CN110288890A - Intestinal stent implantation apparatus for demonstrating - Google Patents
Intestinal stent implantation apparatus for demonstrating Download PDFInfo
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- CN110288890A CN110288890A CN201910546615.7A CN201910546615A CN110288890A CN 110288890 A CN110288890 A CN 110288890A CN 201910546615 A CN201910546615 A CN 201910546615A CN 110288890 A CN110288890 A CN 110288890A
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- model
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- intestinal stent
- alimentary canal
- opening
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- 230000000968 intestinal effect Effects 0.000 title claims abstract description 48
- 238000002513 implantation Methods 0.000 title claims abstract description 31
- 238000004088 simulation Methods 0.000 claims abstract description 40
- 210000000436 anus Anatomy 0.000 claims abstract description 16
- 230000002496 gastric effect Effects 0.000 claims abstract description 12
- 208000003243 intestinal obstruction Diseases 0.000 claims abstract description 11
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 11
- 230000008685 targeting Effects 0.000 claims description 8
- 210000003238 esophagus Anatomy 0.000 claims description 7
- 230000001681 protective effect Effects 0.000 claims description 7
- 210000002784 stomach Anatomy 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 230000005611 electricity Effects 0.000 claims 1
- 201000010099 disease Diseases 0.000 abstract description 4
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 abstract description 4
- 230000000903 blocking effect Effects 0.000 abstract 1
- 206010061876 Obstruction Diseases 0.000 description 11
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001225 therapeutic effect Effects 0.000 description 2
- 208000031481 Pathologic Constriction Diseases 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000000936 intestine Anatomy 0.000 description 1
- 230000003211 malignant effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 201000001275 rectum cancer Diseases 0.000 description 1
- 230000036262 stenosis Effects 0.000 description 1
- 208000037804 stenosis Diseases 0.000 description 1
- 238000012549 training Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/28—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for medicine
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B9/00—Simulators for teaching or training purposes
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- Medical Informatics (AREA)
- Chemical & Material Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Algebra (AREA)
- Computational Mathematics (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Mathematical Physics (AREA)
- Pure & Applied Mathematics (AREA)
- Instructional Devices (AREA)
- Prostheses (AREA)
Abstract
The invention discloses a kind of intestinal stent implantation apparatus for demonstrating, its key points of the technical solution are that including bracket and transparent artificial human body model, human simulation model is arranged on bracket, human simulation model is built-in with alimentary canal model, alimentary canal model is transparent flexible, one end of alimentary canal model is connected oral area opening, and the other end of alimentary canal model is connected anus opening, and alimentary canal model is equipped with the simulation for simulating bowel obstruction and blocks device.The utility model has the advantages that blocking the simulation disease that device makes gastrointestinal model simulate bowel obstruction by simulation, enter alimentary canal model using device for posting control intestinal stent, reach scheduled position, the steps necessary for needing to carry out when demonstration operation, and allow patient and its family members to understand intestinal stent implantation by explanation.It can get information about how intestinal stent is placed to enteron aisle position through the invention, can allow patient and its family members that can be more readily understood that the operation.
Description
Technical field
The present invention relates to a kind of medical apparatus for demonstrating, more specifically, it relates to a kind of intestinal stent implantation demonstration dress
It sets.
Background technique
In recent years, gradually increased using the treatment that various metallic supports implement intestinal stent implantation both at home and abroad, i.e., in intestines
The narrow position in road places a network and struts enteron aisle, so that stenosis or occlusion position is restored unobstructed again, can be used as knot
The permanently or temporarily property of carcinoma of the rectum malignant obstruction is treated, and is created conditions to choose date for operation.
Most of patients for needing to implement intestinal stent implantation and its family members are the people for not received formal medical training,
So for intestinal stent implantation and not knowing about, this is very common and very normal thing, and existing explanation mode
It is very not intuitive and abundant, need a kind of intestinal stent implantation apparatus for demonstrating that patient and its family members can be allowed to the treatment method energy
Enough there are enough understandings.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide a kind of intestinal stent implantation demonstration dress
It sets, which can intuitively demonstrate how intestinal stent is placed in enteron aisle.
