Osmotic pressure sensing head

Details Osmotic pressure sensing head Osmotic pressure sensing head

1976-02-13

1977-06-14

Queisser, Richard C.

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Vapor pressure

G01N 1304

Patent

active

040289311

ABSTRACT:
An osmotic sensing head for measuring the osmotic pressure of protein molecules in blood, which is of the type that includes a reference chamber for holding saline solution, a sample chamber for holding blood, an osmotic membrane between the chambers, and a pressure sensor coupled to the reference chamber to measure the pressure therein. The sample chamber has a small volume and is provided with an inlet and outlet so that a storage saline solution can be removed and a blood sample introduced by merely flowing the blood sample in through the inlet while allowing the storage solution to pass out through the outlet. The inlet is directed at the membrane at an angle to help wash away material lying on the membrane. The osmotic membrane is held in slight tension by an elastomeric O-ring which presses the membrane against a conical surface.

REFERENCES:
patent: 3628373 (1971-12-01), Gilbert

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