In this article we will discuss about the meaning and role of peripheral resistance in cardiovascular system. Meaning of Peripheral Resistance: i. It is the resistance offered by vessel wall for flow of blood. ii. The unit used to measure resistance (pressure divided by flow) is dynes/cm. In other words, resistance in cardiovascular system is generally expressed as R units [...]
There are many theories which try to explain the mechanism of auto-regulation of blood flow. They are: 1. Myogenic theory 2. Tissue metabolite theory 3. Tissue fluid pressure theory 4. Renin-angiotensin theory, etc. (this theory is applicable only in kidneys) 1. Myogenic Theory (Fig. 3.53) According to This Theory: i. When there is an increase in pressure, initially there will [...]
In this article we will discuss about:- 1. Types of Shock 2. Signs and Symptoms of Shock 3. Stages 4. Events Occurs in Irreversible Stages 5. Treatment. Shock is defined as lack of tissue perfusion which occurs when there is an imbalance between the volume of blood present in the circulatory system and the capacity of the circulatory system itself. [...]