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34 Cards in this Set
- Front
- Back
List the classification of primary injuries in head trauma
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1. Skull fracture
2. Concussion 3. Contusion 4. Intracranial haematoma 5. Diffuse axonal injury 6. Penetrating injury |
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List the secondary effects of skull fracture.
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1. Acute extradural haemorrhage
[temporal bone] |
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Which is incorrect regarding Diffuse Axonal
Injury (DAI) ? Neurotrauma , behind intracranial haematoma. 3. It involves shearing and rotational forces on the axonal network. microscopic level. |
2. It is the the predominant mechanism of
injury in neurotrauma |
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Which is not a factor associated with Minimal head injury ?
2. GCS 14 3. No Neurological deficit 4. No palpable depressed skull # 5. Normal memory and alertness |
2. = GCS 15
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What are the features of Minimal head injury in the Neurotrauma severity scale?
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1. No LOC
2. GCS 15 3. Normal alertness and memory 4. No neurological deficit 5. No palpable depressed # / other sign of skull # |
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What are the features of MILD head injury in the Neurotrauma Severity Scale?
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1. Brief LOC [< 5 minutes]
2. Amnesia for event 3. GCS 14 ( < 2 hours) -->15 4. Impaired alertness / memory 5. No palpable depressed skull # / other sign of skull # |
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What are the features of moderate OR
potentially severe head injury in the Neurotrauma Severity scale ? |
1. Prolonged LOC [> 5 min]
2. Persistent GCS < 14 3. Focal Neurological deficit 4. Post traumatic seizure 5. Intracranial lesion on CT brain 6. Palpable depressed skull # |
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What Severity of head injury is the following
features associated with ? |
Moderate or potentially severe
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What are the associated GCS numbers in
relation to the AVPU scale of mentation in trauma? |
Alert ===> GCS 14-15
Verbal stimuli ===> GCS 9-13 Painful stimuli ===> GCS 6-8 Unresponsive ===> GCS 3-5 |
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What are the greatest risks, in regards to
secondary injury, to the patient with a moderate-severe head injury ? |
1. hypoxia
2. hypotension |
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Which is incorrect regarding the secondary survey of the head injured
patient? 1. Coma = GCS 8 or less 2. A non-responsive dilated pupil indicates contralateral herniation 3. A more common cause of abnormal pupillary reactions is the presence of direct ocular trauma. 4. A confused patient with eyes opening to voice, and localisation to pain has a GCS of 12 5. A patient using inappropriate words, with eye opening to pain and withdrawing to pain has a GCS of 9 |
2. Non responsive dilated pupil =
ipsilateral herniation |
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What "High-risk" discriminators { high risk groups} warrant CT scanning in those patients with GCS 14-15?
[ with 'minor' head injury or 'presumed' head injury ] |
1. Intoxication
2. Elderly {>65} 3. Anticoagulated 4. Demented |
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What are the 5 criteria of the Canadian Head Rules that are "High-risk" for neurosurgical
intervention, in those patients with a head injury classified as mild, with a GCS 13-15? |
1. GCS < 15 2 hours after injury
2. Suspected open/depressed skull # 3. Any sign of basal skull # 4. Vomiting > 2 episodes 5. Age > 65 |
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Which of the following is incorrect regarding Head injury?
1. Head injury associated with LOC , amnesia and a GCS of 14-15 will have a positive CT scan in approximately 10% of patients. 2. The subsequent craniotomy rate for the above scenario is < 1%. minor head injury only. frequency of CT scanning. |
2. Craniotomy rate = 1-3%
1. = 7-12% |
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What are the categories for Eye Opening in the GCS scoring system?
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1. Spontaneously = 4
2. To verbal command = 3 3. To pain = 2 4. Nil = 1 |
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What are the categories for Best Verbal
response in the GCS scoring system ? |
1. Orientated = 5
2. Confused = 4 3. Inappropriate words = 3 4. Incomprehensible sounds = 2 5. Nil = 1 |
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What are the categories for Best Motor
Response in the GCS scoring system ? |
1. Obeys Command = 6
2. Localises to pain = 5 3. Withdraws to pain = 4 4. Abnormal flexion to pain = 3 5. Abnormal extension to pain = 2 6. Nil = 1 |
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Which is incorrect regarding the use of mannitol in head injury ?
1. It can be used as an osmotic diuretic as a temporizing measure to enable a patient with a surgically remedial lesion to get to theatre. |
3. short-term reduction in ICP.
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List the specific management options for
moderate-severe head injury in the ED. |
1. Correct hypoxia
2. Correct hypovolaemia 3. Elevate head of bed 30 degrees 4. Anticonvulsant prophylaxis 5. Antibiotic prophylaxis [compound fractures] 6. General supportive therapy. a. Maintain thermoregulation b. Maintain hydration c. Address pressure care and nutrition |
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What are the indications for intubation and
ventilation of the neurotrauma patient? |
1. Inadequate ventilation / gas exchange
a. hypercarbia b. hypoxia c. apnoea 2. Inability to maintain airway (loss of protective reflexes) unstable airway |
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Which is incorrect regarding the head injured
patient? injured patient. contraindicated. |
1. Albumin has been shown to have
detrimental effects |
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In regards to the disposition of the head injured patient, which is incorrect?
