Method for determining a patient's blood sodium level and artificial kidney for the application thereof
US4923613A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 11, 1988 |
| Grant date | May 8, 1990 |
| Priority date | — |
| Expiry date | May 11, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/52
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method for determining the blood sodium level of a patient whose blood circulates through one compartment of an exchanger separated from a dialysis fluid by a semipermeable membrane, wherein the conductivity of the dialysis fluid of equilibrium with the plasma is determined by: changing in a selected manner the conductivity of the dialysis fluid at inflow the exchanger, measuring the conductivity of the dialysis fluid at outflow from the exchanger, determining a lag time t.sub.L of the change in conductivity of dialysis fluid between inflow to and outflow from the exchanger, and determining an equilibrium conductivity value of the dialysis fluid for which the conductivity at outflow from the exchanger at an instant t is equal to the conductivity at inflow at an instant t-t.sub.L. The invention also relates to an artificial kidney incorporating means for carrying out this method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.