FreshRSS

🔒
❌ Acerca de FreshRSS
Hay nuevos artículos disponibles. Pincha para refrescar la página.
AnteayerTus fuentes RSS

Multiparameter immunoprofiling for the diagnosis and differentiation of progressive versus nonprogressive nontuberculous mycobacterial lung disease–A pilot study

by Paige K. Marty, Balaji Pathakumari, Thomas M. Cox, Virginia P. Van Keulen, Courtney L. Erskine, Maleeha Shah, Mounika Vadiyala, Pedro Arias-Sanchez, Snigdha Karnakoti, Kelly M. Pennington, Elitza S. Theel, Cecilia S. Lindestam Arlehamn, Tobias Peikert, Patricio Escalante

Clinical prediction of nontuberculous mycobacteria lung disease (NTM-LD) progression remains challenging. We aimed to evaluate antigen-specific immunoprofiling utilizing flow cytometry (FC) of activation-induced markers (AIM) and IFN-γ enzyme-linked immune absorbent spot assay (ELISpot) accurately identifies patients with NTM-LD, and differentiate those with progressive from nonprogressive NTM-LD. A Prospective, single-center, and laboratory technician-blinded pilot study was conducted to evaluate the FC and ELISpot based immunoprofiling in patients with NTM-LD (n = 18) and controls (n = 22). Among 18 NTM-LD patients, 10 NTM-LD patients were classified into nonprogressive, and 8 as progressive NTM-LD based on clinical and radiological features. Peripheral blood mononuclear cells were collected from patients with NTM-LD and control subjects with negative QuantiFERON results. After stimulation with purified protein derivative (PPD), mycobacteria-specific peptide pools (MTB300, RD1-peptides), and control antigens, we performed IFN-γ ELISpot and FC AIM assays to access their diagnostic accuracies by receiver operating curve (ROC) analysis across study groups. Patients with NTM-LD had significantly higher percentage of CD4+/CD8+ T-cells co-expressing CD25+CD134+ in response to PPD stimulation, differentiating between NTM-LD and controls. Among patients with NTM-LD, there was a significant difference in CD25+CD134+ co-expression in MTB300-stimulated CD8+ T-cells (p

Hepatopancreaticobiliary Resection Arginine Immunomodulation (PRIMe) trial: protocol for a randomised phase II trial of the impact of perioperative immunomodulation on immune function following resection for hepatopancreaticobiliary malignancy

Por: Behman · R. · Auer · R. C. · Bubis · L. · Xu · G. · Coburn · N. G. · Martel · G. · Hallet · J. · Balaa · F. · Law · C. · Bertens · K. A. · Abou Khalil · J. · Karanicolas · P. J.
Introduction

Surgical stress results in immune dysfunction, predisposing patients to infections in the postoperative period and potentially increasing the risk of cancer recurrence. Perioperative immunonutrition with arginine-enhanced diets has been found to potentially improve short-term and cancer outcomes. This study seeks to measure the impact of perioperative immunomodulation on biomarkers of the immune response and perioperative outcomes following hepatopancreaticobiliary surgery.

Methods and analysis

This is a 1:1:1 randomised, controlled and blinded superiority trial of 45 patients. Baseline and perioperative variables were collected to evaluate immune function, clinical outcomes and feasibility outcomes. The primary outcome is a reduction in natural killer cell killing as measured on postoperative day 1 compared with baseline between the control and experimental cohorts.

Ethics and dissemination

This trial has been approved by the research ethics boards at participating sites and Health Canada (parent control number: 223646). Results will be distributed widely through local and international meetings, presentation, publication and ClinicalTrials.gov (identifier: NCT04549662). Any modifications to the protocol will be communicated via publications and ClinicalTrials.gov.

Trial registration number

ClinicalTrials.gov identifier: NCT04549662.

