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US 8,408,204 B2Granted
Positive pressure systems and methods for increasing blood pressure and circulation
AssigneeAdvanced Circulatory Systems, Inc.
InventorKeith G. Lurie
Life of this patent
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Abstract
In one embodiment, the invention provides a medical method for treating a person and comprises repeatedly compressing the person's chest. While repeatedly compressing the person's chest, the method further includes repeatedly delivering a positive pressure breath to the person and extracting respiratory gases from the person's airway using a vacuum following the positive pressure breath to create an intrathoracic vacuum to lower pressures in the thorax and to enhance blood flow back to the heart.
Claims15
A medical method for treating a person, the method comprising:
- interfacing a threshold valve with the person's airway, wherein the threshold valve is configured to open when the person's negative intrathoracic pressure acting upon the threshold valve reaches about −3 cm H2O to about −20 cm H2O to permit respiratory gases to flow into the person's airway, wherein the negative intrathoracic pressure acting on the threshold valve directly causes the threshold valve to automatically open;
- repetitively compressing the person's chest to provide a compression phase where the chest is compressed and a decompression phase where the chest is actively lifted using an active chest compression/decompression device;
- while repeatedly compressing and lifting the person's chest, preventing respiratory gases from entering the person's airway when a vacuum is generated by actively lifting the chest with the active chest compression/decompression device while the threshold valve is interfaced with the person's airway to create an intrathoracic vacuum to lower pressures in the thorax;
- wherein the level of the negative intrathoracic pressure is repetitively lowered over at least two successive chest decompressions, and wherein use of the active chest compression/decompression device and the threshold valve generates an intrathoracic pressure that rapidly decreases as the person's chest is actively lifted;
- and
- while compressing and lifting the person's chest, when the person's negative intrathoracic pressure reaches about −3 cm H2O to about −20 cm H2O, the threshold valve automatically opens to permit respiratory gases to enter the lungs.
3 more elements
A medical method for treating a person, the method comprising:
- interfacing a threshold valve with the person's airway, wherein the threshold valve is configured to automatically open when the person's negative intrathoracic pressure acting on the threshold valve reaches about −3 cm H2O to about −20 cm H2O to permit respiratory gases to flow into the person's airway, wherein the negative intrathoracic pressure acting on the threshold valve directly causes the threshold valve to automatically open;
- repetitively compressing the person's chest to provide a compression phase where the chest is compressed and a decompression phase where the chest is actively lifted using an active chest compression/decompression device;
- while repeatedly compressing and lifting the person's chest, preventing respiratory gases from entering the person's airway when a vacuum is generated when actively lifting the chest with the active chest compression/decompression device while the threshold valve is interfaced with the person's airway to create an intrathoracic vacuum to lower pressures in the thorax;
- wherein the level of the negative intrathoracic pressure is repetitively lowered over at least two successive chest decompressions;
- and
- while compressing and lifting the person's chest, when the person's negative intrathoracic pressure reaches about −3 cm H2O to about −20 cm H2O, the threshold valve automatically opens to permit respiratory gases to enter the lungs.
3 more elements
A medical method for treating a person, the method comprising:
- interfacing a threshold valve with the person's airway, wherein the threshold valve is configured to automatically open when the person's negative intrathoracic pressure reaches about −3 cm H2O to about −20 cm H2O to permit respiratory gases to flow into the person's airway, wherein the negative intrathoracic pressure acting on the threshold valve directly causes the threshold valve to automatically open;
- repetitively compressing the person's chest to provide a compression phase where the chest is compressed and a decompression phase where the chest is actively lifted using an active chest compression/decompression device;
- while repeatedly compressing and lifting the person's chest, preventing respiratory gases from entering the person's airway when a vacuum is generated by actively lifting the chest with the active chest compression/decompression device while the threshold valve is interfaced with the person's airway to create an intrathoracic vacuum to lower pressures in the thorax;
- wherein use of the active chest compression/decompression device and the threshold valve generates an intrathoracic pressure that rapidly decreases as the person's chest is actively lifted;
- and
- while compressing and lifting the person's chest, when the person's negative intrathoracic pressure reaches about −3 cm H2O to about −20 cm H2O, the threshold valve automatically opens to permit respiratory gases to enter the lungs.
3 more elements
Dependencies are inferred from the claim text.