COVID-19 Emergency Care: EMT Guide

COVID-19: Emergency Assessment, Oxygen Care and Clinical Management

Why emergency teams still need COVID-19 skills. COVID-19 ranges from asymptomatic infection to hypoxaemic pneumonia, thromboembolism, sepsis, myocarditis and multiorgan failure. Risk is shaped by age, pregnancy, vaccination, comorbidities, immune status and time since symptom onset. EMTs must triage safely, measure oxygenation accurately, recognise silent hypoxaemia, prevent transmission and escalate early. Treatment recommendations change with variants, product availability and national policy, so use the current Uganda Ministry of Health and facility protocol.

1. Learning objectives

Describe SARS-CoV-2 transmission, clinical severity categories and risk factors for deterioration.
Perform safe triage, ABCDE assessment, oxygen assessment and infection prevention.
Recognise severe/critical COVID-19, sepsis, ARDS, thromboembolism and cardiac complications.
Explain supportive care, antiviral eligibility, corticosteroid principles and what treatments to avoid.
Plan nursing observations, escalation, rehabilitation, discharge and prevention education.

2. Cause and transmission

COVID-19 is caused by SARS-CoV-2, an enveloped respiratory virus transmitted mainly through infectious respiratory particles and aerosols, especially in crowded or poorly ventilated spaces. Transmission can occur before symptoms and from people with mild or no symptoms. Risk increases with close, prolonged indoor contact, poor ventilation and inadequate masking during high transmission.

Older adults, people with chronic heart/lung/kidney disease, diabetes, obesity, cancer, immune suppression, pregnancy and incomplete vaccination are more likely to develop severe illness, but any person can deteriorate.

3. Clinical severity categories

Category	Typical findings	EMT priority
Asymptomatic/presymptomatic	Positive test without symptoms	IPC, risk assessment, monitoring and public-health advice.
Mild	Fever, sore throat, cough, fatigue, headache, myalgia, anosmia/ageusia, nausea or diarrhoea without hypoxia	Check risk factors, oxygen saturation and ability to drink; safety-net carefully.
Moderate	Clinical or radiographic pneumonia but no severe hypoxaemia	Medical assessment, serial SpO₂/vitals and consideration of eligible antiviral therapy.
Severe	Respiratory rate rise, SpO₂ below target, extensive pneumonia or increased work of breathing	Hospitalise, give oxygen, evaluate sepsis/PE and escalate early.
Critical	ARDS, respiratory failure, shock, cardiac injury, thrombosis, renal failure or multiorgan dysfunction	Resuscitation/ICU, advanced respiratory support and organ-specific care.

4. Initial contact and infection prevention

Screen at entry for respiratory symptoms, exposure, test status and high-risk conditions.
Provide a well-fitting mask to the patient if tolerated; separate from crowded waiting areas.
Perform hand hygiene; use appropriate mask/respirator, eye protection, gown and gloves based on the task and aerosol risk.
Use a well-ventilated area and limit staff in the room; keep a contact/exposure log during high-risk procedures.
Use dedicated or disinfectable equipment and clean high-touch surfaces according to facility policy.

5. Focused history

Day of illness, progression, fever, cough, dyspnoea, chest pain, fatigue, confusion and ability to drink.
Home SpO₂ readings, if available, and whether oxygen was used.
Vaccination, previous COVID-19, recent contact/travel and other respiratory infections.
Age, pregnancy, diabetes, hypertension, heart/lung/kidney disease, obesity, HIV, cancer and immune-suppressive medicines.
Current medicines, anticoagulants, allergies and recent antiviral/corticosteroid use.
Reduced mobility, unilateral leg swelling, pleuritic pain or haemoptysis suggesting pulmonary embolism.

6. ABCDE and oxygen assessment

A – Airway

Assess speech, secretions, fatigue, altered consciousness and aspiration; prepare a controlled airway plan before exhaustion.

B – Breathing

Measure respiratory rate, work of breathing, SpO₂ and mental status. Check probe placement, perfusion, nail products and waveform; repeat abnormal readings.
Give oxygen for hypoxaemia or respiratory distress; escalate from nasal cannula/mask to high-flow or ventilatory support under trained clinicians.

C – Circulation

Assess pulse, BP, capillary refill, hydration, urine output and shock. Avoid unmonitored fluid loading when ARDS or cardiac/renal disease is possible.

D – Disability

Check glucose, AVPU/GCS, delirium and focal signs; consider hypoxia, sepsis, stroke, thrombosis and metabolic causes.

E – Exposure

Inspect for cyanosis, rash, unilateral leg swelling, pressure injury and signs of another infection while maintaining warmth and dignity.