Out‐of‐pocket expenditure among patients with diabetic foot ulcer in a tertiary care hospital of south India: A cross‐sectional study

Abstract

Diabetic foot ulcer is a debilitating complication of long-standing diabetes mellitus. Patients lose their earning potential, face repeated hospitalizations, and are forced to bear heavy treatment costs. This places an enormous financial burden on the patients and their families. This study seeks to ascertain the out-of-pocket expenditure among these patients and correlate it with their risk factor profile. In this hospital-based cross-sectional study, a total of 154 patients with diabetic foot ulcers or amputations have been studied with an elaborate patient questionnaire and relevant clinical examinations. The costs incurred and the risk factors of the patients were analyzed for statistical association. The median total annual out-of-pocket expenditure for the management of diabetic foot ulcers among the study participants was found to be ₹29 775 (₹9650–₹81 120) ($378.14 [$122.56–$1030.22]). Out of the total expenditure, 58.49% went towards direct medical costs, 5.64% towards direct non-medical costs, and 35.88% for indirect costs. Medications, ulcer dressing and periodic debridement have accounted for 79.26% of direct medical costs. Transportation (61.37%) and patient's loss of income (89.45%) account for the major costs under the direct non-medical and indirect cost categories, respectively. A high ulcer grade and area, long ulcer duration, and past history of ulcers have higher expenditure. Patients seeking treatment from private establishments and those engaged in professional/skilled occupations have higher expenses. Adequate dressing of foot ulcers and proper footwear are associated with lower treatment expenditure. 68.8% of the participants have faced catastrophic expenditure due to treatment costs of diabetic foot ulcers. Adequate glycaemic control and proper foot care are necessary. Patients must seek medical care at the earliest in case of foot ulceration. Clinicians must provide proper wound care, institute effective antibiotics, and manage the complications. Government and insurance schemes are required to alleviate the patients' financial burden.

Hierarchy of demographic and social determinants of mental health: analysis of cross-sectional survey data from the Global Mind Project

Por: Bala · J. · Newson · J. J. · Thiagarajan · T. C.
Objectives

To understand the extent to which various demographic and social determinants predict mental health status and their relative hierarchy of predictive power in order to prioritise and develop population-based preventative approaches.

Design

Cross-sectional analysis of survey data.

Setting

Internet-based survey from 32 countries across North America, Europe, Latin America, Middle East and North Africa, Sub-Saharan Africa, South Asia and Australia, collected between April 2020 and December 2021.

Participants

270 000 adults aged 18–85+ years who participated in the Global Mind Project.

Outcome measures

We used 120+ demographic and social determinants to predict aggregate mental health status and scores of individuals (mental health quotient (MHQ)) and determine their relative predictive influence using various machine learning models including gradient boosting and random forest classification for various demographic stratifications by age, gender, geographical region and language. Outcomes reported include model performance metrics of accuracy, precision, recall, F1 scores and importance of individual factors determined by reduction in the squared error attributable to that factor.

Results

Across all demographic classification models, 80% of those with negative MHQs were correctly identified, while regression models predicted specific MHQ scores within ±15% of the position on the scale. Predictions were higher for older ages (0.9+ accuracy, 0.9+ F1 Score; 65+ years) and poorer for younger ages (0.68 accuracy, 0.68 F1 Score; 18–24 years). Across all age groups, genders, regions and language groups, lack of social interaction and sufficient sleep were several times more important than all other factors. For younger ages (18–24 years), other highly predictive factors included cyberbullying and sexual abuse while not being able to work was high for ages 45–54 years.

Conclusion

Social determinants of traumas, adversities and lifestyle can account for 60%–90% of mental health challenges. However, additional factors are at play, particularly for younger ages, that are not included in these data and need further investigation.

