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Clear definitions and detailed explanations of healthcare, nephrology, and dialysis terminology. Written for clinical professionals and healthcare administrators.
Balloon dilation of a narrowed dialysis access to restore flow — the standard endovascular treatment for stenosis.
Cleaned blood re-entering the arterial needle instead of returning to the body — a hidden cause of underdialysis.
Narrowing of a dialysis fistula or graft — the leading cause of access failure and thrombosis.
A surgical connection between an artery and a vein, typically in the forearm, created to provide reliable vascular access for hemodialysis.
A synthetic tube surgically implanted to connect an artery to a vein for hemodialysis access when native vessels are unsuitable for AV fistula creation.
A middle molecule that accumulates in dialysis patients — the driver of dialysis-related amyloidosis.
The standard dialysis bath using bicarbonate buffer — better cardiovascular tolerance than acetate.
The whooshing sound of blood flowing through a dialysis fistula or graft, heard with a stethoscope — the audible twin of the thrill.
The technique of inserting a needle into a vascular access to establish blood flow for hemodialysis, requiring specialized skills to prevent complications and preserve access longevity.
Bloodstream infection originating from a dialysis catheter — a major preventable cause of hospitalization and death.
A flexible tube inserted into a large central vein (usually internal jugular) to provide temporary or permanent vascular access for hemodialysis when AV fistula or graft is unavailable.
Regional anticoagulation for CRRT using citrate — the preferred option in bleeding-risk ICU patients.
A peritoneal dialysis modality requiring 4-5 manual exchanges of dialysate daily, each involving a 20-30 minute drain and refill, performed by the patient at home.
Slow, continuous kidney replacement for critically ill ICU patients — gentler than intermittent hemodialysis.
The specially formulated solution used in dialysis that draws waste products and excess electrolytes from the blood across the dialyzer membrane.
The sodium concentration of the dialysis bath — a lever for blood pressure, thirst, and intradialytic symptoms.
The medical treatment that artificially performs the kidney's filtering functions — removing waste, toxins, and excess fluid from the blood when kidneys fail.
The assessment of whether dialysis treatment provides sufficient clearance of waste products and fluid removal to maintain patient health and quality of life, measured primarily by Kt/V and clinical outcomes.
The measure of how completely dialysis clears waste — tracked with Kt/V and URR to prevent underdialysis.
The eating plan for dialysis patients - higher protein (1.2 g/kg/day) with tight potassium, phosphorus, sodium, and fluid control.
The artificial kidney component of a dialysis machine containing a semipermeable membrane that filters waste and excess fluid from blood.
The target body weight of a dialysis patient after all excess fluid has been removed — the weight at which blood pressure is normal without medication.
Lipopolysaccharide components of bacterial cell walls that cause pyrogenic reactions; their levels in dialysis water must be strictly controlled per AAMI/ISO standards.
A dye study of the dialysis access to detect stenosis — the diagnostic step before access angioplasty.
A condition of excess extracellular fluid volume in dialysis patients resulting from inadequate fluid removal between or during sessions, associated with hypertension, pulmonary congestion, and increased mortality.
Excess extracellular fluid volume in kidney patients from inadequate excretion, causing edema, hypertension, pulmonary congestion, and increased cardiovascular risk.
An advanced dialysis modality combining hemodialysis (diffusion) with hemofiltration (convection) to enhance clearance of both small and middle molecular weight solutes.
A medical procedure that filters waste products, excess fluids, and toxins from the blood using a dialysis machine when the kidneys can no longer perform this function adequately.
The device that pumps a patient's blood through a dialyzer, mixing it with dialysate to remove waste, salts, and excess fluid during hemodialysis.
A renal replacement therapy that removes fluid and solutes by convection — the basis of continuous therapies in the ICU.
A dialyzer membrane with high water and middle-molecule permeability — standard for modern hemodialysis.
Dialysis performed at home by the patient (with a partner) using a compact machine - offering flexible schedules, better outcomes, and more independence.
