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A New Minimized Perfusion Circuit Provides Highly Effective Ultrasound Controlled Deairing
Author(s) -
Kutschka Ingo,
Schönrock Uwe,
Essawi Aschraf El,
Pahari Dipak,
Anssar Marcel,
Harringer Wolfgang
Publication year - 2007
Publication title -
artificial organs
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.684
H-Index - 76
eISSN - 1525-1594
pISSN - 0160-564X
DOI - 10.1111/j.1525-1594.2007.00367.x
Subject(s) - perfusion , ultrasound , biomedical engineering , computer science , medicine , cardiology , radiology
Minimized perfusion circuits (MPCs) have been criticized for insufficient air elimination. The deairing capabilities of a new MPC, including an ultrasound controlled deairing unit, were compared to a standard extracorporeal circuit (ECC) in a laboratory setup. During blood flow of 4.0l/min, we injected 30‐cc air over a period of 30 s into the venous line of both systems ( n = 10 measurements/15‐min intervals). Air was detected during the first 2 min post injection using a dual‐channel ultrasound bubble counter. Venous air bubble measurements were made after the MPC bubble trap and the ECC hard‐shell reservoir, respectively. Arterial air bubble data were obtained after the arterial filters (40 µm). Venous bubble count was significantly ( P < 0.01) reduced in the MPC group (5–250 µm, 681 ± 177; >40 µm, 288 ± 92) compared with the ECC group (5–250 µm, 19 272 ± 682; >40 µm, 7642 ± 520). After the arterial filter, minimal numbers of air bubbles (5–250 µm, 172 ± 59; >40 µm, 0) could be detected in the MPC group, but large amounts of air (5–250 µm, 16 194 ± 1072; >40 µm, 3732 ± 997) were measured in the ECC group. The air elimination of the modern MPC is superior to conventional ECC, which may result in a reduction of neurological complications.