IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0849867
(2001-05-03)
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발명자
/ 주소 |
- Florio, Joseph J.
- Hauck, Gregory
- Bornzin, Gene A.
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출원인 / 주소 |
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인용정보 |
피인용 횟수 :
32 인용 특허 :
25 |
초록
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A pacemaker or other implantable cardiac stimulation device is configured with both a rate hysteresis mode and a vasovagal syncope prevention mode. Within the rate hysteresis mode, the pacemaker detects when the intrinsic heart rate of the patient is below an escape rate, then paces the heart at a B
A pacemaker or other implantable cardiac stimulation device is configured with both a rate hysteresis mode and a vasovagal syncope prevention mode. Within the rate hysteresis mode, the pacemaker detects when the intrinsic heart rate of the patient is below an escape rate, then paces the heart at a Base Rate until an intrinsic beat is detected. When programmed in the vasovagal syncope prevention mode, upon detecting the intrinsic rate falling below the Hysteresis Escape Rate, the pacemaker paces the heart at a Vasovagal Syncope Response Rate, which is considerably higher than the Base Rate. The pacemaker is preferably set to the syncope prevention mode for patients prone to recurrent vasovagal syncope. By pacing the heart at the higher Vasovagal Syncope Response Rate, the pacemaker thereby helps prevent a significant drop in blood pressure which might otherwise cause a loss of consciousness in the patient. System and method embodiments are described.
대표청구항
▼
A pacemaker or other implantable cardiac stimulation device is configured with both a rate hysteresis mode and a vasovagal syncope prevention mode. Within the rate hysteresis mode, the pacemaker detects when the intrinsic heart rate of the patient is below an escape rate, then paces the heart at a B
A pacemaker or other implantable cardiac stimulation device is configured with both a rate hysteresis mode and a vasovagal syncope prevention mode. Within the rate hysteresis mode, the pacemaker detects when the intrinsic heart rate of the patient is below an escape rate, then paces the heart at a Base Rate until an intrinsic beat is detected. When programmed in the vasovagal syncope prevention mode, upon detecting the intrinsic rate falling below the Hysteresis Escape Rate, the pacemaker paces the heart at a Vasovagal Syncope Response Rate, which is considerably higher than the Base Rate. The pacemaker is preferably set to the syncope prevention mode for patients prone to recurrent vasovagal syncope. By pacing the heart at the higher Vasovagal Syncope Response Rate, the pacemaker thereby helps prevent a significant drop in blood pressure which might otherwise cause a loss of consciousness in the patient. System and method embodiments are described. the y-th, wherein 1≤y≤Y, wavelength converter condenses incident light and converts the incident light into light having at least one wavelength and converts the light having at least one wavelength to be output in parallel. 7. The apparatus as claimed in claim 6, wherein the y-th wavelength converter comprises: a light condensing unit for condensing incident light and outputting the condensed light; an optical fiber for receiving the condensed light from the light condensing unit and outputting the light having at least one wavelength; and a second collimating unit for converting the light received from the optical fiber to be parallel and outputting the converted light. 8. The apparatus as claimed in claim 7, wherein the light condensing unit comprises a second condensing lens for condensing the incident light and outputting the condensed light to an incident surface of a core of the optical fiber. 9. The apparatus as claimed in claim 7, wherein the light condensing unit comprises tapered fiber for condensing the incident light and outputting the condensed light to an incident surface of a core of the optical fiber. 10. The apparatus as claimed in claim 9, wherein the tapered fiber is fusion-spliced to the optical fiber. 11. The apparatus as claimed in claim 7, wherein a core of the optical fiber is made of pure silica. 12. The apparatus as claimed in claim 7, wherein a core of the optical fiber is doped with GeO2. 13. The apparatus as claimed in claim 7, wherein a core of the optical fiber is doped with P2O5. 14. The apparatus as claimed in claim 7, wherein the optical fiber is a single mode optical fiber. 15. The apparatus as claimed in claim 7, wherein the optical fiber is a multi-mode optical fiber. 16. The apparatus as claimed in claim 7, wherein the optical fiber is a step-index optical fiber. 17. The apparatus as claimed in claim 7, wherein the optical fiber is a graded-index optical fiber. 18. The apparatus as claimed in claim 1, wherein the target material is selected from a group consisting of a living body, an organism and a sample cuvette. 19. The apparatus as claimed in claim 1, wherein the pumping light source is selected from a group consisting of a pulse laser and a continuous wave (CW) laser. 20. The apparatus as claimed in claim 19, wherein the pulse laser is one selected from the group consisting of a Nd:YAG laser, a Ho:YAG laser, a Tm:YAG laser, an optical parametric oscillation (OPO) laser, a solid-state laser, and an optical fiber laser. 21. The apparatus as claimed in claim 1, wherein the light intensity measuring unit comprises a near infrared light intensity measuring unit for measuring the intensity of light incident from the first collimating unit and the intensity of the reference light, by wavelengths. 22. The apparatus as claimed in claim 1, wherein the light intensity measuring unit comprises an array light intensity measuring unit for measuring the intensity of light incident from the first collimating unit and the intensity of the reference light, by wavelengths. 23. An apparatus for measuring a concentration of a component of a target material, the apparatus comprising: a pumping light source for emitting light having a single wavelength having peak power of at least a predetermined value; a second through 2V-th beam splitting units, wherein V is at least 2; a second through (V+1)-th wavelength conversion units; a total reflector; a reference light generator for converting a light beam generated by splitting performed in each of the (V+1)-th through the 2V-th beam splitting units to be parallel, dividing the parallel light by wavelengths, and outputting the result of the division as reference light; a first collimating unit for converting light transmitted through the target material to be parallel and outputting the parallel light; a light intensity measuring unit for measuring the intensity of light incident from the first collimating uni
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