Starting dialysis with fewer sessions and increasing as residual kidney function declines — preserves residual function and reduces burden.
The weight gained between dialysis sessions from fluid and salt intake - kept below ~3% of dry weight to protect the heart.
A sudden drop in blood pressure during a dialysis session, occurring in 20-30% of sessions and representing the most common intradialytic complication.
Blood pressure drop during dialysis — the most common intradialytic complication, driven by ultrafiltration.
A dimensionless number used to quantify dialysis adequacy, where K = dialyzer clearance, t = treatment time, and V = volume of distribution of urea.
Slow overnight hemodialysis (6-8 hours, 3-6 nights/week) that improves solute clearance and fluid control.
A dialysis modality that uses the patient's peritoneal membrane as a natural filter, with dialysate fluid introduced into the abdominal cavity to remove waste and excess fluid.
The sterile dialysate fluid instilled into the abdomen during peritoneal dialysis — dextrose-based, drawing waste and fluid across the peritoneal membrane.
Inflammation of the peritoneal membrane caused by infection during peritoneal dialysis, the most common serious complication requiring prompt diagnosis and antibiotic treatment.
A procedure that removes plasma from the blood to clear harmful antibodies — used in anti-GBM disease, vasculitis, and some transplant complications.
The collective term for treatments that replace kidney function — hemodialysis, peritoneal dialysis, and kidney transplant.
The kidney function a dialysis patient retains after starting treatment — worth preserving, since it improves survival and quality of life.
The water purification system using reverse osmosis membranes to produce ultrapure water required for dialysate preparation in hemodialysis.
A simplified Kt/V calculation that models the body as a single urea compartment without accounting for urea rebound after dialysis, commonly used for routine adequacy monitoring.
A continuous buzzing vibration felt over a functioning AV fistula or graft — the physical sign that blood is flowing well through the access.
A long-term central venous catheter (CVC) for dialysis — a bridge when no fistula exists, with higher infection risk.
The process of removing excess fluid from a patient's blood during dialysis by applying pressure across the dialyzer membrane.
Dialysate with very low bacterial and endotoxin counts — the standard for high-flux HD and HDF.
The percentage reduction in blood urea nitrogen (BUN) during a single hemodialysis session, used as a screening measure of dialysis adequacy.
The surgical connection created to allow blood to flow between the patient's circulatory system and the dialysis machine during hemodialysis sessions.
The purification system that produces ultrapure water for dialysate preparation, critical for patient safety during hemodialysis.
A progressive condition characterized by gradual loss of kidney function over months or years, classified into 5 stages based on eGFR.
A waste product of muscle metabolism filtered by the kidneys; serum creatinine levels are used to estimate GFR and monitor kidney function over time.
The final stage of chronic kidney disease (Stage 5, eGFR <15) where kidneys can no longer sustain life without dialysis or transplantation.
A calculated value estimating the rate at which kidneys filter blood, used to diagnose and stage chronic kidney disease.
Inflammation of the kidney's filtering units (glomeruli) - a diverse family of diseases often presenting with blood and protein in urine.
Persistently elevated blood pressure - the second leading cause of kidney failure and a driver of CKD progression at every stage.
A surgical procedure in which a healthy kidney from a living or deceased donor is transplanted into a patient with end-stage renal disease to restore kidney function.
Inflammation of the kidney - especially the filtering units (glomeruli) or tubules - presenting with blood or protein in urine, swelling, and high blood pressure.
A physician who specializes in the diagnosis and treatment of kidney disease, including hypertension, CKD, dialysis, and transplant medicine.
The medical specialty focused on the diagnosis, treatment, and management of kidney diseases, including dialysis and transplant care.
Heavy protein loss in urine (proteinuria >3.5 g/day) with low albumin, edema, and high cholesterol - a hallmark of glomerular disease.
Abnormal presence of protein in the urine, a key marker of kidney damage and the strongest predictor of CKD progression and cardiovascular risk.
