Safety of MR scanning in patients with nonferromagnetic aneurysm clips.
The purpose of this study was to report our surveillance of patients with nonferromagnetic aneurysm clips (NFAC) who have undergone magnetic resonance imaging (MRI). Forty-six patients with NFAC underwent MRI over a 7-year period. Medical records were studied for evidence of subjective or objective clinical findings as a result of the MRI scan. In two patients with subjective complaints, computed tomograms (CT) were reviewed and patient interviews conducted. No significant neurologic signs or longterm symptoms were experienced. Two patients did not complete their MRI scans due to transient unilateral head pain in one and head "pressure" in another. CT scans in these patients demonstrated no evidence for hemorrhage or visible change in clip position. We documented no objective adverse outcome of patients undergoing MRI with NFAC, confirming that MRI can be performed safely in patients with nonferromagnetic aneurysm clips. The cause of subjective complaints in two of our patients is unknown.
Department of Radiology, The University of Texas Southwestern Medical Center at Dallas, 75235-8896, USA.
G L
GL
Pride
J
J
Kowal
D B
DB
Mendelsohn
D P
DP
Chason
J L
JL
Fleckenstein
D000328:Adult; D001014:Aortic Aneurysm / Q000175:diagnosis* / Q000601:surgery*; D001672:Biocompatible Materials; D004869:Equipment Safety; D005260:Female; D006801:Humans; D002532:Intracranial Aneurysm / Q000175:diagnosis* / Q000601:surgery*; D008279:Magnetic Resonance Imaging / Q000009:adverse effects* / Q000379:methods; D008280:Magnetics; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D019736:Prostheses and Implants; D012189:Retrospective Studies; D012307:Risk Factors; D013193:Stainless Steel; D013525:Surgical Instruments; D014656:Vascular Surgical Procedures / Q000295:instrumentation
D001672:Biocompatible Materials; D013193:Stainless Steel