Basic Life Support and Using an Automated External Defibrillator
This element covers the essential skills and knowledge required to provide basic life support (BLS) to adults, including the assessment of responsiveness, airway management, rescue breathing, and cardiopulmonary resuscitation (CPR). It also focuses on the safe and effective use of an automated external defibrillator (AED), integrating defibrillation into the chain of survival. Learners gain hands-on competence in managing both breathing and non-breathing unresponsive casualties, ensuring they can respond confidently and correctly in real-life emergencies.
Assessment criteria
Quick Revision Summary (Key Takeaway)
The NOCN Level 2 Award in Basic Life Support and the Safe Use of an Automated External Defibrillator equips learners with the essential skills to perform CPR, use an AED safely, and manage a casualty until professional help arrives. This qualification covers the chain of survival, legal and ethical considerations, and practical procedures for adults, children, and infants.
Topic Overview
Basic Life Support (BLS) is a set of life-saving techniques used to support a person who has stopped breathing or whose heart has stopped beating. This qualification focuses on the practical skills of cardiopulmonary resuscitation (CPR) and the safe use of an automated external defibrillator (AED). BLS is the foundation of emergency care and is essential for anyone working in health and social care, as it can mean the difference between life and death in the critical minutes before professional help arrives.
The course covers the chain of survival, which includes early recognition of cardiac arrest, early CPR, early defibrillation, and post-resuscitation care. Learners develop the confidence to assess a casualty, perform high-quality chest compressions and rescue breaths, and operate an AED safely. The qualification also addresses legal and ethical considerations, such as consent and duty of care, and the importance of documentation and handover to emergency services.
In the context of health and social care, BLS skills are vital for care workers, support staff, and anyone who may be first on the scene of an emergency. The NOCN Level 2 Award is a vocationally-related qualification that combines theoretical knowledge with practical assessment, ensuring learners are prepared to respond effectively in real-world situations. It also aligns with national guidelines from the Resuscitation Council (UK), ensuring best practice.
Key Concepts
Core ideas you must understand for this topic
- →The Chain of Survival: early recognition and call for help, early CPR, early defibrillation, and post-resuscitation care.
- →The ABCDE approach: Airway, Breathing, Circulation, Disability, Exposure – used to systematically assess a casualty.
- →High-quality CPR: chest compressions of at least 5 cm deep (adults) at a rate of 100-120 per minute, allowing full chest recoil, and minimising interruptions.
- →Safe use of an AED: ensuring the area is dry, pads are placed correctly, and no one touches the casualty during analysis or shock delivery.
- →Legal and ethical considerations: obtaining consent, duty of care, and the importance of recording actions and handover to emergency services.
Learning Objectives
What you need to know and understand
- Demonstrate how to perform a primary survey on an unresponsive casualty to determine if they are breathing normally.
- Apply the correct technique to place a breathing unresponsive casualty into the recovery position.
- Perform effective chest compressions and rescue breaths on a non-breathing casualty according to Resuscitation Council UK guidelines.
- Identify the situations in which an automated external defibrillator is indicated and how to prepare the casualty for its use.
- Operate an automated external defibrillator following voice prompts, including correct pad placement and clearing during analysis and shock delivery.
- Outline the key steps in the chain of survival and the role of early defibrillation in improving survival rates.
Assessment Criteria
Key criteria assessors look for in your portfolio
- Award credit for correctly checking for danger, response, airway, and breathing (DRAB) before proceeding.
- Candidate must demonstrate opening the airway using head tilt-chin lift technique on a non-breathing casualty.
- Provide credit for maintaining the correct hand position and depth (5-6 cm) during chest compressions.
- Ensure the candidate checks for safety before AED use and correctly places pads as per manufacturer's instructions.
- Assessor to confirm that the candidate ensures no one touches the casualty during analysis and shock delivery.
- Credit given for stating the need to call for emergency services and retrieve the AED as part of the initial response.
Assessment Guidance
Guidance for achieving higher grades
- 💡When demonstrating CPR, always verbalize each step clearly to show understanding, even if the manikin does not provide realistic feedback.
- 💡Memorize the default sequence: Danger, Response, Shout for help, Airway, Breathing, Circulation/CPR (DRSABC) and apply it consistently during assessment.
- 💡Practice using the AED trainer until you are confident with the rhythm of voice prompts; always state 'stand clear' loudly.
- 💡Ensure you know the safety checks, such as removing nitroglycerin patches, shaving chest hair if excessive, and ensuring no metallic substances.
- 💡Always use the correct terminology, such as 'unresponsive and not breathing normally' rather than 'dead' or 'passed out'. This shows professional understanding.
- 💡When describing CPR, include specific details: compression depth (5-6 cm for adults), rate (100-120 per minute), and the ratio (30:2). These details are often required for full marks.
- 💡For AED use, mention the importance of following voice prompts and ensuring safety (e.g., checking for water, metal, or medication patches) before delivering a shock.
Common Mistakes
Common errors to avoid in your coursework
- Confusing agonal gasps with normal breathing, leading to delayed or withheld CPR.
- Not tilting the head sufficiently to open the airway, resulting in ineffective rescue breaths.
- Placing AED pads too close to pacemaker scars or not ensuring the chest is dry, which can cause reduced conductivity.
- Forgetting to shout for help or delegate someone to call emergency services before starting CPR.
- Hesitancy to use the AED in a female casualty due to concerns about removing clothing and bras.
- Misconception: You should check for a pulse before starting CPR. Correction: In BLS, you should not waste time checking for a pulse; instead, look for signs of life such as breathing. If the casualty is not breathing normally, start CPR immediately.
