Wireless implantable medical device
First Claim
1. A wireless implantable medical device comprising:
- a device housing;
at least one radio frequency circuit for radio frequency communication of a monitoring signal with an external unit;
at least one antenna;
at least one terminal to electromagnetically couple said at least one antenna to said at least one radio frequency circuit; and
a dielectric compartment that encompasses at least a portion of said at least one antenna and at least a portion of at least one therapy-lead;
said at least one antenna comprises a conducting pattern, at least a portion of which is shaped as a curve, wherein said curve comprises at least five segments, wherein each of said at least five segments forms an angle with each adjacent segment in said curve, wherein at least three of the at least five segments of said curve are shorter than one-fifth of the longest free-space operating wavelength of the antenna, wherein each angle between adjacent segments is less than 180°
, and at least two of the angles between adjacent sections are less than approximately 115°
;
said curve is arranged such that at least two of the angles are defined respectively in the clockwise and counter-clockwise directions at opposite sides of said curve to minimize an inductive coiling effect;
wherein said at least two angles are smaller than 180°
; and
the at least one therapy-lead comes out from the device housing via feedthroughs into a region covered by the dielectric compartment.
2 Assignments
0 Petitions
Accused Products
Abstract
One aspect of the invention relates to an implantable medical device comprising a device housing (100), at least one radio frequency circuit (104) for radio frequency communication, at least one antenna, at least one terminal to electromagnetically couple said at least one antenna to said at least one radio frequency circuit, and a dielectric compartment (101, 1661) that encompasses at least a portion of said at least one antenna. The antenna comprises a conducting pattern, at least a portion of which is shaped as a curve, wherein said curve comprises at least five segments, wherein each of said at least five segments forms an angle with each adjacent segment in said curve, wherein at least three of the at least five segments of said curve are shorter than one-fifth of the longest free-space operating wavelength of the antenna, wherein each angle between adjacent segments is less than 180°, and at least two of the angles between adjacent sections are less than approximately 115°.
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Citations
67 Claims
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1. A wireless implantable medical device comprising:
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a device housing; at least one radio frequency circuit for radio frequency communication of a monitoring signal with an external unit; at least one antenna; at least one terminal to electromagnetically couple said at least one antenna to said at least one radio frequency circuit; and a dielectric compartment that encompasses at least a portion of said at least one antenna and at least a portion of at least one therapy-lead; said at least one antenna comprises a conducting pattern, at least a portion of which is shaped as a curve, wherein said curve comprises at least five segments, wherein each of said at least five segments forms an angle with each adjacent segment in said curve, wherein at least three of the at least five segments of said curve are shorter than one-fifth of the longest free-space operating wavelength of the antenna, wherein each angle between adjacent segments is less than 180°
, and at least two of the angles between adjacent sections are less than approximately 115°
;said curve is arranged such that at least two of the angles are defined respectively in the clockwise and counter-clockwise directions at opposite sides of said curve to minimize an inductive coiling effect; wherein said at least two angles are smaller than 180°
; andthe at least one therapy-lead comes out from the device housing via feedthroughs into a region covered by the dielectric compartment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59)
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60. A wireless implantable medical device comprising:
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a metallic housing, an electronic circuit that provides a medical function, a radio frequency circuit for radio frequency communication, a power source, an antenna, a radio frequency ground plane, a first terminal to electromagnetically couple the antenna to the radio frequency circuit; a second terminal to electromagnetically couple said radio frequency ground plane to the radio frequency circuit, and a dielectric header that encompasses at least a portion of said antenna; wherein said antenna comprises a conducting pattern, at least a portion of which includes a curve, said curve being shaped as a space-filling curve and featuring a box-counting dimension larger than 1.15; wherein said curve is arranged such that at least two of the angles are defined respectively in the clockwise and counter-clockwise directions at opposite sides of said curve; wherein said at least two angles are smaller than 180°
;said antenna comprising a first portion and a second portion, wherein said first portion protrudes from said metallic housing, and wherein the second portion is substantially perpendicular to said first portion;
with said second portion arranged substantially perpendicular to the contact surface between the metallic housing and said dielectric header to minimize the projection of the second portion on the metallic housing;wherein said antenna is an unbalanced antenna selected from the group consisting essentially of;
monopole, IFA, patch, PIFA, and slot; and
with said ground plane being coupled either through direct contact or electromagnetic coupling to the metallic housing at RF frequencies; andwherein said wireless implantable medical device is used as part of a system to provide remote monitoring of the medical condition of a human being, in which said wireless implantable medical device implements the functionality of cardiac rhythm management, and communicates with at least one external unit via a radiofrequency link operating at least at one of the ISM frequency bands.
