Diabetes Pathophysiology and Management
Expert-defined terms from the Professional Certificate in Diabetes Health Coaching Services course at London School of Planning and Management. Free to read, free to share, paired with a professional course.
ABG (Arterial Blood Gas) – Concept #
Measurement of oxygen, carbon dioxide, and pH in arterial blood. Related terms: PaO₂, PaCO₂, pH. Explanation: ABG provides insight into respiratory and metabolic status, which can affect glucose control. Example: A patient with diabetic ketoacidosis (DKA) may show low pH and low bicarbonate. Practical application: Use ABG results to guide insulin infusion rates and bicarbonate therapy. Challenges: Obtaining arterial samples can be painful; interpretation requires understanding of acid‑base physiology.
ADA (American Diabetes Association) – Concept #
Leading professional organization that publishes standards of care. Related terms: Standards of Care, Clinical Practice Guidelines. Explanation: The ADA issues evidence‑based recommendations for diagnosis, treatment, and education of diabetes. Example: The ADA 2024 guideline recommends metformin as first‑line therapy for type 2 diabetes unless contraindicated. Practical application: Coaches reference ADA guidelines when developing individualized care plans. Challenges: Keeping up‑to‑date with annual updates and translating recommendations into real‑world practice.
AGP (Ambulatory Glucose Profile) – Concept #
Visual summary of continuous glucose monitoring (CGM) data. Related terms: CGM, Time in Range, Glucose Variability. Explanation: AGP displays 24‑hour glucose patterns over days, highlighting periods of hypo‑ and hyperglycemia. Example: An AGP shows a post‑breakfast glucose spike consistently above 180 mg/dL. Practical application: Use AGP to identify target times for dietary or medication adjustments. Challenges: Requires sufficient CGM wear time; data overload may overwhelm some coaches.
Alpha‑Cell – Concept #
Pancreatic islet cell that secretes glucagon. Related terms: Beta‑cell, Delta‑cell, Islet of Langerhans. Explanation: Alpha‑cells increase blood glucose by stimulating hepatic glucose production. Example: In type 1 diabetes, unopposed alpha‑cell activity contributes to hyperglycemia during fasting. Practical application: Coaching strategies that include low‑glycemic meals can modulate glucagon surges. Challenges: Direct pharmacologic targeting of alpha‑cells is limited; lifestyle interventions have variable impact.
Amylin – Concept #
Peptide co‑secreted with insulin from beta‑cells. Related terms: Pramlintide, Satiety Hormone. Explanation: Amylin slows gastric emptying, suppresses glucagon, and promotes satiety. Example: Pramlintide, a synthetic amylin analog, reduces postprandial glucose excursions. Practical application: Educate patients on timing of pramlintide injections relative to meals. Challenges: Nausea is a common side effect; adherence may be low due to injection burden.
ANOVA (Analysis of Variance) – Concept #
Statistical method to compare means across groups. Related terms: T‑test, p‑value, Confidence Interval. Explanation: In diabetes research, ANOVA assesses differences in HbA1c among treatment arms. Example: An ANOVA shows a significant reduction in HbA1c for a lifestyle‑intervention group versus control (p < 0.01). Practical application: Coaches can interpret study results to recommend evidence‑based interventions. Challenges: Requires understanding of assumptions (normality, homogeneity) and proper post‑hoc testing.
APRI (Aspartate Aminotransferase–Platelet Ratio Index) – Concept #
Non‑invasive marker for liver fibrosis. Related terms: NAFLD, Fibrosis, Elastography. Explanation: Elevated APRI may indicate non‑alcoholic fatty liver disease (NAFLD), common in obesity‑related type 2 diabetes. Example: A patient with BMI = 32 kg/m² has an APRI = 1.2, Suggesting advanced fibrosis. Practical application: Incorporate APRI screening in metabolic risk assessments. Challenges: APRI lacks specificity; false positives may occur in other hepatic conditions.
