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Nevin Manimala Statistics

A new electrocardiographic evaluation in hyperkalemia: frontal QRS-T angle

Ir J Med Sci. 2025 Jun 21. doi: 10.1007/s11845-025-03988-3. Online ahead of print.

ABSTRACT

INTRODUCTION: ECG is a frequently used and easily accessible diagnostic tool used to evaluate cardiac involvement in hyperkalemia patients.

OBJECTIVE: The present study aimed to investigate the mortality prediction potential of the frontal QRS-T angle in hyperkalemia patients and the effects of the treatment process on this angle.

METHOD: The study was planned as a prospective study. A total of 121 hyperkalemia patients were included in the study. Conditions that caused high potassium were identified and the PR, QRS, QT, QTc, and frontal QRS-T angle were calculated and recorded from the 12-lead ECG recordings of the patients at the time of admission to the emergency room.

RESULTS: The mean age of the patients was 58.5 ± 9.2 years (median: 59), 63 (% 52.1) were female and 58 (% 47.9) were male. The second measurements of the ECG parameters PR, QTc, QRS, T-amplitude, T duration, and frontal QRS-T values were lower than the first measurements (p < 0.001; p = 0.007; p < 0.001; p < 0.001; p < 0.001; p = 0.006, respectively). The ability of the patient’s ECG parameters PR, QT, QTc, QRS, T-amplitude, frontal QRS-T angle, and frontal QRS-T (absolute value) to predict the development of mortality In the ROC Curve analysis, it was found that these parameters did not have a statistically significant effect in predicting mortality.

CONCLUSION: As well as known ECG findings, in cases of hyperkalemia, widening of the frontal QRS-T angle and correction of this widened angle in patients with normokalemia detected with treatment can be used as an important follow-up parameter.

PMID:40542911 | DOI:10.1007/s11845-025-03988-3

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Risk factors for the development of hydrocephalus in traumatic brain injury: a systematic review and meta-analysis

Neurosurg Rev. 2025 Jun 21;48(1):522. doi: 10.1007/s10143-025-03611-0.

ABSTRACT

Traumatic brain injury (TBI) is a significant public health issue, with 30% to 50% of patients developing post-traumatic hydrocephalus (PTH). This condition can elevate intracranial pressure, leading to headaches, vomiting, altered consciousness, and potentially coma or death, severely impacting quality of life. This study aims to systematically evaluate risk factors associated with PTH following TBI. The authors searched PubMed, Embase, Web of Science, and Cochrane Central Register of Controlled Trials for studies published from 2000 to 2024. Data extraction was standardized, and statistical analysis was performed using State 14.0 software. We assessed the risk of bias and compared patient characteristics, using fixed or random effects models to summarize PTH risk factors, calculating pooled odds ratios (OR) and 95% confidence intervals (CI). A total of 25 studies involving 1,383,328 TBI patients met the inclusion criteria. Significant factors associated with an increased risk of PTH included decompressive craniectomy (DC) (p < 0.001), intraventricular hemorrhage (IVH) (p = 0.016), lower Glasgow Coma Scale (GCS) scores (p < 0.001), subdural hematoma (p < 0.001), postoperative meningitis (p = 0.027), external ventricular drainage (EVD) (p < 0.001), traumatic subarachnoid hemorrhage (SAH) (p < 0.001), and epidural hematoma (p < 0.001). Age was not significantly correlated with PTH. Identifying these risk factors (DC, IVH, GCS, subdural hematoma, postoperative meningitis, external ventricular drainage, traumatic SAH, and epidural hematoma) highlights the importance of close monitoring in TBI patients. This approach aims to enable early identification of PTH and reduce its incidence, ultimately improving survival outcomes and long-term prognosis for TBI patients.

PMID:40542903 | DOI:10.1007/s10143-025-03611-0

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Size distribution of decaying foam bubbles

Eur Phys J E Soft Matter. 2025 Jun 21;48(6-7):33. doi: 10.1140/epje/s10189-025-00498-z.

ABSTRACT

The most studies on the stability of foam bubbles investigated the mechanical stability of thin films between bubbles due to the drainage by gravity. In the current work, we take an alternative approach by assuming the rupture of bubbles as a series of random events and by investigating the time evolution of the size distribution of foam bubbles over a long time up to several hours. For this purpose, we first prepared layers of bubbles on Petri dishes by shaking soap solutions of a few different concentrations, and then we monitored the Petri dishes by using a time-lapse video imaging technique. We analyzed the captured images by custom software to count the bubble size distribution with respect to the initial concentration and elapsed time. From the statistics on our data, we find that the total bubble volume decreases exponentially in time, and the exponent, i.e., the mean lifetime, is a function of the bubble size. The mean lifetimes of larger bubbles are observed to be shorter than those of smaller bubbles, by approximately a factor of 2.

