CMC, or carpometacarpal joint arthritis, is diagnosed through a combination of physical examination and symptom evaluation. A key part of the physical exam is the CMC grind test.
The CMC Grind Test
- Procedure: During this test, the doctor applies pressure through the thumb while simultaneously rotating it.
- Positive Result: A positive test is indicated by the patient feeling pain and a crunching sensation in the joint.
- Purpose: This test helps identify if there is arthritis at the base of the thumb.
Diagnosis of CMC Arthritis
| Diagnostic Method | Description |
|---|---|
| Physical Examination | Includes the CMC grind test, as described above. |
| Symptom Evaluation | The doctor also considers the patient’s reported symptoms, such as pain, stiffness, and reduced mobility. |
| Imaging | X-rays are usually used to confirm diagnosis and assess the severity of the arthritis. |
It's important to note that while the CMC grind test is a significant diagnostic tool, it is only part of the overall diagnostic process. A doctor will consider various factors to accurately diagnose CMC arthritis.
