Hiroshima journal of medical sciences
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Hiroshima J. Med. Sci. · Jun 2003
Distance from the skin to the epidural space at the first lumbar interspace in a Japanese obstetric population.
We prospectively examined the distance from the skin to the epidural space (SE distance) in 95 Japanese parturient women who underwent epidural anesthesia at the L1-2 interspace, and studied the correlation between various physical factors and SE distance. The same anesthesiologist inserted the epidural tubing with the patient in the right lateral decubitus position. An epidural needle was introduced into the skin vertically via the midline approach. ⋯ The correlation of body weight with SE distance was the highest of the physical factors (r2 = 0.800, p = 0.0001), and a simple regression equation was formulated to aid in predicting SE distance: "SE distance (cm) = 0.05 x body weight (kg) + 0.36". This formula will be a useful clinical guide for administering epidural anesthesia in Japanese parturient women. In conclusion, the SE distance in most Japanese parturient women is between 3 and 4 cm at the L1-2 interspace and this value is most closely correlated with their body weight.