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	eMedicine - Syndrome of Inappropriate Antidiuretic Hormone Secretion : Article by Robert J Ferry, Jr
		The natriuresis, which occurs in SIADH despite hyponatremia and further contributes to hyponatremia, is produced by a decrease in proximal tubular sodium reabsorption secondary to the expansion of the extracellular fluid volume.
		SIADH is often first recognized on finding hypotonic hyponatremia in a child without other major symptoms and in the absence of dehydration.
		SIADH in children is most often observed in association with intracranial disease or injury (ie, infection, brain abscesses, encephalitis) and in postoperative patients.
	www.emedicine.com /ped/topic2190.htm (6168 words)

	p980826b - SIADH and Demeclocycline (Site not responding. Last check: )
		SIADH is a common cause of hyponatremia in hospitalized patients.
		SIADH may result from a variety of diseases, as well as from the use of drugs such as chlorpropamide, carbamazepine, diuretics, and some antineoplastic agents.
		Diagnosis of SIADH is confirmed by demonstration of a high urine osmolality with a low plasma osmolality, in the absence of diuretic use.
	www.emory.edu /WHSCL/grady/amreport/litsrch98/p980826b.html (286 words)

	Syndrome of Inappropriate Antidiuretic Hormone Secretion (SIADH) - Children's Hospital Boston
		SIADH occurs when excessive levels of antidiuretic hormones (hormones that help the kidneys, and body, conserve the correct amount of water) are produced.
		SIADH tends to occur in people with heart failure or people with a diseased hypothalamus (the part of the brain that works directly with the pituitary gland to produce hormones).
		The most commonly prescribed treatment for SIADH is fluid restriction of between 30 to 75 percent of normal fluid intake, depending on the severity of the disorder.
	www.childrenshospital.org /az/Site1660/printerfriendlypageS1660P0.html (0 words)

	SIADH
		Since this intake is almost always exceeded by urine output and insensible losses, a negative water balance ensues that results in gradual reduction in weight, rise in serum sodium and osmolality, and symptomatic improvement.
		Note isotonic saline is unsuitable in SIADH; the resulting sodium rise is small and transient, with the infused salt being excreted in concentrated urine and thereby causing a net retention of water and worsening of hyponatremia.
		Patients with hyponatremia induced by thiazides may be hypovolemic or euvolemic, depending on the magnitude of the sodium and potassium loss, stimulation of thirst, impaired urinary dilution, and water retention.
	www.endocrinology.med.ucla.edu /siadh.htm (0 words)

	Continuing Medical Education (CME):Princeton Media Associates- Current Trends in Hyponatremia in the Elderly CNE
		SIADH is characterized by the consistent release of antidiuretic hormone (ADH) along with body fluid dilution and increased extracellular fluid volume.
		Although this is not commonly seen in the elderly, it is possible that an older individual could gain exposure to this, and questioning with regard to the use of elicit drugs should be part of the evaluation of the individual with otherwise unexplained hyponatremia.
		The general characteristics are that it is hyponatremia of the SIADH type in the absence of an identifiable cause, generally occurring in individuals older than 80 years of age, and for reasons, which are unclear, occurring predominantly in races other than fl.
	www.princetoncme.com /public/2004-77/report2.html (4928 words)

	Etiology- Hyponatremia: (Site not responding. Last check: )
		SIADH is the most common cause of hospital acquired hyponatremia.
		The causes of SIADH are highly variable and include but are not limited to inappropriate secretion of ADH secondary to structural lesions (tumors, CNS diseases, lung diseases) and drug induced hyponatremia (due to antineoplastics, oral hypogycemics, diuretics, clfibrat, carbamazeprine and morphine-like analgesics).
		SIADH has also been observed to develop in some children during the acute phase of meningitis.
	pbl.cc.gatech.edu /mindy/32 (674 words)