Good while it lasted? Estimating the long-term and withdrawal effects of results-based financing in Malawi on maternal care utilisation using routine data

Por: Dasgupta · T. · De Allegri · M. · Brenner · S. · Kaminjolo-Kambala · C. · Lohmann · J.
Objectives

This study aimed to evaluate the effect of introduction and subsequent withdrawal of the Results-based Financing for Maternal and Newborn Health Initiative (RBF4MNH) in Malawi on utilisation of facility-based childbirths, antenatal care (ANC) and postnatal care (PNC).

Design

A controlled interrupted time series design was used with secondary data from the Malawian Health Management Information System.

Setting

Healthcare facilities at all levels identified as providing maternity services in four intervention districts and 20 non-intervention districts in Malawi.

Participants

Routinely collected, secondary data of total monthly service utilisation of facility-based childbirths, ANC and PNC services.

Interventions

The intervention is the RBF4MNH initiative, introduced by the Malawian government in 2013 to improve maternal and infant health outcomes and withdrawn in 2018 after ceasing of donor funding.

Outcome measures

Differences in total volume and trends of utilisation of facility-based childbirths, ANC and PNC services, compared between intervention versus non-intervention districts, for the study period of 90 consecutive months.

Results

No significant effect was observed, on utilisation trends for any of the three services during the first 2.5 years of intervention. In the following 2.5 years after full implementation, we observed a small positive increase for facility-based childbirths (+0.62 childbirths/month/facility) and decrease for PNC (–0.55 consultations/month/facility) trends of utilisation respectively. After withdrawal, facility-based childbirths and ANC consultations dropped both in immediate volume after removal (–10.84 childbirths/facility and –20.66 consultations/facility, respectively), and in trends of utilisation over time (–0.27 childbirths/month/facility and -1.38 consultations/month/facility, respectively). PNC utilisation levels seemed unaffected in intervention districts against a decline in the rest of the country.

Conclusions

Concurrent with wider literature, our results suggest that effects of complex health financing interventions, such as RBF4MNH, can take a long time to be seen. They might not be sustained beyond the implementation period if measures are not adopted to reform existing health financing structures.

"Just as curry is needed to eat rice, antibiotics are needed to cure fever"--a qualitative study of individual, community and health system-level influences on community antibiotic practices in rural West Bengal, India

Por: Gautham · M. · Bhattacharyya · S. · Maity · S. · Roy · M. B. · Balasubramaniam · P. · Ebata · A. · Bloom · G.
Objectives

To understand community antibiotic practices and their drivers, comprehensively and in contextually sensitive ways, we explored the individual, community and health system-level factors influencing community antibiotic practices in rural West Bengal in India.

Design

Qualitative study using focus group discussions and in-depth interviews.

Setting

Two contrasting village clusters in South 24 Parganas district, West Bengal, India. Fieldwork was conducted between November 2019 and January 2020.

Participants

98 adult community members (42 men and 56 women) were selected purposively for 8 focus group discussions. In-depth interviews were conducted with 16 community key informants (7 teachers, 4 elected village representatives, 2 doctors and 3 social workers) and 14 community health workers.

Results

Significant themes at the individual level included sociodemographics (age, gender, education), cognitive factors (knowledge and perceptions of modern antibiotics within non-biomedical belief systems), affective influences (emotive interpretations of appropriate medicine consumption) and economic constraints (affordability of antibiotic courses and overall costs of care). Antibiotics were viewed as essential fever remedies, akin to antipyretics, with decisions to halt mid-course influenced by non-biomedical beliefs associating prolonged use with toxicity. Themes at the community and health system levels included the health stewardship roles of village leaders and knowledge brokering by informal providers, pharmacists and public sector accredited social health activists. However, these community resources lacked sufficient knowledge to address people’s doubts and concerns. Qualified doctors were physically and socially inaccessible, creating a barrier to seeking their expertise.

Conclusions

The interplay of sociodemographic, cognitive and affective factors, and economic constraints at the individual level, underscores the complexity of antibiotic usage. Additionally, community leaders and health workers emerge as crucial players, yet their knowledge gaps and lack of empowerment pose challenges in addressing public concerns. This comprehensive analysis highlights the need for targeted interventions that address both individual beliefs and community health dynamics to promote judicious antibiotic use.

