Piercing of dura during spinal anaesthesia.
D000773:Anesthesia, Obstetrical / Q000009:adverse effects*; D000775:Anesthesia, Spinal / Q000009:adverse effects*; D004388:Dura Mater / Q000293:injuries*; D005260:Female; D006261:Headache / Q000209:etiology*; D006801:Humans; D008318:Malpractice / Q000331:legislation & jurisprudence*; D011247:Pregnancy; D006113:United Kingdom