Browse publications by year: 2025

  1. Paramasivan T, Md Amin R, Zhao S, Wang T, Roseli N, Li D, et al.
    Environ Sci Pollut Res Int, 2025 Jan;32(2):587-602.
    PMID: 39695036 DOI: 10.1007/s11356-024-35711-7
    Estuarine fronts are formed due to sharp density discontinuities resulting from the convergence of different water masses. This study, conducted in May and August of 2022 during the southwest monsoon season, focuses on assessing the role of estuarine fronts at Kuala Terengganu estuary in the accumulation of microplastics in surface seawater. The Terengganu River basin area covers approximately 4600 km2 and consists of two main tributaries that drain into the Kuala Terengganu estuary. Microplastic samples were collected from three areas, the plume, front, and shelf, utilizing two methods: manta net (> 350 µm) and bucket-water sampling (> 20 µm). Results indicate that the estuarine front consistently exhibited higher microplastic concentrations than the plume and shelf regions throughout the study period, with bucket-water sampling contributing significantly to the abundance. Specifically, peak concentrations occurred during the ebb tide at the frontal region in both months, reaching 5761.703 particles m-3 and 12,687.437 particles m-3, respectively. The microplastics, predominantly transparent fibers smaller than 1000 µm, mostly showed signs of oxidative and mechanical weathering through SEM-EDS analysis, providing insights into their fate in estuarine surface waters. FTIR spectroscopy revealed polypropylene, polyethylene, and polyamide as the dominant polymers. These findings establish a baseline for microplastic abundance at the estuarine front of the Kuala Terengganu estuary and may inform future strategies for mitigating and recovering microplastic contamination in aquatic environments.
    MeSH terms: Environmental Monitoring*; Seawater/chemistry; Rivers/chemistry; Estuaries*
  2. Guo D, Sun J, Feng S
    J Sports Med Phys Fitness, 2025 Jan;65(1):132-139.
    PMID: 39287582 DOI: 10.23736/S0022-4707.24.16206-8
    BACKGROUND: Non-alcoholic fatty liver disease (NAFLD), linked to sedentary lifestyles and metabolic dysfunction, is highly prevalent. Exercise is an established intervention, but the relative efficacy of different exercise modalities remains unclear. The aim of this study was to compare the effects of moderate-intensity continuous aerobic training and High-Intensity Interval Training (HIIT) on physical fitness, biochemical parameters, and liver function in NAFLD patients.

    METHODS: Sixty NAFLD patients (32 males, 28 females; age: 49.7±8.7 years; BMI: 31.1±3.3 kg/m2) were randomized into HIIT, aerobic training, and control cohorts. The HIIT cohort performed 4-minute high-intensity intervals at 85-95% of peak heart rate, interspersed with 3-minute active recovery at 60-70% of peak heart rate for 30-40 minutes per session. The aerobic training cohort performed continuous exercise at 60-70% of peak heart rate for 45-60 minutes per session. Both intervention cohorts underwent 12 weeks of supervised training, thrice weekly. Before and after the intervention, assessments included cardiorespiratory fitness, muscular strength, flexibility, lipid profile, liver enzymes, inflammatory markers, insulin sensitivity, and oxidative stress markers.

    RESULTS: Compared to controls, both exercise cohorts showed significant improvements in cardiorespiratory fitness, muscular strength, and flexibility. However, HIIT elicited superior enhancements in cardiorespiratory fitness and muscular strength. Biochemically, both exercise cohorts exhibited reductions in triglycerides, low-density lipoprotein (LDL) cholesterol, liver enzymes (alanine aminotransferase [ALT], aspartate aminotransferase [AST]), inflammatory markers (C-reactive protein [CRP], interleukin-6 [IL-6]), insulin resistance (homeostatic model assessment of insulin resistance [HOMA-IR]), and oxidative stress markers (malondialdehyde [MDA], protein carbonyl). Notably, HIIT yielded more substantial improvements in these parameters.

    CONCLUSIONS: HIIT and traditional aerobic training are effective in improving physical fitness and ameliorating biochemical indicators in NAFLD patients. Notably, HIIT appears to be more advantageous in enhancing cardiorespiratory fitness, muscular strength, and metabolic, inflammatory, and oxidative stress profiles, suggesting its potential as a time-efficient and effective exercise modality for managing NAFLD.

