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Emergency Orthopedics, 6e | Part I. Orthopedic Principles and Management > | Hematoma Block
Excerpt:
"This technique is frequently employed for anesthesia during reduction of distal radius (Colles') fractures, but the principles apply to any type of fracture. The infiltration of local anesthetic agent within a fracture serves to block the nerve fibers of the surrounding soft tissues and periosteum. To perform this procedure, a large-bore needle is used to withdraw blood from the fracture and replace it with local anesthetic agent. For a distal radius fracture, a total of 10 to 15 mL of 1% lidocaine is injected directly into the fracture site (Video 29). Following the injection, place an elastic bandage around the wrist and allow 10 minutes for proper anesthesia.53 One small study showed that a hematoma block improved pain scores greater than the administration of procedural sedation.54 This technique is only effective during acute management, when the hematoma has not become coagulated...."
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