GB2619646A - Method - Google Patents
Method Download PDFInfo
- Publication number
- GB2619646A GB2619646A GB2314223.5A GB202314223A GB2619646A GB 2619646 A GB2619646 A GB 2619646A GB 202314223 A GB202314223 A GB 202314223A GB 2619646 A GB2619646 A GB 2619646A
- Authority
- GB
- United Kingdom
- Prior art keywords
- radiation
- sma wire
- movable element
- sma
- wire
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract 15
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims abstract 44
- 230000005855 radiation Effects 0.000 claims abstract 17
- 239000012530 fluid Substances 0.000 claims abstract 12
- 239000011358 absorbing material Substances 0.000 claims 4
- 239000000470 constituent Substances 0.000 claims 3
- 238000010438 heat treatment Methods 0.000 claims 3
- 239000000463 material Substances 0.000 claims 3
- 229910001566 austenite Inorganic materials 0.000 claims 2
- 238000002835 absorbance Methods 0.000 claims 1
- 230000008602 contraction Effects 0.000 claims 1
- 230000004044 response Effects 0.000 claims 1
- 230000006335 response to radiation Effects 0.000 claims 1
- 230000003068 static effect Effects 0.000 claims 1
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
- A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
- A61F9/007—Methods or devices for eye surgery
- A61F9/00781—Apparatus for modifying intraocular pressure, e.g. for glaucoma treatment
-
- 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
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0001—Means for transferring electromagnetic energy to implants
Landscapes
- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- Heart & Thoracic Surgery (AREA)
- Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Micromachines (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
A method of controlling a flow control device (100). The device includes a fluid path (104), a movable element (101), and a shape memory alloy (SMA) wire (103) for moving the movable element (101) in one direction or sense so as to cause the resistance of the fluid path (104) to increase or decrease. The device (100) is configured such that the movable element (101) does not move when no energy is supplied to the device (100). The method involves directing radiation (106) at an area of the device (100) so as to preferentially heat a portion of the SMA wire (103) and hence cause the portion of the SMA wire (103) to contract by a relatively large amount while another portion of the SMA wire (103) does not contract or contracts by a relatively small amount, wherein the radiation (106) is controlled so as to control the size of the portion of the SMA wire (103) that is preferentially heated and hence the resistance of the fluid path (104).
Claims (21)
1. A method of controlling a flow control device, wherein the device comprises a fluid path, a movable element, and a shape memory alloy (SMA) wire for moving the movable element in one direction or sense so as to cause the resistance of the fluid path to increase or decrease, the device configured such that the movable element does not move when no energy is supplied to the device, the method comprising: directing radiation at an area of the device so as to preferentially heat a portion of the SMA wire and hence cause the portion of the SMA wire to contract by a relatively large amount while another portion of the SMA wire does not contract or contracts by a relatively small amount, wherein the radiation is controlled so as to control the size of the portion of the SMA wire that is preferentially heated and hence the resistance of the fluid path.
2. A method according to claim 1 comprising: determining that a position of the movable element differs from a target position; and controlling the radiation so as to change the size of the portion of the SMA wire that is preferentially heated and hence move the movable element towards the target position.
3. A method according to claim 1 or 2 comprising controlling the size and/or location of the area of the device onto which the radiation is directed so as to control the size of the portion of the SMA wire that is preferentially heated.
4. A method according to any preceding claim wherein directing the radiation at the area of the device comprises: directing a static beam of radiation at the area.
5. A method according to any preceding claim wherein directing the radiation at the area of the device comprises: moving a beam of radiation over the area
6. A method according to any preceding claim wherein the radiation is directed at the area of the device for a period of time that is longer than the time required for the temperature of the SMA wire to reach a substantially steady state.
7. A method according to any preceding claim wherein preferentially heating the portion of the SMA wire causes the portion of the SMA wire to contract by more than 80% while the other portion of the SMA wire contracts by less than 20%.
8. A method according to any preceding claim wherein preferentially heating the portion of the SMA wire comprises heating the portion of the SMA wire to above the austenite start temperature, while the other portion of the SMA wire remains below the austenite start temperature.
9. A method according to any preceding claim wherein the overall contraction of the SMA wire is substantially proportional to the ratio of the size of the portion of the SMA wire to the size of the other portion of the SMA wire.
10. A method according to any preceding claim wherein: the device comprises a further SMA wire for moving the movable element in an opposite direction or sense to that of the SMA wire; and the method comprises directing radiation at a further area of the device so as to preferentially heat a portion of the further SMA wire and hence cause the portion of the further SMA wire to contract by a relatively large amount while another portion of the further SMA wire does not contract or contracts by a relatively small amount.
11. A flow control device which is controllable by directing radiation at the device, wherein the device comprises: a fluid path; a movable element; at least one shape memory alloy (SMA) wire for moving the movable element so as to cause the resistance of the fluid path to change, wherein the device is configured such that the movable element does not move when no energy is supplied to the device; and a radiation-receiving region thermally coupled to the at least one SMA wire, wherein the radiation-receiving region comprises a radiation-absorbing material.
12. A device according to claim 11 wherein the radiation-receiving region comprises a structural constituent, wherein the radiation-absorbing material is provided on a surface of the structural constituent or is distributed within the structural constituent.
13. A device according to claim 11 or 12 wherein the radiation-absorbing material has a higher absorbance for the radiation by which the device is controllable than any other element of the device.