PMID:40542902 | DOI:10.1140/epje/s10189-025-00498-z

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Phenotypic and genotypic characterization of biofilm-producing avian pathogenic Escherichia coli (APEC) isolates from Algerian poultry: associations between antimicrobial resistance and virulence genes

Vet Res Commun. 2025 Jun 21;49(4):232. doi: 10.1007/s11259-025-10801-0.

ABSTRACT

Avian colibacillosis, caused by avian pathogenic Escherichia coli (APEC), represents a major threat to the poultry industry, leading to significant economic losses. This study aimed to characterize selected biofilm-producing APEC strains isolated from diseased chickens in the Tizi-Ouzou region of Algeria and to explore potential associations between antimicrobial resistance and the presence of virulence factors. Twenty-four confirmed biofilm-producing E. coli isolates were analyzed for serotype distribution, antimicrobial resistance patterns and virulence gene profiles. While none belonged to the O157 serogroup, all isolates demonstrated concerning resistance profiles, with high rates observed for tetracycline (83.3%), ampicillin (75%), and ciprofloxacin (62.5%). Notably, 40% of the strains exhibited biofilm-forming capability, predominantly showing weak to moderate production levels.Virulence gene profiling revealed traT, bcsA, and csgA as nearly ubiquitous (95.8%), with fimH present in 83.3% of isolates. Intermediate prevalence was noted for iutA (62.5%), fliC (45.8%), and agn43 (33.3%), while fyuA (29.2%) and several other virulence markers (kpsMT II, papC, cnf1, ibeA) occurred at lower frequencies (< 10%). Statistical analysis identified significant correlations between virulence gene content and phenotypic characteristics, including a positive association between virulence gene number and biofilm intensity (p < 0.05). Moreover, the fimH gene showed a strong positive correlation with resistance to the antibiotic nalidixic acid. Resistance to β-lactam antibiotics (cefotaxime, cefepime, aztreonam) was positively correlated (p < 0.05) with papC and ibeA, but negatively correlated with csgA. These findings underscore the complex interplay between antimicrobial resistance and virulence in Algerian biofilm-producing APEC strains, highlighting the need for enhanced surveillance programs and tailored intervention strategies. This study provides critical baseline data for developing effective control measures against colibacillosis poultry production systems.

PMID:40542899 | DOI:10.1007/s11259-025-10801-0

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Incidence of spine-related diagnoses in Danish children: a nationwide registry-based study of hospital data

Eur J Pediatr. 2025 Jun 21;184(7):432. doi: 10.1007/s00431-025-06247-w.

ABSTRACT

This study investigated the annual incidence rates of spine-related hospital diagnoses in Danish children aged 0-17 years from 2009 to 2021. It aimed to assess trends stratified by diagnostic groups, hospital departments, and residential regions. A nationwide register-based cohort study was conducted using data from the Danish National Patient Register and census data. Spine-related diagnoses were identified through International Classification of Disease (ICD-10) codes and categorized into five groups: critical, whiplash, radiating, structural, and regional. Incidence rates (IR) per 100,000 children were calculated and stratified by diagnostic group, hospital department, and region. Temporal trends were visualized using descriptive statistics. The study identified 43,073 children with 78,304 spine-related diagnoses. The median age was 13 years with interquartile range of 5.3, and 55% were female. IRs remained stable over the 13-year period. Whiplash and structural diagnoses decreased after 2015, while regional diagnoses increased until stabilizing in 2019. Regional disparities were noted, with the capital region having higher IRs than other regions. Most diagnoses were managed within orthopedic departments.

CONCLUSION: This study highlights stable IRs of pediatric spine-related diagnoses despite significant changes in diagnostic practices, reflecting a potential shift toward a biopsychosocial approach in hospital care. Regional disparities and variability in diagnostic coding practices emphasize the need for standardized protocols and equitable care pathways. Further research could validate coding practices, investigate care trajectories, and explore long-term outcomes to optimize pediatric spine care.

WHAT IS KNOWN: • Pediatric spinal pain is increasingly reported in epidemiological surveys, with substantial health burden. • Hospital-based diagnostic patterns in children remain largely unexplored.

WHAT IS NEW: • This is the first national registry-based study of spine-related hospital diagnoses in Danish children. • Marked regional variation and changing departmental patterns suggest a need for standardization.

PMID:40542882 | DOI:10.1007/s00431-025-06247-w

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Post-traumatic hydrocephalus after decompressive craniectomy: a multidimensional analysis of clinical, radiological, and surgical risk factors

Neurosurg Rev. 2025 Jun 21;48(1):523. doi: 10.1007/s10143-025-03673-0.

