@article{MTMT:1033940,
	title = {Transcranial Doppler-determined pulsatility index in the evaluation of endoscopic third ventriculostomy (preliminary data)},
	url = {https://m2.mtmt.hu/api/publication/1033940},
	author = {Vajda, Zsolt and Büki, András and Vető, Ferenc and Horváth, Zsolt and Sándor, János and Dóczi, Tamás Péter},
	doi = {10.1007/s007010050294},
	journal-iso = {ACTA NEUROCHIR},
	journal = {ACTA NEUROCHIRURGICA},
	volume = {141},
	unique-id = {1033940},
	issn = {0001-6268},
	abstract = {OBJECTIVE: Endoscopic 3rd ventriculostomy has become the method of choice in the 
		management of occlusive hydrocephalus. The treatment is accompanied by
		significantly less peri-operative complications than the cerebrospinal fluid
		shunting procedures previously employed. Close surveillance of patients, however,
		is necessary to avoid the consequences of raised intracranial pressure that may
		develop in case of obstruction of the artificial outlet of the 3rd ventricle. The
		aim of this study was to confirm the value of transcranial Doppler-determined
		pulsatility index (PI) in the assessment of the patency of endoscopic 3rd
		ventriculostomy and to elucidate its usefulness in early postoperative
		recognition of increased intracranial pressure. METHODS: In twenty-two patients
		suffering from occlusive hydrocephalus, transcranial Doppler sonography (TCD) was
		performed before, immediately after, and five days after endoscopic fenestration 
		of the floor of the 3rd ventricle. PI was defined with fast Fourier
		transformation. Mean PI values were determined in both middle cerebral arteries
		(MCA), over five cardiac cycles. RESULTS: In nineteen cases, PI values showed a
		significant decrease immediately as well as five days after the intervention as
		compared to the pre-operative values, and flow-sensitive MRI confirmed the
		patency of the fenestration in all cases. In one patient the operation failed to 
		produce an effective diversion of cerebrospinal fluid as shown by flow-sensitive 
		MRI, and the pulsatility index was unchanged. In two patients, a significant
		immediate postfenestration drop in PI was followed by a recurrence of PI to
		pre-operative levels without any clinical deterioration. CONCLUSIONS: Preliminary
		results suggest that the transcranial Doppler-determined pulsatility index is a
		useful non-invasive tool for the evaluation of the patency of the fenestration in
		the early follow-up of patients who underwent endoscopic third ventriculostomy.},
	year = {1999},
	eissn = {0942-0940},
	pages = {247-250}
}