	News from Lexi-Comp, Inc.
		SIADH is the most common cause of euvolemic hyponatremia.
		In SIADH, as described above, the urine sodium concentration is usually >40 mEq/L whereas, in hypovolemia, it is typically <20 mEq/L. SIADH is often characterized by low or low-normal uric acid levels, as opposed to hypovolemia which often has a normal or even high level.
		This is in contrast to SIADH in which intravenous saline may not improve the sodium concentration and may even worsen the hyponatremia.
	www.lexi.com /web/news.jsp?id=100039 (1240 words)

	Oncology Nursing Society.
		SIADH can occur as a result of an endocrine paraneoplastic syndrome, which implies that the syndrome is caused indirectly by a malignancy and not the direct result of invasion and damage by malignant cells (Haapoja, 1997; Keenan, 1999).
		SIADH of malignancy is the inappropriate, uncontrolled secretion of ADH, which causes increased water reabsorption by the renal tubules that leads to decreased excretion of water (Jones, 1999).
		Symptoms of SIADH in patients with cancer are influenced by the rate of onset and the severity of hyponatremia (Flombaum, 2000).
	www.ons.org /publications/journals/ONF/Volume30/Issue3/3003381.asp (3648 words)

	Syndrome of Inappropriate ADH
		CONCLUSIONS: Amiodarone-induced SIADH may occur during the initial loading period, and it may be improved by reduction of the dose without discontinuation of the drug.
		SIADH is characterised by the sustained release of antidiuretic hormone (ADH) from the posterior pituitary.
		The SIADH occurred in about one-third of the children hospitalized for pneumonia, and was associated with a more severe disease and a poorer outcome.
	www.thedoctorsdoctor.com /diseases/siadh.htm (4482 words)

	eMedicine - Syndrome of Inappropriate Antidiuretic Hormone Secretion : Article by Alexandr Rafailov
		The key to the pathophysiology, signs, symptoms, and eventual treatment of SIADH is an understanding that the hyponatremia is a result of excess water and not a sodium deficiency.
		The tetracycline antibiotic demeclocycline has been used successfully to treat chronic SIADH that is refractory to water restriction or in patients who are noncompliant with water restriction.
		This therapy rarely is instituted in the ED and generally is instituted by (or in consultation with) a nephrologist or primary care physician.
	www.emedicine.com /emerg/topic784.htm (0 words)

	Syndrome of Inappropriate Antidiuretic Hormone Secretion (SIADH)
		SIADH tends to occur in people with heart failure or people with a diseased hypothalamus (the part of the brain that works directly with the pituitary gland to produce hormones).
		In addition to a complete medical history and physical examination, to confirm diagnosis of SIADH, blood tests will need to be performed to measure sodium, potassium chloride levels, and osmolality (concentration of solution in the blood).
		The most commonly prescribed treatment for SIADH is fluid restriction of between 30 to 75 percent of normal fluid intake, depending on the severity of the disorder.
	www.healthsystem.virginia.edu /UVAHealth/peds_diabetes/siadh.cfm (364 words)

	Hyponatremia in neurological diseases in ICU Lath Rahul
		In SIADH, the fluid intake is restricted, whereas in CSWS the treatment involves fluid and salt replacement.
		The SIADH is a volume-expanded condition, whereas CSWS is a volume-contracted state that involves renal loss of sodium.
		Currently, the physiological conditions behind the increased urinary sodium concentrations associated with SIADH is not understood, although natriuresis associated with SIADH has been attributed to an increase in the glomerular filtration rate and/or a decrease in renal tubular sodium resorption, which is induced by either hormonal or direct neural effects.
	www.ijccm.org /article.asp?issn=0972-5229;year=2005;volume=9;issue=1;spage=47;epage=51;aulast=Lath (1889 words)

	UpToDate Urine output in the SIADH
		— The syndrome of inappropriate secretion of antidiuretic hormone (SIADH) is a disorder in which water excretion is partially impaired because of the inability to shut off the secretion of ADH [1].
		As an example, an increase in water intake sequentially lowers the plasma osmolality, decreases ADH secretion, and reduces collecting tubule permeability to water; the net effect is the rapid excretion of the excess water in a dilute urine.
		Suppose that a patient has moderately severe SIADH with a urine osmolality that cannot be reduced below 750 mosmol/kg (normal minimum urine osmolality is 40 to 100 mosmol/kg).
	patients.uptodate.com /topic.asp?file=fldlytes/22275 (475 words)

