DRIVING CONTROL OF A RECIPROCATING CPR APPARATUS
First Claim
1. A method of sensing the Compression Depth and/or a compression depth in a reciprocating apparatus for cardio-pulmonary resuscitation (CPR) driven by a compressed gas and comprising a reciprocating part and a non-reciprocating part, the method comprising arranging a sensor mounted on the non-reciprocating part capable of sensing a signal emanating from the reciprocating part at a selected position thereof, transmitting the signal to a microprocessor unit that records its arrival time.
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Accused Products
Abstract
A method of controlling the amount of compressed gas used for driving a reciprocating apparatus for cardio-pulmonary resuscitation (CPR) comprising a valve means for controlling the provision of driving gas comprises operation of the valve means during the compression phase to stop provision of driving gas, which operation is separated in time from the venting of the driving gas from the apparatus at the end of the compression phase. Also disclosed are; a CPR apparatus operated by the method; a method of compression depth sensing.
57 Citations
32 Claims
- 1. A method of sensing the Compression Depth and/or a compression depth in a reciprocating apparatus for cardio-pulmonary resuscitation (CPR) driven by a compressed gas and comprising a reciprocating part and a non-reciprocating part, the method comprising arranging a sensor mounted on the non-reciprocating part capable of sensing a signal emanating from the reciprocating part at a selected position thereof, transmitting the signal to a microprocessor unit that records its arrival time.
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8. A method of controlling the amount of compressed gas used for driving a reciprocating apparatus for cardio-pulmonary resuscitation (CPR) comprising a valve means for controlling the provision of driving gas to a reciprocating part of the apparatus and for venting of the used driving gas from the apparatus, comprising
(a) operating the valve means at the start of a compression/decompression cycle to provide driving gas; -
(b) operating the valve means during the compression phase to stop the provision of driving gas; (c) operating the valve means at the end of the compression phase to vent the driving gas from the apparatus. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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- 21. A reciprocating apparatus for cardiopulmonary resuscitation (CPR) driven by a compressed gas, comprising a housing, a piston displaceable in the housing defining an upper chamber and a lower chamber, a valve controlling the supply of driving gas to the upper chamber during a reciprocating cycle, wherein the closure of the valve is controlled by a microprocessor based on the time at which the piston reached a selected position, in particular its lower extreme position, in an earlier cycle stored in a memory of the microprocessor.
Specification