Trauma, Poisoning & Environmental Emergencies - Memory Anchors
In emergency nursing, split-second recall can mean the difference between life and death — so these memory anchors transform dry clinical facts into unforgettable mental images, stories, and mnemonics. Each anchor creates a 'hook' in long-term memory: a trigger you can pull under exam pressure or at the bedside. For NLE success, the goal is not to memorize facts but to OWN them — and that is exactly what these anchors are designed to do.
Memory anchors
Primary Survey — ABCDE of Trauma
Memory aid
Think of yourself as a TRAUMA DOCTOR named 'Dr. ABCDE': Airway (with C-spine), Breathing, Circulation, Disability, Exposure/Environment. Remember: 'Always Be Calm During Emergencies.' The order is NON-NEGOTIABLE — you never skip to C before securing A, just like you never serve rice before cooking it.
Why it works
Sequential acronyms reduce cognitive load by giving a reliable starting point. The Filipino analogy of cooking rice makes the order feel natural and culturally grounded.
Example usage
NLE question: 'A patient arrives after a vehicular accident. What is the FIRST nursing priority?' Answer: Airway with cervical spine control — because A comes first in ABCDE.
Recall trigger
Think 'Always Be Calm During Emergencies' — each first letter = a trauma priority
Trauma Lethal Triad — Hypothermia, Acidosis, Coagulopathy
Memory aid
The Lethal Triad is like a DEATH SPIRAL TRICYCLE: three wheels (Hypothermia, Acidosis, Coagulopathy) that spin each other — once one wheel turns, the others follow. A cold patient bleeds more (coagulopathy), bleeding causes shock and acidosis, acidosis worsens clotting and makes the body even colder. The tricycle picks up speed until it crashes — unless YOU stop it by keeping the patient WARM. Remember: 'HAC kills — Heat Attacks Coagulopathy's enemy.'
Why it works
The tricycle analogy makes the self-reinforcing cycle of the lethal triad vivid and easy to explain. The 'wheels spinning' image captures the dangerous feedback loop.
Example usage
NLE question: 'Why is maintaining normothermia a resuscitation priority in multiple trauma?' Answer: Because hypothermia is part of the lethal triad (HAC) — a self-reinforcing cycle of Hypothermia, Acidosis, and Coagulopathy that is deadly.
Recall trigger
Picture a tricycle with three wheels labeled H-A-C spinning out of control
Parkland Formula for Burn Fluid Resuscitation
Memory aid
Remember the Parkland Formula with: '4 x KiloS x Burn = LR over 24' — say it like: 'FOUR KILOS BURN in Lactated Ringer's for 24 hours.' Then for timing: 'HALF in the FIRST 8, HALF in the NEXT 16.' Picture a Filipino lechon (roasted pig) on a spit — 4 rods holding it (4 mL), weighed in kilos (kg), burned to a percentage (% TBSA), dripping liquid (Lactated Ringer's) for 24 hours.
Why it works
The lechon image is culturally vivid and ties the number 4 to the formula instantly. The '4 kilos burn' verbal chunk compresses three variables into one phrase.
Example usage
NLE question: '70 kg patient with 40% TBSA burns. How much LR in the first 8 hours?' Calculation: 4 x 70 x 40 = 11,200 mL total / 2 = 5,600 mL in the first 8 hours.
Recall trigger
Picture a lechon on 4 rods dripping fluid for 24 hours — half the drip in the first 8 hours
Rule of Nines for Burns — Body Surface Area
Memory aid
Visualize a BODY DIVIDED INTO 9s: Think of yourself stretching your arms out like a cross. Your HEAD is a single 9 (9%). Each ARM is a 9 (9% each). Your CHEST (front) is two 9s (18%), your BACK is two 9s (18%). Each LEG is two 9s (18% each). The PERINEUM is a lone 1%. Total = 100%. Memory image: '9 for head, 9 per arm, 18 for chest, 18 for back, 18 per leg, 1 for privates.'
Why it works
Breaking the body into visual regions with consistent 9% units creates spatial memory. The cross/outstretched arms position is a memorable pose.
