Michelle Biros, MD Evaluation & Management of Severe Traumatic Brain Injury Patients with Suspected Elevated ICP.

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Presentation transcript:

Michelle Biros, MD Evaluation & Management of Severe Traumatic Brain Injury Patients with Suspected Elevated ICP

Michelle Biros, MD FERNE Brain Illness and Injury Course

Michelle Biros, MD 4 th Mediterranean Emergency Medicine Congress Sorrento, Italy September 17, th Mediterranean Emergency Medicine Congress Sorrento, Italy September 17, 2007

Michelle Biros, MD Michelle Biros, MD, MS Professor Department of Emergency Medicine Hennepin County Medical Center and University of Minnesota Minneapolis, Minnesota

Michelle Biros, MD Objectives Discuss key concepts in ED management of severe TBIDiscuss key concepts in ED management of severe TBI Review the 2007 Brain Trauma Foundation (BTF) recommendations on acute management of elevated ICPReview the 2007 Brain Trauma Foundation (BTF) recommendations on acute management of elevated ICP

Michelle Biros, MD Severe TBI: Case Presentation 18 year old, struck on head 18 year old, struck on head Agitated at the sceneAgitated at the scene GCS score = 8GCS score = 8 En route, decompensatesEn route, decompensates On ED arrival, decerebrate posturingOn ED arrival, decerebrate posturing

Michelle Biros, MD Key Clinical Questions What are key considerations for the ED management severe TBI? Who is at risk for elevated ICP? What is appropriate ED management of apparent elevated ICP?

Michelle Biros, MD Blood Pressure What is known One epsiode of SBP< 90 mm increases morbidity and doubles mortality One epsiode of SBP< 90 mm increases morbidity and doubles mortality Repeated episodes increse risk Repeated episodes increse risk Correcting BP is associated with improved outcomes Correcting BP is associated with improved outcomes What is not known Best target values Best target values

Michelle Biros, MD Oxygenation What is known Desaturation occurs often in HT and during intubation Desaturation occurs often in HT and during intubation A single episode of hypoxia worsens A single episode of hypoxia worsens morbidity and mortality morbidity and mortality What is not known Level of hypoxia that correlates with poor outcome Level of hypoxia that correlates with poor outcome

Michelle Biros, MD BP and Oxygenation 2007 BTF Recommendations Level II- BP should be monitored and hypotension ( SBP < 90 mm) avoided Level III- oxygenation should be monitored and hypoxia ( paO 2 < 60 mm ) avoided

Michelle Biros, MD Who is at risk for elevated ICP? 2007 BTF on ICP monitoring Level II Severe TBI ( GCS Score 3-8 after resuscitation), and abnormal CT scan Severe TBI ( GCS Score 3-8 after resuscitation), and abnormal CT scan Level III Normal CT and two or more – Normal CT and two or more – Age >40; motor posturing; SBP 40; motor posturing; SBP<90mm

Michelle Biros, MD Emergent Management of ICP Hyperosmolar Agents Mannitol Mannitol Hypertonic saline Hypertonic salineHyperventilation

Michelle Biros, MD Mannitol Has beneficial effects on ICP,CCP and brain metabolism Two possible mechanisms Two possible mechanisms Immediate plasma volume expansion Delayed osmotic effects Risky in certain patients Hypotension, sepsis, renal disease Hypotension, sepsis, renal disease

Michelle Biros, MD Hypertonic Saline Many possible benefits May create an osmotic gradient across the intact BBB, reducing cerebral water content May create an osmotic gradient across the intact BBB, reducing cerebral water content Dehydrates endothelial cells, thus increasing vessel diameter Dehydrates endothelial cells, thus increasing vessel diameter Expands plasma volume Expands plasma volume

Michelle Biros, MD Hypertonic Saline %; case series or small studies Some possible adverse events Central Pontine Myelinolysis if previous hyponatremia Central Pontine Myelinolysis if previous hyponatremia Hypernatremia and hyperosmolality Hypernatremia and hyperosmolality Pulmonary edema if preexisting cardiac/ pulmonary disease Pulmonary edema if preexisting cardiac/ pulmonary disease

Michelle Biros, MD Hyperventilation What is known Reduces ICP by vasoconstriction and subsequent reduced CBF Reduces ICP by vasoconstriction and subsequent reduced CBF CBF is already reduced in TBI CBF is already reduced in TBI If too aggressive, may cause cerebral ischemia If too aggressive, may cause cerebral ischemia What is not known Does short term hyperventilation change outcome?

Michelle Biros, MD Emergent ICP Management 2007 BTF Recommendations Level II- Mannitol ( gr/kg) is effective in reducing elevated ICP Avoid arterial hypotension Avoid arterial hypotension Level III- Use mannitol only for herniation or progressive deterioration

Michelle Biros, MD Emergent ICP Management Level II Prophylactic hyperventilation not recommended Prophylactic hyperventilation not recommended Level III Use only as a temporizing measure Use only as a temporizing measure If possible, avoid in first 24 hours If possible, avoid in first 24 hours Monitor O2 delivery with SjO 2 or PbrO 2 Monitor O2 delivery with SjO 2 or PbrO 2 Current evidence not strong enough for recommendations on HTS

Michelle Biros, MD Seizure Prophylaxis What is known; Seizures may precipitate adverse events increase ICP, BP, neurotransmitters increase ICP, BP, neurotransmitters decrease BP, oxygen delivery decrease BP, oxygen delivery Patients at risk GCS Score<10 GCS Score<10 Contusions, SDH, EDH, ICH Contusions, SDH, EDH, ICH Depressed skull fracture, penetrating HT Depressed skull fracture, penetrating HT Seizure within 24 hrs of injury Seizure within 24 hrs of injury

Michelle Biros, MD Seizure Prophylaxis 2007 BTF Recommendations Level II Prophylactic anticonvulsants not recommended to prevent late Sz Level III Anticonvulsants are indicated to prevent early post-trauma seizures

Michelle Biros, MD Key Learning Points Avoid hypotension and hypoxia in patients with severe TBI Avoid hypotension and hypoxia in patients with severe TBI Acute interventions to reduce ICP should occur in cases of herniation or acute deterioration Acute interventions to reduce ICP should occur in cases of herniation or acute deterioration

Michelle Biros, MD Questions? ferne_memc_2007_braincourse_biros_tbi_091707_finalcd 9/18/2015 6:59 AM