    MeSH terms: Adult; Alanine Transaminase/blood; C-Reactive Protein/metabolism; Exercise Therapy/methods; Female; Heart Rate/physiology; Humans; Insulin Resistance; Lipids/blood; Male; Middle Aged; Physical Fitness/physiology; Biomarkers/blood; Exercise/physiology; Oxidative Stress; Muscle Strength/physiology; Cardiorespiratory Fitness/physiology; High-Intensity Interval Training*
  3. Wood B, Robinson E, McCoy D, Baker P, Sacks G
    Matern Child Nutr, 2025 Jan;21(1):e13721.
    PMID: 39344750 DOI: 10.1111/mcn.13721
    The International Code of Marketing of Breast-milk Substitutes and subsequent resolutions (the Code) was adopted to address increases in mortality and morbidity resulting from the practices of the breast-milk substitute (BMS) industry. The lack of success in ensuring company compliance with the Code has prompted advocates to consider engaging with investors to shape the governance of BMS companies. To support these efforts, this paper aimed to identify prominent investors in the global BMS industry and explore their Code-related policies and practices. Using multiple methods and data sources, we developed a novel approach to identify and rank investors in the world's leading publicly listed BMS companies. We also examined the policies and voting behaviour of a sample of investors using publicly accessible materials from 2020 to 2022. We found that a small number of large investors, led by BlackRock and Vanguard, hold a substantial share in the global BMS industry. Of the top-10 ranked investors, only Norway's Government Pension Fund (NBIM) reported policy information relating specifically to BMS marketing. Most of these large investors also opposed the sample of public health-related shareholder proposals analysed. In addition, we identified several investors that have reported engaging with BMS companies on Code-related issues, including NBIM, Pictet, and UBS, along with several potential investor targets for future advocacy efforts, including some North American public pension funds. The inclusion of Code-related issues as part of broader policies, disclosures and regulations related to environmental, social and governance oriented investment warrants increased attention.
    MeSH terms: Humans; Investments; Global Health; Marketing/methods; Milk Substitutes*
  4. Nabila FH, Islam R, Yamin L, Yoshirou K, Wakabayashi R, Kamiya N, et al.
    ACS Biomater Sci Eng, 2025 Jan 13;11(1):402-414.
    PMID: 39686755 DOI: 10.1021/acsbiomaterials.4c02000
    Transdermal insulin delivery is a promising method for diabetes management, providing the potential for controlled, sustained release and prolonged insulin effectiveness. However, the large molecular weight of insulin hinders its passive absorption through the stratum corneum (SC) of the skin, and high doses of insulin are required, which limits the commercial viability. We developed ethosome (ET) and trans-ethosome (TET) nanovesicle formulations containing a biocompatible lipid-based ionic liquid, [EDMPC][Lin], dissolved in 35% ethanol. TET formulations were obtained by adding isopropyl myristate (IPM), Tween-80, or Span-20 as surfactants to ET formulations. Dynamic light scattering, ζ-potential, transmission electron microscopy, and confocal laser scanning microscopy studies revealed that the nanovesicles had a stable particle size. The formulations remained stable at 4 °C for more than 3 months. ET and TET formulations containing IPM (TET1) significantly (p < 0.0001) enhanced the transdermal penetration of FITC-tagged insulin (FITC-Ins) in both mouse and pig skin, compared with that of the control FITC-Ins solution and other TET formulations, by altering the molecular structure of the SC layer. These nanovesicles were found to be biocompatible and nonirritants (cell viability >80%) in the in vitro and in vivo studies on three-dimensional (3D) artificial human skin and a diabetic mouse model, respectively. The ET and TET1 formulations were applied to the skin of diabetic mice at an insulin dosage of 30 IU/kg. The nanovesicle formulations significantly reduced blood glucose levels (BGLs) compared with the initial high BGL value (>150 mg/dL). The nanovesicle-treated mice maintained low BGLs for over 15 h, as opposed to only 2 h in the injection group. The ET and TET1 formulations reduced the BGLs by 62 and 34%, respectively, of the initial value. These ET and TET1 formulations have a high potential for use in commercial transdermal insulin patches, enhancing comfort and adherence in diabetes treatment.
    MeSH terms: Administration, Cutaneous*; Animals; Diabetes Mellitus, Experimental/drug therapy; Humans; Hypoglycemic Agents/administration & dosage; Hypoglycemic Agents/pharmacokinetics; Hypoglycemic Agents/therapeutic use; Hypoglycemic Agents/chemistry; Male; Skin/drug effects; Skin/metabolism; Skin Absorption/drug effects; Swine; Drug Delivery Systems; Mice; Nanoparticles/chemistry
  5. Cai Z, Zhou S, Zhang T, Du Q, Tu M, Wu Z, et al.
    Food Chem, 2025 Mar 15;468:142447.
    PMID: 39689487 DOI: 10.1016/j.foodchem.2024.142447
    Lactiplantibacillus plantarum NUC08, a novel probiotic strain, has demonstrated potential for synergistic fermentation with starter cultures. This study investigates its functional properties in fermented milk and examines how mulberry fruit extract (MFE), rich in bioactive compounds, may influence its fermentation performance. MFE significantly boosted LAB growth, improved texture and rheological properties, and enhanced antioxidant capacity in the probiotic yogurt. GC-MS analysis revealed that MFE enriched the flavor profile by increasing key flavor-related metabolites, contributing to superior sensory qualities. Furthermore, the combination of L. plantarum NUC08 and MFE led to distinct shifts in metabolic pathways, as shown by LC-MS analysis, amplifying the regulatory effects on antioxidant activity. These findings demonstrate the synergy between MFE and L. plantarum NUC08, where MFE enhances the growth and functionality of L. plantarum NUC08, improving the yogurt's physicochemical properties, antioxidant capacity, and flavor, with potential for functional dairy product development.
    MeSH terms: Animals; Fermentation*; Flavoring Agents/metabolism; Flavoring Agents/chemistry; Humans; Milk/microbiology; Milk/chemistry; Taste; Probiotics*; Lactobacillus plantarum/metabolism; Lactobacillus plantarum/chemistry
  6. Ng KH, Fong CY, Kamarudzaman MFS, Lo WH, Khalid F, Chong LA
    Brain Dev, 2025 Feb;47(1):104308.
    PMID: 39675180 DOI: 10.1016/j.braindev.2024.104308
    OBJECTIVES: Children with cerebral palsy (CP) can experience a substantial amount of pain. Effective pain management hinges on precise and prompt assessment. We designed a mobile-based application NeuroPAIN app to monitor pain among children with CP. NeuroPAIN app allowed parents to record pain symptoms, pain duration, and rate the perceived pain their child was facing. We evaluated the usefulness of NeuroPAIN app in pain recognition and monitoring among Malaysian parents of children with bilateral CP.

