Synchronizing Chest Compression and Ventilation in Cardiac Resuscitation

• US 20110224587A1
• Filed: 05/26/2011
• Published: 09/15/2011
• Est. Priority Date: 02/16/2006
• Status: Active Grant

• Current Assignee: Zoll Medical Corporation (Asahi Kasei Corporation)
• Original Assignee: Zoll Medical Corporation (Asahi Kasei Corporation)
• Inventors: Freeman, Gary A.
• Granted Patent: US 9,174,064 B2
• Time in Patent Office: Days
• US Class Current: 601/43
• CPC Class Codes: A61H 2201/0207 heated
• CPC Class Codes: A61H 2201/0214 cooled
• CPC Class Codes: A61H 2201/025 by direct air flow on the patient's body
• CPC Class Codes: A61H 2201/0257 by a heat accumulator, e.g. a sand or liquid reservoir
• CPC Class Codes: A61H 2201/0285 with Peltier elements
• CPC Class Codes: A61H 2201/10 with further special therapeutic means, e.g. electrotherapy, magneto therapy or radiation therapy, chromo therapy, infrared or ultraviolet therapy
• CPC Class Codes: A61H 2201/105 with means for delivering media, e.g. drugs or cosmetics
• CPC Class Codes: A61H 2201/107 Respiratory gas
• CPC Class Codes: A61H 2201/5007 computer controlled
• CPC Class Codes: A61H 2201/501 connected to external computer devices or networks
• CPC Class Codes: A61H 2201/5043 Displays
• CPC Class Codes: A61H 2201/5048 Audio interfaces, e.g. voice or music controlled
• CPC Class Codes: A61H 2201/5089 Gas sensors, e.g. for oxygen or CO2
• CPC Class Codes: A61H 2230/04 Heartbeat characteristics, e.g. E.G.C., blood pressure modulation
• CPC Class Codes: A61H 2230/08 Other bio-electrical signals
• CPC Class Codes: A61H 2230/205 partial CO2-value
• CPC Class Codes: A61H 2230/207 partial O2-value
• CPC Class Codes: A61H 31/004 Heart stimulation
• 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
• CPC Class Codes: A61M 16/0069 : the speed thereof being controlled by respiratory parameters, e.g. by inhalation
• CPC Class Codes: A61M 16/021 : operated by electrical means A61M16/202 – A61M16/205 take precedence
• CPC Class Codes: A61M 16/1075 : by influencing the temperature A61M16/1045 takes precedence
• CPC Class Codes: A61M 2205/3344 : Measuring or controlling pressure at the body treatment site
• CPC Class Codes: A61M 2205/50 : with microprocessors or computers
• CPC Class Codes: A61M 2230/04 : Heartbeat characteristics, e.g. ECG, blood pressure modulation
• CPC Class Codes: A61N 1/39044 : in combination with cardiopulmonary resuscitation [CPR] therapy
• CPC Class Codes: A61N 1/3987 : characterised by the timing or triggering of the shock
• CPC Class Codes: Y10S 601/08 : Artificial respiration with computer control

Abstract

Apparatus for automatic delivery of chest compressions and ventilation to a patient, the apparatus including: a chest compressing device configured to deliver compression phases during which pressure is applied to compress the chest and decompression phases during which approximately zero pressure is applied to the chest a ventilator configured to deliver positive, negative, or approximately zero pressure to the airway; control circuitry and processor, wherein the circuitry and processor are configured to cause the chest compressing device to repeatedly deliver a set containing a plurality of systolic flow cycles, each systolic flow cycle comprising a systolic decompression phase and a systolic compression phase, and at least one diastolic flow cycle interspersed between sets of systolic flow cycles, each diastolic flow cycle comprising a diastolic decompression phase and a diastolic compression phase, wherein the diastolic decompression phase is substantially longer than the systolic decompression phase.

Claims

1. Apparatus for automatic delivery of chest compressions and ventilation to a patient, the apparatus comprising:

a chest compressing device configured to deliver compression phases during which pressure is applied to compress the chest and decompression phases during which approximately zero pressure is applied to the chest;

a ventilator configured to deliver positive, negative, or approximately zero pressure to the airway;

control circuitry and processor, wherein the circuitry and processor are configured to cause the chest compressing device to repeatedly deliver systolic flow cycles, each systolic flow cycle comprising a systolic decompression phase and a systolic compression phase, and

wherein the control circuitry and processor are configured to cause the ventilator to deliver a ventilation pressure during the compression phase that increases from approximately zero pressure at the onset of the compression phase to approximately a maximum at or near the end of the compression phase.

2. The apparatus of claim 1 wherein the control circuitry and processor are configured to cause the ventilator to deliver a ventilation pressure that is negative at the onset of the decompression phase.