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Coronary Artery Calcium Scoring and Coronary CT Angiography: Complementary Roles in Diagnosis, Prognosis, and Clinical Management

Coronary artery calcium (CAC) scoring derived from noncontrast CT and coronary CT angiography (CCTA) are increasingly integrated tools for the assessment of coronary artery disease (CAD). CAC quantifies calcified atherosclerotic burden, most commonly using the Agatston method, and provides validated prognostic information that augments clinical risk factors. CCTA supplies lesion-specific anatomic and compositional detail including stenosis severity and high-risk plaque features not captured by CAC. When combined, CAC and CCTA enhance diagnostic performance, improve risk stratification, and can guide personalized management strategies. Important nuances include the limited sensitivity of CAC for noncalcified plaque, the potential for heavy calcification to degrade CCTA image quality through blooming and beam‑hardening artifacts, and the variable incremental utility of CT‑derived functional assessments such as CT‑FFR across calcium strata. Emerging technical advances—virtual noncontrast reconstructions, refined acquisition and reconstruction strategies, photon‑counting CT, quantitative plaque analysis, radiomics, and machine learning—aim to integrate and extend the prognostic value of both modalities. This review synthesizes current evidence on what CAC measures, how CAC and CCTA interact diagnostically and prognostically, clinical implications for symptomatic and asymptomatic patients, technical and practical limitations, and evolving directions in combined CT-based coronary assessment.

Question: Calcium score in CT angiography and its clinical significance

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Smart Implants: Integrating Sensing, Actuation, and Intelligence into Durable Medical Devices

Smart implants combine conventional structural or therapeutic implant functions with integrated sensing, computation, telemetry, and actuation to monitor tissue and device state, enable closed‑loop interventions, and support personalized care. This review synthesizes the technological foundations, representative implementations, clinical motivations, material and engineering strategies, and major translational barriers for smart implants, drawing on advances in instrumented orthopedic components, bioresorbable electronic medicine, stimuli‑responsive implant surfaces, and multifunctional device concepts. Instrumented orthopedic implants that measure strain and loading demonstrate how objective, in vivo mechanical data can guide rehabilitation and evaluate fracture healing. Emerging sensors patterned on load‑bearing substrates, wireless power and telemetry schemes, and on‑board processing enable continuous monitoring, while stimuli‑responsive materials and local drug reservoirs permit targeted antimicrobial delivery and regenerative cues. Bioresorbable electronic systems exemplify combined electrical stimulation and drug release that can improve tissue repair without requiring explantation. Despite these advances, enduring challenges remain in biocompatibility, chronic stability, power and communications, sensor fidelity, mechanical integration, regulatory pathways, and ethical governance. Addressing these challenges through integrated materials engineering, low‑power electronics, secure telemetry, robust signal analytics, and rigorous clinical validation is essential to translate smart implants from preclinical demonstrations to routine clinical practice.

Question: smart implants

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Contemporary Perspectives on Chronic Kidney Disease: Epidemiology, Diagnosis, Therapeutic Advances, and Integrated Care

Chronic kidney disease (CKD) is a prevalent, frequently progressive disorder characterized by persistent abnormalities in kidney structure or function for three months or longer, most commonly manifested as reduced estimated glomerular filtration rate (eGFR) and/or albuminuria or proteinuria. Global and national prevalence estimates range from approximately 10–14% of adults, with substantial underrecognition in early stages. Diabetes and hypertension remain the principal etiologies, while cardiovascular and metabolic conditions both worsen risk and drive progression. Accurate diagnosis and staging require repeated measures of eGFR and albuminuria and increasingly benefit from combined use of serum creatinine and cystatin C for more reliable GFR estimation. Management goals include slowing kidney function decline, preventing cardiovascular disease, and treating metabolic complications such as anemia, CKD–mineral and bone disorder (CKD–MBD), acid–base and electrolyte disturbances. Recent therapeutic advances—most notably agents that improve glycemic control and reduce albuminuria and cardiovascular risk—offer the potential to improve renal and cardiovascular outcomes simultaneously. Practical implementation requires guideline-informed risk stratification, multidisciplinary care, attention to social determinants of health, and perioperative strategies to reduce acute kidney injury and subsequent progression to end-stage kidney disease. This review synthesizes current knowledge on CKD epidemiology, diagnostic approaches, complications, evolving therapeutics, and practical management frameworks to support clinicians in improving outcomes for persons with CKD.

Question: ckd or chronic kidney disease

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Endoscopic Spinal Surgery: Techniques, Indications, Outcomes, and Future Directions

Endoscopic spinal surgery comprises a spectrum of minimally invasive techniques that use an endoscope with dedicated working channels to directly visualize and treat spinal pathology while minimizing soft‑tissue and bony disruption. Initially developed from early percutaneous discectomy work and refined by descriptions of safe transforaminal corridors (Kambin’s triangle), transforaminal endoscopic procedures (PTED/PELD/T‑ESS) are the most widely studied applications. Over recent decades the field has expanded to include interlaminar approaches, cervical anterior and posterior endoscopic techniques, unilateral biportal endoscopy (UBE), and hybrid variants. Evidence from randomized trials, systematic reviews, and meta‑analyses shows that endoscopic discectomy can provide pain relief and functional improvement comparable to conventional microdiscectomy in appropriately selected patients, with consistent perioperative advantages including smaller incisions, less muscle injury, reduced blood loss, shorter hospital stay, and earlier recovery. Limitations include a technically demanding learning curve, equipment needs, constrained working channels (notably in uniportal systems), and case selection boundaries where central stenosis, extensive calcification, instability, or complex deformity may still require open or instrumented approaches. Emerging technologies—improvements in optics and instruments, navigation and integrated endoscope designs, and broader adoption of biportal and hybrid methods—promise to widen indications and improve ergonomics. Available literature remains heterogeneous in design and follow‑up, and further high‑quality trials and long‑term comparative studies are needed to refine indications, quantify recurrence and complication risks across techniques, and establish cost‑effectiveness across healthcare settings (PMID: 32822954; PMID: 22705355; PMID: 30612170; PMID: 40646647; PMID: 33290374; PMID: 35340255; PMID: 26805569; PMID: 26945128; PMID: 31703056; PMID: 36083850; PMID: 40553167; PMID: 32013278).

