Vsm Technology Inc.

Simon Fraser University

Paul Richard Christensen

Yunquan Chen

Kevin Daryl Strange

Anton Bogdan Zorn

Mark Elliot Gelfer

David Sholom Waterman

Joaquin Andreas Hoffer

Apparatus for measuring a physiological parameter of a patient, such as blood pressure, takes a sequence consisting of a predetermined number of individual measurements. The apparatus computes a best estimate of the physiological parameter from values obtained in two or more of the measurements. The apparatus automatically takes a sequence of measurements and then stops. The apparatus can operate unattended so that it is not necessary for a physician or other health care worker to be present while measurements are being made. The use of the invention to measure blood pressure of a patient reduces the effect of &ldquo;white coat&rdquo; hypertension on the best estimate. Preferred embodiments of the apparatus ignore results of a first measurement in the sequence. The patient is already familiar with the apparatus when subsequent measurements are taken. This further reduces the possibility that the patient's reaction to the process of measurement will affect the results of the measurement.

Method and apparatus for measuring values of physiological parameters

A nerve cuff has one or more sets of electrodes for selectively recording electrical activity in a nerve or for selectively stimulating regions of the nerve. Each set of electrodes is located in a longitudinally extending chamber between a pair of longitudinal ridges which project into the bore of the nerve cuff. The ridges are electrically insulating and serve to improve the selectivity of the nerve cuff. The ridges seal against an outer surface of the nerve without penetrating the nerve. Nerve cuffs according to the invention may be used in functional electrical stimulation systems. Electrodes may be replaced with fine tubes to enable pharmacological agents to be delivered selectively through the tubes to portions of a nerve passing through the cuff or to permit the sampling of fluids from regions adjacent selected outer portions of the nerve. The nerve cuff may be constructed of modular segments which can be selected to provide a customized fit to the shape and size of a nerve at time of implantation.

Nerve cuff having one or more isolated chambers

Growing community of inventors

Burnaby, Canada

Paul Richard Christensen