Fluoroscope guided epidural needle insertioin in midthoracic region: clinical evaluation of Nagaro's method

In the midthoracic region, a fluroscope guided epidural block has been proposed by using a pedicle as a landmark to show the height of the interlaminar space (Nagaro's method). However, clinical implication of this method was not fully evaluated. We studied the clinical usefulness of a fluorosc...

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Bibliographic Details
Published in:Korean journal of anesthesiology 2012, 62(5), , pp.441-447
Main Authors: Kim, Won Joong, Kim, Tae Hwa, Shin, Hwa Yong, Kang, Hyun, Baek, Chong Wha, Jung, Yong Hun, Woo, Young Cheol, Kim, Jin Yun, Koo, Gill Hoi, Park, Sun Gyoo
Format: Article
Language:English
Subjects:
analgesia
Clinical
epidural
fluoroscopy
thoracic vertebrae
마취과학
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Summary:In the midthoracic region, a fluroscope guided epidural block has been proposed by using a pedicle as a landmark to show the height of the interlaminar space (Nagaro's method). However, clinical implication of this method was not fully evaluated. We studied the clinical usefulness of a fluoroscope guided thoracic epidural block in the midthoracic region. Twenty four patients were scheduled to receive an epidural block at the T6-7 intervertebral space. The patients were placed in the prone position. The needle entry point was located at the junction between midline of the pedicle paralleled to the midline of the T7 vertebral body (VB) and the lower border of T7 VB on anteroposterior view of the fluoroscope. The needle touched and walked up the lamina, and the interlaminar space (ILS) was sought near the midline of the VB at the height of the pedicle. The authors could not insert an epidural needle at T6-7 ILS in two patients and it was instead inserted at T5-6 ILS. However, other patients showed easy insertion at T6-7 ILS. The mean inward and upward angulations were 25° and 55° respectively. The mean actual depth and calculated depth from skin to thoracic epidural space were 5.1 cm and 6.1 cm respectively. Significant correlation between actual needle depth and body weight, podendal index (kg/m) or calculated needle depth was noted. The fluorposcope guided epidural block by Nagaro's method was useful in the midthoracic region. However, further study for the caudal shift of needle entry point may be needed.
ISSN:2005-6419
2005-7563
DOI:10.4097/kjae.2012.62.5.441