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FICUS syndrome

Pathophysiology description

2026-01-26
Falcon Model: Edison Scientific Literature 31 citations

Pathophysiology description Current understanding frames FICUS as a multidimensional syndrome comprising psychological, physical, and social impairments in family members during and after a loved one’s ICU admission. It overlaps conceptually with Post-Intensive Care Syndrome–Family (PICS‑F). There is no established molecular or cellular mechanism; rather, observed phenomena reflect stress-related psychological responses, sleep disruption, decision burden, and care-process factors within ICU settings (Sep 2020; https://doi.org/10.4103/ijnmr.ijnmr_243_19; Feb 2024; https://doi.org/10.1038/s41598-024-53968-3) (moradian2020familyintensivecare pages 3-4, kotfis2024thespectrumof pages 1-2, kotfis2024thespectrumof pages 2-3).

Core Pathophysiology - Primary mechanisms: psychosocial stress responses to critical illness of a loved one; sleep disruption; information needs and communication challenges; surrogate decision-making load; exposure to distressing ICU phenomena (e.g., delirium) (Sep 2020; https://doi.org/10.4103/ijnmr.ijnmr_243_19; Feb 2024; https://doi.org/10.1038/s41598-024-53968-3) (moradian2020familyintensivecare pages 5-6, moradian2020familyintensivecare pages 6-7, kotfis2024thespectrumof pages 1-2, kotfis2024thespectrumof pages 2-3). - Dysregulated “pathways”: No canonical molecular pathways identified; rather, validated psychological constructs (anxiety, depression, PTSD symptoms) measured with HADS, IES, and related instruments are used to characterize burden (Feb 2024; https://doi.org/10.1038/s41598-024-53968-3; Apr 2023; https://doi.org/10.1055/s-0043-1769933) (kotfis2024thespectrumof pages 1-2, kotfis2024thespectrumof pages 2-3, gurbuz2023anxietyanddepression pages 2-3). - Affected cellular processes: Not applicable; FICUS is not defined by cellular pathobiology (Sep 2020; https://doi.org/10.4103/ijnmr.ijnmr_243_19) (moradian2020familyintensivecare pages 7-8).

Key Molecular Players - Genes/Proteins (HGNC): None implicated; no genetic etiology has been reported (Sep 2020; https://doi.org/10.4103/ijnmr.ijnmr_243_19) (moradian2020familyintensivecare pages 7-8). - Chemical Entities (ChEBI): Not applicable to etiology or treatment; research focuses on nonpharmacologic, family‑support interventions (Aug 2024; https://doi.org/10.1186/s13063-024-08351-y) (felten2024multicomponentfamilysupport pages 1-2, felten2024multicomponentfamilysupport pages 2-3, felten2024multicomponentfamilysupport pages 10-11). - Cell Types (CL): Not applicable. - Anatomical Locations (UBERON): Not applicable.

Biological Processes (for GO annotation) Because FICUS is not a biological disease entity with molecular pathogenesis, GO biological process annotations are not appropriate. Published work operationalizes FICUS/PICS‑F using psychological symptom instruments (e.g., HADS, IES) rather than cellular or molecular processes (Feb 2024; https://doi.org/10.1038/s41598-024-53968-3; Sep 2020; https://doi.org/10.4103/ijnmr.ijnmr_243_19) (kotfis2024thespectrumof pages 1-2, moradian2020familyintensivecare pages 7-8).

Cellular Components Not applicable; there are no established cellular-localization mechanisms for FICUS (Sep 2020; https://doi.org/10.4103/ijnmr.ijnmr_243_19) (moradian2020familyintensivecare pages 7-8).

Disease Progression - Initial trigger: ICU admission of a loved one; family exposure to high acuity care, uncertainty, and potential end-of-life decisions (Sep 2020; https://doi.org/10.4103/ijnmr.ijnmr_243_19) (moradian2020familyintensivecare pages 3-4, moradian2020familyintensivecare pages 6-7). - Early phase: Elevated anxiety, depression, sleep disturbance, acute stress within 48 hours to days of ICU admission; higher in families of delirious patients (Feb 2024; https://doi.org/10.1038/s41598-024-53968-3) (kotfis2024thespectrumof pages 1-2, kotfis2024thespectrumof pages 2-3). - Subacute phase: Symptoms may persist at 30 days; higher PTSD scores have been observed in families of patients with delirium compared with non-delirium cohorts (mean PTSD score ~11.0 vs ~6.4 at day 30; p<0.001) (Feb 2024; https://doi.org/10.1038/s41598-024-53968-3) (kotfis2024thespectrumof pages 1-2). - Long-term phase: A substantial proportion of family members report persistent psychological symptoms and QoL impairments at 3–12 months after ICU discharge, with dyadic associations to the survivor’s symptoms (Jan 2025; https://doi.org/10.1186/s13613-025-01420-8) (rai2025psychologicalsymptomsquality pages 1-2).