Anemia secondary to chronic kidney disease, primarily caused by inadequate erythropoietin production by damaged kidneys, managed with ESAs and iron supplementation.
A nutrition specialist who designs individualized kidney diets - balancing potassium, phosphorus, sodium, protein, and fluid against lab values.
A toxic condition caused by the accumulation of nitrogenous waste products in the blood due to severe kidney dysfunction, characterized by nausea, fatigue, confusion, and metabolic disturbances.
India's national digital health ecosystem initiative that creates a unified health infrastructure including unique health IDs, consent management, and interoperable health records across providers.
A voluntary 14-digit health identifier assigned to every citizen under ABDM, enabling creation of a longitudinal electronic health record and consent-based sharing across healthcare providers.
India's central legislation for regulating clinical establishments to prescribe minimum standards of facilities and services across public and private healthcare providers.
India's Digital Personal Data Protection Act — the data-protection law governing patient data in health software.
The CMS regulations that dialysis facilities must meet to bill Medicare — the US dialysis compliance framework.
The CMS pay-for-performance program that adjusts dialysis facility payment based on quality measures.
A systematic evaluation of a healthcare facility's adherence to regulatory standards, accreditation requirements, and internal policies covering clinical, administrative, and safety domains.
The US Health Insurance Portability and Accountability Act — the privacy and security rule for protected health information.
A systematic program of policies, procedures, and surveillance activities designed to prevent healthcare-associated infections by reducing transmission of pathogens among patients and healthcare workers.
National Accreditation Board for Hospitals & Healthcare Providers — India's premier healthcare quality accreditation body under the Quality Council of India.
National Accreditation Board for Testing and Calibration Laboratories — accreditation body for medical laboratories ensuring quality and competence.
An electronic medical record purpose-built for dialysis sessions — treatment charts, machine data, and outcomes in one flow.
The real-time connection between dialysis machines and a clinical information system via HL7 or proprietary protocols, enabling automatic capture of treatment parameters, alarms, and machine status.
A modern healthcare data exchange standard developed by HL7 that uses RESTful APIs and modular 'resources' for flexible, web-friendly interoperability.
The ability of different healthcare information systems, devices, and applications to access, exchange, integrate, and cooperatively use data in a coordinated manner across organizational boundaries.
A set of international standards for the exchange of clinical and administrative health data between healthcare information systems.
The automated connection between laboratory analyzers and the clinical information system for electronic ordering, sample tracking, result capture, quality control, and critical value alerting.
The systematic recording of patient care — assessments, treatments, observations, and outcomes — in a structured format that supports clinical decisions, billing, compliance, and research.
A comprehensive, longitudinal patient record designed to be shared across multiple healthcare providers and settings.
A digital version of a patient's paper chart containing medical history, diagnoses, medications, treatment plans, and test results within a single facility.
A systematic data collection infrastructure that aggregates outcomes from dialysis and transplant facilities to benchmark quality, identify trends, and improve population-level renal care.
A comprehensive, integrated information system that manages all aspects of hospital operations including clinical, administrative, and financial functions.
The department of a hospital where patients are admitted for overnight stays requiring continuous nursing care and medical monitoring.
A software system that manages laboratory workflows — test ordering, sample tracking, result processing, quality control, and reporting to clinical systems.
The department of a hospital or clinic where patients receive diagnosis, treatment, and consultation without being admitted overnight.
A trained healthcare professional who performs direct patient care tasks in dialysis centers including machine setup, vital sign monitoring, and session documentation under nursing supervision.
A structured method of clinical documentation organized into four sections: Subjective (patient-reported symptoms), Objective (measurable findings), Assessment (clinical diagnosis/analysis), and Plan (treatment strategy).
A sudden drop in kidney function over hours to days - reversible if caught early, but a major risk factor for chronic kidney disease.
Albumin leaking into urine — the earliest and most important marker of kidney filter damage, measured by urine albumin-to-creatinine ratio (UACR).
