Arvydas +37069871761 Martinkenas

Prof. Arvydas +37069871761 Martinkenas

orcid

Research Focus & Metrics

Academic Career Length

9Years (2018-Present)

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

Representative Publications

View All Publications
9 August 2018 in BMC Surgery
Verified
Journal Article
Open access
PDF file
VEVitalijus Eismontas
Vitalijus Eismontas
ASAlgirdas Slepavicius
Algirdas Slepavicius
VJVinsas Janusonis
Vinsas Janusonis
PZPaulius Zeromskas
Paulius Zeromskas
VBVirgilijus Beisa
Virgilijus Beisa
AMArvydas +37069871761 Martinkenas
Arvydas +37069871761 Martinkenas
Thyroid surgeries are among the most common operations performed in the world. Hypocalcemia following total thyroidectomy is a common complication that is sometimes difficult to correct. The aim of this study is to determine the risk factors for hypocalcemia following total thyroidectomy and their clinical value. From January 2015 through to April 2017, 400 patients were included in this prospective multicenter study. All patients underwent total thyroidectomy due to various thyroid diseases. The following risk factors were analyzed: pre-operative and post-operative biochemical blood parameters, clinical effects and factors related to surgery, the patient, and the disease. Post-operative hypocalcemia developed in 257 patients (64.2%). Of them, 197 patients (76.7%) were diagnosed with asymptomatic hypocalcemia. Clinical symptoms were present in 60 of the 257 patients with hypocalcemia (23.3%). The statistically significant predictors of hypocalcemia were decreased calcium and ionized calcium pre-operatively (p < 0.001), parathyroid hormone on day one following surgery (p < 0.001), thyrotoxicosis <10 years before surgery (odds ratio 1.65, 95% CI 1.01–2.70, p = 0.046), the number of parathyroid glands found during surgery (odds ratio 0.52, 95% CI 0.38–0.70, p < 0.001), ligation of the trunk of the left inferior thyroid artery (odds ratio 2.04, 95% CI 1.27–3.29, p = 0.003), ligation of the trunk of the right inferior thyroid artery (odds ratio 2.37, 95% CI 1.47–3.81, p < 0.001), and the number of transplanted parathyroid glands (odds ratio 1.87, 95% CI 1.12–2.97, p = 0.015). In the multivariate analysis, age (odds ratio 1.05, 95% CI 1.01–1.09, p = 0.029) and gender (odds ratio 5.94, 95% CI 1.13–31.26, p = 0.035) were statistically significant predictors. This study demonstrates that there is a number of different patient (gender, age, and duration of thyrotoxicosis <10 years before surgery) and surgical (number of parathyroid glands found during surgery, decreased calcium and ionized calcium before surgery, parathyroid hormone on day one following surgery, and ligation of the trunk of the left and right inferior thyroid artery) risk factors predictive of hypocalcemia following total thyroidectomy. Optimization of the surgical technique could possibly prevent the occurrence of hypocalcemia after total thyroidectomy in some cases; in other cases, identification of known risk factors post-operatively could permit early detection and effective treatment of these patients.

25 June 2018 in Nutrients
Verified
Journal Article
Open access
PDF file
CACésar Agostinis-Sobrinho
César Agostinis-Sobrinho
Rute SantosRute Santos
Rute Santos
Rafaela RosárioRafaela Rosário
Rafaela Rosário
CMCarla Moreira
Carla Moreira
Luis LopesLuis Lopes
Luis Lopes
Robinson Ramírez-VélezRobinson Ramírez-Vélez
Robinson Ramírez-Vélez
To examine the combined association of cardiorespiratory fitness (CRF), muscular fitness (MF), and adherence to a Mediterranean diet (MeDiet) on cardiovascular risk in adolescents, a pooled study, including cross-sectional data from two projects [2477 adolescents (1320 girls) aged 12–18 years], was completed. A shuttle run test was used to assess CRF. MF was assessed by the standing-long jump and handgrip tests. Adherence to a MeDiet was assessed by the Kidmed questionnaire. A cardiovascular risk score was computed from the following components: Age and sex, waist circumference, triglycerides, systolic blood pressure, high-density lipoprotein cholesterol (HDL), and glucose. Analysis of covariance showed that participants classified as having optimal (High) adherence to a MeDiet/HighMF/HighCRF, as well those classified as low adherence to a MeDiet/HighMF/HighCRF, had, on average, the lowest cardiovascular risk score (F = 15.6; p < 0.001). In addition, the high adherence to a MeDiet/LowMF/LowCRF group had the highest odds of having a high cardiovascular risk (OR = 7.1; 95% CI: 3.4–15.1; p < 0.001), followed by the low adherence to a MeDiet/LowMF/LowCRF group (OR = 3.7; 95% CI: 2.2–6.3; p < 0.001), high adherence to a MeDiet/HighMF/LowCRF group (OR = 3.1; 95% CI: 1.4–7.0; p = 0.006), and low adherence to a MeDiet/LowMF/HighCRF group (OR = 2.5; 95% CI: 1.5–4.4; p = 0.002) when compared to those with high adherence to a MeDiet/HighMF/HighCRF, after adjustments for potential confounders. In conclusion, our findings showed that, regardless of the MeDiet status, adolescents with low MF and low CRF cumulatively, presented the highest cardiovascular disease risk. Therefore, these findings suggest that the combination of these two fitness components may be beneficial to adolescents’ cardiometabolic profile, independent of MeDiet behaviour.

