Post-Craniotomy & Neurosurgical Nursing Guide

🧠 What is a Craniotomy?

A craniotomy is the surgical removal of a bone flap from the skull to access the brain. The flap is replaced at the end of surgery (cf. craniectomy — flap not replaced).

Tumour

Resection / Biopsy

Haematoma

Evacuation

Aneurysm

Clipping / AVM

🔴 Surgical Indications

Haematoma evacuation — extradural (EDH), subdural (SDH), intracerebral (ICH) — haematoma >30 ml or significant midline shift is general surgical threshold
Tumour resection — primary (glioma, meningioma) or metastatic
Aneurysm clipping — subarachnoid haemorrhage (SAH)
AVM resection — arteriovenous malformation
Abscess drainage — pyogenic or fungal
CSF diversion — third ventriculostomy, haematoma with hydrocephalus
Decompressive craniectomy — refractory raised ICP (flap not replaced)

🌍 GCC Clinical Context

ⓘ Trauma neurosurgery is high-volume across GCC hospitals. Road traffic accidents (RTA) are a leading cause of traumatic brain injury and extradural/subdural haematoma requiring emergency craniotomy.

RTA extradural haematoma — classic lucid interval then rapid deterioration
Hajj crush/stampede injuries — acute subdural and brain contusions
Neurosurgery is a recognised major speciality at all DHA, DOH, MOH and NGHA hospital groups
GCC exam regulators (SCFHS, QCHP) frequently test post-op neuro nursing competencies

📈 WFNS & Hunt-Hess Grades — SAH Surgical Timing

Hunt-Hess Grade (clinical)

Grade	Clinical Description	Timing
I	Asymptomatic or mild headache	Early surgery (<72h)
II	Moderate–severe HA, no neuro deficit	Early surgery
III	Drowsy / mild focal deficit	Early if fit
IV	Stupor, moderate–severe hemiparesis	Delayed / conservative
V	Deep coma, decerebrate posturing	Delayed / palliative

CT / Imaging Findings — Surgical Thresholds

Haematoma volume >30 ml — general surgical threshold
Midline shift >5 mm — significant mass effect
Hydrocephalus — EVD or surgical CSF diversion
Obliteration of basal cisterns — high ICP, poor prognosis
Contrecoup contusion — opposite side to impact, may expand

✅ Pre-operative Preparation Checklist

Baseline neurological assessment — GCS (E/V/M separately), pupils, focal deficit — DOCUMENTED
Dexamethasone — reduce perioperative cerebral oedema (typically 8 mg IV stat, then q6h)
Anticonvulsant prophylaxis — Levetiracetam (Keppra) per protocol
Urinary catheter — fluid balance monitoring, avoid urinary retention post-op
Two large-bore IV access (16G minimum) — rapid resuscitation if needed

Hair preparation — clip/shave operative site per surgical team instruction
Informed consent — including risk of neuro deficit, seizure, bleeding, infection, death
CT/MRI reviewed — surgeon confirms approach and orientation
Blood group & crossmatch — 2–4 units RBC prepared
NPO status confirmed, antibiotics (cefazolin) given on-call to theatre

⚡ Awake Craniotomy — Overview

⚠ Awake craniotomy is used when the tumour involves eloquent cortex — language (Broca's / Wernicke's areas) or primary motor cortex. The patient is awake during a portion of surgery to allow real-time neurological testing, maximising resection while preserving function.

Specific nursing challenges include patient anxiety management, prolonged positioning (4–6 h), communication during intraoperative testing, and seizure management in a conscious patient. See Tab 5 for full detail.

⏱ Neuro Obs Frequency Protocol

⚠ Any single neuro deterioration should prompt immediate escalation regardless of scheduled obs time. Never delay re-assessment if patient behaviour or family concern raises alarm.

