Brain tissue pO₂and outcome after severe head injury

Jim Dings; Andreas Jäger; Jürgen Meixensberger; K. Roosen

doi:10.1080/01616412.1998.11740614

January 1, 1998Neurological Research

Brain tissue pO₂and outcome after severe head injury

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Key Points

To determine whether continuous brain tissue oxygen monitoring predicts six-month clinical outcomes and validates the critical hypoxia threshold of 10 mmHg in severe head trauma.
Monitored brain tissue oxygen tension (ti-pO2) in N=35 severe head injury patients within 40 hours post-injury using probes positioned in CT-normal tissue.
Stratified patients into good outcome (Glasgow Outcome Scale 4–5, n=17) and bad outcome (Glasgow Outcome Scale 1–3, n=18) cohorts evaluated at 6 months post-injury.
Patients with bad outcomes spent 35.5% of the first 24 hours at ti-pO2 < 10 mmHg compared to 10.6% in the good outcome group, reflecting significant early hypoxia (p=0.013 for 0–24 h; p=0.036 for 0–48 h).
Elevated brain oxygen levels (ti-pO2 ≥ 50 mmHg) occurred more frequently in the bad outcome cohort, primarily developing 48 to 72 hours post-injury.
Monitoring began earlier in the bad outcome group (14.2 ± 9.1 hours post-injury vs. 17.7 ± 9.1 hours; p < 0.05), while age and initial Glasgow Coma Scores did not differ significantly between groups.

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Implication

Observational study reveals that early brain hypoxia correlates with poor recovery in severe head injury, indicating the prognostic value of direct tissue oxygen monitoring.

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Dings et al. (1998) studied this question.

synapsesocial.com/papers/6a85ad8ed1e5e0588dd4f128 https://doi.org/10.1080/01616412.1998.11740614

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Brain tissue pO₂and outcome after severe head injury

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Brain tissue pO₂and outcome after severe head injury

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