CN106473850A - Complexity esophageal stricture particle stenter to implant device - Google Patents
Complexity esophageal stricture particle stenter to implant device Download PDFInfo
- Publication number
- CN106473850A CN106473850A CN201610943759.2A CN201610943759A CN106473850A CN 106473850 A CN106473850 A CN 106473850A CN 201610943759 A CN201610943759 A CN 201610943759A CN 106473850 A CN106473850 A CN 106473850A
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- CN
- China
- Prior art keywords
- esophageal
- inner sleeve
- esophageal stent
- stent
- stenter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2/962—Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve
- A61F2/966—Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2/9517—Instruments specially adapted for placement or removal of stents or stent-grafts handle assemblies therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2210/00—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2210/0014—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof using shape memory or superelastic materials, e.g. nitinol
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2210/00—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2210/0014—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof using shape memory or superelastic materials, e.g. nitinol
- A61F2210/0023—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof using shape memory or superelastic materials, e.g. nitinol operated at different temperatures whilst inside or touching the human body, heated or cooled by external energy source or cold supply
- A61F2210/0028—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof using shape memory or superelastic materials, e.g. nitinol operated at different temperatures whilst inside or touching the human body, heated or cooled by external energy source or cold supply cooled
Abstract
The invention discloses a kind of complexity esophageal stricture particle stenter to implant device, including trocar sheath, inner sleeve and Esophageal Stent, the quantity of inner sleeve is 25, and be mutually socketed between inner sleeve, inner sleeve is plugged in Esophageal Stent, is fixedly connected with buckle, buckle and the snap ring clamping being arranged on Esophageal Stent inwall by rubber band in the groove of the end surface of inner sleeve, one end of trocar sheath and inner sleeve has been fixedly connected with handle, and the surface of Esophageal Stent is provided with outer wall overlay film.This complexity esophageal stricture particle stenter to implant device, it is connected with Esophageal Stent by multilamellar inner sleeve respectively, and implant Esophageal Stent at the esophageal stricture of many places respectively, having reached once performs the operation carries out the effect of stenter to implant by many places esophageal stricture, avoid and be repeatedly implanted as patient and bring misery, and by implanting multiple Esophageal Stents, it is to avoid cover the phenomenon of normal oesophageal using a long stent, be greatly reduced the foreign body sensation of patient.
Description
Technical field
The present invention relates to technical field of medical instruments, specially a kind of complexity esophageal stricture particle stenter to implant device.
Background technology
When there is esophageal carcinoma in human body, can be due to the squeezing action of tumor so that the esophagus closure of human body be blocked, thus going out
The clinical symptoms such as existing eating difficulties, in order to extend the life of patient, existing Medical Technology is by implanting particle support, passing through
Radioactive particle is continual to kill sick cell, and by delivering at obstruction support, makes esophagectasia by force；So
And because the degree of the state of an illness is different, also have the narrow situation in esophagus many places to occur, and medically referred to as complexity esophageal stricture, right
In this situation, common processing method is by narrow for many places whole coverings with a dolichoesophagus support, or is implanted by multiple
Many places esophageal stricture is covered each by by support, then because Esophageal Stent belongs to extraneous implantation, is not belonging to human body itself, institute after all
Although all being covered stenosis with being completely covered with a dolichoesophagus support, also normal oesophageal being also carried out covering simultaneously, giving
Human body brings more foreign body sensations, and is repeatedly implanted and be covered each by although foreign body sensation can be reduced, but multiple implantation also can
Bring bigger misery for patient, be simultaneously implanted the more clinical risks of number of times also bigger.
Content of the invention
For the deficiencies in the prior art, the invention provides a kind of complexity esophageal stricture particle stenter to implant device, solution
Having determined, esophaguses many places are narrow to need repeatedly implantation support to bring bigger misery to patient, or a piece long stent of implantation carries to patient
Carry out the problem of bigger foreign body sensation.