Time Post-Op	Frequency	Rationale
0 – 2 h	Every 15 min	Highest risk of acute haemorrhage / anaesthetic emergence complications
2 – 6 h	Every 30 min	Continued early post-op monitoring
6 – 10 h	Every 1 h	Stabilisation phase
10 – 24 h	Every 2 h	If clinically stable
>24 h (stable)	Every 4 h	Routine ward monitoring

🧠 GCS — Component Documentation

ⓘ Always document EACH component separately (E_V_M), not just the total. A GCS of 10 could be E2V3M5 or E4V2M4 — clinically very different.

Component	Score	Response
Eyes (E) Max 4	4	Spontaneous
	3	To voice
	2	To pain
	1	None
Verbal (V) Max 5	5	Orientated
	4	Confused
	3	Words only
	2	Sounds only
	1	None
Motor (M) Max 6	6	Obeys commands
	5	Localises pain
	4	Withdraws
	3	Abnormal flexion
	2	Extension
	1	None

👁 Pupil Assessment

Assess size (mm — use pupil gauge), reactivity (brisk / sluggish / fixed), and equality
Normal: equal, round, 2–4 mm, brisk reaction to light
Anisocoria (unequal pupils) — investigate immediately

🚫 Unilateral fixed dilated pupil = CN III compression by uncal herniation — EMERGENCY. Urgent CT + neurosurgeon call immediately.

🚫 Bilateral fixed dilated pupils = brainstem herniation / catastrophic ICP rise — treat as arrest-level emergency.

Limb Power — MRC Scale

Grade	Description
0	No contraction
1	Flicker only
2	Movement with gravity eliminated
3	Movement against gravity
4	Movement against resistance (reduced)
5	Normal power

🔴 Cushing's Triad — Critical Emergency Sign

🚫 Cushing's Triad = IMPENDING HERNIATION. This is a late, life-threatening sign of critically raised ICP. Immediate neurosurgeon notification and emergency intervention required.

1. Hypertension

Rising systolic BP — Cushing reflex attempt to perfuse brain against rising ICP. SBP often >160–180 mmHg.

2. Bradycardia

Reflex baroreceptor response to severe hypertension. HR typically <60 bpm — do NOT treat in isolation without context.

3. Irregular Breathing

Brainstem compression alters respiratory pattern — Cheyne-Stokes, apnoeic episodes, or Biot's breathing.

📋 ICP Management & Target Parameters

Non-Pharmacological ICP Measures

HOB elevated 30° — promotes cerebral venous drainage
Head in neutral position — avoid neck flexion, rotation, tight ties / collars
Avoid Valsalva manoeuvres — constipation management important
Normocapnia (normocapnia) — PaCO₂ 4.5–5.0 kPa (do not allow CO₂ to rise)
Euvolaemia — avoid fluid overload and dehydration
Temperature control — fever increases cerebral metabolic demand

Target Parameters (Post-Craniotomy)

Parameter	Target
SpO₂	>95%
PaO₂	>11 kPa
PaCO₂	4.5 – 5.0 kPa
Temperature	<37.5°C
Sodium	140 – 150 mmol/L
Glucose	6 – 10 mmol/L
ICP	<20 mmHg
CPP	60 – 70 mmHg

🚫 Any acute neurological deterioration post-craniotomy is a neurosurgical emergency until proven otherwise. GCS drop ≥2 points, new focal deficit, or Cushing's triad → call neurosurgeon immediately and prepare for urgent CT.

