INFLATABLE FINGER CUFF FOR USE IN NON-INVASIVE MONITORING OF INSTANEOUS BLOOD PRESSURE

摘要

An inflatable finger cuff for encircling the finger of a patient, to be used for non-invasive continuous monitoring of the instantaneous arterial blood pressure of the patient. Said finger cuff comprises a rigid cylinder, a compliant thin-walled tube insertable within the housing and forming an inflatable cylinder-like space therewith, said tube in use encircling said finger, the cylinder being pneumatically connectable to a fluid source, and an infrared light source and infrared light detector electrically connectable to an outside control circuit and being positioned in substance on both sides of the finger opposite each other. Said light source and light detector are located within said inflatable space between the rigid cylinder and the compliant tube, which is made of translucent material, are fastened to the inner wall of the compliant tube by an adhesive. A method of making an inflatable cuff adapted to encircle a finger of a patient, said method including the steps of providing a rigid conically shaped cylinder, having a first nozzle by way of a side connection for pressurization by a gas, a second nozzle by way of another side connection for passing electrical wires for the light elements, inserting a compliant thin-walled translucent tube, and soldering the light elements to the wires. Furthermore said method includes the step of fastening the light elements to the inner wall of the compliant tube by means of an adhesive, rolling the compliant tube back over the cylinder at the ends and fastening the tube to said ends to form a gastight seal.