Critical Lab Values and Normal Ranges
Knowing normal lab values and when to notify the provider is fundamental to nursing practice. These cards cover the most critical values tested on the NCLEX and checked daily in clinical settings.
Electrolytes and Cardiac Function
Sodium (Na+) normal range is 136-145 mEq/L. Low sodium (hyponatremia) causes confusion, seizures, and nausea. High sodium (hypernatremia) causes thirst, dry mucous membranes, and restlessness. Correct sodium slowly to avoid serious complications.
Potassium (K+) normal range is 3.5-5.0 mEq/L and affects cardiac rhythm directly. Low potassium causes muscle weakness, cramps, and dangerous arrhythmias. High potassium causes tall peaked T waves, bradycardia, and can lead to cardiac arrest. Never give potassium as an IV bolus.
Calcium (Ca2+) normal range is 9.0-10.5 mg/dL. Low calcium causes Trousseau sign (carpal spasm), Chvostek sign (facial twitch), tetany, and seizures. High calcium causes muscle weakness, constipation, and kidney stones. Calcium has an inverse relationship with phosphorus.
Magnesium (Mg2+) normal range is 1.3-2.1 mEq/L. Low magnesium causes tremors, seizures, and arrhythmias similar to low calcium. High magnesium causes respiratory depression, hypotension, and loss of deep tendon reflexes. IV magnesium sulfate treats preeclampsia but requires toxicity monitoring.
Blood Glucose and Metabolic Values
Blood Glucose normal fasting is 70-100 mg/dL. Hypoglycemia below 70 causes shakiness, confusion, diaphoresis, and tachycardia. Use the Rule of 15: give 15g fast-acting carbs and recheck in 15 minutes. Hyperglycemia above 250 causes polyuria, polydipsia, and polyphagia. DKA (diabetic ketoacidosis) is an emergency with blood glucose above 300 and pH below 7.35.
HbA1c normal is below 5.7%, prediabetes is 5.7-6.4%, and diabetes diagnosis is 6.5% or higher. This test reflects average blood glucose over 2-3 months and does not require fasting. Each 1% change equals roughly 30 mg/dL change in average glucose.
Kidney and Liver Function
BUN and Creatinine show kidney function. Normal BUN is 10-20 mg/dL and normal creatinine is 0.7-1.3 mg/dL. When both are elevated, kidney impairment is present. The normal BUN to creatinine ratio is 10:1 to 20:1. Creatinine is more specific for actual kidney damage.
Liver Function Tests include AST (10-40 U/L), ALT (7-56 U/L), and bilirubin (0.1-1.0 mg/dL). ALT is more specific for liver damage. Albumin normal is 3.5-5.0 g/dL and low albumin indicates malnutrition or liver disease. Low albumin causes edema from decreased oncotic pressure.
Red Blood Cells and Clotting
Hemoglobin (Hgb) normal is 14-18 g/dL for males and 12-16 g/dL for females. Low hemoglobin causes anemia with fatigue, pallor, tachycardia, and dyspnea. Transfuse typically when hemoglobin is below 7 g/dL or when the patient shows symptoms.
WBC (White Blood Cells) normal is 5,000-10,000 per mm3. High counts (leukocytosis) suggest infection or inflammation. Low counts (leukopenia) indicate immunosuppression. Neutropenia below 1,500 neutrophils requires neutropenic precautions: no fresh flowers, no raw foods, strict hand hygiene, and private room when possible.
Platelets normal is 150,000-400,000 per mm3. Low platelets (thrombocytopenia) below 150,000 increase bleeding risk. Below 50,000, avoid invasive procedures. Below 20,000, spontaneous bleeding is possible. Institute bleeding precautions: soft toothbrush, electric razor, no IM injections, and avoid aspirin and NSAIDs.
INR and PT monitor warfarin effectiveness. Normal INR is 0.8-1.1, and therapeutic on warfarin is 2.0-3.0 (2.5-3.5 for mechanical valve). PT normal is 11-13.5 seconds. The antidote is Vitamin K. Teach patients to maintain consistent Vitamin K intake.
