geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Detection of intracranial internal carotid artery and middle cerebral artery vasospasm following subarachnoid hemorrhage


, : Detection of intracranial internal carotid artery and middle cerebral artery vasospasm following subarachnoid hemorrhage. Journal of Neuroimaging 6(1): 8-15

Little is known about the accuracy of transcranial Doppler (TCD) sonography in detecting intracranial internal carotid artery (IICA) and middle cerebral artery (MCA) vasospasm. TCD was performed in 49 patients with subarachnoid hemorrhage to evaluate 90 IICAs and 87 MCAs during the vasospasm period. When a mean velocity of at least 90 cm/sec was used to indicate IICA vasospasm, there were 11 positive, 42 negative, 4 false-positive, and 33 false-negative results. Sensitivity was 25% and specificity was 93%. When a mean velocity of at least 120 cm/sec was used to indicate MCA vasospasm, there were 15 positive, 45 negative, 3 false-positive, and 24 false-negative results (15 operator errors). Sensitivity was 38.5% and specificity was 93.7%. When the diagnostic criterion was changed to at least 130 cm/sec, specificities were 100% (IICA) and 96% (MCA) and positive predictive values were 100% (IICA) and 87% (MCA). The authors conclude that TCD accurately detects IICA and MCA vasospasm when flow velocities are at least 130 cm/sec. However, its sensitivity may be underestimated and the importance of operator error, overestimated.

US$29.90

PMID: 8555669


Other references

Kono, S.; Miyao, M.; Horita, T.; Hasegawa, M., 1963: Traumatic Injuries Of Joints Of The Lower Extremities And Their Treatment. Rinsho Geka. Journal of Clinical Surgery 18: 873-888

Gunnlaugsson, O., 1985: Angiodysplasia of the stomach and duodenum. Twenty-five angiodysplasias in the stomach and duodenum were identified with endoscopy in 12 patients. The average age of the patients was 70 years. Two patients had aortic stenosis. Six of the patients were treated with electrocoagulation, three...

Amitai Y.; Silver B.; Leikin J.B.; Frischer H., 1992: Visualization of ingested medications in the stomach by ultrasound. The authors describe a potential of ultrasound in detection of pills in the stomach, and report the first case of its use in a patient. Thirty pills were studied in vitro by ultrasound. All were clearly detected, with better imaging compared with...

Panampunnayil, S.U., 1987: Rostromysis bacescuii gen et sp nov and Megalopsis denticauda gen et sp nov Crustacea-Mysidacea from the south-west coast of Australia. Rostromysis bacescuii gen. et sp. nov. and Megalopsis denticauda gen. et sp. nov. belonging to the tribe Leptomysini are described from the south-west coast of Australia. The characters unique to the genus Rostromysis are the unusually long club-s...

Spadaro F.; Berridge C.W.; Dunn A.J., 1989: Interleukin 1 administration produces a stress like reduction of exploratory behavior in mice. Society for Neuroscience Abstracts 15(1): 8

Blackbeard, J., 1980: Weather doesnt worry sprout combine. Arable farming 7(2): 53

Mang, K.-Q.; Lee, T.-B.; Wang, X.-F., 1964: A comparative study of the free amino acids and amides in Chinese Cabbage leaves and roots infected by Turnip mosaic virus or by a strain of TMV from Chinese Rape. No differences were observed in the kinds of free amino acids and amides in roots of infected plants. Arginine appeared in leaves infected by turnip mosaic virus after the symptoms became conspicuous. Transitory increases occurred in asparagine, g...

Hofer, A.; Kovacs, G.; Zappatini, A.; Leuenberger, M.; Hediger, M.A.; Lochner, M., 2013: Design, synthesis and pharmacological characterization of analogs of 2-aminoethyl diphenylborinate (2-APB), a known store-operated calcium channel blocker, for inhibition of TRPV6-mediated calcium transport. 2-Aminoethyl diphenylborinate (2-APB) is a known modulator of the IP3 receptor, the calcium ATPase SERCA, the calcium release-activated calcium channel Orai and TRP channels. More recently, it was shown that 2-APB is an efficient inhibitor of the...

Gidrol X.; Chrestin H.; Mounoury G.; D'auzac J., 1988: Early activation by ethylene of the tonoplast proton pumping atpase in the latex from hevea brasiliensis. The treatment of Hevea brasiliensis (rubber tree) bark by chloro-2-ethyl phosphonic acid (Ethrel), and ethylene-producing compound, induces a significant increase in the tonoplast H+-translocating ATPase activity in the latex during the first 24 h...

Tanabe, T., 1990: Structure and function of the receptor for calcium channel blockers from skeletal muscle. Seikagaku. Journal of Japanese Biochemical Society 62(8): 1003-1019