title: [Follow-up of infra-inguinal bypass operations: value of the peak systolic velocity and arm-ankle index for evaluation of femorodistal reconstructions].
abstract: In a prospective study, the efficacy of noninvasive surveillance techniques including measurement of ABI and duplex-derived velocity parameters was studied after 74 infrainguinal arterial reconstructions. A decrease of ABI > or = 0.2 compared with prior examinations was considered abnormal. Results of the duplex scan were interpreted as abnormal when PSV was less than 45 cm/sec or greater than 200 cm/sec or when an interval decrease of greater than 30 cm/sec occurred. All patients meeting any of these criteria during the follow-up examinations were subjected to i.a. DSA. The combination of all duplex velocity criteria was significantly more sensitive to identify a failing graft than was measurement of ABI (90% vs. 18%; p = 0.00004). When independent variables (ABI- and PSV criteria, monophasic curve configuration) were entered into a logistic regression multivariate analysis, the model proved to be effective (F-value 5.551; df 4.8; R2 = 0.735; significance 98.03%; p < 0.02) in predicting angiogram findings (dependent variable). ABI measurements (significance 4.75%; p > 0.95) and the presence of a monophasic curve configuration (significance 89.58%; p > 0.1) failed to reach significance in the multivariate analysis. By excluding these latter parameters, the statistical power for the model could be improved (F-value 1036.57; df 2.1; R2 = 0.999; significance 97.69%; p = 0.0231): As a result normal PSV criteria indicated normal and abnormal angiographic findings in 83 and 17%, respectively. A PSV less than 45 cm/sec or greater than 200 cm/sec was suggestive of an abnormal angiogram in 80% and of a normal angiogram in 20%. The corresponding figures for a PSV interval decrease > 30 cm/sec were 71% and 29%. In conclusion, PSV parameters were found to be measurably more accurate to identify a failing graft than was measurement of ABI.
authors: Klinik für Gefäss- und Thoraxchirurgie, Zentralklinikum, Augsburg.
authors: K D
authors: KD
authors: Wölfle
authors: H
authors: H
authors: Bruijnen
authors: B
authors: B
authors: Mayer
authors: H
authors: H
authors: Loeprecht
mesh_terms: D000368:Aged; D001783:Blood Flow Velocity / Q000502:physiology; D001807:Blood Vessel Prosthesis; D005260:Female; D005263:Femoral Artery / Q000000981:diagnostic imaging / Q000601:surgery; D006801:Humans; D007511:Ischemia / Q000000981:diagnostic imaging / Q000601:surgery*; D007866:Leg / Q000098:blood supply*; D008297:Male; D011183:Postoperative Complications / Q000000981:diagnostic imaging*; D013599:Systole / Q000502:physiology*; D018616:Ultrasonography, Doppler, Duplex
vernacular_title: Verlaufskontrolle infrainguinaler Bypassoperationen: Bedeutung von systolischer Spitzengeschwindigkeit und Arm-Knöchel-Index für die Bewertung femorodistaler Rekonstruktionen.