Cardiac and Arterial Blood Gas
Troponin normal is below 0.04 ng/mL and indicates myocardial injury or infarction. It rises 4-6 hours after MI and peaks at 12-24 hours. Troponin is the most specific cardiac biomarker. Serial troponins show trends and confirm MI.
ABG Interpretation requires checking four values in order. Normal pH is 7.35-7.45, normal PaCO2 is 35-45 mmHg, and normal HCO3 is 22-26 mEq/L. First check pH to determine if acidosis (below 7.35) or alkalosis (above 7.45) is present. Then identify the primary cause (respiratory or metabolic) by checking PaCO2 and HCO3. Use ROME: Respiratory Opposite, Metabolic Equal to determine if compensation is appropriate.
| Term | Meaning |
|---|---|
| Sodium (Na+) | Normal: 136-145 mEq/L. Hyponatremia (<136): confusion, seizures, nausea. Causes: SIADH, fluid overload, diuretics. Hypernatremia (>145): thirst, dry mucous membranes, restlessness. Causes: dehydration, diabetes insipidus. Correct slowly to avoid cerebral edema or central pontine myelinolysis. |
| Potassium (K+) | Normal: 3.5-5.0 mEq/L. CRITICAL value, affects cardiac function. Hypokalemia (<3.5): muscle weakness, cramps, arrhythmias (flattened T waves, U waves). Causes: diuretics, vomiting. Hyperkalemia (>5.0): tall peaked T waves, bradycardia, cardiac arrest. Causes: renal failure, ACE inhibitors. Never give IV potassium as a bolus push. |
| Blood Glucose | Fasting normal: 70-100 mg/dL. Hypoglycemia (<70): shakiness, confusion, diaphoresis, tachycardia. Treat with 15g fast-acting carbs, recheck in 15 min (Rule of 15). Hyperglycemia (>250): polyuria, polydipsia, polyphagia. DKA: blood glucose >300, pH <7.35, ketones present. Emergency. |
| Hemoglobin (Hgb) | Normal: Male 14-18 g/dL, Female 12-16 g/dL. Low: anemia (fatigue, pallor, tachycardia, dyspnea). Causes: iron deficiency, chronic disease, blood loss. Transfuse typically when <7 g/dL (or symptomatic). High: polycythemia, dehydration. |
| WBC (White Blood Cells) | Normal: 5,000-10,000/mm3. Leukocytosis (>10,000): infection, inflammation, leukemia. Leukopenia (<5,000): immunosuppression, chemotherapy. Neutropenia (<1,500 neutrophils): high infection risk, institute neutropenic precautions (no fresh flowers, no raw foods, hand hygiene, private room). |
| Platelets | Normal: 150,000-400,000/mm3. Thrombocytopenia (<150,000): bleeding risk. <50,000: avoid invasive procedures. <20,000: spontaneous bleeding risk. Institute bleeding precautions: soft toothbrush, electric razor, no IM injections, avoid aspirin/NSAIDs. |
| INR / PT | Normal INR: 0.8-1.1. Therapeutic on warfarin: 2.0-3.0 (mechanical valve: 2.5-3.5). PT normal: 11-13.5 seconds. Monitors extrinsic pathway (warfarin effectiveness). Elevated: bleeding risk, hold warfarin. Antidote: Vitamin K (phytonadione). Teach patient to maintain consistent Vitamin K intake. |
| BUN and Creatinine | BUN normal: 10-20 mg/dL. Creatinine normal: 0.7-1.3 mg/dL. Elevated together: renal impairment. BUN elevated alone: dehydration, GI bleeding, high protein diet. Creatinine is more specific for kidney function. BUN:Creatinine ratio normally 10:1-20:1. |
| ABG Interpretation | pH 7.35-7.45, PaCO2 35-45 mmHg, HCO3 22-26 mEq/L. Steps: (1) Check pH (acidosis <7.35, alkalosis >7.45). (2) Check PaCO2 (respiratory). (3) Check HCO3 (metabolic). (4) Determine compensation. ROME: Respiratory Opposite, Metabolic Equal (relationship of pH to the primary disorder). |
