System for collection of blood without damage
AssigneeHarvest Technologies Corporation
InventorsWesley H. Verkaart, James R. Ellsworth
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Abstract
A system for the collection of physiological fluids includes a vacuum source (14) that is controlled to provide low vacuum as a function of whether fluids are entering the system. The suction wand and associated tubing are made of thin flexible materials, and the pressures employed do little damage to the collected fluids.
Claims5
In a system for collecting physiological fluids of the type having a suction wand operatively connected to a source of reduced pressure by a tube, the method comprising the steps of:
- applying said reduced pressure to said tube,
- detecting when said fluids are present in said suction tube;
- maintaining said source of reduced pressure at a first pressure when said fluids are not present in said suction wand in such a manner that air is drawn into said suction wand at a first rate;
- and
- maintaining said source of reduced pressure at a second pressure when said fluids are present in said suction wand in such a manner that said fluids are drawn into said suction wand at a flow rate that is less than said first rate.
In a system for collecting physiological fluids of the type having a suction wand operatively connected to a source of reduced pressure, the method comprising the steps of:
- detecting when said fluids are present in said suction wand;
- maintaining said source of reduced pressure at a first pressure when said fluids are not present in said suction wand;
- and
- maintaining said source of reduced pressure at a second pressure when said fluids are present in said suction wand, wherein said first pressure is in the range of from about −20 mm Hg to about −10 mm Hg and said second pressure is in the range of from about −150 mm Hg to about −100 mm Hg.
Dependencies are inferred from the claim text.