    METHOD: Prospective cohort study of all parents of children with bilateral non-ambulant CP who owned Android devices. NeuroPAIN app was installed in all participants. At 3-month follow-up, data of the NeuroPAIN app was analyzed and participants were given a feedback questionnaire to complete.

    RESULTS: Total of 60 parents participated in the study (child's median age 7 years, interquartile range 4-8.75 years). The vast majority (95 %) of parents reported pain in their children. Children with assisted tube feeding was associated with reported increased pain frequency. Majority (77 %) felt it was easy to navigate the NeuroPAIN app. Two-thirds regularly tracked their child's pain using the app over a 2-month period. Parents of children with prolonged periods of pain ≥25 s were associated with reduced app usage.

    CONCLUSION: Majority of Malaysian children with bilateral CP often experience pain particularly among those with assisted tube feeding highlighting the importance for clinicians to be vigilant in monitoring pain among these children. Prolonged pain periods among children with CP may lead to parental fatigue in monitoring pain through the NeuoPAIN app.

    MeSH terms: Child; Child, Preschool; Female; Humans; Malaysia; Male; Pain/diagnosis; Pain Measurement/methods; Parents; Prospective Studies; Surveys and Questionnaires; Mobile Applications*
  7. Iqbal MA, Younis MW, Maqbool M, Goh HH, Kurniawan TA, Amjad M, et al.
    Int J Biol Macromol, 2025 Feb;288:138775.
    PMID: 39675599 DOI: 10.1016/j.ijbiomac.2024.138775
    In this study, we present a groundbreaking approach utilizing metal-free, visible light-mediated organic photoredox catalyzed atom transfer radical polymerization (O-ATRP) to synthesize cellulose-based stimuli-responsive polymers. Our method resulted in the successful synthesis of innovative metal-free poly(N-tertiary-butylacrylamide)-graft-hydroxypropyl cellulose (PNTBAM-g-HPC) polymers with exceptional control over molecular weight and narrow dispersity index (Đ) and explored their applications in organo-photocatalytic reactions. This approach addresses the limitations of traditional atom transfer radical polymerization method, which suffer from metal contamination and toxicity related problems. O-ATRP and organic photoredox catalysts have been sought to address these difficult challenges. In this study, we synthesized organic compound; 2,4,5,6-tetrakis(diphenylamino)isophthalonitrile (4DPIPN), which served as an organic photoredox catalyst, enabling the synthesis and application study of PNTBAM-g-HPC polymers via organic photoredox catalysis. Furthermore, by employing 4DPIPN, three different types of PNTBAM-g-HPC polymers were synthesized. Through thorough characterization techniques including FTIR, NMR, UV/Visible spectroscopy, TGA, and GPC analysis, we confirmed the successful synthesis of photocatalyst and three different types of PNTBAM-g-HPC polymers under O-ATRP conditions. By adjusting the molar ratios of PNTBAM side chains, we fine-tuned the LCST of HTA-20 polymers to 37.3 °C, demonstrating their thermoresponsive behavior. This synthetic approach shows great potential for applications in biosensors, pharmaceuticals, biomedical engineering, and drug delivery systems.
    MeSH terms: Acrylamides/chemistry; Catalysis; Light; Oxidation-Reduction*; Polymers/chemical synthesis; Polymers/chemistry; Temperature; Photochemical Processes; Polymerization*
  8. Dou X, Saalah S, Chiam CK, Xie J, Sipaut CS
    J Mater Chem B, 2025 Jan 22;13(4):1180-1194.
    PMID: 39679535 DOI: 10.1039/d4tb02207f
    Ultrasmall metal nanoclusters (NCs, <2 nm) have emerged as a novel class of luminescent probes due to their atomically precise size and tailored physicochemical properties. The rapid advancements in the design and utilization of metal NC-based luminescent probes are facilitated by the atomic-level manipulation of metal NCs. This review article explores (i) the engineering of metal NCs' functions for bioimaging applications, and (ii) the diverse uses of metal NCs in bioimaging. We begin by presenting an overview of the engineering functions of metal NCs as luminescent probes for bioimaging applications, highlighting key strategies for enhancing NCs' luminescence, biocompatibility and targeting capabilities towards biological specimens. Our discussion then centers on the bioimaging applications of metal NCs in subcellular organelles, individual cells, tissues, and entire organs. Finally, we offer a perspective on the challenges and potential developments in the future use of metal NCs for bioimaging applications.
    MeSH terms: Animals; Fluorescent Dyes/chemical synthesis; Fluorescent Dyes/chemistry; Humans; Particle Size; Luminescent Agents/chemical synthesis; Luminescent Agents/chemistry; Optical Imaging
  9. Cai R, Tan CP, Lai OM, Dang Y, Liu A, Choeng LZ, et al.
    Food Chem, 2025 Mar 15;468:142408.
    PMID: 39674013 DOI: 10.1016/j.foodchem.2024.142408
