) and the second cotton pad (19) are located on the same horizontal line.
4. The laser positioning device for assisting puncture for intraspinal anesthesia according to claim 3, wherein: the angle gauge is characterized in that a first magic tape (16) is fixedly glued at one end, close to the first cotton pad (18), of the angle gauge (4), a second magic tape (17) is fixedly connected to one side, close to the first magic tape (16), of the first cotton pad (18), and the first magic tape (16) and the second magic tape (17) are matched for use.
5. The laser positioning device for assisting puncture for intraspinal anesthesia according to claim 3, wherein: a third magic tape (20) is fixedly glued on one side, close to the second cotton pad (19), of the first positioning rod (3), and a fourth magic tape (21) matched with the third magic tape (20) is fixedly connected on one side, close to the first positioning rod (3), of the second cotton pad (19).
6. The laser positioning device for assisting puncture for intraspinal anesthesia according to claim 1, wherein: the novel vertical column is characterized in that a partition plate (25) is arranged inside the vertical column (1), the partition plate (25) is fixedly connected with the inner wall of the vertical column (1), and the partition plate (25) divides the interior of the vertical column (1) into an upper installation space and a lower installation space which are relatively independent.
7. The laser positioning device for assisting puncture for intraspinal anesthesia according to claim 1, wherein: the upright post (1) is also internally provided with a threaded rod (24), a push plate (23) sleeved on the threaded rod (24), a push rod (2) with the bottom end vertically inserted on the push plate (23), a first gear (26) with the top end fixedly connected with the bottom end of the threaded rod (24), a second gear (27) meshed with the first gear (26) and a rotary rod (28) with one end fixedly connected with the second gear (27).
8. The laser positioning device for assisting puncture for intraspinal anesthesia according to claim 1, wherein: threaded rod (24) top is rotated with stand (1) top inner wall and is connected, baffle (25) and first gear (26) fixed connection are passed to threaded rod (24) bottom, the one end that push pedal (23) were kept away from in push rod (2) is passed stand (1) and is inserted perpendicularly on mounting panel (13), stand (1) and knob (7) fixed connection are passed to the one end that second gear (27) were kept away from in swing arm (28).
9. The laser positioning device for assisting puncture for intraspinal anesthesia according to claim 1, wherein: one end, far away from the protractor (4), of the second positioning rod (8) is connected with a connecting rod (11) through an extension rod (10), and the second positioning rod (8) is fixedly connected with the extension rod (10) through a first bolt (9).
CN202110541041.1A 2021-05-18 2021-05-18 Supplementary laser positioning device that uses of anesthesia puncture in canalis spinalis Pending CN113262023A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110541041.1A CN113262023A (en) 2021-05-18 2021-05-18 Supplementary laser positioning device that uses of anesthesia puncture in canalis spinalis

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110541041.1A CN113262023A (en) 2021-05-18 2021-05-18 Supplementary laser positioning device that uses of anesthesia puncture in canalis spinalis

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CN113262023A true CN113262023A (en) 2021-08-17

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101120881A (en) * 2006-08-07 2008-02-13 上海导向医疗系统有限公司 CT positioning percutaneously inserting puncture instrument
CN204683723U (en) * 2015-05-11 2015-10-07 王炳武 Intervertebral foramina puncture navigation arrangement
CN205181393U (en) * 2015-11-03 2016-04-27 高云 Biopsy puncture guiding laser
CN208212087U (en) * 2017-06-22 2018-12-11 冯晓君 A kind of percutaneous lumbar intervertebral disc puncture locator
CN208435733U (en) * 2017-08-01 2019-01-29 中国人民解放军南京军区南京总医院 A kind of lung puncture surgical guide device
CN209944465U (en) * 2018-12-24 2020-01-14 苏州暖开智能地暖科技有限公司 Floor heating installation structure
KR102127354B1 (en) * 2019-04-22 2020-06-29 (주)피플앤에스 Adult am diaper changing facility
CN211796756U (en) * 2019-12-16 2020-10-30 内江市第二人民医院 CT-guided puncture combined orienting device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101120881A (en) * 2006-08-07 2008-02-13 上海导向医疗系统有限公司 CT positioning percutaneously inserting puncture instrument
CN204683723U (en) * 2015-05-11 2015-10-07 王炳武 Intervertebral foramina puncture navigation arrangement
CN205181393U (en) * 2015-11-03 2016-04-27 高云 Biopsy puncture guiding laser
CN208212087U (en) * 2017-06-22 2018-12-11 冯晓君 A kind of percutaneous lumbar intervertebral disc puncture locator
CN208435733U (en) * 2017-08-01 2019-01-29 中国人民解放军南京军区南京总医院 A kind of lung puncture surgical guide device
CN209944465U (en) * 2018-12-24 2020-01-14 苏州暖开智能地暖科技有限公司 Floor heating installation structure
KR102127354B1 (en) * 2019-04-22 2020-06-29 (주)피플앤에스 Adult am diaper changing facility
CN211796756U (en) * 2019-12-16 2020-10-30 内江市第二人民医院 CT-guided puncture combined orienting device

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Application publication date: 20210817