Hematocrit (Medical Definition) | Quick Explainer Video

What is Hematocrit? This video covers the medical definition and provides a brief overview of this topic.
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➡️ Hematocrit
Hematocrit tests are commonly ordered as part of a complete blood count (CBC), a standard blood test often used in medical evaluations. The hematocrit value is primarily determined by two factors: the number of red blood cells and the volume of plasma, the liquid component of blood. A normal hematocrit range varies among individuals and depends on factors such as age, sex, and overall health. In adult men, the typical range is approximately 41% to 50%, while in adult women, it is roughly 36% to 44%. These ranges may differ slightly depending on the laboratory and methods used.

Hematocrit levels outside the normal range may indicate a variety of medical conditions. A high hematocrit value may be indicative of conditions like dehydration, polycythemia, or lung and heart diseases that result in low oxygen levels. On the other hand, low hematocrit levels may suggest anemia, malnutrition, leukemia, or other blood disorders. Variations in hematocrit levels can also be influenced by lifestyle choices, such as smoking, and environmental factors, such as high altitudes.

The test itself is straightforward and minimally invasive. Blood is generally drawn from a vein, usually from the inside of the elbow or the back of the hand. The blood is then placed in a test tube and centrifuged, separating the components by density. After centrifugation, the red blood cells settle at the bottom, and their volume is compared to the total volume of the blood sample. The ratio gives the hematocrit level. Hematocrit values are critical in making clinical decisions, especially in scenarios like trauma with substantial blood loss, monitoring of chronic conditions like kidney disease or anemia, and preoperative evaluations.

Additionally, athletes and mountaineers often monitor their hematocrit levels as it can significantly influence physical performance. Hematocrit levels that are too low can result in insufficient oxygen supply to tissues, while a hematocrit level that is too high can lead to increased blood viscosity, possibly resulting in thrombosis or tissue ischemia. Hematocrit is a significant diagnostic metric that provides valuable insights into a person's overall health and ability to carry oxygen through the bloodstream. It is commonly used in a wide range of medical contexts, from routine check-ups to emergency room assessments. Understanding hematocrit levels can offer key diagnostic clues and guide healthcare providers in making informed decisions regarding the treatment and management of various medical conditions.

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🚑MEDICAL DISCLAIMER
This content is for educational and informational purposes only. It is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Please consult with a physician with any questions that you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you watch in this video. We strive for 100% accuracy, but errors may occur, and medications, protocols, and treatment methods may change over time.

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⏰TIMESTAMPS
0:00 - Intro
0:30 - Hematocrit Tests
0:48 - Normal Hematocrit range
1:13 - Hematocrit Levels
1:38 - Variations
2:16 - Hematocrit Values

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