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{{Subdural empyema}}
{{Subdural empyema}}
{{CMG}}; {{AE}} {{JS}}
{{CMG}} {{AE}} {{JS}}; {{AG}}


==Overview==
==Overview==
Subdural empyema, also referred to as [[subdural abscess]], [[pachymeningitis interna]] and [[circumscript meningitis]], is a life-threatening [[infection]].<ref name="AgrawalTimothy2007">{{cite journal|last1=Agrawal|first1=Amit|last2=Timothy|first2=Jake|last3=Pandit|first3=Lekha|last4=Shetty|first4=Lathika|last5=Shetty|first5=J.P.|title=A Review of Subdural Empyema and Its Management|journal=Infectious Diseases in Clinical Practice|volume=15|issue=3|year=2007|pages=149–153|issn=1056-9103|doi=10.1097/01.idc.0000269905.67284.c7}}</ref> It consists of a localised collection of [[pus|purulent]] material, usually unilateral, between the [[dura mater]] and the [[arachnoid mater]] and accounts for about 15-22% of the reported focal intracranial [[infections]]  The [[empyema]] may develop intracranially (about 95%) or in the [[spinal canal]] (about 5%), and in both cases, it constitutes a [[medical emergency|medical]] and [[surgical emergency|neurosurgical emergency]].<ref name="pmid12521560">{{cite journal| author=Greenlee JE| title=Subdural Empyema. | journal=Curr Treat Options Neurol | year= 2003 | volume= 5 | issue= 1 | pages= 13-22 | pmid=12521560 | doi= | pmc=|url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=12521560  }} </ref>
If left untreated, patients with subdural empyema may develop severe [[fever]], [[headache]], [[nausea]], [[vomiting]], and [[seizures]]. Untreated subdural empyema may also lead to [[coma]] and subsequent [[mortality]]. Complications of subdural empyema include [[status epilepticus]], neurological deficits, and [[thrombosis]]. Prognosis is generally good with [[antimicrobial]] therapy.


==Natural History==
==Natural History==
Subdural empyema is considered a [[neurosurgery|neurosurgical]] emergency. If left untreated, subdural empyema frequently evolves into severe [[fever]], [[headache]], [[nausea]], [[vomiting]], [[seizures]], [[coma]], and subsequent [[mortality]].


==Complications==
==Complications==
Subdural Empyema is a condition which if not treated appropriately and in a timely manner can progress into serious complications, which may lead invariably to a fatal outcome. An untreated subdural empyema may evolve into: <ref name="AgrawalTimothy2007">{{cite journal|last1=Agrawal|first1=Amit|last2=Timothy|first2=Jake|last3=Pandit|first3=Lekha|last4=Shetty|first4=Lathika|last5=Shetty|first5=J.P.|title=A Review of Subdural Empyema and Its Management|journal=Infectious Diseases in Clinical Practice|volume=15|issue=3|year=2007|pages=149–153|issn=1056-9103|doi=10.1097/01.idc.0000269905.67284.c7}}</ref>
Complications to subdural empyema include:<ref name="AgrawalTimothy2007">{{cite journal|last1=Agrawal|first1=Amit|last2=Timothy|first2=Jake|last3=Pandit|first3=Lekha|last4=Shetty|first4=Lathika|last5=Shetty|first5=J.P.|title=A Review of Subdural Empyema and Its Management|journal=Infectious Diseases in Clinical Practice|volume=15|issue=3|year=2007|pages=149–153|issn=1056-9103|doi=10.1097/01.idc.0000269905.67284.c7}}</ref>
*[[status epilepticus]]
*[[Status epilepticus]]
*spreading cortico-venous sinus [[thrombosis]]
*Neurological deficits
*[[cerebritis]]
*[[Thrombosis]]
*[[cerebral edema]]
*[[Cerebritis]]
*[[cerebral coning]]
*[[Cerebral edema]]
*death
*[[Cerebral infarction]]
 
*[[Hydrocephalus]]
There may also be complications from the treatment of the empyema, such as:
*[[Osteomyelitis]]
*Damage to the [[bridging veins]] during the [[craniotomy]] procedure to evacuate the empyema.
*Damage to the [[bridging veins]]


