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Wiley InterScience | ||||||||||||
  AnaesthesiaVolume 45 Issue 9, Pages 751 - 753 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: 227K) | Related Articles | Citation Tracking  Resistance to fluid flow through two spinal needles Copyright 1990 The Association of Anaesthetists of Great Britain and Ireland KEYWORDS
Anaesthetic techniques, regional; spinal •
Equipment; needles ABSTRACT
A new needle, 120 mm long and 26 gauge in diameter, has been introduced for subarachnoid anaesthesia. The resistance to flow through the needle was measured using a pressure monitor infusion pump and compared with the resistance to flow through a 90-mm 26-gauge needle; there was a threefold increase in resistance in the 120-mm needle compared to the 90-mm needle, which could not be explained by the difference in length alone and must reflect a decrease in the internal diameter of the long needle. This results in difficulty in identifying the subarachnoid space by backflow of cerebrospinal fluid. Accepted 23 October 1989 | 
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