eMedicine Specialties > Pulmonology > Sleep-Related Disorders

Insomnia: Differential Diagnoses & Workup

Author: Peter Smethurst, MD, Attending Physician, Pulmonary, Critical Care and Sleep Medicine, St Joseph's Medical Center
Coauthor(s): Silverio M Santiago, MD, Clinical Professor of Medicine, University of California at Los Angeles School of Medicine; Chief, Department of Pulmonary and Critical Care Medicine, Medical Director, Sleep Disorders Center, Veterans Affairs Medical Center of West Los Angeles; James A Rowley, MD, Associate Professor, Fellowship Program Director, Department of Medicine, Division of Pulmonary, Critical Care and Sleep Medicine, Wayne State University School of Medicine
Contributor Information and Disclosures

Updated: Jul 25, 2008

Differential Diagnoses

Depression
Obstructive Sleep Apnea-Hypopnea Syndrome

Other Problems to Be Considered

Restless Legs Syndrome
Periodic Limb Movement Disorder
Sleeplessness and Circadian Rhythm Disorder
Inadequate sleep hygiene

Workup

Laboratory Studies

  • Patients with a history suggestive of chronic obstructive pulmonary disease and insomnia should have an arterial blood gas determination performed to determine if they are hypoxemic.
    • Insomnia associated with chronic obstructive pulmonary disease frequently begins with the development of nocturnal hypoxemia, although nocturnal hypoxemia is not required for insomnia to occur. Treatment with oxygen may improve the condition, but it rarely eliminates the insomnia. Nocturnal hypoxemia is present if the patient has daytime hypoxemia and frequently if he or she has exercise-related hypoxemia.
    • If the arterial blood gas result is negative for hypoxemia, an exercise desaturation study or overnight oximetry may be helpful to determine if the patient needs oxygen.

Other Tests

  • Refer patients with a history suggestive of sleep apnea or RLS/PLMD to a sleep center for possible polysomnography.
  • Neurologic testing may be indicated in patients with signs and symptoms of neurologic disease.

More on Insomnia

Overview: Insomnia
Differential Diagnoses & Workup: Insomnia
Treatment & Medication: Insomnia
Follow-up: Insomnia
Multimedia: Insomnia
References

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Further Reading

Keywords

insomnia, sleeplessness, insomniac, sleep disturbance, sleep disorder, inadequate sleep quality, sleep complaint, transient insomnia, adjustment sleep disorder, short-term insomnia, chronic insomnia, fatigue-related motor vehicle accident, hyperarousability, hyper-arousability, sleep hygiene

Contributor Information and Disclosures

Author

Peter Smethurst, MD, Attending Physician, Pulmonary, Critical Care and Sleep Medicine, St Joseph's Medical Center
Disclosure: Nothing to disclose.

Coauthor(s)

Silverio M Santiago, MD, Clinical Professor of Medicine, University of California at Los Angeles School of Medicine; Chief, Department of Pulmonary and Critical Care Medicine, Medical Director, Sleep Disorders Center, Veterans Affairs Medical Center of West Los Angeles
Silverio M Santiago, MD is a member of the following medical societies: American Academy of Sleep Medicine, American College of Chest Physicians, and American Thoracic Society
Disclosure: Nothing to disclose.

James A Rowley, MD, Associate Professor, Fellowship Program Director, Department of Medicine, Division of Pulmonary, Critical Care and Sleep Medicine, Wayne State University School of Medicine
James A Rowley, MD is a member of the following medical societies: American Academy of Sleep Medicine, American College of Chest Physicians, American College of Physicians, and American Thoracic Society
Disclosure: Nothing to disclose.

Medical Editor

Gregory Tino, MD, Director of Pulmonary Outpatient Practices, Associate Professor, Department of Medicine, Division of Pulmonary, Allergy, and Critical Care, University of Pennsylvania Medical Center and Hospital
Gregory Tino, MD is a member of the following medical societies: American College of Chest Physicians, American College of Physicians, and American Thoracic Society
Disclosure: Nothing to disclose.

Pharmacy Editor

Francisco Talavera, PharmD, PhD, Senior Pharmacy Editor, eMedicine
Disclosure: Nothing to disclose.

Managing Editor

Daniel R Ouellette, MD, FCCP, Associate Professor of Medicine, Wayne State University School of Medicine; Consulting Staff, Pulmonary Disease and Critical Care Medicine Service, Henry Ford Health System
Daniel R Ouellette, MD, FCCP is a member of the following medical societies: American College of Chest Physicians and American Thoracic Society
Disclosure: Boehringer Ingleheim Honoraria Speaking and teaching; Pfizer Honoraria Speaking and teaching

CME Editor

Harold H Harsch, MD, Program Director of Geropsychiatry, Department of Geriatrics/Gerontology, Associate Professor, Department of Psychiatry and Department of Medicine, Froedtert Hospital, Medical College of Wisconsin
Harold H Harsch, MD is a member of the following medical societies: American Psychiatric Association
Disclosure: lilly Honoraria Speaking and teaching; BMS Honoraria Speaking and teaching; Forest Labs Honoraria Speaking and teaching; AstraZeneca Honoraria Speaking and teaching; Pfizer Grant/research funds Other; Northstar Grant/research funds Other; Novartis  Other; Pfizer Honoraria Speaking and teaching

Chief Editor

Zab Mosenifar, MD, Director, Division of Pulmonary and Critical Care Medicine, Director, Women's Guild Pulmonary Disease Institute, Executive Vice Chair, Department of Medicine, Cedars Sinai Medical Center; Professor of Medicine, David Geffen School of Medicine at UCLA
Zab Mosenifar, MD is a member of the following medical societies: American College of Chest Physicians, American College of Physicians, American Federation for Medical Research, and American Thoracic Society
Disclosure: Nothing to disclose.

 
 
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