Unit 4223-339 Obtain and test capillary blood samples (HSC 2026)
Credit value: 4
This unit is aimed at health & social care workers involved in the collection of capillary blood samples using either manual or automated lancets and testing of the sample where this is required.
There are six learning outcomes to this unit. The learner will:
1. Understand how legislation, policy and good practice guidelines relate to obtaining and testing blood sample
2. Understand the anatomy and physiology in relation to obtaining and testing capillary blood samples
3. Be able to prepare to obtain capillary blood samples
4. ...view middle of the document...
We should always check equipment which we are going to use if it is safe and working properly, we should wear PPE every time we are undertaking any task, ensure that we are trained to do the task, we should keep the working place safe and clean. When we are about to take measurement from an person we need to make sure that the person know exactly what we are going to do and asking permission for the task we are about to do. Recording the task in the chart and keep it confidential to protect personal information during the course of our work.
When obtaining and testing capillary blood samples the following must be taken into account:
Privacy and dignity, Infection Prevention and Control Policy (CH001)
Standard Universal Precautions (CH004)
Use of Sharps (CH005)
Management of Exposure to Blood Bourne Viruses Guidelines (CH017)
Management of the HIV/AIDS Infected Care Worker Guidelines (CH0028)
Use of PPE Guidelines (CH029)
Hand Hygiene Policy (CH/PC110)
Guidelines for Management of Sharps Injury (CH/PC 115)
Consent Policy (GP011)
Mental Capacity Act (2007)
Health and Safety Policy (CHSHS 001)
Cleaning and Decontamination Guidelines (CH/PC 101)
NHS LCR Anticoagulation Operational Policy (2010
Outcome 2 Understand the anatomy and physiology in relation to obtaining and testing capillary blood samples
The learner can:
1. Describe the structure and purpose of capillary blood vessels
A capillary is an extremely small blood vessel, which is located in the tissues of the body. Their purpose is to transport blood to the veins and arteries. The walls of the capillaries form the semipermeable layer through which fluids are exchanged between the blood and tissue fluids surrounding body cells. The walls of the capillaries are so thin that they are only made up of one or two cells. This means that they are so narrow that blood cells can only travel through them in single file.
2. Explain blood clotting processes and the factors that influence blood clotting.
Blood clotting is known as Coagulation. It is a series of physical reactions that transform liquid blood into a gel that forms a secure patch over the damaged blood vessel.
Coagulation has three main stages: Formation of factor x and prothrombinase, Prothrombin is converted to thrombin and finally Fibrinogen is converted to fibrin.
The clot is formed by these stages. A process called Clot Retraction then strengthens it. This is here platelet in the clot contract pulling on the fibrin strands that they are attached to.
Outcome 3 Be able to prepare to obtain capillary blood samples
The learner can:
1. Confirm the individual’s identity and obtain valid consent
Before taking blood introduce yourself to the patients. Explained the rationale for the procedure, the benefits, the potential risks and gains informed consent, discuss any medical history, medications, contradictions.
Checked Full name, date of birth, hospital /NHS number, against hospital document...