For achieving the above object, the present invention provides following technical scheme：A kind of complexity esophageal stricture particle stenter to implant
Device, including trocar sheath, inner sleeve and Esophageal Stent, the quantity of described inner sleeve is 2-5, and mutually covers between inner sleeve
Connect, described inner sleeve is plugged in Esophageal Stent, be fixedly connected by rubber band in the groove of the end surface of described inner sleeve
There are buckle, described buckle and the snap ring clamping being arranged on Esophageal Stent inwall, one end of described trocar sheath and inner sleeve is all fixing
It is connected with handle, the surface of described Esophageal Stent is provided with outer wall overlay film.
It is as follows that complexity esophageal stricture particle stenter to implant device lays operating procedure：
Esophageal Stent is put in refrigerating cabinet and is freezed, Esophageal Stent is cooled to less than 4 degrees Celsius, by 2-5 esophageal branchess
Frame is socketed in the surface of 2-5 inner sleeve respectively, by snap ring and grab clamping, and Esophageal Stent compression is made it deform so that
Esophageal Stent shrinks and attenuates, and inner sleeve is inserted in standby in trocar sheath.
During operation, first using contrast machine to patient's pathological tissues radiography, under the supervision of X-ray machine, trocar sheath is inserted patient
At the esophageal stricture of least significant end, subsequently trocar sheath is moved to pumpback, make first Esophageal Stent exposed, lose trocar sheath to esophagus
The supporting role of wall, esophagus bounces back, and Esophageal Stent is wrapped up, by body temperature, Esophageal Stent is heated, thus arousing
The shape memory of Esophageal Stent, reply quickly is original-pack, and esophagus is strutted, due to the snap ring on Esophageal Stent and buckle clamping,
Prevent Esophageal Stent from departing from during diastole, slip in patient's esophagus, do not enter into the position of anticipation, and along with esophaguses
The expansion rubber band of support is stretched, and Esophageal Stent struts rear tightly clamping and between esophagus completely, and inner sleeve is pushed away into esophagus
Send 1-2 centimetre, so that buckle is departed from snap ring, subsequently outwards twitch inner sleeve, make the inside of inner sleeve retraction next one inner sleeve,
Make Esophageal Stent stay at esophageal stricture to strut esophagus, and remaining Esophageal Stent is delivered to successively by esophageal stricture with same method
Place, so that particle stenter to implant completes.
Preferably, the tubular structure that described Esophageal Stent is compiled into for nickel-titanium memory tinsel, nickel-titanium memory metal is tangible
Shape memory function has excellent elasticity, can arbitrarily reduce below 4 degrees Celsius deformation and nonelastic, when temperature be more than 30 degrees Celsius
When can arouse its memory to shape, thus recovering tubular structure.
Preferably, the tube wall of described inner sleeve is 0.5 millimeter, and the inner sleeve that the inner sleeve of each internal layer is socketed than outer layer
The diameter of pipe is little 1 millimeter, 15 centimetres of length length.
Preferably, the inwall of described trocar sheath is provided with the thermal insulation layer that glass fibre is made.
Preferably, described outer wall overlay film is monolayer silicone rubber.
The invention provides a kind of complexity esophageal stricture particle stenter to implant device.Possesses following beneficial effect：
This complexity esophageal stricture particle stenter to implant device, by arranging multilamellar inner sleeve, and on multilamellar inner sleeve respectively
It is connected with Esophageal Stent, after making trocar sheath go deep into esophagus, multilamellar inner sleeve is sent at esophageal stricture, and in many places esophageal stricture
Place implants Esophageal Stent respectively, and having reached once performs the operation carries out the effect of stenter to implant by many places esophageal stricture, it is to avoid repeatedly
It is implanted as patient and bring misery, and by implanting multiple Esophageal Stents, it is to avoid cover positive often to eat using a long stent
The phenomenon in road, is greatly reduced the foreign body sensation of patient.
Brief description
Fig. 1 is the cross-sectional view of front view of the present invention；
Fig. 2 is the cross-sectional view of local of the present invention.