| Calcium (Ca2+) | Normal: 9.0-10.5 mg/dL (total), 4.5-5.5 mg/dL (ionized). Hypocalcemia: Trousseau sign (carpal spasm with BP cuff), Chvostek sign (facial twitch), tetany, seizures. Hypercalcemia: muscle weakness, constipation, kidney stones, confusion. Inverse relationship with phosphorus. |
| Magnesium (Mg2+) | Normal: 1.3-2.1 mEq/L. Low: tremors, seizures, arrhythmias, similar to hypocalcemia. Often accompanies hypokalemia. High: respiratory depression, hypotension, loss of deep tendon reflexes. IV magnesium sulfate used for preeclampsia, monitor for toxicity. |
| Albumin | Normal: 3.5-5.0 g/dL. Low albumin indicates malnutrition, liver disease, or nephrotic syndrome. Leads to edema (decreased oncotic pressure). Important for evaluating nutritional status. Also affects drug binding, low albumin increases free drug levels. |
| Troponin | Normal: <0.04 ng/mL (varies by lab). Elevated troponin indicates myocardial injury/infarction. Most specific cardiac biomarker. Rises 4-6 hours after MI, peaks at 12-24 hours. Serial troponins drawn to detect trends. Also elevated in PE, myocarditis, renal failure. |
| HbA1c | Normal: <5.7%. Prediabetes: 5.7-6.4%. Diabetes: >=6.5%. Goal for most diabetic patients: <7%. Reflects average blood glucose over past 2-3 months (RBC lifespan). Does not require fasting. Each 1% change equals ~30 mg/dL change in average glucose. |
| Liver Function Tests (LFTs) | AST normal: 10-40 U/L. ALT normal: 7-56 U/L. ALT is more specific for liver damage. Both elevated in hepatitis, cirrhosis, drug toxicity. Bilirubin total normal: 0.1-1.0 mg/dL. Elevated = jaundice (>2.5 mg/dL). Alkaline phosphatase elevated in bile duct obstruction and bone disease. |
| Thyroid Function | TSH normal: 0.4-4.0 mIU/L. T3/T4 (active hormones). Hypothyroidism: high TSH, low T3/T4 (fatigue, weight gain, cold intolerance, bradycardia). Hyperthyroidism: low TSH, high T3/T4 (weight loss, heat intolerance, tachycardia, exophthalmos). TSH and thyroid hormones have inverse relationship. |
Common Medications and Nursing Considerations
Pharmacology is one of the most challenging areas of nursing education. These cards focus on frequently prescribed medications and their critical nursing implications. Master the mechanism, side effects, and what to monitor for each drug.
Cardiovascular Medications
Lisinopril is an ACE inhibitor used for hypertension, heart failure, and diabetic nephropathy. It blocks angiotensin-converting enzyme to reduce blood pressure. The most common side effect is a persistent dry cough, which may require switching to an ARB. Serious adverse effect: angioedema (face and throat swelling) requires immediate discontinuation. Monitor potassium levels because ACE inhibitors can cause hyperkalemia. Contraindicated in pregnancy.
Metoprolol is a beta-blocker that treats hypertension, heart failure, post-MI, and atrial fibrillation. It decreases heart rate, blood pressure, and myocardial oxygen demand. Hold the dose if heart rate is below 60 bpm or systolic BP is below 100 mmHg. Do not stop abruptly as rebound tachycardia can occur. Use cautiously in patients with asthma or COPD because beta-2 blockade can trigger bronchospasm.
Amlodipine is a calcium channel blocker for hypertension and angina. It relaxes vascular smooth muscle to reduce blood pressure. Common side effects include peripheral edema, dizziness, flushing, and headache. Avoid grapefruit juice because it increases drug levels. Onset is gradual, so it is not appropriate for hypertensive emergencies.
