Hewlett-Packard Company

Wang Laboratories, Inc.

Robert J Snyder

Mark S Kotfila

Michael K Dempsey

A flexible patient monitoring system which interfaces a telemetry subsystem with a network by way of a telemetry transmission receiving system and a network controller. The telemetry subsystem includes one or more monitoring instruments, a multiport transmitter, a telemetry subsystem interface, a backchannel receiver module, and a telemetry docking station. The flexible patient monitoring system may be configured to operate in at least four modes: ambulatory telemetry mode, wherein the multiport transmitter is operated independently of other monitoring instruments and is powered by an internal power source; docked telemetry mode, wherein the multiport transmitter is connected to the telemetry docking station for transfer of data and power; simple instrument telemetry mode, wherein the multiport transmitter and a primary monitoring instrument or an auxiliary monitoring instrument are connected together for transfer of data; and docked instrument telemetry mode, wherein the multiport transmitter and a primary monitoring instrument or an auxiliary monitoring instrument are attached to the telemetry docking station for transfer of data (and optionally for transfer of power to the multiport transmitter). Wireless communications between the telemetry subsystem and various nodes on the network are thus enabled. Information may be provided to and from the telemetry subsystem interface via the multiport transmitter.

Flexible patient monitoring system featuring a multiport transmitter

A flexible patient monitoring system which interfaces a telemetry subsystem with a network by way of a telemetry transmission receiving system and a network controller. The telemetry subsystem includes one or more monitoring instruments, a multiport transmitter, a telemetry subsystem interface, a backchannel receiver module, and a telemetry docking station. The flexible patient monitoring system may be operated to implement network-based, system-originated control of one or more of the patient monitoring functions performed in the system. A particular function that is subject to dynamic control is the transmission of a telemetry signal.

Dynamic control of a patient monitoring system

A flexible patient monitoring system which interfaces a telemetry subsystem with a communications network by way of a telemetry transmission receiving system and a network controller. The telemetry subsystem includes one or more monitoring instruments, a multiport transmitter, a telemetry subsystem interface, a backchannel receiver module, and a telemetry docking station. Wireless communications between the telemetry subsystem and various nodes on the network are thus enabled. A backchannel communications link on a paging-based communications channel is provided to permit information to be transmitted from a node on the communications network to the multiport transmitter.

Paging-based backchannel in a medical telemetry system

A data signal is encoded as frequency modulation by selecting carrier sources of different phases in response to data signals and filtering the resultant wave to produce an output deviating from the carrier frequency for one signal time in response to a single shift of phase. A phasing switch stores a record of the last sent phase and a record of the parity value of the number of zeros sent. The selected phase is as last sent for a 0, advanced for a 1 when the zero parity is of one value, and retarded when the zero parity is of another value.

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Westford, MA, United States of America

Robert J Snyder