Method and system for measuring chest parameters, particularly during cpr

A technology of measurement unit and energy storage device, which can be used in electrotherapy, therapy, physical therapy, etc., and can solve problems such as reducing measurement accuracy

CN102548519BInactive Publication Date: 2016-01-20LAERDAL MEDICAL AS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2016-01-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

This invention relates to a system for monitoring the position of a measuring unit when placed on a person, especially on the chest of a person, the system comprising a drive unit generating a magnetic field oscillating at a predetermined frequency adapted to be positioned on the opposite side of the person, e.g. chest to back dimensions, and the measuring unit being adapted to measure the magnetic field strength, the system including calculating means for calculating the distance between the measuring unit and the drive unit.
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Description

technical field

[0001] The method relates to a method and system for monitoring the position of a measurement unit when placed on a human body, especially as part of a CPR measurement. Background technique

[0002] The quality of cardiopulmonary resuscitation (CPR), defined as chest compressions and airflow, is important for the outcome of cardiac arrest. Gallagher, VanHoeyweghen and Wik (Gallagher et al; 1995 Dec 27 JAMA; 274(24):1922-5. VanHoeyweghen et al; 1993 Aug Resuscitation; 26(1):47-52. WikL et al. 1994 Resuscitation (Resuscitation; 28:195-203) separately pointed out that high-quality CPR performed by others before the arrival of ambulance personnel can improve the chance of survival by 3-4 times. But unfortunately, according to a recent research report published in JAMA (Wik et al., Quality of Cardiopulmonary Resuscitation During Out-of-Hospital Cardiac Arrest (Quality of Cardiopulmonary Resuscitation During Out-of-Hospital Cardiac Arrest) published in Jama2005-Vo...

Examples

Embodiment Construction

[0014] exist Figure 1a In the shown embodiment of the invention, the measurement unit 1 is placed at a distance above the drive unit 2 . The drive unit comprises a first drive coil 3 coupled to a power supply (not shown) to generate a magnetic field having a known magnetic field strength 6 varying with a known amplitude with a predetermined frequency or within a predetermined frequency range. The resulting magnetic field strength 6 will be determined by the distance from the drive unit 2 and the position relative to the magnetic field axis 7 . As long as the measuring unit 1 is close to the field axis 7 , the magnetic field strength 6 depends in a predictable manner on the distance from the drive unit, the properties of which are well known for the magnetic field generated by the coil 3 .

[0015] Since the system is used on a patient, the frequency range of the variable magnetic field should preferably be in a range such that water in the patient's body does not significantl...