Incidence and pathophysiology of severe hyponatraemia in neurosurgical patients

Background:Hyponatraemia is a well-recognised complication of neurosurgical conditions, but the incidence and implications have not been well documented.Objective:To define the incidence, pathophysiology and clinical implications of significant hyponatraemia in several neurosurgical conditions.Metho...

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Veröffentlicht in:Postgraduate medical journal 2009-04, Vol.85 (1002), p.171-175
Hauptverfasser: Sherlock, M, O’Sullivan, E, Agha, A, Behan, L A, Owens, D, Finucane, F, Rawluk, D, Tormey, W, Thompson, C J
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container_end_page 175
container_issue 1002
container_start_page 171
container_title Postgraduate medical journal
container_volume 85
creator Sherlock, M
O’Sullivan, E
Agha, A
Behan, L A
Owens, D
Finucane, F
Rawluk, D
Tormey, W
Thompson, C J
description Background:Hyponatraemia is a well-recognised complication of neurosurgical conditions, but the incidence and implications have not been well documented.Objective:To define the incidence, pathophysiology and clinical implications of significant hyponatraemia in several neurosurgical conditions.Methods:All patients admitted to the Irish National Neurosciences Centre at Beaumont Hospital, Dublin with traumatic brain injury, subarachnoid haemorrhage, intracranial neoplasm, pituitary disorders and spinal disorders who developed significant hyponatraemia (plasma sodium
doi_str_mv 10.1136/pgmj.2008.072819
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Data were collected by retrospective case note analysis.Results:Hyponatraemia was more common in patients with pituitary disorders (5/81, 6.25%; p = 0.004), traumatic brain injury (44/457, 9.6%; p<0.001), intracranial neoplasm (56/355, 15.8%; p<0.001) and subarachnoid haemorrhage (62/316, 19.6%; p<0.001) than in those with spinal disorders (4/489, 0.81%). The pathophysiology of hyponatraemia was: syndrome of inappropriate antidiuretic hormone secretion (SIADH) in 116 cases (62%) (31 (16.6%) drug-associated), hypovolaemic hyponatraemia in 50 cases (26.7%) (which included patients with insufficient data to assign to the cerebral salt-wasting group (CSWS)), CSWS in nine cases (4.8%), intravenous fluids in seven cases (3.7%) and mixed SIADH/CSWS in five cases (2.7%). Hyponatraemic patients with cerebral irritation had significantly lower plasma sodium concentrations (mean (SD) 124.8 (0.34) mmol/l) than asymptomatic patients (126.6 (0.29) mmol/l) (p<0.0001). Hyponatraemic patients had a significantly longer hospital stay (median 19 days (interquartile range (IQR) 12–28)) than normonatraemic patients (median 12 days (IQR 10.5–15)) (p<0.001).Conclusions:Hyponatraemia is common in intracerebral disorders and is associated with a longer hospital stay. Cerebral irritation is associated with more severe hyponatraemia. SIADH is the most common cause of hyponatraemia and is often drug-associated.]]></description><identifier>ISSN: 0032-5473</identifier><identifier>EISSN: 1469-0756</identifier><identifier>DOI: 10.1136/pgmj.2008.072819</identifier><identifier>PMID: 19417163</identifier><language>eng</language><publisher>London: The Fellowship of Postgraduate Medicine</publisher><subject>Adult ; Aged ; Biological and medical sciences ; Central Nervous System Diseases - surgery ; cerebral salt-wasting syndrome ; Electrolytes ; Epidemiology ; Female ; Fluids ; General aspects ; Humans ; Hypertension ; hyponatraemia ; Hyponatremia - etiology ; Inappropriate ADH Syndrome - etiology ; Laboratories ; Male ; Medical diagnosis ; Medical sciences ; Middle Aged ; Mortality ; Neurosciences ; neurosurgical ; Neurosurgical Procedures - adverse effects ; Plasma ; Public health. Hygiene ; Public health. Hygiene-occupational medicine ; Sodium ; syndrome of inappropriate antidiuretic hormone secretion ; Traumatic brain injury ; Tumors ; Urine</subject><ispartof>Postgraduate medical journal, 2009-04, Vol.85 (1002), p.171-175</ispartof><rights>2009 The Fellowship of Postgraduate Medicine</rights><rights>2009 INIST-CNRS</rights><rights>Copyright: 2009 2009 The Fellowship of Postgraduate Medicine</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-b495t-d1fcf236a815d6e19711e3e1405539e9b6a387117a505c0ab06ec6cfb953c8a53</citedby><cites>FETCH-LOGICAL-b495t-d1fcf236a815d6e19711e3e1405539e9b6a387117a505c0ab06ec6cfb953c8a53</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://pmj.bmj.com/content/85/1002/171.full.pdf$$EPDF$$P50$$Gbmj$$H</linktopdf><linktohtml>$$Uhttps://pmj.bmj.com/content/85/1002/171.full$$EHTML$$P50$$Gbmj$$H</linktohtml><link.rule.ids>114,115,314,776,780,3183,23550,27901,27902,77342,77373</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&amp;idt=21419893$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/19417163$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Sherlock, M</creatorcontrib><creatorcontrib>O’Sullivan, E</creatorcontrib><creatorcontrib>Agha, A</creatorcontrib><creatorcontrib>Behan, L A</creatorcontrib><creatorcontrib>Owens, D</creatorcontrib><creatorcontrib>Finucane, F</creatorcontrib><creatorcontrib>Rawluk, D</creatorcontrib><creatorcontrib>Tormey, W</creatorcontrib><creatorcontrib>Thompson, C J</creatorcontrib><title>Incidence and pathophysiology of severe hyponatraemia in neurosurgical patients</title><title>Postgraduate medical journal</title><addtitle>Postgrad Med J</addtitle><description><![CDATA[Background:Hyponatraemia