Beta‑Cell – Concept #
Pancreatic islet cell responsible for insulin secretion. Related terms: Insulin, Glucose Stimulus, Beta‑Cell Dysfunction. Explanation: Beta‑cell mass and function decline progressively in type 2 diabetes, leading to relative insulin deficiency. Example: A fasting insulin level of 4 µU/mL with a glucose of 140 mg/dL indicates impaired beta‑cell response. Practical application: Coaches emphasize strategies that preserve beta‑cell health, such as weight loss and low‑glycemic diets. Challenges: Beta‑cell recovery is limited; once lost, regeneration is modest.
Beta‑Blocker – Concept #
Class of antihypertensive medication that blocks β‑adrenergic receptors. Related terms: Cardiovascular Risk, Hypoglycemia Unawareness. Explanation: Non‑selective beta‑blockers can mask hypoglycemia symptoms, complicating diabetes self‑management. Example: A patient on propranolol reports fewer tremors during insulin‑induced hypoglycemia. Practical application: Counsel patients to monitor glucose more frequently when on beta‑blockers. Challenges: Balancing cardiovascular benefits with potential glycemic risks.
BG (Blood Glucose) – Concept #
Concentration of glucose in peripheral blood. Related terms: SMBG, CGM, Glycemic Targets. Explanation: BG is the primary metric for day‑to‑day diabetes management. Example: A pre‑meal BG of 110 mg/dL falls within the ADA target range of 80‑130 mg/dL. Practical application: Use BG trends to adjust insulin dosing or carbohydrate intake. Challenges: Variability due to stress, illness, or measurement error.
BMI (Body Mass Index) – Concept #
Weight‑to‑height ratio used to classify obesity. Related terms: Obesity, Waist Circumference, Metabolic Syndrome. Explanation: BMI ≥ 30 kg/m² is a major risk factor for insulin resistance and type 2 diabetes. Example: A patient with BMI = 35 kg/m² is eligible for intensive lifestyle intervention. Practical application: Set weight‑loss goals (5‑10 % reduction) to improve insulin sensitivity. Challenges: BMI does not differentiate muscle from fat; ethnic‑specific cutoffs may be needed.
BNP (B‑type Natriuretic Peptide) – Concept #
Cardiac hormone released in response to ventricular stretch. Related terms: Heart Failure, Diabetic Cardiomyopathy. Explanation: Elevated BNP can signal heart failure, a common comorbidity in diabetes. Example: A diabetic patient with BNP = 450 pg/mL warrants echocardiographic evaluation. Practical application: Incorporate BNP screening in high‑risk diabetic populations. Challenges: Renal dysfunction can falsely elevate BNP levels.
CGM (Continuous Glucose Monitoring) – Concept #
Device that measures interstitial glucose continuously. Related terms: Sensor, Transmitter, Time in Range. Explanation: CGM provides real‑time glucose data, reducing reliance on fingersticks. Example: A CGM sensor shows a nocturnal glucose nadir of 55 mg/dL, prompting basal insulin adjustment. Practical application: Teach patients sensor placement, calibration (if required), and data interpretation. Challenges: Sensor cost, skin irritation, and data overload for some users.
CHD (Coronary Heart Disease) – Concept #
Atherosclerotic disease of coronary arteries. Related terms: Myocardial Infarction, Angina, ASCVD. Explanation: Diabetes triples the risk of CHD; aggressive risk‑factor control is essential. Example: A 55‑year‑old with HbA1c = 9 % and LDL‑C = 130 mg/dL has high CHD risk. Practical application: Incorporate statin therapy, aspirin, and lifestyle counseling into diabetes care plans. Challenges: Patient adherence to multiple preventive medications.
CKD (Chronic Kidney Disease) – Concept #
Progressive loss of renal function over months to years. Related terms: EGFR, Albuminuria, Diabetic Nephropathy. Explanation: Persistent hyperglycemia damages glomeruli, leading to CKD. Example: An eGFR of 45 mL/min/1.73 M² with albumin‑to‑creatinine ratio of 150 mg/g indicates stage 3 CKD. Practical application: Adjust medication doses (e.G., Metformin) and monitor renal function regularly. Challenges: Early CKD is often asymptomatic; patients may not perceive urgency.