To achieve the above object, the present invention provides the following technical scheme that a kind of intestinal stent implantation apparatus for demonstrating, packet
Bracket and transparent artificial human body model are included, human simulation model is arranged on bracket, and human simulation model is built-in with alimentary canal model,
Alimentary canal model be it is transparent flexible, artificial human body model is equipped with the oral area opening and anus opening be inserted into for intestinal stent,
One end of alimentary canal model is connected oral area opening, and the other end of alimentary canal model is connected anus opening, bracket setting
There is the device for posting of control intestinal stent merging alimentary canal model, alimentary canal model is equipped with the simulation for simulating bowel obstruction and obstructs
Hinder device.
The present invention is further arranged to: device for posting includes shell, conduit, around spool and actuator, and shell is detachably connected
On bracket, actuator is fixedly connected inside the shell, is connected to drive on the actuator that spool rotates around one end of spool, is led
For pipe coiling on spool, shell is equipped with the targeting port passed through for conduit, and one end of conduit is equipped with the clamping of clamping intestinal stent
Part, clamping element stretch out targeting port.
The present invention is further arranged to: actuator is motor, and motor is electrically connected with controller.
The present invention is further arranged to: alimentary canal model includes the esophagus model and esophagus being connected that be open with oral area
The gastrointestinal model that the stomach model and both ends that model is connected are connected with stomach model and anus opening respectively.
The present invention is further arranged to: human simulation model includes head model, the first model and the second model, head model
Front be equipped with head opening, the front of the first model is equipped with the first opening, and the front of the second model is equipped with the second opening, three kinds
Model is connected, and oral area opening is placed on head model, and anus opening is placed on the second model, and the first model is connected to second
On model, head model is detachably connected on the first model.
The present invention is further arranged to: bracket includes pedestal, telescopic rod, two fixed handles and is used to connect the first model
It include first assembly, the second component and universal wheel on pedestal, first assembly and the second component are equipped with the connection strap of device for posting
Groove, two grooves are mutually perpendicular to engage, and first assembly and the second component are detachably connected, and universal wheel is fixedly connected on first group
The lower end at the both ends of part and the second component, telescopic rod is fixedly connected on pedestal, fixed handle be fixedly connected on the first model and
On second model, in use, telescopic rod passes through two fixed handles, human simulation model is fixed on telescopic rod, connection strap card
It covers in the upper end of telescopic rod.
The present invention is further arranged to: the second model is equipped with connector, and connector includes support tube, support rod, the first peace
Seat and the second mounting base are filled, one end of support rod connects the first mounting base, and the first mounting base is fixedly connected on the first model, states
The other end of support rod is connected with piston, and piston is plugged in support tube, is adapted to form closed cavity with the inner wall of cavity,
And it is moved in cavity, the other end of support tube connects the second mounting base, and the second mounting base is fixedly connected on the second model
On, the lower end of the first model is hinged on the upper end of the second model, and the first model can make the first opening relative to the second model rotation
With the second opening closure, the cabinet that can accommodate other parts is formed.
The present invention is further arranged to: simulation obstruction device be set on gastrointestinal model, simulation obstruction device include protective cover and
Air bag, air bag are built in urgent gastrointestinal model in protective cover and form simulation bowel obstruction.
The present invention is further arranged to: simulation obstruction device is transparent.
To sum up, the invention has the following advantages: making gastrointestinal model simulate bowel obstruction by simulation obstruction device
Simulate disease, enter alimentary canal model using device for posting control intestinal stent, reach scheduled position, when demonstration operation need into
Capable steps necessary, and allow patient and its family members to understand intestinal stent implantation by explanation.It through the invention can be intuitive
Understand how intestinal stent is placed to enteron aisle position, can allow patient and its family members that can be more readily understood that the operation.
Detailed description of the invention
Fig. 1 is a kind of structural representation front view of intestinal stent implantation apparatus for demonstrating；
Fig. 2 is a kind of human simulation model schematic perspective view of intestinal stent implantation apparatus for demonstrating；
Fig. 3 is a kind of device for posting structural schematic diagram of intestinal stent implantation apparatus for demonstrating；
Fig. 4 is a kind of structural representation rearview of intestinal stent implantation apparatus for demonstrating；
Fig. 5 is that device structural schematic diagram is blocked in a kind of simulation of intestinal stent implantation apparatus for demonstrating.
Appended drawing reference: 1, bracket；11, pedestal；111, first assembly；112, the second component；113, universal wheel；114, recessed
Slot；12, telescopic rod；13, fixed handle；14, connection strap；
2, human simulation model；21, oral area is open；22, anus is open；23, head model；231, head opening；24, first
Model；241, the first opening；25, the second model；251, the second opening；26,；261, support tube；262, support rod；263, first
Mounting base；264, the second mounting base；
3, alimentary canal model；31, esophagus model；32, stomach model；33, gastrointestinal model；
4, device for posting；41, shell；411, targeting port；42 conduits；421, clamping element；43, around spool；44, actuator；
5, controller；6, simulation obstruction device；61, protective cover；62, air bag.
