Intensive Care

Summary

Intensive care is a specialised domain of hospital medicine dedicated to patients with life-threatening organ dysfunction or at high risk for rapid deterioration. These patients often require continuous physiological monitoring, advanced organ support (mechanical ventilation, vasopressors, renal replacement therapy) and rapid, protocolised interventions. Care is delivered by multidisciplinary teams—intensivists, critical care nurses, respiratory therapists, pharmacists and allied staff—working within either “closed” units under dedicated critical-care leadership or “open” models shared by multiple specialties. Key pillars include prevention of iatrogenic harm (ventilator-associated pneumonia, catheter-related infection, stress ulcers, thromboembolism), daily assessment of sedation and readiness for liberation from organ support, and early mobilisation and nutrition. In resource-limited settings, context-adapted strategies—simplified monitoring, task-sharing, low-tech supportive techniques—can markedly improve survival. Globally, intensive care remains essential for managing sepsis, acute respiratory failure, shock states and complex postoperative and trauma patients, with growing emphasis on personalised physiologic targets, digital decision-support and integration of palliative and rehabilitative pathways.

Research from Nature Portfolio

Recent work has demonstrated the promise of data-driven continuous monitoring in paediatric intensive care. A novel “Patient Vital Status” score, computed from age-normed heart rate, blood pressure, respiratory rate, oxygen saturation and temperature, reliably distinguished systemic inflammatory episodes and sepsis in critically ill children, offering a standardised early warning tool. In adult cardiac patients, cardiovascular magnetic resonance has enabled non-invasive assessment of pulmonary artery stiffness across heart-failure phenotypes, revealing markedly reduced vascular compliance in both reduced and preserved ejection fraction groups and correlating with biomarkers of cardiac stress. In neurocritical care, studies of reduced-lead EEG montages have shown that high-sensitivity detection of seizure patterns can be retained using eight-channel configurations, supporting rapid bedside deployment when full electrode arrays are impractical.

Research from all publishers

Sex-specific analyses of large sepsis cohorts have uncovered modest but significant differences in outcomes: men exhibit higher in-hospital mortality and greater long-term morbidity after critical-care sepsis, with age and infection source modulating this effect. Hypophosphatemia has emerged as an independent risk factor in general and critical-care populations, with low serum phosphate on admission or rapid phosphate shifts associated with increased mortality, longer ventilator dependence and prolonged ICU stays, highlighting the need for vigilant electrolyte monitoring. Intrahospital transport of unstable patients—often for imaging or procedural interventions—continues to carry risk, but implementation of graded transport teams, structured safety checklists and a validated transport-safety scale has reduced adverse events and, in some systems, shown comparable or even improved outcomes for capacity-driven ICU transfers.

Intensive Care publication trend

The graph below shows the total number of articles in intensive care across all publications each year (not limited to Nature Index journals).

Technical terms

Intensive care unit (ICU): A hospital ward providing advanced, continuous life-support and monitoring for critically ill patients.
Mechanical ventilation: Use of a ventilator to deliver controlled breaths when spontaneous respiration fails.
Vasopressor support: Intravenous medications that raise blood pressure by constricting blood vessels, used in shock.
Hypophosphatemia: A serum phosphate concentration below normal (<0.8 mmol/L), often linked to muscle weakness and delayed weaning.
Patient Vital Status (PVS): A composite score quantifying physiological derangement based on vital-sign deviations from age-specific norms.
Intrahospital transport: The movement of critically ill patients within a hospital for diagnostics or treatment, requiring specialised protocols.

References

  1. Continuous monitoring of physiological data using the patient vital status fusion score in septic critical care patients. Scientific Reports (2024).
  2. Noninvasive evaluation of pulmonary artery stiffness in heart failure patients via cardiovascular magnetic resonance. Scientific Reports (2023).
  3. Effects of a reduction of the number of electrodes in the EEG montage on the number of identified seizure patterns. Scientific Reports (2022).
  4. Influence of gender on age-associated in-hospital mortality in patients with sepsis and septic shock: a prospective nationwide multicenter cohort study. Critical Care (2023).
  5. Impact of hypophosphatemia on outcome of patients in intensive care unit: a retrospective cohort study. BMC Anesthesiology (2019).
  6. Association of serum phosphate and changes in serum phosphate with 28-day mortality in septic shock from MIMIC-IV database. Scientific Reports (2023).
  7. Effectiveness of the graded transport mode for the intrahospital transport of critically ill patients: A retrospective study. Frontiers in Public Health (2023).
  8. Reliability and validity assessment of the Chinese version of the Intrahospital Transport Safety Scale (IHTSS) in intensive care units. BMC Nursing (2024).
  9. Unit-to-unit transfer due to shortage of intensive care beds in Sweden 2015–2019 was associated with a lower risk of death but a longer intensive care stay compared to no transfer: a registry study. Journal of Intensive Care (2024).

About these summaries

This Nature Research Intelligence Topic summary is created with the cited references and a large language model. We take care to ground generated text with facts, and have systems in place to gain human feedback on the overall quality of the process in line with our AI principles. We strive to create accurate and useful summaries for people unfamiliar with the research topic and that supports this goal. These pages are a beta release and will be updated as we learn how best to help people gain value from a research topic summary.

Nature Strategy Reports
Turn complex research questions into confident strategic decisions 

When you're under pressure to set direction, justify investment, or understand your competitive position, you need more than raw data — you need trusted insights you can act on.

  • Benchmark your performance against global peers using robust, methodologically sound analysis.

  • Combine quantitative metrics with qualitative expert insight to uncover strengths, gaps and emerging opportunities.

  • Gain tailored, decision-ready recommendations aligned to your strategic priorities.

Talk to us to learn more about our data dashboards and bespoke strategy reports.

Get Started
Nature Masterclasses
Grow research skills, confidence and careers with training built for every stage of the research lifecycle.

Developed with Nature Portfolio journal Editors and internationally renowned experts. Discover three ways to learn:

  • Self-paced, online courses in convenient bite-sized units, covering key skills across scientific writing, publishing, grant writing, data analysis, and more.

  • Expert trainer-led workshops with hands-on exercises and real-time feedback across core research skills, delivered via interactive group sessions.

  • Editor-led workshops combining core principles in writing and publishing, personalised 1:1 feedback from Nature Portfolio Editors and hands-on exercises.

Explore course catalogues and workshop agendas, enquire about the options or request institutional pricing.

Learn more