tailieunhanh - Báo cáo khoa học: "Transcranial Doppler ultrasound analysis of resistive index in rostral and caudal cerebral arteries in dogs"

Tuyển tập các báo cáo nghiên cứu khoa học quốc tế về bệnh thú y đề tài: Transcranial Doppler ultrasound analysis of resistive index in rostral and caudal cerebral arteries in dogs | J. Vet. Sci. 2005 6 1 61-66 JOURNAL OF Veterinary Science Transcranial Doppler ultrasound analysis of resistive index in rostral and caudal cerebral arteries in dogs Minho Seo Hojung Choi Kichang Lee Mincheol Choi Junghee Yoon College of Veterinary Medicine Seoul National University Seoul 151-742 Korea Transcranial Doppler TCD was carried out to determine the resistive index RI values of normal canine cerebral arteries and its reproducibility and to evaluate the change of cerebral vascular resistance following diuretics administration. RI values of rostral cerebral artery RCA were compared between fontanelle window and temporal window. Normal ranges and reproducibility of the RI values were examined in the rostal cerebral artery RCA and caudal cerebral artery CCA . And after administration of diuretics TCD-derived RI values were measured at RCA and CCA. Cerebral vascular RI values of RCA and CCA were and in the normal dogs respectively. There was no significant difference of RI between male and female between fontanelle window and temporal window. Reproducibility of RI measurements between intraobserver and interobserver were relatively high. The RI of RCA and CCA were significantly increased 15 minutes after mannitol administration p and returned to baseline values by 30 minutes but it did not significantly change after furosemide and saline administration. The results suggest that TCD is a useful test which can obtain reproducible results from any window and has the advantage of detecting subtle changes in cerebral vascular resistance. Key words Transcranial Doppler ultrasound diuretics dogs Introduction The use of Doppler ultrasound to estimate blood flow velocity was described in 1960 but it was only in the 1980s that it was appreciated that sufficient ultrasound would pass through the skull to allow the detection of blood flow within the intracranial circulation 1 . To achieve sufficient bone penetration low frequency 2 MHz ultrasound