ABSTRACT

Decompressive craniectomy is a key treatment for refractory intracranial pressure after severe traumatic brain injury (TBI). Post-traumatic hydrocephalus (PTH) occurs in 7.6-36% of cases, and early diagnosis significantly improves rehabilitation outcomes. This retrospective study analyzed risk factors for shunt-dependent PTH in 126 TBI patients (93 men, 33 women, median age 53 years). Patients were divided into those requiring shunts and those who did not. Clinical and radiological characteristics, including volumetric measurements and surgical techniques, were assessed using SPSS® Statistics 25. The incidence of shunt-dependent PTH was 27%. Multivariate analysis identified significant risk factors: advanced age at craniectomy (p = 0.008; OR 1.048), traumatic subarachnoid hemorrhage in the basal cisterns (p = 0.015; OR 7.545), post-traumatic ischemic infarcts (p = 0.003; OR 5.319), transcalvarial brain herniation (p = 0.012; OR 5.543), subdural hygroma (p = 0.004; OR 8.131), and progression of contusion hemorrhages (p = 0.013; OR 4.386). Operative parameters did not show statistical significance. Neurological outcomes in shunt patients, assessed via the modified Rankin Scale and Extended Glasgow Outcome Scale, were significantly worse than in non-shunt patients (mRS > 3, GOS-E < 5, p = 0.001-0.011). Our findings suggest that subarachnoid hemorrhage in the cisterns, advanced age, hygromas, ischemic infarcts, transcalvarial herniation, and contusion hemorrhage progression are independent risk factors for shunt-dependent PTH. Additionally, shunt placement was linked to poorer neurological outcomes.

PMID:40542880 | DOI:10.1007/s10143-025-03673-0

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Comparative utility of urethrosonography versus classic techniques in diagnosing urethral stricture: a single center study

Abdom Radiol (NY). 2025 Jun 21. doi: 10.1007/s00261-025-05054-z. Online ahead of print.

ABSTRACT

PURPOSE: To evaluate the utility and complications of urethrosonography (US) in the preoperative assessment of urethral stricture compared to traditional diagnostic methods and its impact on therapeutic decision-making.

METHODS: A prospective observational study was conducted on male patients diagnosed with urethral stricture who were candidates for surgical treatment. Preoperative assessment included flexible urethrocystoscopy, voiding cystourethrography (VCUG), and US. Demographic and epidemiological data were recorded and analyzed. Sensitivity and specificity were calculated. Agreement between diagnostic techniques was assessed using the Cohen’s Kappa coefficient. The impact of findings on surgical decision-making was evaluated, and potential complications associated with each technique were documented.

RESULTS: Thirty-three male patients with a mean age of 59.5 years, diagnosed with urethral stricture who were candidates for surgical treatment, were evaluated. No statistically significant differences were found in the location or severity of the stricture among the different techniques, with good concordance with intraoperative findings. US demonstrated higher sensitivity (60% vs. 44.2%) and specificity (87.8% vs. 84.9%) compared to VCUG in assessing the length of the stricture, and was also more accurate than urethrocystoscopy in determining the degree of spongiofibrosis (77.02% vs. 69.11% for sensitivity, and 81.9% vs. 74.5% for specificity). The choice of preoperative technique influenced the selection of the surgical approach.

CONCLUSIONS: Urethrosonography is more sensitive and specific than traditional techniques in determining the length of the stricture, with similar concordance with intraoperative findings. It may serve as an alternative to conventional diagnostic tests in the preoperative evaluation of urethral stricture, offering several advantages such as the absence of radiation, lower complication rates, and its non-invasive nature.

PMID:40542876 | DOI:10.1007/s00261-025-05054-z

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Exploring the influence and identifying key predictors of sleep difficulties on health status in long-term breast cancer survivors: a cross-sectional study

Support Care Cancer. 2025 Jun 21;33(7):609. doi: 10.1007/s00520-025-09673-6.

ABSTRACT

PURPOSE: This study analyzed the relationship between different levels of sleep difficulties and physical, mental, and emotional variables in long-term breast cancer survivors (LTBCSs), and identified predictors of sleep-related complaints.

METHODS: Eighty LTBCSs participated in this cross-sectional study. Sleep difficulties were assessed via item 11 of the EORTC QLQ-C30, classifying participants into two groups: low (n = 44; ≤ 26.29) and high sleep difficulties (n = 36; ≥ 26.30). Additional measures included the EORTC QLQ-BR23, Piper Fatigue Scale, Visual Analog Scale, Brief Pain Inventory, International Fitness Scale, Minnesota Leisure Time Physical Activity questionnaire, and the Scale for Mood Assessment. Statistical analyses comprised ANOVA, Mann-Whitney U, Chi-square, correlation, and multiple regression; effect sizes were calculated using Cohen’s d.