CLIA (Clinical Laboratory Improvement Amendments) – Concept #
Regulatory standards for laboratory testing in the United States. Related terms: CAP, FDA, Point‑of‑Care Testing. Explanation: CLIA certification ensures accuracy of glucose meters used in home settings. Example: A point‑of‑care glucose meter must meet CLIA waived status for reliable results. Practical application: Verify that patient’s meter is CLIA‑approved before recommending it. Challenges: Rapidly evolving technology may outpace regulatory updates.
Co‑Morbidity – Concept #
Presence of additional diseases alongside diabetes. Related terms: Hypertension, Dyslipidemia, Depression. Explanation: Co‑morbid conditions increase complexity of management and risk of complications. Example: A patient with diabetes and depression may have poorer glycemic control due to reduced self‑care. Practical application: Conduct comprehensive assessments and coordinate multidisciplinary care. Challenges: Polypharmacy and competing priorities can reduce adherence.
Co‑treatment – Concept #
Simultaneous use of multiple therapeutic agents. Related terms: Combination Therapy, Polypharmacy, Synergy. Explanation: In type 2 diabetes, co‑treatment with metformin plus GLP‑1 receptor agonist improves glycemic control and weight loss. Example: Metformin + semaglutide reduces HbA1c by 1.5 % More than metformin alone. Practical application: Educate patients on injection techniques and potential side effects. Challenges: Cost and insurance coverage may limit access.
CTCAE (Common Terminology Criteria for Adverse Events) – Concept #
Standardized classification for reporting side effects. Related terms: Toxicity Grading, Safety Monitoring. Explanation: CTCAE grades hypoglycemia severity from grade 1 (mild) to grade 5 (death). Example: A grade 2 hypoglycemic event requires assistance but not hospitalization. Practical application: Use CTCAE to document adverse events in clinical trials or quality‑improvement projects. Challenges: Subjectivity in grading may vary among clinicians.
DKA (Diabetic Ketoacidosis) – Concept #
Acute metabolic emergency characterized by hyperglycemia, ketosis, and acidosis. Related terms: Hyperosmolar Hyperglycemic State, Insulin Deficiency, Anion Gap. Explanation: DKA results from absolute insulin deficiency, often in type 1 diabetes. Example: A patient presents with glucose = 550 mg/dL, serum bicarbonate = 12 mmol/L, and positive serum ketones. Practical application: Initiate fluid resuscitation, insulin infusion, and electrolyte replacement per protocol. Challenges: Delayed presentation, patient non‑adherence to insulin, and misdiagnosis in type 2 diabetes.
DL (Dextrose Load) – Concept #
Oral glucose challenge used in diagnostic testing. Related terms: OGTT, Fasting Plasma Glucose, 2‑Hour Glucose. Explanation: A 75‑g DL assesses glucose tolerance; a 2‑hour value ≥ 200 mg/dL confirms diabetes. Example: An OGTT shows a 2‑hour glucose of 210 mg/dL. Practical application: Use DL results to tailor dietary counseling and pharmacotherapy. Challenges: Requires patient fasting and time‑consuming clinic visits.
DM (Diabetes Mellitus) – Concept #
Chronic metabolic disorder characterized by hyperglycemia. Related terms: Type 1, Type 2, Gestational Diabetes. Explanation: DM results from insulin deficiency, insulin resistance, or both. Example: A 48‑year‑old with HbA1c = 8.2 % Meets diagnostic criteria for type 2 diabetes. Practical application: Develop individualized care plans incorporating lifestyle, medication, and monitoring. Challenges: Heterogeneity of disease progression and patient engagement.
DNA Methylation – Concept #
Epigenetic modification influencing gene expression. Related terms: Epigenetics, Gene Regulation, Metabolic Memory. Explanation: Aberrant DNA methylation of insulin‑signaling genes may predispose to type 2 diabetes. Example: Hypermethylation of the PPARGC1A promoter is linked to reduced mitochondrial function. Practical application: Emerging biomarkers may inform personalized risk stratification. Challenges: Clinical utility is still investigational; testing is costly.