Phenotypic Manifestations - Clinical phenotypes (PICS‑F domain): Anxiety (HADS), depression (HADS), PTSD symptoms (IES/PTSD‑C), sleep disturbance, fatigue, impaired decision-making; prevalence ranges reported include anxiety up to ~70%, depression ~35–70%, and PTSD ~33–54%, with variability across settings and measures (Sep 2020; https://doi.org/10.4103/ijnmr.ijnmr_243_19; Feb 2024; https://doi.org/10.1038/s41598-024-53968-3) (moradian2020familyintensivecare pages 1-2, kotfis2024thespectrumof pages 2-3, moradian2020familyintensivecare pages 3-4). - 2023–2024 quantitative data: - 2023 prospective cohort (Turkey): 84 families; anxiety symptoms in 52.4% and depression in 67.9%; higher odds with nasogastric tube presence and acute illness; greater depression when the patient died in ICU (Apr 2023; https://doi.org/10.1055/s-0043-1769933) (gurbuz2023anxietyanddepression pages 2-3). - 2024 prospective study (Poland): At 30 days, families of delirious patients had higher PTSD scores (IES total; p=0.001) and higher intrusion/hyperarousal than controls; assessments at 48 h and 30 days (Feb 2024; https://doi.org/10.1038/s41598-024-53968-3) (kotfis2024thespectrumof pages 1-2). - 2025 multicenter cohort (Australia): Approximately one‑third of family members had persistent psychological symptoms and QoL problems at 12 months; strong dyadic associations with patient symptoms (Jan 2025; https://doi.org/10.1186/s13613-025-01420-8) (rai2025psychologicalsymptomsquality pages 1-2).

Predictors and Correlates - Demographic/contextual: Female gender, low education, having a critically ill spouse/close relationship, lower resources/support, information deficits, younger age; care-process factors (acute onset illness, higher severity, invasive devices, delirium exposure) (Sep 2020; https://doi.org/10.4103/ijnmr.ijnmr_243_19; Apr 2023; https://doi.org/10.1055/s-0043-1769933; Feb 2024; https://doi.org/10.1038/s41598-024-53968-3) (moradian2020familyintensivecare pages 6-7, gurbuz2023anxietyanddepression pages 2-3, kotfis2024thespectrumof pages 1-2, kotfis2024thespectrumof pages 2-3). - Baseline mental health: Prior anxiety/depression or acute stress increases risk (Sep 2020; https://doi.org/10.4103/ijnmr.ijnmr_243_19) (moradian2020familyintensivecare pages 3-4).

Recent developments and latest research (prioritized 2023–2024) - FICUS Trial (implementation and SAP): A multicomponent, nurse‑led interprofessional family support intervention is being evaluated in a cluster‑randomized superiority trial across 16 ICUs (8 per arm). Primary outcome is family satisfaction with ICU care (FS‑ICU‑24R) at discharge; secondary outcomes include quality of communication (QQPPI‑14), nurse support (ICE‑FPSQ‑14), and longitudinal HADS and IES measures at 3, 6, and 12 months. Recruitment completed January 2024; final follow‑up early 2025. Registered at ClinicalTrials.gov (NCT05280691; registered Feb 20, 2022). Statistical analysis plan specifies LMMs with cluster random effects and visit×treatment interactions; adherence requires ≥5 intervention contacts covering all core components (Aug 2024; https://doi.org/10.1186/s13063-024-08351-y) (felten2024multicomponentfamilysupport pages 1-2, felten2024multicomponentfamilysupport pages 2-3, felten2024multicomponentfamilysupport pages 7-9, felten2024multicomponentfamilysupport pages 10-11). - Observational evidence 2023–2024: Prospective studies quantify high anxiety/depression burdens and show increased PTSD symptoms among families of delirious patients; qualitative work highlights unmet needs and the importance of communication and support (Apr 2023; https://doi.org/10.1055/s-0043-1769933; Feb 2024; https://doi.org/10.1038/s41598-024-53968-3) (gurbuz2023anxietyanddepression pages 2-3, kotfis2024thespectrumof pages 1-2, kotfis2024thespectrumof pages 2-3).

Current applications and real-world implementations - ICU family‑support programs: The FICUS multicomponent intervention operationalizes early engagement, psycho‑educational/relationship‑focused conversations, and structured interprofessional communication/shared decision-making, led by designated family nurses—now being implemented in a multicenter trial with tailored implementation strategies reported in 2023 (Dec 2023; https://doi.org/10.1186/s12913-023-10285-1) (felten2024multicomponentfamilysupport pages 2-3, felten2024multicomponentfamilysupport pages 11-12). - Routine assessment: Use of HADS, IES, and PTSD‑related scales to screen family members for distress within 48 h of ICU admission and in follow‑up, particularly when patients have delirium (Feb 2024; https://doi.org/10.1038/s41598-024-53968-3) (kotfis2024thespectrumof pages 1-2, kotfis2024thespectrumof pages 2-3).

