Detecting needle entry into a port of an infusion device

摘要

Systems for detecting needle insertion into a port chamber of an implantable medical device include a pressure sensor. The system detects characteristic pressure profiles associated with needle insertion into the port chamber through a septum and may generate a sensory cue to a clinician that proper needle placement has been achieved. Methods for detecting needle insertion into a port chamber of an implantable medical device includes detecting characteristic pressure profiles associated with needle insertion into the port chamber through a septum.

主权项

1. An implantable infusion device comprising:
a housing; a port assembly defining a port chamber, the port assembly including a septum disposed across the chamber to fluidly seal the port chamber relative to an exterior of the housing, the port assembly being disposed in the housing such that the chamber is accessible by a needle inserted through the opening and the septum from the exterior of the housing; a pressure sensor in fluid communication with the port chamber; and, electronics disposed in the housing and operably coupled to the pressure sensor, the electronics including a computer readable medium containing instructions that when implemented determine whether a transient pressure increase associated with insertion of a needle into the port chamber, prior to dispensing fluid into the port chamber, is detected via the pressure sensor.