Question
In a head injury victim, which of the following is the most common initial manifestation of an increasing intracranial pressure?
The correct answer is
Change in the consciousness level
Head Injury: Recognizing Increasing Intracranial Pressure
In a patient with a head injury, the earliest and most frequent sign indicating a rise in intracranial pressure (ICP) is a change in the level of consciousness.
Why Consciousness Changes First
- The brain's arousal centers, particularly the reticular activating system (RAS), are very sensitive to pressure.
- Even a small increase in ICP can disrupt RAS function, leading to subtle or obvious changes like drowsiness, confusion, lethargy, or even loss of consciousness.
- This change is often the first indicator that pressure is building inside the skull.
Other Manifestations
- Pupillary changes (like dilatation, often unilateral initially) usually indicate brainstem compression, typically occurring later than altered consciousness.
- Hemiparesis (weakness on one side of the body) suggests focal brain injury or herniation impacting motor pathways, which may also be a later sign compared to the generalized effect on consciousness.
Therefore, monitoring for alterations in the patient's awareness and responsiveness is crucial for early detection of increasing ICP.
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Important Questions from Brain & Nervous System Surgery
- In diffuse axonal injury all are true EXCEPT:
- A 70 years old man on anticoagulants due to some heart disease suffered a minor head injury. One month later he has severe headache with slowly developing neurological signs. The probable diagnosis is:
- A patient with suspected head injury is brought to the emergency following road traffic accident. At the time of examination, patient is conscious with GCS 14/15 and stable vitals. There is bleeding from right ear and CSF leak from nose. Bruising is present behind the right ear. The most probable clinical diagnosis in this patient is
- A comatose patient after sustaining severe head injury has been admitted in neurosurgical ICU. Which of the following parameters should ideally be maintained in this patient ?
1. pCO$_2$ = 4.5 – 5.0 kPa (33-38 mm Hg)
2. MAP = 80 – 90 mm of Hg
3. pO$_2$ > 11 kPa (> 80 mm Hg)
4. Na$^+$ < 130 meq/L
Select the correct answer using the code given below : Which of the following chromosomal abnormalities are associated with brain tumours?
1. Neurofibromatosis type 1
2. Neurofibromatosis type 2
3. Peutz-Jeghers syndrome
4. Hereditary nonpolyposis colorectal cancer
Select the correct answer using the code given below.
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