Expert opinions and analysis from authoritative sources - Integrative review: Emphasizes lack of universal definition, the breadth of symptom domains, and need for standardized tools and interventions; positions FICUS within a broader PICS‑F framework and calls for time‑framed prevention and management plans (Sep 2020; https://doi.org/10.4103/ijnmr.ijnmr_243_19) (moradian2020familyintensivecare pages 5-6, moradian2020familyintensivecare pages 7-8). - Contemporary prospective studies with senior PICS/PICS‑F experts: The 2024 Scientific Reports study (co‑authored by E. Wesley Ely) underscores that family members have substantial early and persistent PTSD/anxiety/depression burdens and argues for proactive support strategies (Feb 2024; https://doi.org/10.1038/s41598-024-53968-3) (kotfis2024thespectrumof pages 1-2, kotfis2024thespectrumof pages 2-3).

Relevant statistics and data from recent studies - Anxiety/depression prevalence: 52.4% anxiety and 67.9% depression among family members in a 2023 prospective cohort; odds of anxiety/depression elevated with nasogastric tube and acute illness; higher depression if the patient died in ICU (Apr 2023; https://doi.org/10.1055/s-0043-1769933) (gurbuz2023anxietyanddepression pages 2-3). - PTSD symptom burden: Mean IES‑PTSD higher in families of delirious vs non‑delirious patients at 30 days (11.02 vs 6.42; p<0.001); increases in intrusion and hyperarousal domains observed (Feb 2024; https://doi.org/10.1038/s41598-024-53968-3) (kotfis2024thespectrumof pages 1-2). - Long‑term outcomes: Nearly one‑third of family members report persistent psychological symptoms and QoL impairments at 12 months; strong dyadic associations with survivor symptoms (Jan 2025; https://doi.org/10.1186/s13613-025-01420-8) (rai2025psychologicalsymptomsquality pages 1-2).

Ontology and evidence mappings (knowledge-base style) - Gene/protein annotations (HGNC): None. - Biological processes (GO): Not applicable; no molecular pathway evidence. - Cell type involvement (CL): Not applicable. - Anatomical locations (UBERON): Not applicable. - Chemical entities (CHEBI): Not applicable. - Phenotype associations (HPO): Psychological symptom constructs are measured but not annotated as Mendelian phenotypes; commonly measured domains include Anxiety (HADS‑A), Depression (HADS‑D), and PTSD symptoms (IES), best represented as clinical scales rather than HPO terms (Feb 2024; https://doi.org/10.1038/s41598-024-53968-3; Apr 2023; https://doi.org/10.1055/s-0043-1769933) (kotfis2024thespectrumof pages 1-2, gurbuz2023anxietyanddepression pages 2-3).

Evidence items (with PMIDs/DOIs/URLs and dates) - Moradian et al., 2020 (Integrative review): Family Intensive Care Unit Syndrome lacks a universal definition; symptom domains include anxiety, depression, PTSD, sleep disturbance, stress, fatigue; calls for standardized tools (Published Sep 2020; DOI: 10.4103/ijnmr.ijnmr_243_19; URL: https://doi.org/10.4103/ijnmr.ijnmr_243_19) (moradian2020familyintensivecare pages 1-2, moradian2020familyintensivecare pages 7-8, moradian2020familyintensivecare pages 3-4, moradian2020familyintensivecare pages 5-6, moradian2020familyintensivecare pages 6-7). - Kotfis et al., 2024 (Prospective observational): Families of delirious patients have higher PTSD symptoms at 30 days; outlines use of HADS, IES, PTSD‑C, and links to PICS‑F literature (Published Feb 2024; DOI: 10.1038/s41598-024-53968-3; URL: https://doi.org/10.1038/s41598-024-53968-3) (kotfis2024thespectrumof pages 1-2, kotfis2024thespectrumof pages 2-3, kotfis2024thespectrumof pages 9-10). - Gurbuz & Demir, 2023 (Prospective observational): 52.4% anxiety, 67.9% depression among family members; risk factors include NG tube, higher severity, acute illness, and mortality (Published Apr 2023; DOI: 10.1055/s-0043-1769933; URL: https://doi.org/10.1055/s-0043-1769933) (gurbuz2023anxietyanddepression pages 2-3). - von Felten et al., 2024 (FICUS Trial SAP): Cluster‑randomized trial of a multicomponent, nurse‑led family support intervention; 16 ICU clusters; primary FS‑ICU‑24R; HADS/IES longitudinal assessments; registration NCT05280691; recruitment completed Jan 2024; follow‑up to early 2025 (Published Aug 2024; DOI: 10.1186/s13063-024-08351-y; URL: https://doi.org/10.1186/s13063-024-08351-y) (felten2024multicomponentfamilysupport pages 1-2, felten2024multicomponentfamilysupport pages 2-3, felten2024multicomponentfamilysupport pages 7-9, felten2024multicomponentfamilysupport pages 10-11, felten2024multicomponentfamilysupport pages 11-12). - Rai et al., 2025 (Multicenter longitudinal cohort): Approximately one‑third with persistent psychological symptoms and QoL problems at 12 months; dyadic associations between family and survivor symptoms (Published Jan 2025; DOI: 10.1186/s13613-025-01420-8; URL: https://doi.org/10.1186/s13613-025-01420-8) (rai2025psychologicalsymptomsquality pages 1-2).

