Neuroanesthesia & neurocritical care

Visualizing the burden of brain tissue hypoxia and metabolic dysfunction assessed by multimodal neuromonitoring in subarachnoid hemorrhage patients: the TITAN study

Intensive Care MedPublished Retrospective cohort study

Authors' conclusion

In this study, low PbtO2 and metabolic insults were more prevalent among SAH patients with unfavorable long-term neurological outcome at 6 months.

Study context

Population
Subarachnoid hemorrhage (SAH) patients admitted to 5 neurocritical care units requiring invasive multimodal neuromonitoring
Participants
232 patients
Outcome
Neurological outcome (Glasgow Outcome Scale (GOS)) in relation to episodes of low PbtO2 and elevated lactate pyruvate ratio (LPR, cerebral microdialysis)
Follow-up
6 months
Methodological detailsmulticentre, Median 117 (IQR 77-154) h of monitoring per patient
  • Multicentre
  • Median 117 (IQR 77-154) h of monitoring per patient

Main finding

As reported in the abstract

Unfavorable neurological outcome (GOS 1-3) at 6 months
  • Combined episodes of low PbtO2 and elevated LPR prevalent in patients with unfavorable neurological outcome
  • Association less evident with isolated low PbtO2 or isolated elevated LPR
  • Cumulative PbtO2/LPR burden independently associated with unfavorable neurological outcome (multivariate model)

Observational data: associations, not effects.

Original publication

Visualizing the burden of brain tissue hypoxia and metabolic dysfunction assessed by multimodal neuromonitoring in subarachnoid hemorrhage patients: the TITAN study. Intensive Care Med. Published 22 April 2025. doi:10.1007/s00134-025-07888-z

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