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the diagnosisof DIND requires a new clinical neurological abnormality orsubstantiveworsening
of overall neurologic status. For example, if thepatient'sdaily GCS score
deteriorates =2 points, be suspicious of DIND. However,if the patient has
no new neurologic abnormality after surgery,thediagnosis
of DIND cannot be made, even if the patient has angiographic
vasospasm or high TCD velocities. TCD and/or angiographic abnormalitiescan
support the diagnosis of DIND but, in the absence of new neurologicsignsor
symptoms, they are not sufficient.
What if the patient has vasospasm (appropriate abnormalities
seenon TCD or angiogram) but receives intensive prophylactic therapy to prevent
DIND (e.g., hypervolemic, hypertensive, hemodilution, or vasopressors/inotropes
to increase perfusion)? Shouldn't that count as DIND? Answer: No. Ifthere
are no new neurologic signs or symptoms, DIND does not exist.
What if the patient has new neurologic symptoms that
are consistentwith DIND (see the Operations Manual or the new IE pocket
notebook)butwe don't have TCD or angiography to prove it? Can we makethe
diagnosisof DIND? Answer: Yes, but… The diagnosis ofDIND
is primarilybased on the time of onset of the deficits (5-10 days afterSAH),
the natureof the deficits (decreased level of consciousness with orwithout
focaldeficits) and the exclusion of other causes of delayed neurologicdeterioration(rebleeding,
hematoma, hydrocephalus, brain edema, seizures,etc.). PositiveTCD or angiographic
findings are not required to makethe diagnosis.But,the constellation
of new signs and symptoms shouldbe consistent with DIND.
What if the patient has new neurologic symptoms that
are consistentwith DIND but TCD (or angiogram) indicate that there is novasospasm?
Canwe make the diagnosis of DIND? Answer: Probablynot. If, usingreliable
methodology vasospasm is found to be absent, then the causeof
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the neurologic deterioration
is probably notDIND, but some other condition (see above). If the patient
has some formof significant neurologic deterioration that cannot be categorized
as DINDor any other neurologic IE (e.g., NOT 601-meningitis; 610-recurrent
SAH;631-seizure; 632-brain swelling; etc.) then IE code 635-Other Significant
Neurologic Disorder or Complication should probably be used. When in doubt,
discuss with your local PI and/or call the CCC.
Recurrent Subarachnoid Hemorrhage [IE Code 610]and
item #8 inSection H (page 6) of the ANESTHESIOLOGIST form
Recurrent Subarachnoid Hemorrhage is defined as: EXCEPT forthe primary
aneurysmal subarachnoid hemorrhage, ANY instance when any subarachnoidhemorrhage
occurs for ANY reason, except direct surgical manipulation.What
does this mean?
If any new subarachnoid hemorrhage occurs before
going tosurgery, regardless if the bleeding originates from the aneurysm
thatlead to the patient's presentation (i.e., rebleeding), or from
yetanother intracranial aneurysm, it should be reported.
If any new subarachnoid hemorrhage occurs after going
to surgery,regardless if the bleeding originates from the aneurysm that
lead to thepatient's presentation, or from yet another intracranial aneurysm,
itshould be reported.
What about aneurysmal bleeding that occurs during surgery?
Item#8 of Section H (page 6) of the ANESTHESIOLOGIST form originally
asked whether or not the "Patient had a recurrent subarachnoid hemorrhage."
However,thisquestion has been changed. The
new revised ANESTHESIOLOGISTform is dated 040600 (bottom
right hand corner) and Item #8 now reads "Patienthad a recurrent subarachnoid
hemorrhage not due to surgical manipulation."This change was madewith
the last Operations Manual revisions that weredistributed in April (seeIHAST2
Operations Manual Chapter IX, page 44,
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