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Survival First Aid How to treat injuries and save lives von McNab, Chris (eBook)

  • Verlag: Amber Books Ltd
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Survival First Aid

Survival First Aid covers everything you ned to know about administering urgent medical attention in situations where there is no prospect of immediate professional medical help. To show you how to deal with such emergencies and potentially save someone's life, this comprehensive and indispensible guide provides step-by-step instructions for treating a range of common and less common injuries and conditions, from cleaning a wound to setting a fractured neck. Key areas include breathing and circulation; healing wounds and stopping bleeding; dealing with head injuries and altitude sickness; treating burns and scalds; mending broken bones, damaged joints and torn muscles; and avoiding poisons and removing foreign objects from wounds. You will also learn how to respond to the problems caused by extremes of climate and temperature as well as how to cope with a range of illnesses, including appendicitis, diaorrhea and malaria. With tips on injury avoidance and effecting a successful rescue, Survival First Aid ensures that you will be prepared for almost any medical emergency. -Learn key techniques such as diagnostic procedures, resuscitation and treating shock. -How to treat cuts and burns and deal with fractures and head injuries. -How to recognize and avoid poisoning and remove foreign objects from wounds. -How to cope with problems caused by temperature and climate, from hypothermia to heat stroke. -Illustrated throughout with more than 150 specially drawn artworks. -Features self-contained boxes on subjects as diverse as vaccinations, the effects of blood loss, fire safety and rescue codes.

Produktinformationen

    Format: ePUB
    Kopierschutz: AdobeDRM
    Seitenzahl: 320
    Sprache: Englisch
    ISBN: 9781909160347
    Verlag: Amber Books Ltd
    Größe: 26518 kBytes
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Survival First Aid

CHAPTER TWO

The human body & first aid

The human physique is both incredibly strong and intensely vulnerable. Life is sustained around the efficient functioning of three major body systems - circulatory, respiratory and nervous - and knowing how they work forms the basis of much of your emergency first aid treatment.

F irst aid is primarily about immediate and practical treatments, so advanced medical knowledge is not a pre-requisite. However, it is advantageous if the first aider comprehends the biological cornerstones of human life, for without an understanding of the body's basic mechanisms, it is difficult to adapt treatments to meet unexpected developments in the illness or injury. Furthermore, without understanding or appreciating the reason for your actions, it can be more difficult to best apply yourself.

We begin this chapter with a look at the three biological systems responsible for maintaining human life - the respiratory, circulatory, and nervous systems. From there, we move onto the fundamentals of first aid practice - diagnosis, assessment, and treatments when one or more of the major body systems is in acute failure.
THE BODY'S SYSTEMS

For a first aider, the essential principle to remember is that the oxygenation of the human body must be maintained at all times. All human tissue, but especially the major organs of the body, will quickly die if deprived of oxygen. It is the respiratory system's job to draw air from the outside world, extract the oxygen and pass it into the blood. It is the job of the circulatory system to pump this blood around the body, and deliver oxygen to the body tissue while extracting waste products. Finally, the nervous system regulates the pace and efficiency of the whole process.

When a first aider is faced with a casualty, their attention is (initially) totally given over to supporting the efficient function of all three systems if need be. For if any system fails, the result is hypoxia, or low levels of blood-borne oxygen. For example, a patient has an obstructed windpipe, then the respiratory system cannot draw air into the lungs, and the blood receives no new oxygen. This in turn means that the circulatory system does not contain enough oxygen in the blood to perform full-body oxygenation properly (a condition known as ischemia).

Hypoxia, if not corrected, leads to infarction, the death of body tissue and organs. The brain is one of the most vulnerable organs to ischemic problems. Brain cells begin to die after only three minutes of deprivation, and if completely deprived of oxygen for more than five minutes, brain damage or brain death will almost certainly ensue. Consequently, in life-threatening emergencies the combating of ischemia is the first aider's absolute priority. That involves the effective support of all three body systems, and we shall now look at each in more detail.

The respiratory system
Respiratory System

The respiratory system consists of the mouth, nose, trachea, and lungs, and includes the network of pulmonary arteries that take oxygen from the lungs to the bloodstream. Breathing is controlled by the autonomic nervous system - the part of our brain and nerve network that regulates essential involuntary processes such as the heartbeat and body temperature. All breathing begins with inspiration (breathing in). This occurs when a network of muscles including the intercostal (between the ribs) muscles, the diaphragm, and muscle groups in the abdomen and neck work together to expand the chest cavity, creating a vacuum in the lungs which causes air to rush in via the nose or mouth.

The air passes down the nose and trachea, a cartilage tube of between 10 and 12cm (4-4.75in) in an adult, which then subdivides into the bronchi (the first inverted Y-shape division is known as the stem bronchi). These subdivide cont

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