What is the yellow substance applied before blood draw?

Apr 06, 2023 Source: Cainiu Health

Dr. Yang Shuwen

Introduction

The yellow substance applied before blood draw is usually iodophor or tincture of iodine, primarily used for disinfection. Blood tests can effectively assess cholesterol levels in the blood lipids, and are useful in diagnosing impaired glucose tolerance and diabetes. There are many testing items and purposes involved. After blood collection, proper local care is essential; avoid contact with water in the short term to prevent infection.

The yellow substance applied before blood draw usually refers to iodophor or iodine tincture, primarily used for disinfection.

Prior to blood collection, the puncture site must be disinfected to prevent infection after needle insertion. Typically, iodophor or alcohol is used to disinfect the local area before drawing blood. After blood collection, pressure is applied with a cotton swab. Medical supplies used are generally sterile, so infections rarely occur under normal circumstances.

Blood tests can effectively determine whether diseases are present and help assess disease conditions. Routine blood tests include measurements of blood glucose, blood lipids, and liver and kidney function. These routine tests can effectively detect whether there is a blood infection, identify cholesterol levels in the blood lipids, and aid in diagnosing impaired glucose tolerance and diabetes. There are numerous testing items and specific diagnostic purposes involved.

In addition, after completing blood collection, proper care of the puncture site is essential. Avoid contact with water in the short term to prevent potential infection.

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