Diffusion kurtosis imaging and arterial spin labeling for the noninvasive evaluation of persistent post-contrast acute kidney injury

Background and Purpose: Ipsilateral thalamic diaschisis (ITD) initially describes functional depression of the thalamus ipsilateral to a supratentorial lesion, but accumulating evidence has shown morphological changes also occur. Therefore, we aimed to characterize thalamic perfusion and diffusion related to ITD over time and their inter-relationships after middle cerebral artery infarction. Methods: Eighty-five patients with middle cerebral artery infarction who underwent diffusion kurtosis imaging and arterial spin labeling were retrospectively included. ITD was diagnosed as ipsilateral thalamic hypoperfusion present on ≥2 cerebral blood flow maps. The thalamic asymmetrical index was calculated as (ipsilateral value−contralateral value)/contralateral value×100%. Finally, the inter-relationships of thalamic perfusion and diffusion were analyzed. Results: ITD was present in 56/85 patients (65.9%, ITD+). In ITD+ patients, larger abnormal perfusion volume, higher perfusion-infarct mismatch and lower rates of focal hyperperfusion were observed than ITD− patients. Infarction affecting the corona radiata were more frequent among ITD+ patients. Mean kurtosis were slightly but significantly increased within the ipsilateral thalamus compared with the contralateral one in ITD+ patients of subacute and chronic groups, while fractional anisotropy was significantly increased in subacute group but decreased in chronic group for both ITD+ and ITD− patients. Mean diffusivity was significantly increased in ITD+ patients of chronic group. Furthermore, the AI CBF was negatively and significantly correlated with AI MK and AI FA in ITD+ patients in subacute group, and AI MD , even after adjustment for abnormal perfusion volume and days from symptoms onset, in chronic group. ITD+ patients had significantly higher National Institutes of Health Stroke Scale and modified Rankin Scale scores at admission and discharge and also showed a trend to independent association with clinical outcome at discharge. Conclusions: The combination of arterial spin labeling and diffusion kurtosis imaging can reveal early, time-specific thalamic perfusion and diffusion changes after middle cerebral artery infarction. ITD-related hypoperfusion was significantly correlated with underlying microstructural alterations.

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Radiology departmental policy compliance with Swedish guidelines regarding post-contrast acute kidney injury for examinations with iodinated contrast media

Radiography ◽

10.1016/j.radi.2021.04.009 ◽

2021 ◽

Author(s):

A. Bjällmark ◽

M. Bazzi ◽

M. Karlsson ◽

E. Krakys ◽

J. Kihlberg

Keyword(s):

Acute Kidney Injury ◽

Contrast Media ◽

Kidney Injury ◽

Iodinated Contrast Media ◽

Policy Compliance ◽

Post Contrast ◽

Iodinated Contrast

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The Impact of Post-contrast Acute Kidney Injury on In-hospital Mortality After Endovascular Thrombectomy in Patients With Acute Ischemic Stroke

Frontiers in Neurology ◽

10.3389/fneur.2021.665614 ◽

2021 ◽

Vol 12 ◽

Author(s):

Mona Laible ◽

Ekkehart Jenetzky ◽

Markus Alfred Möhlenbruch ◽

Martin Bendszus ◽

Peter Arthur Ringleb ◽

...

Keyword(s):

Acute Kidney Injury ◽

Ischemic Stroke ◽

Hospital Mortality ◽

Acute Ischemic Stroke ◽

Kidney Injury ◽

Stroke Severity ◽

Post Contrast ◽

Endovascular Thrombectomy ◽

Symptomatic Intracerebral Hemorrhage ◽

The Impact

Background and Purpose: Clinical outcome and mortality after endovascular thrombectomy (EVT) in patients with ischemic stroke are commonly assessed after 3 months. In patients with acute kidney injury (AKI), unfavorable results for 3-month mortality have been reported. However, data on the in-hospital mortality after EVT in this population are sparse. In the present study, we assessed whether AKI impacts in-hospital and 3-month mortality in patients undergoing EVT.Materials and Methods: From a prospectively recruiting database, consecutive acute ischemic stroke patients receiving EVT between 2010 and 2018 due to acute large vessel occlusion were included. Post-contrast AKI (PC-AKI) was defined as an increase of baseline creatinine of ≥0.5 mg/dL or >25% within 48 h after the first measurement at admission. Adjusting for potential confounders, associations between PC-AKI and mortality after stroke were tested in univariate and multivariate logistic regression models.Results: One thousand one hundred sixty-nine patients were included; 166 of them (14.2%) died during the acute hospital stay. Criteria for PC-AKI were met by 29 patients (2.5%). Presence of PC-AKI was associated with a significantly higher risk of in-hospital mortality in multivariate analysis [odds ratio (OR) = 2.87, 95% confidence interval (CI) = 1.16–7.13, p = 0.023]. Furthermore, factors associated with in-hospital mortality encompassed higher age (OR = 1.03, 95% CI = 1.01–1.04, p = 0.002), stroke severity (OR = 1.05, 95% CI = 1.03–1.08, p < 0.001), symptomatic intracerebral hemorrhage (OR = 3.20, 95% CI = 1.69–6.04, p < 0.001), posterior circulation stroke (OR = 2.85, 95% CI = 1.72–4.71, p < 0.001), and failed recanalization (OR = 2.00, 95% CI = 1.35–3.00, p = 0.001).Conclusion: PC-AKI is rare after EVT but represents an important risk factor for in-hospital mortality and for mortality within 3 months after hospital discharge. Preventing PC-AKI after EVT may represent an important and potentially lifesaving effort in future daily clinical practice.

