Dural puncture. Blood patch not always benign.
Cooper
G M
GM
Stride
P C
PC
D016362:Analgesia, Obstetrical; D017217:Blood Patch, Epidural / Q000009:adverse effects; D005260:Female; D006261:Headache / Q000209:etiology; D006801:Humans; D007744:Obstetric Labor Complications; D011247:Pregnancy