Digoxin is a cardiac glycoside for heart failure and atrial fibrillation. It increases heart contractility and decreases heart rate. Check the apical pulse for a full minute before giving. Hold if heart rate is below 60 bpm. This drug has a narrow therapeutic index (0.5-2.0 ng/mL). Toxicity signs include visual disturbances (yellow-green halos), nausea, bradycardia, and arrhythmias. Hypokalemia increases toxicity risk.
Anticoagulants
Warfarin inhibits Vitamin K-dependent clotting factors and requires INR monitoring. Therapeutic goal is typically 2.0-3.0 (2.5-3.5 for mechanical heart valves). It takes 3-5 days for full effect, so use heparin bridge during initiation. The antidote is Vitamin K (phytonadione). Many drug and food interactions exist, so teach patients consistent Vitamin K intake. Warfarin is teratogenic and contraindicated in pregnancy.
Heparin provides immediate anticoagulation via IV or SubQ routes. Monitor aPTT with goal 1.5-2.5 times normal. The antidote is protamine sulfate. Risk of HIT (heparin-induced thrombocytopenia) requires platelet monitoring. Never give heparin IM. For SubQ dosing, rotate sites and do not massage. LMWH (enoxaparin) has more predictable kinetics, does not require routine aPTT, and is safer for SubQ use.
Enoxaparin is a low molecular weight heparin for DVT prophylaxis and treatment. Give SubQ in the abdomen only. Do not expel the air bubble from the syringe. Do not massage the injection site. Do not require aPTT monitoring in most patients. Monitor anti-Xa levels in patients with renal impairment. Protamine provides partial reversal if bleeding occurs.
Diabetes and Endocrine Medications
Metformin is the first-line medication for Type 2 diabetes. It decreases hepatic glucose production and increases insulin sensitivity. It does not cause hypoglycemia when used alone. Hold it before contrast dye procedures due to the risk of lactic acidosis, especially in patients with renal impairment. Side effects include GI upset and diarrhea. Contraindicated when eGFR is below 30.
Insulin Types and Timing vary by formulation. Rapid-acting (lispro, aspart) has onset 15 minutes, peak 1-2 hours, and is given with meals. Short-acting (regular) has onset 30 minutes, peak 2-4 hours, and is the only insulin that can be given IV. Intermediate (NPH) has onset 2 hours, peak 4-12 hours, and appears cloudy. Long-acting (glargine) has onset 1 hour, no peak, lasts 24 hours, and is clear. Never mix long-acting insulins. Always check blood glucose before giving insulin. Hypoglycemia is the most dangerous side effect.
Levothyroxine replaces thyroid hormone in hypothyroidism. Take on an empty stomach 30-60 minutes before breakfast. Many drug interactions exist, so separate from calcium, iron, and antacids by 4 hours. Monitor TSH (should decrease with treatment). Side effects of overtreatment mimic hyperthyroidism: tachycardia, weight loss, anxiety, and insomnia.
Respiratory and GI Medications
Albuterol is a short-acting beta-2 agonist bronchodilator for acute asthma and COPD exacerbations. Onset is 5-15 minutes. Side effects include tachycardia, tremor, and hypokalemia. When using with inhaled corticosteroids, give albuterol first to open airways for better steroid penetration. Using it more than twice weekly suggests poorly controlled asthma.
Omeprazole is a proton pump inhibitor for GERD, peptic ulcers, and Zollinger-Ellison syndrome. Take 30 minutes before the first meal. Long-term risks include C. difficile infection, osteoporosis (from decreased calcium absorption), hypomagnesemia, and vitamin B12 deficiency. Avoid long-term use when possible.
Antibiotics
Ciprofloxacin is a fluoroquinolone antibiotic for UTIs, respiratory infections, and GI infections. Black box warnings include tendon rupture (especially Achilles), peripheral neuropathy, and CNS effects. Avoid in children and pregnant women. Do not take with dairy, calcium, or antacids because they decrease absorption. Increase fluid intake. Photosensitivity can occur.
