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Moderate and severe traumatic brain injury — Clinical Guidelines

Overview

Moderate and severe traumatic brain injury (TBI) involves significant neurological compromise, often requiring intensive care management to address intracranial pressure, systemic inflammation, and potential organ dysfunction. 1 2 4 6 7

Diagnosis

Clinical Assessment: Includes Glasgow Coma Scale (GCS) scoring for severity grading (moderate: 9-12, severe: ≤8) 1.

Imaging: CT or MRI to identify structural brain injuries, hematoma, contusions, and edema 1.

Laboratory Tests: Elevated plasma mitochondrial DNA DAMPs may correlate with worse outcomes 4.

Immune Response Markers: Reduced HLA-DR expression on monocytes and decreased TNFalpha synthesis post-injury indicate compromised immune function 6.

Cytokine Levels: Increased plasma TNF-α, IL-6, and IL-8 levels correlate with injury severity and organ damage 7.

Management

Sedation: Light protocolized sedation preferred over deep sedation based on general ICU evidence; specific protocols for TBI lacking robust RCT support 2.

Intracranial Pressure (ICP) Management: Use of ICP monitoring devices and interventions like decompressive craniectomy for refractory elevated ICP 1.

Supportive Care: Mechanical ventilation with careful extubation timing; ICU and hospital LOS may be shortened during pandemics without compromising outcomes 1.

Immunomodulation: Monitor immune response post-surgery; major surgeries may further depress immune function 6.

Palliative Care: Consider palliative sedation in patients with poor prognosis, ensuring ethical and legal safeguards are in place 5.

Special Populations

Pediatrics: Extravascular lung water (EVLW) levels can predict multiple organ failure in severe burn injury pediatric patients, though not directly related to TBI 3.

Comorbidities: Immune response modulation is crucial in patients with additional injuries requiring surgical intervention 6.

Key Recommendations

Implement light protocolized sedation in neurocritical care units for TBI patients to avoid unnecessary deep sedation (Evidence: Moderate) 2.

Monitor and manage intracranial pressure aggressively, including timely decompressive craniectomy when indicated (Evidence: Expert opinion) 1.

Consider the impact of surgical interventions on immune function in severely injured patients requiring additional surgeries (Evidence: Moderate) 6.

Utilize biomarkers like plasma mitochondrial DNA DAMPs and cytokine levels to guide prognosis and management strategies (Evidence: Moderate) 4 7.

Approach palliative sedation ethically, ensuring communication with families and adherence to legal frameworks in treatment limitation decisions (Evidence: Expert opinion) 5.

References

1 Lin V, Lele AV, Fong CT, Jannotta GE, Livesay S, Sharma M et al.. Impact of COVID-19 on neurocritical care delivery and outcomes in patients with severe acute brain injury - Assessing the initial response in the first US epicenter. Journal of clinical neuroscience : official journal of the Neurosurgical Society of Australasia 2022. link 2 Opdenakker O, Vanstraelen A, De Sloovere V, Meyfroidt G. Sedatives in neurocritical care: an update on pharmacological agents and modes of sedation. Current opinion in critical care 2019. link 3 Lekmanov AU, Azovskiy DK, Pilyutik SF, Abramova VM. EXTRAVASCULAR LUNG WATER IS A PREDICTOR OF DEVELOPMENT OF MULTIPLE ORGAN FAILURE IN CHILDREN WITH SEVERE BURN INJURY. Anesteziologiia i reanimatologiia 2017. link 4 Simmons JD, Lee YL, Mulekar S, Kuck JL, Brevard SB, Gonzalez RP et al.. Elevated levels of plasma mitochondrial DNA DAMPs are linked to clinical outcome in severely injured human subjects. Annals of surgery 2013. link 5 Baumann A, Claudot F, Audibert G, Mertes PM, Puybasset L. The ethical and legal aspects of palliative sedation in severely brain-injured patients: a French perspective. Philosophy, ethics, and humanities in medicine : PEHM 2011. link 6 Flohé S, Lendemans S, Schade FU, Kreuzfelder E, Waydhas C. Influence of surgical intervention in the immune response of severely injured patients. Intensive care medicine 2004. link 7 Jiang JX, Tian KL, Chen HS, Zhu PF, Wang ZG. Plasma cytokines and endotoxin levels in patients with severe injury and their relationship with organ damage. Injury 1997. link00057-0)

Moderate and severe traumatic brain injury