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Minimally invasive direct cardiac massage device and method
| Details |
Inventors: Fogarty, Thomas J.; Ryan, Timothy James;
Assignee: Fogarty; Thomas J. (Portola Valley, CA)
Primary Examiner: Rimell; Sam
Assistant Examiner:
Attorney, Agent or Firm: Crockett, Esq.; K. David Crockett & Crockett
A minimally invasive device for performing direct cardiac massage including an inflatable bladder mounted on a rigid inflation tube. The rigid inflation tube is used to push the bladder into the sternocostal space through an incision in the upper abdomen just below the xiphoid process. After insertion into the sternocostal space, the bladder is repeatedly inflated and deflated to massage the heart and provide blood flow. |
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DETAILED DESCRIPTION The cardiac pumping device and method presented below allows for direct cardiac massage in a procedure that can easily be accomplished by emergency medical personnel, paramedics, doctors and nurses, and probably by anyone trained in first aid.
The substernal cardiac pump includes an inflatable balloon mounted on a rigid tube.
The tube has inflation ports opening into the balloon, and a long handle section which is attached to an air pump.
The air pump is preferably a positive placement dual action pump, so that it pumps air into the balloon on the pumping stroke and sucks air out of the balloon during the reset stroke.
Thus the balloon can be repeatedly inflated and deflated.
When inflated, the balloon has a shape which accommodates the heart and squeezes the heart.
To use the cardiac pump on a cardiac arrest victim, the medic makes a small incision (two or three centimeter is sufficient) just below the sternum.
The incision is shallow, just enough to puncture the skin and any fat beneath the skin.
After making this initial incision, the medic sticks his finger through the incision, slides his finger along the under-surface of the sternum and pushes a hole up through the diaphragm of the victim.
This creates a channel into the thorax of the victim.
This is all the preparation that is needed for insertion of the cardiac pump.
With the channel easily made, the medic pushes the balloon through the channel, into the thorax, and in place over the heart.
The medic then operates the air pump to inflate and deflate the balloon repeatedly.
Every time the balloon is inflated, it expands between the sternum and the heart, and thus squeezes the heart.
Various additional features are added to make the cardiac pump easy to use.
The hand pump may be hooked up to a small electric motor, powered by battery, standard household current, or through an automobile cigarette lighter or other mobile power sources carried by ambulances.
A variety of other air pump mechanisms can be used.
The cardiac pump can be provided with over-pressure relief valves to limit the pressure within the balloon
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Heart Surgery 
