GCC Nursing Platform

Neurosurgery Nursing

Post-Craniotomy Care & ICP Management — DHA / DOH / SCFHS Exam Ready

Neurological Assessment

Eye Opening (E)

4 — Spontaneous
3 — To voice
2 — To pain
1 — None

Verbal Response (V)

5 — Orientated
4 — Confused
3 — Words only
2 — Sounds only
1 — None

Motor Response (M)

6 — Obeys commands
5 — Localises pain
4 — Withdraws
3 — Abnormal flexion
2 — Extension
1 — None

Total score: 3–15

13–15 Mild

9–12 Moderate

3–8 Severe — consider airway

GCS ≤8: Intubation threshold

FOUR Score (alternative to GCS — used in intubated patients): Eye response (0–4), Motor response (0–4), Brainstem reflexes (0–4), Respiration (0–4). Max score 16. Advantage: detects locked-in syndrome and herniation patterns GCS cannot.

CRITICAL SIGN — Indicates severely raised ICP with brainstem compromise

↑

Hypertension

Widened pulse pressure
Systolic rise

↓

Bradycardia

HR <60 bpm
Reflex response

Irregular Breathing

Cheyne-Stokes or
ataxic respirations

Mechanism: Rising ICP compresses brainstem → vasomotor centre activates → massive sympathetic surge (BP rises) → baroreceptor reflex → vagal bradycardia. Irregular breathing = medullary dysfunction. This is a PRE-TERMINAL sign.

Pupil Assessment

Normal

Equal, round, reactive to light (ERRPL). Size 2–5mm. Brisk reaction bilaterally.

Sluggish / Unequal

Anisocoria: difference >1mm is significant. Sluggish reaction = early CN III compression. Escalate immediately.

Fixed & Dilated

Blown pupil = CN III palsy = uncal herniation. Ipsilateral fixed/dilated pupil → contralateral hemiplegia. EMERGENCY.

Bilateral Fixed/Dilated

Central herniation or hypoxia/drugs. Check medications (atropine, adrenaline). Exclude pharmacological cause.

Neurological Obs Frequency

IMMEDIATE Every 15 minutes — first 2 hrs post-op

EARLY Every 1 hour — stable post-op

STABLE Every 4 hours — improving patient

Any GCS drop of ≥2 = immediate escalation

Limb Strength Assessment

MRC Scale (0–5) — assess all four limbs

0 — No movement
1 — Flicker only
2 — Movement, not against gravity
3 — Against gravity, not resistance
4 — Against resistance (reduced)
5 — Normal strength

Pronator drift test: arms outstretched, eyes closed — pronation/downward drift = subtle weakness

Cranial Nerve III (Oculomotor) — Herniation Warning Sign

CN III runs adjacent to the uncus. In uncal herniation, the temporal lobe uncus herniates through the tentorial notch, compressing CN III → ipsilateral fixed dilated pupil (parasympathetic fibres on outside of nerve) + contralateral hemiplegia (pyramidal tract compression). Early sign: ptosis and eye deviated "down and out".

Raised ICP Management

Monroe-Kellie Hypothesis

The skull is a rigid box. Total volume is fixed:

80%

Brain tissue

10%

Blood

10%

CSF

↑ in one compartment → compensatory ↓ in another. Once compensation fails → ICP rises exponentially (Pressure-Volume curve).

ICP & CPP Values

Normal ICP: 5–15 mmHg

Raised ICP: >20 mmHg (treat above 20–25)

CPP = MAP − ICP

Cerebral Perfusion Pressure

Target CPP: 60–70 mmHg

CPP <50 = cerebral ischaemia risk. MAP must be maintained if ICP rises.

Clinical Signs of Raised ICP

Headache
Worse on lying flat, coughing, straining (↑ ICP positionally)

Vomiting
Projectile, non-preceded by nausea — direct medullary stimulation

GCS Decline
Deteriorating consciousness — early: confusion/agitation; late: coma

Pupil Changes
Anisocoria → fixed dilated → bilateral fixed = herniation sequence

Cushing's Triad
Hypertension + bradycardia + irregular respiration = pre-terminal

Papilloedema
Blurred optic disc margins on fundoscopy — chronic raised ICP

Medical ICP Lowering Measures

Positioning

Head of bed 30° elevation (promotes venous drainage). Keep neck neutral — no flexion/rotation. Avoid tight collar/ETT ties.

Ventilation

Normocapnia: PaCO₂ 4.5–5.0 kPa. Avoid PEEP if possible. Hyperventilation (PaCO₂ 4.0–4.5) as short-term bridge only — causes vasoconstriction but ischaemia risk.

Fluids

Isotonic fluids only (0.9% NaCl or Hartmann's). Avoid hypotonic fluids (↑ cerebral oedema). Maintain euvolaemia.

