Diagnosis of Bipolar Disorder
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Like other mental illnesses, bipolar disorder cannot yet be identified physiologically—for example, through a blood test or a brain scan. A diagnosis of bipolar disorder is made on the basis of symptoms, course of illness, and, when available, family history. The diagnostic criteria for bipolar disorder are described in the Diagnostic and Statistical Manual for Mental Disorders, fourth edition (DSM-IV).
Bipolar disorder is often diagnosed based on the following:
- Initial assessment—Your doctor will ask about your symptoms: when they started, how long they have lasted, how severe they are, whether you have had them before, and if so, whether the symptoms were treated and what treatment was given. You will also be asked about your medical and family history. In addition, your doctor may wish to interview your family members and/or other persons close to you.
- Physical exam—Your doctor should give you a thorough physical exam. You may be given several lab tests to rule out other causes for your moods and behavior, such as ]]>hyperthyroidism]]> or ]]>hypothyroidism]]> . If a physical cause for your symptoms is ruled out, you may be referred to a psychiatrist for a psychological evaluation.
Psychological evaluation—After you see your regular doctor, a psychiatrist is probably the best healthcare professional to evaluate your symptoms. Diagnosis of bipolar disorder is based on:
- Presence of symptoms over time
- Absence of medications that could cause mood symptoms or medical or neurological illness that may look like bipolar disorder
- Family history of bipolar disorder
Mania is diagnosed if abnormally elevated mood (lasting at least one week) occurs with three or more of the other symptoms of mania. If your mood is irritable, four additional symptoms must be present.
Depression is diagnosed if depressed mood or loss of interest in pleasure occurs every day (or nearly every day) over the last two weeks, and it is accompanied by five or more of the symptoms.
A diagnostic evaluation may include a mental status exam to determine if your speech, thought patterns, or memory have been affected, as sometimes happens in the case of bipolar disorder.
American Psychiatric Association. Diagnosis and Statistical Manual of Mental Disorders . 4th ed. Arlington, VA: American Psychiatric Publishing, Inc; 2000.
American Psychiatric Association. Practice guideline for the treatment of patients with bipolar disorder (revision). Am J Psychiatry. 2002;159:1-50.
Bipolar disorder. National Institute of Mental Health website. Available at: http://www.nimh.nih.gov/ . Updated June 2008. Accessed September 9, 2008.
Carson RC, Butcher JN. Abnormal Psychology and Modern Life . 11th ed. New York, NY: Allyn and Bacon; 2000.
Kaye NS. Is your depressed patient bipolar? J Am Board Am Pract. 2005;18:271-281.
Last reviewed June 2008 by ]]>Janet H. Greenhut, MD, MPH]]>
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.
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