	Case 20: Brain Lesions in an American Traveler (Site not responding. Last check: )
		This is a patient with malaise, orthostasis, sweats, hyponatremia, and diffuse pulmonary infiltrates.
		However, the diffuse nature of the nodular infiltrate on the chest CT is not consistent with a primary lung tumor.
		SIADH should be suspected in any patient with hyponatremia, hypo-osmolality, a urine osmolality above 100 mOsm/kg, a urine sodium concentration that is above 40 meq/L, and a normal acid-base status.
	www.hopkins-aids.edu /educational/caserounds/caserounds_20.html (1492 words)

	Hyponatremia : Epilepsy.com/Professionals
		Water excretion may be deficient because of renal dysfunction, or it may be inhibited by the persistent release of ADH induced by volume depletion or the secretion of inappropriate ADH.
		SIADH is confirmed by inappropriately elevated urine osmolality (often above 300 mOsm/kg) and urine sodium concentration (usually above 40 mEq/liter).
		If fluid must be given to patients with SIADH, then the osmolality of the administered fluid must exceed the osmolality of the urine.
	professionals.epilepsy.com /page/electroab_hyponatremia.html (742 words)

	cmaj.ca -- eLetters for Trindade et al., 159 (10) 1245-1252
		The syndrome of SIADH was defined as serum sodium <125mmol/L, serum osmolarity <280mOsm/kg, urine sodium >20 mmol/L, urine osmolarity >100mOsm/kg.
		Drug are thought to cause SIADH by direct or indirect stimulation of vasopressin release from the posterior pituitary gland through unknown mechanism (6).
		Among the published case reports of SSRI induced SIADH, this was the only reported case in Chinese and was one of the patients with the youngest age and the fewest co- morbidities.
	www.cmaj.ca /cgi/eletters/159/10/1245 (1410 words)

	SYNDROME OF INNAPROPRIATE ADH SECRETION (SIADH)
		Antidiuretic hormone (ADH) is secreted by the posterior pituitary gland (neurohypophysis) and acts on the kidneys to induce water retention primarily at the level of the collecting ducts.
		SIADH results from innapropriate ADH secretion resulting in innapropriate retention of ingested/infused water.
		A patient with SIADH has a urine osmolality = 600 mmol/L and is given 1L of 0.9% normal saline.
	www.uwo.ca /cns/resident/pocketbook/medicine/kidney/siadh.html (681 words)

	BioMed Central \| Full text \| Severe symptomatic hyponatremia during citalopram therapy - a case report
		Estimations of the occurrence of hyponatremia during treatment with SSRIs range between 0.5% and 25%, and the risk of hyponatremia seems to be greatest during the first weeks of treatment with SSRI, in the elderly, in female patients and in patients with lower body weights [3,4].
		A diagnosis of SIADH was made based on clinical euvolemia in the presence of hyponatremia with a urine osmolarity and sodium that were inappropriately high.
		Potential risk factors for SIADH due to citalopram included advanced age, female gender, concomitant use of medications known to cause SIADH or hyponatremia, and possibly, higher citalopram doses [7,8,17].
	www.biomedcentral.com /1471-2369/5/2 (1449 words)

	Syndrome of Inappropriate Antidiuretic Hormone Secretion (SIADH) - Children's Hospital of Philadelphia
		SIADH tends to occur in children with heart failure or children with a diseased hypothalamus (the part of the brain that works directly with the pituitary gland to produce hormones).
		In children, symptoms of SIADH may limit themselves to low sodium levels in the blood without any symptoms of fluid overload.
		The most commonly prescribed treatment for SIADH is fluid restriction to between 30 to 75% of normal fluid intake, depending on the severity of the disorder.
	www.chop.edu /consumer/your_child/condition_section_index.jsp?id=-9057 (358 words)