🔴 Complication Recognition & Management Table

Complication	Signs & Symptoms	Nursing Action	Medical Treatment
Intracranial Haemorrhage	Acute GCS drop, new focal deficit, Cushing's triad, severe headache	Immediate neurosurgeon call, urgent CT request, prepare theatre	Return to theatre for haematoma evacuation
Cerebral Oedema	Gradual deterioration over hours–days, headache, vomiting, drowsiness	HOB 30°, neurological obs q1h, fluid balance, inform team	Dexamethasone, Mannitol 0.25–0.5 g/kg IV bolus, 3% NaCl hypertonic saline
Post-Op Seizure	Tonic-clonic or focal seizure activity, tongue bite, incontinence, post-ictal confusion	Safety — lateral position, suction, O₂, time seizure, call team	Lorazepam 4 mg IV stat; Levetiracetam prophylaxis continued
Hydrocephalus	Headache, vomiting, decline in GCS, papilloedema, EVD output decreasing	Check EVD patency, drain level, alert neurosurgeon	EVD insertion / repositioning; VP shunt if chronic
CSF Leak	Clear watery nasal / ear discharge, salty taste, "halo sign" on dressing, headache relief on leaning forward	HOB 30°, no nose-blowing, glucose dipstick on fluid (CSF = glucose positive), strict fluid observation	Conservative (usually resolves), lumbar drain if persistent, surgical repair if needed
Meningitis	Fever, severe headache, neck stiffness (Kernig's / Brudzinski's positive), photophobia, GCS decline	Blood cultures, wound inspection, escalate urgently	Empirical IV antibiotics (ceftriaxone ± vancomycin); LP if safe (no mass effect)
Air Embolism	Sitting/posterior fossa surgery: sudden fall in ETCO₂, hypotension, mill-wheel murmur (precordial Doppler), desaturation	Alert anaesthetist and surgeon immediately, flood surgical field with saline	Durant's manoeuvre (L lateral decubitus + Trendelenburg), aspirate air via CVP catheter, 100% O₂, CPR if arrested
DVT / PE	Calf tenderness/swelling, tachycardia, pleuritic chest pain, desaturation	TED stockings, IPC device, document and report symptoms	LMWH usually started day 1–3 post-op when neurosurgery team comfortable; IVC filter if anticoagulation contraindicated

💉 Oedema Management Drugs

Reduces vasogenic cerebral oedema (perioperative & tumour-associated)
Dose: 4–8 mg IV q6h (varies by protocol)
Monitor: hyperglycaemia, gastric protection (PPI cover), infection risk
Taper gradually post-op — do not stop abruptly

Osmotic diuretic — reduces intracellular brain water
Dose: 0.25–0.5 g/kg IV bolus (100–200 ml in adult)
Onset: 15–30 min; duration: 2–6 h
Monitor: serum osmolality (target <320 mOsm/kg), electrolytes, urine output, BP
Risk of rebound ICP if used repeatedly without osmolality monitoring

Alternative to mannitol; preferred if patient is hypovolaemic or hypotensive
Raises serum sodium — osmotic effect reduces brain water
Target Na: 145–155 mmol/L for ICP crisis (caution — avoid >160)
Administer via central line (high concentration); monitor Na q4–6h

⚡ Seizure Management

⚠ Post-craniotomy seizure risk is elevated due to cortical irritation from surgical manipulation, residual haematoma, or cerebral oedema.

Acute Seizure Protocol

Protect patient — clear area, lateral position, no restraint, do not put objects in mouth
Maintain airway — jaw thrust if needed, suction if secretions
High-flow O₂ via non-rebreathe mask
Time the seizure — document start, type, duration
Lorazepam 4 mg IV (or diazepam 10 mg IV/PR if no IV access)
If seizure >5 min or recurs — second benzodiazepine + phenytoin / levetiracetam IV loading
Call team — consider intubation if airway at risk

Prophylaxis: Levetiracetam 500–1000 mg BD PO/IV continued for 1–3 months post-operatively per neurosurgery team guidance.