==Prognosis==
==Prognosis==
The outcome will depend on: <ref name="AgrawalTimothy2007">{{cite journal|last1=Agrawal|first1=Amit|last2=Timothy|first2=Jake|last3=Pandit|first3=Lekha|last4=Shetty|first4=Lathika|last5=Shetty|first5=J.P.|title=A Review of Subdural Empyema and Its Management|journal=Infectious Diseases in Clinical Practice|volume=15|issue=3|year=2007|pages=149–153|issn=1056-9103|doi=10.1097/01.idc.0000269905.67284.c7}}</ref>
Prognosis is generally good with [[antimicrobial]] thearpy. The outcome is dependent on:<ref name="AgrawalTimothy2007">{{cite journal|last1=Agrawal|first1=Amit|last2=Timothy|first2=Jake|last3=Pandit|first3=Lekha|last4=Shetty|first4=Lathika|last5=Shetty|first5=J.P.|title=A Review of Subdural Empyema and Its Management|journal=Infectious Diseases in Clinical Practice|volume=15|issue=3|year=2007|pages=149–153|issn=1056-9103|doi=10.1097/01.idc.0000269905.67284.c7}}</ref>
*preoperative level of consciousness
*Preoperative level of [[consciousness]]
*start time of the treatment
*Commencement of treatment
*treatment aggressiveness
*Treatment duration
*progress of the disease
*Disease progression
There may be identified some prognostic factors associated with subdural empyema: <ref name="AgrawalTimothy2007">{{cite journal|last1=Agrawal|first1=Amit|last2=Timothy|first2=Jake|last3=Pandit|first3=Lekha|last4=Shetty|first4=Lathika|last5=Shetty|first5=J.P.|title=A Review of Subdural Empyema and Its Management|journal=Infectious Diseases in Clinical Practice|volume=15|issue=3|year=2007|pages=149–153|issn=1056-9103|doi=10.1097/01.idc.0000269905.67284.c7}}</ref>
 
*Unfavorable Prognostic Factors:
#Presenting with encephalopathy or coma
#Younger than 10 years or elderly
#Late start of antibiotics
#Sterile cultures
*Favorable Prognostic Factors:
#Craniotomy instead of burr holes as surgical procedure
#Early treatment
 
#Young age (optimal between 10-20 years)


#Patient presents awake, alert and oriented
Patient education is imperative as failure to follow antibiotic therapy will adversely affect the outcome of the treatment. Identified prognostic factors associated with subdural empyema include:<ref name="AgrawalTimothy2007">{{cite journal|last1=Agrawal|first1=Amit|last2=Timothy|first2=Jake|last3=Pandit|first3=Lekha|last4=Shetty|first4=Lathika|last5=Shetty|first5=J.P.|title=A Review of Subdural Empyema and Its Management|journal=Infectious Diseases in Clinical Practice|volume=15|issue=3|year=2007|pages=149–153|issn=1056-9103|doi=10.1097/01.idc.0000269905.67284.c7}}</ref>


#Source of infection: paranasal sinuses
'''Unfavorable Prognostic Factors'''
*Presentation with [[encephalopathy]] or [[coma]]
*Age: younger than 10 years or elderly
*Delayed commencement of [[antibiotics]]
*[[Burr hole]] placement
*Sterile cultures


#Aerobic streptococci isolated in culture
'''Favorable Prognostic Factors'''
#aerobic streptococci as single pathogen
*[[Craniotomy]]
*Early treatment
*Young age (optimal between 10-20 years)
*Patient presents awake, alert and oriented
*Source of [[infection]]: [[paranasal sinuses]]
*[[Aerobic]] [[Streptococci]] isolated in culture
*[[Aerobic]] [[Streptococci]] as single pathogen


==References==
==References==
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: João André Alves Silva, M.D. [2]; Anthony Gallo, B.S. [3]

Overview

If left untreated, patients with subdural empyema may develop severe fever, headache, nausea, vomiting, and seizures. Untreated subdural empyema may also lead to coma and subsequent mortality. Complications of subdural empyema include status epilepticus, neurological deficits, and thrombosis. Prognosis is generally good with antimicrobial therapy.

Natural History

Subdural empyema is considered a neurosurgical emergency. If left untreated, subdural empyema frequently evolves into severe fever, headache, nausea, vomiting, seizures, coma, and subsequent mortality.

Complications

Complications to subdural empyema include:[1]

Prognosis

Prognosis is generally good with antimicrobial thearpy. The outcome is dependent on:[1]

  • Preoperative level of consciousness
  • Commencement of treatment
  • Treatment duration
  • Disease progression

Patient education is imperative as failure to follow antibiotic therapy will adversely affect the outcome of the treatment. Identified prognostic factors associated with subdural empyema include:[1]

Unfavorable Prognostic Factors

Favorable Prognostic Factors

References

  1. 1.0 1.1 1.2 Agrawal, Amit; Timothy, Jake; Pandit, Lekha; Shetty, Lathika; Shetty, J.P. (2007). "A Review of Subdural Empyema and Its Management". Infectious Diseases in Clinical Practice. 15 (3): 149–153. doi:10.1097/01.idc.0000269905.67284.c7. ISSN 1056-9103.



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