IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0931127
(2007-10-31)
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등록번호 |
US-8454524
(2013-06-04)
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발명자
/ 주소 |
|
출원인 / 주소 |
- Depuy Synthes Products, LLC
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인용정보 |
피인용 횟수 :
1 인용 특허 :
106 |
초록
▼
Devices and methods useful for non-invasively measuring and indicating a rate of fluid flow are disclosed. In one embodiment, a sensor housing adapted to received fluid flow therethrough is provided. A radio frequency tag and a masking element can be disposed in the sensor housing. The masking eleme
Devices and methods useful for non-invasively measuring and indicating a rate of fluid flow are disclosed. In one embodiment, a sensor housing adapted to received fluid flow therethrough is provided. A radio frequency tag and a masking element can be disposed in the sensor housing. The masking element and the radio frequency tag can be configured to move relative to one another. The relative positions or movement can alter the response of the radio frequency tag to a wireless signal (which can be emitted from an external reading device, for example) and thereby indicate a rate of fluid flowing through the housing. For example, in some embodiments, the masking element can selectively cover at least part of the radio frequency tag in correspondence to the flow rate, which can change a characteristic of the radio frequency tag's response to the wireless signal.
대표청구항
▼
1. An implantable sensor for measuring fluid flow, comprising: a sensor housing adapted to receive fluid flow therethrough;a radio frequency tag disposed within the sensor housing and adapted to interact with a wireless signal and to produce a response thereto; anda masking element disposed in the s
1. An implantable sensor for measuring fluid flow, comprising: a sensor housing adapted to receive fluid flow therethrough;a radio frequency tag disposed within the sensor housing and adapted to interact with a wireless signal and to produce a response thereto; anda masking element disposed in the sensor housing, the masking element and the radio frequency tag configured to move relative to one another to alter the response of the radio frequency tag and thereby indicate a rate of fluid flowing through the sensor housing, wherein the masking element is configured to rotate around an axis thereof in relation to the flow rate of fluid through the sensor housing. 2. The implantable sensor of claim 1, wherein the masking element comprises a conductive member that alters the response of the radio frequency tag. 3. The implantable sensor of claim 2, wherein the masking element covers at least a portion of the radio frequency tag. 4. The implantable sensor of claim 1, wherein at least one characteristic of the response corresponds to the flow rate, the at least one characteristic being selected from the group consisting of: resonant frequency, harmonic spectra, decay characteristic, and Q factor. 5. The implantable sensor of claim 1, further comprising a valve assembly adapted to control a rate of fluid flowing through the sensor housing, the valve assembly being in fluid communication with the sensor housing. 6. The implantable sensor of claim 1, wherein the masking element comprises a disk formed at least in part of a conductive material to selectively mask part of the radio frequency tag, the masking element being configured to rotate around an axis thereof to mask different parts of the radio frequency tag such that the response of the radio frequency tag to the wireless signal is periodic. 7. The implantable sensor of claim 6, wherein the part of the disk formed of the conductive material has a shape that is selected from the group consisting of a spiral and a plurality of discrete conductive sections. 8. The implantable sensor of claim 1, wherein the radio frequency tag comprises a disk having an asymmetrical antenna, the masking element configured to mask at least part of the antenna. 9. The implantable sensor of claim 1, wherein the masking element masks different portions of the radio frequency tag when the masking element and the radio frequency tag are in different rotational positions relative to one another to alter the response of the radio frequency tag and thereby indicate a rate of fluid flowing through the sensor housing. 10. The implantable sensor of claim 9, wherein the masking element is configured to rotate around the axis in a circular motion relative to the sensor housing. 11. The implantable sensor of claim 9, wherein the axis comprises a central longitudinal axis of the masking element and the masking element is configured to rotate about the axis relative to the sensor housing. 12. The implantable sensor of claim 1, wherein when the masking element and the radio frequency tag move relative to one another, a surface area of the radio frequency tag being masked by the masking element changes, thereby altering the response of the radio frequency tag. 13. An implantable sensor for measuring fluid flow, comprising: a sensor housing adapted to receive fluid flow therethrough;a radio frequency tag disposed within the sensor housing and adapted to interact with a wireless signal and to produce a response thereto; anda masking element disposed in the sensor housing, the masking element being positioned adjacent to the radio frequency tag and at least one of the masking element and the radio frequency tag being movable between a first position, where the masking element covers a first portion of the radio frequency tag, and a second position, where the masking element covers a second portion of the radio frequency tag, the first portion being larger than the second portion. 14. The implantable sensor of claim 13, wherein the at least one of the masking element and the radio frequency tag is configured to rotate relative to the other one of the masking element and the radio frequency tag such that the first position is rotated from the second position. 15. The implantable sensor of claim 14, wherein the at least one of the masking element and the radio frequency tag is configured to rotate in a circular motion. 16. The implantable sensor of claim 13, wherein the masking element is in a first plane, and the radio frequency tag is in a second plane, the first plane being parallel to the second plane, and the masking element is moveable in the first plane relative to the radio frequency tag between the first and second positions. 17. The implantable sensor of claim 13, wherein the masking element is in a first plane, and the radio frequency tag is in a second plane, the first plane being parallel to the second plane, and the radio frequency tag is moveable in the second plane relative to the masking element between the first and second positions. 18. The implantable sensor of claim 13, wherein the masking element comprises a wedge formed at least in part of a conductive material and the masking element is configured to translate in relation to the flow rate of fluid through the sensor housing.
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