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Wiley InterScience | ||||||||||||
  AnaesthesiaVolume 44 Issue 5, Pages 415 - 418 Published Online: 22 Feb 2007 Journal compilation © 2010 The Association of Anaesthetists of Great Britain and Ireland Journal of the Association of Anaesthetists of Great Britain and Ireland
Abstract | References | Full Text: PDF (Size: 656K) | Related Articles | Citation Tracking  Fluid flow through dural puncture sites An in vitro comparison of needle point types *Present appointment: Senior Registrar in Anaesthetics, Leeds General Infirmary, Great George St, Leeds LSI 3EX. Copyright 1989 The Association of Anaesthetists of Great Britain and Ireland KEYWORDS
Anaesthetic techniques, regional; spinal •
Equipment
ABSTRACT
Leakage of artificial cerebrospinal fluid through human dura was measured in vitro after puncture by spinal needles. Fluid loss tailed off in all cases and ceased within 5 minutes in 10% of punctures made with a 22-gauge needle, 28% made with a 26-gauge and 65% made with a 29-gauge needle (p < 0.05). The fluid loss was not reduced by alignment of the bevel of the needle parallel to the longitudinal direction of the fibres. Whitacre point needles of 22 gauge produced lower fluid loss than a 22-gauge Quincke point needle inserted across the fibres (p < 0.05). Leakage rate was related to needle size, but not related to the alignment of a Quincke point. Little or no leakage occurred with 29-gauge needles. Accepted 5 December 1988. | 
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