A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
A61B 19/00 (2006.01) A61M 1/36 (2006.01) A61M 1/16 (2006.01)
Patent
CA 2268519
Access recirculation in a shunt is determined quantitatively by a method in which a standard solution, such as saline, is injected into a patient's (200) bloodstream upstream of the shunt. At a point in the access line, a photometric measurement is conducted of the change in hematocrit (delta H) with respect to time. Electronic circuitry (150) receives signals from the detector (100), compares the integrated area of delta H with respect to time of the standard solution initially flowing through the access of the recirculated solution, and provides display of recirculation (152).
On évalue quantitativement la recirculation d'accès dans un pontage au moyen d'un procédé selon lequel on injecte à un patient une solution de référence, telle qu'une solution saline, qui se mêle à l'écoulement sanguin en amont du pontage. Au niveau d'un point de la ligne d'accès, on effectue une mesure photométrique de la variation temporelle de l'hématocrite (delta H). Un circuit électronique (150) reçoit des signaux du détecteur (100), compare l'aire d'intégration par rapport au temps du delta H de la solution de référence s'écoulant initialement à travers le pontage, à celle de la solution en recirculation, et produit un affichage de cette recirculation (152).
Miller David R.
Steuer Robert R.
In-Line Diagnostics Corporation
Ridout & Maybee Llp
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