In figure：1 trocar sheath, 2 inner sleeves, 3 Esophageal Stents, 4 rubber bands, 5 buckles, 6 snap rings, 7 handles, 8 outer wall overlay films.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of protection of the invention.
As shown in Figure 1-2, the present invention provides a kind of technical scheme：A kind of complexity esophageal stricture particle stenter to implant dress
Put, including trocar sheath 1, inner sleeve 2 and Esophageal Stent 3, the inwall of trocar sheath 1 is provided with the thermal insulation layer that glass fibre is made, lead to
Cross setting thermal insulation layer, prevent the Esophageal Stent 3 in trocar sheath 1 from being affected by temperature, expand in the state of not extending out, food
The tubular structure that pipe holder 3 is compiled into for nickel-titanium memory tinsel, nickel-titanium memory metal has shape memory function to have excellent bullet
Property, can arbitrarily reduce below 4 degrees Celsius deformation and nonelastic, when temperature be more than 30 degrees Celsius when can arouse its note to shape
Recall, thus recovering tubular structure, the quantity of inner sleeve 2 is 2-5, and is mutually socketed between inner sleeve 2, the tube wall of inner sleeve 2
For 0.5 millimeter, and the diameter of inner sleeve 2 that the inner sleeve 2 of each internal layer is socketed than outer layer is little 1 millimeter, length is long 15 centimetres,
The inner sleeve 2 alloing internal layer is twitched in outer layer inner sleeve 2, reaches flexible effect, and inner sleeve 2 is plugged on esophaguses
In support 3, in the groove of the end surface of inner sleeve 2, buckle 5 is fixedly connected with by rubber band 4, buckle 5 be arranged on esophaguses
Snap ring 6 clamping of support 3 inwall, one end of trocar sheath 1 and inner sleeve 2 has been fixedly connected with handle 7, the surface of Esophageal Stent 3
Be provided with outer wall overlay film 8, outer wall overlay film 8 is monolayer silicone rubber, and silicone rubber has antiacid erosion-resisting effect, effectively prevent by
Stomach corrosion, and it is effectively protected esophagus inwall.
It is as follows that complexity esophageal stricture particle stenter to implant device lays operating procedure：
Esophageal Stent 3 is put in refrigerating cabinet and is freezed, Esophageal Stent 3 is cooled to less than 4 degrees Celsius, by 2-5 esophaguses
Support 3 is socketed in the surface of 2-5 inner sleeve 2 respectively, by snap ring 6 and grab 5 clamping, and Esophageal Stent 3 compression is made it become
Shape, so that Esophageal Stent 3 contraction attenuates, inner sleeve 2 is inserted in standby in trocar sheath 1.
During operation, first using contrast machine to patient's pathological tissues radiography, under the supervision of X-ray machine, trocar sheath 1 is inserted disease
At the esophageal stricture of people's least significant end, subsequently trocar sheath 1 is moved to pumpback, make first Esophageal Stent 3 exposed, lose trocar sheath 1
Supporting role to esophageal wall, esophagus bounces back, and Esophageal Stent 3 is wrapped up, by body temperature, Esophageal Stent 3 is heated,
Thus arousing the shape memory of Esophageal Stent 3, reply quickly is original-pack, and esophagus is strutted, due to the snap ring 6 on Esophageal Stent 3
With buckle 5 clamping, prevent Esophageal Stent 3 from departing from during diastole, slip in patient's esophagus, do not enter into the position of anticipation,
And the expansion rubber band 4 along with Esophageal Stent 3 is stretched, Esophageal Stent 3 struts rear tightly clamping and between esophagus completely, will
Inner sleeve 2 pushes 1-2 centimetre into esophagus, so that buckle 5 is departed from snap ring 6, subsequently outwards twitches inner sleeve 2, so that inner sleeve 2 is contracted
Enter the inside of next inner sleeve 2, so that Esophageal Stent 3 is stayed and at esophageal stricture, esophagus is strutted, and will be remaining with same method
Esophageal Stent 3 is delivered at esophageal stricture successively, so that particle stenter to implant completes.
