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Taking a history: Introduction and the presenting complaint

In the first of a two part series about taking a medical history, Nayankumar Shah takes a look at the introduction and the presenting complaint

By: Nayankumar Shah

The clinical encounter usually consists of the steps shown in fig 1. A good history is very important for making a diagnosis. Examination and investigations may help to confirm or refute the diagnosis made from the history.

The history will also tell you about the illness as well as the disease. The illness is the subjective component and describes the patient's experience of the disease.

Try to follow the sequence history, examination, investigation when you see a patient. A common mistake is to rush into investigations before considering the history or examination.

It is easy to mindlessly order a battery of tests. There are many problems with this approach: Investigations cannot be used in isolation—is the x ray finding or blood test result relevant or an incidental finding?Investigations can be inaccurate—there can be problems with technique, reagents, or interpretation of the findingsInvestigations pose risks—radiation exposure, unnecessary further procedures, and so

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