SOLEM, KRISTIAN,STEFANI, DAVID,HOBRO, STURE,OLDE, BO
申请号：
CA2933760
公开号：
CA2933760A1
申请日:
2014.12.09
申请国别(地区):
CA
年份:
2015
代理人:
摘要：
An apparatus (1) is described for extracorporeal blood treatment, comprising a treatment unit (2), an extracorporeal blood circuit (8) and a fluid evacuation line (10). A venous chamber (12) is placed in a blood return line (7) and isarranged in use to contain a gas in an upper portion (120) and blood at a predetermined level in a lower portion. The apparatus (1) comprises a control unit (21) connected to a first pressure sensor (14) and configured to: receive from the first pressure sensor (14) a first signal (P1(t)) relating to a time variable pressure (P(t)) of the blood flow； calculate a phase shift (?) between the first signal (P1(t)) and a reference signal (P2(t)) correlated to the time variable pressure (P(t)) detected at a location distinct from the upper portion (120) of the chamber (12)； monitorthe volume (V) of gas in the upper portion (120) of the chamber (12)through the phase shift (?).