- Misconception: AEDs can shock a person who is not in cardiac arrest. Correction: AEDs are designed to analyse the heart rhythm and only advise a shock if a shockable rhythm (VF or pulseless VT) is detected. They will not shock a person with a normal heart rhythm.
- Misconception: Rescue breaths are not necessary if you are worried about infection. Correction: While using a pocket mask or face shield is recommended, rescue breaths are still a vital part of CPR for adults and children. If you are unwilling or unable to give breaths, perform compression-only CPR and continue until help arrives.
Revision Plan
How to revise this topic in 1–2 weeks
- 1Week 1: Focus on theory – learn the chain of survival, the BLS algorithm, and the legal/ethical aspects. Use flashcards to memorise key facts and ratios.
- 2Week 2: Practice practical skills – attend a hands-on session or use a manikin to practise CPR and AED use. Watch videos from the Resuscitation Council (UK) to see correct technique.
- 3Week 3: Consolidate with past paper questions and mock assessments. Focus on writing clear, structured answers for 6-mark questions.
- 4Week 4: Revise common misconceptions and examiner tips. Do a final review of all procedures and ensure you can explain each step confidently.
Exam Question Types
How this topic typically appears in the exam
- 📋Multiple-choice questions: Test knowledge of facts such as compression rates, ratios, and AED safety. Read each question carefully and eliminate obviously wrong answers.
- 📋Short-answer questions: Require brief explanations, e.g., 'Why is early defibrillation important?' Use key terms like 'ventricular fibrillation' and 'survival rate'.
- 📋Scenario-based questions: Present a situation and ask you to describe your actions. Structure your answer in chronological order, using the BLS algorithm as a framework.
- 📋Practical assessment: You will be observed performing CPR and using an AED. Demonstrate confidence, correct technique, and clear communication with bystanders.
Command Word Expectations (NOCN)
What examiners look for when using specific command words in this specification
Provide a detailed account of a procedure or concept, including steps in the correct order. For example, 'Describe how to perform CPR on an adult' – you must include all steps from checking danger to continuing cycles.
Give reasons or causes for a phenomenon. For example, 'Explain why early defibrillation improves survival' – you need to discuss the heart rhythm and the time factor.
Give a brief, factual answer without explanation. For example, 'State the compression-to-ventilation ratio for a child with two rescuers' – answer: '15:2'.
How Students Lose Marks (Examiner Pitfalls)
Common mark loss traps and how to write 100% full-mark answers
Step-by-Step Worked Solutions
Detailed solution breakdown for typical exam problems
Question: A 45-year-old man collapses in a shopping centre. You are the first aider. Describe the sequence of actions you would take, including the use of an AED, until the emergency services arrive.
- 1.Step 1: Ensure the scene is safe. Check for danger to yourself and others.
- 2.Step 2: Check for a response by gently shaking his shoulders and asking loudly, 'Are you alright?' If no response, shout for help and ask a bystander to call 999/112 and fetch an AED.
- 3.Step 3: Open the airway by tilting the head back and lifting the chin. Check for normal breathing for no more than 10 seconds. If not breathing normally, start CPR: 30 chest compressions at a rate of 100-120 per minute, pushing down 5-6 cm, followed by 2 rescue breaths.
- 4.Step 4: Continue CPR until the AED arrives. Turn on the AED and follow the voice prompts. Attach the pads to the bare chest as shown. Ensure no one touches the casualty while the AED analyses the rhythm.
- 5.Step 5: If a shock is advised, press the shock button after ensuring everyone is clear. Immediately resume CPR for 2 minutes, then follow the AED prompts again. Continue until emergency services take over or the casualty shows signs of life.
Question: Explain the importance of early defibrillation in the chain of survival and how the use of an AED improves outcomes in cardiac arrest.
- 1.Step 1: Define the chain of survival: early recognition and call for help, early CPR, early defibrillation, and post-resuscitation care.
- 2.Step 2: Explain that most sudden cardiac arrests are due to ventricular fibrillation (VF), a chaotic heart rhythm that stops effective pumping.
- 3.Step 3: State that defibrillation delivers an electric shock to the heart, which can stop the abnormal rhythm and allow the heart's natural pacemaker to re-establish a normal rhythm.
- 4.Step 4: Emphasise that the chance of survival decreases by 7-10% for every minute without defibrillation, so early AED use can double or triple survival rates.
- 5.Step 5: Conclude that CPR buys time by maintaining blood flow to vital organs, but only defibrillation can restore a normal rhythm, making early AED use critical.
Active Recall Memory Test
Test your memory before revealing the key facts
Frequently Asked Questions
Common questions students ask about this topic
Pass / Merit / Distinction Evidence Checklist
How your portfolio evidence is graded for NOCN Basic Life Support and Using an Automated External Defibrillator
Every vocational unit is marked against named criteria rather than an exam percentage. Your tutor's brief lists the exact codes for this unit — here is what each band is asking you to do.
Demonstrate baseline knowledge, accurate terminology, and core practical application.
Provide detailed analysis, structured explanations, and clear workplace reasoning.
Deliver thorough evaluation, original problem solving, and fully justified recommendations.
Before You Start
Prior knowledge that will help with this topic
- •Basic understanding of the human body, particularly the heart and lungs, is helpful but not essential.
- •Learners should be physically capable of performing CPR, as practical assessment is required.
- •It is beneficial to have completed a basic first aid course, though this is not mandatory.
Coursework AI Review
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Key Terminology
Essential terms to know
- Primary survey and casualty assessment
- Recovery position and airway management
- Cardiopulmonary resuscitation (CPR)
- Safe AED operation
- Chain of survival
- Post-resuscitation care
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