Pain and Anti-inflammatory Medications
Morphine is an opioid analgesic for severe pain, acute MI, and pulmonary edema. Respiratory depression is the most dangerous side effect. Other side effects include constipation, sedation, hypotension, and nausea. Monitor respiratory rate and hold if below 12 breaths per minute. Naloxone (Narcan) is the antidote. Assess pain before and after administration. High abuse potential requires careful monitoring.
Prednisone is a corticosteroid with anti-inflammatory and immunosuppressant effects. It treats asthma, autoimmune diseases, allergic reactions, and organ rejection. Side effects include hyperglycemia, immunosuppression, osteoporosis, weight gain, mood changes, and Cushing syndrome with long-term use. Never stop abruptly after prolonged use (adrenal crisis risk). Taper slowly. Monitor blood glucose.
| Term | Meaning |
|---|---|
| Metformin (Glucophage) | First-line for Type 2 diabetes. Decreases hepatic glucose production, increases insulin sensitivity. Does NOT cause hypoglycemia when used alone. Hold before contrast dye procedures (risk of lactic acidosis, especially with renal impairment). Side effects: GI upset, diarrhea. Monitor renal function. Contraindicated: eGFR <30. |
| Lisinopril (ACE Inhibitor) | Antihypertensive, also used for heart failure and diabetic nephropathy. Blocks angiotensin-converting enzyme. Common side effect: persistent dry cough (switch to ARB if intolerable). Serious: angioedema (swelling of face/throat, discontinue immediately). Monitor potassium (can cause hyperkalemia). Contraindicated in pregnancy. |
| Metoprolol (Beta-Blocker) | Treats hypertension, heart failure, post-MI, atrial fibrillation. Blocks beta-1 receptors: decreases heart rate, blood pressure, and myocardial oxygen demand. Hold if HR <60 or SBP <100. Side effects: bradycardia, fatigue, depression, bronchospasm. Do NOT stop abruptly (rebound tachycardia). Use cautiously in asthma/COPD (beta-2 blockade). |
| Warfarin (Coumadin) | Anticoagulant that inhibits Vitamin K-dependent clotting factors (II, VII, IX, X). Monitor INR (goal 2.0-3.0). Takes 3-5 days for full effect (bridge with heparin). Antidote: Vitamin K. Many drug and food interactions. Teach: consistent Vitamin K intake, report bleeding, avoid NSAIDs and alcohol. Teratogenic. |
| Heparin | Anticoagulant, immediate onset (IV or SubQ). Monitor aPTT (goal 1.5-2.5x normal). Antidote: protamine sulfate. Risk: HIT (heparin-induced thrombocytopenia), monitor platelets. Never give IM. SubQ: rotate sites, do not massage. LMWH (enoxaparin): more predictable, monitor anti-Xa levels, no routine aPTT needed. |
| Furosemide (Lasix) | Loop diuretic. Treats edema (heart failure, cirrhosis, renal disease) and hypertension. Blocks Na/K/Cl cotransporter in loop of Henle. Side effects: hypokalemia, dehydration, ototoxicity (especially with aminoglycosides), hypomagnesemia. Monitor: K+, Na+, intake/output, daily weights. Give in the morning to avoid nocturia. |
| Insulin, Types and Timing | Rapid-acting (lispro/aspart): onset 15 min, peak 1-2 hr, give with meals. Short-acting (regular): onset 30 min, peak 2-4 hr, only insulin given IV. Intermediate (NPH): onset 2 hr, peak 4-12 hr, cloudy. Long-acting (glargine): onset 1 hr, no peak, 24 hr, clear, NEVER mix. Always check blood glucose before giving. Hypoglycemia is most dangerous side effect. |
| Levothyroxine (Synthroid) | Thyroid hormone replacement for hypothyroidism. Take on empty stomach, 30-60 minutes before breakfast. Many drug interactions (separate from calcium, iron, antacids by 4 hours). Monitor TSH (should decrease with treatment). Side effects of overtreatment mimic hyperthyroidism: tachycardia, weight loss, anxiety, insomnia. |
