Comparison of ultrasound and fluoroscopic guidance for injection in CT arthrography and MR arthrography of the hip.
OBJECTIVE
To evaluate the usefulness of ultrasound-guided versus fluoroscopy-guided injection in CT arthrography and MR arthrography.


METHODS
We reviewed all CT arthrography and MR arthrography studies done at our center between October 1, 2014 and October 1, 2015. We analyzed 32 studies: 26 with fluoroscopic guidance and 6 with ultrasound guidance. We compared the two techniques on the following parameters: presence of sufficient contrast material in the joint, extravasation or injection of contrast material in the soft tissues (presence of contrast material in the psoas or other soft tissues), and intra-articular gas bubbles. We used SPSS V. 20 to compare the techniques with Pearson's chi-square tests.


RESULTS
Contrast material was observed in soft tissues in 56.3% of ultrasound-guided injections, making 6.3% of the procedures invalid for diagnostic purposes. Extravasation of contrast material was observed in 53.8% of fluoroscopy-guided procedures, making 3.8% invalid for diagnostic purposes. Intra-articular gas was observed in 21.9% of ultrasound-guided studies and in 38.5% of fluoroscopy-guided studies. None of the differences between techniques were statistically significant at p<0.05.


CONCLUSIONS
Our study shows that ultrasound is as useful as fluoroscopy for injecting contrast material for CT arthroscopy and MR arthroscopy; ultrasound has the advantage of not using ionizing radiation.
Servicio de Radiodiagnóstico, Complejo Hospitalario Universitario de Granada, Granada, España. Electronic address: rralbert.martinez@gmail.com.
A
A
Martínez-Martínez
Servicio de Radiodiagnóstico, Complejo Hospitalario Universitario de Granada, Granada, España.
J
J
García-Espinosa
Servicio de Radiodiagnóstico, Complejo Hospitalario Universitario de Granada, Granada, España.
F
F
Ruiz-Santiago
Servicio de Radiodiagnóstico, Complejo Hospitalario Universitario de Granada, Granada, España.
L
L
Guzmán-Álvarez
Servicio de Radiodiagnóstico, Complejo Hospitalario Universitario de Granada, Granada, España.
M M
MM
Castellano-García
D000293:Adolescent; D000328:Adult; D001175:Arthrography / Q000379:methods*; D003287:Contrast Media / Q000008:administration & dosage*; D005260:Female; D005471:Fluoroscopy; D006621:Hip Joint / Q000000981:diagnostic imaging*; D006801:Humans; D007267:Injections; D007592:Joint Diseases / Q000000981:diagnostic imaging*; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography; D055815:Young Adult
D003287:Contrast Media
Articulación de cadera; Fluoroscopia; Fluoroscopy; Hip joint; Intervencional; Interventional; MRI scan; Ultrasonografía; Ultrasonography