Scopus İndeksli Açık & Kapalı Erişimli Yayınlar

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Subject: search.filters.subject.Doppler ultrasonography

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    Portal Venous Flow Alterations in Hepatic Artery Thrombosis Following Liver Transplant
    (2022) Tezcan, Sehnaz; Ozturk, Ozturk, Funda Ulu; Soy, Ebru Ayvazoglu; Uslu, Nihal; Haberal, Mehmet; https://orcid.org/0000-0001-7204-3008; https://orcid.org/0000-0002-0993-9917; https://orcid.org/0000-0002-3462-7632; 30702049; AAC-5566-2019; AAJ-8097-2021
    Objectives: The hepatic vasculature is a unique system due to a dual supply that includes the hepatic artery and portal vein, which interact when the liver vascular supply is decreased. Hepatic artery buffer response, an intrinsic regulatory mechanism that compensates for blood supply, maintains increased hepatic artery flow and caliber in response to portal vein failure. Previous studies revealed that portal vein flow showed no alterations to establish adequate blood supply in response to hepatic artery occlusion. Here, we analyzed portal vein flow changes in patients with hepatic artery thrombosis after liver transplant. Materials and Methods: From December 1988 to October 2017, our center performed 580 liver trans plant procedures. Those diagnosed with hepatic artery thrombosis (19 females, 24 males) by Doppler ultrasonography during postoperative week 1 were analyzed. Patients received either surgery or endovascular treatment for hepatic artery thrombosis, with patency confirmed by Doppler ultrasonography. We compared portal vein flow velocity and caliber before and after treatment using Wilcoxon signed rank and Mann Whitney U tests. Results: Mean patient age was 18.9 +/- 21.4 years. Portal vein flow velocity pretreatment (median of 70 cm/s) was significantly higher than posttreatment (median of 52 cm/s) in all patients (P < .001). Median flow velocity decreased significantly after treatment when subgroups were compared, including age (adult vs child), transplant type (orthotopic transplant vs living donor), and treatment (surgery vs endovascular). However, portal vein flow velocity showed a significantly higher decrease in the surgery subgroup than in the endovascular treatment subgroup (P = .018). There was no significant relationship between portal vein calibers before and after treatment (P = .36). Conclusions: The significant decrease in portal vein flow velocity after successful treatment of hepatic artery thrombosis may represent a compensatory flow change of the portal vein in response to diminished hepatic artery flow.
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    The Effect of Coronary Angiography and Femoral Access on Femoral Artery Distensibility and Elasticity
    (2021) Gunesli, Aylin; Acibuca, Aynur; 33791115
    Aim of the study: The aim of this study was to evaluate the long-term effects of access to the femoral artery for the purposes of coronary angiography through the measurement of femoral artery distensibility and elasticity on the accessed and non-accessed sides. Material and methods: This cross- sectional study included patients who underwent femoral angiography at least 1 year previously. Those whose femoral artery was accessed once formed Group 1 (n = 59), those who were accessed twice formed Group 2 (n = 57), those accessed 3 times formed Group 3 (n = 55), and those with more than 3 accesses, Group 4 (n = 60). The groups were compared in respect of femoral artery elasticity and distensibility in the accessed and non-accessed sides. Results: No statistically significant difference was determined in respect of femoral distensibility and elasticity in Group 1 (9.40 +/- 0.84 vs 9.48 +/- 0.75, p = 0.107 and 0.23 +/- 0.03 vs 0.23 +/- 0.03, p = 0.433, respectively). However, a significant difference was observed between the two sides in terms of distensibility and elasticity in Group 2 (9.02 +/- 0.81 vs 9.23 +/- 0.75, and 0.21 +/- 0.02 vs 0.22 +/- 0.02), in Group 3 (8.49 +/- 0.77 vs 9.18 +/- 0.9 and 0.19 +/- 0.02 vs 0.21 +/- 0.02), and in Group 4 (8.14 +/- 0.74 vs 9.03 +/- 0.81 and 0.16 +/- 0.01 vs 0.2 +/- 0.02, p <0.001, for all comparisons). Conclusion: While a single access in the femoral artery for coronary angiography does not affect femoral artery elasticity and distensibility, multiple accesses may have adverse effects.