Health for All says
In clinical practice, we often encounter patients with bruises on their arms after their blood is drawn. Some patients will be very puzzled, why is there such an uncomfortable *** when it is just a blood draw?In fact, the answer to this question is relatively simple and related to the physiological characteristics of the human body.
First of all, the bruising of the arm after the blood draw is mainly due to the following two reasons: one is the damage to the blood vessels during the blood draw, and the other is the role of the blood clotting mechanism.
To draw blood, health care providers use needles to puncture blood vessels, a process that is less invasive and does not cause serious damage to blood vessels. However, for some people with weak blood vessels or fragile blood vessel walls, blood draws may cause small breaks in the blood vessel walls, which can cause local hematomas to form and eventually bruise the arms.
Also, during blood drawing, a small purplish-black hematoma sometimes forms around the needle. This is due to the bleeding of the tissues after the injection, the blood exudes to the local tissues, and part of the hemoglobin is broken down in the tissues, producing red hemoglobin, and the deposition of red hemoglobin makes the stinging site appear purple-black hematoma.
In this case, there are a few things we can do to reduce or prevent bruising from occurring. First of all, choose an experienced** or doctor for blood drawing, who has extensive experience in the operation and is able to reduce the damage to the blood vessels. Secondly, it is necessary to try to avoid excessive movement of the needle when drawing blood to reduce damage to the blood vessel wall. In addition, cold or hot compresses can be used appropriately after blood draw, which can help reduce or eliminate local hematomas.
In terms of traditional Chinese medicine, we can also draw on some ancient prescriptions to help alleviate this situation. For example, you can choose to use MEmu. Xiaoyaosan is a traditional Chinese medicine prescription commonly used to reduce blood congestion and dissipate blood stasis. Xiaoyaosan is composed of a variety of medicinal materials such as salvia, Chuanxiong, and red peony, and its effects include blood circulation and blood stasis, dissipation of blood congestion, etc. Taking Xiaoyaosan in moderation can promote blood circulation and reduce the duration and severity of bruising.
In summary, the cause of bruising on the patient's arm after blood drawing is mainly due to vascular damage and the role of blood clotting mechanism. In daily practice, we should choose experienced medical personnel to draw blood, pay attention to the operation skills when drawing blood, and at the same time, we can also use the knowledge of traditional Chinese medicine to adopt some appropriate methods to alleviate or prevent the occurrence of bruising.
Health References:
1.Zou Shiqian, Zeng Yanjie, Wu Shengxin. Study on several formulas to reduce blood stasis and systemic toxicity after subcutaneous injection[J].Fine Chemicals,2009,26(5):777-780