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61. A radiofrequency communication system comprising at least one remote unit, wherein the radiofrequency communication system further comprises at least one wireless implantable medical device, the wireless implantable medical device comprising:
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a device housing; at least one radio frequency circuit for radio frequency communication of a monitoring signal with an external unit; at least one antenna; at least one terminal to electromagnetically couple said at least one antenna to said at least one radio frequency circuit; a dielectric compartment that encompasses at least a portion of said at least one antenna, wherein said at least one antenna comprises a conducting pattern, at least a portion of which is shaped as a curve, wherein said curve comprises at least five segments, wherein each of said at least five segments forms an angle with each adjacent segment in said curve, wherein at least three of the at least five segments of said curve are shorter than one-fifth of the longest free-space operating wavelength of the antenna, wherein each angle between adjacent segments is less than 180°
, and at least two of the angles between adjacent sections are less than approximately 115°
;wherein said curve is arranged such that at least two of the angles are defined respectively in the clockwise and counter-clockwise directions at opposite sides of said curve to minimize an inductive coiling effect; wherein said at least two angles are smaller than 180°
;said at least one antenna is arranged substantially perpendicular to a contact surface between the device housing and the dielectric compartment to reduce the capacitive coupling to the device housing; and wherein said at least one remote unit is arranged for radio frequency communication with said at least one wireless implantable medical device. - View Dependent Claims (62, 63, 64, 65)
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66. Use of a wireless implantable medical device for monitoring at least one physiological variable of a human being or an animal, the wireless implantable medical device comprising:
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a device housing; at least one radio frequency circuit for radio frequency communication of a monitoring signal with an external unit; at least one antenna; at least one terminal to electromagnetically couple said at least one antenna to said at least one radio frequency circuit; a dielectric compartment that encompasses at least a portion of said at least one antenna, wherein said at least one antenna comprises a conducting pattern, at least a portion of which is shaped as a curve, wherein said curve comprises at least five segments, wherein each of said at least five segments forms an angle with each adjacent segment in said curve, wherein at least three of the at least five segments of said curve are shorter than one-fifth of the longest free-space operating wavelength of the antenna, wherein each angle between adjacent segments is less than 180°
, and at least two of the angles between adjacent sections are less than approximately 115°
;wherein said curve is arranged such that at least two of the angles are defined respectively in the clockwise and counter-clockwise directions at opposite sides of said curve to minimize an inductive coiling effect; said at least one antenna protrudes from the device housing; at least one end of the at least one antenna is placed substantially far from the device housing to improve a performance of the at least one antenna; and wherein said at least two angles are smaller than 180°
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67. Use of a wireless implantable medical device for applying stimuli to a body of a human being or an animal, the wireless implantable medical device comprising:
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a device housing; at least one radio frequency circuit for radio frequency communication of an actuation signal with an external unit; at least one antenna; a radio frequency (RF) ground plane; at least one terminal to electromagnetically couple said at least one antenna to said at least one radio frequency circuit; and a dielectric compartment that encompasses at least a portion of said at least one antenna, wherein said at least one antenna comprises a conducting pattern, at least a portion of which is shaped as a curve, wherein said curve comprises at least five segments, wherein each of said at least five segments forms an angle with each adjacent segment in said curve, wherein at least three of the at least five segments of said curve are shorter than one-fifth of the longest free-space operating wavelength of the antenna, wherein each angle between adjacent segments is less than 180°
, and at least two of the angles between adjacent sections are less than approximately 115°
;wherein said curve is arranged such that at least two of the angles are defined respectively in the clockwise and counter-clockwise directions at opposite sides of said curve; wherein said at least two angles are smaller than 180°
;said at least one antenna is grounded via at least one grounding terminal to the RF ground plane to control an input impedance of said at least one antenna; and a region of the wireless implantable medical device is coated with a layer of biocompatible material to enhance insulation between the wireless implantable medical device and surrounding body tissues.
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Specification