Patent ID: 8603050
Filing Date: 2013-12-10
Classification: A61M

Abstract:
1. A method for use with an implanted infusion device and syringe that is not part of the implanted infusion device, the implanted infusion device including an implanted reservoir refill port, an implanted reservoir connected to the implanted reservoir refill port, an implanted pump mechanism connected to the implanted reservoir, an implanted outlet port configured to have a catheter connected thereto, a fluid passage between the implanted pump mechanism and the implanted outlet port that connects the implanted pump mechanism to the implanted outlet port, an implanted side port connected to the fluid passage at a location between the implanted pump mechanism and the implanted outlet port, and a pressure sensor connected to the fluid passage at a location between the implanted pump mechanism and the implanted outlet port, and the syringe including a plunger and a hypodermic needle, the method comprising the steps of: sensing pressure in the fluid passage between the implanted pump mechanism and the implanted outlet port with the pressure sensor; and determining that the implanted side port has been accessed by the hypodermic needle based on a predetermined change in the pressure in the fluid passage between the implanted pump mechanism and the implanted outlet port sensed by the pressure sensor.