TY - JOUR
AU - Colin H. M. Walker , Lyman Blackwell , and Oliver Massengale
AB -  INDICATOR A new electronic blood level indicator1 COLIN OLIVER H. M. WALKER, MASSENGALE University Colorado LYMAN BLACKWELL, AND Department of Pediatrics, Medical Center, Denver, of Colorado MPROVEMENTS are continually being made in the control of blood volume during extracorporeal pump oxygenation. The methods used include electromagnetic flowmeters (1-4)~ weight monitoring of the animal or parts of the circuit (5,6), and control of extracorporeal volume by level-sensing devices. These devices utilize floats (7), photoelectric techniques (8), platinum pin electrodes (4, 9-1 I), or other make-and-break level detectors (I 2, I 3) and capacitance circuits (I 4-17). The apparatus here described is a capacitance level detector which has certain advantages over some other reported systems in that it provides a more sensitive, continuous indication of volume while maintaining simplicity of structure and ease of sterilization and operation. APPARATUS The apparatus built by one of us (Blackwell) consists of a detecting probe (Fig. K) which is partially immersed in the conductive fluid (in this case blood), a control box, and an indicator system. An output terminal is available for recording Received for publication I 8 October I 960. 1 Support for this work was received from the University Colorado Medical Center 
TI - A new electronic blood level indicator
JF - Journal of Applied Physiology
DA - 1961-09-01
UR - https://www.deepdyve.com/lp/the-american-physiological-society/a-new-electronic-blood-level-indicator-onMILHDHI3
VL - 16
IS - 
DP - DeepDyve
ER -