Seminars in neurology
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Some of the most common reasons for metabolic neurologic disturbances in the setting of a general hospital are frequently encountered electrolyte and related osmolality disorders. Hyperosmolality is usually related to hypernatremia and/or hyperglycemia. Identifying the cause and carefully calculating the water deficit is crucial to appropriate management. ⋯ In acutely developing hyponatremia, hypertonic saline is required, whereas in slowly developing hyponatremia, water restriction and slow correction is required to avoid the syndrome of osmotic demyelination. Disorders of potassium metabolism are also common electrolyte disorders seen in the general hospital. Appropriate diagnosis and management of hyperkalemia and hypokalemia are also discussed.
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Brain injury continues to be a leading cause of mortality and morbidity in patients resuscitated after cardiac arrest. During periods of hypoxia and ischemia, numerous mechanisms contribute to the initial and secondary injury of the brain. ⋯ Practice guidelines are now available for prognostication and postresuscitation care, with emphasis on improving survival and quality of life. Also reviewed are a wide spectrum of postarrest neurologic complications and their targeted treatments.
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Seminars in neurology · Apr 2011
ReviewUremic encephalopathy and other brain disorders associated with renal failure.
Kidney failure is one of the leading causes of disability and death and one of the most disabling features of kidney failure and dialysis is encephalopathy. This is probably caused by the accumulation of uremic toxins. Other important causes are related to the underlying disorders that cause kidney failure, particularly hypertension. ⋯ Sleep disorders, including Ekbom's syndrome (restless legs syndrome) are also common in patients with kidney failure. Renal replacement therapies are also associated with particular neurologic complications including acute dialysis encephalopathy and chronic dialysis encephalopathy, formerly known as dialysis dementia. The treatments and prevention of each are discussed.
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Seminars in neurology · Feb 2011
Review Case ReportsOffice evaluation of spine and limb pain: spondylotic radiculopathy and other nonstructural mimickers.
Low back and neck pain, with or without radiculopathy, are one of the most common reasons for referral to an outpatient neurology practice. Determining appropriate treatment relies on establishing an accurate diagnosis of the etiology of the spine or limb pain. The author reviews structural radiculopathies as a result of diskogenic and spondylotic etiologies with an emphasis on the clinical approach and evaluation of these patients (including imaging and electrodiagnostics), identifying management altering neurogenic mimickers of structural radiculopathies (such as infectious, inflammatory, and neoplastic myeloradiculitis and radiculoplexopathies), and stratifying patients for treatment.
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"Dizziness" is a common presenting symptom to a neurologist in the outpatient setting. Dizziness can occur as a result of a vestibular disorder involving the peripheral or central vestibular pathways or nonvestibular centers as the result of a disorder of balance, proprioceptive input, or autonomic nervous system dysfunction. A careful clinical history and examination along with ancillary testing can usually lead to determination of the underlying disorder and implementation of the appropriate treatment. The authors review the general approach to the "dizzy" patient in an office-based neurology practice, focusing on the clinical diagnostic features that may help to determine the etiology and treatment options for the dizzy patient.