Blood Sample Collection Methods: Know the Basics

2 min


Blood sample collection

Blood sample collection is the basic method to diagnose and monitor diseases through haematological, biochemical, microbiological and serological tests.

Blood samples reveals patient’s overall health condition and also certain diseases. A normal health check up always comprises of blood sample collection. This is an extremely important tool for identification of diseases and infections because of microorganisms.

Types of Blood Sample Collection

A physician collects a blood samples in a hospital or laboratory. Nowadays most of the laboratories are collecting blood samples from patients in their homes.

Collecting blood samples from the arm, hand, finger, or ear (for an infant) depending on the analysis. For children under six months blood samples from the heel also taken for analysis.

Before collecting blood sample a tourniquet must be placed tight on the upper arm. It causes the blood to build up and fill veins, so that the blood sample can be easily be taken.

Blood collection has 3 major types based on the route of blood collection, They are.,

  • Arterial sampling – Taken from the Arteries
  • Veinpuncture sampling – Taken from the Veins
  • Fingerstick sampling – Taken from the Capillaries

Arterial Sample

This form of blood collection will takes place in a hospital environment. It is useful in the identification of metabolic, respiratory, and mixed acid-base disorders, where co2 levels are required. However, this method will be a little painful for patients.

There are also some effects such as an abnormal modified Allen test or local infection. There is also an risk of bleeding for patients with coagulopathy.

Veinpuncture Sample

Veinpuncture is the most commonly used way to collect blood from adult patients. The blood in the superficial vein in the upper limb, usually the median cubital vein. This vein is in close contact with the skin. Therefore, doesn’t have any large nerves near it. This reduces pain for the patients.

Veinpuncture mostly carried out by general medical practitioner’s and is often carried out by a trained phlebotomist or nurse. There are also some risk in this method of blood collection. For example, storage, transportations, and potential loss or contamination of the blood samples.

Fingerstick Sampling

fingerstick sampling involves taking a very small amount of blood from patients finger end. It is very quick and requires very less time.

The benefits of this method loss of very less blood. Nowadays most of the people do this method by themself in home for blood sugar test . Above all, this reduces anxiety and pain for the patients.

In conclusion, you will be known about the methods of blood collections are carrying out by hospitals and laboratories.


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S.P.R.Vishali

Pursuing B.Sc in biotechnology, interested to write about health. Working with IDP IELTS as invigilator. Reading books and cooking are my hobbies.