In which conditions is the Sharp Purser test validated?

• A. All cervical spine trauma
• B. RA and Down’s Syndrome
• C. Only acute trauma cases
• D. None, it is not validated

Answer: (B)

The Sharp Purser test is specifically designed to assess the integrity of the transverse ligament, which is crucial for stabilizing the atlantoaxial joint in the upper cervical spine. This test is particularly relevant in conditions that compromise the ligament's function, such as Rheumatoid Arthritis (RA) and Down Syndrome.

In individuals with RA, the inflammation and subsequent erosion of the cervical spine can lead to instability. The transverse ligament may be stretched or ruptured, making the Sharp Purser test necessary to evaluate potential atlantoaxial instability. Similarly, those with Down Syndrome commonly exhibit anatomical features that predispose them to upper cervical instability, necessitating the use of this test to rule out potential danger.

Conditions such as general cervical spine trauma or acute cases do not specifically validate the use of the Sharp Purser test, which is more focused on the chronic instabilities associated with specific diseases like RA and Down Syndrome. Thus, the test’s effectiveness is affirmed within these particular contexts, making option B the accurate choice.