WO2005000391B1 - Inductive link for a medical implant - Google Patents
Inductive link for a medical implantInfo
- Publication number
- WO2005000391B1 WO2005000391B1 PCT/SE2004/001008 SE2004001008W WO2005000391B1 WO 2005000391 B1 WO2005000391 B1 WO 2005000391B1 SE 2004001008 W SE2004001008 W SE 2004001008W WO 2005000391 B1 WO2005000391 B1 WO 2005000391B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- coils
- coil
- inductive link
- primary
- circuit
- 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.)
- Ceased
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
- A61N1/372—Arrangements in connection with the implantation of stimulators
- A61N1/37211—Means for communicating with stimulators
- A61N1/37217—Means for communicating with stimulators characterised by the communication link, e.g. acoustic or tactile
- A61N1/37223—Circuits for electromagnetic coupling
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
- A61N1/372—Arrangements in connection with the implantation of stimulators
- A61N1/378—Electrical supply
- A61N1/3787—Electrical supply from an external energy source
Landscapes
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Radiology & Medical Imaging (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Acoustics & Sound (AREA)
- Prostheses (AREA)
- Near-Field Transmission Systems (AREA)
- Hall/Mr Elements (AREA)
- Measuring And Recording Apparatus For Diagnosis (AREA)
Abstract
The invention relates to an inductive link for power and signal transmission to a medical implant, preferably power and signal transmission through the skin or any other physical barrier (3) of a human being or living animal having a medical device implanted in the body. The inductive link comprises at least two coils which are orientated in space in such a way they are located on each side of said physical barrier (3), so that one of the coils, the so-called primary coil (15), is located outside the physical barrier and then forming a part of the primary circuit that generates an electromagnetic field. The other coil, the so-called secondary coil (19), is located on the other side of the physical barrier and then forming a part of the secondary circuit which can absorb and utilize the entire or a part of the magnetic field generated by the primary coil. According to the invention a sensor circuit (11) in the form of a structure of electrical conductors is arranged in a physical close relationship to the primary coil (15) in space so that a part of the magnetic field from the secondary coil (19) is enclosed by the sensor circuit thereby providing an induction in the sensor circuit which can be detected and thereby indicate the condition in the secondary circuit.
Claims
1. inductive link for power and signal transmission to a medical implant, preferably power and signal transmission through t skin or any" other physical barrier (3) of a human being or living animal -having a medical .device implanted in the body, said inductive link comprising at least two coils which ar.e orientated in space in such a way that they are located on each side of said physical barrier; and one of the coils, the so-called primary coil (15), being located outside the physical barrier and then forming -a part of the primary circuit that generates an electromagnetic field, the other coil, the so-called secondary coil (19), being located on the other side of the physical barrier and then forming a part of the secondary circuit which can absorb and utilize the entire or a part of the magnetic field emitted by the primary coil, said primary and secondary coils .having a mutual coupling coefficient (k) which is less than one c h a r a c t e r i z d i that a sensor circuit (11) in the form of a structure of electrical conductors is arranged in a physical close relationship to the primary coil (15) over the region of the primary coil (15) in which the magnetic field from- the p imary" coil" σlϊanges~Tts~ sign "and" eπclσses~ the same amount of positive and negative field so that he sum of these two fields are zero and only the magnetic field from the secondary coil (19) is sensed by the sensor circuit thereby providing an induction in the sensor circuit which can be d ec d and thereby indicate the condition in the secondary circuit only and that the sensor circuit (ii) comprises one or more e sor coils (29) which are fixed mounted on the primary coil (15) without any mutual inductive coupling to this coil.
2. Inductive link according to claim 1 c h a-r ac t-er- i z e d in that the sensor circuit (11) is arranged to sense the instantaneous voltage in the secondary circuit, i e both the amplitude and the phase of the voltage.
3. inductive link according to claim 1 c h a r a c t e ri z e i n that sensor circuit (ll) comprises a number of individual sensor coils (29a, 29bf 29c) having a coil radius which" is substantially less than the σoii radius of the primary coil and which sensor coils are distributed around the peripherieal portion of the primary coil (15) so that the total field through the individual sensor coils which originates from the primary coil (15) is zero.
