Can blood still be drawn if the vacuum tube has lost its negative pressure?
Apr 12, 2023
Source: Cainiu Health
Dr. Li Feng
Introduction
Vacuum tubes that have lost their negative pressure cannot be used for blood collection. These tubes rely on negative pressure to draw blood through the needle inserted into a blood vessel. If the vacuum tube has lost its negative pressure, it will not be able to draw blood effectively, making blood collection impossible. Additionally, blood collection devices are generally intended for single use only and should not be reused. In such cases, once the negative pressure is gone, the needle should be removed.
When a vacuum tube loses its negative pressure, it cannot be used to continue blood collection.
Vacuum tubes work on the principle of negative pressure: once the needle is inserted into the blood vessel, the negative pressure draws the blood into the tube. However, if the vacuum tube has lost its negative pressure, it will not be able to draw blood effectively, making blood collection impossible. Generally, blood collection devices are single-use only. In such cases where there is no remaining negative pressure, the needle should be removed, and proper local wound care should be performed. If insufficient blood was collected, a new vacuum tube and needle can be used to repeat the procedure.
Blood collection is one of the most common clinical diagnostic methods. Blood tests can help initially identify various conditions, such as inflammatory diseases, infections, and coagulation disorders. For patients with suspected illnesses, results from blood tests guide further diagnostic evaluation, leading to a definitive diagnosis and appropriate treatment, thus avoiding delays and missed optimal treatment windows. In daily life, it's important to avoid unhealthy habits to protect overall health.
