SYSTEM AND METHOD FOR DETECTING OCCLUSION USING SENSOR OUTPUT

摘要

A method of detecting an occlusion for an infusion therapy including obtaining a baseline output from a flowrate sensor; filtering the baseline output to form a filtered baseline output; determining an upper threshold value and a lower threshold value from the filtered baseline output; monitoring a therapy output of the flowrate sensor during the infusion therapy; filtering the therapy output to produce a filtered therapy output; and comparing the filtered therapy output to (i) the lower threshold value to determine if an occlusion is present upstream of the flowrate sensor, and (ii) the upper threshold value to determine if an occlusion is present downstream from the flowrate sensor. 12/gn/q FLONFLUD THROU GH; INFUSiN YSTEM- RATE SENSOR.AS FLU0 FLOSS THRJG 212 SUCASVOLlSOR ELECTRrCCURREN) CAPTURE A D',ATA 8FETHAT 214 INCLUDES TlE OtfrPUT S'IGNAL AS A FUNCTON OF TiME. APPLY A4 IN E REJEC TION FILTER TO 216 THE DATAk SET APPLYY A ULWPA-S PEFOM PETRAAkAYSGS F0LTRE 2i8 DATA SET (EAPPLY FFT TO CC#RT RATA S T TO FREQUJENCY DOMAI CACULTE T HE S CGNAL S TRENG3TH OVER A RANE OFFEU YT;HAT22 CORRELATES TO THE PMRNG FREQUENCY EG.. INTEGRATE THE 224 POR i1ffPECTN TEFREQUENCY DOXMN FO THE FREQENCY RANGE AND COMPUTE THE ENERGY METHOD) 222 CMAE TE SS GNAL STRENGTH CME THE SG0A STRENGTH 4 l TO AN UPPER TOA LOWER THRESH)0D T;HRESHOLD0 SRNGTH NO TRNTH NO BELOW LVWR AKOV UPPER TRSHOLD? THRESHOLD7 ACT!-VATE ALARM N.DCAilG 228 CIAEAAR3DCTN ANOCCLiONUMPSTRFJ4M OF ANOCCLUSIONDUMSEAM r232 THE FLOW RATE SE NSOiR OF THE FLOWvRATE SENSOR