Robert F Steg

6197009, Mar 6, 2001

Oct 28, 1999

9/429773

Robert Steg - Escondido CA

Jostra Bentley Inc - PR

A61M 100

604319

A design and method of operation are disclosed for a fluid control conduit of a blood reservoir. The venous blood inflow conduit includes a fluid control nozzle and a base. When assembled together, the nozzle and base form a trap feature which prevents reflux of air or other gas upwardly into the nozzle of the conduit. As a result, during use of the reservoir the conduit normally runs full of venous blood and turbulence of the blood is prevented. In addition, the conduit also functions to divert the downward flowing venous blood in the nozzle into the base at an optimum fluid velocity to overcome the buoyancy effect of air or gas bubbles within the blood.

45990930, Jul 8, 1986

Aug 2, 1984

6/636998

Robert F. Steg - Brighton MI

B01D 5322
A61M 103

55 16

A unitary system incorporates an upper reservoir container having a blood gas separator, a cardiotomy reservoir and a venous reservoir. The upper container is positioned directly above a lower mass transfer container coupled with the venous reservoir by means of a check valve and having a spirally wound flattened tubular transfer membrane. A vacuum is drawn upon an upper portion of the reservoir container which carries a blood gas separator into which aspirated wound site blood is drawn for filtering and collection of blood in the cardiotomy reservoir. The latter is automatically drained via a pressure responsive valve into a venous blood reservoir at the lower portion of the reservoir container and into which venous blood flows for mixing with the filtered cardiotomy blood. A bladder pump within the mass transfer container above the tubular membrane alternately increases and decreases pressure within the lower container to help draw venous blood from the venous reservoir and to force blood between adjacent windings of the tubular membrane and outwardly from the mass transfer container to an arterialized blood return. The tubular membrane itself is used as a heat exchanger to lower the blood temperature below body temperature and to raise it above body temperature by controlling temperature and increasing thermal conductivity of gaseous oxygen flowing through the tubular membrane and by causing the oxygen to flow at a very high velocity.

54114721, May 2, 1995

Jul 30, 1992

7/922566

Robert F. Steg - Escondido CA
Dean M. Peterson - Escondido CA
Dante S. Cusi - Mexico City, MX

Galen Medical, Inc. - Escondido CA

A61M 100

604 4

Recovery of blood from a wound site (12) during a surgical procedure is accomplished with low blood trauma that enables collection of increased amounts of blood having relatively little structural damage for return to the surgical patient. Blood trauma is decreased by accelerating liquid blood from the wound site to flow at a relatively low velocity with a relatively high negative gauge pressure and accelerating a mixture of blood and foam from the wound site to flow at a relatively high velocity and a relatively low negative gauge pressure. A suction wand is provided in which liquid blood (32) is separated from a mixture of blood and foam (16) at the wound site through the transport of the two separated fluids at the different velocities and negative gauge pressures. The wand includes an outer blood foam tube within which are three resiliently compressed, side-by-side tubes for handling liquid blood, rinse solution and anticoagulant. Low fluidic capacitance filter defoamer modules, having built-in diaphragm operated pumps, receive and filter recovered liquid blood and foam blood for transfer to separate storage bags.

63225468, Nov 27, 2001

Oct 28, 1999

9/429773

Robert Steg - Escondido CA

Jostra Bentley Inc. - PR

A61M 100

604319

A design and method of operation are disclosed for a fluid control conduit of a blood reservoir. The venous blood inflow conduit includes a fluid control nozzle and a base. When assembled together the nozzle and base form a trap feature which prevents reflux of air or other gas upwardly into the nozzle of the conduit. As a result, during use of the reservoir the conduit normally runs full of venous blood and turbulence of the blood is prevented. In addition, the conduit also functions to divert the downward flowing venous blood in the nozzle into the base at an optimum fluid velocity to overcome the buoyancy effect of air or gas bubbles within the blood.