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Atrial Fibrillation and Chronic Kidney Disease—A Risky Combination for Post-Contrast Acute Kidney Injury

Journal of Clinical Medicine ◽

10.3390/jcm10184140 ◽

2021 ◽

Vol 10 (18) ◽

pp. 4140

Author(s):

Łukasz Kuźma ◽

Anna Tomaszuk-Kazberuk ◽

Anna Kurasz ◽

Małgorzata Zalewska-Adamiec ◽

Hanna Bachórzewska-Gajewska ◽

...

Keyword(s):

Atrial Fibrillation ◽

Chronic Kidney Disease ◽

Acute Kidney Injury ◽

Kidney Disease ◽

Coronary Angiography ◽

Kidney Injury ◽

Post Contrast ◽

Acute Kidney Disease ◽

Patients At Risk ◽

Kidney Impairment

Atrial fibrillation (AF) symptoms may mimic coronary artery disease (CAD) which reflects the difficulties in qualifying AF patients for invasive diagnostics. A substantial number of coronary angiographies may be unnecessary or even put patients at risk of post-contrast acute kidney injury (PC-AKI), especially patients with chronic kidney disease (CKD). We aimed to investigate the hypothesis indicating higher prevalence of PC-AKI in patients with AF scheduled for coronary angiography. The study population comprised of 8026 patients referred for elective coronarography including 1621 with AF. In the comparison of prevalence of PC-AKI in distinguished groups we can see that kidney impairment was twice more frequent in patients with AF in both groups with CKD (CKD (+)/AF (+) 6.24% vs. CKD (+)/AF (−) 3.04%) and without CKD (CKD (−)/AF (+) 2.32% vs. CKD (−)/AF (−) 1.22%). In our study, post-contrast acute kidney disease is twice more frequent in patients with AF, especially in subgroup with chronic kidney disease scheduled for coronary angiography. Additionally, having in mind results of previous studies stating that AF is associated with non-obstructive coronary lesions on angiography, patients with AF and CKD may be unnecessarily exposed to contrast agent and possible complications.

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Faculty Opinions recommendation of Post-contrast acute kidney injury. Part 2: risk stratification, role of hydration and other prophylactic measures, patients taking metformin and chronic dialysis patients : Recommendations for updated ESUR Contrast Medium Safety Committee guidelines.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.732691154.793560598 ◽

2019 ◽

Author(s):

Eric Hoste

Keyword(s):

Acute Kidney Injury ◽

Risk Stratification ◽

Contrast Medium ◽

Kidney Injury ◽

Chronic Dialysis ◽

Dialysis Patients ◽

Post Contrast ◽

Prophylactic Measures ◽

Safety Committee

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Oral Hydration as a Safe Prophylactic Measure To Prevent Post-Contrast Acute Kidney Injury in Oncologic Patients with Chronic Kidney Disease (IIIb) Referred for Contrast-Enhanced Computed Tomography: Subanalysis of The Oncological Group of The NICIR Study.

10.21203/rs.3.rs-729538/v1 ◽

2021 ◽

Author(s):

Carmen Sebastia ◽

Alfredo Páez-Carpio ◽

Elena Guillen ◽

Blanca Paño ◽

JoanAlbert Arnaiz ◽

...

Keyword(s):

Computed Tomography ◽

Chronic Kidney Disease ◽

Acute Kidney Injury ◽

Kidney Disease ◽

Kidney Injury ◽

Oral Hydration ◽

Post Contrast ◽

Contrast Enhanced ◽

Enhanced Computed Tomography ◽

Contrast Enhanced Computed Tomography

Abstract Background The objective of this study is to evaluate oral hydration compared to intravenous (i.v.) hydration in the prevention of post-contrast acute kidney injury (PC-AKI) in the oncologic subgroup of patients with stage IIIb chronic kidney disease (CKD) included in the NICIR study referred for elective contrast-enhanced computed tomography (CE-CT). Material and Methods We performed a retrospective subanalysis of the oncological subgroup (174/228 patients, 74%) from a continuous prospective database of patients included in the recently published non-inferiority NICIR study. Patients received prophylaxis against PC-AKI with either oral hydration (500 mL of water two hours before and 2000 mL during the 24 hours after CE-CT) or i.v. hydration (sodium bicarbonate (166 mmol/L)3 mL/kg/h starting one hour before and 1 mL/kg/h during the first hour after CE-CT). The primary outcome was to compare the proportion of PC-AKI in the first 48 to 72 hours after CE-CT in the two hydration groups. Secondary outcomes were to compare persistent PC-AKI, the need for hemodialysis, and the occurrence of adverse events related to prophylaxis in each group. Results Of 174 patients included in the subanalysis, 82 received oral hydration and 92 received i.v. hydration. There were no significant differences in clinical characteristics or risk factors between the two study arms. Overall the PC-AKI rate was 4.6% (8/174 patients), being 3.7% in the oral hydration arm (3/82 patients) and 5.4% (5/92 patients) in the i.v. hydration arm. The persistent PC-AKI rate was 1.8% (1/82 patients) in the oral hydration arm and 3.3% (3/92 patients) in the i.v. hydration arm. No patient required dialysis during the first month after CE-CT or had adverse effects related to the hydration regime. Conclusion In oncological patients with stage IIIb CKD referred for elective CE-CT, the rate of PC-AKI in those receiving oral hydration did not significantly differ from that of patients receiving i.v. hydration.

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