🚨 CSF Leak — Bedside Test

Glucose Dipstick Test

Apply discharge to glucose dipstick or filter paper
CSF contains glucose (similar to blood glucose) → dipstick positive
Normal nasal mucus = glucose negative
"Halo / target sign" — place bloody discharge on white sheet — CSF forms outer clear halo around blood stain

Nursing Management

HOB 30° — reduces CSF pressure at leak site
Strict no nose-blowing, no sneezing suppressed (sneeze with open mouth), no straining
Document volume and character of discharge
Meningitis risk — monitor for fever, headache, neck stiffness
Surgical repair if leak persists >7–10 days or beta-2 transferrin test confirms CSF

💉 EVD — External Ventricular Drain Overview

Anatomy & Insertion

Catheter inserted into frontal horn of lateral ventricle
Insertion point: Kocher's point — right side, 1 cm anterior to coronal suture, 3 cm lateral to midline
Right side preferred (non-dominant hemisphere in most patients)
Tunnelled subcutaneously to exit through a separate scalp site
Connected to external drainage system with pressure transducer

Indications

ICP monitoring and control (TBI, SAH, post-craniotomy)
Hydrocephalus — temporary CSF drainage
Intraventricular haemorrhage
Ventriculitis — intrathecal antibiotic administration
Bridge to VP shunt insertion

📋 EVD Set-Up & Reference Point

ⓘ Reference point: The EVD zero point (air-fluid interface in the drip chamber) must be levelled to the tragus of the ear, which approximates the foramen of Monro — the anatomical zero reference for ICP.

Tragus

= Foramen of Monro = Zero reference

<15 mmHg

Normal ICP (routine: 0–10)

>20 mmHg

Treat — sustained elevated ICP

ICP Measurement Technique

Level drip chamber / transducer to tragus of ear (patient supine or HOB 30° — document position)
Clamp EVD drainage port
Zero transducer to atmosphere (open stopcock)
Read ICP from transducer display or waveform
Document reading and patient position
Re-open drainage port per protocol after measurement

Drain Height & Drainage Control

Drain height set above tragus = drainage threshold (e.g., drain set 10 cm above = drains when ICP >10 cmH₂O / ≈7 mmHg)
Open to drain: if ICP >20 mmHg sustained, or per specific medical order
Clamped for ICP measurement, transport, repositioning
Record hourly: drainage volume (ml/h), ICP, CSF colour
Normal drainage: 10–20 ml/h (protocol-dependent)
Sudden drop in drainage + ICP rise = blocked drain — do NOT irrigate without neurosurgery instruction

👁 CSF Colour Assessment

Colour	Significance	Action
Clear	Normal CSF	Routine monitoring
Blood-stained (frank)	Haemorrhage — SAH, IVH, trauma	Document, notify if change from baseline
Xanthochromic (yellow)	Old blood breakdown products — SAH >4–6h	Expected in SAH; inform if unexpected
Turbid / cloudy	Infection / ventriculitis	URGENT — inform team, CSF sample for MC&S, start empirical abx

Sterile EVD Nursing Care

Treat EVD system as sterile — hand hygiene + gloves for ALL interactions
Dressing change: q48h using sterile technique (or per local policy)
CSF sampling: only via designated closed sampling port using sterile technique — never open system
Prevent kinking, looping, or tension on catheter
EVD insertion site: inspect for signs of infection, CSF leak around catheter, or displacement
Label all ports clearly — confusion with IV lines is a serious error

📈 EVD Weaning & Removal

Gradually raise drain height in increments (e.g., 5 cmH₂O steps over hours–days) — assess ICP tolerance at each level
Monitor ICP response — if ICP rises significantly with each height increase, patient not ready for removal
Clamp trial — drain clamped for 24–48 h with continuous ICP monitoring; patient should maintain ICP <20 mmHg
Repeat CT — assess ventricular size, resolution of original pathology, no new hydrocephalus
Removal — by neurosurgeon or trained ANP; apply sterile pressure dressing; send catheter tip for MC&S if infection concern
Post-removal monitoring — ICP clinically assessed via neuro obs for 24–48 h

⚠ If the patient fails the clamp trial, a VP shunt (ventriculo-peritoneal shunt) may be required for definitive CSF diversion.