Mannitol 20%

0.25–1 g/kg IV bolus over 15–20 min. Osmotic diuretic — draws water from brain. Monitor serum osmolality (max ~320 mOsm/kg). Ensure adequate renal function.

Hypertonic Saline 3%

Alternative/adjunct to mannitol. 2–5 mL/kg bolus. Raises serum sodium (target 145–155 mmol/L). Monitor Na⁺ closely. Via central line preferred.

Sedation/Temperature

Propofol/midazolam reduce cerebral metabolic rate. Normothermia (36–37°C). Treat pyrexia aggressively (each 1°C ↑ raises CMRO₂ ~7%).

Surgical ICP Decompression

EVD (External Ventricular Drain): Placed in lateral ventricle. Drains CSF → lowers ICP directly. Zeroed at Foramen of Monro. Allows ICP monitoring.

Decompressive Craniectomy: Removal of skull flap to allow brain to expand. Last resort for refractory ICP. High morbidity. Cranioplasty performed 6–12 weeks later.

Post-Craniotomy Care

Zeroing the Transducer

Zero at level of Foramen of Monro = tragus of the ear / outer canthus of eye. Re-zero after every position change. Use spirit level. Incorrect zeroing = inaccurate ICP readings.

Drainage Rate & Level

Drainage ordered by neurosurgeon — usually set at 10–20 cmH₂O above Foramen of Monro. Monitor hourly output. Expected: 10–20 mL/hr (varies). Document colour: clear → slightly xanthochromic (normal). Bloody = haemorrhage risk.

Clamping Protocol

ALWAYS clamp EVD before repositioning the patient. Failure to clamp risks rapid CSF drainage → ventricular collapse → haemorrhage. Unclamp and re-zero once repositioned. Never leave unclamped and unattended during transfers.

Infection Prevention

Strict aseptic technique. Closed drainage system. Do not aspirate CSF. Daily site inspection. Prophylactic antibiotics per protocol. EVD-related ventriculitis risk ↑ after 5–7 days.

Blood Pressure Targets

Precise targets depend on pathology and surgeon instruction.

Avoid Hypertension: Risk of re-bleeding at surgical/aneurysm site. Typical systolic target <140–160 mmHg (condition-specific).

Avoid Hypotension: Maintain CPP. Systolic >90 mmHg minimum. MAP >65–70 mmHg. Consider vasopressors if needed (noradrenaline first line).

Venous Drainage Optimisation

Head of bed at 30° — promotes jugular venous drainage

Neck in neutral position — avoid flexion/rotation (compresses jugular veins)

Avoid tight ET tube ties, cervical collars if possible

Avoid Valsalva (coughing/straining) — prescribe stool softeners; anti-emetics promptly

Post-Craniotomy Medication Management

Seizure Prophylaxis

Levetiracetam (Keppra): 500–1000mg BD IV/PO — preferred (fewer drug interactions).
Phenytoin: loading 15–18 mg/kg IV slow (max 50 mg/min) — monitor ECG. Duration: typically 7 days post-op unless ongoing seizure risk.

Analgesia

Paracetamol 1g QDS — preferred (no sedation, no effect on GCS).
Codeine with caution — mild opioid, less respiratory depression than morphine.
Avoid morphine/strong opioids — sedation masks GCS assessment, risk of respiratory depression.

Anti-emetics

Ondansetron 4mg IV/PO TDS — first line (no sedation, 5-HT3 antagonist).
Avoid metoclopramide if extrapyramidal concern.
Vomiting ↑ ICP via Valsalva — treat promptly.

DVT Prophylaxis

TED stockings / pneumatic compression immediately post-op. LMWH (e.g. enoxaparin) timing per surgeon — usually 24–48 hrs post-op for elective, delayed for trauma/haemorrhage cases.

Specific Neurosurgical Conditions

Subarachnoid Haemorrhage (SAH)

Cause: Berry aneurysm rupture (~85%). AVM, trauma. GCC: higher rates in younger patients with hypertension.

Presentation: Thunderclap headache ("worst of my life"), meningism (neck stiffness, photophobia), LOC, focal deficit.

Rebleeding: Highest risk 24 hrs. Mortality ~70%. Strict BP control. Secure aneurysm (coiling/clipping) ASAP.

Vasospasm: Days 4–14. Delayed ischaemic neurological deficit (DIND). Monitor with TCD/angiography. Nimodipine 60mg PO every 4 hrs × 21 days (calcium channel blocker — reduces vasospasm severity).

Fluid Mgmt:Current evidence: euvolaemia (not hypervolaemia). Triple-H (Hypertension/Haemodilution/Hypervolaemia) largely historical. Maintain adequate circulating volume.

