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Electroconvulsive Therapy (ECT)

Anesthesia Implications
Position : Supine
Time : 5-30 min (very short)
Blood Loss : Zero
Maintenance Paralytic : Yes

Anesthetic Approaches

1General, Ambu/mask Ventilation
The Anesthesia:

Be prepared - Keep LMA and ETT available at bedside if needed. Have oral or nasal airway readily available Induction - A quick acting anesthetic (Brevitol) and paralytic (succinylcholine) is given on induction. If the patient is anticipated to have a short (sub-therapeutic) seizure, you'll also be giving caffeine at this junction to prolong the seizure. After giving Brevitol, obtain a baseline EEG before administering succinylcholine. Then hyperventilate using the mask/ambu bag to decrease CO2. This will hyperoxygenate the patient. Sympathetic Response - Electro-stimulation of the brain will produce a brief parasympathetic response, and then a more prolonged sympathetic response. Esmolol (20-50 mg) and/or labeolol (5-15 mg) is typically given directly after induction. Bite Block - After induction, place a rubber or foam bite block before electro-stimulation. Get Clear - After induction and placement of the bite block, get clear of the patient to avoid shock. Post-seizure - Resume airway management and assist the patient back to spontaneous ventilation. Continue to monitor for hypo or hypertension, bradycardia (rare), tachycardia (most common), or any dysrhythmia. Have all emergency drugs at bedside. Common medication lineup - Bevitol (0.75-1.5 mg/kg), Succinylcholine (0.3-1 mg/kg), Robinul (0.2 - 0.4 mg) OR Atropine, Caffeine (120-600 mg), Esmolol (20-50 mg) and/or labeolol (5-15 mg).

The Surgery:

ECTs (Electroconvulsive Therapy) is typically indicated for for the relief of Major Depressive Disorder (MDD) or other mental disorders that have not responded to traditional medical treatment. The procedure involves sending an electrical current through the brain which causes a brief seizure. The actual duration of the seizure is determined by the surgeon, but generally anticipate a longer duration if previous induced seizures were sub-therapeutic.

Additional Notes:

Absolute Contraindications - Recent craniotomy, recent MI (less than 3 months ago), recent stroke (less than 1 month ago), Intracranial mass, and increased ICP. Relative Contraindications - angina, CHF, significant pulmonary disease, bone fractures, osteoporosis, pregnancy, glaucoma, and retinal damage Consult - Patients with COPD, CHF, unstable angina, and glaucoma are at increased risk for complications during ECT. The anesthesia provider should consult with the patient’s doctors following these conditions. Post-seizure myalgia - Patients are likely to have post-succinylcholine myalgia pain.


Reference

Pinkhasov. Pretreatment With Caffeine Citrate to Increase Seizure Duration During Electroconvulsive Therapy: A Case Series. 2016.
Ward. Recommendations for the use of ECT in pregnancy: literature review and proposed clinical protocol. 2018.