Effect of epidural corticosteroid injection on magnetic resonance imaging findings.
10.3344/kjp.2017.30.4.281
- Author:
Min Soo KIM
1
;
Tae Yoon JEONG
;
Yu Seon CHEONG
;
Young Wook JEON
;
So Young LIM
;
Seong Sik KANG
;
In Nam KIM
;
Tsong Bin CHANG
;
Hyun Ho SEONG
;
Byeong Mun HWANG
Author Information
1. Department of Anesthesiology and Pain Medicine, Institute of Medical Sciences, Kangwon National University Hospital, School of Medicine, Chuncheon, Korea. arim14@kangwon.ac.kr
- Publication Type:Original Article
- Keywords:
Air;
Artifacts;
Epidural injection;
Epidural space;
Glucocorticoids;
Magnetic resonance imaging;
Needle
- MeSH:
Artifacts;
Epidural Space;
Glucocorticoids;
Humans;
Incidence;
Injections, Epidural;
Low Back Pain;
Magnetic Resonance Imaging*;
Medical Records;
Needles;
Spinal Diseases;
Spine
- From:The Korean Journal of Pain
2017;30(4):281-286
- CountryRepublic of Korea
- Language:English
-
Abstract:
BACKGROUND: Magnetic resonance imaging (MRI) of the spine is the preferred diagnostic tool for pathologic conditions affecting the spine. However, in patients receiving epidural corticosteroid injection (ESI) for treatment of spinal diseases, there is a possibility of misreading of MR images because of air or fluid in the epidural space after the injection. Therefore, we defined the characteristics of abnormal changes in MRI findings following an ESI in patients with low back pain. METHODS: We reviewed the medical records of 133 patients who underwent MRI of the lumbar spine within 7 days after ESI between 2006 and 2015.All patients were administered an ESI using a 22-gauge Tuohy needle at the lumbar spine through the interlaminar approach. The epidural space was identified by the loss of resistance technique with air. RESULTS: The incidences of abnormal changes in MRI findings because of ESI were 54%, 31%, and 25% in patients who underwent MRI at approximately 24 h, and 2 and 3 days after ESI, respectively. Abnormal MRI findings included epidural air or fluid, needle tracks, and soft tissue changes. Epidural air, the most frequent abnormal finding (82%), was observed in 41% of patients who underwent MRI within 3 days after injection. Abnormal findings due to an ESI were not observed in MR images acquired 4 days after ESI or later. CONCLUSIONS: Pain physicians should consider the possibility of abnormal findings in MR images acquired after epidural injection using the interlaminar approach and the loss of resistance technique with air at the lumbar spine.