🧠 Awake Craniotomy — Purpose & Patient Selection

Purpose

Allows real-time cortical mapping of eloquent brain during tumour resection
Eloquent areas: language (Broca's area — left inferior frontal; Wernicke's — left superior temporal), primary motor cortex, sensory cortex
Goal: maximise tumour resection extent while preserving neurological function
Used most commonly for low-grade and high-grade gliomas in/near eloquent regions

Patient Selection Criteria

Motivated, cooperative, able to understand procedure
Cognitively intact — able to perform language / motor tasks
No severe anxiety disorder or claustrophobia
No severe obstructive sleep apnoea (airway risk)
Tumour in or adjacent to eloquent cortex
Pre-operative neuropsychological assessment ideally performed

📋 Nursing Role — Pre-operative Preparation

ⓘ Pre-operative nursing preparation is particularly important for awake craniotomy. Patients who understand what to expect report the experience as "strange but not terrible." Normalising language and detailed explanation significantly reduce intraoperative anxiety and improve cooperation.

Information & Anxiety Management

Explain the asleep-awake-asleep (or asleep-awake) technique in detail
Describe what the patient will experience: head fixation, surgical drapes, noise, surgeon talking to them
Practice the neurological tasks pre-operatively (naming objects, counting, sentence repetition, moving hand/foot on command)
Address fear of pain — local anaesthetic + sedation technique; intracranial brain has no pain receptors
Establish a signal for discomfort / distress (e.g., raise hand)

Physical Preparation

Urinary catheter — long procedure (4–6 h), cannot mobilise
IV access — typically 2 large-bore peripheral lines
Antiemetic prophylaxis — nausea during awake phase is distressing
Comfortable positioning discussion — lateral or semi-lateral for 4–6 h
Anxiolytic pre-medication per anaesthetic team prescription
Hearing aids / glasses available if patient uses them (task performance)

🛠 Intraoperative Neurological Testing

Task Type	Tests	Significance if Impaired
Language (expressive)	Naming objects from pictures, word generation, counting	Cortex near Broca's area — risk of expressive aphasia
Language (receptive)	Following commands, sentence repetition	Near Wernicke's area — risk of receptive aphasia
Motor	Moving contralateral hand, finger tapping, leg lifting	Near primary motor cortex — risk of hemiparesis
Sensory	Reporting tactile stimulation / paraesthesia	Near primary sensory cortex
Reading	Reading aloud from cards	Left hemisphere language areas

When direct cortical stimulation causes a deficit, the surgeon marks the site and avoids resection in that area. The nurse communicates with the patient and monitors responses during stimulation — this is a primary nursing function in the awake phase.

🚨 Intraoperative Complication Management

Intraoperative Seizure

Surgeon irrigates cortex with cold saline — terminates cortical seizure spread
Anaesthetist administers benzodiazepine (propofol or midazolam IV)
Nurse: time seizure, protect airway, monitor resps, communicate calmly to patient if conscious
If generalised — may need to transition to asleep technique

Anxiety / Distress

Nurse maintains continuous verbal reassurance and communication
Anaesthetist adjusts sedation level (dexmedetomidine / propofol titration)
Distress cue agreed pre-operatively (raised hand) — respect immediately
Offer comfort — cool cloth, verbal redirection

Airway Obstruction

Risk during deep sedation phase (asleep-awake transition)
Jaw thrust, airway adjunct (nasal airway preferred — less stimulating)
Laryngeal mask or intubation if airway not maintainable
Operating team prepared for emergency airway at all times

Persistent Neurological Deficit

Surgeon stops resection if function consistently impaired on testing
Position verified — pressure on eloquent areas
Cortical swelling — irrigate, consider osmotherapy
Document timing and nature of deficit for post-op comparison

✅ Post-Awake Craniotomy Recovery

Enhanced recovery pathway — awake craniotomy patients typically recover faster than GA craniotomy
Neurological assessment immediately on return from theatre — document language and motor status vs pre-op baseline
Oral fluids within hours if swallow is safe and patient is alert
Early mobilisation (same day if able) — reduces DVT risk, promotes recovery
Psychological support — normalise the experience, debrief if patient distressed about procedure memories
Language / physiotherapy referral if any new deficit identified post-operatively
Family communication — explain expected course and any new deficits honestly

🔴 Cushing's Triad — Exam Critical

HTN + Bradycardia + Irregular Respirations

🚫 IMPENDING CEREBRAL HERNIATION — Emergency. Late sign of critically raised ICP. Call neurosurgeon immediately. Do NOT treat the bradycardia in isolation.

