US Patent No: 6,540,688
Number of patents in Portfolio can not be more than 2000
Method and system for assessing collateral blood flow to a tissue region of interest
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Apr 1, 2003
Issued date -
Oct 11, 2001
filing date -
09/976,636
serial no -
In Force
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Abstract
The present invention is directed to a method and system for use in assessing collateral blood flow to a tissue region of interest (ROI). The method includes the steps of obtaining a first pulsatility measurement and a second pulsatility measurement, wherein one of the pulsatility measurements is obtained with a plurality of arteries supplying blood to the tissue ROI and the other pulsatility measurement is obtained with at least a selected one of such arteries substantially occluded. The method further provides for use of the first and second pulsatility measurements to generate a collateral flow value useful to medical personnel as an objective measure in assessing collateral blood flow to a tissue ROI. The method may further include the step of obtaining a check pulsatility measurement after obtaining a first pulsatility measurement and prior to obtaining a second pulsatility measurement, wherein all of the plurality of the arteries are substantially occluded. The check procedure enhances the reliability of a second pulsatility measurement obtained when a selected one of the arteries is substantially occluded.
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First Claim
Related Publications
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 5,297,548 Arterial blood monitoring probe | 181 | 1993 | |
| 5,503,148 System for pulse oximetry SPO.sub.2 determination | 158 | 1994 | |
| 5,934,277 System for pulse oximetry SpO2 determination | 163 | 1995 | |
| 5,766,127 Method and apparatus for improved photoplethysmographic perfusion-index monitoring | 120 | 1996 | |
| 5,842,979 Method and apparatus for improved photoplethysmographic monitoring of oxyhemoglobin, deoxyhemoglobin, carboxyhemoglobin and methemoglobin | 114 | 1997 | |
| 5,891,024 Two stage calibration and analyte measurement scheme for spectrophotomeric analysis | 112 | 1997 | |
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| 5,810,734 Apparatus and method for measuring an induced perturbation to determine a physiological parameter | 183 | 1995 | |
| 5,833,618 Apparatus and method for measuring an induced perturbation to determine a physiological parameter | 191 | 1995 | |
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| 4,204,545 Limb blood flowmeter | 29 | 1978 | |
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| 5,715,826 Method and device for assessing the state of blood vessels | 19 | 1996 | |
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| 5,671,750 Peripheral blood-flow condition monitor | 39 | 1996 | |
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| 5,050,613 Method and apparatus for vascular testing | 36 | 1989 | |
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| 5,913,826 Wideband external pulse cardiac monitor | 42 | 1996 | |
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| 4,539,997 Method and device for controlling the cuff pressure in measuring the blood pressure in a finger by means of photo-electric plethysmograph | 35 | 1982 | |
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| 4,869,253 Method and apparatus for indicating perfusion and oxygen saturation trends in oximetry | 188 | 1986 | |
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| 5,862,805 Apparatus and method for measuring the variability of cardiovascular parameters | 28 | 1996 | |
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| 5,095,912 Arterial distensibility measuring apparatus | 11 | 1990 | |
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| 4,562,843 System for determining characteristics of blood flow | 99 | 1981 | |
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| 5,301,675 Apparatus for measuring blood flow velocity and blood flow volume in aortas | 16 | 1992 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Oct 1, 2014 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |