Poynting effect

The Poynting effect refers to the phenomenon where mixing of liquid nitrous oxide at low pressure with oxygen at high pressure (in Entonox) leads to formation of gas of nitrous oxide. So oxygen and nitrous oxide both are present in gaseous state in Entonox cylinder. In anesthesia practice the Poynting effect is seen in the […]

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Anesthesia Physics

Anesthesia Physics are the very basics that involve the application of the laws of physics in anesthesia. Some knowledge of Physics is very important for anesthetists in their daily practice. The following are the important gas laws in Anesthesia Physics: BOYLE’S LAW At a constant temperature, volume of gas is inversely proportional to the pressure CHARLE’S LAW

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Charle’s law

The Charle’s law is another important gas law, essential in the understanding the physics related to gases. The Charle’s law states that the volume of a gas at constant pressure is directly proportional to the temperature of the gas. In other words with any increase in the volume of the gas the temperature will also increase

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Boyle’s law

Boyle’s law is an important gas law that states that at a constant temperature, the volume of gas is inversely proportional to the pressure of the gas. This means that when the temperature of a gas is kept constant, the relationship between Volume and pressure of a gas is inverse. Another way to put the Boyle’s

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Anatomical dead space and its Anesthetic implications

DEAD SPACE Total dead space (Physiological dead space) = Anatomical dead space + Alveolar dead space. Anatomical Dead Space It is constituted by air which is not participating in diffusion. Therefore it is constituted by air present in nose, trachea and bronchial tree (up to terminal bronchioles). Normally it is 30% of tidal volume or 2 ml/kg or 150 ml.

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Anatomy of larynx

The anatomy of larynx is extremely important for an anesthesiologist. A through knowledge of the anatomy of larynx is essential for mastering the skill of intubation with a tracheal tube. Larynx is the organ of voice extending from the root of the tongue to trachea and lies opposite C3 to C6 vertebrae. The distance between

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