is a well-recognised complication of neurosurgical conditions, but the incidence and implications have not been well documented.Objective:To define the incidence, pathophysiology and clinical implications of significant hyponatraemia in several neurosurgical conditions.Methods:All patients admitted to the Irish National Neurosciences Centre at Beaumont Hospital, Dublin with traumatic brain injury, subarachnoid haemorrhage, intracranial neoplasm, pituitary disorders and spinal disorders who developed significant hyponatraemia (plasma sodium <130 mmol/l) from January 2002 to September 2003 were identified from computerised laboratory records. Data were collected by retrospective case note analysis.Results:Hyponatraemia was more common in patients with pituitary disorders (5/81, 6.25%; p = 0.004), traumatic brain injury (44/457, 9.6%; p<0.001), intracranial neoplasm (56/355, 15.8%; p<0.001) and subarachnoid haemorrhage (62/316, 19.6%; p<0.001) than in those with spinal disorders (4/489, 0.81%). The pathophysiology of hyponatraemia was: syndrome of inappropriate antidiuretic hormone secretion (SIADH) in 116 cases (62%) (31 (16.6%) drug-associated), hypovolaemic hyponatraemia in 50 cases (26.7%) (which included patients with insufficient data to assign to the cerebral salt-wasting group (CSWS)), CSWS in nine cases (4.8%), intravenous fluids in seven cases (3.7%) and mixed SIADH/CSWS in five cases (2.7%). Hyponatraemic patients with cerebral irritation had significantly lower plasma sodium concentrations (mean (SD) 124.8 (0.34) mmol/l) than asymptomatic patients (126.6 (0.29) mmol/l) (p<0.0001). Hyponatraemic patients had a significantly longer hospital stay (median 19 days (interquartile range (IQR) 12–28)) than normonatraemic patients (median 12 days (IQR 10.5–15)) (p<0.001).Conclusions:Hyponatraemia is common in intracerebral disorders and is associated with a longer hospital stay. Cerebral irritation is associated with more severe hyponatraemia. SIADH is the most common cause of hyponatraemia and is often drug-associated.]]></description><subject>Adult</subject><subject>Aged</subject><subject>Biological and medical sciences</subject><subject>Central Nervous System Diseases - surgery</subject><subject>cerebral salt-wasting syndrome</subject><subject>Electrolytes</subject><subject>Epidemiology</subject><subject>Female</subject><subject>Fluids</subject><subject>General aspects</subject><subject>Humans</subject><subject>Hypertension</subject><subject>hyponatraemia</subject><subject>Hyponatremia - etiology</subject><subject>Inappropriate ADH Syndrome - etiology</subject><subject>Laboratories</subject><subject>Male</subject><subject>Medical diagnosis</subject><subject>Medical sciences</subject><subject>Middle Aged</subject><subject>Mortality</subject><subject>Neurosciences</subject><subject>neurosurgical</subject><subject>Neurosurgical Procedures - adverse effects</subject><subject>Plasma</subject><subject>Public health. 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Data were collected by retrospective case note analysis.Results:Hyponatraemia was more common in patients with pituitary disorders (5/81, 6.25%; p = 0.004), traumatic brain injury (44/457, 9.6%; p<0.001), intracranial neoplasm (56/355, 15.8%; p<0.001) and subarachnoid haemorrhage (62/316, 19.6%; p<0.001) than in those with spinal disorders (4/489, 0.81%). The pathophysiology of hyponatraemia was: syndrome of inappropriate antidiuretic hormone secretion (SIADH) in 116 cases (62%) (31 (16.6%) drug-associated), hypovolaemic hyponatraemia in 50 cases (26.7%) (which included patients with insufficient data to assign to the cerebral salt-wasting group (CSWS)), CSWS in nine cases (4.8%), intravenous fluids in seven cases (3.7%) and mixed SIADH/CSWS in five cases (2.7%). Hyponatraemic patients with cerebral irritation had significantly lower plasma sodium concentrations (mean (SD) 124.8 (0.34) mmol/l) than asymptomatic patients (126.6 (0.29) mmol/l) (p<0.0001). Hyponatraemic patients had a significantly longer hospital stay (median 19 days (interquartile range (IQR) 12–28)) than normonatraemic patients (median 12 days (IQR 10.5–15)) (p<0.001).Conclusions:Hyponatraemia is common in intracerebral disorders and is associated with a longer hospital stay. Cerebral irritation is associated with more severe hyponatraemia. SIADH is the most common cause of hyponatraemia and is often drug-associated.]]></abstract><cop>London</cop><pub>The Fellowship of Postgraduate Medicine</pub><pmid>19417163</pmid><doi>10.1136/pgmj.2008.072819</doi><tpages>5</tpages></addata></record>
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source Oxford University Press Journals All Titles (1996-Current); MEDLINE; BMJ Journals - NESLi2
subjects Adult
Aged
Biological and medical sciences
Central Nervous System Diseases - surgery
cerebral salt-wasting syndrome
Electrolytes
Epidemiology
Female
Fluids
General aspects
Humans
Hypertension
hyponatraemia
Hyponatremia - etiology
Inappropriate ADH Syndrome - etiology
Laboratories
Male
Medical diagnosis
Medical sciences
Middle Aged
Mortality
Neurosciences
neurosurgical
Neurosurgical Procedures - adverse effects
Plasma
Public health. Hygiene
Public health. Hygiene-occupational medicine
Sodium
syndrome of inappropriate antidiuretic hormone secretion
Traumatic brain injury
Tumors
Urine
title Incidence and pathophysiology of severe hyponatraemia in neurosurgical patients
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