Population
100 consecutive patients who underwent spinal anaesthesia for urological surgery
Design
Cross-sectional
Follow-up
24 to 48 hours postoperatively
Authors
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Multiple attempts associated with higher PDPH risk; hypothesis-generating and requires prospective confirmation before practice change.
Multiple attempts at subarachnoid puncture during spinal anaesthesia significantly increase the risk of postdural puncture headache.
Harrison et al. (1992) studied this question.
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