| Schminke U |
------>authors3_c= ------>paper_class1=1 ------>Impact_Factor=1.625 ------>paper_class3=2 ------>paper_class2=1 ------>vol=16 ------>confirm_bywho=None ------>insert_bywho=d102093012 ------>Jurnal_Rank=53.9 ------>authors4_c= ------>comm_author= ------>patent_EDate=None ------>authors5_c= ------>publish_day=1 ------>paper_class2Letter=None ------>page2=259 ------>medlineContent= ------>unit=E0123 ------>insert_date=20081205 ------>iam=3 ------>update_date=None ------>author=??? ------>change_event=1 ------>ISSN= ------>authors_c= ------>score=500 ------>journal_name=J Neuroimaging. ------>paper_name=Screening for High-grade Carotid Stenosis Using a Portable Ultrasonography Instrument. ------>confirm_date=None ------>tch_id=096053 ------>pmid=16808827 ------>page1=252 ------>fullAbstract=BACKGROUND AND PURPOSE: We investigated the diagnostic performance of a brief Power Doppler Imaging (PDI) screening examination for carotid artery stenoses using a newly developed portable instrument. METHODS: A highly experienced sonographer screened in total 152 carotid arteries by either continuous wave (cw) Doppler (n= 50) or a lightweight (2.4 kg) portable duplex device (n= 102) in a prospective study of 76 high-risk patients. The screening protocols included either spectrum analysis and frequency shift measurement in both internal carotid arteries with cw-Doppler or determination of area and diameter ratios in transverse and longitudinal views of both carotid arteries in B-mode and with PDI, but without velocity measurement. Both protocols were evaluated against a complete routine duplex ultrasonography examination. RESULTS: According to the complete examination, stenoses were <50% in 73 of 102 (71.6%), 50-75% in 19 of 102 (18.6%), 75-95% in 7 of 102 (6.9%), and occluded in 3 of 102 (2.9%) arteries (PDI cohort), and <50% in 39 of 50 (78%), 50-75% in 8 of 50 (16%), 75-95% in 2 of 50 (4%), and occluded in 1 of 50 (2%) artery (cw-Doppler cohort). Mean screening time was 8.8 +/- 2.5 minute (PDI) and 9.4 +/- 2.6 minute (cw-Doppler). For stenoses >75%, A(z) values (area under the receiver operating characteristics curve) were 0.897 for area ratios, 0.843 for diameter ratios (PDI protocol) and 1.0 for the cw-Doppler protocol. CONCLUSIONS: The diagnostic performance of the cw-Doppler protocol was superior to the PDI protocol. Nevertheless, both protocols appear suitable as inexpensive screening strategies to identify subjects with >75% stenosis measured by carotid Doppler ultrasound. However, these preliminary data need further verification. ------>tmu_sno=None ------>sno=20509 ------>authors2=Motsch L ------>authors3=Lien LM ------>authors4=Tan TY ------>authors5=Bond MG ------>authors6=Toole JF, Tegeler CH. ------>authors6_c= ------>authors=Schminke U ------>delete_flag=0 ------>SCI_JNo=None ------>authors2_c= ------>publish_area=0 ------>updateTitle=Screening for high-grade carotid stenosis using a portable ultrasonography instrument. ------>language=2 ------>check_flag=None ------>submit_date=None ------>country=None ------>no=3 ------>patent_SDate=None ------>update_bywho=None ------>publish_year=2006 ------>submit_flag=None ------>publish_month=7 |