title: Intraparenchymal Doppler ultrasound after proximal embolization of the splenic artery in trauma patients.
abstract: We studied the changes in proximal embolization of the splenic artery to the intraparenchymal blood flow with Doppler ultrasound. Seventeen trauma patients with spleen injury OIS grade 2-5 underwent embolization of the splenic artery. Peak-systolic velocity (PSV) and end-diastolic velocity (EDV) were measured in intrasplenic arteries initially 1 day after embolization, at early follow-up after 7 days, at intermediate follow-up after 10 weeks, and at late follow-up after 10 months. Resistance index (RI), systolic/diastolic ratio (S/D ratio), acceleration (AC), and acceleration time (AT) were calculated. The results were compared to values from 17 volunteers. RI increased from 0.39 initially to 0.49 (P = 0.002) at intermediate and to 0.52 (P < 0.001) at late follow-up. S/D ratio increased from 1.68 initially to 1.99 (P = 0.002) and to 2.10 (P < 0.001) at intermediate and late follow-up, respectively. Follow-up results of RI and S/D ratio differed significantly from the reference group. AC increased from 1.06 m/s(2) initially to 1.89 m/s(2) at late follow-up (P = 0.01). AC at late follow-up was not different from reference group (2.33 m/s(2)). In conclusion, Doppler ultrasound is a useful tool in the evaluation of improvable intraparenchymal blood flow over time after central splenic artery embolization.
authors.affiliation: Department of Radiology, Ullevaal University Hospital, Oslo, Norway. johannd@medisin.uio.no
authors.forename: Johann B
authors.initials: JB
authors.lastname: Dormagen
authors.forename: Christine
authors.initials: C
authors.lastname: Gaarder
authors.forename: Leiv
authors.initials: L
authors.lastname: Sandvik
authors.forename: Pål A
authors.initials: PA
authors.lastname: Naess
authors.forename: Nils E
authors.initials: NE
authors.lastname: Kløw
mesh_terms: D000293:Adolescent; D000328:Adult; D000792:Angiography; D001783:Blood Flow Velocity; D004621:Embolization, Therapeutic / Q000379:methods*; D005260:Female; D006801:Humans; D015601:Injury Severity Score; D008297:Male; D008875:Middle Aged; D013157:Splenic Artery / Q000000981:diagnostic imaging* / Q000293:injuries*; D016896:Treatment Outcome; D018608:Ultrasonography, Doppler / Q000379:methods*