An intravenous cannula was inserted into an antecubital vein and kept patent with saline to allow for frequent blood sampling starting at 1830 h on day 1.
One catheter was inserted in retrograde fashion in a dorsal hand vein for blood sampling, with the vein kept patent by placing the hand in a heated box at 55°C (11).
Both lines were kept patent with solutions of physiological saline.
The cannulas were kept patent with an intravenous infusion of 0.9% saline solution.
Both intravenous lines are kept patent with a slow infusion of normal saline.
Catheters were kept patent with 4% sodium citrate in sterile saline (Jorgensen Laboratories, Inc., Loveland, CO, USA).
Lines were kept patent by a slow infusion of isotonic saline.
Both venous lines were kept patent by a slow 0.9% NaCl saline drip.
Both cannulas were kept patent by a 3 IE/mL 0.9% NaCl heparin solution.
The catheters were kept patent by intermittent flushing with sterile sodium citrate throughout the procedure.
ACTs drawn from catheters kept patent using heparin flush also result in prolonged measurements.
