RecruitingNCT07568158

Intraoperative Cognitive Load in Anesthesia Nurses Across Anesthetic Phases

Carga Cognitiva Intraoperatoria Del Enfermero/a de Anestesia Según la Fase Del Acto Anestésico: Estudio Observacional Con NASA-TLX

Sponsor

Hospital Clinic of Barcelona

Enrollment

50 participants

Start Date

Jun 1, 2026

Study Type

OBSERVATIONAL

Conditions

Performance Patient Safety Perioperative Cognitive Load Alarm Fatigue Cognitive Load, Performance

Summary

The goal of this observational study is to measure the cognitive load (mental effort) of anesthesia nurses during real surgical procedures at Hospital Clínic de Barcelona, Spain. The main questions it aims to answer are: * Does cognitive load vary across the three phases of anesthetic care (induction, maintenance, and emergence/recovery)? * Is cognitive load higher during general anesthesia than during spinal anesthesia with sedation? * How do surgical specialty and patient complexity relate to cognitive load? * How does monitor alarm perception relate to cognitive load during surgery? Participants (anesthesia nurses) will complete the NASA Task Load Index (NASA-TLX) questionnaire - a validated 6-item tool measuring mental effort - three times per surgical case: after induction or spinal block, during maintenance, and after patient awakening or sedation reversal. They will also answer 4 brief questions about alarm management at the end of each case. No changes are made to clinical care. Participation adds approximately 11 minutes per surgical case.

Eligibility

Min Age: 18 Years

Inclusion Criteria6

Registered nurse anesthetist actively working at Hospital Clínic de Barcelona.
Minimum 3 months in the current anesthesia nursing position.
Voluntary participation with signed informed consent.
Scheduled surgery (including deferred urgent surgery) or solid organ transplantation.
General anesthesia (endotracheal intubation or laryngeal mask airway) or spinal anesthesia with sedation.
Minimum duration of 30 minutes.

Exclusion Criteria7

Refusal to participate or withdrawal of informed consent.
Spinal anesthesia without sedation.
Exclusive regional anesthesia without sedation.
Sedation alone without regional technique.
Duration less than 30 minutes.
Cases involving an unexpected intraoperative emergency requiring urgent additional personnel.
Cases started under spinal anesthesia converted to general anesthesia for any clinical or technical reason.

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Interventions

OTHERNASA Task Load Index (NASA-TLX)

The Raw NASA Task Load Index (NASA-TLX) is a validated self-report questionnaire measuring subjective cognitive load across six dimensions: mental demand, physical demand, temporal demand, performance, effort, and frustration (scale 0-100). Administered three times per surgical case (T1, T2, T3) by the participating anesthesia nurse. Additionally, four questions about monitor alarm perception and management are completed after T3.