| Albuterol (ProAir, Ventolin) | Short-acting beta-2 agonist bronchodilator. Rescue inhaler for acute asthma/COPD exacerbations. Onset 5-15 minutes. Side effects: tachycardia, tremor, hypokalemia. If using with inhaled corticosteroid, give albuterol FIRST (opens airways for steroid to reach deeper). Overuse (>2x/week) suggests poorly controlled asthma. |
| Morphine | Opioid analgesic for severe pain, acute MI, pulmonary edema. Side effects: respiratory depression (most dangerous), constipation, sedation, hypotension, nausea. Monitor respiratory rate (hold if <12/min). Antidote: naloxone (Narcan). Assess pain before and after administration. High abuse potential. |
| Digoxin (Lanoxin) | Cardiac glycoside for heart failure and atrial fibrillation. Increases contractility, decreases heart rate. Narrow therapeutic index (0.5-2.0 ng/mL). Check apical pulse for full minute before giving, hold if <60 bpm. Toxicity signs: visual disturbances (yellow-green halos), nausea, bradycardia, arrhythmias. Hypokalemia increases toxicity risk. |
| Prednisone (Corticosteroid) | Anti-inflammatory and immunosuppressant. Treats asthma, autoimmune diseases, allergic reactions, organ rejection. Side effects: hyperglycemia, immunosuppression, osteoporosis, weight gain, mood changes, Cushing syndrome (long-term). NEVER stop abruptly after long-term use (adrenal crisis). Taper slowly. Monitor blood glucose. |
| Amlodipine (Norvasc) | Calcium channel blocker for hypertension and angina. Relaxes vascular smooth muscle, reducing blood pressure. Side effects: peripheral edema, dizziness, flushing, headache. Monitor blood pressure. Do not give with grapefruit juice (increases drug levels). Onset is gradual, not for hypertensive emergencies. |
| Omeprazole (Prilosec) | Proton pump inhibitor (PPI). Treats GERD, peptic ulcers, Zollinger-Ellison syndrome. Suppresses gastric acid secretion. Take 30 minutes before first meal. Long-term risks: C. difficile infection, osteoporosis (decreased calcium absorption), hypomagnesemia, vitamin B12 deficiency. Avoid long-term use when possible. |
| Ciprofloxacin (Fluoroquinolone) | Broad-spectrum antibiotic for UTIs, respiratory infections, GI infections. Black box warnings: tendon rupture (especially Achilles), peripheral neuropathy, CNS effects. Avoid in children and pregnant women. Do not take with dairy, calcium, or antacids (decreased absorption). Increase fluid intake. Photosensitivity. |
| Enoxaparin (Lovenox) | Low molecular weight heparin. DVT prophylaxis and treatment. SubQ injection only (abdomen). Do NOT expel air bubble. Do NOT massage site. Does not require routine aPTT monitoring. Monitor anti-Xa levels in renal impairment. Contraindicated: active major bleeding, HIT. Antidote: protamine (partially effective). |
Major Conditions, Assessment and Interventions
Nursing care requires rapid recognition of conditions and appropriate intervention. These cards cover the most commonly tested conditions across major body systems with priority assessments and interventions.
Cardiac and Vascular Conditions
Heart Failure occurs when the heart cannot pump effectively. Left-sided heart failure causes pulmonary congestion with dyspnea, crackles, orthopnea, and pink frothy sputum. Right-sided heart failure causes systemic congestion with peripheral edema, JVD, hepatomegaly, and weight gain. Monitor daily weights (1 kg equals 1L fluid), intake and output, and lung sounds. Medications include ACE inhibitors, beta-blockers, and diuretics. Restrict sodium to less than 2g per day and limit fluids.
Myocardial Infarction occurs when a blocked coronary artery causes heart muscle death. Signs include crushing chest pain (may radiate to arm or jaw), diaphoresis, nausea, and dyspnea. Women may present atypically with fatigue or back pain. Use MONA: Morphine, Oxygen (if SpO2 below 94%), Nitroglycerin, Aspirin. Obtain 12-lead ECG within 10 minutes. Check troponin levels. Perform PCI (stent) within 90 minutes or administer thrombolytics within 30 minutes.
