1
Allan P Bakke: Convection blood warming system with disposable flattened tube envelope having vent incorporating a hydrophobic filter. L Paul Burd, Richard O Bartz, Robert W Gutenkauf, May 30, 1995: US05420962 (113 worldwide citation)

A system for warming blood or other liquids to body temperature for infusion into a patient. The system includes a blood warmer apparatus having a pair of closely spaced apart heat transfer plates, each of which forms one face of a housing containing flat vapor condensation heating units. A flat dis ...


2
Allan P Bakke: Electric blood warmer utilizing metallic ribbon flow cartridge and low thermal mass heating units. Wayne O Hadland, July 11, 1989: US04847470 (95 worldwide citation)

An apparatus for warming blood from storage to physiologic temperatures at transfusion rates up to 160 milliliters per minute includes a flat metal cartridge formed by a pair of thin generally rectangular planar members spaced slightly apart in parallelism and sealed at their peripheral edges to def ...


3
Allan P Bakke: CONVECTION BLOOD WARMING SYSTEM WITH DISPOSABLE FLATTENED TUBE ENVELOPE INCORPORATING PAPERBOARD “NEEDLE” FOR INSERTING ENVELOPE BETWEEN HEATING PLATES AND EMPLOYING ACTIVE AND PASSIVE INSULATION OF OUTLET FLOW PATH TO PROVIDE NORMOTHERMIC FLUID AT ZERO TO 600 MILLILITERS PER MINUTE. August 19, 2003: US06608968 (43 worldwide citation)

A thin, flat paperboard inserter or “needle” which is longer than the blood warmer heating plates is attached to the edge of the flattened tube envelope to enter the very narrow gap between the heating plates. The inserter is fed between the heating plates and advanced to emerge from the other end o ...


4
Allan P Bakke: Electric blood warmer utilizing a metallic ribbon-flow cartridge. Wayne O Hadland, November 1, 1988: US04782212 (35 worldwide citation)

An apparatus for warming flowing blood from storage to physiologic temperatures at transfusion rates up to 160 milliliters per minute includes a flat metal cartridge formed by a pair of thin generally rectangular planar members spaced slightly apart in parallelism and sealed at their peripheral edge ...


5
Allan P Bakke: Electric blood warmer utilizing heating by condensation. May 7, 1991: US05013889 (33 worldwide citation)

An apparatus for warming refrigerated blood to physiologic temperature during transfusion at flow rates from zero to greater than 160 milliliters per minute. The apparatus consists primarily of two hollow metal rectangular box shaped heating units containing a water reservoir in equilibrium with a l ...


6
Allan P Bakke: Cylindrical electric liquid warming system utilizing heating by condensation. Burd Bartz & Gutenkauf, March 7, 2000: US06035102 (28 worldwide citation)

A system for warming blood or other liquids to body temperature and maintaining the liquid at that temperature for infusion into a patient. The system is characterized by a cylindrical condensation liquid heating chamber having an inner tubular air heater. A cylindrical heat retaining shell surround ...


7
Allan P Bakke: Light weight rigid flat heat pipe utilizing copper foil container laminated to heat treated aluminum plates for structural stability. January 20, 2004: US06679318 (16 worldwide citation)

A very thin flat plate shaped sintered copper powder wick with a waffle pattern on one surface is sealed between two sheets of thin copper foil. The interior space within the sealed foil is evacuated and charged with sufficient water to saturate the wick through a copper tube which is then hermetica ...


8
Allan P Bakke: Apparatus for thawing frozen biological fluids utilizing heating plates and oscillatory motion to enhance heat transfer by mixing. March 14, 2006: US07011797 (11 worldwide citation)

An improved dry heat method and apparatus for thawing frozen biological fluids utilizing electrically heated plates and oscillatory motion to enhance heat transfer by mixing as the fluid thaws. Bags of frozen fluid to be thawed are lightly squeezed between two heating plates, one of which is gently ...


9
Allan P Bakke: Disposable outlet patient flow line employing active warming and passive insulation to provide normothermic fluid at very low flow rates for in-line blood warmers. April 15, 2008: US07357786

A disposable outlet patient flow line for in-line blood/fluid warmer devices uses both passive insulation and active warming to deliver normothermic intravenous fluid to the patient connection site at very low flow rates. A co-extruded annular air space provides passive insulation which reduces heat ...


10
Allan P Bakke: Apparatus for thawing frozen biological fluids utilizing heating plates and oscillatory motion to enhance heat transfer by mixing. Allan P Bakke, December 30, 2004: US20040265168-A1

An improved dry heat method and apparatus for thawing frozen biological fluids utilizing electrically heated plates and oscillatory motion to enhance heat transfer by mixing as the fluid thaws. Bags of frozen fluid to be thawed are lightly squeezed between two heating plates, one of which is gently ...



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