EVD / Hydrocephalus: SAH can block arachnoid villi → communicating hydrocephalus. EVD insertion for acute hydrocephalus. Later: VP shunt if persistent.

Subdural Haematoma (SDH)

Acute SDH

High-energy trauma. Bridging vein/arterial bleed. CT: hyperdense (white) crescent. GCS may decline rapidly. Surgical evacuation: craniotomy or burr holes.

Chronic SDH

Elderly / anticoagulated / alcoholic patients. Minor/no trauma. CT: hypodense (dark) crescent. Insidious onset. Burr hole drainage nursing: monitor drain output, colour, GCS post-op.

Burr Hole Drain Nursing: Maintain closed drainage system at surgeon-specified level. Document output volume and colour. Monitor for drain blockage (no/minimal output despite raised ICP). Neuro-obs hourly. Check anticoagulation reversal status.

Brain Tumour Surgery

Glioma: Grade I–IV (GBM = Grade IV). Infiltrating. Debulking surgery. Peritumoral oedema causes significant ICP.

Meningioma: Usually benign, extra-axial. Often curable by excision. Significant vascularity — post-op haemorrhage risk.

Dexamethasone: Reduces peritumoral vasogenic oedema. Typical: 4mg QDS. Taper post-op (do not stop abruptly).
Monitor: hyperglycaemia (BM), PUD prophylaxis (PPI), infection risk, proximal myopathy on prolonged use.

Steroid Taper: Reduce gradually post-op over 1–2 weeks. Abrupt cessation → adrenal insufficiency + rebound oedema. Monitor BM 4-hourly while on steroids.

CSF Leak

Recognition: Clear watery fluid from nose (rhinorrhoea) or ear (otorrhoea) — especially post-trauma/skull base surgery. "Halo sign" on gauze (blood-centre, clear ring around).

Confirmation: β₂-transferrin test (CSF-specific protein). Glucose dipstick (CSF has glucose; nasal mucus low — less reliable). CT cisternography / MRI for leak site.

Strict Precautions

• No nose blowing (↑ intracranial pressure)
• No NGT insertion (risk of intracranial placement)
• No suction via nasal route
• Sneeze with mouth open
• Meningitis prophylaxis per protocol
• Bed rest / head elevation

Management: Conservative: bed rest, avoid Valsalva. Lumbar drain may be inserted. Surgical repair (dural patch/fat graft) if persistent (>7 days) or recurrent.

Complications & Emergency Management

Feature	Diabetes Insipidus (DI)	SIADH	Cerebral Salt Wasting (CSW)
Serum Na⁺	↑ HIGH (>145)	↓ LOW (<135)	↓ LOW (<135)
Volume Status	Hypovolaemic/Dehydrated	Euvolaemic/Slightly ↑	Hypovolaemic
Urine Output	↑↑ >3L/day, dilute	↓ Concentrated	↑ High (natriuresis)
Urine Specific Gravity	<1.005 (very dilute)	>1.020 (concentrated)	Variable (Na⁺ rich)
Cause	ADH deficiency — pituitary/hypothalamic injury	ADH excess — many CNS causes	Renal Na⁺ wasting — SAH, TBI
Treatment	Desmopressin (DDAVP) IV/SC/intranasal + IV fluid replacement	Fluid restriction (0.5–1L/day). Treat cause.	IV isotonic/hypertonic saline + fludrocortisone

Key exam differentiation: SIADH vs CSW — both give low Na⁺, but CSW is hypovolaemic (needs fluids). Fluid restriction in CSW would be dangerous. Check volume status carefully.

Post-Op Haematoma

GCS decline + pupil change in first 24 hrs = haematoma until proven otherwise.

Actions:

1. Escalate to neurosurgeon immediately
2. Emergency non-contrast CT head
3. Prepare for return to theatre
4. IV access × 2, bloods (FBC/Coag/G&S)
5. Reverse anticoagulation if applicable
6. Keep NBM

Status Epilepticus

Seizure >5 min or no recovery between seizures = status epilepticus. NICE protocol:

Phase 1 (0–10 min): Lorazepam 4mg IV (or diazepam PR 10mg × 2)
Phase 2 (10–30 min): Levetiracetam 60mg/kg IV (max 4.5g) OR Phenytoin 20mg/kg IV (max 50mg/min, ECG monitoring)
Phase 3 (30+ min): ICU — general anaesthesia (propofol/thiopental). ITU care.

Neurogenic Pulmonary Oedema

SAH-associated. Massive sympathetic surge → ↑ pulmonary capillary pressure → fluid transudation. Occurs within hours of SAH.

Signs: Hypoxia, pink frothy sputum, bilateral crackles, CXR: bilateral infiltrates.
Management: Oxygen/ventilatory support, diuretics with caution (maintain CPP), treat underlying ICP.

