Internal medicine

  Diuretic Resistance: Mechanisms, Clinical Nuances, and State-of-the-Art Management A Comprehensive Review for Internists and Postgraduate Physicians Dr Neeraj Manikath , claude.ai Keywords: Diuretic resistance, loop diuretics, braking phenomenon, sequential nephron blockade, cardiorenal syndrome, pharmacokinetics Abstract Diuretic resistance—defined as the failure to achieve adequate natriuresis despite escalating doses of loop diuretics—remains one of the most clinically vexing problems in internal medicine. It complicates the management of heart failure, cirrhosis, nephrotic syndrome, and chronic kidney disease, and its mishandling contributes substantially to avoidable hospitalizations, worsening renal function, and adverse outcomes. The pathophysiology is multifactorial, rooted in pharmacokinetic alterations, compensatory neurohormonal activation, tubular hypertrophy, and dietary indiscretion. A nuanced understanding of loop diuretic dose-response pharmacodynamics, the...

  Acute Kidney Injury Staging and Its Prognostic Implications: A Clinician's Compendium of Bedside Craft, Evidence, and Evolving Paradigms Dr Neeraj Manikath , claude.ai Word Count: ~5000 Keywords: Acute kidney injury, KDIGO criteria, creatinine kinetics, furosemide stress test, renal angina index, AKI staging, prognosis Abstract Acute kidney injury (AKI) remains one of the most prevalent and lethal syndromes encountered in hospitalized patients, carrying mortality rates that rival sepsis and myocardial infarction when severe. The Kidney Disease: Improving Global Outcomes (KDIGO) staging framework, while pivotal in standardizing nomenclature and risk stratification, is frequently misapplied at the bedside due to fundamental conceptual gaps — chiefly the kinetic limitations of serum creatinine, the impracticality of accurate urine output measurement in non-ICU settings, and the failure to incorporate trajectory analysis into clinical decision-making. This review synthesizes ...

  The Altered Mental Status Algorithm: A Clinician's Master Guide to Toxic-Metabolic, Structural, and Infectious Etiologies Dr Neeraj manikath , claude.ai Word Count: ~5000 words Abstract Altered mental status (AMS) represents one of the most demanding diagnostic challenges in clinical medicine, serving as the final common pathway for hundreds of distinct pathophysiological processes. The clinician confronting a confused, obtunded, or comatose patient must simultaneously stabilize the patient, generate a broad differential, direct targeted investigations, and initiate empirical therapy — often within minutes. This review provides a systematic, clinically grounded approach to AMS, structured around the critical tripartite categorization of toxic-metabolic, structural, and infectious etiologies. We discuss the nuances of history and examination, the indications and interpretation of investigations including electroencephalography (EEG), and the judicious use of empirical treat...