People living with Alzheimer's disease: Understanding the emerging phenomenon of retrograde plunge with the story theory—An inquiry method

Abstract

Aim

This study aims to (1) introduce the emergent concept of the retrograde plunge experienced by people living with Alzheimer's disease and (2) illustrate how nurses can accompany those experiencing this phenomenon, as well as their family and formal carers, using the seven-phase inquiry process proposed by Smith and Liehr.

Design

Discursive paper.

Methods

After describing the phenomenon and the Story Theory, the 7-phase Inquiry Process presents the fictional story of Mrs. Lurie, a nursing home resident.

Results

Story theory allows nurses to accompany Mrs. Lurie. The emergent concept of retrograde plunge is explained. Different tools such as genograms, story paths and eco-maps are presented. This discussion demonstrates how some perspectives can contribute to a better description of the retrograde plunge phenomenon. The narrative care approach can help give voices to people experiencing retrograde phenomena. The adoption of a perspective that considers embodied language could help to better understand the needs of a person.

Conclusion

There is a lack of consistency and uniformity regarding the understanding of the retrograde phenomenon. This impacts the quality of care for people and the scientific knowledge, research and education of healthcare professionals. This issue should be addressed in future studies.

Implications for the Profession and/or Patient Care

This article shows how story theory helps nurses accompany those facing a retrograde plunge phenomenon, helps them tell their own stories and finds a way to resolve the situation.

Impact

This article paves the way for further developments that must now be realized by the international community of experts involved in the care of people with Alzheimer's disease, from practical, academic and research perspectives.

No Patient or Public Contribution

No patient or public was involved in the design or drafting of the discursive paper.

What Problem did the Study Address?

The retrograde plunge is a phenomenon in which people living with Alzheimer's disease return to their past lives and re-experience with certain events. The retrograde plunge is a well-known concept that is poorly described in scientific literature and is sometimes misunderstood by families and professional caregivers. This discursive article explains the retrograde plunge phenomenon experienced by people living with Alzheimer's disease.

What were the Main Findings?

This article demonstrates how story theory helps nurses and families support people with retrograde plunges. This highlights the lack of consistency and uniformity in this phenomenon, which has implications for the quality of care, education and research. Story theory and the seven-phase inquiry process proposed by Smith and Liehr (in Middle-range theory for nursing, Springer Publishing Company, 2023) help to better understand and explain the retrograde plunge phenomenon.

Where and on Whom will the Research have an Impact?

This article advances nurses' knowledge in the different fields of practice, teaching and research. This article proposes links among the retrograde plunge phenomenon, embodied language and narrative care approach; this could offer further ways to develop nursing knowledge. This study has the potential to advance the knowledge of practice and education and offers new opportunities for research.

Trial and Protocol Registration

There was no trial or protocol registration as this article is a discussion.

Predicting radiographic outcomes of vertebral body tethering in adolescent idiopathic scoliosis patients using machine learning

