Dural Sac Compression
Mechanical compression of the dural sac during pregnancy due to increased intra-abdominal pressure and vascular engorgement.
Full Definition
A condition occurring during pregnancy where the dural sac containing cerebrospinal fluid becomes compressed due to increased intra-abdominal pressure, epidural vascular engorgement, and anatomical changes. This compression can affect the spread and efficacy of neuraxial anesthetics, potentially requiring dose adjustments. The condition is most pronounced in late pregnancy and can influence both epidural and spinal anesthetic distribution patterns. Understanding this phenomenon is crucial for anesthesiologists when planning neuraxial blocks in obstetric patients.
Usage
Usage note: Should not be confused with dural puncture, which is an accidental breach of the dura mater.
In Context
- "The anesthesiologist reduced the local anesthetic dose due to anticipated dural sac compression in this term parturient." — Anesthetic record
- "Dural sac compression may explain the higher sensory block level achieved with the same volume of local anesthetic." — Case report