When using plaster of paris remember to use at least 10 layers for upper extremities and 15-20 layers for lower extremities.
Always apply the splint so that the joint above and below the fracture is immobilized.
On radius and ulnar fractures, a sugar tong splint will provide better immobilzation as it also prevents supination/pronation where a posterior long arm or volar splint only prevent flexion and extension.
Remember to make sure that the hand is placed in the position of function.
Though not required a stockinette provides an additional layer of skin protection and helps to make the ends of the splint looking cleaner. It can also help hold the splint in place as you ace wrap it.
Finally, make sure that you document neurovascular status pre and post splint placement and if any manipulation is done you should have a follow up xray taken to ensure alignment is satisfactory.
