Heartsine Technologies Limited

Other

James Allen

John McCune Anderson

Johnny Houston Anderson

Allister Robert McIntyre

George John Dempsey

John Mccune Anderson

Allister R Mcintyre

A cardiopulmonary resuscitation (CPR) compression force indicator includes circuitry () for monitoring a patient's transthoracic impedance while the patient is being given CPR and generating a corresponding impedance signal, circuitry () for processing the impedance signal to provide an ongoing measurement of cardiac hemodynamic output, a microprocessor () for determining if the measurement falls outside pre-set limits, and indicator(s) () for indicating such determination externally to the person giving the CPR.

Cardiopulmonary resuscitation compression force indicator

A sealed medical electrode package comprises first and second electrodes each comprising a conductive layer () disposed on one major surface of a flexible nonconductive backing sheet (). The electrodes are disposed with their conductive layers () face-to-face and their backing sheets separably sealed together around their peripheral edges so that the backing sheets form a substantially gas-impermeable enclosure containing the conductive layers. In an alternative embodiment (FIG.) a respective electrical contact extends through each backing sheet into electrical contact with the respective conductive layer, and a substantially gas-impermeable packaging material encloses the electrodes. The packaging material has a respective aperture exposing each electrical contact, the periphery of each aperture being sealed to the backing sheet around the respective contact.

Sealed medical electrode package

A defribrillator comprises first and second electrodes (A, B) for application to a patient, a voltage source (), and an output circuit for connecting the voltage source across the electrodes upon the occurrence of a control signal (). The output circuit includes a first current path connecting one side of the voltage source to the first electrode (A) and a second current path connecting the other side of the voltage source to the second electrode (B). Each of the current paths contains at least one solid state switching device USD(bo) or IGBTThe switching device(s) USD(bo) in at least one of the current paths has no external control and characteristics similar to a Shockley diode.

Defibrillator with uncontrolled solid state switching

An apparatus for determining when a patient is susceptible to defibrillation comprises a plurality of electrodes () for obtaining an ECG signal from a patient, and data processing means () for determining a region of the ECG signal where the signal passes from a first threshold to a second threshold at least equal in magnitude but of opposite polarity to the first threshold while the gradient of the signal remains within certain limits, detecting the next following ECG signal peak, and providing an output signal upon such detection.

Apparatus for determining when a patient is susceptible to defibrillation

An apparatus for body surface mapping comprises a plurality of electrodes for attachment to spatially separate locations on a human torso with each electrode capable of detecting the electrical activity associated with a heartbeat and producing a corresponding voltage. The electrodes are sampled at a rate of 1 KHz during a cardiac cycle and sets of sampled values are produced and stored. Positional variations of the maximum and minimum sampled values over time are displayed as a projection of trajectories of the maximum and minimum sampled values in a three dimensional (x, y, t) space onto planes perpendicular to a plane containing the electrodes.

Apparatus for body surface mapping

A sensor device for monitoring bioelectric data from the thoracic region of a human body and/or for inducing stimulating signals to said region comprises a plurality of finger-like substrate portions of a flexible dielectric material. The substrate portions are releasably attachable to the thoracic region of a human body and the lateral spacing between the substrate portions is adjustable in accordance with the physiology of the body. A plurality of electrodes are provided on each substrate portion each having a respective lead connectable to an apparatus for inducing stimulating signals to, and/or receiving physiological signals from the electrodes. Indicia or other positioning elements are provided on at least one substrate portion for indicating the correct position of the assembly in use.

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Ballyclare, United Kingdom

James Allen