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MULTIPARAMETER PATIENT SIMULATOR TRANSIT TIME CONTROL

IP.com Disclosure Number: IPCOM000209427D
Publication Date: 2011-Aug-04
Document File: 4 page(s) / 123K

Publishing Venue

The IP.com Prior Art Database

Abstract

A multi-parameter patient simulator is disclosed which reflects SpO2 and cuff oscillation transit time during a simulation sequence at various conditions, such as, location of the SpO2 sensor, arterial compliance, and NIBP cuff pressure, among others. The patient simulator provides simulations with pulsatile signals based on definitions built into the simulator. These definitions include a relative transit time controlled by sensor locations, or by user settings, and by transit time curves based on other simulation values, for example, systolic / diastolic pressure.

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MULTIPARAMETER PATIENT SIMULATOR TRANSIT TIME CONTROL

FIELD OF INVENTION

The invention generally relates to patient simulators and more particularly to a multi- parameter patient simulator.

BACKGROUND OF THE INVENTION

Generally, patient simulators are used to test patient monitors. Patient simulators attempt to create human body signals under defined conditions, with multi-parameter simulators having a wide variety of simulation capabilities. A multi-parameter simulator provides simulations, such as electrocardiogram (ECG), respiration, blood pressure, temperature and cardiac output conditions, among others. With increasing patient monitor complexity related to non-invasive blood pressure measurements, patient simulators need to have synchronized parameters, typically, with regard to ECG, SpO2 and non-invasive blood pressure. Enhanced simulators are needed to create repeatable and reproducible measurements for patient monitor evaluation in a non-clinical environment for these new patient monitors.

A conventional technique involves use of a Pulse Oximeter Oxygen Saturation (SpO2) monitor to augment the process of measuring Non-Invasive Blood Pressure (NIBP). The SpO2 monitor signal is used to assist NIBP by confirming the presence of NIBP oscillations. The confirmation takes into account the expected time relationship between the NIBP oscillation and the SpO2 monitor. This time relationship is referred to as the transit time. The transit time between electrocardiogram (ECG) signals, cuff oscillations, and Pulse Oximeter Oxygen Saturation (SpO2) can vary based on sensor placement, medical conditions, patient type, for example, neonate or adult, and also during a non- invasive blood pressure (NIBP) determination. However, no patient simulators currently available possess the ability to simulate transit time behavior as related to the


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synchronization of ECG, SpO2 and NIBP parameters, especially with regard to NIBP oscillation and SpO2 pulse timing information.

Therefore, there is a need in the art for a patient simulator which has a controlled transit time during a simulation sequence at various conditions.

BRIEF DESCRIPTION OF THE INVENTION

A multi-parameter patient simulator is disclosed which reflects...