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. 2017 Apr 7;2017(4):CD010807. doi: 10.1002/14651858.CD010807.pub2

Puolakka 1997.

Methods Prospective follow‐up study
Participants A total of 400 patients were included in this study
Interventions Patients were randomly selected to have a spinal anaesthesia using either a 27 G Quincke‐type needle or a 27 G pencil point needle
Outcomes The primary outcome was the severity of needle damage according to the type and number of attempts
Notes