Specific embodiment
With reference to the accompanying drawings and examples, the present invention is described in more detail.Wherein identical components are with identical
Appended drawing reference indicates.It should be noted that word "front", "rear" used in the following description, "left", "right", "up" and "down"
Refer to that the direction in attached drawing, word " bottom surface " and " top surface ", "inner" and "outside" are referred respectively to towards or away from particular elements
The direction of geometric center.
Referring to Fig.1 shown in -5, a kind of intestinal stent implantation apparatus for demonstrating, including bracket 1 and transparent simulated humanbody mould
Type 2, human simulation model 2 are arranged on bracket 1, and human simulation model 2 is built-in with alimentary canal model 3, and alimentary canal model 3 is that transparent have
Elasticity, artificial human body model 2 is equipped with the oral area opening 21 and anus opening 22 being inserted into for intestinal stent, alimentary canal model 3
One end is connected oral area opening 21, and the other end of alimentary canal model 3 is connected anus opening 22, and bracket 1 is provided with control
Intestinal stent is placed in the device for posting 4 of alimentary canal model 3, and alimentary canal model 3 is equipped with the simulation for simulating bowel obstruction and blocks
Device 6.The simulation disease that bowel obstruction is simulated by simulation obstruction device 6, controls intestinal stent using device for posting 4 and enters alimentary canal
Model 3, reaches scheduled position, the steps necessary that when demonstration operation needs to carry out, and allows patient and its family members by explanation
Solve intestinal stent implantation.It can get information about how intestinal stent is placed to enteron aisle position through the invention, can allow trouble
Person and its family members can be more readily understood that the operation.
Device for posting 4 includes shell 41, conduit 42, around spool 43 and actuator 44, and shell 41 is detachably connected on bracket 1
On, actuator 44 is fixedly connected in shell 41, and the actuator 44 for driving and rotating around spool 43 is connected to around one end of spool 43
On, 42 coiling of conduit is on spool 43, and shell 41 is equipped with the targeting port 411 passed through for conduit 42, and one end of conduit 42 is equipped with
The clamping element 421 of clamping intestinal stent simultaneously stretches out targeting port 411.42 coiling of conduit on spool 43, is reducing storage conduit 42
Required space is also convenient for using conduit 42 has enough length that intestinal stent is placed in alimentary canal model 3, conduit 42, coiling
Axis 43 and actuator 44 are placed in shell 41, are dismantled convenient for device for posting 4, and shift position is reinstalled, and device for posting may be mounted at
It is also mountable at anus opening 22 at oral area opening 21.It is rotated, can be indirectly controlled around spool 43 by the control of actuator 44
Conduit 42 is stretched out from targeting port 411, is accurately entered in oral area opening 21 or anus opening 22, for demonstrating intestinal stent implantation
Different therapeutic schemes.
Actuator 44 is motor, and motor is electrically connected with controller 5.Motor is easy to control, and reaction is fast, easy to use.It uses
Controller 5 controls motor, by improving the degree of automation, simplifies demonstration difficulty, it is not easy to there is mistake, can it is more objective and
Analysing patient's condition is intuitively carried out, helps to explain therapeutic scheme.
Alimentary canal model 3 includes the esophagus model 31 being connected with oral area opening 21, is connected with esophagus model 31
Stomach model 32 and both ends respectively with 22 gastrointestinal models 33 that are connected of stomach model 32 and anus opening.Design of part
Simply, it and is conveniently replaceable a certain component and is conducive to operation and maintenance without integral replacing.
Human simulation model 2 includes that head model 23, the first model 24 and the second model 25, the front of head model 23 are equipped with
Head opening 231, the front of the first model 24 are equipped with the first opening 241, and the front of the second model is equipped with the second opening 251, and three
Kind model is connected, and oral area opening 21 is placed on head model 23, and anus opening 22 is placed on the second model 25, the first model
24 are connected on the second model 25, and head model 23 is detachably connected on the first model 24.Model is equipped with opening, can be more
Intuitive observation is internal, is divided into several parts, convenient for simplifying design of part, is unlikely to too complex, reduces cost, be easy to tie up
Shield.
