Name of the Procedure:

Blood count; platelet, automated (also known as platelet count, automated platelet count)

Summary

A platelet count is a blood test that measures the number of platelets in your blood. Platelets are tiny cells that help your blood to clot properly, which is essential for stopping bleeding. This test is typically performed using automated machines that rapidly and accurately count the number of platelets in a blood sample.

Purpose

The platelet count test is used to:

• Diagnose and monitor bleeding disorders and diseases that affect platelet production.
• Evaluate clotting disorders, such as thrombocytopenia (low platelet count) and thrombocytosis (high platelet count).
• Monitor the effectiveness of treatments that affect platelet count, such as chemotherapy.

Indications

The procedure is indicated for patients experiencing:

• Unexplained or prolonged bleeding
• Bruising easily
• Petechiae (small red or purple spots on the body)
• Persistent infections or inflammation
• Undergoing treatment for conditions that impact platelet count, like chemotherapy or bone marrow disorders.

Preparation

• No special preparation is typically needed for a platelet count test.
• Patients may be asked to avoid certain medications that can affect platelet levels, such as aspirin or nonsteroidal anti-inflammatory drugs (NSAIDs).

Procedure Description

1. A healthcare provider takes a blood sample, usually from a vein in the arm using a needle.
2. The blood sample is collected into a tube containing an anticoagulant to prevent clotting.
3. The sample is sent to a lab where an automated machine analyzes the blood to count the number of platelets.
4. The automated machine uses electrical impedance or optical methods to count and size the platelets.

Duration

The blood draw itself takes only a few minutes. Lab analysis also typically takes a few minutes, but results may be available on the same day or within a few days.

Setting

The blood sample can be taken in various settings, including:

• Hospital
• Outpatient clinic
• Doctor’s office
• Diagnostic laboratory

Personnel

The procedure is usually conducted by:

• Phlebotomists or nurses who draw the blood sample
• Laboratory technicians or technologists who run and analyze the tests

Risks and Complications

Common risks:

• Slight pain or bruising at the needle insertion site
• Minor bleeding or discomfort

Rare risks:

• Infection at the puncture site
• Fainting or feeling lightheaded

Benefits

• Provides critical information about your body's ability to clot blood.
• Helps diagnose bleeding, clotting, and bone marrow disorders.
• Guides the management and treatment of conditions affecting platelet levels.

Recovery

• No significant recovery time is needed.
• Patients can resume normal activities immediately after the blood draw.
• Keep the puncture site clean and watch for signs of infection or excessive bleeding.

Alternatives

• Manual platelet count: Less commonly used, usually only when automated counts are inconclusive.
• Bone marrow biopsy: Used if a deeper investigation of blood disorders is needed.
• Other blood tests: To complement or further investigate abnormal platelet counts, such as a complete blood count (CBC).

Patient Experience

• The procedure is usually quick and relatively painless, involving only a needle prick.
• Some patients might feel slight discomfort or a pinch during the blood draw itself.
• If feeling anxious, inform the healthcare provider, who can offer reassurance or comfort measures.