US Patent No: 6,017,493
Number of patents in Portfolio can not be more than 2000
Vacuum-assisted venous drainage reservoir for CPB systems
Stats
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Jan 25, 2000
Issued date -
Sep 26, 1997
filing date -
08/938,058
serial no -
In Force
status
Importance
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Abstract
A vacuum-assisted venous drainage reservoir for cardiopulmonary bypass surgery with both hard and soft shell reservoirs. The system utilizes a wall vacuum or other source of negative pressure to create a negative pressure via a regulator within a sealed hard shell reservoir, or within a sealed housing surrounding a soft shell reservoir. The addition of a negative pressure in the venous return line enables the use of smaller cannulas suitable for minimally invasive surgery. The reservoir need not be positioned well below the patient as in conventional gravity venous drainage configurations, thus adding flexibility to the operating room layout and enabling a reduction in the extracorporeal blood prime volume needed. In one embodiment, a flexible membrane in the hard shell reservoir expands to contact the blood surface and reduce blood/air interactions. In another embodiment, a moisture trap is provided between the source of vacuum and hard shell reservoir to reduce environmental contamination. A volume sensor for the hard shell reservoir may be used in a feedback loop for controlling the vacuum, circulation pump, or other device. A pressure relief valve may be included in both systems for safety, and a vacuum stabilizer reduces the severity of large changes in vacuum pressure. A piece of air-permeable material may form a portion of the soft shell reservoir to vent air from within.
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First Claim
Related Publications
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 4,734,269 Venous reservoir bag with integral high-efficiency bubble removal system | 106 | 1985 | |
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| 4,671,786 Overpressure safety valve | 23 | 1985 | |
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| 5,158,534 Automated gas delivery system for blood gas exchange devices | 30 | 1990 | |
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| 4,959,062 Integrated soft shell reservoir | 13 | 1989 | |
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| 5,303,585 Fluid volume sensor | 68 | 1991 | |
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| 5,823,986 Perfusion system | 75 | 1995 | |
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| 4,416,658 Blood suction device | 16 | 1981 | |
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| 5,039,482 Integrated unit for extracorporeal blood circuits | 47 | 1988 | |
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| 5,419,769 Suction systems | 36 | 1992 | |
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| 5,035,865 Vacuum blood sample collecting device | 33 | 1989 | |
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| 5,487,727 Method of implanting an intravascular membrane lung | 10 | 1994 | |
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| 5,281,112 Self regulating blood pump with controlled suction | 9 | 1992 | |
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| 4,828,543 Extracorporeal circulation apparatus | 166 | 1986 | |
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| 5,599,333 Suction adapter | 14 | 1994 | |
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| 5,275,585 Autotransfusion system with portable detachable vacuum source | 9 | 1992 | |
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| 4,205,677 Cardiotomy suction control system and valve | 22 | 1978 | |
| 4,490,331 Extracorporeal blood processing system | 67 | 1982 | |
| 4,402,687 Suction collection system | 42 | 1982 | |
| 4,599,093 Extracorporeal blood processing system | 25 | 1984 | |
| 4,964,849 Two-way suction apparatus for surgical procedures | 16 | 1986 | |
| 5,019,060 Drainage blood collection apparatus | 7 | 1989 | |
| 5,300,015 Blood conduit for pulsatile cardiopulmonary bypass pump | 11 | 1992 | |
| 5,305,982 Adjustable static pressure regulator | 13 | 1992 | |
| 5,336,051 Inline non-invasive pressure monitoring system for pumps | 35 | 1992 | |
| 5,586,085 Container and adaptor for use with fluid volume sensor | 63 | 1994 | |
| 5,571,081 Per-operational autotransfusion suction device | 14 | 1994 | |
| 5,423,780 Thorax drainage apparatus with variable vacuum control | 6 | 1994 | |