DR (Diabetic Retinopathy) – Concept #
Microvascular complication affecting the retina. Related terms: Microaneurysms, Neovascularization, Vision Loss. Explanation: Prolonged hyperglycemia damages retinal capillaries, leading to leakage and proliferative disease. Example: Fundoscopic exam shows microaneurysms and dot‑blot hemorrhages, classifying non‑proliferative DR. Practical application: Schedule annual dilated eye exams and reinforce tight glycemic control. Challenges: Asymptomatic early stages may delay detection; access to ophthalmology can be limited.
DPP‑4 Inhibitor – Concept #
Oral agents that block dipeptidyl peptidase‑4 enzyme, prolonging incretin activity. Related terms: GLP‑1, Sitagliptin, Saxagliptin. Explanation: DPP‑4 inhibitors modestly lower HbA1c and have low hypoglycemia risk. Example: Sitagliptin 100 mg daily reduces HbA1c by 0.5 % In a patient already on metformin. Practical application: Consider DPP‑4 inhibitors for patients intolerant to GLP‑1 agonists. Challenges: Cost and modest efficacy compared with newer agents.
ECG (Electrocardiogram) – Concept #
Non‑invasive test recording cardiac electrical activity. Related terms: Ischemia, Arrhythmia, QT Interval. Explanation: Diabetes accelerates atherosclerosis, increasing the likelihood of silent ischemic changes on ECG. Example: A diabetic patient’s ECG shows ST‑segment depression suggestive of subclinical ischemia. Practical application: Use ECG as part of cardiovascular risk assessment in high‑risk diabetic cohorts. Challenges: Interpretation may require specialist input; false positives can cause anxiety.
EDC (Endocrine Disrupting Chemicals) – Concept #
Environmental substances that interfere with hormonal pathways. Related terms: Bisphenol A, Phthalates, Metabolic Syndrome. Explanation: Chronic exposure to EDCs may impair insulin signaling, contributing to obesity and diabetes. Example: Higher urinary BPA levels correlate with increased fasting insulin. Practical application: Counsel patients on reducing plastic food‑container use. Challenges: Evidence is associative; regulatory policies vary.
eGFR (Estimated Glomerular Filtration Rate) – Concept #
Calculation estimating kidney filtration capacity. Related terms: CKD, Serum Creatinine, MDRD Equation. Explanation: EGFR guides dosing of renally excreted diabetes medications. Example: EGFR = 58 mL/min/1.73 M² suggests dose reduction of empagliflozin. Practical application: Perform eGFR testing annually in diabetic patients. Challenges: Accuracy declines in extremes of body size and muscle mass.
ELI (Endocrine‑Liver‑Intestine Axis) – Concept #
Integrated network influencing glucose homeostasis. Related terms: Incretins, Hepatic Glucose Production, Bile Acids. Explanation: Hormones from the gut (GLP‑1) and liver (FGF‑21) modulate insulin sensitivity. Example: Post‑prandial GLP‑1 surge reduces hepatic glucose output. Practical application: Leverage this axis through dietary fiber and GLP‑1 agonist therapy. Challenges: Complex signaling pathways make targeted interventions difficult.
EMR (Electronic Medical Record) – Concept #
Digital version of a patient’s chart. Related terms: Health Information Exchange, Clinical Decision Support, Data Interoperability. Explanation: EMRs enable tracking of glucose trends, medication changes, and comorbidities. Example: An EMR alert flags a patient’s HbA1c > 9 % for care‑team review. Practical application: Use EMR dashboards to monitor population health metrics. Challenges: Provider burnout due to documentation burden; interoperability gaps.
ENaC (Epithelial Sodium Channel) – Concept #
Renal channel influencing sodium reabsorption. Related terms: Diuretics, Fluid Balance, Hypertension. Explanation: SGLT2 inhibitors indirectly affect ENaC activity, promoting natriuresis. Example: Empagliflozin leads to modest reduction in blood pressure via ENaC modulation. Practical application: Explain to patients the dual glucose‑lowering and blood‑pressure benefits of SGLT2 inhibitors. Challenges: Risk of volume depletion, especially in elderly patients.
