Aspiration of cerebrospinal fluid--not always a dural tap.
Cantelo
R A
RA
Walsh
G R
GR
D000767:Anesthesia, Epidural / Q000009:adverse effects*; D002555:Cerebrospinal Fluid; D004322:Drainage; D004824:Epidural Space; D005260:Female; D006801:Humans; D008875:Middle Aged; D011677:Punctures / Q000009:adverse effects*