1Reina MA, de Leon Casasola OA, Loper A, et al. An in vitro study of dural Iesions produced by 25-gauge Quincke and Whitacre needles evaluated by scanning electron microscopy. Reg Anesth Pain Med, 2000,25: 393-402.
2Wells JB, Sampson IH. Subarachnoid hemorrhage presenting as post dural puncture headache: a case report. Mt Sinai J Med, 2002, 69:109-110.
3Adler MD, Comi AE, Walker AR. Acute hemorrhagic complication of diagnotic lumbar puncture. Pediatr Emerg Care, 2001,17:184-188.