Emergency red flags: SpO₂ below local target, severe breathlessness, RR rapidly rising, cyanosis, inability to speak full sentences, chest pain, confusion, syncope, shock, haemoptysis, unilateral leg swelling, seizures, persistent vomiting or rapid deterioration.

7. Investigations

Test/assessment	What it helps determine	Caution
Serial vitals, SpO₂ and exertional/position response	Trajectory and oxygen requirement	Do not send an unstable patient walking for a test.
Glucose, FBC, electrolytes, renal/liver tests	Comorbidity, organ injury, anaemia, electrolyte effects and medication safety	Repeat based on severity; do not interpret in isolation.
COVID-19 antigen/NAAT testing	Support diagnosis and IPC pathway	A negative test does not exclude early disease when clinical suspicion is high.
Chest X-ray/ultrasound/CT	Pneumonia, oedema, effusion, PE or alternative diagnosis	Stabilise oxygenation first and use IPC during movement.
ECG/troponin, D-dimer/CTPA where indicated	Myocarditis, acute coronary syndrome or pulmonary embolism	Use clinical probability; D-dimer is not a stand-alone diagnosis.
Blood cultures/lactate	Sepsis or bacterial co-infection	Antibiotics are not routine for viral COVID-19 without another indication.

8. Immediate and pre-hospital management

Mask/separate the patient, put on task-appropriate PPE and notify the receiving facility.
Position upright or in a comfortable posture; use awake proning only when alert, supervised and not contraindicated.
Give oxygen for hypoxaemia or respiratory distress and monitor response continuously.
Check glucose and treat hypoglycaemia; assess perfusion and temperature.
Use cautious isotonic fluid for shock/dehydration with lung reassessment; do not delay transfer for nonessential tests.
Do not give antibiotics, corticosteroids or anticoagulants automatically; base them on severity, co-infection and clinician protocol.
Call ahead with SpO₂, oxygen device/flow, vital-sign trends, comorbidities, test status and PPE requirements.

9. Treatment by severity

9.1 Mild disease

Rest, fluids, paracetamol/acetaminophen when appropriate and monitoring for deterioration.
Assess high-risk patients promptly for time-sensitive outpatient antiviral options according to current national availability and eligibility.
Do not use systemic corticosteroids in patients who do not require supplemental oxygen unless another indication exists.
Provide mask/ventilation, hand hygiene, household protection and return precautions.

9.2 Severe or critical disease

Hospitalise, provide oxygen to the recommended target and monitor respiratory effort, SpO₂, blood gases and mental state.
WHO recommends systemic corticosteroids for severe/critical COVID-19 under protocol; do not start them for mild non-hypoxaemic disease.
Consider antiviral therapy and immune-modulating therapy for eligible patients according to current WHO/national guidance, timing, contraindications and availability.
Investigate/treat bacterial sepsis, pulmonary embolism, myocardial injury, acute kidney injury and other complications.
Escalate to high-flow nasal oxygen, non-invasive ventilation or invasive ventilation with trained critical-care staff and aerosol precautions.

10. Respiratory support and proning

Reassess oxygen device fit, flow, respiratory rate, work of breathing and mental status after every change.
Awake proning may improve oxygenation in selected alert patients who can reposition safely; it is not a substitute for escalation.
Use high-flow/non-invasive ventilation only where monitoring, trained staff, oxygen supply and aerosol-risk controls are adequate.
Intubate before catastrophic fatigue when indicated; use a senior airway operator, pre-oxygenation, viral filters and a clear post-intubation plan.
For ARDS, use lung-protective ventilation, appropriate PEEP and prone ventilation under ICU protocol.

11. Complications and advanced care

Complication	Clues	Management direction
ARDS	Increasing oxygen requirement, bilateral infiltrates, severe work of breathing	ICU, lung-protective ventilation, prone positioning and fluid review.
Thromboembolism	Sudden pleuritic pain, unexplained hypoxia, tachycardia, haemoptysis or leg swelling	Urgent diagnostic pathway and anticoagulation only after clinician risk/bleeding assessment.
Sepsis/shock	Hypotension, confusion, cool skin, oliguria, rising lactate	Cultures, antimicrobials for probable co-infection, cautious fluids and vasopressors when indicated.
Cardiac injury	Chest pain, arrhythmia, heart failure or troponin rise	ECG/echo, cardiac and critical-care review.
AKI/metabolic injury	Oliguria, rising creatinine, electrolyte/acid-base changes	Perfusion review, renal-dose medications, avoid nephrotoxins and consider renal support.
Neurological complications	Delirium, stroke, seizures, encephalopathy	Glucose, oxygen, neuro assessment, imaging and specialist management.