by Ausilah Alfraihat, Amer F. Samdani, Sriram Balasubramanian

Anterior Vertebral Body Tethering (AVBT) is a growing alternative treatment for adolescent idiopathic scoliosis (AIS), offering an option besides spinal fusion. While AVBT aims to correct spinal deformity through growth correction, its outcomes have been mixed. To improve surgical outcomes, this study aimed to develop a machine learning-based tool to predict short- and midterm spinal curve correction in AIS patients who underwent AVBT surgery, using the most predictive clinical, radiographic, and surgical parameters. After institutional review board approval and based on inclusion criteria, 91 AIS patients who underwent AVBT surgery were selected from the Shriners Hospitals for Children, Philadelphia. For all patients, longitudinal standing (PA or AP, and lateral) and side bending spinal Radiographs were retrospectively obtained at six visits: preop and first standing, one year, two years, five years postop, and at the most recent follow-up. Demographic, radiographic, and surgical features associated with curve correction were collected. The sequential backward feature selection method was used to eliminate correlated features and to provide a rank-ordered list of the most predictive features of the AVBT correction. A Gradient Boosting Regressor (GBR) model was trained and tested using the selected features to predict the final correction of the curve in AIS patients. Eleven most predictive features were identified. The GBR model predicted the final Cobb angle with an average error of 6.3 ± 5.6 degrees. The model also provided a prediction interval, where 84% of the actual values were within the 90% prediction interval. A list of the most predictive features for AVBT curve correction was provided. The GBR model, trained on these features, predicted the final curve magnitude with a clinically acceptable margin of error. This model can be used as a clinical tool to plan AVBT surgical parameters and improve outcomes.

Optimizing CO<sub>2</sub> field flooding during sternotomy: In vitro confirmation of the Karolinska studies

by Mira Puthettu, Stijn Vandenberghe, Spyros Balafas, Clelia Di Serio, Geni Singjeli, Alberto Pagnamenta, Stefanos Demertzis

Although CO2 field-flooding was first used during cardiac surgery more than 60 years ago, its efficacy is still disputed. The invisible nature of the gas and the difficulty in determining the “safe” quantity to protect the patient are two of the main obstacles to overcome for its validation. Moreover, CO2 concentration in the chest cavity is highly sensitive to procedural aspects, such suction and hand movements. Based on our review of the existing literature, we identified four major factors that influence the intra-cavity CO2 concentration during open-heart surgery: type of delivery device (diffuser), delivery CO2 flow rate, diffuser position around the wound cavity, and its orientation inside the cavity. In this initial study, only steady state conditions were considered to establish a basic understanding on the effect of the four above-mentioned factors. Transient factors, such as suction or hand movements, will be reported separately.

Effectiveness of non-surgical management in rotator cuff calcific tendinopathy (the effect trial): protocol for a randomised clinical trial

Por: Caballero · I. · Duenas · L. · Balasch-Bernat · M. · Fernandez-Matias · R. · Breso-Parra · L. · Gallego-Terres · C. · Aroca Navarro · J. E. · Navarro-Bosch · M. · Lewis · J. · Lluch Girbes · E.
Introduction

Rotator cuff calcific tendinopathy (RCCT) involves calcific deposits in the rotator cuff. Non-surgical interventions such as extracorporeal shockwave therapy (ESWT) and ultrasound-guided percutaneous irrigation of calcific tendinopathy (US-PICT) are recommended for its early management. Exercise therapy (ET) has shown to be an effective intervention for people with rotator cuff tendinopathy, but it has not been formally tested in RCCT. The main objective of this study is to compare the effectiveness of an ET programme with ESWT and US-PICT in people with RCCT. As a secondary aim, this study aims to describe the natural history of RCCT.

Methods and analysis

A randomised, single-blinded four-group clinical trial will be conducted. Adults from 30 to 75 years diagnosed with RCCT who accomplish eligibility criteria will be recruited. Participants (n=116) will be randomised into four groups: ET group will receive a 12-week rehabilitation programme; ESWT group will receive four sessions with 1 week rest between sessions during 1 month; US-PICT group will receive two sessions with 3 months of rest between sessions; and (actual) wait-and-see group will not receive any intervention during the 12-month follow-up. The primary outcome will be shoulder pain assessed with the Shoulder Pain and Disability Index at baseline, 2 weeks, 4 months, 6 months and 12 months from baseline. The primary analysis will be performed at 12 months from baseline. Secondary outcomes will include pain, range of motion, patient satisfaction and imaging-related variables. Moreover, the following psychosocial questionnaires with their corresponding outcome measure will be assessed: Central Sensitization Inventory (symptoms related to central sensitization); Pain Catastrophizing Scale (pain catastrophizing); Tampa Scale for Kinesiophobia 11 items (fear of movement); Fear Avoidance Belief Questionnaire (fear avoidance behaviour); Hospital Anxiety and Depression Scale (anxiety and depression); Pittsburgh Sleep Quality Index (sleep quality); and the EuroQol-5D (quality of life). An intention-to-treat analysis will be performed to reduce the risk of bias using a worst-case and best-case scenario analysis.

