Chest compression apparatus for cardiac arrest
First Claim
1. An apparatus for increasing blood flow in a patient, the apparatus comprising:
- (A) a base contoured to seat near a central region of a patient'"'"'s chest;
(B) an actuator;
(C) a substantially inelastic belt configured to wrap around said patient'"'"'s chest; and
(D) a force converter, mounted on said base, coupled to said actuator, and having two belt connectors coupled to opposite extremities of said belt, for converting a force applied to said actuator and directed toward said chest into belt tightening force resultants directed substantially tangentially to said chest to cause movement of said two belt connectors in directions to tighten said belt around said patient, said converter including a toothed surface, coupled to said actuator, and gears, coupled to said belt connectors and engaged with said toothed surface, said force applied to said actuator causing said toothed surface to move along said gears in a manner to move said two belt connectors in said directions to tighten said belt around said patient.
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Abstract
The invention is an apparatus for increasing intrathoracic pressure for resuscitating cardiac arrest patients. The apparatus comprises a flexible, substantially inelastic belt wrapped around the patient'"'"'s chest and attached to a force converter. The force converter converts a downwardly directed force into a chestward resultant, which depresses the sternum, and two belt tightening resultants. The force converter comprises a pair of arm assemblies, each having a pair of spaced arms, which are pivotably mounted to a base. The base is positioned near the patient'"'"'s sternum and the ends of the belt attach to one end of each arm assembly. The opposite, handle ends of the arm assemblies are depressed toward the chest causing tightening of the belt and compression of the chest cavity.
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Citations
11 Claims
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1. An apparatus for increasing blood flow in a patient, the apparatus comprising:
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(A) a base contoured to seat near a central region of a patient'"'"'s chest; (B) an actuator; (C) a substantially inelastic belt configured to wrap around said patient'"'"'s chest; and (D) a force converter, mounted on said base, coupled to said actuator, and having two belt connectors coupled to opposite extremities of said belt, for converting a force applied to said actuator and directed toward said chest into belt tightening force resultants directed substantially tangentially to said chest to cause movement of said two belt connectors in directions to tighten said belt around said patient, said converter including a toothed surface, coupled to said actuator, and gears, coupled to said belt connectors and engaged with said toothed surface, said force applied to said actuator causing said toothed surface to move along said gears in a manner to move said two belt connectors in said directions to tighten said belt around said patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification