Sensor for transcutaneous measurement of vascular access blood flow
First Claim
1. A sensor for the transcutaneous measurement of vascular access blood flow comprising at least one photoemitter and at least one photodetector, the total number of photoemitters and photodetectors being at least three, the photoemitters and the photodetectors being collinear and alternatingly arranged.
0 Assignments
0 Petitions
Accused Products
Abstract
An optical sensor includes photoemitter and photodetector elements at multiple spacings (d1, d2) for the purpose of measuring the bulk absorptivity (α) of an area immediately surrounding and including a hemodialysis access site, and the absorptivity (αo) of the tissue itself. At least one photoemitter element and at least one photodetector element are provided, the total number of photoemitter and photodetector elements being at least three. The photoemitter and photodetector elements are collinear and alternatingly arranged, thereby allowing the direct transcutaneous determination of vascular access blood flow.
-
Citations
7 Claims
-
1. A sensor for the transcutaneous measurement of vascular access blood flow comprising at least one photoemitter and at least one photodetector, the total number of photoemitters and photodetectors being at least three, the photoemitters and the photodetectors being collinear and alternatingly arranged.
-
2. A sensor for the transcutaneous measurement of vascular access blood flow comprising:
-
a substrate having an axis and an access placement line perpendicular to the axis;
an inboard emitter and an inboard detector positioned on the substrate on either side of and spaced the same distance δ
from the access placement line. - View Dependent Claims (3, 4, 5, 6, 7)
-
Specification