Example usage
NLE question: 'A patient has burns covering the entire right arm and anterior trunk. What is the %TBSA?' Answer: Right arm (9%) + anterior trunk (18%) = 27% TBSA.
Recall trigger
Stretch arms out like a cross — assign 9s to each body part you see
CO Poisoning — Pulse Oximetry is Falsely Normal
Memory aid
Story: 'Nurse Cora trusted the pulse oximeter showing 98% SpO2 on a patient found unconscious in a closed garage. She thought he was fine — until he stopped breathing. The oximeter LIED because it can't tell carboxyhemoglobin from oxyhemoglobin — they look the same to it!' Moral: CO poisoning + enclosed space + normal SpO2 = DO NOT TRUST THE MACHINE. Treat with 100% O2 and suspect CO always in fire or enclosed space victims.
Why it works
The micro-story creates emotional memory and a cautionary 'never again' feeling. The betrayal of a trusted tool (pulse ox) creates a memorable emotional hook.
Example usage
NLE question: 'A patient rescued from a house fire has SpO2 of 99%. What should the nurse do?' Answer: Do NOT rely on the SpO2 — it is falsely normal in CO poisoning. Administer 100% oxygen via non-rebreather mask.
Recall trigger
Nurse Cora's lying pulse oximeter — enclosed space + normal SpO2 = suspect CO
Key Antidotes — Poison-Antidote Pairs
Memory aid
Use the phrase: 'ONE ANGRY DOCTOR GIVES BETTER FLUIDS WITH MAGIC' — each pair in order: Opioids → Naloxone, Acetaminophen → N-Acetylcysteine, Digoxin → anti-Digoxin Fab, Organophosphates → Atropine + Pralidoxime, Benzodiazepines → Flumazenil, Beta-blockers → Glucagon, Warfarin → Vitamin K, Methanol → fomepizole (Magic antidote), Iron → deferoxamine (the last one = Chain-binder). Write each first letter: O-A-D-O-B-B-W-M-I.
Why it works
Linking poison-antidote pairs into a silly story creates a connected narrative rather than isolated facts. The phrase 'ONE ANGRY DOCTOR' is vivid and easy to visualize.
Example usage
NLE question: 'A patient overdosed on heroin has respiratory depression. What antidote is given?' Answer: Naloxone — the antidote for opioids (O → Naloxone in the chain).
Recall trigger
Picture ONE ANGRY DOCTOR giving antidotes one by one in a busy ER
Organophosphate Poisoning — Muscarinic Toxidrome (SLUDGE)
Memory aid
SLUDGE: Salivation, Lacrimation, Urination, Defecation, GI distress, Emesis. Picture a patient literally 'turning into SLUDGE' — drooling, crying, peeing, defecating, with stomach cramps and vomiting. Antidote reminder: 'ATP — Atropine + pralidoxime for organoPhoSphates.' Think: you need ATROPINE to DRY UP the SLUDGE.
Why it works
SLUDGE is a classic medical mnemonic with strong visual imagery. The 'drying up sludge' metaphor for atropine's anticholinergic action makes the mechanism intuitive.
Example usage
NLE question: 'A farmer arrives with excessive salivation, lacrimation, urination, and vomiting. What is the antidote?' Answer: Atropine (with pralidoxime) — organophosphate poisoning causing SLUDGE toxidrome.
Recall trigger
Imagine a person 'turning into SLUDGE' — drooling, crying, all body fluids flowing
Activated Charcoal — Contraindications
Memory aid
Activated charcoal is USELESS and DANGEROUS with: 'ALL CRIMINALS HIDE UNDER ICE' — Alcohols, Corrosives, Hydrocarbons, Unprotected airway (unconscious), Iron, Lithium. Plus: NEVER induce vomiting for caustics or hydrocarbons — re-exposure burns twice! Imagine charcoal REFUSING to work on these 'criminal' substances that slip right past it.
Why it works
The 'criminal substances' image makes charcoal's limitations feel like a confrontation it can't win. The list fits a memorable phrase for NLE recall.
Example usage
NLE question: 'A child drank bleach. Should activated charcoal be given?' Answer: No — corrosives are a contraindication to activated charcoal. Also do NOT induce vomiting.