An inherited collagen IV disorder causing hematuria, progressive kidney failure, hearing loss, and eye changes.
Autoimmune inflammation of small blood vessels with ANCA antibodies — often rapidly progressive glomerulonephritis.
Low hemoglobin caused by kidney failure — reduced erythropoietin production, iron deficiency, and inflammation — treated with iron and ESAs.
Antibodies against the glomerular basement membrane causing rapidly progressive nephritis with lung hemorrhage.
No urine output (typically under 100 mL/day) — a severe sign of kidney failure or obstruction that usually requires urgent evaluation.
A rare, life-threatening complication of advanced kidney disease where calcium deposits block small skin blood vessels, causing painful necrotic wounds.
The bidirectional failure of heart and kidneys — one organ's dysfunction worsens the other.
Median nerve compression at the wrist — common in dialysis patients from amyloid and fluid effects.
Acute kidney injury occurring within 48 hours of receiving iodinated contrast media, most relevant in people with pre-existing CKD and diabetes.
Acute kidney injury following iodinated contrast — a preventable complication of imaging.
Rapidly progressive glomerulonephritis with crescent-shaped cellular scars in the kidney filters — a medical emergency that can destroy kidney function in weeks.
Kidney damage caused by diabetes - the leading cause of kidney failure worldwide, driven by hyperfiltration, albuminuria, and progressive scarring.
Beta-2 microglobulin amyloid deposits in joints after years of dialysis — carpal tunnel and bone cysts.
Fluid accumulation in body tissues — usually feet, ankles, or around the eyes — the visible sign of fluid retention in kidney disease.
A hormone made mostly by the kidneys that stimulates red blood cell production — its deficiency drives the anemia of kidney disease.
A scarring pattern of the glomeruli that causes nephrotic-range proteinuria and progressive CKD.
Blood in the urine — visible (gross) or microscopic — with causes ranging from infection and stones to glomerulonephritis and malignancy.
Kidney failure from advanced liver disease — functional, potentially reversible with liver transplant.
Blood calcium above the normal range - in CKD usually from over-suppressed PTH, excess calcium binders, or tertiary hyperparathyroidism.
High potassium in the blood — a common and potentially dangerous complication of CKD, especially with ACEi/ARB therapy — causing heart rhythm disturbances at severe levels.
Blood phosphate above ~5.5 mg/dL - a CKD mineral-bone disorder driver that accelerates vascular calcification and bone disease.
Blood potassium below ~3.5 mEq/L - less common than hyperkalemia in CKD but dangerous, causing muscle weakness and arrhythmias.
Blood sodium below ~135 mEq/L - in kidney disease usually from fluid overload, excess free-water intake, or medications.
The most common primary glomerulonephritis worldwide — IgA immune deposits in the glomeruli, often surfacing after a respiratory infection.
Inflammation of the kidney tubules and interstitium — most often drug-induced acute interstitial nephritis.
Hard mineral deposits that form in the kidneys - most commonly calcium oxalate - causing pain, blood in urine, and repeated episodes.
Kidney inflammation caused by systemic lupus erythematosus — a major cause of morbidity in SLE.
Extremely high blood pressure with end-organ damage — a medical emergency affecting the kidneys, brain, and eyes.
A leading cause of nephrotic syndrome in adults — antibodies attacking the glomerular basement membrane.
A build-up of acid from failing kidneys (reduced bicarbonate) - common in advanced CKD and a treatable driver of progression.
Hematuria with hypertension and reduced kidney function — the pattern of glomerular inflammation.
Any substance — commonly NSAIDs, contrast, aminoglycosides, and some herbal products — that can injure the kidneys, especially in CKD.
Kidney damage from blocked urine flow — a common, often reversible cause of CKD and AKI.
Low urine output (under ~400-500 mL/day) — a key AKI criterion and a sign that the kidneys are not clearing fluid and waste effectively.
An inherited condition where fluid-filled cysts grow in the kidneys, enlarging them and slowly destroying filtering function - the most common inherited cause of kidney failure.
