Length of spinal needles
نویسندگان
چکیده
منابع مشابه
Deflection of spinal needles by the bevel.
Bevelled spinal needles sizes 22 and 25 gauge were passed through tough meat to assess the influence of bevel orientation on the path of the needle. The needle bent away from the bevel surface by about 1 mm for each centimetre of needle travel through the tissue. With an introducer, the deviation was reduced by a reduction of the distance of unsupported travel. Pencil-point needles were less de...
متن کاملPredictions of the Length of Lumbar Puncture Needles
INTRODUCTION The lumbar puncture is a well-known neurological procedure. The purpose of this study is to build an accurate mathematical formula to estimate the appropriate depth for inserting a lumbar puncture needle for a beginner. METHODS This is a retrospective study of patients who underwent magnetic resonance imaging (MRI) of the L-spine. The depth from the skin to the posterior and ante...
متن کاملVariations in the flow of cerebrospinal fluid through spinal needles.
The dimensions of currently available spinal needles (0.7 mm (22-gauge) to 0.45 mm (26-gauge) external diameter) were measured and compared with the International Standard (ISO 7864-1984 E). The in vitro performance of the needles was assessed by comparing times to appearance of cerebrospinal fluid and flow rates through the needles. There were wide variations in the measurements and performanc...
متن کاملBacterial contamination of needles used for spinal and epidural anaesthesia.
We have investigated prospectively the incidence of bacterial contamination of 114 spinal and 20 epidural needles collected immediately after lumbar puncture of the subarachnoid or epidural space. Bacteriological examination revealed bacterial contamination of 24 (17.9%) of the needles, mainly coagulase-negative staphylococci (21; 15.7%) followed by yeasts (2; 1.5%), enterococcus (1; 0.8%), pne...
متن کاملThe history of spinal needles: getting to the point.
The history of the design of spinal needle tips is discussed, from the first needles used by J. Leonard Corning in 1885 to innovative, modern needle designs that continue to appear on the market. The shape of the needle tip started as a cutting bevel and developed into the atraumatic tip and the pencil-point tip in current common use. Innovative designs such as the stylet-tipped needle and the ...
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ژورنال
عنوان ژورنال: Anaesthesia
سال: 2008
ISSN: 0003-2409,1365-2044
DOI: 10.1111/j.1365-2044.2008.05512.x