    Casein (CN) is a common allergen that is challenging to avoid in modern foods. The effect of cold argon plasma (CAP) on reducing CN antigenicity was investigated, focusing on alterations in epitope structure and sequence. CAP mainly contains hydroxyl radicals (∙OH). After a 12-min CAP treatment, the result of ELISA demonstrated an 80.46 % reduction in antigenicity. Transmission electron microscopy and electrophoresis revealed that certain CN aggregated, while multispectral analysis indicated that part of CN was fragmented into smaller peptides. The predictive 3D model suggested the disruption of linear epitopes located in the α-helix region might contribute to the reduced allergenicity. The peptide sequences were compared to the linear epitopes predicted by immunoinformatics approaches, revealing some reduction or breakage of key allergic sequences. Meanwhile, amino acids with aromatic side chains and hydrophobic groups were susceptible to CAP-induced modifications. This investigation demonstrated CAP could be beneficial for processing hypoallergenic foods.
    MeSH terms: Amino Acid Sequence; Animals; Epitopes/immunology; Epitopes/chemistry; Food Hypersensitivity/immunology; Humans; Peptides/immunology; Peptides/chemistry
  10. Khalid AA, Abd Razak NI, Anuar ST, Ibrahim YS, Rusli MU, Jaafar M
    Mar Pollut Bull, 2025 Feb;211:117412.
    PMID: 39674038 DOI: 10.1016/j.marpolbul.2024.117412
    This study presents the first evidence of microplastics in natural sea turtle nests at Chagar Hutang Turtle Sanctuary (CHTS) on Redang Island, a crucial habitat for green turtles. Microplastics were detected in all studied turtle nests (0-70 cm depth), with a total abundance of 12,270 microplastic items per kg dry weight of sand. Fibers (80.7 %) were the most prevalent shape, primarily black (37.9 %), with a high proportion of small-sized particles (<300-1000 μm), indicating prolonged accumulation and environmental degradation. These microplastics, primarily polyethylene terephthalate (PET) and polyethylene (PE), are likely from fishing nets, food packaging, and textiles. Despite the sanctuary's remote location, it is heavily impacted by microplastics carried by tides and wind, raising concerns about their potential effects on turtle egg incubation. The findings offer critical insights into the impact of microplastics on turtle habitats and underscore the urgent need for conservation efforts to protect green sea turtles in Malaysia.
    MeSH terms: Animals; Environmental Monitoring*; Malaysia; Turtles*; Ecosystem; Islands
  11. Wang J, Chang B
    Acta Psychol (Amst), 2025 Feb;252:104668.
    PMID: 39674078 DOI: 10.1016/j.actpsy.2024.104668
    Using Latent Profile Analysis, this study explored the connections between different marginalization profiles and perceptions of decent work among rural primary school teachers in China. Analyzing data from 443 teachers across seven rural primary schools in Fujian Province, we discerned three unique marginalization profiles: Robust Adapters (n = 182, 41 %), Challenge Facers (n = 210, 47 %), and Conditioned Survivors (n = 51, 12 %). These profiles were examined for their links to decent work dimensions. Findings indicated that the Robust Adapters significantly outperformed both the Challenge Facers and Conditioned Survivors across all five dimensions of decent work. In contrast, there were no significant differences between the performances of the Challenge Facers and Conditioned Survivors in these dimensions, which indicated that more marginalization was not inevitably linked to less decent work. The study concluded by discussing the implications of these findings and the directions of future research.
    MeSH terms: Adult; China; Female; Humans; Male; Middle Aged; Social Marginalization
  12. Benhadji N, Kurniawan SB, Imron MF
    Sci Total Environ, 2025 Jan 01;958:178057.
    PMID: 39674161 DOI: 10.1016/j.scitotenv.2024.178057
    Heavy metal and microplastic pollutions are prevalent in freshwater ecosystems, with many freshwater bodies being contaminated by one or both of these pollutants. Recent studies reported extreme detections of Cd, Pb and Zn, high concentrations of Cr, Pb and Cu and microplastics acting as vectors of pollutants, including heavy metals. Mayflies can serve as bioindicators of heavy metal contamination in freshwater ecosystems because changes in their community structure, physiology, and behaviour can reflect and help predict the concentrations of metals in these environments. This review discusses the ecological alterations induced by tissue metal concentration in mayflies and other macroinvertebrates. As sensitive taxa to heavy metal contamination, mayflies can reflect the impacts of this pollution through their ethology and relationship to the substrate, highlighting issues such as eutrophication, alterations in community structure, inhibitory effects and sediment toxicity. Mayflies are also highly affected by microplastic exposure, which leads to ingestion, bioaccumulation, biomagnification, habitat and community alteration, behavioural changes, physiology alteration and toxicity. Mayflies bioindication metrics for assessing the impact of heavy metals and microplastics include the examination of community alteration, functional feeding behaviour, molecular structure, dietary and toxicity impacts, bioaccumulation and biomagnification and biomarkers. Current challenges for the utilization of mayflies as bioindicators include temporal variations in sensitivity, lack of universally recognised protocols and need for standardised protocols for microplastic analysis. Additionally, the applicability of mayflies as bioindicators may vary across different ecosystems, emphasising the need for selecting suitable indicators that align with the unique characteristics of the ecosystem.
