Physiologic fluid pressure sensing head

Claim 1

A PRESSURE SENSING HEAD FOR THE MEASUREMENT OF PHYSIOLOGIC FLUID PRESSURE EXISTING BEHIND AN ELASTIC BODY MEMBRANE COMPRISING, IN COMBINATION, A RIGID APERTURED ELASTIC BODY MEMBRANE DEPRESSOR ELEMENT PROVIDED WITH AN ELASTIC BODY MEMBRANE-DEPRESSING FACE HAVING A SURFACE GENERALLY CONFORMING TO THAT OF THE UNDEPRESSED FLESH TO WHICH SAID DEPRESSOR ELEMENT IS TO BE APPLIED, AND A GAS PRESSURE DEVELOPMENT NOZZLE FIXEDLY MOUNTED WITH RESPECT TO SAID DEPRESSOR ELEMENT WITH DISCHARGE OPENING DISPOSED ON THE REAR SIDE OF SAID DEPRESSOR ELEMENT FROM SAID ELASTIC BODY MEMBRANE-DEPRESSING FACE IN A LOCATION PRESERVING THROTTLED GAS FLOW OUT OF SAID DISCHARGE OPENING RESPONSIVE TO SAID PHYSIOLOGIC FLUID PRESSURE BUT CLEAR OF CONTACT WITH SAID ELASTIC BODY MEMBRANE AND ANY FLESH OVERLYING SAID ELASTIC BODY MEMBRANE AS WELL AS ANY ELASTOMERIC DIAPHRAGM CLOSING OFF THE APERTURE IN SAID DEPRESSOR ELEMENT AND ANY FREELY MOVABLE RIGID STRUCTURE INTERPOSED BETWEEN SAID DISCHARGE OPENING AND SAID ELASTIC BODY MEMBRANE TOGETHER WITH ANY SAID FLESH OVERLYING SAID ELASTIC BODY MEMBRANE DURING THE TIME SAID DEPRESSOR ELEMENT IS MADE TO DEPRESS SAID ELASTIC BODY MEMBRANE WITHOUT OCCLUSION OF PASSAGE OF PHYSIOLOGIC FLUID THEREPAST, SAID GAS PRESSURE DEVELOPMENT NOZZLE BEING PROVIDED WITH A FIRST PORT FOR INTRODUCTION THEREIN OF GAS UNDER PRESSURE AT SUBSTANTIALLY FIXED FLOW RATE AND A SECOND PORT FOR MEASUREMENT OF THE GAS PRESSURE DEVELOPED WITHIN SAID NOZZLE, WHEREUPON SAID GAS PRESSURE DEVELOPED WITHIN SAID NOZZLE IS A FUNCTION OF SAID PHYSIOLOGIC FLUID PRESSURE EXISTING BEHIND SAID ELASTIC BODY MEMBRANE.