14. A device according to any one of claims 11 to 13 wherein: the device comprises a tube at least partly defining the fluid path, wherein the movable element and the at least one SMA wire are at least partly within the tube; and the radiation-receiving region forms part of the tube or is provided on the outer surface of the tube.
15. A device according to claim 14 wherein the radiation-absorbing material is at least partly transparent to visible light so as to enable the position of the movable element and/or the at least one SMA wire to be viewed.
16. A flow control device comprising: a tube at least partly defining a flow path; a movable element; at least one shape memory alloy (SMA) wire for moving the movable element so as to cause the resistance of the fluid path to change; wherein the device is configured such that the movable element does not move when no energy is supplied to the device; and wherein the movable element and the at least one SMA wire are at least partly within the tube; and wherein the tube is at least partly transparent to visible light so as to enable the position of the movable element and/or the at least one SMA wire to be viewed.
17. A device according to claim 16 wherein at least one of the movable element and the tube are provided with means for indicating the position of the movable element relative to the tube.
18. A device according to claim 17 wherein the means comprises a graduated scale.
19. A flow control device which is controllable by directing radiation at the device, wherein the device comprises: a fluid path; a movable element, at least one shape memory alloy (SMA) wire for moving the movable element so as to cause the resistance of the fluid path to change, wherein the device is configured such that the movable element does not move when no energy is supplied to the device; and a radiation-receiving region comprising a material configured to change appearance in response to a change in temperature thereof or in response to radiation having been provided thereto.
20. A device according to claim 19 wherein the material is thermochromic or luminescent.
21. A device according to claim 19 or 20: wherein the device is configured such that: radiation can be directed at an area of the radiation-receiving region so as to preferentially heat a portion of the at least one SMA wire and hence cause the portion of the at least one SMA wire to contract by a relatively large amount while another portion of the at least one SMA wire does not contract or contracts by a relatively small amount; and the material changes appearance in the area at which the radiation is directed, wherein the size and/or location of the area corresponds to the size of the portion of the at least one SMA wire that is preferentially heated.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB2102322.1A GB202102322D0 (en) | 2021-02-18 | 2021-02-18 | Method |
| PCT/GB2022/050454 WO2022175681A1 (en) | 2021-02-18 | 2022-02-18 | Method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB202314223D0 GB202314223D0 (en) | 2023-11-01 |
| GB2619646A true GB2619646A (en) | 2023-12-13 |
Family
ID=75339231
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GBGB2102322.1A Ceased GB202102322D0 (en) | 2021-02-18 | 2021-02-18 | Method |
| GB2314223.5A Pending GB2619646A (en) | 2021-02-18 | 2022-02-18 | Method |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GBGB2102322.1A Ceased GB202102322D0 (en) | 2021-02-18 | 2021-02-18 | Method |
Country Status (2)
| Country | Link |
|---|---|
| GB (2) | GB202102322D0 (en) |
| WO (1) | WO2022175681A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022159723A1 (en) | 2021-01-22 | 2022-07-28 | Shifamed Holdings, Llc | Adjustable shunting systems with plate assemblies, and associated systems and methods |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120059461A1 (en) * | 2010-02-05 | 2012-03-08 | Badawi David Y | Intraocular implants and related kits and methods |
| US20130150776A1 (en) * | 2011-12-12 | 2013-06-13 | Sebastian Böhm | Glaucoma Drainage Devices Including Vario-Stable Valves and Associated Systems and Methods |
| US20150057596A1 (en) * | 2013-08-26 | 2015-02-26 | Alcon Research, Ltd. | Passive to active staged drainage device |
| US20150257931A1 (en) * | 2014-03-13 | 2015-09-17 | Alcon Research, Ltd. | Remote Magnetic Driven Flow System |
| US20200229982A1 (en) * | 2017-07-20 | 2020-07-23 | Shifamed Holdings, Llc | Adjustable flow glaucoma shunts and methods for making and using same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11058581B2 (en) | 2017-07-20 | 2021-07-13 | Shifamed Holdings, Llc | Adjustable flow glaucoma shunts and methods for making and using same |
-
2021
- 2021-02-18 GB GBGB2102322.1A patent/GB202102322D0/en not_active Ceased
-
2022
- 2022-02-18 GB GB2314223.5A patent/GB2619646A/en active Pending
- 2022-02-18 WO PCT/GB2022/050454 patent/WO2022175681A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120059461A1 (en) * | 2010-02-05 | 2012-03-08 | Badawi David Y | Intraocular implants and related kits and methods |
| US20130150776A1 (en) * | 2011-12-12 | 2013-06-13 | Sebastian Böhm | Glaucoma Drainage Devices Including Vario-Stable Valves and Associated Systems and Methods |
| US20150057596A1 (en) * | 2013-08-26 | 2015-02-26 | Alcon Research, Ltd. | Passive to active staged drainage device |
| US20150257931A1 (en) * | 2014-03-13 | 2015-09-17 | Alcon Research, Ltd. | Remote Magnetic Driven Flow System |
| US20200229982A1 (en) * | 2017-07-20 | 2020-07-23 | Shifamed Holdings, Llc | Adjustable flow glaucoma shunts and methods for making and using same |
Also Published As
| Publication number | Publication date |
|---|---|
| GB202102322D0 (en) | 2021-04-07 |
| WO2022175681A1 (en) | 2022-08-25 |
| GB202314223D0 (en) | 2023-11-01 |
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