Scott L. Kalpin,Lucien Bell Solefack,Keith A. Miesel
申请号：
US13169092
公开号：
US09044537B2
申请日:
2011.06.27
申请国别(地区):
US
年份:
2015
代理人:
摘要：
A method for determining status of an implanted catheter includes acquiring raw pressure data from a pressure sensor of in an implantable infusion device. The pressure sensor is in communication with a lumen of the catheter operably coupled to the infusion device. The catheter has a delivery region, in communication with the lumen, intended to be positioned in a fluid-filled target location of a patient. The method further includes filtering the raw pressure data to remove the DC component, leaving the AC component within a relevant physiological frequency range rectifying the AC component to produce a rectified pressure signal calculating a mean magnitude of the rectified signal and determining whether the mean magnitude is below a predetermined threshold. If the mean magnitude is below the threshold, the catheter is determined to be in a state other than a normal state.