Bracket 1 is including pedestal 11, telescopic rod 12, two fixed handles 13 and for connecting the first model 24 and device for posting 4
Connection strap 14, include first assembly 111, the second component 112 and universal wheel 113 on pedestal 11, first assembly 111 and second group
Part 112 is all provided with fluted 114, and two grooves 114 are mutually perpendicular to engage, and first assembly 111 and the second component 112 detachably connect
It connects, universal wheel 113 is fixedly connected on the both ends of first assembly 111 and the second component 112, and the lower end of telescopic rod 12 is fixedly connected on
On pedestal 11, fixed handle 13 is fixedly connected on the first model 24 and the second model 25, in use, telescopic rod 12 passes through two
Fixed handle 13, human simulation model 2 is fixed on telescopic rod 12, connection strap 14 is fastened in the upper end of telescopic rod 12.Bracket 1 makes
With the position easy to remove of universal wheel 113, first assembly 111 and the second component 112 are mutually clamped convenient for fixed and assembling positioning, are stretched
For contracting bar 12 convenient for adjusting height and reducing parking space, connection strap installation is simple, easy to use, using being detachably connected, no
It is integrated, convenient for storage, is also easy to manufacture operation and maintenance.
Second model 25 is equipped with connector 26, and connector 26 includes support tube 261, support rod 262, the first mounting base 263
The first mounting base 263 is connected with one end of the second mounting base 264, support rod 262, the first mounting base 263 is fixedly connected on first
On model 24, the other end for stating support rod 262 is connected with piston 265, and piston 265 is plugged in support tube 261, with cavity 266
Inner wall be adapted to form closed cavity 266, and moved in cavity 266, the other end of support tube 261 connection second
Mounting base 264, the second mounting base 264 are fixedly connected on the second model 25, and the lower end of the first model 24 is hinged on the second model
25 upper end, the first model 24 can be rotated relative to the second model 25, made 251 closure of the first opening 241 and the second opening, formed
The cabinet of other parts can be accommodated.Piston 265 is adapted with the inner wall of cavity 266, has stronger stiction, and will lead to
265 two sides air pressure pressure change of piston can have support for a long time to open or be closed, move so that connector 26 is not easy to stretch
The different air pressure pressure in dynamic piston two sides afterwards will push piston and move to the other side, the movement of assisting in opening or closure, until
Piston no longer moves, and facilitates the fixation of 25 relative position of the first model 24 and the second model, the cabinet that rotation closure is formed is just
In the preservation of device.
Simulation obstruction device 6 is set on gastrointestinal model 33, and simulation obstruction device 6 includes protective cover 61 and air bag 62, air bag 62
It is built in urgent gastrointestinal model 33 in protective cover 61 and forms simulation bowel obstruction.Bowel obstruction is simulated by simulation obstruction device 6
Simulation disease, intestinal stent implantation can be got information about, and embody the effect and effect of the operation.
Simulation obstruction device 6 is transparent.It can preferably observe, and more intuitive.
To sum up, the present invention demonstrates intestinal stent implantation, patient and its family members can be allowed to fully understand the operation.This
Device for posting 4 of the invention can be used in the insertion apparatus of invention, and existing Medical Devices also can be used and demonstrated.Compared to existing
The mode of explanation is demonstrated, the present invention is more intuitive, and is easy to use.
The above is only the preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-described embodiment,
All technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
For those of ordinary skill, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (9)
1. a kind of intestinal stent implantation apparatus for demonstrating, it is characterized in that: including bracket (1) and transparent artificial human body model (2),
The human simulation model (2) is arranged on bracket (1), and the human simulation model (2) is built-in with alimentary canal model (3), described to disappear
Change road model (3) be it is transparent flexible, the artificial human body model (2) is equipped with oral area be inserted into for intestinal stent and is open (21)
It is open (22) with anus, one end of the alimentary canal model (3) is connected oral area opening (21), the alimentary canal model (3)
The other end be connected anus opening (22), the bracket (1) is provided with control intestinal stent merging alimentary canal model (3)
Device for posting (4), the alimentary canal model (3) are equipped with the simulation for simulating bowel obstruction and block device (6).
