Ivanka Maduna

Dr. Ivanka Maduna


Research Focus & Metrics

Academic Career Length

2Years (2025-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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20 May 2025 in Biomedicines
Verified
Journal Article
Open access
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VVVinković Vinković
Vinković Vinković
AKAndrijana Kopić
Andrijana Kopić
Tvrtka BenašićTvrtka Benašić
Tvrtka Benašić
DBDubravka Biuk
Dubravka Biuk
IMIvanka Maduna
Ivanka Maduna
SVStela Vujosevic
Stela Vujosevic
Purpose: To analyze the retinal and choriocapillaris changes in diabetic patients with no or with early signs of diabetic retinopathy using high-definition (HD) angio optical coherence tomography angiography (OCTA) software and spectral-domain (SD) OCT. Methods: A total of 112 eyes (54 eyes from 27 diabetic patients and 58 eyes from 29 control subjects) were included in this retrospective cross-sectional study of healthy and diabetic adults. Retinal microvascular changes were assessed by using HD-OCTA software to calculate vascular density (VD) and foveal avascular zone (FAZ). SD-OCT was used to assess retinal thickness and volume in parafovea as well as ganglion cell complex (GCC) parameters. Results: The VD-whole image was significantly higher in the healthy control group (MW z = 1109.5, p = 0.012; t = 2.611, p = 0.010). Also, VD-parafovea was significantly higher in the healthy subjects (MW z = 1053.5, p = 0.004; t = 3.207, p = 0.002). GCC focal loss volume (FLV) was significantly decreased in diabetic patients (p = 0.051). Non-flow FAZ did not show a statistically significant difference between groups, although the FAZ was larger in the diabetic patients. Conclusions: Diabetic patients with no or early signs of diabetic retinopathy have decreased VD compared to healthy individuals. They also present retinal changes at the GCC that are correlated with initial neurodegeneration. HD-OCTA and SD-OCT can detect vascular changes and structural signs of retinal neurodegeneration before clinically apparent diabetic retinopathy. Potentially, these methods may offer new biomarkers for monitoring disease progression and visual prognosis.

29 October 2026 in Journal of Clinical Medicine
Verified
Journal Article
Open access
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DBDunja Bajtl
Dunja Bajtl
VNVedran Nemet
Vedran Nemet
IMIvanka Maduna
Ivanka Maduna
Suzana MatićSuzana Matić
Suzana Matić
VVVinković Vinković
Vinković Vinković
Marija Jelić VukovićMarija Jelić Vuković
Marija Jelić Vuković
Background/Objectives: To describe the presentation, diagnostic evaluation, management, and clinical outcome of unilateral corneal ulcer in an otherwise healthy infant without identifiable predisposing factors. Methods: We report a case of a 2-month-old infant who presented with a visible white corneal lesion. Initial examination revealed a 2 × 1 mm fluorescein-positive corneal ulcer with a surrounding stromal infiltrate. There was mild conjunctival injection without ocular discharge. The anterior chamber was deep, without cells or flare. Corneal scraping was deferred because specimen collection would have required sedation or general anesthesia. Consequently, the microbial etiology remained unconfirmed, and empirical antimicrobial treatment was initiated. Results: The patient was treated with topical azithromycin, tobramycin, moxifloxacin, and aciclovir, as well as liposomal ozonized oil eye drops. During empirical treatment and close clinical monitoring, the corneal epithelial defect resolved within seven days, and the surrounding stromal infiltrate progressively decreased in size and opacity. At the one-month follow-up, a small residual stromal scar remained outside the visual axis. Conclusions: This case illustrates the diagnostic and therapeutic challenges of managing corneal ulcer in early infancy when microbiological confirmation is unavailable. The favorable clinical course observed during empirical treatment and close monitoring does not establish an infectious etiology or demonstrate a causal effect of antimicrobial therapy.

