How many milliliters of blood are drawn for seven tubes?
Jul 25, 2023
Source: Cainiu Health
Dr. Yang Shuwen
Introduction
Under normal circumstances, drawing seven tubes of blood amounts to 14–35 milliliters. Common types of blood collection tubes include standard serum tubes, vacuum tubes, or other special tubes (such as anticoagulant tubes, blood culture bottles, etc.). Generally, each blood collection tube holds approximately 2–5 milliliters, so seven tubes typically yield 14–35 milliliters of blood. During blood collection, healthcare professionals draw blood sequentially into the collection tubes.
Generally, drawing seven tubes of blood amounts to 14–35 milliliters. Specific details are as follows:
Commonly used blood collection tubes include standard tubes and other special tubes (such as anticoagulant tubes, blood culture tubes, etc.). Typically, each blood collection tube holds about 2–5 milliliters, so collecting seven tubes usually results in a total volume of 14–35 milliliters. During blood collection, medical personnel will sequentially draw blood into the tubes until the required amount is reached, using professional needles and techniques to ensure sufficient sample collection while minimizing patient discomfort and pain.
It is important to monitor your physical condition during the blood draw. If you experience any discomfort, communicate with healthcare providers immediately. Patients who feel unwell should seek medical attention promptly and undergo examinations and treatment under a doctor's guidance, which helps support recovery.
