2013年9月19日星期四

Emergency Care : Vomiting and Nausea







Vomiting (known medically as emesis) is the forceful expulsion of the contents of one’s stomach through the mouth and sometimes the nose. Nausea is a sensation of unease and discomfort in the upper stomach with an involuntary urge to vomit.




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A headache or cephalalgia is pain anywhere in the region of the head or neck. It can be a symptom of a number of different conditions of the head and neck. The brain tissue itself is not sensitive to pain because it lacks pain receptors. Rather, the pain is caused by disturbance of the pain-sensitive structures around the brain. Several areas of the head and neck have these pain-sensitive structures, which are the cranium (the periosteum of the skull), muscles, nerves, arteries and veins, subcutaneous tissues, eyes, ears, sinuses and mucous membranes.



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Epistaxis or a nosebleed is the relatively common occurrence of hemorrhage from the nose, usually noticed when the blood drains out through the nostrils. There are two types: anterior (the most common), and posterior (less common, more likely to require medical attention). Sometimes in more severe cases, the blood can come up the nasolacrimal duct and out from the eye. Fresh blood and clotted blood can also flow down into the stomach and cause nausea and vomiting.


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Definition
A burn is a type of injury to flesh caused by heat, electricity, chemicals, light, radiation or friction. Most burns affect only the skin (epidermal tissue and dermis). Rarely, deeper tissues, such as muscle, bone, and blood vessels can also be injured. Burns may be treated with first aid, in an out-of-hospital setting, or may require more specialised treatment such as those available at specialised burn centers.


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Definition
Abdominal pain or stomach ache can range in intensity from a mild stomach ache to severe acute pain. The pain is often nonspecific and can be caused by a variety of conditions. Many organs are found within the abdominal cavity. Sometimes the pain is directly related to a specific organ such as the bladder or ovary, while other times it is more diffuse or non-specific. Usually, abdominal pain originates in the digestive system. For example, the pain can be caused by appendicitis, diarrheal cramping, or food poisoning.


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Definition
Sprain is a stretch and tear of one or more ligament that connects two or more bones at a joint in our body. The seriousness of the injury depends directly on the extent of injury and the number of ligaments affected.

Grade of sprain
Grade I – Mild Sprain
Mild sprain happens due to overstretching or tearing of ligaments with no instability in joint. The patient generally experiences less pain, swelling and little or no loss in functional ability.




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Syncope is the medical term for fainting, is precisely defined as a transient loss of consciousness and postural tone characterized by rapid onset, short duration, and spontaneous recovery due to global cerebral hypoperfusion that most often results from hypotension. Many forms of syncope are preceded by a prodromal state that often includes dizziness and loss of vision (“blackout”), nausea and abdominal discomfort, weakness, sweating, a feeling of heat, palpitations and other phenomena, which, if they do not progress to loss of consciousness and postural tone are often denoted “presyncope”.


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Low blood pressure, or hypotension, occurs when blood pressure during and after each heartbeat is much lower than usual. This means the heart, brain, and other parts of the body do not get enough blood.


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Blood pressure is a measurement of the force against the walls of your arteries as the heart pumps blood through the body. Hypertension is the term used to describe high blood pressure.
Blood pressure readings are measured in millimeters of mercury (mmHg) and usually given as two numbers — for example, 120 over 80 (written as 120/80 mmHg). One or both of these numbers can be too high.


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