    MeSH terms: Animals; Water Pollutants, Chemical*; Ecosystem; Ephemeroptera*
  13. Gries JJ, Lazarus JV, Brennan PN, Siddiqui MS, Targher G, Lang CC, et al.
    Lancet Gastroenterol Hepatol, 2025 Jan;10(1):82-94.
    PMID: 39674228 DOI: 10.1016/S2468-1253(24)00310-8
    Metabolic dysfunction-associated steatotic liver disease (MASLD) has emerged as a public health threat as it affects approximately 38% of the adult population worldwide, with its prevalence rising in step with that of obesity and type 2 diabetes. Beyond the implications of MASLD for liver health, it is also associated with cardiovascular and vascular dysfunction. Although the many shared risk factors and common metabolic milieu might indicate that cardiovascular disease and MASLD are discrete outcomes from common systemic pathogeneses, a growing body of evidence has identified a potential causal relationship between MASLD and coronary artery disease, which is the leading cause of morbidity and mortality in people with MASLD and all-cause mortality worldwide. This Review takes an interdisciplinary approach, drawing on hepatology, cardiology, endocrinology, and metabolic and internal medicine specialists to help to delineate the intricate interplay between MASLD and coronary artery disease. It sheds light on novel opportunities for targeted interventions and personalised management strategies.
    MeSH terms: Fatty Liver/complications; Fatty Liver/metabolism; Fatty Liver/therapy; Humans; Risk Factors; Non-alcoholic Fatty Liver Disease/complications; Non-alcoholic Fatty Liver Disease/metabolism; Non-alcoholic Fatty Liver Disease/therapy
  14. Suhaimi A, Jawad AH, Yusoff MZM, Wilson LD, ALOthman ZA
    Int J Biol Macromol, 2025 Feb;288:138650.
    PMID: 39674466 DOI: 10.1016/j.ijbiomac.2024.138650
    A bio-composite material was developed that contains chitosan, food-grade algae, and zeolite for the removal of brilliant green (BG) dye. The synthesized bio-composite was dried via two different methods (air-drying; AD, and freeze-drying; FD). The physicochemical characterization of air-dried chitosan-algae-zeolite (Cs-Alg-Zl-AD) and freeze-dried chitosan-algae-zeolite (Cs-Alg-Zl-FD) were investigated by spectroscopy (FTIR, SEM-EDX, and XPS), diffraction (XRD), surface charge via pHpzc, specific surface area (SSA) and elemental analyses. The utilization of Box-Behnken Design (BBD) was intended to optimize the three input variables, which are adsorbent dosage, pH of medium, and contact time. The adsorption optimization process yielded optimal conditions, which were verified through a desirability test and implemented in batch-mode equilibrium experiments. The Cs-Alg-Zl-FD has a higher specific surface area (SSA = 3.29 m2/g) compared to Cs-Alg-Zl-AD (SSA = 1.79 m2/g). The Cs-Alg-Zl-FD shows greater adsorptive removal of BG (98.6 %) over Cs-Alg-Zl-AD (88.6 %), in parallel agreement with differences in the SSA. Moreover, the maximum BG dye adsorption capacities of Cs-Alg-Zl-FD (119.5 mg/g) and Cs-Alg-Zl-AD (108 mg/g) at pH = 8.1 and 25 °C. The Freundlich model fits best with Cs-Alg-Zl-AD while Langmuir and Temkin models account for the Cs-Alg-Zl-FD dye adsorption. The Cs-Alg-Zl-FD shows greater dye adsorption over four adsorption cycles, as compared with the Cs-Alg-Zl-AD.
    MeSH terms: Adsorption; Quaternary Ammonium Compounds; Coloring Agents/isolation & purification; Coloring Agents/chemistry; Freeze Drying*; Hydrogen-Ion Concentration; Kinetics; Water Purification/methods
  15. Yunesh K, Adlan ASA, Wong TY, Gan F, Hamdan M, Tan PC
    Am J Obstet Gynecol MFM, 2025 Feb;7(2):101579.
    PMID: 39674509 DOI: 10.1016/j.ajogmf.2024.101579
    BACKGROUND: Induction of labor after 1 previous cesarean delivery with an unripe cervix have an especially high risk for unplanned cesarean delivery and uterine rupture. Mechanical balloon ripening is often preferred over prostaglandin-based ripening during induction of labor after 1 previous cesarean delivery, because uterine rupture has been associated with prostaglandin use. The transcervical Foley balloon can be dislodged past the ripened cervix and be retained comfortably in the vagina during passive placement. Tugging of the Foley catheter can be a noninvasive and tolerated method for timelier retrieval of the retained balloon; expediting discovery of a ripened cervix would permit an earlier follow-on amniotomy and oxytocin infusion, thereby hastening birth.

