Origin of the Balloon Technique as an Epidural-space Indicator

Carlos C. Castanõs2026-03-222026-03-22198010.1097/00000542-198002000-00034https://doi.org/10.1097/00000542-198002000-00034https://andeanlibrary.org/handle/123456789/86927enMedicineEpidural spaceBalloonSpace (punctuation)Origin of the Balloon Technique as an Epidural-space Indicatorletter