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Minor traumatic bleeding from the head
Emergency bleeding control describes the steps or actions taken to control bleeding from a patient who has suffered a traumatic injury or who has a medical condition which has led to bleeding. Many bleeding control techniques are taught as part of first aid throughout the world, although some more advanced techniques such as tourniquets, are often taught as being reserved for use by health professionals, or as an absolute last resort, in order to mitigate the risks associated with them, such as potential loss of limbs. In order to manage bleeding effectively, it is important to be able to readily identify both types of wounds and types of bleeding.
Contents
1 Types of wounds
2 Blood vessels affected
3 External wound management
3.1 Elevation
3.2 Direct pressure
3.3 Pressure points
3.3.1 Epistaxis
3.4 Tourniquet
3.5 Clotting agents
4 Internal wound management
5 See also
6 References
//
Types of wounds
Main article: Wound
Wounds are normally described in a variety of ways. These may deal with a description of wound size (length) and thickness, or also with the plainly visible wound characteristics. Wounds may be categorized as open or closed, or as either acute or chronic in origin. The most common descriptors of wounds are these:
Incisions: Straight edges to the wound margins, as if sliced with a knife. These can vary in size, and may be caused by a variety of objects, including a scalpel, a knife, any piece of straight, sharp metal, or a piece of glass. Tissue is rarely missing from the wound site, and the margins of the wound may be easily matched from one side of the wound to the other for the purposes of closure.
Laceration: Jagged edges to the wound margins, more closely resembling a tear than a slice. The wounded tissue is random rather than straight in direction, and may have multiple branches. Most often caused by an object with a broken or serrated edge, such as a piece of broken glass or metal, but may also be caused by a blow from a blunt object to tissue with bone immediately behind it.
Puncture: Sharp object penetrates the tissue, and travels internally, but does not move laterally in any direction from the point of entry. Such wounds can be misleading, as they may appear quite small on surface examination, but extend quite deeply into the body; even damaging nerves, blood vessels, or internal organs. They may cause substantial internal bleeding or secondary injuries, such as a collapsed lung, which may not be readily evident during primary assessment. Occasionally, the object causing the injury will remain in the wound as an impaled object. A stab wound from a knife or other sharp object, or a bullet wound would be examples of this type of injury. Medical professionals usually refer to this type of wound as penetrating trauma.
Abrasion: A scraping or scratching. Generally quite superficial, and affecting only the surface layers of the epidermis. No internal organs, nerves, or blood vessels other than capillaries, are affected. This may be the result of a fall, or of sliding (friction) against rough surfaces. The road rash often suffered by falling motorcyclists is an example of this type of wound.
Contusion: Simple bruising. In this type of injury, the capillaries in the epidermis and dermis are damaged, without breaking the skin. Blood oozes out of these vessels into the spaces between cells or interstitial space, causing swelling and discoloration. Blood loss is generally limited, and not of serious consequence. It may, however, act as a signpost, pointing to more serious injuries.
Avulsion: A full thickness laceration-type wound, often semi-circular in shape. This creates a flap which, when lifted, exposes the deeper tissues to view, or extrudes them from the wound itself. Avulsions often occur in mechanical accidents involving fingers (sometimes referred to as degloving), and on a more serious note, may affect the orbit of the eye or the abdominal cavity, exposing the internal viscera. Avulsions are difficult to repair, and no avulsion should ever be considered a minor injury.
Types of wounds
Laceration
Abrasion on the palm of the hand
Contusion
Blood vessels affected
External bleeding is generally described in terms of the origin of the blood flow by vessel type. The basic categories of external bleeding are:
Arterial bleeding: As the name suggests, blood flow originating in an artery. With this type of bleeding, the blood is typically bright red in colour, due to the high degree of oxygenation. Blood typically exits the wound in spurts, rather than in a steady flow. The amount of blood loss can be copious, and can occur very rapidly.
Venous bleeding: This blood is flowing from a damaged vein. As a result, it will be a…(and so on)
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