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US 8,527,043 B2Granted
Systems and methods for enhanced venous return flow during cardiac event
AssigneeZOLL Medical Corporation
InventorsMichael R. Dupelle, Sheldon S. White
Life of this patent
Estimating the term…
Abstract
Systems and methods of enhancing cardiopulmonary circulation in a subject during resuscitation are provided. A signal is received responsive to an induced heart compression that is applied to the subject, for example during ventricular fibrillation, an asystolic condition, or cardiac arrest. Responsive to receipt of the signal, a muscle distal subject's heart is electrically stimulated to contract and expel blood into the venous blood flow toward a heart of the subject.
Claims30
A stimulation device to enhance cardiopulmonary circulation, comprising:
- a stimulation electrode configured for placement onto a limb of the subject;
- and
- a controller, communicatively coupled with the stimulation electrode, the controller being configured to receive a signal indicative of an induced heart compression applied to a heart of the subject, and responsive to receipt of the signal, to direct the stimulation electrode to induce contraction of a muscle in the limb of the subject to force blood from the muscle and into a venous blood flow toward the heart in the absence of an inflatable therapeutic device.
A stimulation device to enhance cardiopulmonary circulation, comprising:
- a stimulation electrode configured for placement onto a limb of the subject;
- and a controller, communicatively coupled with the stimulation electrode, the controller being configured to receive a signal indicative of an induced heart compression applied to a heart of the subject, and responsive to receipt of the signal, to direct the stimulation electrode to induce contraction of a muscle in the limb of the subject to force blood from the muscle and into a venous blood flow toward the heart, wherein the controller is further configured to determine an amount of blood present in the muscle and to direct the stimulation electrode to induce contraction of the muscle when the amount of blood present in the muscle is at least a threshold amount of blood.
A stimulation device to enhance cardiopulmonary circulation, comprising:
- a stimulation electrode configured for placement onto a limb of the subject;
- and a controller, communicatively coupled with the stimulation electrode, the controller being configured to receive a signal indicative of an induced heart compression applied to a heart of the subject, and responsive to receipt of the signal, to direct the stimulation electrode to induce contraction of a muscle in the limb of the subject to force blood from the muscle and into a venous blood flow toward the heart, wherein the controller is further configured to receive the signal at a rate of 70 to 110 times per minute and to direct the stimulation electrode to induce contraction of the muscle at a rate of one to five times per minute.
A method of enhancing cardiopulmonary circulation in a subject, comprising acts of:
- receiving a signal responsive to an induced heart compression applied to the subject;
- and
- electrically stimulating, responsive to receipt of the signal, a muscle that is located distal to a chest cavity and abdomen of the subject to contract and increase venous blood flow toward a heart of the subject in the absence of an inflatable therapeutic device.
A method of enhancing cardiopulmonary circulation in a subject, comprising acts of:
- receiving a signal responsive to an induced heart compression applied to the subject;
- electrically stimulating, responsive to receipt of the signal, a muscle that is located distal to a chest cavity and abdomen of the subject to contract and increase venous blood flow toward a heart of the subject;
- and
- determining whether the muscle is engorged with a threshold amount of blood;
- wherein the act of electrically stimulating includes electrically stimulating the muscle in response to a determination that the muscle is engorged with the threshold amount of blood.
2 more elements
A method of enhancing cardiopulmonary circulation in a subject, comprising acts of:
- receiving a signal responsive to an induced heart compression applied to the subject;
- electrically stimulating, responsive to receipt of the signal, a muscle that is located distal to a chest cavity and abdomen of the subject to contract and increase venous blood flow toward a heart of the subject;
- inducing the induced heart compression responsive to a prompt received from a cardiopulmonary resuscitation feedback device;
- wherein the act of receiving the signal includes receiving, from the cardiopulmonary resuscitation feedback device, the signal identifying at least one of a rate of chest compression and a depth of chest compression;
- and
- wherein the act of electrically stimulating includes synchronizing the act of electrically stimulating the muscle with the signal identifying the at least one of the rate of chest compression and the depth of chest compression.
3 more elements
A method of facilitating care of a subject, comprising:
- providing a stimulation device to enhance cardiopulmonary circulation in a subject in the absence of an inflatable therapeutic device, the stimulation device including a stimulation electrode configured for placement onto a limb of the subject and a controller communicatively coupled to the stimulation electrode, the controller being configured to receive a signal indicative of an induced heart compression applied to a heart of the subject, and responsive to receipt of the signal, to direct the stimulation electrode to induce contraction of a muscle in the limb of the subject to force blood from the muscle and into a venous blood flow toward the heart.
Dependencies are inferred from the claim text.