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.
The 18-gauge Tuohy needle and epidural catheter (Perifix[R] Standard Epidural Catheter, B.
18G Tuohy needle is introduced through the mark and advanced directly perpendicular to the skin, until contact with transverse process of the particular vertebra.
Tenders are invited for Epidural Kit- 17/18 G Tuohy Needle 90 Mm Loss Of Resistance Syringe 5 Ml-10 Ml Epidural Catheter To Pass Through The Above Needle 19/20 G 90 Cm Radio-Opaque, Markings @ 5/10/15/20 Cm Continuous From 12 To 17 Cm With Connector Catheter Guide Filter To Attach To Above Catheter 0.22 Size All Of Above Packed In A Sterile Pack, B Braun/Bd/Vygon Or Equivalent Quality Imported
A T10/11 thoracic epidural was placed using a long (11 cm) Tuohy needle (loss of resistance to saline at 10 cm) and a single-shot spinal was performed at L4/5 using a long Tuohy needle as an introducer (loss of resistance to saline at 9.5 cm) for a Gertie Marx[R] spinal needle (25 gauge, 150 mm).
This insulated Tuohy needle can then be used as a stimulating needle by attaching it to the 'crocodile' caliper of a nerve stimulator as is shown in Figure 1.
With the patient in the sitting, flexed position, an 8 cm 18 gauge Tuohy needle was used to locate the epidural space at a lumbar interspace that was thought to be L3/4.
Following dural puncture, 265 respondents (64%) indicated that they "would usually remove the Tuohy needle and resite" The most common reason for this decision was concern regarding the safety of intrathecal catheters (ITC) (n=236, 89%), in particular, the risk of misuse (n=182, 70%).
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.K.).
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.