Patent ID: 7637921

Claim:
A compression device adapted to be arranged at the body of a patient and for compressing a vessel, comprising a base plate, connected to two extensions which proceed outward from the base plate in opposite directions, each of the extensions having at an end away from the base plate a device configured to retain a belt to secure the compression device to a patient with the belt, a pressure device, and a compression member, which receives pressure from the pressure device, configured for compressive bearing against a puncture site of the patient, wherein the pressure device has at least a first portion having a first action constant and a second portion having a second action constant, the first portion and the second portion being two physically distinct portions of the pressure device, the second action constant being higher than the first action constant, wherein the pressure device is operatively connected between the base plate and the compression member and is characterized by a non-uniform overall action constant over the operating range of the pressure device, such that when a low compression pressure is applied, the pressure device exhibits a small action constant over a portion of the operating range of the pressure device, and when a high compression pressure is applied, the pressure device exhibits a large action constant over another portion of the operating range of the pressure device, wherein the pressure device does not include said device, of each extension, that is configured to retain the belt and does not include the belt, and wherein the pressure device comprises a mechanical pressure device and a pneumatic pressure device.