Figure 3.
Placement of intradermal water blocks: 4 intradermal injections of 0.05 to 0.1 mL of sterile water to form 4 small blebs over each posterior superior iliac spine and 3 cm below and 1 cm medial to each spine. The exact locations of the injections do not appear to be critical to the block success. Reprinted with permission from Simkin P, Bolding A. Update on nonpharmacologic approaches to relieve labor pain and prevent suffering. J Midwifery Womens Health. 2004;49(6):489–504.19 Copyright © 2004 Elsevier.