Wound drainage system with anti-spill device

摘要

In a wound drainage system, blood, water and other body fluids withdrawn from a patient enter a collection chamber (303) through a port (310). A conduit (323) for carrying collected fluids in excess of the capacity of the chamber (303) to a further collection chamber (305) extends from a wall (311) dividing the chambers (303,305) into the chamber (303). The lowermost entrance portion of the conduit (323) is arranged on an imaginary vertical line extending through the centre of gravity of the chamber (303); preferably at a distance d from the uppermost wall (317) defining the chamber (303) where d is given by the formula w/(2 tan ϑ), w being the distance between the closest [at the level of the lowermost entrance portion (333)] of the walls (309,311,319,321) defining the chamber (303) and 90-ϑ being the maximum angle of rotation about an axis perpendicular to the imaginary vertical axis before spillage occurs. This arrangement will minimise overspill, prior to full capacity caused by tilting the collection chamber (303).