Structured video calls for delirium prevention in the intensive care unit with family members

INTERVENTION: Group 1: Patients in the intervention group receive structured daily video calls with a family member, in addition to standard intensive care treatment. The video calls take place throughout the duration of the ICU stay, with a planned maximum duration of 20 minutes per call at a fixed time of day (between 5 pm and 8 pm). Calls follow a structured protocol including, for example, reorientation, familiar voice contact, and personally meaningful content. Group 2: Patients in the control group receive standard intensive care treatment without a structured video‐call protocol. Contact with family members follows the ward's usual visiting and communication practices. CONDITION: ; F05 Delirium, not induced by alcohol and other psychoactive substances PRIMARY OUTCOME: Recruitment rate, proportion of completed vs. planned video calls, dropout rate, acceptability SECONDARY OUTCOME: Delirium incidence INCLUSION CRITERIA: Expected ICU length of stay > 48 hours RASS (Richmond Agitation‐Sedation Scale) ‐2 to +3 No active delirium at study enrollment Sufficient German language proficiency Availability of a family member able to provide consent Availability of a private video‐call‐capable device (also on the family member's side)