Nazan VANLI TONYALI

Dr. Nazan VANLI TONYALI

orcid

Research Focus & Metrics

Academic Career Length

6Years (2021-Present)

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

Representative Publications

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30 August 2024 in BMC Pregnancy and Childbirth
Verified
Journal Article
Open access
PDF file
GKGULSAN KARABAY
GULSAN KARABAY
BBBurak Bayraktar
Burak Bayraktar
ZSZeynep Seyhanli
Zeynep Seyhanli
BÇBetül Tokgöz Çakır
Betül Tokgöz Çakır
GAgizem aktemur
gizem aktemur
GDGulsah Dagdeviren
Gulsah Dagdeviren
Our study aimed to investigate the value of inflammatory indices in predicting the latency period until birth in patients with preterm premature rupture of membranes (PPROM). This retrospective study was conducted on PPROM cases between 24 and 34 weeks of gestation at Ankara Etlik City Hospital Perinatology Department from October 2023 to April 2024. A total of 146 participants were divided into two groups: Group 1 included 73 patients who gave birth within 72 hours (h) of PPROM diagnosis, and Group 2 included 73 patients who gave birth after 72 h. This study evaluated the prognostic significance of various inflammatory markers neutrophil/lymphocyte ratio (NLR), platelet/lymphocyte ratio (PLR), monocyte/lymphocyte ratio (MLR), systemic immune inflammation index (SII), systemic inflammatory response index (SIRI), pan-immune inflammation value (PIV), immature granulocytes (IG), multi-inflammatory index (MII)-1, MII-2, and MII-3 in predicting the latency period in patients with PPROM. Only MII-1, MII-2, and MII-3 reliably predicted labor within 72 h. The cut-off value for MII-1 was > 48.3, with a sensitivity of 57.7% and specificity of 57.3% (AUC: 0.598, 95% CI: 0.503–0.692, p = 0.042). For MII-2, the cut-off was > 1037.6, with a sensitivity of 57.7% and specificity of 57.3% (AUC: 0.611, 95% CI: 0.516–0.705, p = 0.021). MII-3 had a cut-off of > 10919.9, with a sensitivity of 53.5% and specificity of 52% (AUC: 0.595, 95% CI: 0.501–0.690, p = 0.046). Our findings show that, among NLR, PLR, MLR, SII, SIRI, PIV, IG, MII-1, MII-2, and MII-3, only MII-1, MII-2, and MII-3 levels are statistically significant in predicting birth timing.

17 January 2025 in American Journal of Reproductive Immunology
Verified
Journal Article
Closed access
GAgizem aktemur
gizem aktemur
BÇBetül Tokgöz Çakır
Betül Tokgöz Çakır
GKGULSAN KARABAY
GULSAN KARABAY
AFAhmet Arif FİLİZ
Ahmet Arif FİLİZ
ZSZeynep Seyhanlı
Zeynep Seyhanlı
ŞÇŞevki Çelen
Şevki Çelen

1 December 2021 in Journal of Obstetrics and Gynaecology Research
Verified
Journal Article
Closed access
PDF file
Hasan ErogluHasan Eroglu
Hasan Eroglu
NUNihal Şahin Uysal
Nihal Şahin Uysal
KSKemal Sarsmaz
Kemal Sarsmaz
NTNazan VANLI TONYALI
Nazan VANLI TONYALI
BCBahadır Codal
Bahadır Codal
AYAykan Yücel
Aykan Yücel

7 October 2024 in BMC Pregnancy and Childbirth
Verified
Journal Article
Open access
PDF file
NTNazan VANLI TONYALI
Nazan VANLI TONYALI
KSKemal Sarsmaz
Kemal Sarsmaz
BBBurak Bayraktar
Burak Bayraktar
NKNeval Çayönü Kahraman
Neval Çayönü Kahraman
SSSerap Topkara Sucu
Serap Topkara Sucu
YEYaprak Engin-Üstün
Yaprak Engin-Üstün
This study investigates the role of Delta Neutrophil Index (DNI), an inflammation marker, in late-onset fetal growth restriction (LO-FGR) and its prediction of composite adverse neonatal outcomes. A retrospective study was conducted on 684 pregnant women (456 with normal fetal development and 228 with LO-FGR) who delivered at Health Sciences University Etlik Zubeyde Hanim Women’s Health Training and Research Hospital between January 1, 2015, and June 30, 2018. Composite adverse neonatal outcomes were defined as at least one of the following: 5th minute APGAR score < 7, respiratory distress syndrome (RDS), or neonatal intensive care unit (NICU) admission. The FGR group had significantly higher levels of neutrophil to lymphocyte ratio (NLR), platelet to lymphocyte ratio (PLR), monocyte to lymphocyte ratio (MLR), and DNI compared to controls (p < 0.05, for all). For FGR diagnosis, the DNI demonstrated the highest area under the curve (AUC = 0.677, 95% CI: 0.642–0.711) with a cut-off value of > -2.9, yielding a sensitivity of 78.41%, a specificity of 52.97%, a positive likelihood ratio (+ LR) of 1.68, and a negative likelihood ratio (-LR) of 0.37 (p < 0.001). For predicting composite adverse neonatal outcomes in the FGR group, DNI again demonstrated superior performance with an AUC of 0.635 (95% CI: 0.598–0.670), a cut-off value of > -2.2, a sensitivity of 69.90%, a specificity of 55.36%, a + LR of 1.56, and a -LR of 0.51 (p < 0.001). NLR, PLR, and MLR had AUCs below 0.55, indicating poor discriminative ability, with none reaching statistical significance. This study highlights the potential role of DNI as a promising biomarker for detecting inflammatory processes associated with LO-FGR and its complications.

