What is a symptom during the Roos Test that indicates a positive result?

The Roos Test, also known as the Elevated Arm Stress Test, is utilized to assess for thoracic outlet syndrome and involves having the patient maintain a specific position with their arms abducted, externally rotated, and elbows flexed at 90 degrees for a period of time while performing repetitive hand movements. A positive result in this test is indicated by the inability of the patient to maintain the test position due to symptoms such as pain, heaviness, or fatigue in the upper extremities.

When the individual cannot maintain the test position, it suggests that there may be neurovascular compromise, typically resulting from compression or irritation of the neurovascular structures as they pass through the thoracic outlet. This is a critical symptom pointing towards thoracic outlet syndrome. In this context, enduring discomfort or a sense of heaviness that leads to the inability to hold the position for the required time provides essential information about the underlying condition affecting the patient.

The other options do not reflect the criteria for a positive Roos Test result. Increased strength, symmetrical limb appearance, and no pain during movement would not indicate the presence of thoracic outlet syndrome and would thus not lead to a positive diagnosis in the context of this test.