FPG (Fasting Plasma Glucose) – Concept #
Glucose concentration after an overnight fast. Related terms: HbA1c, OGTT, Diagnostic Criteria. Explanation: FPG ≥ 126 mg/dL on two separate occasions confirms diabetes. Example: A patient’s FPG is 130 mg/dL, meeting diagnostic threshold. Practical application: Use FPG for screening in primary‑care settings. Challenges: Requires fasting; stress or acute illness may falsely elevate values.
GLP‑1 (Glucagon‑Like Peptide‑1) – Concept #
Incretin hormone that enhances insulin secretion and suppresses glucagon. Related terms: DPP‑4, Exenatide, Liraglutide. Explanation: GLP‑1 receptor agonists improve glycemic control, promote weight loss, and reduce cardiovascular events. Example: Liraglutide 1.8 Mg daily lowers HbA1c by 1.0 % And induces 4 kg weight loss. Practical application: Initiate GLP‑1 therapy in overweight patients inadequately controlled on metformin. Challenges: Gastrointestinal side effects; injection burden; insurance coverage.
Glycemic Index (GI) – Concept #
Ranking of carbohydrates based on post‑prandial glucose response. Related terms: Glycemic Load, Carbohydrate Counting, Low‑GI Diet. Explanation: Low‑GI foods produce slower glucose rises, aiding glycemic control. Example: A slice of whole‑grain bread (GI ≈ 55) versus white bread (GI ≈ 75). Practical application: Teach patients to select low‑GI foods for breakfast and snacks. Challenges: GI values vary with food preparation and individual digestion.
HbA1c (Hemoglobin A1c) – Concept #
Percentage of glycated hemoglobin reflecting average glucose over 2‑3 months. Related terms: Glycated Hemoglobin, Diabetes Control, Target Range. Explanation: HbA1c < 7 % is generally recommended for most adults; tighter targets may be set for selected patients. Example: A patient’s HbA1c decreased from 9.2 % To 7.4 % After lifestyle modification. Practical application: Use HbA1c trends to assess treatment efficacy and motivate behavior change. Challenges: Hemoglobinopathies, anemia, and recent transfusions can falsely alter results.
Hyperinsulinemia – Concept #
Elevated circulating insulin levels often due to insulin resistance. Related terms: Metabolic Syndrome, Obesity, Beta‑Cell Exhaustion. Explanation: Chronic hyperinsulinemia may precede overt diabetes and contribute to atherogenesis. Example: Fasting insulin of 28 µU/mL with normal glucose suggests insulin resistance. Practical application: Implement early lifestyle interventions to reduce insulin demand. Challenges: Measuring insulin is not routine; interpretation requires reference ranges.
Hyperlipidemia – Concept #
Elevated plasma lipids, commonly triglycerides and LDL‑C in diabetes. Related terms: Dyslipidemia, Statins, Cardiovascular Risk. Explanation: Diabetic dyslipidemia is characterized by high triglycerides, low HDL‑C, and small dense LDL particles. Example: Triglycerides = 250 mg/dL, HDL‑C = 35 mg/dL. Practical application: Initiate statin therapy per ADA guidelines and counsel on dietary fat reduction. Challenges: Patient adherence to lipid‑lowering medications and lifestyle changes.
ICD‑10 (International Classification of Diseases, 10th Revision) – Concep… #
Related terms: CPT, Billing, Reimbursement. Explanation: Accurate ICD‑10 coding for diabetes (E11.X) ensures appropriate reimbursement and data collection. Example: E11.9 Denotes type 2 diabetes without complications. Practical application: Train staff on proper code selection for diabetes encounters. Challenges: Frequent updates and specificity requirements can cause coding errors.
Insulin Sensitivity – Concept #
Degree to which cells respond to insulin. Related terms: HOMA‑IR, QUICKI, Metabolic Flexibility. Explanation: Higher insulin sensitivity means lower insulin needed for glucose uptake. Example: HOMA‑IR = 1.2 Indicates good sensitivity; values > 2 suggest resistance. Practical application: Use exercise and weight loss to improve sensitivity. Challenges: Quantifying sensitivity in routine practice is limited to surrogate indices.