Ethics and dissemination

Ethics committee approval for this study has been obtained (reference number: 1718862). The results of the main trial will be submitted for publication in a peer-reviewed journal.

Trial registration number

NCT05478902.

Early Neolithic pastoral land use at Alsónyék-Bátaszék, Hungary (Starčevo culture): New insights from stable isotope ratios

by Magdalena Blanz, Marie Balasse, Delphine Frémondeau, Erika Gál, Anett Osztás, Anna Zs. Biller, Éva Á. Nyerges, Denis Fiorillo, Eszter Bánffy, Maria Ivanova

The earliest introduction of livestock (cattle, goats, sheep, pigs) into the Carpathian Basin was an important step towards farming expansion into continental Europe. This spread beyond the environments of the southern Balkans was accompanied by a reduction in the spectrum of cultivated crops, changes in the relative representation of different domestic animals, and, most likely, adaptations of husbandry practices. How the earliest farmers in the Carpathian Basin kept their domestic stock is still understudied. We explored early animal management and land use strategies at the Starčevo settlement at Alsónyék-Bátaszék, Hungary (Early Neolithic, ca. 5800–5600 cal BC). Settled at the intersection of wide alluvial plains, waterlogged meadows and marshes to the east, and forested hills to the west, early farmers at Alsónyék had a wide variety of options for nourishing their livestock. We performed stable isotope ratio analysis of bone collagen (n = 99; δ13C, δ15N) and tooth enamel (nteeth = 28, sequentially sampled for δ13C and δ18O) from wild and domestic animals to locate them in the landscape and investigate herding practices on a seasonal scale. The bone collagen isotope ratios mostly indicate feeding in open environments. However, results from the sequential analysis of cattle and sheep enamel suggest diverse dietary strategies for winters, including consumption of forest resources, consumption of summer hay and grazing in an open environment. Most pigs appear to have had herbivorous diets, but several individuals likely supplemented their diet with animal protein. Stable isotope ratio results from the Lengyel phase at Alsónyék (ca. 4800–4300 cal BC) suggest more access to animal protein for pigs, and feeding in more open areas by wild boar, red deer and cattle compared to the Starčevo phase. This study’s results demonstrate considerable variability in early animal husbandry practices at Alsónyék.

Antibiofilm and antimicrobial activity of Lactobacillus cell free supernatant against Pseudomonas aeruginosa isolated from burn wounds

Abstract

The present study investigated the antimicrobial and anti-biofilm effects of indigenous Lactobacillus probiotic strains on Pseudomonas aeruginosa isolated from burn wound infection in laboratory conditions. The effect of 7 probiotic strains isolated from infant faeces on the pathogenicity factors of P. aeruginosa, including protease, elastase, antibiofilm and antipyocyanin was measured. Also, diffusion methods in the well and micro broth dilution were used to evaluate the antimicrobial activity of probiotics. All tests were performed in triplicate. A negative control and a positive control were used for each test. SPSS version 22 software was used for statistical analysis, and a p < 0.05 was considered statistically significant. A total of 30 clinical isolates of P. aeruginosa were isolated. The elastolytic activity of P. aeruginosa isolates decreased after adding Cell free supernatant (CFS) of each Lactobacillus. L1, L4, L5, and L6 strains had a 100% inhibitory effect on pathogen isolates. L3 and L7 strains had the lowest inhibitory effect. The inhibitory effect of CFS extracted from lactobacilli on protease production by P. aeruginosa. L1, L4, L5, and L6 strains had an inhibitory effect on all tested isolates. L2, L3, and L7 strains had a less inhibitory effect. L4 strain had the highest inhibitory effect on pyocyanin production by P. aeruginosa (50%), followed by L5 (43.3%), L1 (40%), and L6 (23.3%) strains. L3 and L7 strains had no inhibitory effect on the pyocyanin production of P. aeruginosa isolates. It was found that the CFS of 4 isolates (L1, L4, L5, and L6) was the most active extract and had a 100% inhibitory effect against biofilm formation of all P. aeruginosa strains. The L3 strain had the least inhibitory effect against the biofilm formation of pathogens. Overall, this study showed that probiotics could be promising alternatives to combat the pathogenicity of P. aeruginosa in burn wounds.

