Effects of Injection Site on the Accuracy of Thermal Washout: Methods and Materials (4)
Rahway, NJ) was passed through the venous circuit and its tip was placed just above the inflow valve, forming another injection port. Another Swan-Ganz catheter, the tip of which was outside the circuit from another port 5 cm above the inflow valve, was placed separately in the venous circuit to detect the influence of catheter cooling on EFs. A rapid response thermistor (identical to that used in the venous circuit) was placed 5 cm above the outflow valve, temperature changes were analyzed by cardiac output computer (identical to that used for measurement in patient), and a thermal washout curve was recorded on a thermal array recorder (WS-641G, NihonKohden, Tokyo, Japan) at a paper speed of 25 mm/s. buy flovent inhaler
Functional Characteristics of the Pump: The stroke frequency of the pump could be varied from 0 to 100 per minute, and the EF was from 0.3 to 0.65. The volume of water displaced by the piston pump (ventricular stroke volume) could be adjusted to any value between 45 and 90 ml by changing the eccentricity of the plunger attachment on a rotating wheel, and it was calibrated by direct measurement of die ejected volume in the cylinder. The volume of the chamber was determined by measuring the water content at diastolic phase and the EF was calculated.