Glomerulonephritis with rapid loss of kidney function over days to weeks — a nephrology emergency.
Bone disease caused by chronic kidney disease — abnormal bone turnover from calcium, phosphate, vitamin D, and PTH disturbances.
Narrowing of the renal arteries — a cause of secondary hypertension and ischemic kidney disease.
Overactive parathyroid glands caused by kidney failure — driven by low vitamin D, high phosphate, and low calcium — damaging bones and vessels if untreated.
A rare, late sign of advanced kidney failure where urea crystallizes on the skin as a white powdery film — seen only in severely untreated uremia.
Calcium deposits in blood vessels of CKD patients — the link between mineral imbalance and cardiovascular death.
The immune system's attack on a transplanted organ — acute (treatable, days-weeks) or chronic (slower, months-years) — diagnosed by biopsy and treated with immunosuppression.
A person who donates a kidney during their lifetime — usually a family member or friend — with outcomes generally better than deceased-donor transplants.
A program where incompatible donor-recipient pairs swap kidneys so each recipient receives a compatible kidney from another pair's donor.
Kidney transplantation performed before dialysis is ever needed — associated with the best graft and patient outcomes.
A blood-pressure drug (e.g., ramipril, lisinopril, enalapril) that also protects the kidneys by reducing protein leakage.
A blood-pressure drug (e.g., telmisartan, losartan, valsartan) with kidney-protective effects similar to ACE inhibitors.
Oral sodium bicarbonate used to correct metabolic acidosis in CKD and slow disease progression.
A calcimimetic that lowers PTH in secondary hyperparathyroidism by sensitizing the calcium-sensing receptor.
A synthetic erythropoietin (epoetin alfa, darbepoetin) used to treat anemia of kidney disease.
Iron given by infusion to treat iron-deficiency anemia in CKD — safer and more effective than oral iron in advanced stages.
A rare but serious metabolic emergency — the reason metformin is stopped at advanced eGFR.
A diuretic (furosemide, torsemide, bumetanide) that removes fluid in CKD and dialysis patients by blocking sodium reabsorption.
The first-line diabetes drug — safe in early-mid CKD with dose adjustment, stopped at advanced stages due to lactic acidosis risk.
Kidney injury caused by NSAIDs (ibuprofen, diclofenac, naproxen) — a leading preventable cause of AKI and CKD progression.
Iron supplements (ferrous sulfate, ferrous fumarate) taken by mouth to correct iron deficiency in early CKD.
A gut potassium binder (Veltassa) used to manage chronic hyperkalemia and enable RAAS inhibitor therapy.
A medication taken with meals that binds dietary phosphate in the gut so it is not absorbed - the cornerstone of phosphate control in advanced CKD.
A medication that binds potassium in the gut to lower blood potassium — allowing patients with CKD to stay on protective ACEi/ARB therapy.
A calcium-free phosphate binder used to lower phosphorus in CKD and dialysis patients.
A diabetes drug (dapagliflozin, empagliflozin) that reduces kidney and heart risk in CKD even without diabetes.
The guidance to temporarily hold ACE inhibitors, ARBs, diuretics, SGLT2 inhibitors, and metformin during acute illness to prevent AKI.
A newer potassium binder (Lokelma) that removes potassium through the gut in chronic hyperkalemia.
A mild diuretic (hydrochlorothiazide, chlorthalidone) used for hypertension, with limited effect when eGFR is very low.
The dangerous drug combination of a RAAS inhibitor, a diuretic, and an NSAID — a classic cause of acute kidney injury.
Active vitamin D (calcitriol, paricalcitol) used to control secondary hyperparathyroidism in CKD.
Elevated nitrogen waste (urea, creatinine) in the blood — the biochemical sign that kidney filtration has fallen, whether from CKD, AKI, or dehydration.
The ratio of blood urea nitrogen to creatinine, used to tell whether an elevated creatinine is from dehydration, kidney damage, or obstruction.