7 February 2025 in Brain Sciences
Verified
Journal Article
Open access
PDF file
Lolita RapolienėLolita Rapolienė
Lolita Rapolienė
DRDovydas Rapolis
Dovydas Rapolis
ASAelita Skarbaliene
Aelita Skarbaliene
GTGiedrė Taletavičienė
Giedrė Taletavičienė
Antonella FioravantiAntonella Fioravanti
Antonella Fioravanti
AMArvydas +37069871761 Martinkenas
Arvydas +37069871761 Martinkenas
Background: In our modern era, stress has become a pervasive challenge, affecting individuals across all ages and backgrounds. Acute or chronic stress and elevated cortisol levels are known to impair neurological function and hinder rehabilitation outcomes. Therefore, effective treatment methods that reduce stress, enhance mental health, and promote overall well-being are urgently needed. The aim of this study was to evaluate the seasonal impact of balneotherapy on distress, as measured by the General Symptoms Distress Scale (GSDS), and well-being, as assessed using the Arizona Integrative Outcomes Scale (AIOS), and the effect of winter balneotherapy on salivary cortisol levels. Methods: In 2023, a multicenter, single-blind, parallel-group, randomized controlled trial was carried out across six medical spa centers in Lithuania. Participants with a stress intensity greater than 3 points on the Visual Analogue Scale (VAS) underwent combined natural resource-based therapies over a 1- to 2-week treatment period. Outcomes were assessed using the General Symptom Distress and Arizona Integrative Outcomes scales, along with salivary cortisol measurements after winter intervention. Results: The results demonstrated a significant reduction in distress intensity by 1–3.5 points (VAS), with winter interventions showing greater efficacy compared to summer. Participants also experienced an increase in well-being by up to 3 points (VAS), improved stress management by up to 1.9 points (VAS), and a reduction in salivary cortisol levels by 0.9 units following winter-based treatments. Some gender differences emerged in specific groups. Conclusions: Our study provides robust evidence for the stress-reducing effects of balneotherapy, particularly highlighting the enhanced efficacy of winter interventions. These findings are especially relevant for neurological rehabilitation, where stress reduction and improved autonomic regulation can support neuroplasticity, recovery processes, and overall quality of life. This research offers valuable insights for developing holistic, seasonally optimized strategies to aid stress management and promote neurological health.

23 July 2023 in Applied Sciences
Verified
Journal Article
Open access
PDF file
DDDarius Drungilas
Darius Drungilas
MKMindaugas Kurmis
Mindaugas Kurmis
ATArtūras Tadžijevas
Artūras Tadžijevas
ZLZydrunas Lukosius
Zydrunas Lukosius
DŠDeivydas Šapalas
Deivydas Šapalas
JGJurate Gruode
Jurate Gruode
This paper presents a prototype of a disinfection system for public transport specifically aiming to disinfect surfaces contaminated with the SARS-CoV-2 virus on buses using 222 nm wavelength far-ultraviolet light (far-UVC). Our study involved testing the developed technical system installed in a 12 m long M3 category urban bus, an investigation of optimal far-UVC light angles, and the determination of disinfection parameters for bus seat disinfection. The study identified the ideal positioning of a light source for effective disinfection and analyzed three disinfection scenarios, considering zone coverage, disinfection time, and energy demand. A subsystem employing real-time occupancy monitoring enhances the disinfection process in crowded areas of buses. An energy efficiency assessment model is proposed for optimizing energy consumption. Furthermore, the energy consumption analyses in different disinfection scenarios provide valuable insights for optimizing energy usage in public transport disinfection.

24 March 2023 in Applied Sciences
Verified
Journal Article
Open access
PDF file
DDDarius Drungilas
Darius Drungilas
MKMindaugas Kurmis
Mindaugas Kurmis
ATArtūras Tadžijevas
Artūras Tadžijevas
ZLZydrunas Lukosius
Zydrunas Lukosius
AMArvydas +37069871761 Martinkenas
Arvydas +37069871761 Martinkenas
VJValdas Jankunas
Valdas Jankunas
The use of 222 nm far-UVC radiation can be an effective means of disinfecting public buses against viruses, including SARS-CoV-2. However, it can cause degradation of the mechanical and visual properties of interior materials. The purpose of this study is to investigate the effects of 222 nm far-UVC radiation on the color and mechanical degradation of materials used to construct public bus interiors. This research work involves exposure of samples of materials commonly used in bus interiors to various levels of far-UVC radiation and measuring and evaluating changes in color and mechanical properties. The results of the study showed that far-UVC irradiation causes significant color degradation (∆E00 >5) in all the polymeric materials tested, after 290 J/cm2 radiant exposure. In addition, significant changes in mechanical properties were observed when evaluating elasticity modulus, elongation at ultimate strength, elongation at break, and tensile strength. A particularly large decrease in elongation at break (up to 26%) was observed in fiber-reinforced composite materials. The results of this study can be used as a guide for the development of protocols for the use of far-UVC disinfection in public transportation, which can help limit the transmission of infections while preserving the integrity and visual properties of bus interior materials.

7 June 2025 in International Journal of Biometeorology
Verified
Journal Article
Closed access
PDF file
Lolita RapolienėLolita Rapolienė
Lolita Rapolienė
GTGiedrė Taletavičienė
Giedrė Taletavičienė
ABArvydas Balčius
Arvydas Balčius
AMArvydas +37069871761 Martinkenas
Arvydas +37069871761 Martinkenas
VKVytė Kontautienė
Vytė Kontautienė
Antonella FioravantiAntonella Fioravanti
Antonella Fioravanti