2. intestinal stent implantation apparatus for demonstrating according to claim 1, it is characterized in that: the device for posting (4) includes outer
Shell (41), conduit (42), around spool (43) and actuator (44), the shell (41) is detachably connected on bracket (1), described
Actuator (44) is fixedly connected in shell (41), and described one end around spool (43) is connected to what drive was rotated around spool (43)
On actuator (44), on spool (43), the shell (41) is equipped with to be passed through conduit (42) coiling for conduit (42)
Targeting port (411), one end of the conduit (42) are equipped with the clamping element (421) of clamping intestinal stent, and the clamping element (421) is stretched
Targeting port (411) out.
3. intestinal stent implantation apparatus for demonstrating according to claim 2, it is characterized in that: the actuator (44) is electricity
Machine, the motor are electrically connected with controller (5).
4. intestinal stent implantation apparatus for demonstrating according to claim 3, it is characterized in that: the alimentary canal model (3) wraps
Include the esophagus model (31) being connected with oral area opening (21), the stomach model (32) being connected with esophagus model (31) and
The gastrointestinal model (33) that both ends are connected with stomach model (32) and anus opening (22) respectively.
5. intestinal stent implantation apparatus for demonstrating according to claim 4, it is characterized in that: the human simulation model (2) wraps
Head model (23), the first model (24) and the second model (25) are included, the front of the head model (23) is equipped with head opening
(231), the front of first model (24) is equipped with the first opening (241), and the front of second model (25) is equipped with second
It is open (251), three kinds of models are connected, and the oral area opening (21) is placed on head model (23), and the anus is opened
Mouth (22) is placed on the second model (25), and first model (24) is connected on the second model (25), the head model
(23) it is detachably connected on the first model (24).
6. intestinal stent implantation apparatus for demonstrating according to claim 5, it is characterized in that: the bracket (1) includes pedestal
(11), telescopic rod (12), two fixed handles (13) and the connection strap for connecting the first model (24) Yu device for posting (4)
It (14), include first assembly (111), the second component (112) and universal wheel (113), the first assembly on the pedestal (11)
(111) it is all provided with fluted (114) with the second component (112), two grooves (114) are mutually perpendicular to engage, first assembly
(111) it is detachably connected with the second component (112), the universal wheel (113) is fixedly connected on first assembly (111) and second group
The lower end at the both ends of part (112), the telescopic rod (12) is fixedly connected on pedestal (11), and the fixed handle (13) is fixed to be connected
It connects on the first model (24) and the second model (25), in use, telescopic rod (12) passes through two fixed handles (13), will emulate
People's model (2) is fixed on telescopic rod (12), and the connection strap (14) is fastened in the upper end of telescopic rod (12).
7. intestinal stent implantation apparatus for demonstrating according to claim 6, it is characterized in that: second model (25) is equipped with
Connector (26), the connector (26) include support tube (261), support rod (262), the first mounting base (263) and the second peace
It fills seat (264), one end of the support rod (262) connects the first mounting base (263), and first mounting base (263) is fixed to be connected
It connects on the first model (24), the other end of the support rod (262) is connected with piston (265), and the piston (265) is plugged in
It in support tube (261), is adapted to be formed closed cavity (266) with the inner wall of cavity (266), and can in cavity (266)
Mobile, the other end of the support tube (261) connects the second mounting base (264), and second mounting base (264) is fixedly connected on
On second model (25), the lower end of first model (24) is hinged on the upper end of the second model (25), first model
(24) it can be rotated relative to the second model (25), make first opening (241) and the second opening (251) closure, formation can be held
Receive the cabinets of other parts.
8. intestinal stent implantation apparatus for demonstrating according to claim 7, it is characterized in that: simulation obstruction device (6) set
It is located on gastrointestinal model (33), simulation obstruction device (6) includes protective cover (61) and air bag (62), and the air bag (62) is built-in
Urgent gastrointestinal model (33) forms simulation bowel obstruction in protective cover (61).
9. intestinal stent implantation apparatus for demonstrating according to claim 8, it is characterized in that: simulation obstruction device (6) is
Transparent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910546615.7A CN110288890B (en) | 2019-06-21 | 2019-06-21 | Intestinal canal stent implantation demonstrating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910546615.7A CN110288890B (en) | 2019-06-21 | 2019-06-21 | Intestinal canal stent implantation demonstrating device |
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| Publication Number | Publication Date |
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| CN110288890A true CN110288890A (en) | 2019-09-27 |
| CN110288890B CN110288890B (en) | 2024-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910546615.7A Active CN110288890B (en) | 2019-06-21 | 2019-06-21 | Intestinal canal stent implantation demonstrating device |
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