Suction regulator and fluid drainage system

Abstract

A low cost suction regulator is disclosed in conjunction with a fluid drainage system that includes a suction chamber and a collection chamber. The suction regulator is comprised of an atmospheric chamber and a suction chamber separated by a divider. An opening in the divider has a variably biased closing member associated therewith for opening or closing the opening according to operator selected pressure differentials between the chambers. The closing member is movable along an axis that differs from the direction of airflow, thus eliminating the need for damping the forces applied to the closing member. The dividing means and its closing member will operate over the full range of angles from the vertical to horizontal axis. One embodiment of the drainage system further includes devices for measuring patient airflow, patient negativity and imposed suction. Measurement of these variables is effectively implemented with diaphragms or bellows having dials or other types of marker connected thereto such that movement of the diaphragm or bellows results in movement of the dial or marker to thereby indicate the value of the above noted variables.