20 January 2025 in Journal of Clinical Medicine
Verified
Journal Article
Open access
PDF file
GKGULSAN KARABAY
GULSAN KARABAY
BBBurak Bayraktar
Burak Bayraktar
ZSZeynep Seyhanli
Zeynep Seyhanli
AFAhmet Arif FİLİZ
Ahmet Arif FİLİZ
BÇBetül Tokgöz Çakır
Betül Tokgöz Çakır
KYKadriye YAKUT YÜCEL
Kadriye YAKUT YÜCEL
Background: The aim of this study was to examine the relationship between conventional and novel Doppler parameters, including cerebroplacental ratio (CPR), cerebral–placental–uterine ratio (CPUR), umbilical-to-cerebral ratio (UCR), and amniotic-to-umbilical-cerebral ratio (AUCR), with the diagnosis of preeclampsia (PE) and adverse neonatal outcomes in PE cases. Methods: This prospective case-control study was conducted at the Ankara Etlik City Hospital Perinatology Clinic between November 2023 and May 2024. The study population was divided into two groups: Group 1, consisting of 74 patients diagnosed with preeclampsia, and Group 2, consisting of 80 healthy control patients. Composite adverse perinatal outcomes (CANOs) include presence of at least one adverse outcome: 5th-minute APGAR score < 7, transient tachypnea of the newborn (TTN), respiratory distress syndrome (RDS), need for continuous positive airway pressure (CPAP), need for mechanical ventilation, neonatal intensive care unit (NICU) admission, neonatal hypoglycemia, need for phototherapy, intraventricular hemorrhage (IVH), and neonatal sepsis. Results: The CPR, CPUR, and AUCR were significantly lower in the PE group compared to the control group, while the UCR was notably higher in the PE group. Among the combined ratios, the CPUR exhibited the highest diagnostic performance for both PE diagnosis and the prediction of CANOs. Additionally, while the UCR, CPR, and AUCR were significant for PE diagnosis, only AUCR demonstrated a significant association with the prediction of CANOs. Conclusions: Combined Doppler parameters, especially CPUR and AUCR, offer valuable insights into diagnosing PE and predicting CANOs. CPUR demonstrated the highest diagnostic accuracy, underscoring its potential utility in clinical settings.

12 July 2025 in BMC Pregnancy and Childbirth
Verified
Journal Article
Open access
PDF file
RDRuken Dayanan
Ruken Dayanan
BBBurak Bayraktar
Burak Bayraktar
GKGULSAN KARABAY
GULSAN KARABAY
AFAhmet Arif FİLİZ
Ahmet Arif FİLİZ
NTNazan VANLI TONYALI
Nazan VANLI TONYALI
SCSevki Celen
Sevki Celen
To evaluate the prognostic value of albumin-associated inflammatory indices in predicting delivery latency in pregnancies complicated by preterm premature rupture of membranes (PPROM). This retrospective study included a cohort of singleton pregnancies diagnosed with PPROM between 24 and 34 weeks of gestation. Inflammatory indices calculated at admission included leukocyte-to-albumin ratio (LAR), neutrophil-to-albumin ratio (NAR), monocyte-to-albumin ratio (MAR), fibrinogen-to-albumin ratio (FAR), systemic immune-inflammation index to albumin ratio (SII/Alb), systemic inflammation response index to albumin ratio (SIRI/Alb), neutrophil percentage-to-albumin ratio (NPAR), and C-reactive protein-to-albumin ratio (CAR). Latency periods were categorized as ≤ 48 hours (h), 72 h, 96 h, and 7 days. Receiver operating characteristic (ROC) analyses were performed to assess predictive performance. This retrospective study evaluated 311 PPROM cases managed at a tertiary center between January 2023 and December 2023. Among the evaluated indices, LAR, NAR, and FAR demonstrated consistent and statistically significant associations with shorter latency periods across all predefined intervals (≤ 48 h, 72 h, 96 h, and 7 days). FAR exhibited the strongest predictive performance for delivery within 48 h (AUC: 0.637), followed by NAR and LAR. NPAR and CAR showed moderate predictive value at 72 h and 96 h (AUCs ~ 0.566–0.603), and NPAR remained significant at the 7-day mark (AUC: 0.605). SII/Alb was predictive at 72 and 96 h (AUCs: 0.584 and 0.616, respectively), while SIRI/Alb reached significance only at 96 h (AUC: 0.574). MAR did not demonstrate predictive value at any time point. Albumin-associated inflammatory indices—particularly LAR, NAR, and FAR—are promising, cost-effective markers for identifying PPROM patients at risk for imminent delivery. These easily accessible laboratory parameters may support individualized management strategies. Further prospective studies are warranted to validate these findings and explore their role in clinical decision-making.