The psychiatric interview and mental state examination

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CHAPTER 1 The psychiatric interview and mental state examination

The key to psychiatric assessment is a comprehensive history and mental state examination. The history needs to cover the history of the presenting complaint, past psychiatric history and a longitudinal perspective of the patient, with important ‘milestones’ and events highlighted. A family history is also important.

The mental state is similar to the physical examination in general medicine, and provides a comprehensive cross-sectional assessment of signs and symptoms.

Any relevant physical examination and laboratory tests need to be performed to cover treatable ‘organic’ causes and contributors to the psychiatric presentation. This is covered in Chapter 2 of this book.

Finally, a formulation, working diagnosis and differential diagnosis should be arrived at. The formulation essentially brings together in a pithy yet comprehensive way all the factors relevant to the patient presenting in a particular way at a particular time.

The framework presented here is taken largely from the so-called ‘Maudsley’ approach, named after the famous London psychiatric hospital. For a more detailed expostulation of the Maudsley approach, see the ‘References and further reading’ at the end of this chapter. This schema is for use in adults: adaptations for children and adolescents, and the elderly, are provided in Chapters 16 and 17, respectively. Special considerations pertinent to people with an intellectual disability are given in Chapter 19.

The history

The taking of a thorough history requires patience and skill. The initial phase of the interview is used to establish rapport with the patient, to put both you and the patient at ease, and to set the agenda for the interview. Always introduce yourself, say why you are there, the sort of areas you want to cover, and the approximate time frame. It is better to start with a general and non-threatening topic (e.g. one would not immediately ask about child sexual abuse). The sort of opening phrase could be:

Reassuring the patient that your interview is confidential, but that you work as part of a team and do share information with them, sets the parameters nicely.

The main areas covered in the history are shown in Box 1.1. Of course, there is some flexibility about the sequence of questions, but ensure you cover the major areas. Generally, starting with non-directive, ‘open’ questions is recommended, later honing in on specific issues with more focused questioning. Certain issues such as suicidality must always be assessed thoroughly (see Ch 15 for a suggested approach).