, medical expert
Last reviewed: 19.11.2021

All iLive content is medically reviewed or fact checked to ensure as much factual accuracy as possible.

We have strict sourcing guidelines and only link to reputable media sites, academic research institutions and, whenever possible, medically peer reviewed studies. Note that the numbers in parentheses ([1], [2], etc.) are clickable links to these studies.

If you feel that any of our content is inaccurate, out-of-date, or otherwise questionable, please select it and press Ctrl + Enter.

Hemoglobin - the main component of erythrocytes, is a complex protein, consisting of heme and globin. The main function of hemoglobin is to transfer oxygen from the lungs to tissues, as well as to remove carbon dioxide from the body and regulate CBS. In the blood, hemoglobin is predominantly in the form of oxyhemoglobin (this is a compound of hemoglobin with oxygen) and the form of reduced hemoglobin (this is oxyhemoglobin, which gave oxygen to tissues). Oxyhemoglobin is mainly contained in the arterial blood and gives it a bright scarlet color. In venous blood, there is one or another form of hemoglobin, so the venous blood has a dark cherry color.

Determination of the hemoglobin concentration in the blood plays a crucial role in the diagnosis of anemia. The conclusion about the presence of anemia is based on the results of determining the concentration of hemoglobin and the hematocrit in the blood: for men, a decrease in the hemoglobin concentration below 140 g / l and a hematocrit less than 42%; for women - less than 120 g / l and 37% respectively. In anemia, the hemoglobin concentration varies widely and depends on its shape and severity. In iron deficiency anemia in most patients, a decrease in hemoglobin is relatively moderate (up to 85-114 g / l), less pronounced (up to 60-84 g / l). A significant decrease in hemoglobin concentration in the blood (up to 50-85 g / l) is characteristic for acute blood loss, hypoplastic anemia, hemolytic anemia after hemolytic crisis, vitamin B 12- deficient anemia. Concentration of hemoglobin 30-40 g / l - an indicator of severe anemia, which requires urgent measures. The minimum concentration of hemoglobin in the blood, compatible with life, is 10 g / l.

trusted-source[1], [2], [3], [4], [5], [6], [7], [8], [9], [10]

What's bothering you?

What do need to examine?

More information of the treatment

Translation Disclaimer: For the convenience of users of the iLive portal this article has been translated into the current language, but has not yet been verified by a native speaker who has the necessary qualifications for this. In this regard, we warn you that the translation of this article may be incorrect, may contain lexical, syntactic and grammatical errors.

You are reporting a typo in the following text:
Simply click the "Send typo report" button to complete the report. You can also include a comment.