Tapping Test in Patients With Painful Bone Marrow Edema of the Knee

Autor: Roland Meizer, Stephan T. Becker, Christian Radda, Dominik Meraner, Franz Landsiedl, Nicolas Aigner
Rok vydání: 2008
Předmět:
Zdroj: The Clinical Journal of Pain. 24:131-134
ISSN: 0749-8047
Popis: Although bone marrow edema (BME) of the knee is a common phenomenon, physical tests to diagnose this condition have not been investigated. We hypothesized that a mallet test would be useful as a diagnostic aid and a screening tool.Seventy patients (36 female, 34 male) were investigated in this controlled study. Group 1 consisted of patients with painful BME in the knee and group 2 of patients with a painful knee without BME. Pain provoked by a reflex mallet was assessed for each quadrant on a visual analog scale (VAS).The VAS score was 3.7 (+/-2.1 cm) for quadrants affected by BME (group 1), 1.59 (+/-1.44) in nonaffected quadrants of the knee affected by BME (group 1) and, 0.85 (+/-0.85) in painful knees without BME (group 2). Pain on the tapping test was significantly correlated with the presence of BME in the affected knee (P0.0001) and the affected quadrant (P0.0001 for the medial femoral condyle and the medial femoral plateau). A threshold value of VAS 2.0 for a tapping test to be positive in the distinction of BME affected quadrants of group 1 and all quadrants of group 2 sensitivity was 90.4%, specificity 83.7%, positive predictive value 73.4%, and negative predictive value 94.6% was determined.The tapping test is a good screening instrument to diagnose BME in the knee.
Databáze: OpenAIRE