Insulin Therapy – Concept #
Exogenous insulin administration to control hyperglycemia. Related terms: Basal‑Bolus Regimen, Rapid‑Acting Insulin, Long‑Acting Insulin. Explanation: Insulin replaces deficient endogenous insulin, essential in type 1 diabetes and advanced type 2 diabetes. Example: Basal insulin glargine 20 U nightly plus rapid‑acting insulin lispro before meals. Practical application: Educate patients on injection technique, dose titration, and hypoglycemia management. Challenges: Fear of injections, hypoglycemia risk, and cost.
ISF (Insulin Sensitivity Factor) – Concept #
Numeric value used to calculate insulin dose based on carbohydrate intake or correction. Related terms: Carb‑to‑Insulin Ratio, Correction Factor. Explanation: ISF = 1800 ÷ total daily insulin dose (TDID) for adults; guides how many mg/dL glucose will be lowered per unit insulin. Example: TDID = 50 U → ISF ≈ 36 mg/dL per unit. Practical application: Provide patients with ISF tables to self‑adjust insulin. Challenges: ISF may change with activity, illness, or hormonal fluctuations.
Ketoacidosis – Concept #
Metabolic state marked by elevated ketone bodies and acidosis. Related terms: DKA, Euglycemic DKA, SGLT2 Inhibitors. Explanation: SGLT2 inhibitors can precipitate euglycemic DKA, where glucose is modestly elevated. Example: Patient on dapagliflozin presents with glucose = 180 mg/dL, β‑hydroxybutyrate = 3 mmol/L, pH = 7.25. Practical application: Advise patients to stop SGLT2 inhibitors before surgery or prolonged fasting. Challenges: Recognizing euglycemic DKA requires awareness of atypical presentations.
LADA (Latent Autoimmune Diabetes in Adults) – Concept #
Slowly progressive autoimmune diabetes that presents in adulthood. Related terms: Type 1.5 Diabetes, GAD Antibodies, Beta‑Cell Decline. Explanation: LADA patients initially may be misdiagnosed as type 2 diabetes but later require insulin. Example: Adult with BMI = 23 kg/m², positive GAD‑65 antibodies, and declining C‑peptide over 12 months. Practical application: Screen for autoantibodies when atypical features appear. Challenges: Limited awareness among clinicians; delayed insulin initiation.
LDL‑C (Low‑Density Lipoprotein Cholesterol) – Concept #
Primary cholesterol carrier associated with atherosclerosis. Related terms: Statins, PCSK9 Inhibitors, ASCVD Risk. Explanation: Diabetes patients aim for LDL‑C < 100 mg/dL, < 70 mg/dL if high cardiovascular risk. Example: A patient on high‑intensity statin has LDL‑C = 68 mg/dL. Practical application: Monitor lipid panels every 3‑6 months and adjust therapy accordingly. Challenges: Statin intolerance and cost of newer agents.
Metabolic Memory – Concept #
Long‑lasting effects of early glycemic control on future complications. Related terms: DCCT, UKPDS, Epigenetics. Explanation: Early intensive therapy reduces microvascular complications even after HbA1c rises later. Example: DCCT follow‑up showed lower retinopathy rates in participants with prior tight control. Practical application: Emphasize early glycemic targets to patients newly diagnosed. Challenges: Patients diagnosed late may miss the “window” of metabolic memory.
Metformin – Concept #
First‑line oral antihyperglycemic agent that reduces hepatic glucose production. Related terms: Biguanide, GI Side Effects, B12 Deficiency. Explanation: Metformin improves insulin sensitivity and modestly promotes weight loss. Example: Starting metformin 500 mg BID reduces HbA1c by 1.2 % In many patients. Practical application: Counsel on taking metformin with meals to reduce GI upset. Challenges: Renal function limits use; lactic acidosis, though rare, is a concern.
Microalbuminuria – Concept #
Low‑level albumin excretion (30‑300 mg/24 h) indicating early kidney damage. Related terms: Albumin‑to‑Creatinine Ratio, Nephropathy, ACE Inhibitors. Explanation: Detectable microalbuminuria signals diabetic nephropathy onset. Example: Spot urine ACR = 45 mg/g confirms microalbuminuria. Practical application: Initiate ACE inhibitor or ARB therapy to slow progression. Challenges: Transient elevations due to exercise or infection may cause false positives.
