A disorder affecting the elbows and causing 4 percent of cases involving suspected lateral epicondylalgia, radial tunnel syndrome, or RTS, is a painful condition that athletes experience more frequently than others. Correctly assessing and diagnosing RTS is particularly challenging because there are several alternative diagnoses that clinicians must rule out. After it has been diagnosed, there are several approaches to managing the symptoms of RTS.
When a person’s muscles or upper-arm bones place pressure on the radial nerve, radial tunnel system may develop. The nerve compression may result in inflammation and neuropathy. Normally, the pressure occurs between the head of the radius and the supinator muscle. The nerve runs through a cavity called the radial tunnel, which lies between the supinator muscle and the joint of the humerus and radius. When the nerve is compressed, it may then cause pain to radiate along it and into the elbow.
The assessment of RTS may involve subjective and objective evaluations combined with differential diagnoses. Imaging is not as useful for proper identification of the syndrome, but it may help to rule out degenerative elbow disorders.
People who are suffering from RTS commonly report the following:
Clinicians will still need to rule out some other potential diagnoses in patients reporting these symptoms, including lateral epicondylalgia and others, however.
An objective assessment will involve a postural and neural examination. The clinician will also use palpitation and resistance supination and extension. In the postural examination, the clinician will assess the patient’s whole-body posture, looking for pathological signs in the proximal region. People who have radial tunnel syndrome often have positive results on tension tests that are performed on their radial nerves during the neural examination.
The clinician may palpitate the supinator muscle on the side of the elbow to determine whether doing so causes any pain. If it does, he or she may then ask t he patient to place his or her forearm in a pronated position to see if the pain is relieved. If both are true, radial tunnel syndrome may be the culprit. Clinicians may also perform resistance supination and extension tests. People with radial tunnel syndrome will experience pain when they contract their supinators, and they may find that resistance extension is painful and weak.
The management of radial tunnel syndrome is poorly understood because of a lack of research. Some studies have indicated that there is a potential benefit of corticosteroid injections or physiotherapy. Other management techniques may include nerve gliding and stretching exercises. Manual therapies that may be beneficial include spinal manipulation, manual soft tissue and peripheral therapies.
The incidence of the disorder in the workplace may be prevented by making ergonomic changes to the workstations of workers. Finally, functional strength training exercises may help to decrease the pressure and alleviate the pain.
Radial tunnel syndrome presents a diagnostic challenge for clinicians. When it is correctly identified, the symptoms may be managed so that the patient’s pain symptoms may be alleviated.
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