Modeling the influence of bacteria concentration on the mechanical properties of self-healing concrete (SHC) for sustainable bio-concrete structures.

In this research paper, the intelligent learning abilities of the gray wolf optimization (GWO), multi-verse optimization (MVO), moth fly optimization, particle swarm optimization (PSO), and whale optimization algorithm (WOA) metaheuristic techniques and the response surface methodology (RSM) has been studied in the prediction of the mechanical properties of self-healing concrete. Bio-concrete technology stimulated by the concentration of bacteria has been utilized as a sustainable structural concrete for the future of the built environment. This is due to the recovery tendency of the concrete structures after noticeable structural failures. However, it requires a somewhat expensive exercise and technology to create the medium for the growth of the bacteria needed for this self-healing ability. The method of data gathering, analysis and intelligent prediction has been adopted to propose parametric relationships between the bacteria usage and the concrete performance in terms of strength and durability. This makes is cheaper to design self-healing concrete structures based on the optimized mathematical relationships and models proposed from this exercise. The performance of the models was tested by using the coefficient of determination (R2), root mean squared errors, mean absolute errors, mean squared errors, variance accounted for and the coefficient of error. At the end of the prediction protocol and model performance evaluation, it was found that the classified metaheuristic techniques outclassed the RSM due their ability to mimic human and animal genetics of mutation. Furthermore, it can be finally remarked that the GWO outclassed the other methods in predicting the concrete slump (Sl) with R2 of 0.998 and 0.989 for the train and test, respectively, the PSO outclassed the rest in predicting the flexural strength with R2 of 0.989 and 0.937 for train and test, respectively and the MVO outclassed the others in predicting the compressive strength with R2 of 0.998 and 0.958 for train and test, respectively.

Homogenized and Lyophilized Amniotic Membrane Dressings for the Treatment of Diabetic Foot Ulcers in Ambulatory Patients.

BACKGROUND: Diabetic foot ulcers (DFUs) constitute a complication that occurs in 19% to 34% of patients with diabetes mellitus (DM). The aim of this study is to describe median days to healing, average velocity of wound closure, and percentage of wound surface closed at 3, 6, and 12 weeks through the use of homogenized and lyophilized amniotic membrane (hAMpe) dressings for the treatment of DFUs in ambulatory patients. METHODS: An observational, descriptive, longitudinal study was performed. Patients presenting with granulation-based DFU, after proper debridement, were included from August 19, 2021, until July 14, 2023. hAMpe dressings placed every 3 days were used for the treatment of these ulcers. RESULTS: Sixteen patients were included with a mean age of 52.38 (8.07) years. The analyzed lesions were postsurgical ulcers in 15 of the 16 included patients. Median ulcer size was 19.5 cm2 (6.12-36). The median ABI was 1.10 (1-1.14). The median days to healing was 96 (71-170). The median percentage closure of the wound at 3 weeks was 41% (28.9%-55.3%), at 6 weeks it was 68.2% (48.6%-74.2%), and at 12 weeks it was 100% (81%-100%). The average velocity closure was 1.04% per day (95% CI 0.71%-1.31%). It was higher during the closure of the first 50% of the ulcer, 2.12% per day (95% CI 0.16%-4.09%), and decreased from 50% to 25% of the ulcer size to 0.67% per day (95% CI 0.23%-1.10%) and from 25% to closure to 0.47% per day (95% CI 0.14%-0.80%), P < .001. CONCLUSION: These results are difficult to compare to other studies given the higher surface area of the ulcers included in our sample. The development of hAMpe dressings enables patients to apply them without requiring assistance from health care teams and was not associated with any recognized complications. LEVEL OF EVIDENCE: Level IV, case series.

Plantar Thermography in High-Risk Patients With Diabetes Mellitus Compared to Nondiabetic Individuals.

Diabetic foot (DF) is one of the most devastating complications of diabetes mellitus (DM). Infrared thermography has been studied for its potential in early diagnosis and preventive measures against DF ulcers, although its role in the management and prevention of DF complications remains uncertain. The objective of this study was to determine the average temperatures of different points of the plantar foot using infrared thermography in patients with DM and history of DF (DFa group, at the highest risk of developing foot ulcers) and compare them to people without DM (NoDM group). One hundred and twenty-three feet were included, 63 of them belonged to DFa Group and the other 60 to NoDM Group. The average temperature in the NoDM Group was 27.4 (26.3-28.5) versus 28.6 (26.8-30.3) in the DFa Group (p = .002). There were differences between both groups in temperatures at the metatarsal heads and heels, but not in the arch. Average foot temperatures did not relate to sex, ankle-brachial index, and age, and had a mild correlation with daily temperature (Spearman 0.51, p < .001). Data provided in our study could be useful in establishing a parameter of normal temperatures for high-risk patients. This could serve as a foundational framework for future research and provide reference values, not only for preventative purposes, as commonly addressed in most studies, but also to assess the applicability of thermography in clinical scenarios particularly when one foot cannot serve as a reference, suspected osteomyelitis of the remaining bone, or instances of increased temperature in specific areas which may necessitate adjustments to the insoles in secondary prevention.

