Diagnosis Of Disease Of A Patient

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The first step in correct diagnosis of disease of a patient is to know his medical history. Physician should carefully ask patient information about his/her symptoms such as the onset, duration, and possible relief. The next step is physical examination of the patient. After listening to the patient 's description of the history of the symptoms, physicians generally conduct a physical examination. Inspection, Palpation, Percussion and Auscultation are the four components of physical examination. In general inspection, physician examines general body posture and proportion of the patient and then site of injury is inspected locally. After inspection, physician uses his/her hands and fingers to feel the body of the patient to know the body temperature as well as to feel underlying parts of body of the patient. This procedure is known as palpation. After palpation, physician taps body parts to get information about density of tissues and this is known as percussion. Finally, Auscultation is listening to body sounds with the help of stethoscope.
The pressure of blood exerted on the walls of arteries is called arterial blood pressure or simply blood pressure. It helps to propel blood at a high velocity along the arteries. Blood pressure is taken with an instrument called sphygmomanometer and the unit of blood pressure is usually millimetres of mercury (mm Hg). The blood pressure, by this instrument, is measured in terms of air pressure when the air pressure becomes equal to the
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