Factors affecting venous return: (1) The driving force of venous return is the pressure difference at both ends of the vein, that is, the difference between peripheral venous pressure and central venous pressure. The formation of pressure difference mainly depends on the contractile force of the heart, but it is also affected by respiratory movement, body position, muscle contraction, etc. (2) The squeezing effect of skeletal muscle acts as a muscle pump to promote venous return.
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Nose allergy is a kind of allergic rhinitis, related to congenital genetic factors, nose contact with external allergens caused by some uncomfortable symptoms, such as sneezing, runny nose, stuffy nose, itchy nose and other symptoms, nose allergy to the patient\'s body has brought a lot of discomfort. So what about nose allergies? Treatment 1. Avoid...
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In our life, it is often easy to distinguish between a cold and nasal allergy, nasal allergy is often very similar to a cold, so it will cause many patients with rhinitis but do not know only that it is a cold, so often delayed the best treatment period, then how should we distinguish between a cold and nasal allergy? Let\'s take a look at...
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What causes deep vein thrombosis? What are the factors that cause DVT? The factors that precipitate deep vein thrombosis include venous stasis, vascular injury and hypercoagulability. Clinically, many factors involving the above three aspects uniformly and objectively lead to venous thrombosis, and the common ones are as follows: ① Surgery: especially...
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