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1,329 calculators and references across 60 specialties, with formula confidence shown up front.

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Kansas City Cardiomyopathy Questionnaire (KCCQ) Calculator

Kansas City Cardiomyopathy Questionnaire (KCCQ): Explanation and Clinical Context The KCCQ is a validated, patient-reported outcome measure assessing physical limitation, symptom frequency, quality of life, and social limitation in patients with heart failure. Scores range from 0 to 100, with higher scores indicating better health status and lower symptom burden. The Overall Summary Score is the average of the domain

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Kawasaki Disease Coronary Z-score Calculator

Kawasaki Disease Coronary Z-score: Explanation and Clinical Context The Kawasaki Disease Coronary Z-score is a standardized metric that quantifies coronary artery dilation relative to body surface area (BSA) in pediatric patients. It is calculated by comparing the measured coronary artery diameter to the predicted mean diameter for a given BSA, normalized by the standard deviation (SD) derived from population-based r

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Kawasaki Disease IVIG Resistance (Harada Variant) Calculator

Kawasaki Disease IVIG Resistance (Harada Variant): Explanation and Clinical Context The Harada score is a clinical prediction tool developed to identify patients with Kawasaki Disease (KD) who are at increased risk of resistance to intravenous immunoglobulin (IVIG) therapy. IVIG resistance occurs in approximately 10–20% of KD patients and is associated with persistent fever, prolonged inflammation, and higher risk of

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Kawashima Operation Survival Index Calculator

Kawashima Operation Survival Index: Explanation and Clinical Context The Kawashima Operation Survival Index is a risk prediction tool used to estimate long-term survival probability for patients undergoing the Kawashima procedure, typically for patients with single ventricle physiology and interrupted inferior vena cava with azygos continuation. It incorporates key clinical variables including age at surgery, preoper

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KCNQ1 KCNH2 Mutation Severity Classifier

KCNQ1 / KCNH2 Mutation Severity Classifier: background and clinical context This classifier synthesizes information about variant type (truncating vs missense vs CNV), protein location (pore, voltage sensor, transmembrane, regulatory domains), predicted functional effect (loss-of-function, dominant-negative, gain-of-function), and clinical phenotype (QTc duration, syncope, cardiac arrest, family sudden cardiac death)

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KDIGO Cardiovascular Comorbidity Risk Stratification Calculator

KDIGO Cardiovascular Comorbidity Risk Stratification: Explanation and Clinical Context The KDIGO cardiovascular comorbidity risk stratification framework integrates albuminuria and estimated glomerular filtration rate (eGFR) to assess cardiovascular risk in patients with chronic kidney disease (CKD). This approach emphasizes the importance of kidney function and albuminuria as significant factors influencing cardiova

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Khorana Score (Cancer-Associated Thrombosis) Calculator

Khorana Score: Explanation and Clinical Context The Khorana Score is a validated risk assessment model for predicting cancer-associated thrombosis (CAT) in ambulatory patients with cancer. It assigns points based on five clinical variables: site of cancer, platelet count > 350 ×10^9/L, hemoglobin < 10 g/dL or use of erythropoiesis-stimulating agents, leukocyte count > 11 ×10^9/L, and BMI > 35 kg/m². Scores classify p

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Kidney Damage Risk Index (KDRI-H) Calculator

Kidney Damage Risk Index in Hypertension (KDRI-H): Explanation and Clinical Context KDRI-H is a validated concept for estimating the risk of chronic kidney damage in patients with hypertension. It incorporates clinical and laboratory parameters such as age, systolic and diastolic blood pressure, estimated glomerular filtration rate (eGFR), and proteinuria. The index allows clinicians to stratify patients into low, mo

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Killip Classification Severity Tool for ACS

Killip Classification Severity Tool for Acute Coronary Syndrome: Explanation and Clinical Context The Killip classification is a bedside clinical scale that grades the severity of heart failure in the setting of acute myocardial infarction and acute coronary syndrome using simple physical examination findings including pulmonary rales third heart sound jugular venous pressure acute pulmonary edema and cardiogenic sho

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Kocher Criteria Septic Arthritis Calculator

Kocher Criteria for Septic Arthritis Explanation and Clinical Context Kocher Criteria were developed to help clinicians estimate the likelihood of septic arthritis in children presenting with acute hip pain. The system uses four clinical predictors which are history of fever inability to bear weight erythrocyte sedimentation rate above forty mm per hour and serum white blood cell count above twelve thousand per micro

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KOOS Knee Outcome Score Calculator

KOOS Knee Outcome Score Explanation and Clinical Context The Knee injury and Osteoarthritis Outcome Score is a validated multidimensional instrument that evaluates patient perceived knee health across five subscales. These domains include pain symptoms daily living function sport and recreation function and knee related quality of life. Each subscale is transformed to a zero to one hundred scale in which one hundred