Recall trigger
Charcoal chasing criminals — Alcohols, Corrosives, Hydrocarbons, Unprotected airway, Iron, Lithium escape
Heat Exhaustion vs. Heat Stroke — Key Differentiator
Memory aid
Think of it as a TRAFFIC LIGHT: Heat EXHAUSTION = YELLOW light — the body is warning you, but the driver (brain) is still in control. Mental status is INTACT. Heat STROKE = RED LIGHT — core temp >40°C, the driver (brain) is GONE (altered mental status = confusion, seizures, coma). RED = STOP EVERYTHING and COOL NOW. Antipyretics are useless because the problem is not fever — it is the environment overloading the body's thermostat.
Why it works
The traffic light analogy creates an instant visual code — yellow for caution, red for emergency. The 'brain is the driver' metaphor makes mental status the key differentiator memorable.
Example usage
NLE question: 'A marathon runner is confused and has a temp of 41°C. What is the priority intervention?' Answer: Immediate aggressive cooling — this is heat STROKE (red light), not heat exhaustion.
Recall trigger
Traffic light: Yellow = exhaustion (brain OK), Red = stroke (brain gone)
Hypothermia Management — Handle Gently (VF Risk)
Memory aid
Story: 'The Ice Patient — A rescue team found a hypothermic hiker and roughly lifted him onto a stretcher. As they jostled him, his cold, irritable heart fired randomly — ventricular fibrillation. He died before reaching the hospital.' Lesson: A cold heart is like a GLASS CHRISTMAS ORNAMENT — beautiful but shatters with rough handling. ALWAYS handle hypothermic patients with extreme gentleness. And remember: NOT DEAD UNTIL WARM AND DEAD — prolong resuscitation!
Why it works
The micro-story creates a cautionary emotional memory. The Christmas ornament analogy for a fragile cold heart is vivid and culturally familiar in the Philippines.
Example usage
NLE question: 'A hypothermic patient is being transported. What precaution is most important?' Answer: Handle the patient very gently — sudden movements can trigger ventricular fibrillation in a cold, irritable heart.
Recall trigger
The ice patient dying from rough transfer — glass ornament heart
Hypothermia Mantra — Not Dead Until Warm and Dead
Memory aid
Rhyme: 'NOT DEAD UNTIL WARM AND DEAD — keep the CPR going, stay ahead. A cold brain is protected, not gone for good — rewarm first, then decide as you should!' This means: in hypothermic cardiac arrest, NEVER stop resuscitation just because vital signs are absent. The cold protects the brain. Continue CPR, rewarm aggressively, and reassess AFTER the patient reaches normothermia.
Why it works
Rhymes create auditory memory hooks that persist under exam pressure. The phrase 'not dead until warm and dead' is itself a medically accepted maxim — doubly memorable.
Example usage
NLE question: 'A drowning victim is pulseless with a temperature of 28°C. Should CPR be stopped?' Answer: No — follow 'not dead until warm and dead.' Continue CPR and rewarm before declaring death.
Recall trigger
Chant the rhyme: 'Not dead until warm and dead'
Near-Drowning — Hypoxia is the Killer
Memory aid
Visualize a SINKING SHIP where the crew (oxygen molecules) is trapped underwater. The ONLY rescue is to pull them up (airway, ventilation, CPR). NOTHING ELSE MATTERS until air reaches the lungs. Also: after rescue, watch for SECONDARY DROWNING — hours later the lungs fill with fluid (delayed pulmonary edema). Picture a rescued sailor who 'seems fine' but later the ship sinks again — inside his lungs. Salt water vs. fresh water = DOES NOT MATTER in acute management — hypoxia kills either way.
Why it works
The sinking ship and 'secondary sinking' image creates a two-stage memory: immediate rescue (oxygenation) and delayed danger (secondary drowning). The visual is dramatic and unforgettable.
Example usage
NLE question: 'A child appears recovered after near-drowning. What should the nurse do?' Answer: Observe for delayed pulmonary edema (secondary drowning) — can develop hours later even in seemingly recovered patients.