A GFR marker independent of muscle mass — useful when creatinine misleads (extremes of body composition, cirrhosis).
An iron-storage protein — the iron marker tracked with TSAT to guide anemia treatment in CKD.
The volume of plasma filtered by the glomeruli per minute — the best overall measure of kidney function.
The parathyroid hormone level used to diagnose and monitor CKD-MBD — targets rise with CKD stage.
A procedure that takes a tiny sample of kidney tissue for a microscope to diagnose glomerular disease, guide treatment, and assess injury or rejection.
A spot urine test that estimates daily protein loss — the 24-hour urine collection's practical replacement, reported as grams of protein per gram of creatinine.
A protein marker of nutrition and inflammation — a strong prognostic indicator in CKD and dialysis.
The most measured kidney blood test — a muscle-waste product filtered by the glomeruli, interpreted with eGFR.
The percentage of transferrin carrying iron — the functional iron marker paired with ferritin in CKD.
The ratio of albumin to creatinine in a spot urine sample — the most sensitive marker of early kidney damage.
A nitrogen waste product from protein breakdown that the kidneys excrete; high blood urea (BUN) signals reduced filtration or high protein intake.
The waste molecules that accumulate when kidneys fail and cause the symptoms of uremia — beyond urea and creatinine, a broad family of poorly cleared compounds.
A waste product of purine breakdown excreted by the kidneys - high levels cause gout and uric-acid kidney stones, and are common in CKD.
The basic urine test - chemical dipstick plus microscopic examination - that screens for protein, blood, glucose, infection, and casts.
The volume of urine produced daily — a simple vital sign of kidney function and fluid balance.
Dietary Approaches to Stop Hypertension — a fruit-, vegetable-, and low-salt eating pattern adapted for kidney patients.
Phosphorus from food — including phosphate additives that are nearly 100% absorbed and the hidden driver of hyperphosphatemia.
Potassium obtained from food and drink — the main modifiable driver of blood potassium levels in kidney disease.
Protein intake planning for kidney disease — enough to prevent malnutrition, low enough to limit urea and phosphorus load.
Sodium from salt and processed foods — the main driver of fluid retention and blood pressure in kidney disease.
The daily fluid limit for dialysis patients — typically 500-1,000 ml plus urine output — to prevent fluid overload between sessions.
Foods with over ~250-350 mg potassium per 100 g — the foods that push blood potassium toward dangerous levels in advanced CKD.
Nitrogen-free amino-acid precursors used with very-low-protein diets to prevent malnutrition in advanced non-dialysis CKD.
Foods with under ~200 mg potassium per 100 g — the safe building blocks of a renal diet.
Inorganic phosphorus added to processed foods — absorbed at nearly 100% and a hidden driver of high blood phosphorus.
A plant-forward eating pattern adapted to kidney budgets — lower phosphorus load and acid burden with potassium caution.
The daily potassium allowance a kidney patient can spend across meals and snacks.
The structured eating plan that controls potassium, phosphorus, sodium, protein, and fluid for kidney disease.
Indonesia's national health insurance — the dominant payer for dialysis services in Indonesia.
The Saudi Central Board for Accreditation of Healthcare Institutions — the national hospital accreditation framework.
The Indonesian Renal Registry — the national data source for dialysis and transplant epidemiology in Indonesia.
The Abu Dhabi government dialysis network — the reference public provider for kidney care in the UAE.
A single-celled parasite that causes cyclosporiasis — a prolonged diarrheal illness contracted from contaminated fresh produce, most often imported cilantro, raspberries, lettuce, and basil.
The intestinal infection caused by the parasite Cyclospora cayetanensis, marked by prolonged watery diarrhea after eating contaminated fresh produce.
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This content is a general reference, not medical advice, a diagnosis, or a treatment plan. Do not change your diet, fluids, medicines, or dialysis plan without your nephrologist or renal dietitian. Individual recommendations depend on your labs, medications, conditions, and care plan.