1. Isolated (Rural) Emergency Departments should have a low threshold for transfer of the mildly head injured patient to a Neurosurgical centre. 2. The presence of pneumocephalus precludes unpressurised high altitude flight. |
5. Worse outcome is associated with :
a. prolonged pre-hospital time |
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Which is incorrect regarding severe head injury?
1. Early neurological abnormalities are NOT reliable prognostic factors 2. Mortality in severe head injury is 35% 3. Low GCS at presentation is associated with a worse outcome. 4. 50% patients with GCS < 11 for > 6 hours will die. 5. The vast majority of deaths are associated with Diffuse axonal injury and acute subdural haematomas. |
4. GCS < 9 for > 6 hours = 50% mortality
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(Tintinalli)
What is the equation for Cerebral Blood Flow? |
CPP = MAP - ICP
Cerebral Perfusion Pressure |
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(Tintinalli)
List the Secondary insults that may worsen the Clinical Outcome of head Injury. |
1. Cerebral Oedema
2. Elevated ICP 3. Hypoxia 4. Hypotension 5. Anaemia. |
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(Tintinalli)
List the 3 High risk Patient groups at greater risk of Traumatic Brain Injury (TBI) |
1. Elderly
2. Paediatric 3. Alcoholics |
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(Tintinalli)
In regards to Mild TBI , list the High risk subgroup factors on Hx / Ex / Ix |
1. Drug / alcohol intoxication
2. Age > 60 3. Large subgaleal haematoma /swelling 4. Focal Neurological findings 5. Coagulopathy 6. Skull fracture |
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(Tintinalli)
Which of the following is incorrect regarding TBI? A. The typical location of a basal skull fracture is the petrous temporal bone. B. The mortality of severe TBI (GCS < 9 ) is < 40% C. In Children, linear skull fractures resulting from a fall < 4 feet can be associated with Clinically significant intracranial lesions. |
C. Paediatric Linear Skull fractures Tend not to develop Clinically significant intracranial lesions.
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(Tintinalli)
Which of the following is incorrect regarding TBI? A. Traumatic SAH may be the most common CT abnormality in patients with moderate - severe TBI. B. A fixed and dilated pupil, with ipsilateral hemiparesis is a classic late finding of epidural haematoma. C. A common location for cerebral contusions is the frontal cortex. D. Patients with brain atrophy are more susceptible to SDH. |
B. Ipsilateral fixed and dilated pupil +
CONTRALATERAL hemiparesis. |
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(Tintinalli)
Which is incorrect regarding Subdural Haematoma? A. Lethargy can be a presentation of SDH. B. A SDH is a collection of venous blood between the inner table of the skull and the dura mater. C. In infants, SDH has a strong association with NAI. D. Chronic SDH = > 2 weeks. |
B. SDH = Blood Between the dura mater and the arachnoid.
An Epidural (extradural) is a collection of blood (arterial / venous) between the inner table of the skull and the dura mater. |
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(Tintinalli)
What are the 3 common locations for Cerebral contusions? |
1. Frontal poles
2. Subfrontal cortex 3. Temporal lobes |
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(Tintinalli)
A decreasing conscious level, with Bilateral pinpoint pupils, Bilateral Babinski signs, and increased muscle tone, are indicative of which type of herniation? |
Central Transtentorial Herniation.
Progresses to Fixed midpoint pupils and decorticate posturing. |
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(Tintinalli)
In comparing the New Orleans and Canadian CT Head rules, which is correct? A. The Canadian CT Head Rule is more Sensitive but less specific. B. For Neurosurgical Intervention, The New Orleans is more Sensitive, but less specific. C. The Canadian rule is more specific for both positive CT findings, and the need for Neurosurgical Intervention. D. The Canadian CT rule is 38% Specific for CT + findings, but 100% Specific for N/Surg intervention. |
C. New Orleans : 100% Sensitive but 5%
specific for both Positive CT findings and neurosurgical intervention. |
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List as many components of the Neuroprotective strategy as possible, for the patient with a traumatic intracranial haemorrhage. |
1. Intubate [ for airway control and CO2 Mx) 2. Maintain PCO2 35-40 (low normal) Prevent hypercarbia 3. Maintain Normoxia - Aim PO2 80-100 SaO > 95% Prevent Hyperoxia / Hypoxia 4. Maintain MAP > 80 mmHg Prevent hypotension / Hypertension 5. Head of bed at 30 degrees elevation 6. Loosen any neck ties / restriction to venous return 7. Maintain normothermia Prevent hyperthermia 8. Maintain normoglycemia Prevent hypoglycaemia 9. Maintain Na+ high-normal 10. Maintain adequate sedation / paralysis |