Manchester Triage System, Time-Critical Presentations & Mass Casualty for GCC Emergency Nurses
Manchester Triage System (MTS) — 5 Levels
The MTS is the primary triage standard in UAE DHA/DOH hospitals and widely adopted across GCC emergency departments. Each patient is assigned a level based on presenting discriminators within defined time-to-clinician targets.
Level 1
IMMEDIATE — Red
Target: 0 min
Life-threatening conditions requiring immediate resuscitation. Examples: Cardiac arrest, respiratory arrest, major haemorrhage, anaphylaxis with cardiovascular compromise, severe respiratory distress (SpO2 <85%), eclampsia with seizure, major trauma with haemodynamic instability.
Level 2
VERY URGENT — Orange
Target: 10 min
Potentially life-threatening if not treated rapidly. Patient may deteriorate. Examples: Acute chest pain, stroke symptoms (FAST positive), infant with high fever >38°C aged <3 months, acute confusion or altered GCS, moderate respiratory distress (SpO2 88–94%), severe pain (8–10/10), active seizure, severe hypertensive crisis, suspected ectopic pregnancy with haemodynamic instability.
Level 3
URGENT — Yellow
Target: 60 min
Significant pain, distress or potential for deterioration. Examples: Moderate pain (4–7/10), fracture without neurovascular compromise, persistent vomiting, fever >39°C in child aged 3–36 months, moderate asthma (SpO2 >94% but wheeze), limb injury, abdominal pain, head injury with brief LOC, psychiatric emergency (not violent), urinary retention, foreign body.
Level 4
STANDARD — Green
Target: 120 min
Less urgent. No immediate risk of deterioration. Examples: Minor wounds needing suture, sprains and strains, mild pain (<4/10), stable chronic conditions with mild exacerbation, mild urinary symptoms, dental pain, mild allergic reaction (no airway involvement), earache, minor burns (<5% TBSA), mild fever in adults.
Level 5
NON-URGENT — Blue
Target: 240 min
Minor problems that can be managed in primary care. Examples: Prescription or sick-note requests, minor skin conditions, chronic non-acute complaints, follow-up wound checks, mild conjunctivitis, insect bites without reaction, general health queries, cold symptoms >3 days without red flags.
Other Triage Systems Used in GCC
Canadian Triage & Acuity Scale (CTAS)
5-level system used in several Saudi hospitals and some Qatari facilities. Levels 1–5 map similarly to MTS but use chief-complaint-based modifiers. CTAS 1 = Resuscitation, CTAS 2 = Emergent, CTAS 3 = Urgent, CTAS 4 = Less Urgent, CTAS 5 = Non-Urgent. Reassessment intervals are built into the scale.
Emergency Severity Index (ESI)
US-origin 5-level tool increasingly used in UAE private hospitals and some Kuwaiti facilities. ESI uniquely incorporates predicted resource utilisation (labs, imaging, IV fluids) into the triage decision. ESI 1–2 need immediate attention; ESI 3 requires multiple resources; ESI 4–5 need one or no resources.
All GCC systems distinguish primary triage (rapid 30-second sort at the door) from secondary triage (full assessment by triage nurse with vitals, history, and discriminator identification). Primary triage is often done by a trained triage officer or senior nurse at the ambulance bay or walk-in entrance.
Primary Survey — ABCDE Approach
Complete each element in order. Any life threat identified must be managed before proceeding to the next step. Time to complete primary survey: under 2 minutes for Level 1–2 patients.
A
Airway
Is the airway open, obstructed, or at risk? Look for: stridor, gurgling, snoring, drooling, foreign body, facial burns, angioedema, altered level of consciousness (ALOC) with inability to protect airway. Action: jaw thrust, suction, positioning, adjuncts (OPA/NPA), RSI if indicated.
B
Breathing
Assess: respiratory rate (normal adult 12–20/min), work of breathing (accessory muscles, nasal flaring, intercostal recession), SpO2 (target ≥94% in most adults; 88–92% in COPD), breath sounds (wheeze, absent sounds). Action: supplemental O2, positioning, nebulised bronchodilators, BVM if needed.
C
Circulation
Assess: HR, BP, capillary refill time (CRT <2s), skin colour/temperature, peripheral pulses, active bleeding. Shock indicators: HR >100, BP systolic <90, CRT >2s, cool/clammy peripheries, altered consciousness. Action: IV access ×2, fluids, haemostasis, ECG.
D
Disability (Neurological)
GCS (Eye 1–4, Verbal 1–5, Motor 1–6; normal = 15). AVPU scale for rapid assessment (Alert, Voice, Pain, Unresponsive). Pupils: size, symmetry, reactivity. Blood glucose level (BGL) — hypoglycaemia is a reversible cause of ALOC. Action: BGL correction, anticonvulsants, CT scan activation.
E
Exposure & Everything Else
Full exposure while maintaining dignity and preventing hypothermia. Assess: temperature (normal 36.1–37.2°C), pain score (NRS 0–10), rashes, wounds, oedema, abdominal distension, IV/urinary catheter sites. Obstetric history if female of reproductive age. Log-roll for spinal injuries.
Abnormal sounds (stridor, grunting, wheeze), abnormal positioning (tripod), retractions (subcostal, intercostal, suprasternal), nasal flaring, head bobbing in infants.
Circulation to Skin
Pallor, mottling, cyanosis. Compare central vs peripheral perfusion. In infants, look for sunken fontanelle (dehydration), grey skin tone (shock).
Vital Sign Normal Ranges by Age
Parameter
Normal Range
Concern Threshold
STEMI
Door-to-Balloon Target: 90 minutes — ECG within 10 minutes of arrival. Activate cath lab immediately on ECG confirmation. If PCI unavailable within 120 min, administer thrombolysis (streptokinase or tenecteplase) — door-to-needle target: 30 min.
Attach cardiac monitor and 12-lead ECG within 10 minutes of triage registration. Do not wait for doctor to request.
If ST elevation ≥1mm in 2+ contiguous leads, or LBBB with clinical suspicion — activate STEMI pathway immediately.
IV access ×2, aspirin 300mg PO (if not already taken), oxygen only if SpO2 <94%, troponin and renal panel.
Notify cardiology and cath lab team simultaneously. Time-stamp every intervention.
Morphine 2–4mg IV titrated for pain. GTN 0.4mg SL if SBP >90mmHg. Avoid GTN in RV infarct (ST elevation in V4R).
Stroke — FAST & NIHSS
tPA window: 4.5 hours from symptom onset — CT brain within 25 min of arrival. Mechanical thrombectomy window up to 24 hours in selected patients. Time is brain: 1.9 million neurons lost per minute of ischaemia.
FAST Assessment
Face — unilateral droop or numbness Arm — unilateral weakness (arm drift) Speech — slurred, word-finding difficulty Time — call time of symptom onset; activate stroke pathway immediately
ED Actions
CT brain non-contrast within 25 min. CBC, coag, BGL, renal function. BP management: do NOT lower BP aggressively unless >185/110 (pre-tPA threshold). Maintain SpO2 ≥94%, BGL 4–11 mmol/L, normothermia. Nil by mouth (swallowing assessment).
Septic Shock — Hour-1 Bundle
Sepsis-3 Definition: Life-threatening organ dysfunction from dysregulated host response to infection. Septic shock = sepsis + vasopressors needed + lactate >2 mmol/L despite fluid resuscitation.
Measure blood lactate — if ≥4 mmol/L, activate septic shock protocol regardless of BP.
Draw blood cultures ×2 (peripheral + central if available) BEFORE antibiotics — do not delay >45 minutes.
Broad-spectrum IV antibiotics within 1 hour of sepsis recognition (e.g., piperacillin-tazobactam ± vancomycin).
IV crystalloid 30 ml/kg within 3 hours (reassess after each 500ml bolus — lung auscultation, CVP, urine output).
First-line treatment: Adrenaline 0.5mg (1:1000) IM into anterolateral thigh — NO DELAY. Do NOT wait for IV access. Repeat every 5 minutes if no improvement.
Recognition
Rapid onset (minutes to 2 hours after trigger) involving skin/mucosa PLUS one of: airway compromise (stridor, hoarse voice, throat swelling) OR cardiovascular compromise (hypotension, syncope, tachycardia) OR severe bronchospasm.
Secondary Treatment
IV fluid bolus 500–1000ml (hypotension). Salbutamol nebuliser (bronchospasm). Chlorphenamine 10mg IV (antihistamine). Hydrocortisone 200mg IV (delayed phase). Observe minimum 6 hours; 12–24 hours if biphasic reaction risk. Discharge with 2× EpiPen prescription.
DKA Management
Fluids first, insulin second. Do NOT start insulin until potassium is ≥3.5 mmol/L — hypokalaemia risk.
Confirm: BGL >11 mmol/L, ketonaemia/ketonuria, pH <7.3 or bicarbonate <15.
0.9% NaCl 1L over 1 hour, then guided by clinical status. Total fluid deficit 3–6L over 24–48 hours.
Add 40mmol KCl to each litre of fluid once K+ <5.5 mmol/L (replace potassium early — insulin will drop K+).
Insulin infusion 0.1 units/kg/hr after K+ confirmed ≥3.5 mmol/L. Check BGL and electrolytes every hour.
Clinical diagnosis — do NOT wait for CXR. Immediate needle decompression: 2nd intercostal space, mid-clavicular line with 14G cannula.
Classic signs: absent breath sounds unilaterally, tracheal deviation (away from affected side — late sign), hypotension, raised JVP, severe respiratory distress. Often seen in trauma, ventilated patients, or spontaneous in tall thin young males (Marfan habitus).
Meningococcal Meningitis
Administer IV antibiotics (ceftriaxone 2g) BEFORE LP if delay anticipated >30 min. CSF culture loss is acceptable — treatment delay is not.
Recognition: severe headache, neck stiffness (Kernig's/Brudzinski's signs), photophobia, non-blanching petechial/purpuric rash (meningococcaemia — emergency). Fever may be absent in elderly. Droplet isolation immediately. LP after CT only if no raised ICP signs.
GCC-Specific Emergencies
Heat Stroke
Common in GCC summers (outdoor workers, Hajj). Classic vs Exertional. Core temp >40°C + CNS dysfunction (confusion, seizure, coma). Remove from heat, strip clothing, apply ice packs to axillae/groin/neck, cold water misting, IV fluids. Target cooling rate 0.1°C/min. Avoid shivering (reverses cooling).
MERS-CoV Isolation
Middle East Respiratory Syndrome. Triggers: fever + respiratory symptoms + travel to/from Arabian Peninsula OR camel contact OR known MERS exposure. Action: immediate airborne + contact + eye protection isolation. Notify infection control. N95 mask for aerosol-generating procedures. Nasopharyngeal swab for PCR.
RTA / Polytrauma
Road traffic accidents are the leading cause of ED trauma in GCC. ATLS primary survey: C-ABCDE (haemorrhage control first in penetrating trauma). MTP activation threshold: HR >120, SBP <90, mechanism of injury. Damage control resuscitation: 1:1:1 ratio (PRBC:FFP:Platelets). Permissive hypotension (SBP 80–90) until surgical haemostasis.
Severe Dehydration
High ambient temperatures (up to 50°C) combined with fasting (Ramadan) or physical labour. Assess: mucous membranes, skin turgor, fontanelle (infants), urine output, electrolytes. IV fluid choice depends on Na+ level. Caution: rapid correction of severe hypernatraemia risks cerebral oedema — max Na+ correction 0.5 mmol/L/hr.
Triage Documentation — Minimum Elements
Required Fields
Date and exact time of arrival (to the minute)
Mode of arrival (walk-in, ambulance, police, transfer)
Chief complaint in patient's own words
Vital signs at triage (all 5 + pain score + BGL if relevant)
Triage level assigned (1–5) with clinical justification
Allergies and current medications (when obtainable)
Time patient called to treatment area
Triage nurse name, designation, and signature
Reassessment Intervals
L1 Continuous monitoring
L2 Every 10 minutes if not yet seen
L3 Every 30 minutes in waiting room
L4 Every 60 minutes
L5 Every 120 minutes or once
LWBS & LBTC Documentation
Left Without Being Seen (LWBS): Document time patient last seen in waiting area, triage level, and attempts to locate. Flag for follow-up call within 24 hours for Level 2–3.
Left Before Treatment Complete (LBTC): Document medications given, tests pending, diagnoses discussed, and discharge advice given. Physician signature required. Notify GP/primary care if concerning findings.
ED Overcrowding Measures
Internal diversion: Fast-track for Level 4–5; dedicated paediatric triage bay. Surge protocol activation: When ED capacity >85%; corridor nursing; additional staffing call-in. Ambulance diversion: Last resort; notification to EMS control; Level 1–2 always accepted regardless of status. Bed management: Early ED consultant notification; admission planning; discharge lounge utilisation.
MCI Triage — START System
Simple Triage and Rapid Treatment (START) is used in mass casualty incidents. Each patient triage takes under 60 seconds. Do not treat during START — only tag and move.
START Categories
IMMEDIATE (Red)Life-threatening but salvageable — airway/breathing/circulation problem treatable in field
DELAYED (Yellow)Serious injury but stable — can wait up to 1 hour without risk to life
MINOR (Green)Walking wounded — able to follow commands and ambulate
EXPECTANT/DEAD (Black)No respirations after airway opening, or unsurvivable injuries
START Decision Tree
Step 1: Can the patient walk?
Breathing present after airway opening?
Respiratory Rate >30 or <10?
Respiratory Rate 10–30?
Radial pulse absent?
Radial pulse present?
Follows simple commands?
Does NOT follow commands?
Infection Control at Triage
Immediate Isolation Triggers
• Fever + travel history (within 21 days) from endemic area
Hajj/Umrah Season (Saudi Arabia): Up to 3 million pilgrims. Surge protocols include field triage stations at Mina/Muzdalifah, pre-positioned IV fluids, heat stroke cooling facilities, mass casualty protocols for stampede or fire incidents.
GCC Summer Peak (all countries): June–September. Heat stroke surge, dehydration admissions, outdoor worker injuries. ED staffing typically increased 20–30% in this period.
Triage Scenario Quiz — Assign MTS Level
Select the correct Manchester Triage System level for each scenario. Immediate actions are explained in the feedback.
Red Flag Symptoms — Must-Not-Miss
Sudden severe headache"Worst headache of my life" — subarachnoid haemorrhage until proven otherwise. CT head urgent.
Tearing back/chest painAortic dissection — never give thrombolytics before excluding dissection.
Fever + non-blanching rashMeningococcaemia — antibiotics within minutes, not hours.
New focal neuro deficitStroke — CT within 25 min, tPA window closes at 4.5 hours.
SpO2 <88% on airCritical hypoxaemia — immediate oxygen, identify cause, prepare for intubation.
Pulsatile abdominal massRuptured AAA — immediate vascular surgery, blood products, do NOT delay with CT if haemodynamically unstable.
Positive FAST + shockHaemoperitoneum — emergency laparotomy, MTP activation. No time for CT.
Pregnancy + abdominal pain + haemo instabilityEctopic until proven otherwise — immediate OB consult, IV ×2, crossmatch.
Unilateral limb swelling post-flightDVT/PE risk — Wells score, D-dimer or CT-PA depending on pre-test probability.
GCS drop of 2+ pointsNeurological deterioration — re-escalate to L1/L2, CT head, neurosurgery on-call notification.
Triage Nurse Competencies (GCC ED Standard)
Clinical Competencies
Minimum 2 years acute care nursing experience
Valid BLS certification (AHA or equivalent)
ACLS preferred; TNCC for trauma centres
Proficiency in 12-lead ECG interpretation (basic)
Venepuncture and IV cannulation competency
Triage system-specific training and annual recertification
Paediatric triage training (PAT, PALS awareness)
Regulatory Requirements (UAE)
DHA/DOH nursing license (appropriate scope of practice)
Annual competency assessment per DHA ED standards
Completion of DHA-approved triage training programme
Documentation in EMR (Salama/Wareed/iHIS systems)
Participation in MCI drills (minimum annually)
Infection control certification current
Cultural competency training (multilingual ED context)
De-escalation & Managing Long Waits
Communication Principles
Acknowledge the wait: "I understand this is frustrating"
Explain the triage system simply (sicker patients first)
Give realistic time estimates without false promises
Update waiting patients every 30–60 min proactively
Use interpreter services — do not use family as interpreters for clinical history
Verbal De-escalation Steps
Remain calm, low tone, open body language
Move to private space to reduce audience effect
Use name: "Mr Al-Rashidi, let me help you"
Acknowledge concerns before explaining policy
Set clear limits calmly: "I need you to be seated for me to help"
Escalate to charge nurse or security if behaviour escalates
GCC Emergency Nurse Triage Guide — For educational purposes. Always follow your institution's protocols and DHA/DOH/MOH guidelines. — Back to Nursing Platform