RESULTS: Fifty-five percent of LTBCSs reported higher sleep difficulties. This group showed greater physical, mental, and emotional impairments, including cancer-related fatigue (CRF), pain, lower self-perceived fitness, reduced physical activity (PA), worse mood, and diminished health-related quality of life (HRQoL) (all p < 0.05). Regression identified “role functioning” (β = -0.37; p < 0.01), “nausea and vomiting” (β = 0.37; p < 0.01), and “PA level” (β = -0.17; p = 0.02) as significant predictors of higher levels of sleep difficulties (adjusted r2 = 0.58).

CONCLUSION: Five or more years post-diagnosis, 55% of LTBCSs experienced higher sleep difficulties, associated with poorer HRQoL, self-perceived physical fitness, mood, and increased CRF and pain. Key predictors explained 58.4% of variance in sleep difficulties.

PMID:40542861 | DOI:10.1007/s00520-025-09673-6

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Comparative analysis of anterior chamber stability with a cohesive ophthalmic viscosurgical device versus the soft-shell technique

Graefes Arch Clin Exp Ophthalmol. 2025 Jun 21. doi: 10.1007/s00417-025-06867-w. Online ahead of print.

ABSTRACT

PURPOSE: To study the properties of different ophthalmic viscosurgical devices (OVD) in respect of their ability to create and maintain high intraocular pressure (IOP) during the creation of a continuous curvilinear capsulorhexis (CCC).

METHODS: In this randomized interventional study IOP was measured using rebound tonometry with sterilized probes immediately before the beginning of the CCC and immediately afterwards during cataract surgery. The study included 177 eyes in four groups using two different OVD – hyaluronic acid (HA) and a combination of HA and hydroxy propylmethylcellulosis (HPMC) according to the soft shell-technique (SST) – and two different instruments, Utrata forceps (UF) and 26 g cystotome (RN).

RESULTS: The drop in intraocular pressure (IOP) during capsulorhexis was measured at 57.0 ± 12.2 mmHg in eyes treated with HA (90) and 63.1 ± 13.4 mmHg in eyes treated with SS (87). The difference in IOP reduction between HA and SS did not reach statistical significance (p = 0.060).

CONCLUSIONS: The use of different OVD did not result in a significant difference in IOP drop. As the soft shell-technique has shown superiority in respect of endothelial protection, these results should encourage cataract surgeon to resort to the soft shell-technique more often if not use it as a standard technique.

PMID:40542859 | DOI:10.1007/s00417-025-06867-w

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Effect of catheter dwell time on the risk of central line-associated bloodstream infections in central venous catheters and peripherally inserted central catheters

Antimicrob Resist Infect Control. 2025 Jun 20;14(1):70. doi: 10.1186/s13756-025-01590-x.

ABSTRACT

BACKGROUND: Understanding the impact of catheter dwell time on the risk of central-line associated bloodstream infections (CLABSIs) is crucial to developing effective infection prevention strategies. The aim of the study was to evaluate the relationship between catheter dwell time and the risk of CLABSIs caused by multidrug-resistant and common pathogens in patients with central venous catheters (CVCs) and peripherally inserted central catheters (PICCs).

METHODS: We retrospectively analysed data from patients admitted consecutively to a tertiary care Greek hospital from 2018-2020. Events were categorized into three groups based on 10-days’ intervals: group 1 (≤ 10 days), group 2 (11-20 days), and group 3 (> 21 days).

RESULTS: Α total of 84 patients (mean age 56.4 ± 19.6 years) were included in the study. Among them, 62 (73.8%) had CVC, while 22 (26.2%) had PICC placement. In the CVC cohort, a statistically significant difference in CLABSI rates was observed, with rates of 4.49, 5.57, and 8.54 per 1,000 catheter/days for groups 1, 2, and 3 respectively (p < 0.001). Similarly, higher rates of MDROs were found in group 3, with rates of 2.93, 3.71, and 4.47 per 1,000 catheter/days for groups 1, 2, and 3, respectively (p = 0.01). Regarding the PICC cohort, significant differences in CLABSI rates were observed among the three groups, with rates of 0.93, 2.25, and 1.67 per 1,000 catheter/days for groups 1, 2, and 3, respectively (p < 0.001).

CONCLUSION: Our results emphasize the critical role of catheter selection and duration management in mitigating CLABSI risk, especially for patients with CVCs.

PMID:40542449 | DOI:10.1186/s13756-025-01590-x