The Lunatotriquetrial Ballottement Test is a wrist examination procedure that evaluates carpal instability. The lunate is a carpal bbone that is commonly dislocated because of trauma. This test will determine the integrity of the carpal bones for possible dislocation. Another name for this procedure is Shuck Test.
The patient should be awake and cooperative when the Lunatotriquetral Ballottement test is done.
- Patient must be seated while the test is being done.
- Grasp the triquetrium with one hand while the other holds the lunate.
- Move the lunate anteriorly and posteriorly (forward and backward).
- Take note of any signs of pain, laxity or crepitis.
Positive Lunatotriquetrial Ballottement Test
A Lunatotriquetrial Ballottement test is positive when the patient shows signs of pain or when there is laxity or crepitis while moving the lunate. This could indicate carpal instability, DJD or rheumatoid arthritis (RA).
The lunate is the most easily dislocated carpal bone. A Lunatotriquetral Ballottement test may be used to evaluate the integrity of the carpal bone however the examiner must still exercise caution in the compression of the median nerve using anterior and posterior pressure over the lunate.