This article throws light upon the three main ways for expressing percentage concentration in a drug. The ways are: 1. Weight in Weight (W/W) 2. Weight in Volume (W/V) 3. Volume in Volume (V/V). Way # 1. Weight in Weight (W/W): This expression is used when solids are mixed with solids e.g. in powders, paste, ointments etc. A 5% w/w [...]
This article throws light upon the seven main theories of general anaesthesia. The theories are: 1. Lipid Theory 2. Surface Tension Theory (Adsorption Theory) 3. Cell Permeability Theory 4. Neuro Physiological Theory 5. Colloidal Theory 6. Physical Theory 7. Biochemical Theories. 1. Lipid Theory: This theory was advanced by Meyer (1899,1901) and Overton (1901). This theory propose that there is [...]
After reading this article you will learn about:- 1. Purpose of Anaesthesia 2. History of Anaesthesia 3. Characteristics of an ideal Anaesthetic 4. Clinical Stages of Anaesthesia 5. Preparation of Patient for Anaesthesia 6. General Consideration in Selection of Anaesthetics. Purpose of Anaesthesia: Anaesthesia is a reversible process by which loss of sensation in a body part or in the [...]