To sum up can obtain, this complexity esophageal stricture particle stenter to implant device, by arranging multilamellar inner sleeve 2, and in many
It is connected with Esophageal Stent 3 respectively on layer inner sleeve 2, after making trocar sheath 1 go deep into esophagus, multilamellar inner sleeve 2 is sent into esophageal stricture
Place, and implant Esophageal Stent 3 respectively at the esophageal stricture of many places, having reached once performs the operation carries out support plant by many places esophageal stricture
The effect entering, it is to avoid being repeatedly implanted as patient brings misery, and by implanting multiple Esophageal Stents 3, it is to avoid use one
Individual long stent covers the phenomenon of normal oesophageal, is greatly reduced the foreign body sensation of patient.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, permissible
Understand and can carry out multiple changes, modification, replacement to these embodiments without departing from the principles and spirit of the present invention
And modification, the scope of the present invention be defined by the appended.
Claims (5)
1. a kind of complexity esophageal stricture particle stenter to implant device, including trocar sheath（1）, inner sleeve（2）And Esophageal Stent
（3）It is characterised in that：Described inner sleeve（2）Quantity be 2-5, and inner sleeve（2）Between be mutually socketed, described inner sleeve
（2）It is plugged on Esophageal Stent（3）Interior, described inner sleeve（2）End surface groove in pass through rubber band（4）It is fixedly connected with
Buckle（5）, described buckle（5）Be arranged on Esophageal Stent（3）The snap ring of inwall（6）Clamping, described trocar sheath（1）And inner sleeve
（2）One end be fixedly connected with handle（7）, described Esophageal Stent（3）Surface be provided with outer wall overlay film（8）；Complexity is eaten
It is as follows that road narrow particle stenter to implant device lays operating procedure：By Esophageal Stent（3）Put in refrigerating cabinet and freezed, will eat
Pipe holder（3）It is cooled to less than 4 degrees Celsius, by 2-5 Esophageal Stent（3）It is socketed in 2-5 inner sleeve respectively（2）Surface,
By snap ring（6）With grab（5）Clamping, and by Esophageal Stent（3）Compression makes it deform so that Esophageal Stent（3）Contraction attenuates, will
Inner sleeve（2）It is inserted in trocar sheath（1）Interior standby；During operation, first using contrast machine to patient's pathological tissues radiography, in X-ray machine
By trocar sheath under supervision（1）At the esophageal stricture of insertion patient's least significant end, subsequently by trocar sheath（1）Move to pumpback, make first
Esophageal Stent（3）Exposed, lose trocar sheath（1）Supporting role to esophageal wall, esophagus bounces back, by Esophageal Stent（3）Parcel, leads to
Cross body temperature to Esophageal Stent（3）Heated, thus arousing Esophageal Stent（3）Shape memory, reply quickly is original-pack,
Esophagus is strutted, due to Esophageal Stent（3）On snap ring（6）With buckle（5）Clamping, prevents Esophageal Stent（3）In diastole process
Middle disengaging, slips in patient's esophagus, does not enter into the position of anticipation, and along with Esophageal Stent（3）Expansion rubber band（4）
It is stretched, Esophageal Stent（3）Tightly clamping and between esophagus after strutting completely, by inner sleeve（2）Push 1-2 centimetre into esophagus,
Make buckle（5）With snap ring（6）Depart from, subsequently outwards twitch inner sleeve（2）, make inner sleeve（2）Retraction next one inner sleeve（2）'s
Inside, makes Esophageal Stent（3）Stay and at esophageal stricture, esophagus is strutted, and with same method by remaining Esophageal Stent（3）Successively
Deliver at esophageal stricture, so that particle stenter to implant completes.
