Physics

This article describes the electrical and magnetic activity within the body, which can be detected and measured using electrodes or transducers. Invasive blood pressure monitoring is used as an example of monitoring of a biological signal.Biological Signals and their Measurement – December 1, 2008

This article outlines the areas of knowledge concerning electricity and magnetism that are essential for the practice of safe anaesthesia. The areas covered include basic concepts, amplification of biological potentials, sources of electrical interference, electrical hazards and their causes and prevention, diathermy and defibrillators.Electricity and Magnetism – December 1, 2008

This article covers the definition of flow, the different types of flow are there and the physical principles govern them. The Hagan-Pouseille equation and its relevance to clinical anaesthetic practice are explained.Flow – December 1, 2008

Although a range of different inhaled anaesthetic agents are available in different settings around the world, the principles involved remain unchanged and a good understanding of the properties of commonly used gases and vapours is essential for the safe conduct of anaesthesia.Gases and Vapours – December 1, 2008

Humidity is an important aspect of delivering gases to patients in theatres and intensive care. Every anaesthetist is expected to understand the principles of humidification of gases. The consequences of not humidifying gases can be serious. This article will cover the basics of humidity and techniques of humidification of gases.Humidification – December 1, 2008

This article describes the basic science of pressure, its relevance to anaesthesia and critical care, and its measurement. Adequate blood pressure is essential to maintain the blood supply and function of vital organs. Measurement of blood pressure is therefore a key part of the monitoring of patients during anaesthesia and critical care.Pressure and Blood Pressure Measurement – December 1, 2008