Surgery – Diagnostic testing
Patent
1998-07-02
2000-09-19
O'Connor, Cary
Surgery
Diagnostic testing
600532, A61B 500
Patent
active
061204412
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to an apparatus and a method for the quantitative analysis of sleep disturbances or disorders, in particular for the stationary and ambulant detection, recording and analysis of sleep-related respiratory disturbances, cardiac rhythm disturbances, myoclonia, variations in blood pressure, depth of sleep parameters, movement parameters and disturbance or disorder parameters.
BACKGROUND OF THE INVENTION
Due to the increasing number of people suffering from sleep disorders and the related overburdening of sleep laboratories dealing with these disorders, the examination and measurement of disturbances by means of mobile apparatuses has been shifted from the stationary sector to the ambulant sector. The patients are told how to deal with the sensors connected with these apparatuses and, after the measuring time, return the mobile recording apparatus to the doctor attending them; the doctor then analyzes the recorded measuring signals to subsequently make a diagnosis. This ambulant method is very inexpensive due to the high time requirements related with a measurement and, furthermore, the results are not influenced by performing the measurements in a surrounding which is strange for the patient.
Such a mobile recorder is described in EP-A-0 356 603. This recorder allows the recording of measuring signals by means of eight channels, their storage and subsequent analysis in a computer. In this connection, it is possible to program the recorder in different ways in order to reduce the number of measured data by a preselection and to limit the data to desired measuring data depending on the clinical picture or the purpose of the diagnosis. By this different programming, the measurement can be adapted to different frame conditions.
The measurement of different parameters for the detection of sleep disturbances is discussed in DE-A-41 38 702. The apparatus disclosed therein comprises sensors for detecting the heart potential, the respiratory and snoring sounds, the degree of oxygen saturation of the blood and the patient's body position. An analysis of the measured results allows the diagnosis of apnea. However, this analyzing apparatus is limited to only one application purpose, namely the detection of sleep disturbances (apnea) and, with the mentioned sensors, comprises analyzing instruments designed for this very purpose only. In particular, although sleep-related respiratory disturbances can be detected, the "side effects" related therewith, such as cardiac rhythm disturbances, cannot be detected.
With respect to the prior art, reference is also made to DE 92 04 190 U1, DE 32 48 222 A1, DE 39 21 784 A1, U.S. Pat. No. 3,734,086, DE 92 00 249 U1 and Kurz, Roland: "Medizinische MeBtechnik und Biosignalverarbeitung in der kardiologischen Diagnostik" [Medical Measuring Technique and Biosignal Processing in Cardiological Diagnostics], M.-G.-Schmitz-Verlag GieBen 1984, pages 122-129, ISBN 3-922 272-23-1.
BRIEF SUMMARY OF THE INVENTION
It is the object of the invention to provide an apparatus and a method for the quantitative analysis of sleep disturbances by means of which disturbances occurring during sleep can most exactly and completely be detected, so that in addition to the analysis of these disturbances also disturbances of other body functions resulting therefrom can be detected. In particular, the apparatus and method is meant for detecting sleep disturbances based on cardiac rhythm disturbances (so-called "apnea-associated cardiac rhythm disturbances"). These objects are achieved with the features of the claims.
In achieving these objects, the invention is based on the following basic idea.
For a quick and exact analysis of sleep disturbances and disturbances related therewith, it is very important which body signals are recorded and how many parameters are necessary for indicating the cause of the disturbances by a correlation or comparison of these signals. For this reason, in the present invention it is possible to measure the heart potential, the oxygen satu
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R. Kurz "Medizinische Messtechnik und Biosignalverarbeitung in der kardiologischen Diagnostik" pp 122-129 (1984).
Astoriao Michael
MAP Medizintechnik fur Arzt und Patient GmbH
O'Connor Cary
Rauchfuss George W.
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