What Blood Vessels Are Not Used For Hematological Procedures?

What Blood Vessels Are Not Used For Hematological Procedures

Hematological procedures play an important role in medical diagnostics and treatments. It involves the study and treatment of blood-related conditions.

These procedures require access to blood vessels for different purposes like blood draws, transfusions, and bone marrow biopsies. However, not all blood vessels are suitable for hematological procedures.

In this article, we will explore which blood vessels are not used for hematological procedures and why, and also discuss some of the potential risks and complications that can arise from using inappropriate vessels.

Hematology is basically the branch of medicine that focuses on the study of blood, blood-related disorders and the organs involved in forming blood.

Hematological procedures involve various diagnostic tests and therapeutic interventions to assess and treat conditions like anemia, lymphoma, sickle-cell anemia, leukemia, myeloma and clotting disorders.

These procedures play a crucial role in diagnosing diseases, monitoring treatment effectiveness, and providing supportive care.

Hematological disorders are typically diagnosed and treated by specialists known as hematologists. They’re the experts in this field.

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Common hematological procedures

Common hematological procedures are regularly done in medical facilities. These include:

  • Blood Draws. We collect blood samples to perform different diagnostic tests like complete blood counts (CBC), blood chemistry panels, and genetic testing.
  • Transfusions. Blood transfusions involve the intravenous administration of blood or blood components to replace lost blood, improve oxygenation, or regulate clotting factors.
  • Bone Marrow Biopsies. This procedure includes taking a small sample of bone marrow to check its cellular composition and detect any irregularities in blood cell production.
  • Chemotherapy. A type of treatment that uses medicines to destroy cancer cells. It can be administered orally or intravenously, depending on the condition.
  • Radiation Therapy. This technique uses high-energy radiation to target and kill cancer cells while minimizing harm to healthy tissues.

What blood vessels are not used for hematological procedures?

Blood vessels play a vital role in accessing the circulatory system, but not all of them are suitable for hematological procedures. Here are a few vessels that are usually not used:

1. Arteries & Veins

  • Pulmonary artery. It transports deoxygenated blood from the right side of the heart to the lungs to get oxygen. This vessel is not used for hematological procedures because it doesn’t carry oxygen-rich blood.
  • Ulnar vein & radial artery in arms. These blood vessels are commonly used for arterial blood gas sampling and monitoring, not hematological procedures.
  • Carotid artery & jugular vein in the neck. Similar to the radial artery and ulnar vein, these vessels are used for specific procedures like central venous catheter placement or arterial line insertion. They’re not suitable for hematological procedures.
  • Lymphatic vessels. These vessels carry lymphatic fluid and don’t contain a significant amount of blood, making them unsuitable for hematology-related procedures.

2. Capillaries

Capillaries are the smallest blood vessels in our body that connect arteries and veins together. While they play a crucial role in gas exchange, they’re not used for hematological procedures because of their very small size and fragile nature.

Why are these vessels not used in hematological procedures?

hematological procedures

Here are some reasons why these blood vessels aren’t typically used for hematological procedures:

  • Risk of infection. Some vessels, like the carotid artery and jugular vein in the neck, are at a higher infection risk because they’re closer to the respiratory tract and mouth.
  • Difficulty accessing. Vessels like capillaries are too small to access directly and may require more invasive procedures like bone marrow biopsies or venipuncture.
  • Incorrect sample collection. Inaccurate results can occur if the wrong vessel is used for a specific test or procedure. For example, using a vein instead of an artery for arterial blood gas sampling can lead to incorrect results.
  • Potential risks. Some vessels, like the pulmonary artery, have a higher risk of complications due to their location and function. Using them for hematological procedures can increase the risk of bleeding or damage to surrounding organs.
  • Fragile nature. Capillaries are very thin and easily damaged which makes them not the best option for drawing blood or giving medications. Attempting to access them can cause significant discomfort and increase the risk of bruising or bleeding.


Choosing the right blood vessel is very important for the success and safety of hematological procedures. Arteries, capillaries, and superficial veins are generally not used due to their associated risks, limitations, and potential complications.

Understanding which blood vessels are suitable for hematological procedures is essential for healthcare professionals. It helps ensure accurate diagnoses, effective treatments, and better patient outcomes.


The information provided in this article is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Don’t ignore professional medical advice or put off seeking it just because of something you read here. Although we aim to offer precise and current information, we do not guarantee its completeness, accuracy, reliability, suitability, or availability for any purpose. Using the information in this document is at your own risk. We are not responsible for any losses or damages caused by our content.

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