4- inductive link according to claim l c h a r a c t e i z i n that the sensor circuit (ll) comprises a coil having a horseshoe-shaped winding (29 d) .
5. Inductive link according to claim 1 c h a r a c t e ri z e i n that sensor circuit (11) comprises two individual sensor coils (29e", 29e") with different coil radius centrally arranged around the primary coil (15) to provide a sensor voltage which is the difference voltage between the two individual sensor coils.
6. inductive link according to claim 1 c h a r ac t e ri z e d i that at least one of the primary and εecon-
" dairy" coi:Cs"~("ϊ5~an"d™l97""ϊδ"srpsσieively~±B• made• as--a-fiat> pancake shaped coil-
7. inductive link according to claim 1 c ha r a c t e ri z d i n that at least one of the primary and secondary coils (15 and 19, repectively) has a Litz type winding.
8- Inductive link according to claim 7 c ha r a c t ri z e d i n that at least one of the cardel wires in the Litz conductor has a thermal glue coating.
9- Inductive link according to claim 1 c har a c te- r i z e d i n that the coils are designed in such a way that a maximum of the sensed voltage is obtained for a distance between the coils that exceeds zero.
10. Inductive link according to claim 1 char a c t e i z e d i that the primary and the secondary coils (15 and 19, repectivelV) are hold together "by means" of retaining magnets located in the peripherical region of the coils.
11. Inductive link according to claim 6 c h a r ac t e i z e d i n that coils are made by means of any lito- graphic method of the type which is previously known from the printed circuit card or semiconductor Industri, preferably by means of a so-called multilayer method.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE0301925-4 | 2003-06-30 | ||
| SE0301925A SE526099C2 (en) | 2003-06-30 | 2003-06-30 | Device for wireless signal and energy transfer for medical implants |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2005000391A1 WO2005000391A1 (en) | 2005-01-06 |
| WO2005000391B1 true WO2005000391B1 (en) | 2005-04-14 |
Family
ID=27656656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/SE2004/001008 Ceased WO2005000391A1 (en) | 2003-06-30 | 2004-06-23 | Inductive link for a medical implant |
Country Status (2)
| Country | Link |
|---|---|
| SE (1) | SE526099C2 (en) |
| WO (1) | WO2005000391A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9113262B2 (en) | 2006-05-30 | 2015-08-18 | Sonitus Medical, Inc. | Methods and apparatus for transmitting vibrations |
| US9143873B2 (en) | 2007-10-02 | 2015-09-22 | Sonitus Medical, Inc. | Methods and apparatus for transmitting vibrations |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NZ535390A (en) | 2004-09-16 | 2007-10-26 | Auckland Uniservices Ltd | Inductively powered mobile sensor system |
| US7729772B2 (en) * | 2005-01-07 | 2010-06-01 | Uroplasty, Inc. | Implantable neuromodulation system and method |
| US7545272B2 (en) | 2005-02-08 | 2009-06-09 | Therasense, Inc. | RF tag on test strips, test strip vials and boxes |
| WO2008106717A1 (en) * | 2007-03-02 | 2008-09-12 | Ventrassist Pty Ltd | Transcutaneous energy transfer system |
| EP2177051B1 (en) | 2007-07-20 | 2015-06-17 | Cochlear Americas | Bone anchor fixture for a medical prosthesis |
| US10069341B2 (en) | 2007-08-21 | 2018-09-04 | Auckland Uniservices Limited | Inductively powered mobile sensor system |
| US8363871B2 (en) | 2008-03-31 | 2013-01-29 | Cochlear Limited | Alternative mass arrangements for bone conduction devices |
| CN102640521B (en) | 2009-10-02 | 2016-07-06 | 声脉有限责任公司 | For being carried out apparatus in the oral cavity of sound transmission by bone conduction |
| US8622885B2 (en) | 2010-02-19 | 2014-01-07 | Audiodontics, Llc | Methods and apparatus for aligning antennas of low-powered intra- and extra-oral electronic wireless devices |