2. a kind of complexity esophageal stricture particle stenter to implant device according to claim 1 it is characterised in that：Described food
Pipe holder（3）The tubular structure being compiled into for nickel-titanium memory tinsel, it is excellent that nickel-titanium memory metal has shape memory function to have
Elasticity, can arbitrarily reduce below 4 degrees Celsius deformation and nonelastic, when temperature be more than 30 degrees Celsius when can arouse it to shape
Memory, thus recover tubular structure.
3. a kind of complexity esophageal stricture particle stenter to implant device according to claim 1 it is characterised in that：Described interior
Sleeve pipe（2）Tube wall be 0.5 millimeter, and the inner sleeve of each internal layer（2）Inner sleeve than outer layer socket（2）Diameter little by 1
Millimeter, 15 centimetres of length length.
4. a kind of complexity esophageal stricture particle stenter to implant device according to claim 1 it is characterised in that：Described outer
Sleeve pipe（1）Inwall be provided with the thermal insulation layer that glass fibre is made.
5. a kind of complexity esophageal stricture particle stenter to implant device according to claim 1 it is characterised in that：Described outer
Wall overlay film（8）For monolayer silicone rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610943759.2A CN106473850B (en) | 2016-11-02 | 2016-11-02 | Complexity esophageal stricture particle stenter to implant device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610943759.2A CN106473850B (en) | 2016-11-02 | 2016-11-02 | Complexity esophageal stricture particle stenter to implant device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106473850A true CN106473850A (en) | 2017-03-08 |
| CN106473850B CN106473850B (en) | 2018-05-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610943759.2A Expired - Fee Related CN106473850B (en) | 2016-11-02 | 2016-11-02 | Complexity esophageal stricture particle stenter to implant device |
Country Status (1)
| Country | Link |
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| CN (1) | CN106473850B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107212954A (en) * | 2017-07-18 | 2017-09-29 | 高勇 | Esophageal Stent component and foreign body in esophagus auxiliary extractor |
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|---|---|---|---|---|
| US20080234795A1 (en) * | 2007-03-22 | 2008-09-25 | Xtent, Inc. | Devices and methods for controlling expandable prostheses during deployment |
| US20090234428A1 (en) * | 2004-06-28 | 2009-09-17 | Xtent, Inc. | Devices and methods for controlling expandable prostheses during deployment |
| CN101938959A (en) * | 2007-11-28 | 2011-01-05 | 威尔逊-库克医学公司 | Double loaded stent delivery system |
| CN102917669A (en) * | 2010-06-02 | 2013-02-06 | 美敦力公司 | Transcatheter delivery system and method with controlled expansion and contraction of prosthetic heart vavle |
| CN103750929A (en) * | 2014-01-10 | 2014-04-30 | 曹莹莹 | Nickel-titanium memory alloy esophageal stent placing and recycling device used in X-ray perspective |
-
2016
- 2016-11-02 CN CN201610943759.2A patent/CN106473850B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090234428A1 (en) * | 2004-06-28 | 2009-09-17 | Xtent, Inc. | Devices and methods for controlling expandable prostheses during deployment |
| US20080234795A1 (en) * | 2007-03-22 | 2008-09-25 | Xtent, Inc. | Devices and methods for controlling expandable prostheses during deployment |
| CN101938959A (en) * | 2007-11-28 | 2011-01-05 | 威尔逊-库克医学公司 | Double loaded stent delivery system |
| CN102917669A (en) * | 2010-06-02 | 2013-02-06 | 美敦力公司 | Transcatheter delivery system and method with controlled expansion and contraction of prosthetic heart vavle |
| CN103750929A (en) * | 2014-01-10 | 2014-04-30 | 曹莹莹 | Nickel-titanium memory alloy esophageal stent placing and recycling device used in X-ray perspective |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107212954A (en) * | 2017-07-18 | 2017-09-29 | 高勇 | Esophageal Stent component and foreign body in esophagus auxiliary extractor |
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| Publication number | Publication date |
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| CN106473850B (en) | 2018-05-01 |
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Granted publication date: 20180501 Termination date: 20191102 |