30 October 2026 in Healthcare
Verified
Journal Article
Open access
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Stipe VidovićStipe Vidović
Stipe Vidović
MOMarija Olujić
Marija Olujić
IMIvanka Maduna
Ivanka Maduna
DDDunja Degmečić
Dunja Degmečić
ESEleonora Suvaljko
Eleonora Suvaljko
DBDubravka Biuk
Dubravka Biuk
Background: Psychological outcomes among patients receiving anti-vascular endothelial growth factor (anti-VEGF) therapy for diabetic macular edema (DME) remain insufficiently investigated. This study assessed symptoms of depression, anxiety, and stress, as well as life satisfaction, in patients undergoing intravitreal anti-VEGF therapy for DME. Methods: This cross-sectional study included patients receiving intravitreal anti-VEGF therapy for DME at Clinical Hospital Centre Osijek, Croatia, from 15 December 2025 to 15 February 2026. Depression, anxiety, and stress symptoms were assessed using the Depression Anxiety Stress Scale-21 (DASS-21), and life satisfaction using the Satisfaction with Life Scale (SWLS). Best-corrected visual acuity (BCVA) was categorized as ≥0.5, 0.1–0.49, or <0.1. Multivariable linear regression models were adjusted for age, sex, and diabetes duration. Results: A total of 156 patients were included; 51.3% were male, and the median age was 71 years (IQR 64.75–76.25). Mild-to-extremely severe symptoms of depression, anxiety, and stress were present in 39.7%, 48.7%, and 28.8% of participants, respectively, while 37.2% reported some degree of life dissatisfaction. In adjusted analyses (N = 155), worse-seeing eye BCVA < 0.1 was associated with higher stress scores compared with BCVA ≥ 0.5 (B = 2.667, 95% CI 0.526–4.808, p = 0.015; standardized effect size = 0.583). Associations with depression and anxiety were not significant, and no BCVA associations remained significant after Benjamini–Hochberg correction. The number of intravitreal anti-VEGF injections was not significantly associated with the assessed psychological outcomes and life satisfaction in univariable analyses. Conclusions: These findings highlight the importance of assessing psychological symptoms and life satisfaction in patients receiving anti-VEGF therapy for DME. Further research should examine the associations of visual acuity, the number of anti-VEGF injections, and other clinical and psychosocial factors with these outcomes.

1 January 2026 in Journal of Clinical Medicine
Verified
Journal Article
Open access
PDF file
VJVera Jelušić
Vera Jelušić
IMIvanka Maduna
Ivanka Maduna
DBDubravka Biuk
Dubravka Biuk
ZDZdravka Krivdic Dupan
Zdravka Krivdic Dupan
JBJosip Barać
Josip Barać
JMjelena juri mandić
jelena juri mandić
Background/Objectives: Thyroid eye disease (TED) can lead to structural and microvascular changes in the orbit and retina. This study aimed to investigate the associations between Clinical Activity Score (CAS), orbital magnetic resonance imaging (MRI) measurements, and retinal microvascular changes in TED patients. Methods: This cross-sectional study included 38 patients (76 eyes) with TED. Each patient underwent a comprehensive ophthalmological evaluation, CAS assessment, and a detailed medical history. Optical coherence tomography angiography (OCTA) was performed to quantify vessel density (VD) in the superficial and deep capillary plexus (SCP and DCP). Exophthalmos, extraocular muscle thickness and orbital fat thickness were measured on MRI scans to evaluate structural changes. Laboratory analyses included thyroid hormone levels, thyrotropin receptor antibodies (TRAb), anti-thyroid peroxidase antibodies (anti-TPO), and lipid profile. Results: Active TED patients (CAS ≥ 3) had significantly higher TRAb levels (p < 0.001), while anti-TPO did not differ between groups. Active eyes showed significantly higher DCP VD in the whole image (p = 0.013), parafovea (p = 0.012), and perifovea (p = 0.009) across all quadrants, with no difference in SCP or the foveal avascular zone (FAZ). In linear mixed model regression analyses, after adjusting for previous glucocorticosteroid therapy, higher triglycerides, greater medial rectus thickness, and whole-image DCP VD independently predicted higher CAS values (R2 = 42, p < 0.001). After adjusting for age and sex, CAS remained significantly positive predictor of DCP VD in the parafovea (R2 = 0.22, p < 0.001). Conclusions: Changes in DCP VD reflect TED activity and structural orbital involvement.

