The voltage used during electroconvulsive therapy is typically?

Appeared in: MNS 2024

Explanation

The standard voltage range for Electroconvulsive Therapy (ECT) is typically 70-120 volts.
This electrical potential is necessary to overcome the high impedance (resistance) of the scalp and skull to deliver sufficient current to the brain.
The goal is to induce a generalized seizure lasting at least 25 seconds, which is believed to be the primary mechanism of therapeutic action.
While older constant-voltage devices operated in a 70-170V range, modern constant-current devices adjust the voltage within this typical range to deliver a precise electrical dose.

Why Other Options Were Wrong

Option A: The lower end of this range, 30 volts, is generally too low to overcome the skull's resistance and reliably trigger a therapeutic seizure.
Option B: This range is too narrow. While the voltage might fall within 50-100V for some patients with low seizure thresholds, the standard range extends higher to accommodate individual variations.
Option C: While the voltage can occasionally exceed 120V (up to 170V in some devices), the typical and most commonly cited range starts at 70V. This option's lower limit of 80V is too high.

Related Visual

Clinical Relevance

Nursing practice connection: Knowing Electrical parameters of Electroconvulsive Therapy (ECT) helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Nurses play a critical role in ECT, including pre-procedure patient education, ensuring informed consent is complete, monitoring vital signs and oxygen saturation during and after the procedure, and providing emotional support.
Post-ECT, the nurse's priority is patient safety. This includes monitoring for respiratory distress, managing post-anesthesia confusion or agitation, and reorienting the patient as they awaken.
The nurse must document the observed seizure duration, any adverse effects, and the patient's response upon recovery.

How to Approach the Question

This is a factual recall question that tests your knowledge of a specific medical procedure's parameters.
First, identify the core subject of the question: Electroconvulsive Therapy (ECT).
Next, focus on the specific parameter being asked about: the typical voltage.
Recall the standard numerical values associated with ECT from your studies.
Compare the standard range (70-120 volts) with the options provided.
Select the option that most accurately reflects this standard clinical parameter.

Concept Tested & Keywords

Concept Tested: Electrical parameters of Electroconvulsive Therapy (ECT)
Stem keywords: electroconvulsive therapy, voltage
Lead-in keywords: typically
Negative lead-in flag: false

Question ID

Q4Zu03eoO5fvdOpErrSBeU

Reference Book

E6 Robert Boland, Marcia L. Verduin - Kaplan and Sadock's Comprehensive Text of Psychiatry-Wolters Kluwer Health (2024) (pp 1-16525 of 16525) p. 11162-11164

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