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DOI: 10.1055/s-2003-40434
Direkte MR-Arthrographie des Handgelenks im Vergleich zur Arthroskopie: Eine prospektive Studie an 125 Patienten
Direct MR Arthrography of the Wrist in Comparison with Arthroscopy: A Prospective Study on 125 PatientsPublication History
Publication Date:
08 July 2003 (online)
Zusammenfassung
Ziel: Bestimmung der diagnostischen Genauigkeit der direkten MR-Arthrographie in der Diagnostik von intraartikulären Pathologien des Handgelenks. Material und Methoden: Prospektiv und geblindet wurden 125 Patienten mit karpaler Beschwerdesymptomatik am Tag vor einer Arthroskopie mittels direkter Arthro-MR-Tomographie untersucht. Nach radiokarpaler und mediokarpaler Injektion eines Kontrastmittelgemisches wurden an einem 1,5-Tesla-Scanner folgende Sequenzen akquiriert: koronal T1-w SE, koronal T1-w SE fettsaturiert, koronal T1-/T2*-DESS-3D und sagittal T2*-w MEDIC. Die MR-tomographischen Befunde wurden in einer statistischen Analyse mit denen der Arthroskopie verglichen (SEN = Sensitivität, SPE = Spezifität, PPV = positiver Vorhersagewert, NPV = negativer Vorhersagewert, ACC = Genauigkeit). Ergebnisse: Im Vergleich mit der Arthroskopie als diagnostischem Goldstandard wies die MR-Arthrographie folgende diagnostische Kenndaten auf: Detektion von TFCC-Läsionen: SEN 97,1 %, SPE 96,4 %, PPV 97,1 %, NPV 96,4 %, ACC 96,8 %. Für den Nachweis kompletter Rupturen des Lig. scapholunatum: SEN 91,7 %, SPE 100 %, PPV 100 %, NPV 99,1 %, ACC 99,2 % (Teilrupturen: SEN 62,5 %, SPE 100 %, PPV 100 %, NPV 94,8 %, ACC 95,2 %). Erkennen von Läsionen des hyalinen Gelenkknorpels: SEN 84,2 %, SPE 96,2 %, PPV 80 %, NPV 97,1 %, ACC 94,4 %. Im Gesamtkollektiv fanden sich nur 3 Läsionen des Lig. lunotriquetrum. Schlussfolgerungen: Für das Erkennen intraartikulärer Pathologien des Handgelenks ist die MR-Tomographie in direkter Arthrographie-Technik gut geeignet, da sie bessere diagnostische Ergebnisse liefert im Vergleich zu den Literaturmitteilungen der Nativuntersuchung. Mit einer Genauigkeit von deutlich über 90 % ist die Indikation zur direkten MR-Arthrographie bei klinisch begründetem Verdacht auf eine Komplettruptur des skapholunären Ligaments oder des ulnokarpalen Komplexes gegeben.
Abstract:
Objective: In literature the diagnostic value of MRI for detecting lesions of the carpal ligaments and the TFCC is judged controversially. The aim of the following study is to determine the diagnostic accuracy of direct MR arthrography for depicting and staging of intraarticular lesions of the wrist. Material and Methods: One day before undergoing arthroscopy, 125 patients suffering from wrist pain were examined with direct MR arthrography in a prospective and blinded study. A mixture of contrast medium (iodine-containing contrast medium and gadopentetate in relation 200 : 1) was injected into both radiocarpal and midcarpal joints. The following sequences were acquired on a 1.5T scanner: coronal T1-weighted SE, coronal fat-saturated T1-weighted SE, coronal T1-/T2*-DESS-3D, and sagittal T2*-weighted MEDIC. MRI results were compared with arthroscopic findings using statistical analysis (SEN = sensitivity, SPE = specificity, PPV = positive predictive value, NPV = negative predictive value, ACC = accuracy). Results: In comparison to arthroscopy as the accepted diagnostic gold standard, the following results were found for MR arthrography. Detection of TFCC lesions: SEN 97.1 %, SPE 96.4 %, PPV 97.1 %, NPV 96.4 %, ACC 96.8 %. Detection of complete tears of the scapholunate ligament: SEN 91.7 %, SPE 100 %, PPV 100 %, NPV 99.1%, ACC 99.2%. Detection of partial tears: SEN 62.5 %, SPE 100 %, PPV 100 %, NPV 94.8 %, ACC 95.2 %. Detection of cartilage defects: SEN 84.2 %, SPE 96.2 %, PPV 80 %, NPV 97.1 %, ACC 94.4 %. In total, only three lesions of the lunotriquetral ligament were present. Conclusion: Direct MR arthrographic imaging is well suited for detecting intraarticular lesions of the wrist. The presented diagnostic results of MR arthrography are superior to the results of unenhanced MRI reported in the literature. Direct MR arthrography as a reliable diagnostic tool is strongly recommended if lesions of the scapholunate ligament and the triangular fibrocartilage complex are suspected. In contrast, an attitude of caution must be adopted in diagnosing lesions of the articular cartilage of the wrist.
Key words
Arthrography - articular cartilage - scapholunate ligament - magnetic resonance imaging (MRI) - TFCC - ulnocarpal complex - wrist
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Priv.-Doz. Dr. med. Rainer Schmitt
Institut für Diagnostische und Interventionelle Radiologie, Herz- und Gefäßklinik GmbH
Salzburger Leite 1
97616 Bad Neustadt an der Saale
Phone: ++49/9771-662901
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Email: schmitt.radiologie@herzchirurgie.de