Tuohy needle

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Related to Tuohy needle: Quincke needle

Tuo·hy nee·dle

a needle with a lateral opening at the distal end, designed to cause a catheter passing through the needle's lumen to exit laterally at a 45-degree angle; used for placing catheters into the subarachnoid or epidural space.

Tuohy needle

[Edward B. Tuohy, U.S. anesthesiologist, 1908–1959]
A needle with a curved point that is used in epidural anesthesia. The curve reduces the possibility that the point of the needle and the anesthetic will enter the dura mater.


Edward B., 20th century U.S. anesthesiologist.
Tuohy aortography needle
Tuohy needle - used to place catheters into the subarachnoid or epidural space.
Tuohy-Borst adapter
Tuohy-Borst introducer
References in periodicals archive ?
Based on these laboratory investigations, we conclude that an epidural catheter can be placed inside the dura through a Tuohy needle, albeit in dehydrated specimens.
Although there is a theoretical risk of introducing skin flora from the puncture site along the track of the Tuohy needle, to the authors' knowledge no infective sequelae have been reported following shearing damage to an epidural catheter.
With a 16 to 18 gauge Tuohy needle this results in a post dural puncture headache (PDPH) in up to 80% of cases (1-4).
An attempt was made to insert the epidural using a 16 gauge Tuohy needle at the T10-11 interspace, but this was complicated by a dural puncture as diagnosed by the free flow of cerebrospinal fluid (CSF).
Twenty minutes were required to locate the epidural space at a depth of 10 cm using a Portex 16 gauge 11 cm Tuohy needle (Smiths Medical, U.
To avoid direct trauma to the plexus on initial needle placement, an insulated Tuohy needle (Contiplex Tuohy, BBraun) connected to a nerve stimulator (Pajunk Vario) was placed with real time ultrasound control within the middle scalene muscle next to the trunks of the plexus.
An epidural was attempted in the sitting position, with a 16 gauge Tuohy needle at the L3-4 interspace, using loss of resistance to air.
This maybe related to the fact that the unmodified 22-gauge pencil-point needle has a shiny surface compared to that of the Tuohy needle, which has a dull surface finish.
With the patient in the right lateral position, a 16 gauge Tuohy needle was inserted by paramedian approach at the L3-4 interspace.
5 watts of power into the fibroids through Tuohy needles.