US 6,585,644 B2 · Ambulatory medical apparatus and method using a telemetry system with predefined reception listening periods

Abstract

An implanted medical device (e.g. infusion pump) and an external device communicate with one another via telemetry messages that are receivable only during windows or listening periods. Each listening period is open for a prescribed period of time and is spaced from successive listening periods by an interval. The prescribed period of time is typically kept small to minimize power consumption. To increase likelihood of successful communication, the window may be forced to an open state, by use of an attention signal, in anticipation of an incoming message. To further minimize power consumption, it is desirable to minimize use of extended attention signals, which is accomplished by the transmitter maintaining an estimate of listening period start times and attempting to send messages only during listening periods. In the communication device, the estimate is updated as a result of information obtained with the reception of each message from the medical device.

Claims16

Dependent claims

A medical system, comprising:

a) an ambulatory medical device (MD) comprising MD electronic control circuitry that further comprises at least one MD telemetry system and at least one MD processor that controls, at least in part, operation of the MD telemetry system and operation of the medical device, wherein the medical device is configured to provide a treatment to a body of a patient or to monitor a selected state of the body;
and
b) a communication device (CD) comprising CD electronic control circuitry that further comprises at least one CD telemetry system and at least one CD processor that controls, at least in part, operation of the CD telemetry system and operation of the communication device, wherein the CD telemetry system sends messages to or receives messages from the MD telemetry system,
wherein at least one of the communication device or the medical device sets a preamble length, for at least some messages, as a function of at least the difference between a present time and a time of a previous communication.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

09/768,203Filed 22 Jan 2001 · us provisional application

Priority

21 Jan 2000

Published

US 2003/0028184 A16 Feb 2003

Granted

1 Jul 2003

Term ends

Not estimatedThe source records don’t support an estimate.

Classification47 codes

A61M 5/172
Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters: electrical or electronic
A61B 5/0002
Measuring for diagnostic purposes ; Identification of persons: remote monitoring of patients using telemetry, e.g. transmission of vital signals…
A61B 5/14532
Measuring characteristics of blood in vivo, e.g. gas concentration or pH-value ; Measuring characteristics of body fluids or tissues, e.g.…: for…
A61B 5/6847
Specially adapted to be brought in contact with an internal body part, i.e. invasive: mounted on an invasive device

Ambulatory medical apparatus and method using a telemetry system with predefined reception listening periods

Life of this patent

Ambulatory medical apparatus and method using a telemetry system with predefined reception listening periods

Life of this patent

Abstract

Claims16