Experience and impact of gender-based violence in Honiara, Solomon Islands: a cross-sectional study recording violence over a 12-month period

Por: Chadwick · V. · Kluckow · H. · Mapstone · K. · Whiffin · V. · Ryder · B. · Rimon · M. · Hebala · H. · Hill · S. · Martiniuk · A. L.
Objective

This study aims to collect data on the experience and impact of gender-based violence experienced by women attending health clinics in Honiara, Solomon Islands.

Method

Any woman over the age of 18 who attended a local health clinic in Honiara, Solomon Islands during the time of recruitment (ten consecutive weekdays in May 2015) was eligible to participate in an interviewer administered, in-person survey, gathering data on gender-based violence over the past 12 months.

Results

A total of 100 women were recruited into this study. Of these women, 47% of women reported experiencing physical or sexual violence in the past 12 months. The most common perpetrators were the woman’s husband or boyfriend. There are low rates of reporting, particularly through formal avenues such as to police or village leaders. Alcohol was involved in more than half the cases of reported violence.

Conclusion

Women in this study report high rates of gender-based violence. To our knowledge, this is the only study examining women’s personal experience of gender-based violence in the Solomon Islands, with self-reported data on the frequency and nature of the violence, and the impact on women, including physical and mental, utilisation of healthcare services, police and legal involvement. Efforts to reduce gender-based violence should aim to reduce intimate partner violence, increase reporting and address wider social attitudes towards gender equality.

Evaluating the performance of artificial intelligence software for lung nodule detection on chest radiographs in a retrospective real-world UK population

Por: Maiter · A. · Hocking · K. · Matthews · S. · Taylor · J. · Sharkey · M. · Metherall · P. · Alabed · S. · Dwivedi · K. · Shahin · Y. · Anderson · E. · Holt · S. · Rowbotham · C. · Kamil · M. A. · Hoggard · N. · Balasubramanian · S. P. · Swift · A. · Johns · C. S.
Objectives

Early identification of lung cancer on chest radiographs improves patient outcomes. Artificial intelligence (AI) tools may increase diagnostic accuracy and streamline this pathway. This study evaluated the performance of commercially available AI-based software trained to identify cancerous lung nodules on chest radiographs.

Design

This retrospective study included primary care chest radiographs acquired in a UK centre. The software evaluated each radiograph independently and outputs were compared with two reference standards: (1) the radiologist report and (2) the diagnosis of cancer by multidisciplinary team decision. Failure analysis was performed by interrogating the software marker locations on radiographs.

Participants

5722 consecutive chest radiographs were included from 5592 patients (median age 59 years, 53.8% women, 1.6% prevalence of cancer).

Results

Compared with radiologist reports for nodule detection, the software demonstrated sensitivity 54.5% (95% CI 44.2% to 64.4%), specificity 83.2% (82.2% to 84.1%), positive predictive value (PPV) 5.5% (4.6% to 6.6%) and negative predictive value (NPV) 99.0% (98.8% to 99.2%). Compared with cancer diagnosis, the software demonstrated sensitivity 60.9% (50.1% to 70.9%), specificity 83.3% (82.3% to 84.2%), PPV 5.6% (4.8% to 6.6%) and NPV 99.2% (99.0% to 99.4%). Normal or variant anatomy was misidentified as an abnormality in 69.9% of the 943 false positive cases.

