Dermatome
A specific area of skin innervated by a single spinal nerve root, used to assess the level and extent of neuraxial blockade.
Full Definition
In obstetric anesthesia, a dermatome refers to the specific area of skin supplied by sensory fibers from a single spinal nerve root. Anesthesiologists use dermatome mapping to assess the height and adequacy of epidural or spinal blocks during labor and delivery. The T10 dermatome (umbilicus level) is typically the target for adequate analgesia during the first stage of labor, while T4-T6 levels may be required for cesarean delivery. Understanding dermatome distribution is essential for determining block success and identifying potential complications.
Usage
Usage note: Always specify the anatomical level (e.g., T4, T10) when describing dermatome assessment.
In Context
- "The anesthesiologist assessed the dermatome level using ice to ensure adequate coverage for the cesarean section." — Surgical procedure note
- "A T6 dermatome level was confirmed bilaterally before surgical incision." — Anesthesia record