DRIVING CONTROL OF A RECIPROCATING CPR APPARATUS

• US 20120283608A1
• Filed: 07/13/2012
• Published: 11/08/2012
• Est. Priority Date: 01/18/2007
• Status: Active Grant

• Current Assignee: Physio-Control Incorporated (Stryker Corporation)
• Original Assignee: Physio-Control Incorporated (Stryker Corporation)
• Inventors: Nilsson, Anders, Sebelius, Peter
• Granted Patent: US 9,844,487 B2
• Time in Patent Office: Days
• US Class Current: 601/41
• CPC Class Codes: A61H 2201/1246 by piston-cylinder systems
• CPC Class Codes: A61H 2201/1664 linear
• CPC Class Codes: A61H 2201/5007 computer controlled
• CPC Class Codes: A61H 2201/5064 Position sensors
• CPC Class Codes: A61H 2201/5066 Limit switches
• CPC Class Codes: A61H 2201/5092 Optical sensor
• CPC Class Codes: A61H 31/006 Power driven
• CPC Class Codes: A61M 16/00 Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes stimulating the respiratory movement by mechanical, pneumatic or electrical means, iron lungs combined with gas breathing means A61H31/00

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.

Claims

1. A method of sensing the compression depth in a reciprocating apparatus for cardio-pulmonary resuscitation (CPR) driven by a compressed gas and having 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; and

transmitting the signal to a microprocessor unit that records its arrival time.

2. The method of claim 1, wherein the sensor is a contactless sensor.

3. The method of claim 2, wherein the sensor is an ultrasound sensor.

4. The method of claim 1, wherein the sensor is a contact sensor.

5. The method of claim 4, wherein the compression depth of the apparatus is kept constant by physical means, and wherein the contact sensor is activated at the moment when the reciprocating part reaches the compression depth.

6. The method of claim 1, further comprising:

creating an electrical signal in a swept sensor by sweeping one or more magnetic sensors mounted at the non-reciprocating part with a magnetic field emanating from a corresponding field mounted at or deflected or reflected by the reciprocating part.

7. The method of claim 1, further comprising:

creating an electrical signal in a swept sensor by sweeping one or more radiation sensors mounted at the non-reciprocating part with a radiation emanating from a corresponding radiation source mounted at or deflected or reflected by the reciprocating part.

8. The method of claim 7, wherein the radiation source is one emitting UV, visible or IR radiation.