Abstract: A splint apparatus for use with intravenous therapy includes an upper portion adapted to be positioned above a patient's limb joint, and a lower portion connected to the upper portion at an angle from 0 to 90 degrees, and preferably between 30 and 60 degrees, the lower portion including a pair of sides and a central aperture for passage of an intravenous catheter. The lower portion is adapted to be positioned and secured below a patient's limb joint, so that the upper portion prevents flexion of the patient's limb joint beyond the defined angle. The apparatus provides an inexpensive method of limb restraint allowing free movement of the limb with the ability for the patient to stand, sit, or lay down easily and without discomfort, while simultaneously preventing bending the limb more than a predetermined angle so as to allow a free flow of IV fluids.