초록 ▼

An automatic control system and methods of automatic control for reducing the blood/air interface for suction from the left ventricle and/or operating field are provided by the present invention. A system in accord with the present invention will have a pressure sensor or monitor, a pump, and a bubb

An automatic control system and methods of automatic control for reducing the blood/air interface for suction from the left ventricle and/or operating field are provided by the present invention. A system in accord with the present invention will have a pressure sensor or monitor, a pump, and a bubble or air sensor to detect the ratio of air-to-blood in the sucker lines. The system will also have a processing means connected to the pressure sensor, pump, and air sensor for automatically adjusting the pump speed in response to the sensed pressure and/or the sensed air-to-blood ratio, and may have a display and the appropriate manual controls to manually adjust the pump speed also connected to the processing means. A method in accord with the present invention will provide for the sensing of the pressure and the air-to-blood to blood ratio and adjusting the pump speed in accord therewith so as to continuously maintain a suction level that will be adequate to remove the necessary and desired amount of blood without damage to surrounding tissue. In particular, the system will used sensed air-to-blood ratios to adjust the pump speed to desired levels so as to maintain a continuous suction at low pressure levels, varying the pump speed as needed to do so, as opposed to the single speed, high pressure provided by present day blood collection systems.

대표청구항 ▼

An automatic control system and methods of automatic control for reducing the blood/air interface for suction from the left ventricle and/or operating field are provided by the present invention. A system in accord with the present invention will have a pressure sensor or monitor, a pump, and a bubb

An automatic control system and methods of automatic control for reducing the blood/air interface for suction from the left ventricle and/or operating field are provided by the present invention. A system in accord with the present invention will have a pressure sensor or monitor, a pump, and a bubble or air sensor to detect the ratio of air-to-blood in the sucker lines. The system will also have a processing means connected to the pressure sensor, pump, and air sensor for automatically adjusting the pump speed in response to the sensed pressure and/or the sensed air-to-blood ratio, and may have a display and the appropriate manual controls to manually adjust the pump speed also connected to the processing means. A method in accord with the present invention will provide for the sensing of the pressure and the air-to-blood to blood ratio and adjusting the pump speed in accord therewith so as to continuously maintain a suction level that will be adequate to remove the necessary and desired amount of blood without damage to surrounding tissue. In particular, the system will used sensed air-to-blood ratios to adjust the pump speed to desired levels so as to maintain a continuous suction at low pressure levels, varying the pump speed as needed to do so, as opposed to the single speed, high pressure provided by present day blood collection systems. 48837, 19981200, Gustafson, 362/235; US-5898381, 19990400, Gartner et al., 340/815.65; US-5900850, 19990500, Bailey et al., 345/055; US-5929788, 19990700, Vukosie, 340/908.1; US-5931562, 19990800, Arato, 362/184; US-5932860, 19990800, Plesko, 235/454; US-5934694, 19990800, Schugt et al., 280/033.991; US-5975714, 19991100, Vetorino et al., 362/192; US-5990802, 19991100, Maskeny, 340/815.45; US-6009650, 20000100, Lamparter, 040/572; US-6018899, 20000200, Hanitz, 040/473; US-6028694, 20000200, Schmidt, 359/264; US-6095661, 20000800, Lebens et al., 362/184; US-6102696, 20000800, Osterwalder et al., 433/029; US-6118388, 20000900, Morrison, 340/908; US-6159005, 20001200, Herold et al., 433/029; US-6177678, 20010100, Brass et al., 250/461.1; US-6183100, 20010200, Suckow et al., 362/035