Repercusión de la pandemia por SARS-COV-2 sobre las consultas en los Servicios de Emergencia Pediátrica en Uruguay / Consequences of the SARS-COV-2 pandemic on Pediatric Emergency Services in Uruguay / Repercussão da pandemia de SARS-COV-2 nas consultas nos Serviços de Emergência Pediátrica do Uruguai

En marzo de 2020 se confirma el primer caso de enfermedad por coronavirus en Uruguay, recomendándose un confinamiento social. La atención sanitaria se redujo a servicios de urgencia y emergencia (SE). Objetivo: analizar las características de las consultas pediátricas en los SE del subsector público y privado en Uruguay, durante los primeros 4 meses de la pandemia por SARS-CoV-2. Metodología: estudio descriptivo, retrospectivo, multicéntrico. Resultados: participaron 23 SE de todas las regiones del país. Período 1 prepandemia: 14/03/19-29.07.19, período 2: 14/03/20-29/07/20 Consultas: período 1 n=121.116, período 2 n=33.099 (desciende 73%). Hospitalizaciones desde el SE: período 1 n= .6649 (tasa 5,5%). Período 2: n=2.948 (tasa 9,5%). Diagnósticos período 1: infección respiratoria aguda (IRA) alta 39.892 (33%), IRA baja 86.56 (7%), trauma menor 8.651 (7%), gastroenteritis 8.044 (6,6%), crisis asmática/CBO 7.974 (6,5%), lesiones 4.389 (3,6%), dolor abdominal 3.528 (3%), problemas de salud mental 859 (0,7%), convulsiones 758 (0,7%), patología social 678 (0,5%). Diagnósticos 2020: IRA alta 5.168 (16%), trauma menor 2.759 (8%), lesiones 2.652 (8%), dolor abdominal 1.494 (4,5%), gastroenteritis 1.296 (4%), asma/CBO 1.095 (3,3%), IRA baja 700 (2,1%), patología social 522 (1,6%), problemas de salud mental 471 (1,4%), convulsiones 408 (1,2%). Conclusiones: en los primeros meses de la pandemia hubo una reducción sostenida y significativo de consultas pediátricas en los SE. No hubo aumento en frecuencia absoluta de ninguno de los diagnósticos. Se registró un descenso histórico de las IRA bajas y las hospitalizaciones por esta causa en todo el país. Mantener una vigilancia de las consultas en los SE permitiría identificar e intervenir oportunamente si se produjeran cambios o situaciones de riesgo hasta el momento no detectadas.

In March 2020 the first case of coronavirus disease was confirmed in Uruguay, and lockdown was recommended. Health care services were reduced to Urgency and Emergency Services (ES). Objectives: to analyze the epidemiological characteristics of pediatric visits to the ES of the public and private subsector in Uruguay, during the first 4 months of the SARS-CoV-2 pandemic. Methods: descriptive, retrospective. Results: 23 institutions participated. 2 periods were considered: 1) pre-pandemic, 03/14/19 to 07/29/19, 2) 03/14/20 to 07/29/20. Visits: period 1: n=121,116 (< 15 years), period 2: n=33.099 (73% decrease). Hospital admissions: period 1: n=6,649 (rate 5.5). Period 2: n=2.948 (rate 9,5). Diagnoses period 1: High acute respiratory infection 39,892 (33%), low acute respiratory infection 8,656 (7%), minor trauma 8,651 (7%), gastroenteritis 8,044 (6,6%), asthmatic crisis/CBO 7.974 (6,5%), injuries 4,389 (3,6%), abdominal pain (3,528) 3%, mental health problems 859 (0.7%), seizures 758 (0.7%), social pathology 678 (0.5% ). 2020 diagnoses: high acute respiratory infection 5.168 (16%), minor trauma 2,759 (8%), injuries 2,652 (8%), abdominal pain 1,494 (4.5%), gastroenteritis 1,296 (4%), asthma/CBO 1,095 (3,3%), low acute respiratory infection 700 (2,1%), social pathology 522 (1,6%), mental health problems 471 (1,4%), seizures 408 (1,2%). Conclusions: in the first months of the pandemic there was a sustained and significant reduction in pediatric consultations in ES. There was no increase in absolute frequency of any of the diagnoses. There was a historical decrease in low respiratory infections and hospitalizations due to this cause in the whole country. Maintaining a surveillance of the visits in the ES would enable practitioners to identify and take action in case of changes or previously undetected risk situations.