Conclusion FICUS syndrome, as used in recent literature, is a psychosocial syndrome affecting families of ICU patients, not a genetic or molecularly defined disease. Mechanistic discussion should focus on psychological stress, communication/decision challenges, and care-process exposures such as delirium, rather than molecular pathways. Contemporary research emphasizes standardized assessment, targeted family-support interventions (e.g., the ongoing FICUS trial), and longitudinal monitoring of anxiety, depression, PTSD symptoms, and QoL. No MONDO/OMIM/Orphanet entries or gene/protein/cellular mechanisms are currently supported by the evidence base (Sep 2020; https://doi.org/10.4103/ijnmr.ijnmr_243_19; Aug 2024; https://doi.org/10.1186/s13063-024-08351-y; Feb 2024; https://doi.org/10.1038/s41598-024-53968-3) (moradian2020familyintensivecare pages 7-8, felten2024multicomponentfamilysupport pages 1-2, kotfis2024thespectrumof pages 1-2, kotfis2024thespectrumof pages 2-3).

References

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  2. (moradian2020familyintensivecare pages 7-8): SeyedTayeb Moradian, Yaser Saeid, MohammadMahdi Salaree, and Abbas Ebadi. Family intensive care unit syndrome: an integrative review. Iranian Journal of Nursing and Midwifery Research, 25:361-368, Sep 2020. URL: https://doi.org/10.4103/ijnmr.ijnmr_243_19, doi:10.4103/ijnmr.ijnmr_243_19. This article has 54 citations and is from a poor quality or predatory journal.

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  13. (rai2025psychologicalsymptomsquality pages 1-2): Sumeet Rai, Dale M. Needham, Rhonda Brown, Teresa Neeman, Krishnaswamy Sundararajan, Arvind Rajamani, Rakshit Panwar, Mary Nourse, Frank M. P. van Haren, and Imogen Mitchell. Psychological symptoms, quality of life and dyadic relations in family members of intensive care survivors: a multicentre, prospective longitudinal cohort study. Annals of Intensive Care, Jan 2025. URL: https://doi.org/10.1186/s13613-025-01420-8, doi:10.1186/s13613-025-01420-8. This article has 8 citations and is from a peer-reviewed journal.

  14. (felten2024multicomponentfamilysupport pages 7-9): Stefanie von Felten, Miodrag Filipovic, Marie-Madlen Jeitziner, Lotte Verweij, Marco Riguzzi, and Rahel Naef. Multicomponent family support intervention in intensive care units: statistical analysis plan for the cluster-randomized controlled ficus trial. Trials, Aug 2024. URL: https://doi.org/10.1186/s13063-024-08351-y, doi:10.1186/s13063-024-08351-y. This article has 3 citations and is from a peer-reviewed journal.

  15. (felten2024multicomponentfamilysupport pages 11-12): Stefanie von Felten, Miodrag Filipovic, Marie-Madlen Jeitziner, Lotte Verweij, Marco Riguzzi, and Rahel Naef. Multicomponent family support intervention in intensive care units: statistical analysis plan for the cluster-randomized controlled ficus trial. Trials, Aug 2024. URL: https://doi.org/10.1186/s13063-024-08351-y, doi:10.1186/s13063-024-08351-y. This article has 3 citations and is from a peer-reviewed journal.

  16. (kotfis2024thespectrumof pages 9-10): Katarzyna Kotfis, Patrycja Maj, Aleksandra Szylińska, Maria Pankowiak, Elżbieta Reszka, E. Wesley Ely, and Annachiara Marra. The spectrum of psychological disorders in family members of patients suffering from delirium associated with critical illness: a prospective, observational study. Scientific Reports, Feb 2024. URL: https://doi.org/10.1038/s41598-024-53968-3, doi:10.1038/s41598-024-53968-3. This article has 12 citations and is from a peer-reviewed journal.