Microvascular Complications – Concept #
Diabetes‑related damage to small vessels. Related terms: Retinopathy, Nephropathy, Neuropathy. Explanation: Hyperglycemia leads to endothelial dysfunction, basement membrane thickening, and tissue ischemia. Example: Patient develops peripheral neuropathy with loss of vibration sense. Practical application: Conduct annual foot exams, retinal screening, and urine albumin checks. Challenges: Early detection relies on routine screening; patients may be asymptomatic.
Mixed‑Meal Tolerance Test (MMTT) – Concept #
Assessment of post‑prandial glucose and insulin response using a standardized liquid meal. Related terms: OGTT, C‑Peptide, Beta‑Cell Function. Explanation: MMTT provides insight into incretin effect and beta‑cell reserve. Example: After MMTT, glucose peaks at 180 mg/dL and returns to < 130 mg/dL within 2 hours. Practical application: Use MMTT in research settings to evaluate novel therapies. Challenges: Time‑consuming; not routinely performed in clinical practice.
NGS (Next‑Generation Sequencing) – Concept #
High‑throughput DNA sequencing technology. Related terms: Genomics, Polygenic Risk Scores, Precision Medicine. Explanation: NGS can identify monogenic forms of diabetes (e.G., MODY). Example: Whole‑exome sequencing reveals HNF1A mutation confirming MODY3. Practical application: Tailor therapy (e.G., Sulfonylureas) based on genetic findings. Challenges: Cost, data interpretation, and limited insurance coverage.
Obesity – Concept #
Excess adipose tissue with BMI ≥ 30 kg/m². Related terms: Adiposity, Leptin, Weight Management. Explanation: Obesity drives insulin resistance, a core defect in type 2 diabetes. Example: A patient loses 10 % body weight, resulting in HbA1c reduction of 0.7 %. Practical application: Implement multidisciplinary weight‑loss programs, including diet, exercise, and behavioral counseling. Challenges: High relapse rates; socioeconomic barriers.
OGTT (Oral Glucose Tolerance Test) – Concept #
Diagnostic test measuring glucose response to a 75‑g glucose load. Related terms: Fasting Plasma Glucose, 2‑Hour Glucose, Impaired Glucose Tolerance. Explanation: A 2‑hour glucose ≥ 200 mg/dL confirms diabetes; 140‑199 mg/dL indicates impaired glucose tolerance. Example: Patient’s 2‑hour glucose is 165 mg/dL, classifying pre‑diabetes. Practical application: Use OGTT for high‑risk individuals or when HbA1c is inconclusive. Challenges: Requires fasting and 2‑hour clinic stay; glucose load may cause nausea.
PAI‑1 (Plasminogen Activator Inhibitor‑1) – Concept #
Fibrinolysis inhibitor elevated in insulin resistance. Related terms: Thrombosis, Metabolic Syndrome, Inflammation. Explanation: High PAI‑1 levels increase clot formation risk, contributing to cardiovascular events in diabetes. Example: PAI‑1 activity of 35 IU/mL exceeds normal range. Practical application: Aggressive control of weight and inflammation may lower PAI‑1. Challenges: Direct pharmacologic inhibition is not widely available.
PCOS (Polycystic Ovary Syndrome) – Concept #
Endocrine disorder associated with insulin resistance and hyperandrogenism. Related terms: Anovulation, Metabolic Syndrome, Hirsutism. Explanation: Women with PCOS have higher risk of developing type 2 diabetes. Example: A 28‑year‑old woman with BMI = 32 kg/m² and irregular menses has elevated fasting insulin. Practical application: Offer lifestyle counseling and consider metformin to improve insulin sensitivity. Challenges: Diagnostic criteria vary; patient adherence to weight‑loss recommendations can be low.
