Normal hematological values for African green monkeys have been reported, but these results are confounded by the effect of chemical restraint (ketamine), physical restraint, and capture stress. The dual-lumen central venous catheter, jacket, and tether combination described allows intravenous fluid administration and repeated blood sampling without using restraint or anesthesia. The use of a low-concentration heparin solution for catheter maintenance resulted in a significant increase in mean patency time compared ...