    OBJECTIVE: This study aimed to evaluate the effect of tugging of the Foley balloon for 30 seconds every 3 hours during 12 hours of scheduled placement in comparison with standard care (no tugging) on the induction to birth interval and patient satisfaction.

    STUDY DESIGN: This randomized controlled trial, conducted at a university hospital in Malaysia, recruited participants from April 2023 to March 2024. Eligible participants admitted for Foley balloon induction of labor who had 1 previous cesarean were recruited. After balloon insertion, participants were randomized to tugging or standard care. Following balloon displacement, a vaginal examination was performed to check the cervix. The examination findings then dictated the follow-on management of induction of labor after 1 previous cesarean according to standard practice. The primary outcomes were the induction (Foley insertion) to delivery interval and participants' satisfaction with the birthing process. Secondary outcomes were largely derived from the core outcome set for trials on induction of labor. Based on a superiority hypothesis, it was calculated that a sample size of 126 would be required to detect a 4-hour reduction in the induction-to-delivery interval and a 1.5 point increase in the satisfaction score based on a 0 to 10 numerical rating scale with the level of significance set at 0.05, power at 80%, and a 10% drop out rate. Comparative analyses using an intention-to-treat approach were conducted using t tests, Mann-Whitney U tests, chi square tests, and Fisher exact tests as appropriate.

    RESULTS: A total of 126 participants were randomized with 63 in each trial arm. The induction to birth interval was (mean ± standard deviation) 29.7±9.6 hours for those in the 3-hourly tugging group and 29.8±9.1 hours for those under standard care (P=.950), and maternal satisfaction with the induction of labor after 1 previous cesarean delivery birth process, assessed using a 0 to 10 numerical rating scale, was (median [interquartile range]) 8 [7-9] and 8 [7-9] (P=.936), respectively. The cesarean delivery rate was 37 of 63 (59%) vs 41 of 63 (65%) (P=.238) for those in the tugging group vs standard care, and the main indication for unplanned cesarean delivery was failure to progress with an incidence of 24 of 37 (65%) and 24 of 41 (59%) (P=.914) for tugging vs standard care arms, respectively. Three-hourly tugging also did not shorten the interval from induction to balloon displacement, amniotomy, the start of oxytocin infusion, or the second stage of labor.

    CONCLUSION: Tugging the catheter every 3 hours during scheduled 12-hour Foley balloon placement for induction of labor after 1 previous cesarean delivery did not hasten birth or improve patient satisfaction when compared with standard care.

    MeSH terms: Adult; Catheterization/methods; Cesarean Section/methods; Cesarean Section/statistics & numerical data; Female; Humans; Malaysia; Pregnancy; Time Factors; Urinary Catheterization/methods; Patient Satisfaction*
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