Pharmacogenomics – Concept #
Study of how genetic variation influences drug response. Related terms: CYP450, Precision Medicine, Drug‑Gene Interaction. Explanation: Certain polymorphisms affect metformin transport (e.G., OCT1) and may alter efficacy. Example: A patient with OCT1 loss‑of‑function variant shows reduced metformin response. Practical application: Use genetic testing to personalize medication selection. Challenges: Limited clinical guidelines; testing costs.
Pioglitazone – Concept #
Thiazolidinedione that activates PPAR‑γ to improve insulin sensitivity. Related terms: TZD, Fluid Retention, Bone Fracture Risk. Explanation: Pioglitazone lowers HbA1c but may cause weight gain and edema. Example: Adding pioglitazone 30 mg daily reduces HbA1c by 0.6 % In a patient with high insulin resistance. Practical application: Reserve for patients without heart failure and monitor for peripheral edema. Challenges: Concerns about bladder cancer risk and contraindication in heart failure.
Polydipsia – Concept #
Excessive thirst, a classic symptom of hyperglycemia. Related terms: Polyuria, Hyperglycemia, Osmotic Diuresis. Explanation: Elevated glucose leads to osmotic diuresis, triggering thirst. Example: A patient reports drinking 3 L of water daily, prompting glucose testing. Practical application: Use polydipsia as a screening clue for undiagnosed diabetes. Challenges: Similar symptoms occur in other conditions (e.G., Diabetes insipidus).
Postprandial Glucose – Concept #
Blood glucose level measured 1–2 hours after a meal. Related terms: OGTT, Glycemic Excursions, Time in Range. Explanation: Elevated postprandial glucose contributes to cardiovascular risk. Example: 2‑Hour post‑meal glucose of 190 mg/dL exceeds target < 180 mg/dL. Practical application: Adjust rapid‑acting insulin or consider GLP‑1 agonist to blunt spikes. Challenges: Requires patient to record meals accurately; variability due to meal composition.
Pre‑eclampsia – Concept #
Hypertensive disorder of pregnancy with proteinuria. Related terms: Gestational Diabetes, Placental Insufficiency, Eclampsia. Explanation: Women with pre‑eclampsia have increased long‑term diabetes risk. Example: A woman with prior pre‑eclampsia develops impaired fasting glucose 5 years later. Practical application: Recommend regular glucose screening postpartum. Challenges: Limited follow‑up compliance after delivery.
Pramlintide – Concept #
Synthetic amylin analog used as adjunct therapy. Related terms: Amylin, Injection, Weight Loss. Explanation: Pramlintide reduces postprandial glucose and promotes satiety, often leading to modest weight loss. Example: Pramlintide 60 µg before meals lowers 2‑hour glucose by 30 mg/dL. Practical application: Teach proper injection timing (within 15 minutes before meals). Challenges: Nausea, injection burden, and insurance coverage.
Proinsulin – Concept #
Insulin precursor released in higher proportions when beta‑cells are stressed. Related terms: C‑Peptide, Insulin Secretion, Beta‑Cell Dysfunction. Explanation: Elevated proinsulin-to‑insulin ratios indicate early beta‑cell failure. Example: Proinsulin = 25 pmol/L vs insulin = 10 µU/mL suggests impaired processing. Practical application: Use proinsulin measurement in research to identify high‑risk individuals. Challenges: Limited availability in routine labs.
QALY (Quality‑Adjusted Life Year) – Concept #
Metric combining quantity and quality of life for health economic analyses. Related terms: Cost‑Effectiveness, ICER, Health Technology Assessment. Explanation: Diabetes interventions are evaluated by cost per QALY gained. Example: An SGLT2 inhibitor yields 0.08 QALY improvement at $15,000 per QALY. Practical application: Inform payer decisions and prioritize cost‑effective therapies. Challenges: Assigning utility values to health states can be subjective.
RAAS (Renin‑Angiotensin‑Aldosterone System) – Concept #
Hormonal cascade regulating blood pressure and fluid balance. Related terms: ACE Inhibitors, ARBs, Sodium Retention. Explanation: RAAS blockade reduces progression of diabetic nephropathy. Example: Initiating lisinopril 10 mg daily slows eGFR decline. Practical application: Prescribe ACE/ARB in patients with microalbuminuria. Challenges: