Measurement of episcleral venous pressure.
Using materials available in any ophthalmology clinic, we constructed a useful and reliable instrument for measuring episcleral venous pressure. The instrument, a modification of the pressure chamber method of Seidel, utilizes a latex membrane and an air-filled chamber. These modifications facilitated ease of preparation for the measurement. Episcleral venous pressure in normal subjects was 9.0  +/- 1.6 mm Hg (mean +/- S.D.). Measurement of episcleral venous pressure facilitated diagnosis of diseases such as arteriovenous fistula and superior vena caval obstruction, which block drainage of venous blood from the orbit.
D000328:Adult; D001795:Blood Pressure Determination / Q000295:instrumentation*; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008365:Manometry / Q000295:instrumentation; D008567:Membranes, Artificial; D008875:Middle Aged; D012408:Rubber; D012590:Sclera / Q000098:blood supply*; D014690:Venous Pressure
D008567:Membranes, Artificial; D012408:Rubber