Recall trigger
Sinking ship — rescue = oxygen; secondary sinking = delayed pulmonary edema
Snakebite Management — What NOT to Do
Memory aid
Remember 'NO ICE CUTS' for snakebite DON'Ts: No Ice (vasoconstricts and worsens tissue damage), No Incision (cut-and-suck is a myth and causes infection), No Constriction (no arterial tourniquet). The DO's: Immobilize the limb AT OR BELOW heart level, Keep calm (slow venom spread), Mark swelling with time, Give ANTIVENOM for signs of envenomation, Transport urgently. Picture a snake saying 'NO ICE CUTS' — because those actions make it angrier (worse outcomes).
Why it works
The 'NO ICE CUTS' mnemonic is short, vivid, and memorable. Snake imagery reinforces the context.
Example usage
NLE question: 'A patient was bitten by a snake. Which intervention is CONTRAINDICATED?' Answer: Applying ice, cutting the wound, or using an arterial tourniquet — all are contraindicated (NO ICE CUTS).
Recall trigger
The snake holding a 'NO ICE CUTS' sign
Inhalation Injury — Signs and Early Intubation
Memory aid
Remember 'FRESH SOOT' for signs of inhalation injury: Facial burns, Respiratory distress, Eyebrow/nasal hair singed, Stridor, Hoarseness, Soot in mouth/nose, Oropharyngeal burns, Oxygen saturation dropping. And the rule: INTUBATE EARLY — like a flood, airway edema RISES FAST. Once the water level (edema) is too high, you can't get a tube in. Early intubation = the sandbag before the flood.
Why it works
FRESH SOOT naturally relates to fire/burn context, making the mnemonic easy to recall in the right clinical scenario. The flood analogy makes urgency vivid.
Example usage
NLE question: 'A burn patient has singed nasal hairs and hoarseness. What is the priority?' Answer: Prepare for early endotracheal intubation before airway edema closes the airway — signs of inhalation injury (FRESH SOOT).
Recall trigger
FRESH SOOT signs + sandbag before the flood = intubate early
Hemorrhage is #1 Preventable Trauma Death
Memory aid
Story: 'Marco arrived at the ER alert after a motorcycle crash. His head wound looked dramatic. The nurse focused on the head. Meanwhile, his femur fracture was bleeding 1–2 liters into his thigh — silent, occult, deadly. Thirty minutes later, Marco's BP crashed. The dramatic wound was the distraction; the silent bleeding was the killer.' Lesson: HEMORRHAGE IS THE LEADING PREVENTABLE TRAUMA DEATH. Direct pressure first, tourniquet if uncontrolled limb bleeding — don't let the dramatic distract from the deadly.
Why it works
The dramatic vs. silent wound contrast creates a memorable clinical lesson. Marco's name adds Filipino relatability. The story teaches prioritization through emotional consequence.
Example usage
NLE question: 'A trauma patient has a dramatic facial laceration and a thigh injury. Which is managed first?' Answer: Control hemorrhage — the thigh (potential femur fracture) can cause massive occult bleeding. Hemorrhage is the #1 preventable trauma death.
Recall trigger
Marco's dramatic head wound hiding the silent femur bleed
Acetaminophen Poisoning — NAC Most Effective Within 8 Hours
Memory aid
Think of NAC (N-Acetylcysteine) as a FIREFIGHTER arriving at a house (the liver). Acetaminophen toxicity starts a fire (hepatic necrosis) by depleting glutathione. If the firefighter (NAC) arrives WITHIN 8 HOURS, the fire is small and manageable — the liver is saved. After 8 hours, the fire spreads and becomes harder to control. Beyond 24 hours, the house may be lost. TIME IS LIVER. Remember: '8-hour window = NAC saves the liver.'
Why it works
The firefighter-house analogy makes the mechanism (depleting glutathione) and the time window viscerally understandable. 'TIME IS LIVER' parallels 'time is brain' familiar from stroke education.
Example usage
NLE question: 'A patient ingested 30 tablets of paracetamol 6 hours ago. What is the priority intervention?' Answer: Administer N-Acetylcysteine (NAC) immediately — most effective within 8 hours to prevent hepatic necrosis.
Recall trigger
Firefighter NAC arriving within 8 hours to save the liver-house from paracetamol fire
Naloxone for Opioid Overdose — Duration Mismatch
Memory aid
Naloxone is like a SHORT-TERM SUBSTITUTE TEACHER: it covers the class (reverses respiratory depression) but leaves before the regular teacher (the opioid) does. The opioid outlasts the naloxone. So you must REPEAT THE DOSE — or the respiratory depression returns. Think: 'Naloxone is SHORT, the opioid is LONG — keep the substitute coming back.' Titrate to RESTORE BREATHING, not to full consciousness.
Why it works
The substitute teacher analogy makes the pharmacokinetic mismatch intuitive. It directly explains why repeated dosing is needed without requiring pharmacology knowledge.
Example usage
NLE question: 'A patient was given naloxone for opioid overdose and regained consciousness. One hour later, he is again unresponsive. What should the nurse do?' Answer: Administer another dose of naloxone — opioid duration may outlast naloxone's short effect.
Recall trigger
Short substitute teacher (naloxone) vs. long regular teacher (opioid) — repeat the dose!
Urine Output Target in Burn Resuscitation — 0.5 mL/kg/hr
Memory aid
Chunk it: 'HALF a mL per KILO per HOUR for adults in burns.' 0.5 mL/kg/hr. Remember: 'Point-five to survive.' For electrical burns and children, the target is higher — but for standard adults, 'HALF is the goal, LESS means give MORE fluids, MORE means slow DOWN.' Urine output = your window into kidney perfusion during burn resuscitation.
Why it works
Chunking '0.5 mL/kg/hr' into 'half a mL per kilo per hour' and the phrase 'point-five to survive' creates a phonetic hook that is short and exam-ready.
Example usage
NLE question: 'A 70 kg burn patient has urine output of 20 mL/hr. What should the nurse do?' Answer: Increase IV fluids — target is 0.5 mL/kg/hr = 35 mL/hr for this patient; current output is inadequate ('point-five to survive').
Recall trigger
'Point-five to survive' — 0.5 mL/kg/hr urine output in adult burn resuscitation
Heat Stroke — Antipyretics Do NOT Work
Memory aid
Antipyretics work by resetting the brain's thermostat (hypothalamic set point). In heat stroke, the THERMOSTAT IS FINE — the problem is that the ROOM IS JUST TOO HOT (environmental heat overload). Giving antipyretics to a heat stroke patient is like spraying a thermostat with cool water when your entire house is on fire. USELESS. The fix: REMOVE THE HEAT — strip clothing, cool the skin (evaporation, ice packs to groin/axillae/neck), cool IV fluids.
Why it works
The thermostat-room analogy perfectly captures why antipyretics fail mechanically. The house fire image reinforces urgency and the futility of the wrong treatment.
Example usage
NLE question: 'A heat stroke patient has temp of 41°C. The family asks for paracetamol. What is the correct response?' Answer: Paracetamol/antipyretics are NOT effective in heat stroke — the cause is external heat load, not a raised hypothalamic set point. Cool the patient directly.
Recall trigger
Thermostat is fine — the room (environment) is the problem. Antipyretics = water on thermostat, not the fire
Flumazenil — Cautious Use in Benzodiazepine Overdose
Memory aid
Story: 'The ER nurse gave flumazenil to reverse a benzodiazepine overdose. Perfect! But the patient was also a chronic benzodiazepine user and had mixed it with cocaine. Minutes later — seizures! Flumazenil reversed the sedation, but the unmasked stimulants and benzo-withdrawal triggered uncontrolled seizures.' Lesson: FLUMAZENIL is the antidote for benzos, but use with GREAT CAUTION — it can cause seizures in chronic users or mixed overdoses. It is NOT given routinely.
Why it works
The unexpected seizure in the story creates a dramatic 'plot twist' that lodges flumazenil's danger in memory. It clarifies WHEN NOT to use it — the harder clinical question.
Example usage
NLE question: 'Should flumazenil be routinely given to all benzodiazepine overdose patients?' Answer: No — flumazenil can precipitate seizures in chronic benzodiazepine users or mixed overdoses. It is used with great caution, not routinely.
Recall trigger
The nurse who caused seizures by giving flumazenil — caution in chronic users and mixed OD
Revision game
I am the leading preventable cause of death in trauma patients. I can hide silently inside the chest, abdomen, pelvis, or thigh while a dramatic wound distracts everyone. Who am I?
Answer
Hemorrhage (occult internal bleeding)
Memory link
A15 — Marco's dramatic head wound hiding the silent femur bleed
I am three wheels on a deadly tricycle. Once one of us starts spinning, the others follow — making each other worse. I kill trauma patients who seem stable. What are my three components?
Answer
The Lethal Triad: Hypothermia, Acidosis, Coagulopathy (HAC)
Memory link
A2 — The HAC death spiral tricycle
A patient in an enclosed house fire has SpO2 of 99% on the monitor. The nurse smiles and says everything is fine. Why is the nurse DANGEROUSLY WRONG?
Answer
Pulse oximetry is falsely normal in CO poisoning — it cannot distinguish carboxyhemoglobin from oxyhemoglobin. Treat with 100% O2.
Memory link
A5 — Nurse Cora's lying pulse oximeter
I am a firefighter with an 8-hour window to save a liver that is being burned from the inside by a common painkiller. If I arrive late, the fire spreads and the liver may be lost. What am I?
Answer
N-Acetylcysteine (NAC) — antidote for acetaminophen/paracetamol toxicity
Memory link
A16 — The firefighter NAC arriving within 8 hours
I am a short-term substitute teacher. I do my job well, but I leave before the regular teacher does. If no one brings me back, the classroom falls into chaos again. What medicine am I?
Answer
Naloxone — must be repeated because opioids outlast its duration of action
Memory link
A17 — Short substitute teacher (naloxone) vs. long regular teacher (opioid)
A patient with heat stroke has a temperature of 41°C. A family member insists on giving paracetamol. Why is paracetamol completely USELESS here?
Answer
Heat stroke is caused by environmental heat overload, not a raised hypothalamic set point. Antipyretics reset the thermostat — but the thermostat is already normal. Cool the patient externally instead.
Memory link
A19 — Thermostat is fine, the room is on fire
I am an antidote that can cause the very problem I am supposed to prevent. Give me to a chronic user and their brain may storm with uncontrolled electricity. I am used with extreme caution, not routinely. What am I?
Answer
Flumazenil — antidote for benzodiazepines, but can precipitate seizures in chronic users or mixed overdoses
Memory link
A20 — The nurse who caused seizures by giving flumazenil
A hypothermic patient has no pulse and no breathing after 30 minutes of CPR. A nurse wants to stop. What is the correct maxim that guides resuscitation in this case?
Answer
Not dead until warm and dead — continue CPR and rewarm before declaring death in hypothermic cardiac arrest
Memory link
A11 — The 'not dead until warm and dead' rhyme
Formula mnemonics
Parkland Formula: Total Fluid (mL) = 4 × Weight (kg) × %TBSA; give ½ in first 8 hours (from time of injury), ½ in next 16 hours. Fluid = Lactated Ringer's.
Mnemonic
FOUR KILOS BURN in LR for 24 — HALF in 8, HALF in 16. Say it out loud: '4-K-B-LR-24, half-8, half-16.' Picture 4 lechon rods (4 mL), a kilo weight scale (kg), a burning percentage (%TBSA), dripping LR fluid for 24 hours — with half the drip in the first 8 hours.
When to use
Used in moderate to major burns (typically ≥15-20% TBSA in adults, ≥10% in children). Always titrate based on urine output: target 0.5 mL/kg/hr for adults, 1 mL/kg/hr for children and electrical burns.
What each part means
4 = the mL constant per formula; kg = patient's weight in kilograms; %TBSA = percentage of total body surface area burned (partial and full thickness only, NOT superficial); LR = Lactated Ringer's is the preferred isotonic crystalloid; 24h = total infusion period; ½ in first 8h = first half given urgently because capillary leak is greatest immediately after burn; timing starts from TIME OF INJURY, not hospital arrival.
Rule of Nines: Head = 9%, Each Arm = 9%, Anterior Trunk = 18%, Posterior Trunk = 18%, Each Leg = 18%, Perineum = 1%. Total = 100%.
Mnemonic
9-9-18-18-18-18-1: Say 'One Nine up top, two 9s for the arms, four 18s for the body and legs, 1 for the bottom.' Or use the BODY CROSS: Stand with arms out — head (1 nine), each arm (1 nine each = 2 nines), front body (2 nines), back body (2 nines), each leg (4 nines = 2 per leg). Poke the perineum for the lonely 1%.
When to use
Used immediately during burn assessment to calculate %TBSA for fluid resuscitation, triage, and wound management decisions. Only count partial-thickness and full-thickness burns — NOT superficial (first-degree) burns.
What each part means
Head/neck = 9%; Right arm = 9%, Left arm = 9%; Anterior trunk (chest + abdomen) = 18%; Posterior trunk (upper + lower back) = 18%; Right leg = 18%, Left leg = 18%; Perineum = 1%. Note: This is for ADULTS. In children, use the Lund-Browder chart because the head is proportionally larger.
Urine Output Target in Burns: Adults = 0.5 mL/kg/hr; Children and Electrical Burns = 1 mL/kg/hr.
Mnemonic
'Point-five to survive for adults; One-to-one for children and electric.' If urine output is LOW (below target), INCREASE fluids. If urine output is HIGH (above target), SLOW DOWN fluids. Urine output = your kidney's report card during burn resuscitation.
When to use
Continuous monitoring throughout burn fluid resuscitation. Insert a Foley catheter in all major burn patients for accurate hourly measurement. Titrate IV fluid rate every hour based on urine output — not on a fixed calculated rate.
What each part means
0.5 mL/kg/hr = minimum acceptable urine output for adults showing adequate kidney perfusion; 1 mL/kg/hr = higher target for children (more vulnerable kidneys) and electrical burns (myoglobinuria from muscle destruction requires higher output to flush kidneys and prevent acute tubular necrosis).
Quick recall chains
Primary Survey of Multiple Trauma — ABCDE Chain
Recall test
Without looking: Name all 5 steps of the trauma primary survey in order. What is the FIRST step and why is C-spine included?
Memory chain
A taxi driver named ABCDE picks up trauma patients in ORDER: First he checks if the ROAD IS CLEAR (Airway + C-spine). Then he checks his ENGINE (Breathing). Then his FUEL TANK (Circulation — no leaks!). Then his GPS SCREEN (Disability — GCS). Finally he opens ALL WINDOWS to check everything and turns on the HEATER (Exposure + prevent hypothermia). He NEVER skips a step — every stop matters.
Items to remember
- Airway with Cervical Spine Control
- Breathing — identify lethal chest injuries
- Circulation — hemorrhage control, 2 large-bore IVs
- Disability — GCS and pupils
- Exposure — undress fully, prevent hypothermia
Snakebite Management — Do's and Don'ts Chain
Recall test
Name 3 things you should NEVER do for a snakebite. Name 2 things you MUST do immediately.
Memory chain
Remember 'IMKT-A-NIC': I-Immobilize, M-Mark swelling, K-Keep calm, T-Transport, A-Antivenom. Then the 3 NOs: 'NO ICE CUTS' — No Ice, No Cuts (incision), No Constriction (tourniquet). Story: 'A bitten farmer IMMOBILIZED his arm, MARKED the swelling, stayed CALM, was TRANSPORTED fast, got ANTIVENOM — and the nurse yelled: NO ICE CUTS!'
Items to remember
- Immobilize limb at or below heart level
- Keep patient calm and still
- Mark advancing swelling with time
- Transport urgently
- Give antivenom for envenomation
- NO ice
- NO cut-and-suck
- NO arterial tourniquet
Key Antidote Pairs — Chain of 8
Recall test
A patient ingested rat poison (warfarin-based). What antidote is given? A child swallowed iron supplements. What chelating agent is used?
Memory chain
A story: 'NURSE NADINE (Naloxone for Opioids) gave NAC to the ACETAMINOPHEN patient, then called ATROPINE + PRALIDOXIME for the farmer with organophosphates. She used the FAB trick for DIGOXIN, was CAUTIOUS with FLUMAZENIL for the benzo overdose, gave GLUCAGON for the BETA-BLOCKER patient, called VITAMIN K to reverse WARFARIN, and finally gave DEFEROXAMINE to the child who ate IRON tablets.' Each patient has a name that rhymes with the antidote.
