๐ The adult needle is 10 cms long ( shaft measures 8 cms ). 15 cms long needles are also available for obese patients
๐ The markings are 1 cm apart for the adult needle and 0.5 cm for the pediatric one
๐ For the adult 16 & 18 G are the commonly used ones, whereas for the pediatric 19 G needles are available
๐ Touhy is the commonly used needle
๐ Regarding the tip: ✔️The bevel is angled at 20 degree with the shaft ✔️ It is known as Huber point ✔️ It's blunt ✔️ All these features aid in the effectiveness of Loss of Resistance Technique
๐ Regarding the catheter: ✔️ It's made of nylon or teflon ✔️ The distal tip is rounded and closed ✔️So fluid can escape only through the side ports. All these features helps to reduce chances of dural puncture and vascular injury
๐ The adult catheter is 90 cms long
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