--- title: Effects of Repeated Electroconvulsive Therapy Sessions on Anesthetic Requirements nct_id: NCT07418463 overall_status: NOT_YET_RECRUITING sponsor: Izmir City Hospital study_type: OBSERVATIONAL primary_condition: Electroconvulsive Therapy countries: Turkey (Türkiye) canonical_url: "https://parkinsonspathways.com/agent/trials/NCT07418463.md" clinicaltrials_gov: "https://clinicaltrials.gov/study/NCT07418463" ct_last_update_post_date: 2026-02-18 last_seen_at: "2026-05-12T07:25:32.284Z" source: ClinicalTrials.gov (mirrored, no enrichment) --- # Effects of Repeated Electroconvulsive Therapy Sessions on Anesthetic Requirements **Official Title:** Effects of Repeated Electroconvulsive Therapy on Anesthetic Requirements: A Prospective Observational Study **NCT ID:** [NCT07418463](https://clinicaltrials.gov/study/NCT07418463) ## Key Facts - **Status:** NOT_YET_RECRUITING - **Study Type:** OBSERVATIONAL - **Target Enrollment:** 35 - **Lead Sponsor:** Izmir City Hospital - **Conditions:** Electroconvulsive Therapy - **Start Date:** 2026-03-15 - **Completion Date:** 2026-06-15 - **CT.gov Last Update:** 2026-02-18 ## Brief Summary Electroconvulsive therapy (ECT) is an effective treatment for severe depression and other psychiatric disorders. ECT is usually given in several sessions on different days. During each session, patients receive short-acting anesthesia to ensure comfort and safety. This study aims to evaluate whether the amount of anesthetic medication required changes during repeated ECT sessions in the same patient. In addition, the study will examine the relationship between anesthetic dose, seizure duration, seizure quality (measured by postictal suppression index), and recovery time. This is a prospective observational study. All anesthesia and ECT procedures will be performed according to routine clinical practice. No additional intervention will be applied for research purposes. ## Detailed Description Electroconvulsive therapy (ECT) is a well-established biological treatment for treatment-resistant depression and other affective disorders. Adequate anesthesia is essential to ensure patient safety while maintaining optimal seizure quality and therapeutic efficacy. Short-acting anesthetic agents are commonly used in ECT due to their favorable recovery profiles and hemodynamic stability. Previous studies suggest that anesthetic requirements may change across repeated ECT sessions, potentially influencing seizure duration, seizure quality, and recovery time. However, evidence regarding within-patient changes in anesthetic dose requirements and their relationship with electroencephalographic seizure characteristics remains limited. This prospective observational cohort study aims to evaluate changes in anesthetic requirements during repeated ECT sessions in adult patients. Secondary objectives include examining the association between anesthetic dose, seizure duration (motor and EEG), postictal suppression index (PSI), and recovery time. All ECT and anesthesia procedures will be conducted according to institutional routine clinical protocols. The research team will not interfere with clinical decision-making. Data will be collected from anesthesia records and EEG documentation. Mixed-effects statistical models will be used to account for repeated within-subject measurements. ## Eligibility - **Minimum age:** 18 Years - **Maximum age:** 65 Years - **Sex:** ALL - **Healthy Volunteers:** No ``` Inclusion Criteria: Age 18 to 65 years. Scheduled to undergo electroconvulsive therapy (ECT) under elective conditions as part of routine clinical care. ECT indication (e.g., major depressive disorder, bipolar depression, schizoaffective disorder, catatonia). ASA Physical Status I-III. Planned to receive multiple ECT sessions. Able to provide written informed consent (participant and/or legally authorized representative). Exclusion Criteria: Use of antiepileptic drugs or benzodiazepines that may affect seizure threshold. ECT received within the past 6 months. Severe cardiovascular, pulmonary, or neurologic comorbidity (investigator judgment). Pregnancy or breastfeeding. ASA Physical Status IV or higher. Acute substance or alcohol use disorder/intoxication. Conditions preventing EEG monitoring (e.g., scalp trauma, significant skin lesions, cranial implants). Inability to obtain reliable BIS monitoring during anesthesia induction due to technical limitations. ``` ## Arms - **Adults Undergoing Repeated ECT** — Adult patients aged 18-65 years with an indication for electroconvulsive therapy (ECT) who are scheduled to undergo multiple ECT sessions under routine clinical practice. All anesthesia and ECT procedures will be performed according to standard institutional protocols. No additional intervention will be applied for research purposes. Repeated within-subject measurements will be collected across ECT sessions. ## Interventions - **Electroconvulsive Therapy (ECT)** (PROCEDURE) — Electroconvulsive therapy administered as part of routine clinical care. The study does not assign or modify the intervention. Anesthetic management and ECT parameters are determined by treating physicians according to standard institutional protocols. ## Primary Outcomes - **Change in Anesthetic Dose Requirement Across Repeated ECT Sessions** _(time frame: Across the first 4 ECT sessions per participant (from Session 1 to Session 4), during the study period (up to 3 months).)_ — Dose (mg) of the anesthetic agent administered for each ECT session (e.g., propofol or etomidate), recorded from anesthesia records and analyzed as within-subject change across sequential sessions. ## Locations (1) - Izmir City Hospital, Izmir, Turkey (Türkiye) ## Recent Field Changes (last 30 days) - `status.overallStatus` — added _(2026-05-12)_ - `status.primaryCompletionDate` — added _(2026-05-12)_ - `status.completionDate` — added _(2026-05-12)_ - `status.lastUpdatePostDate` — added _(2026-05-12)_ - `design.enrollmentCount` — added _(2026-05-12)_ - `eligibility.criteria` — added _(2026-05-12)_ - `eligibility.minAge` — added _(2026-05-12)_ - `eligibility.maxAge` — added _(2026-05-12)_ - `eligibility.sex` — added _(2026-05-12)_ - `outcomes.primary` — added _(2026-05-12)_ - `armsInterventions.arms` — added _(2026-05-12)_ - `armsInterventions.interventions` — added _(2026-05-12)_ - `sponsor.lead` — added _(2026-05-12)_ - `results.hasResults` — added _(2026-05-12)_ - `locations.izmir city hospital|izmir||turkey (türkiye)` — added _(2026-05-12)_ --- *Canonical: https://parkinsonspathways.com/agent/trials/NCT07418463.md* *Source data (authoritative): https://clinicaltrials.gov/study/NCT07418463* *This page is a raw mirror with no AI summary, no editorial enrichment, and no Parkinson's-specific filtering.*