[Study of acute supratentorial and infratentorial localized lesions by transcranial Doppler].
OBJECTIVE
To evaluate the correlation between increased intracranial pressure in supratentorial, infratentorial and TCD parameters of basal arteries.


METHODS
Sixteen New Zealand white rabbits were randomly divided into two groups: supratentorial group and infratentorial group. Intracranial pressures were raised after inflation of a preplaced epidural balloons. TCD parameters of the BA, rMCA were examined at intervals of 15 minutes after inflation of the balloon. ICP, ASP, HR, R were also recorded simultaneously.


RESULTS
1. The normal spectra of BA were characterized by a high-resistance, low-flow waveform. 2. At the 0.4 ml, 0.5 ml balloon volume level, ICP in supratentorial group was significantly increased than that in infratentorial group; 3. The correlation between ICP and MCA's TCD parameters were better than that between ICP and BA's TCD parameters in the supratentorial group. In the infratentorial group, the correlation between ICP and BA's TCD parameters were better than that between ICPs and MCA's TCD.


CONCLUSIONS
1. There are intracranial pressure gradients in mass lesions, so fibroptic probe should be placed at the place where the mass lesion takes place. 2. To perform non-invasive ICP monitoring by TCD, the basal artery should be chosen according to the mass lesions.
Zhang
Y H
YH
Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha 410008, China.
Liu
Y S
YS
Liu
S M
SM
D000208:Acute Disease; D000818:Animals; D015192:Infratentorial Neoplasms / Q000150:complications; D019586:Intracranial Hypertension / Q000000981:diagnostic imaging*; D011817:Rabbits; D011897:Random Allocation; D015173:Supratentorial Neoplasms / Q000150:complications; D017585:Ultrasonography, Doppler, Transcranial