From equipment availability to effective organ support: critical care capacity and capability for the future of intensive care

Intensive care unit (ICU) bed and equipment counts describe installed resources but can overstate the support available to patients. Reliable organ support also requires infrastructure, staff, supplies, maintenance and clinical coordination. This Perspective defines effective organ-support capacity as the amount of clinically appropriate support a service can reliably deliver over a specified period, given its clinical capability and available resources. It distinguishes capacity from readiness, capability, observed quality of care and the contextual conditions influencing access and delivery. Five features describe this capacity: it is dynamic, multidisciplinary, longitudinal, context-sensitive and outcome-oriented. Six enabling conditions support organ-support delivery, including staffing, monitoring, governance and continuity. The framework is intended primarily for facility teams undertaking quality improvement and operational planning. Candidate indicators are linked to published measurement precedents, with explicit separation of established measures from proposed extensions. A hypothetical ventilation example illustrates data collection, interpretation and action. A staged validation agenda addresses feasibility, reliability, validity and the risks of premature comparison. Reporting deliverable organ support alongside equipment inventories could improve critical care planning. The framework remains a conceptual proposal; its indicators require testing before accreditation or comparisons between services.