6 November 2025 in Medicina
Verified
Journal Article
Open access
PDF file
Marija Jelić VukovićMarija Jelić Vuković
Marija Jelić Vuković
Suzana MatićSuzana Matić
Suzana Matić
DBDubravka Biuk
Dubravka Biuk
MKMiro Kalauz
Miro Kalauz
AKAndrijana Kopić
Andrijana Kopić
Ena KolakEna Kolak
Ena Kolak
Background and Objectives: Corneal ulcers in patients with lagophthalmos due to facial nerve palsy pose a significant therapeutic challenge. Topical insulin has emerged as a promising adjuvant therapy for enhancing corneal re-epithelialization. The aim of this study is to evaluate the efficacy of insulin drops compared with lipid-based artificial tears, and to compare the corneal healing rate in achieving complete epithelialization within 30 days in diabetic patients. Materials and Methods: This retrospective case–control study included 32 patients with facial nerve palsy and lagophthalmos who developed an exposed corneal ulcer, of whom 20 received topical insulin and 12 received lipid-based artificial tears. The primary outcome was complete epithelialization at day 30. Additional variables included age, sex, and baseline defect characteristics. Results: By day 30, complete epithelialization was achieved in 18 of 20 patients (90%) in the insulin group compared with 5 of 12 (41.7%) in the control group. Binary logistic regression analysis confirmed significantly higher odds of healing with insulin treatment (OR = 10.8; 95% CI 1.8–63.9). No systemic adverse events or signs of hypoglycemia were observed. Conclusions: Topical insulin significantly accelerates corneal epithelialization in patients with facial nerve palsy and exposed ulcers, offering safe and effective adjuvant therapy for a high-risk population. Despite promising results, the study’s limitations—including small sample size, single-center design, and retrospective nature—highlight the need for larger, multicenter prospective studies to confirm efficacy, optimize dosing, and further evaluate long-term safety.

24 July 2025 in Medicines
Verified
Journal Article
Open access
PDF file
IMIvanka Maduna
Ivanka Maduna
DGDorotea Gotler
Dorotea Gotler
PCPetra Crnac
Petra Crnac
Christian SalehChristian Saleh
Christian Saleh
HBHrvoje Budincevic
Hrvoje Budincevic
Background/Objectives: Atrial fibrillation (AF) is the most significant modifying risk factor for the development of cardioembolic stroke, which is associated with worse outcomes and higher intrahospital mortality compared to other types of ischemic stroke. Antithrombotic medications are administered as prophylactic treatment in patients with a risk of stroke. The aim of this study was to determine outcome measures in patients with first-ever ischemic stroke and AF regarding prior antithrombotic therapy. Methods: We collected data on stroke risk factors, CHADS2 score, and international normalized ratio (INR) value in the context of warfarin therapy, as well as data related to localization, stroke severity, and functional outcome at discharge. Results: A total of 754 subjects with first-ever ischemic stroke and AF were included in this cross-sectional study (122 on warfarin, 210 on acetylsalicylic acid, and 422 without prior antithrombotic therapy). The diagnosis of AF was previously unknown in 31% of the subjects. Stroke risk factors (arterial hypertension, hyperlipidemia, diabetes mellitus, and cardiomyopathy) were significantly lower in the group without prior antithrombotic therapy. The anticoagulant group was significantly younger (p = 0.001). Overall, 45.4% of subjects with a previously known AF event and a high risk of developing stroke received anticoagulant therapy. Participants on warfarin had a significantly better functional outcome than those on antiplatelet therapy or without prior antithrombotic therapy (median mRS 4 vs. 5 vs. 5; p = 0.025) and lower NIHSS scores, although the difference was not statistically significant (median 10 vs. 12 vs. 12; p = 0.09). There was no difference between stroke localization among groups (p = 0.116). Conclusions: Our study showed that, in our cohort, first-ever ischemic stroke due to AF was more common in women. Subjects on prior anticoagulant therapy had more favorable outcomes at discharge.