US Patent No: 5,158,534

Number of patents in Portfolio can not be more than 2000

Automated gas delivery system for blood gas exchange devices

Stats

ATTORNEY / AGENT: (SPONSORED)
 

Importance

Loading Importance Indicators... loading....

Abstract

A system for delivering oxygen to a gas permeable membrane oxygenator is disclosed. The system may include an integral source of gas under pressure and a source of vacuum. A first mass flow controller is connected to the source of gas upstream in the gas flow from the gas exchange device. A pressure valve is positioned in the gas flow between the first mass flow controller and the membrane oxygenator. An atmospheric vent is positioned between the pressure valve and the first mass flow controller. A second mass flow controller is positioned downstream from the gas exchange device and is connected to the source of vacuum. A central controller commands the pressure valve to maintain the pressure at the inlet of the gas exchange device at a subatmospheric pressure. The second mass flow controller is commanded to maintain a rate of flow which is desired through the gas exchange device. The first mass flow controller is commanded to maintain a rate of flow higher than the second mass flow controller to ensure that a sufficient flow of gas is available through the pressure valve and the gas exchange device. The excess gas is exhausted through the vent. The present invention ensures sufficient gas flow at the gas permeable membrane to provide transfer of gases with the blood. Also, the pressure of the gas within the membrane oxygenator is low enough that outgassing through the membrane of bubbles into the blood is avoided.

Loading the Abstract Image... loading....

First Claim

Related Publications

Loading Related Publications... loading....

Patent Owner(s)

Patent OwnerAddressTotal Patents
BIOSURFACE ENGINEERING TECHNOLOGIES, INC.ROCKVILLE, MD32
INNERDYNE, INC.SUNNYVALE, CA14

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Berry, Gaylord L Salt Lake City, UT 7 352
Shan, Yansong 42149 Hartford Dr., Canton, MI 48187 7 155

Cited Art

Patent Info (Count) # Cites Year
 
BIOSURFACE ENGINEERING TECHNOLOGIES, INC. (1)
4,850,958 Apparatus and method for extrapulmonary blood gas exchange 54 1988
 
DR. EDUARD FRESENIUS CHEMISCH-PHARMAZEUTISCHE INDUSTRIE KG, APPARATEBAU KG (1)
4,231,366 Blood flow monitoring and control apparatus 83 1977
 
HALLIBURTON ENERGY SERVICES, INC. (1)
2005/0183,502 Motion-responsive coupled masses 2005
 
INSTITUTE OF CRITICAL CARE MEDICINE (1)
4,638,811 Vascular interface 11 1980
 
MIDSIX CARDIOVASCULAR/PULMONARY, INC. (1)
4,583,969 Apparatus and method for in vivo extrapulmonary blood gas exchange 73 1984
 
MKS INSTRUMENTS, INC. (1)
4,464,932 Thermal mass flowmetering 27 1982
 
OMRON TATEISI ELECTRONICS CO. (1)
4,466,804 Extracorporeal circulation of blood 61 1981
 
RICHARD WOLF GMBH (1)
4,207,887 Gas insufflation apparatus 49 1978
 
TERASAKI, HIDENORI (1)
4,650,457 Apparatus for extracorporeal lung assist 17 1985
 
WEISS, PAUL I. (1)
4,828,543 Extracorporeal circulation apparatus 166 1986
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (4)
4,401,431 Blood pump and oxygenator monitor-controller and display device 46 1981
4,490,331 Extracorporeal blood processing system 67 1982
4,493,692 Blood gas concentration control apparatus and method 34 1982
4,661,092 Peritoneal artificial lung 15 1983

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
ZOLL CIRCULATION, INC. (19)
6,458,150 Method and apparatus for patient temperature control 30 1999
6,450,990 Catheter with multiple heating/cooling fibers employing fiber spreading features 24 1999
6,368,304 Central venous catheter with heat exchange membrane 68 1999
6,165,207 Method of selectively shaping hollow fibers of heat exchange catheter 87 1999
6,287,326 Catheter with coiled multi-lumen heat transfer extension 114 1999
6,419,643 Central venous catheter with heat exchange properties 52 1999
6,447,474 Automatic fever abatement system 27 1999
6,299,599 Dual balloon central venous line catheter temperature control system 111 1999
6,582,398 Method of managing patient temperature with a heat exchange catheter 16 2000
6,516,224 Method for treating cardiac arrest 14 2001
6,393,320 Method for treating cardiac arrest 63 2001
6,620,131 Dual balloon central venous line catheter temperature control system 13 2001
8,128,595 Method for a central venous line catheter having a temperature control system 0 2001
6,652,565 Central venous catheter with heat exchange properties 17 2001
6,716,236 Intravascular catheter with heat exchange element having inner inflation element and methods of use 13 2001
6,572,640 Method and apparatus for cardiopulmonary bypass patient temperature control 17 2001
6,589,271 Indwelling heat exchange catheter 27 2001
7,278,984 System and method for controlling rate of heat exchange with patient 3 2002
7,641,632 System and method for controlling rate of heat exchange with patient 0 2007
 
ADVANCED TECHNOLOGY MATERIALS, INC. (2)
6,302,139 Auto-switching gas delivery system utilizing sub-atmospheric pressure gas supply vessels 12 1999
6,581,623 Auto-switching gas delivery system utilizing sub-atmospheric pressure gas supply vessels 15 2000
 
EDWARDS LIFESCIENCES CORPORATION (2)
6,017,493 Vacuum-assisted venous drainage reservoir for CPB systems 54 1997
6,537,495 Vacuum-assisted venous drainage system with rigid housing and flexible reservoir 19 1999
 
FRANCO, KENNETH L. (2)
6,936,222 Methods, apparatuses, and applications for compliant membrane blood gas exchangers 0 2002
8,409,502 Methods, apparatuses, and applications for compliant membrane blood gas exchangers 0 2005
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (2)
6,155,289 Method of and system for sub-atmospheric gas delivery with backflow control 27 1999
6,253,783 Method for sub-atmospheric gas delivery with backflow control 9 2000
 
PINPOINT MEDICAL, LLC (1)
7,541,000 Micro-processor controlled active gas removal apparatus 4 2005
 
TOKYO ELECTRON LIMITED (1)
7,563,328 Method and apparatus for gas injection system with minimum particulate contamination 0 2002
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (1)
5,591,399 System for diagnosing oxygenator failure 13 1995