Instrumentarium Corporation

B&ouml;rje Tor Rantala

Bo Holte

Richard G Fiddian-Greene

Joel C Kent

The invention concerns a system for the measurement of cardiac ( ) output. The system comprises a heating resistor ( ) placed in the vena cava ( ), a temperature sensor ( ) placed in the pulmonary trunk ( ), an isolation interface ( ) for separating an isolated side ( ) and a non-isolated side according to patient potential, a power source ( ) which is placed on the non-isolated side and produces the energy to be supplied to the heating resistor ( ), and measuring elements ( ) for the measurement of the power supplied to the heating resistor ). According to the invention, the power measuring ( ) elements are disposed on the isolated side ( ), allowing the effective power supplied to the heating resistor ( ) to be computed as accurately as possible.

System and method for the measurement of cardiac output

The invention concerns a system for ECG monitoring, comprising measuring electrodes R, F, L, N; V , V , V , V , V , V ) attached to a patient (P) in accordance with a standard electrode placement; signal leads ( ) connected to corresponding measuring electrodes (R, F, L, N; V , V , V , V , V , V ) each of said signal leads being provided with a first connector element ( ); a collecting connector ( ) containing second connector elements ( ) for receiving the first connector elements ( ); an ECG apparatus comprising an amplifier unit ( ) to which the measurement signals are passed from the collecting connector; and change-over switches ( ) which are so implemented that, in a first connection position (I), they will conduct the measurement signals from the measuring electrodes (R, F, L, N; V , V , V V , V , V ) attached to the patient (P) to the ECG apparatus so that the corresponding signal leads ( ) are connected to a patient, while in a second connection position (II) they establish a shielding ground connection for at least some of said signal leads.

System for ECG monitoring with selective lead switching

A method and arrangement in connection with a ventilator, in which fresh gas is supplied to a patient and part of the patient's breathing gas is supplied to the patient with a bellows means. To provide a basic solution suitable for a variety of uses fresh gas is supplied to the patient by means of a gas mixer. The fresh gas flow from the gas mixer is occasionally led to drive the bellows means.

Method and arrangement in connection with ventilator

An improved remote sensing tonometric catheter apparatus (,) and method for sampling of a fluid or gas property of interest in a hollow internal organ. The tonometric catheter (,) assists in early detection of the problems of stress ulceration and/or intestinal ischemia. The tonometric catheter (,) can be one or more sampling chambers (,) for introduction into an internal organ or area adjacent thereto. Preferably, the wall (,) of the sampling chamber (,) is freely permeable to the gas or fluid to be measured by the sensor (,), but is poorly permeable to other gases or fluids which may interfere with the sensor (,).

Growing community of inventors

Helsinki, Finland

Börje Tor Rantala

Growing community of inventors

Helsinki, Finland

B&ouml;rje Tor Rantala

Börje Tor Rantala