Em março de 2020, foi confirmado o primeiro caso de doença por coronavírus no Uruguai, recomendando o confinamento. A assistência à saúde foi reduzida a serviços de urgência e emergência (SE). Objetivo: analisar as características das consultas pediátricas no SE do subsetor público e privado no Uruguai, durante os primeiros 4 meses da pandemia de SARS-CoV-2. Metodologia: estudo descritivo, retrospectivo, multicêntrico. Resultados: participaram 23 SEs de todas as regiões do país. Período pré-pandemia 1: 14/03/19-29/07/19, período 2: 14/03/20-29/07/20 Consultas: período 1 n=121.116, período 2 n=33.099 (redução de 73%) . Internações da SE: período 1 n= 0,6649 (taxa 5,5%). Período 2: n=2.948 (taxa de 9,5%). Diagnósticos do período 1: infecção respiratória aguda alta (IRA) 39.892 (33%), LRA baixa 86,56 (7%), trauma menor 8.651 (7%), gastroenterite 8.044 (6,6%), crise asmática/CBO 7.974 (6, 5% ), lesões 4.389 (3,6%), dor abdominal 3.528 (3%), problemas de saúde mental 859 (0,7%), convulsões 758 (0,7%), patologia social 678 (0,5%). Diagnósticos 2020: IRA alta 5.168 (16%), trauma leve 2.759 (8%), lesões 2.652 (8%), dor abdominal 1.494 (4,5%), gastroenterite 1.296 (4%), asma/CBO 1.095 (3, 3%), IRA baixa 700 (2,1%), patologia social 522 (1,6%), problemas de saúde mental 471 (1,4%), convulsões 408 (1,2%). Conclusões: nos primeiros meses da pandemia houve uma redução sustentada e significativa das consultas pediátricas no SE. Não houve aumento na frequência absoluta de nenhum dos diagnósticos. Foi registrado um decréscimo histórico de IRAs baixas e internações por essa causa em todo o país. A manutenção de uma vigilância das consultas no SE permitiria identificar e intervir atempadamente nos casos de alterações ou situações de risco que até agora não tinham sido detectadas.

High mortality in patients with influenza A pH1N1 2009 admitted to a pediatric intensive care unit: a predictive model of mortality.

OBJECTIVE: To describe the clinical characteristics and outcome of patients admitted to pediatric intensive care with influenza A (pH1N1) 2009 in Argentina. DESIGN: Retrospective observational study. SETTING: Thirteen pediatric intensive care units in Argentina. SUBJECTS: One hundred and forty-two patients with confirmed or suspected influenza A (H1N1). INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: We included 142 critically ill patients. The median age was 19 months (range, 2-110 months) with 39% of the patients <24 months of age. Ninety-nine patients (70%) had an underlying disease. Influenza A (pH1N1) 2009 infection was confirmed in 90 patients and the remaining 52 had a positive direct immunofluorescence assay for influenza A. The median length of stay in the pediatric intensive care unit was 12 days (range, 2-52 days). One hundred eighteen patients (83%) received invasive mechanical ventilation and 19 patients were treated with noninvasive ventilation; however, seven of the patients receiving noninvasive ventilation later needed mechanical ventilation. Sixty-eight patients died (47%) with the most frequent cause refractory hypoxemia. Multivariate logistic regression analysis showed that age <24 months (odds ratio, 2.87; 2.35-3.93), asthma (odds ratio, 1.34; 1.20-2.91), and respiratory coinfection with respiratory syncytial virus (odds ratio, 2.92; 1.20-4.10) were associated with higher mortality. As expected, mechanical ventilation and treatment with inotropes were also associated with increased mortality. CONCLUSIONS: The mortality of children admitted to the pediatric intensive care unit with 2009 pH1N1 influenza was high (47%) in our population. Age <24 months, asthma, respiratory coinfection, need of mechanical ventilation, and treatment with inotropes were predictors of poorer outcome.