Tuohy's needle is used for?

Appeared in: BCCL kharkhanda Staff Nurse - 2015

Explanation

The Tuohy needle is the standard instrument for placing catheters for epidural anesthesia.
It features a characteristic curved, blunt tip known as a Huber tip.
This design allows the needle to pass through the tough ligaments of the spine but helps prevent accidental puncture of the dura mater.
The curve also helps to direct the flexible epidural catheter sideways into the epidural space for continuous infusion of anesthetic medication.

Option A: Spinal anesthesia requires intentionally puncturing the dura mater to deliver medication directly into the cerebrospinal fluid (CSF).
Option C: Local anesthesia involves numbing a small area of tissue, such as for suturing a cut.
Option D: A nerve block targets a specific nerve or group of nerves to anesthetize a larger region, like an entire limb.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Application of Tuohy Needle in Anesthesia as background academic context rather than a clinical decision trigger.
Correct needle identification is critical for patient safety. Using a Tuohy needle for an epidural procedure minimizes the risk of an accidental dural puncture (ADP).
An ADP can lead to a post-dural puncture headache (PDPH), a severe, positional headache caused by cerebrospinal fluid (CSF) leakage, which can be debilitating for the patient.
Nurses play a key role in monitoring for complications. After an epidural, the nurse must assess for signs of PDPH, neurological changes, and effectiveness of the block.

How to Approach the Question

Identify the key term in the question: "Tuohy's needle".
This is a factual recall question about a specific piece of medical equipment.
Recall the primary function of this specialized needle. The name "Tuohy" is strongly associated with a particular type of anesthesia.
Associate the Tuohy needle's unique curved-tip design with its purpose: to safely access the epidural space without puncturing the dura mater.
Differentiate this from the needles used for other types of anesthesia listed in the options. Spinal needles are sharp to puncture the dura, while local anesthesia and nerve blocks use different types of needles.
Select the option that correctly matches the instrument to its primary use, which is epidural anesthesia.

Concept Tested & Keywords

Q7AM2EHK92zTScLAmcmDOy

E6 Nursing Brunner Adult Health 3SA Vol 1 Part 1 p. 102-104

E6 Nursing Fundamentals Potter Perry 12e Part 5 p. 162-164

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