Question: endoscopic spinal surgery

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Nutritional Management of Crohn's Disease: Evidence-Based Dietary Strategies

Crohn's disease, a chronic inflammatory bowel disease, requires careful dietary management to manage symptoms, maintain nutritional adequacy, and promote disease remission. This review explores various dietary approaches to Crohn's disease based on current evidence. Enteral nutrition and structured food re-introduction are effective for symptom control and maintaining remission. Specific dietary adjustments, such as low-residue, low-fat diets, and the exclusion of dietary fiber in stricturing disease, play critical roles in managing specific disease manifestations. Additionally, the potential of dietary patterns like the Mediterranean diet, exclusive enteral nutrition (EEN), and Crohn's Disease Exclusion Diet (CDED) offer new avenues for reducing inflammation and enhancing patient outcomes. Personalized nutritional support, guided by dietitians and healthcare professionals, is vital to implementing these strategies effectively.

Question: recommended diet for crohn disease

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Understanding the Impact of Lifestyle Modifications on Dementia Prevention

The prevention of dementia and cognitive decline has become a significant focus of scientific inquiry. Substantial evidence suggests that modifying lifestyle habits can substantially reduce the risk of dementia. This review synthesizes recent research on various modifiable lifestyle factors, including physical activity, diet, social and cognitive engagement, as well as multidomain lifestyle interventions. The findings highlight the importance of physical exercise, healthy dietary patterns such as the Mediterranean diet, social activities, and cognitive training as integral components of dementia prevention strategies. Moreover, comprehensive multidomain approaches, exemplified by studies like the FINGER trial, are gaining prominence due to their multifaceted benefits on cognitive health. Although further research is required to identify the most effective strategies, current evidence supports the adoption of specific lifestyle changes as protective measures against dementia.

Question: Lifestyle habits to prevent dementia

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Fibrin: The Architect of Hemostasis and Its Clinical Implications

Fibrin plays a pivotal role in hemostasis, primarily through its involvement in blood clot formation and stabilization. This review delves into the multifaceted nature of fibrin, examining its biochemical transformations from fibrinogen, its structural contributions to clot integrity, and its interactions with coagulation factors and enzymes. The complexity of fibrin polymerization, cross-linking, and degradation processes are discussed, highlighting the influence of genetic and environmental factors on fibrin structure and function. Additionally, clinical implications such as thrombosis, bleeding disorders, and the impact of polymorphisms are explored, showcasing the crucial role fibrin plays in both physiology and pathology.

Question: Impact of fibrin with respect to clotting

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Unanswered Questions: Assessing the Safety of Video-Assisted Thoracic Surgery (VATS) and Rib Fixation in Patients with Active Pneumonia

The safety and viability of performing Video-Assisted Thoracic Surgery (VATS) and rib fixation in patients experiencing active pneumonia remain topics inadequately addressed within the existing body of literature. This review critically evaluates the existing research landscape, highlighting related studies that examine thoracic surgical interventions for complications of pneumonia, such as parapneumonic pleural empyema, while outlining the absence of data directly addressing the question at hand. Through an exploration of study findings and an analysis of clinical implications, this paper aims to delineate the need for further focused research to better inform surgical decisions in cases of active pneumonia requiring thoracic intervention.

Question: Is it safe to perform VATS or rib fixation in patients with active pneumonia

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Advancements in HIV Prevention Strategies: A Comprehensive Review of Pharmacological, Behavioral, and Structural Interventions

HIV prevention remains a pivotal public health concern, necessitating a multifaceted approach that incorporates pharmaceutical, behavioral, and structural interventions. This review synthesizes recent research findings, highlighting significant strategies and interventions in HIV prevention. The review draws on studies discussing the effectiveness of interventions like pre-exposure prophylaxis (PrEP), implementation challenges, and the potential of novel pharmacological developments such as Lenacapavir. Additionally, it addresses economic and structural considerations for effective deployment of these interventions. The synthesis of these research insights underscores the importance of tailored strategies to meet the unique needs of diverse populations, ultimately aiming to reduce the transmission of HIV across different settings.

Question: HIV prevention

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Vertebropexy: An Examination of Spinal Stabilization Techniques and Their Clinical Implications

Vertebropexy, though not a universally recognized term in spinal surgery literature, is conceptually synonymous with procedures designed to stabilize the vertebrae and correct spinal deformities. This paper reviews the current landscape of research surrounding spinal stabilization techniques that align with the objectives of vertebropexy, drawing insights from various studies on vertebral fixation, spinal stabilization, and fusion. An exploration of clinical methods such as the use of expandable cages for vertebral replacement, percutaneous pedicle screw fixation with hydroxyapatite granules, and 3D-printed prosthesis for metastasis management is undertaken. Additionally, the paper evaluates the biomechanical and structural outcomes of different fixation methods, including anterior and posterior strategies. This review underscores the intricate alignment of these procedures with vertebropexy’s goals, offering a comprehensive understanding of how emerging techniques and materials contribute to improved spinal integrity and patient outcomes in cases of spinal instability and vertebral fractures.

Question: Vertebropexy

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