Component	Mechanism
Hypertension	Cushing reflex — vasomotor centre raises BP to maintain CPP
Bradycardia	Baroreceptor reflex to severe HTN (not primary cardiac cause)
Irregular breathing	Brainstem compression alters respiratory pattern

📋 ICP Management — Quick Reference

Measure	Detail
HOB elevation	30° — promotes venous drainage
Neutral head position	No neck flexion or rotation — venous obstruction
PaCO₂ target	4.5–5.0 kPa (normocapnia)
Mannitol	0.25–0.5 g/kg IV bolus
3% NaCl	Target Na 145–155 (ICP crisis)
Treat ICP if	>20 mmHg sustained
CPP target	60–70 mmHg
Temperature	<37.5°C — avoid fever

💉 EVD — Exam Key Points

Tragus

Reference point = Foramen of Monro

<15 mmHg

Normal ICP (0–10 routine)

>20 mmHg

Treat if sustained

ⓘ Clamp EVD to measure ICP. Open drain to treat elevated ICP per protocol/order. Drain set height above tragus = drainage threshold pressure.

📈 GCC Regulatory Exam High-Yield Topics

DHA / DOH / SCFHS / QCHP Focus Areas

Cushing's triad identification and response (always appears)
GCS documentation — emphasise E/V/M separately
Pupil assessment — what does a fixed dilated pupil mean?
EVD drain reference point (tragus / foramen of Monro)
CSF leak identification (glucose dipstick, halo sign)
Post-op seizure first response (benzodiazepine, lorazepam 4mg IV)
Mannitol dose and monitoring parameters
HOB positioning for ICP management (30°)
Air embolism — position (Durant's / L lateral decubitus)
Neuro obs frequency post-craniotomy

Common MCQ Traps

Bradycardia in Cushing's triad is a reflex response to hypertension, not a primary arrhythmia. Treating with atropine without addressing ICP is wrong. The correct action is urgent neurosurgical intervention for raised ICP.

Lumbar puncture is contraindicated if there is CT evidence of mass effect, midline shift, or raised ICP — risk of tonsillar herniation ("coning"). CT head first, then LP if safe.

Post-craniotomy hypertension may be the Cushing reflex maintaining CPP against raised ICP. Aggressive blood pressure lowering without controlling ICP can cause cerebral ischaemia. Always assess in context of ICP and GCS before treating BP.

Every time the patient's head position changes (sitting up, repositioned), the EVD drip chamber must be re-levelled to the tragus. Failure to do so gives inaccurate ICP readings and incorrect drainage.

📊 Post-Craniotomy Neuro Obs Tracker

Enter current observations. GCS is auto-calculated. Alerts fire on critical thresholds. Up to 3 recent entries are shown for trending.

GCS Components

Eyes (E) — max 4

Verbal (V) — max 5

Motor (M) — max 6

—

GCS Total / 15

Pupils

Right Pupil Size (mm)

Right Pupil Reactivity

Left Pupil Size (mm)

Left Pupil Reactivity

Vital Signs

Heart Rate (bpm)

BP Systolic (mmHg)

BP Diastolic (mmHg)

Respiratory Rate (/min)

Temperature (°C)

Limb Power (MRC 0–5)

Right Arm / Leg (MRC)

Left Arm / Leg (MRC)

Post-Craniotomy & Neurosurgical Nursing

Recent Observations (last 3)