| US8376967B2 (en) | 2010-04-13 | 2013-02-19 | Audiodontics, Llc | System and method for measuring and recording skull vibration in situ |
| US8891795B2 (en) | 2012-01-31 | 2014-11-18 | Cochlear Limited | Transcutaneous bone conduction device vibrator having movable magnetic mass |
| US11240613B2 (en) | 2014-01-30 | 2022-02-01 | Cochlear Limited | Bone conduction implant |
| US9998837B2 (en) | 2014-04-29 | 2018-06-12 | Cochlear Limited | Percutaneous vibration conductor |
| BR112018073997B1 (en) | 2016-05-24 | 2020-01-07 | Synergia Medical | SYSTEM FOR CENTERING AN EXTERNAL ELEMENT WITH REGARD TO AN IMPLANTABLE MEDICAL DEVICE AND METHOD FOR ALIGNING AN EXTERNAL ELEMENT WITH AN IMPLANTABLE MEDICAL DEVICE IMPLANTED UNDER THE SKIN OF A PATIENT |
| US10226637B2 (en) | 2016-06-15 | 2019-03-12 | Boston Scientific Neuromodulation Corporation | External charger for an implantable medical device having alignment and centering capabilities |
| US10603501B2 (en) | 2016-06-15 | 2020-03-31 | Boston Scientific Neuromodulation Corporation | External charger for an implantable medical device having at least one sense coil concentric with a charging coil for determining position |
| US10363426B2 (en) | 2016-06-15 | 2019-07-30 | Boston Scientific Neuromodulation Corporation | External charger for an implantable medical device for determining position using phase angle or a plurality of parameters as determined from at least one sense coil |
| US11129996B2 (en) * | 2016-06-15 | 2021-09-28 | Boston Scientific Neuromodulation Corporation | External charger for an implantable medical device for determining position and optimizing power transmission using resonant frequency as determined from at least one sense coil |
| US11471692B2 (en) | 2016-06-15 | 2022-10-18 | Boston Scientific Neuromodulation Corporation | External charger for an implantable medical device for adjusting charging power based on determined position using at least one sense coil |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4571589A (en) * | 1982-11-22 | 1986-02-18 | Cordis Corporation | Biomedical implant with high speed, low power two-way telemetry |
| US5565005A (en) * | 1992-02-20 | 1996-10-15 | Amei Technologies Inc. | Implantable growth tissue stimulator and method operation |
| US6058330A (en) * | 1998-03-06 | 2000-05-02 | Dew Engineering And Development Limited | Transcutaneous energy transfer device |
| US6307468B1 (en) * | 1999-07-20 | 2001-10-23 | Avid Identification Systems, Inc. | Impedance matching network and multidimensional electromagnetic field coil for a transponder interrogator |
| US6463329B1 (en) * | 2000-08-01 | 2002-10-08 | Medtronic, Inc. | Null-free antenna array for use in communication with implantable medical devices |
-
2003
- 2003-06-30 SE SE0301925A patent/SE526099C2/en not_active IP Right Cessation
-
2004
- 2004-06-23 WO PCT/SE2004/001008 patent/WO2005000391A1/en not_active Ceased
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9113262B2 (en) | 2006-05-30 | 2015-08-18 | Sonitus Medical, Inc. | Methods and apparatus for transmitting vibrations |
| US9185485B2 (en) | 2006-05-30 | 2015-11-10 | Sonitus Medical, Inc. | Methods and apparatus for processing audio signals |
| US9143873B2 (en) | 2007-10-02 | 2015-09-22 | Sonitus Medical, Inc. | Methods and apparatus for transmitting vibrations |
Also Published As
| Publication number | Publication date |
|---|---|
| SE526099C2 (en) | 2005-07-05 |
| WO2005000391A1 (en) | 2005-01-06 |
| SE0301925D0 (en) | 2003-06-30 |
| SE0301925L (en) | 2004-12-31 |
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Effective date: 20041210 |
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| DPEN | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed from 20040101) | ||
| 122 | Ep: pct application non-entry in european phase |