	UpToDate Treatment of hyponatremia: SIADH and reset osmostat
		Appropriate therapy in this disorder is dependent upon the degree of hyponatremia and the presence or absence of symptoms.
		Severe hyponatremia may also be associated with potassium loss; since potassium is as osmotically active as sodium, the loss of potassium contributes to the reductions in the plasma osmolality and sodium concentration.
		— Water restriction is the mainstay of therapy in asymptomatic hyponatremia and in chronic SIADH due for example to a small cell carcinoma of the lung.
	patients.uptodate.com /topic.asp?file=fldlytes/31514 (543 words)

	UCLA Department of Medicine - wfsection-The Syndrome of Inappropriate Secretion of Antidiuretic Hormone and Small Cell ...
		Pathophysiologically, SIADH is characterized by increased release of antidiuretic hormone (ADH) which leads to excessive water resorption and dilutional hyponatremia.
		In conclusion, SIADH is a common cause of hypona-tremia in hospitalized patients and the most common cause of hyponatremia in cancer patients.
		If SIADH is a paraneoplastic phenomenon, treatment of the underlying malignancy often leads to resolution of SIADH although recurrence with cancer relapse is common.
	www.med.ucla.edu /modules/wfsection/article.php?articleid=292 (1737 words)

	Case Report
		We report a case of tuberculous meningitis with severe hyponatremia in whom SIADH was initially considered as the cause and later diagnosed as cerebral salt wasting syndrome (CSWS) based on certain clinical fi ndings and laboratory parameters.
		Both the conditions are associated with increased urinary sodium excretion and increased release of a natriuretic peptide (Brain natriuretic peptide in CSWS and Atrial natriuretic peptide in SIADH).
		We report this patient with tuberculous meningitis in whom the diagnosis of cerebral salt wasting syndrome was made based on severe volume depletion, high urinary sodium concentration and excretion, hypouricemia with high fractional excretion of uric acid and correction of hyponatremia and volume status with saline and fi udrocortisone therapy.
	www.japi.org /may2006/CR-403.htm (1065 words)

	Sodium: Minerals and Electrolytes: Merck Manual Home Edition
		Symptoms of SIADH tend to be those of the hyponatremia (low sodium level in the blood) that accompanies it.
		SIADH is also associated with several other disorders, including meningitis, encephalitis, psychosis, and some lung disorders (including pneumonia and acute respiratory failure).
		Drugs that decrease the effect of antidiuretic hormone on the kidneys (for example, demeclocycline or thiazide diuretics) may be given if the sodium level in the blood falls even more or does not rise despite restriction of fluid intake.
	www.merck.com /mmhe/print/sec12/ch155/ch155k.html (1342 words)

	AllRefer Health - Dilutional Hyponatremia (SIADH) (SIADH, Syndrome of Inappropriate Antidiuretic Hormone Secretion)
		Dilutional hyponatremia is a disorder of fluid and electrolyte balance caused by excessive release of antidiuretic hormone (ADH).
		The most common cause of SIADH is a type of lung cancer called "oat cell" or small cell, which secretes excessive ADH.
		SIADH may also develop in some children during the acute phase of meningitis.
	health.allrefer.com /health/dilutional-hyponatremia-siadh-info.html (0 words)

	Syndrome of Inappropriate Antidiuretic Hormone Secretion (SIADH) - Lucile Packard Children's Hospital
		SIADH occurs when excessive levels of antidiuretic hormones (hormones that help the kidneys, and body, conserve the correct amount of water) are produced.
		The symptoms of SIADH may resemble other problems or medical conditions.
		Lucile Packard Children's Hospital is located in Palo Alto, adjacent to Stanford University Hospital, approximately 20 miles north of San Jose, CA and 40 miles south of San Francisco.
	www.lpch.org /DiseaseHealthInfo/HealthLibrary/diabetes/siadh.html (384 words)

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