Items to remember
- Opioids → Naloxone
- Acetaminophen → N-Acetylcysteine (NAC)
- Organophosphates → Atropine + Pralidoxime
- Digoxin → Digoxin-specific Fab
- Benzodiazepines → Flumazenil (caution)
- Beta-blockers → Glucagon
- Warfarin → Vitamin K
- Iron → Deferoxamine
Burn Care Priorities — Sequential Chain
Recall test
A patient arrives with facial burns and hoarseness. What is the FIRST priority? What formula guides fluid resuscitation?
Memory chain
Use 'AIR-STOP-CO-FLUID-URINE-COVER-PAIN-WARM': AIR first (intubate), STOP burning, CO suspect give O2, FLUID using Parkland, URINE target point-five, COVER wounds, PAIN control, WARM the patient. Imagine a burn nurse doing a DANCE called the 'AIR-STOP-CO-FLUID-URINE-COVER-PAIN-WARM' — each move in order.
Items to remember
- Airway first — intubate early for inhalation injury
- Stop the burning process — remove clothing/jewelry
- Suspect CO poisoning in enclosed fire — give 100% O2
- Fluid resuscitation — Parkland formula
- Titrate to urine output 0.5 mL/kg/hr
- Cover wounds — clean dry dressings
- Provide analgesia
- Maintain warmth
Heat Illness Comparison — Exhaustion vs Stroke
Recall test
What is the ONE feature that distinguishes heat stroke from heat exhaustion? Why don't antipyretics work in heat stroke?
Memory chain
YELLOW light = Heat EXhaustion (brain EXists, body EXhausted). RED light = Heat STROKE (brain STROKEd out, temp >40°C). For YELLOW: rest, fluids, shade. For RED: STRIP AND COOL NOW — ice at the groin, axillae, neck — do NOT give paracetamol (wrong target). Red = emergency, Yellow = urgent but stable.
Items to remember
- Heat Exhaustion: heavy sweating, weakness, nausea, dizziness, INTACT mental status, normal or mildly elevated temp
- Heat Stroke: core temp >40°C, ALTERED mental status (confusion/seizures/coma), medical emergency
- Heat Exhaustion Treatment: cool place, remove clothing, oral/IV fluids
- Heat Stroke Treatment: IMMEDIATE aggressive cooling — strip, evaporate, ice packs to groin/axillae/neck, cooled IV fluids, NO antipyretics
Diagrams
Trauma, Poisoning and Environmental Emergencies — Master Mind Map
A comprehensive mind map showing all major topics in Trauma, Poisoning and Environmental Emergencies. Use this as a starting point for each study session to orient yourself to the big picture before diving into individual concepts. Each branch connects to specific memory anchors in this chapter.
Poisoning Management Flowchart — From Ingestion to Antidote
A step-by-step decision flowchart for managing poisoning and overdose cases. Follow the diamond decision points from airway assessment through toxin identification, decontamination decisions, and specific antidote administration. This flowchart covers the full clinical reasoning chain for the NLE poisoning questions.
Heat Illness Decision and Management Flowchart
A clinical decision flowchart distinguishing Heat Exhaustion from Heat Stroke based on mental status assessment. The branching paths show the dramatically different urgency and treatment approaches. Key teaching point: altered mental status = Heat Stroke = emergency. The flowchart also highlights why antipyretics are ineffective in heat stroke.
Hypothermia Severity and Rewarming Strategy — State Diagram
A state diagram showing the progression of hypothermia from mild to cardiac arrest, with the appropriate rewarming strategy at each severity level. The key teaching point is that rewarming escalates in intensity as severity increases, and cardiac arrest in hypothermia requires prolonged resuscitation until the patient is rewarmed.
Burns — Timeline of Critical Interventions
A chronological timeline of burn patient management from the first minutes through the first 24+ hours. This timeline helps students visualize the time-sensitive nature of burn care, particularly the Parkland formula timing (half in first 8 hours from TIME OF INJURY) and continuous urine output monitoring.