Final answer:
A critical factor to ensure the effectiveness of traction in reducing and immobilizing fractures is frequent knot checks. Continuous traction and avoiding heavy weights are also important considerations.
Correct option is D
Step-by-step explanation:
In order to ensure the effectiveness of traction in reducing and immobilizing fractures, a critical factor is frequent knot checks. This involves regularly inspecting the knots and ropes used in the traction setup to ensure they are secure and haven't come loose. By doing so, we can prevent any unintentional release of traction force and maintain the proper immobilization of the fracture.
Continuous traction is also important as it provides a consistent and steady force to the affected area. Intermittent traction, on the other hand, involves periodic release and reapplication of force, which may not be as effective in immobilizing the fracture.
Heavy weights are not necessary for traction, as the amount of force required depends on the specific fracture and the individual patient. Too much weight can actually be detrimental and increase the risk of complications. Therefore, it's important to follow the guidance of a healthcare professional when determining the appropriate amount of weight for traction.