Conclusions

The software demonstrated considerable underperformance in this real-world patient cohort. Failure analysis suggested a lack of generalisability in the training and testing datasets as a potential factor. The low PPV carries the risk of over-investigation and limits the translation of the software to clinical practice. Our findings highlight the importance of training and testing software in representative datasets, with broader implications for the implementation of AI tools in imaging.

Formación de Enfermeras en el Manejo del Paciente Portador de Membrana de Oxigenación Extracorpórea (ECMO)

Objetivo principal: Conocer la importancia de la formación de enfermeras en terapia ECMO para mejorar habilidades y competencias enfermeras y cuidados al paciente. Metodología: Se realizó la búsqueda bibliográfica en Pubmed y Cinahl. Tras aplicar filtros para limitarla a los criterios de inclusión, se obtuvieron 223 y 933 artículos, respectivamente. En la lectura crítica para los artículos seleccionados, se utilizaron las parrillas STROBE y CASPe. Resultados principales: Tras realizar simulaciones con ECMO y recibir formación, los participantes sentían mejora personal. Se presentaron evaluaciones del plan de estudios que incluían la aplicabilidad del material, comprensión de conceptos y mayor confianza y seguridad. La simulación tuvo impacto positivo en las habilidades y el manejo del paciente. Conclusión principal: La formación con simulación mejora las habilidades y competencias enfermeras y la calidad de los cuidados.

Efectividad del aceite de coco como tratamiento alternativo para la pediculosis capitis en niños: revisión sistemática

Objetivo principal: Analizar la efectividad del tratamiento de la pediculosis capitis con aceite de coco versus la permetrina o ivermectina para la reducción de la infestación en niños escolares. Metodología: Revisión sistemática con análisis interpretativo. Se consultaron bases de datos como PubMed, ScienceDirect, Epistemonikos, entre otros. Se incluyeron documentos publicados entre 2011 y 2021 derivados de la cadena de búsqueda: aceite de coco AND pediculosis capitis AND efectividad en español e inglés. Resultados principales: Después de aplicar criterios de exclusión y eliminación, se analizaron 10 documentos, que incluían ensayos comunitarios, estudios preclínicos de laboratorio y revisiones sistemáticas, los cuales proponen el aceite de coco como un tratamiento alternativo eficaz contra la pediculosis. Conclusión principal: Aunado a los reportes de alta efectividad de tratamiento, no se reportan efectos adversos y se sugiere el uso de gorra de baño así como un peinado vigoroso con una lendrera para aumentar la efectividad.

Terapia profiláctica con corticoides en la prevención del edema laríngeo postextubación: Una revisión sistemática

Objetivo principal: Determinar si el tratamiento profiláctico con corticoides administrados por vía intravenosa y/o inhalatoria es efectivo en la preven-ción del edema laríngeo postextubación en aquellos pacientes en riesgo de desarrollarlo tras la retirada del tubo orotraqueal. Metodología: Se realizó una revisión sistemática mediante búsqueda en bases de datos de gran evidencia, estableciendo unos criterios de inclusión y exclusión para obtener una mayor especificidad del tema. Se incluyeron 8 artículos. Resultados principales: El tratamiento con corticoides para prevenir el edema laríngeo postextubación, estridor y tasa de reintubación fue eficaz en pacientes en riesgo. Conclusión principal: La variabilidad de los distintos estu-dios no permitió determinar el tipo, dosis y régimen terapéutico más efectivo. Tampoco se pudo concretar si la disminución en la tasa de reintuba-ción ha contribuido en una reducción de los costes a consecuencia de este fenómeno.

❌