12. Medication safety and stewardship

Use only authorised, current antiviral regimens; check symptom onset, renal/hepatic function, pregnancy, interactions and availability.
Systemic corticosteroids are for severe/critical hypoxaemic disease under protocol, not routine mild disease.
Do not use antibiotics solely for a positive COVID-19 test without evidence of bacterial infection.
Assess VTE prophylaxis/anticoagulation according to admission status, bleeding risk, platelet count, renal function and local protocol.
Review chronic medicines, avoid abrupt withdrawal of essential treatment and check for interactions with antivirals.
Paracetamol may relieve fever/pain within safe limits; avoid duplicate combination products and NSAIDs when a bleeding/renal contraindication exists.

13. Nursing care and monitoring

Priority	Care	Escalate when
Oxygenation	Serial SpO₂, respiratory rate/effort, device/flow, ABG when available and response to position	Rising oxygen need, fatigue, cyanosis, confusion or inability to speak
Perfusion	Pulse/BP/capillary refill, temperature, urine output, glucose and fluid balance	Shock, oliguria, rising lactate or worsening mental status
IPC	Hand hygiene, PPE, ventilation, isolation, equipment cleaning and safe waste	PPE breach, exposure or inability to maintain separation
Medication	Timely antiviral/steroid/anticoagulant administration, allergy/interaction checks and adverse-effect monitoring	Hyperglycaemia, bleeding, liver/renal injury, infusion reaction or delirium
Mobility/nutrition	Pressure care, early mobilisation when stable, swallow/nutrition assessment and psychological support	Weakness, falls, delirium, aspiration or persistent functional decline

14. Special populations

Pregnancy: assess maternal oxygenation and fetal wellbeing; involve obstetrics and use pregnancy-appropriate therapies.
Children: most have mild/moderate illness, but monitor for hypoxia, dehydration, pneumonia and MIS-C-like inflammatory illness.
Older adults: delirium, falls, weakness or hypothermia may replace fever and cough.
Immunocompromised: symptoms may be prolonged; specialist antiviral/extended-treatment decisions may be required.
Diabetes/heart/kidney disease: monitor glucose, volume status, renal function and drug interactions carefully.

15. Discharge, isolation and long COVID

Discharge only when oxygenation, work of breathing, hydration, mental state and home support are acceptable.
Give clear instructions on mask use, ventilation, hand hygiene, household protection and current national isolation advice.
Return urgently for worsening breathlessness, chest pain, confusion, blue lips, fainting, low SpO₂, persistent vomiting or reduced urine.
Arrange review for persistent fatigue, breathlessness, chest pain, cognitive symptoms, mood change or reduced exercise tolerance.
Explain vaccination/booster recommendations according to current Uganda policy and individual risk.

16. Clinical scenarios

Scenario 1 – Silent hypoxaemia. A patient with mild cough appears comfortable but SpO₂ is 86% on repeat measurement with good waveform. The EMT confirms probe position, sits the patient upright, applies oxygen, repeats observations, alerts the receiving facility and transfers urgently. Appearance alone is not used to rule out severe disease.

Scenario 2 – Mild COVID-19 with risk factors. A 68-year-old with diabetes presents on day 3 with fever and cough but normal oxygenation. The clinician assesses eligibility and timing for an authorised antiviral, reviews interactions/renal function, provides safety-net advice and arranges follow-up. Steroids are not started simply because the test is positive.

Scenario 3 – Severe disease with shock. A patient with pneumonia becomes confused, hypotensive and oliguric. The team uses PPE, oxygen, ABCDE, glucose, cultures, sepsis management, cautious fluid assessment and early ICU/vasopressor escalation while evaluating bacterial co-infection and thromboembolism.

17. Common errors

Trusting a single normal SpO₂ or visual appearance.
Giving systemic steroids to non-hypoxaemic mild disease.
Prescribing antibiotics automatically for every positive test.
Ignoring PE, myocardial injury, bacterial sepsis or alternative pneumonia.
Overloading a patient with fluids despite ARDS or heart/renal disease.
Performing aerosol-generating procedures without preparation and PPE.
Discharging without oxygen, return precautions, follow-up and household IPC education.

18. Quick revision questions

What distinguishes mild, severe and critical COVID-19?
Why can pulse oximetry be misleading?
List six red flags requiring urgent escalation.
When are systemic corticosteroids indicated?
Why are antibiotics not routine for viral COVID-19?
What complications should EMTs actively screen for?
How should oxygen and respiratory effort be monitored?
Which patients may need time-sensitive antiviral assessment?
What PPE and ventilation measures reduce transmission?
What discharge safety-net advice is essential?

19. Key takeaways