Obtain and test capillary blood samples
This element focuses on the safe and accurate procedure for obtaining capillary blood samples, a common task in care settings for monitoring conditions such as diabetes or anticoagulant therapy. It covers the relevant legislation, including infection control and consent, the anatomical sites suitable for puncture, and the step-by-step process from preparation through to recording and communicating results. Mastery ensures reliable measurements that inform care decisions.
Assessment criteria
Topic Overview
The City & Guilds Level 2 Diploma in Care is a foundational qualification for those starting a career in health and social care. It covers the essential knowledge and skills needed to work in a range of care settings, including residential homes, domiciliary care, and day services. The diploma is designed to ensure you understand the principles of care, safeguarding, communication, and person-centred support, which are critical for providing high-quality care to individuals with diverse needs.
This qualification is part of the City & Guilds Limited Occupational Qualification framework and is widely recognised by employers across the UK. It combines theoretical learning with practical application, often requiring you to demonstrate competence in a real work environment. By completing this diploma, you will be equipped to support individuals with their daily living activities, promote their independence, and uphold their rights and dignity. The course also emphasises the importance of working in partnership with other professionals and following legal and ethical guidelines.
Mastering this diploma is a stepping stone to further study, such as the Level 3 Diploma in Adult Care, and opens doors to roles like care assistant, support worker, or healthcare assistant. It is particularly relevant given the growing demand for skilled care workers in the UK. The content is structured around core units that cover topics like equality and inclusion, duty of care, and the role of the care worker, ensuring you have a solid foundation to build upon.
Key Concepts
Core ideas you must understand for this topic
- →Person-centred care: Tailoring support to the individual's preferences, needs, and values, ensuring they are at the centre of all decisions about their care.
- →Safeguarding: Protecting individuals from abuse, harm, and neglect, and knowing how to recognise and report concerns in line with local policies and the Care Act 2014.
- →Duty of care: A legal obligation to act in the best interest of individuals and to avoid causing harm, which underpins all care work.
- →Communication: Using verbal and non-verbal techniques effectively, including active listening, to build trust and understand the needs of individuals who may have communication difficulties.
- →Equality and inclusion: Ensuring everyone has equal access to care and is treated with respect, regardless of their background, in line with the Equality Act 2010.
Learning Objectives
What you need to know and understand
- Understand how legislation, policy and good practice guidelines relate to obtaining and testing capillary blood samples. Understand the anatomy and physiology in relation to obtaining and testing capillary blood samples. Be able to prepare to obtain capillary blood samples. Be able to obtain capillary blood samples. Be able to test and record the results of blood samples. Be able to pass on the results of blood samples.
Assessment Criteria
Key criteria assessors look for in your portfolio
- Award credit for identifying relevant legislation (e.g., Health and Safety at Work Act, COSHH) and applying it throughout the procedure, such as using PPE and safe sharps disposal.
- Credit accurate explanation of capillary blood sampling sites and the importance of avoiding areas with poor circulation, swelling, or previous puncture sites.
- Look for evidence of thorough preparation: verifying individual’s identity, consent, and any pre-test requirements; assembling correct equipment; and performing hand hygiene.
- Assess practical skill in sample collection: appropriate site warming, correct puncture depth, gentle squeezing to form blood drop, and avoiding milking or excessive pressure.
- Confirm ability to test sample using the device correctly, including calibrating if needed, applying blood adequately, and recording the result accurately in the care plan.
- Evaluate communication: passing results promptly to the relevant health professional, documenting in line with confidentiality, and reporting any abnormal values or issues.
Assessment Guidance
Guidance for achieving higher grades
- 💡Always follow your organisation’s standard operating procedure and refer to it during practical assessment; consistency is key.
- 💡Demonstrate infection control at every stage: hand hygiene before and after, correct use of gloves, and safe disposal of sharps immediately into an approved container.
- 💡Talk through your actions clearly, explaining why you are doing each step; this shows understanding of underlying principles and legislation.
- 💡If the device shows an error code, know how to troubleshoot—often it means repeating with a fresh strip and ensuring proper application.
- 💡When recording results, ensure the entry is legible, signed, dated, and includes any relevant observations (e.g., individual’s condition, time of test).
- 💡When answering questions about person-centred care, always give specific examples of how you would involve the individual in decisions, such as asking about their preferred routine or meal choices. This shows you understand the practical application.
- 💡For safeguarding questions, remember to mention the correct reporting procedures: who to report to (e.g., line manager, safeguarding lead) and the importance of documenting concerns accurately and promptly.
- 💡In written assessments, use the correct terminology from the Care Act 2014 and other legislation. For example, refer to 'wellbeing principle' and 'prevention' to demonstrate your knowledge of legal frameworks.
Common Mistakes
Common errors to avoid in your coursework
- Failing to check the individual’s identity and consent before starting, which breaches good practice and legal requirements.
- Choosing an inappropriate puncture site (e.g., centre of finger pad) or using a site that is cold or bruised, leading to inadequate sample.
- Applying excessive pressure or ‘milking’ the finger, which can dilute the sample with tissue fluid and produce inaccurate results.
- Neglecting to warm the site sufficiently, causing insufficient blood flow and requiring a second puncture.
- Incorrectly applying the blood to the test strip (too little, smeared, or not covering the sensor) leading to error readings or retesting.
- Failing to record the result immediately and accurately, or not reporting critical values to a registered nurse or doctor without delay.
- Misconception: Care work is just about following instructions. Correction: While following care plans is important, you must also use your own judgement and initiative to adapt to changing needs and promote independence.
- Misconception: Safeguarding only applies to children. Correction: Safeguarding applies to all vulnerable adults, including the elderly and those with disabilities. You must be vigilant for signs of abuse in all age groups.
- Misconception: Confidentiality means never sharing information. Correction: Confidentiality has limits. You must share information with relevant professionals if there is a risk of harm to the individual or others, in line with data protection laws.
Frequently Asked Questions
Common questions students ask about this topic
Pass / Merit / Distinction Evidence Checklist
How your portfolio evidence is graded for CITY & GUILDS LIMITED Obtain and test capillary blood samples
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
- •A basic understanding of health and social care values, such as respect and dignity, which are often covered in introductory courses or work experience.
- •Good communication skills, both written and verbal, as the diploma requires you to interact with individuals, families, and colleagues.
- •A willingness to reflect on your own practice, as the qualification involves self-assessment and continuous improvement.
Coursework AI Review
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Key Terminology
Essential terms to know
- Understand how legislation, policy and good practice guidelines relate to obtaining and testing capillary blood samples. Understand the anatomy and physiology in relation to obtaining and testing capillary blood samples. Be able to prepare to obtain capillary blood samples. Be able to obtain capillary blood samples. Be able to test and record the results of blood samples. Be able to pass on the results of blood samples.
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