Closed-loop infusion system, both method and apparatus, based on real time urine measurement
US4291692A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 1979 |
| Grant date | Sep 29, 1981 |
| Priority date | — |
| Expiry date | Oct 9, 1999 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M5/1723
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A closed loop system for controlled infusion of fluids, medication or diagnostic substances into a patient based on real time measurement of urine output. Proper urine flow techniques and a self compensating drop count apparatus provide accurate representation as to cumulative number of drops and flow rate, with drop volume variations being compensated by a control algorithm which corrects computer parameters reflecting drop volume to correspond with urine volume measured. This real time urine flow rate is compared with a preset, desired flow rate to develop an error signal which is processed by a computer. Such processing includes modification by a PID control algorithm which governs infusion of fluids into the patient to effect the proper fluid resuscitation, medication or diagnostic treatment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.