Diabetes Insipidus — Pituitary / Hypothalamic Injury

Common after: pituitary surgery (transsphenoidal resection), craniopharyngioma resection, severe TBI, hypothalamic injury.

Diagnosis criteria:
Urine output >200–250 mL/hr (or >3L/day)
Urine specific gravity <1.005
Urine osmolality <300 mOsm/kg
Serum Na⁺ >145 mmol/L rising

Treatment:
Desmopressin (DDAVP) 1–4 mcg IV/SC or 10–20 mcg intranasal
IV fluid replacement (0.45% NaCl or 5% dextrose)
Hourly urine measurement
Monitor serum Na⁺ 2–4 hourly

Nursing:
Strict fluid balance hourly
Weigh patient daily
Urine SG each void
Report if UO >200 mL/hr for 2 consecutive hours
Avoid rapid Na⁺ correction

GCC Context & Exam Prep

GCC-Specific Neurosurgical Context

TBI — Road Traffic Accidents

Leading cause of TBI in GCC region. High vehicle speeds, variable seatbelt compliance, young male predominance. Saudi Arabia, UAE among highest global road fatality rates. Neurosurgical trauma capability in major centres (KFMC, KFSH, Rashid Hospital Dubai).

Aneurysmal SAH in GCC

Younger average age at presentation vs Western populations. Hypertension prevalence rising. High rates of undiagnosed hypertension. Smoking common in male population. Endovascular coiling increasing vs surgical clipping.

Cultural & Family Communication

Acquired brain injury — family often first informed collectively. Gender-concordant communication preferences. Use certified interpreter services (not family for consent). Arabic-language patient information essential. Family meetings with neurosurgeon + nurse + interpreter.

Islamic Ethics — Brain Death & Organ Donation

Brain death accepted by Islamic Fiqh Academy (1986) as legal death. Organ donation permissible (fatwa from major councils). Family consent crucial. Timing of discussions — sensitivity to grief process. Chaplaincy / religious guidance services available in GCC hospitals.

DHA / DOH / SCFHS Neurosurgical Nursing Competencies

DHA (Dubai)

Dubai Health Authority. Prometric-based exam. Neurosurgical ICU nurses must demonstrate competency in: ICP monitoring, EVD care, GCS assessment, neurological emergency response, safe medication administration.

DOH (Abu Dhabi)

Department of Health Abu Dhabi. Sheryan system licensing. Neurosurgical nursing: critical care competency framework, patient safety standards, neurological deterioration recognition, family-centred care documentation.

SCFHS (Saudi Arabia)

Saudi Commission for Health Specialties. Prometric CBT exam. Neurosurgery nursing: classification exams for specialisation. Focus: emergency neuro assessment, pharmacology, post-op complications, ethical/legal framework.

DHA / DOH / SCFHS Exam Key Topics

GCS Scoring — Common Exam Questions

Q: Patient opens eyes to pain, speaks confused words, localises pain. GCS? → E2+V4+M5 = 11
Q: GCS score indicating need for airway protection? → ≤8
Q: Best motor response for GCS? → Obeys commands = 6
Q: Intubated patient verbal score? → Document as "T" or 1T

Cushing's Triad — Exam Facts

Q: Three components of Cushing's triad? → Hypertension + Bradycardia + Irregular respirations
Q: What does Cushing's triad indicate? → Severely raised ICP / brainstem herniation
Q: Is Cushing's triad early or late sign? → LATE / pre-terminal

ICP Management Principles

Q: Normal ICP range? → 5–15 mmHg
Q: Target CPP? → 60–70 mmHg
Q: Head position for ↑ICP? → 30° elevation, neutral neck
Q: Target PaCO₂ in ventilated neuro patient? → 4.5–5.0 kPa (normocapnia)
Q: Osmotic agent for acute ICP? → Mannitol 20% 0.25–1g/kg

DI vs SIADH Differentiation

Q: DI — serum Na⁺ direction? → HIGH (hypernatraemia)
Q: SIADH — urine concentrated or dilute? → Concentrated (high SG)
Q: DI treatment? → Desmopressin (DDAVP)
Q: SIADH treatment? → Fluid restriction
Q: CSW vs SIADH — key differentiator? → Volume status: CSW = hypovolaemic

Interactive Clinical Tool

ICP Emergency Assessment Tool

For educational use only — not for clinical decision making

GCS Change from Baseline?

Pupil Assessment

Cushing's Triad Present?

Recent Neurosurgical Procedure?

GCC Nursing Platform — Neurosurgery Nursing Guide | For educational and exam preparation purposes only

Not a substitute for clinical guidelines, institutional protocols, or qualified medical supervision