Deep Vein Thrombosis is a blood clot in a deep vein, usually in the leg. Signs include unilateral leg swelling, warmth, redness, and pain. Risk factors are immobility, surgery, cancer, pregnancy, and oral contraceptives. Diagnosis uses D-dimer and duplex ultrasound. Treatment involves anticoagulation with heparin bridge to warfarin or direct oral anticoagulants. Prevention includes early ambulation, sequential compression devices, and prophylactic anticoagulation. Risk of pulmonary embolism increases if the clot dislodges.
Pulmonary Embolism occurs when a blood clot lodges in a pulmonary artery. Signs include sudden dyspnea, tachycardia, pleuritic chest pain, hemoptysis, and anxiety. ABGs show respiratory alkalosis initially from hyperventilation. CT angiography is the gold standard for diagnosis. Treatment involves anticoagulation, thrombolytics for massive PE, and embolectomy if needed. Prevention requires treating and preventing DVT.
Respiratory Conditions
Pneumonia is a lung infection from bacterial, viral, or fungal organisms. Signs include fever, productive cough, crackles on auscultation, dyspnea, tachypnea, and pleuritic chest pain. Nursing interventions include incentive spirometry, positioning the head of bed elevated, encouraging fluids, and administering antibiotics as ordered. Obtain sputum culture before the first antibiotic dose. Prevent aspiration in at-risk patients. Administer pneumococcal and influenza vaccines for prevention.
COPD includes chronic bronchitis and emphysema with progressive airflow limitation. Signs include barrel chest, pursed-lip breathing, dyspnea on exertion, and chronic cough. Use low-flow oxygen at 1-2 L per minute because COPD patients rely on hypoxic drive. Medications include bronchodilators (albuterol, tiotropium) and inhaled corticosteroids. Teach smoking cessation, breathing techniques, energy conservation, and vaccinations.
Endocrine Conditions
Diabetic Ketoacidosis is a life-threatening complication of Type 1 diabetes from insulin deficiency. It causes hyperglycemia, ketone production, and metabolic acidosis. Signs include blood glucose above 300, pH below 7.35, Kussmaul respirations (deep rapid breathing), fruity breath, and dehydration. Treatment includes IV fluids (normal saline first), insulin drip, and potassium replacement. Check K+ before giving insulin because insulin drives K+ into cells. Monitor glucose hourly.
Thyroid Storm is a life-threatening exacerbation of hyperthyroidism. Triggers include infection, surgery, and trauma in uncontrolled hyperthyroidism. Signs include fever above 104 degrees F, extreme tachycardia, agitation, and delirium. Treatment includes beta-blockers (propranolol), PTU or methimazole (block hormone synthesis), iodine (given after antithyroid meds), and glucocorticoids. Cooling measures and ICU admission are necessary.
Neurological Conditions
Stroke is either ischemic (87%, blood clot) or hemorrhagic (13%, bleeding). Use FAST to recognize signs: Facial drooping, Arm weakness, Speech difficulty. Time is critical because ischemic stroke treatment with tPA works within 3-4.5 hours of symptom onset. CT scan rules out hemorrhage first. Nursing care includes neuro checks every 15-30 minutes, keeping head of bed flat (ischemic) or elevated 30 degrees (hemorrhagic), NPO status until swallow evaluation, and fall prevention.
Kidney and Fluid Conditions
Chronic Kidney Disease is progressive loss of kidney function with GFR below 60 for 3 or more months. Complications include fluid overload, hyperkalemia, anemia (from decreased erythropoietin), metabolic acidosis, and osteodystrophy (calcium and phosphorus imbalance). Diet restricts protein, potassium, phosphorus, sodium, and fluids. Medications include phosphate binders, erythropoietin, and iron supplements. Dialysis begins when GFR drops below 15.
Maternal and Surgical Conditions
Preeclampsia is a pregnancy complication after 20 weeks with blood pressure 140/90 or higher plus proteinuria or other organ dysfunction. Severe features include BP 160/110 or higher, thrombocytopenia, liver enzyme elevation, renal insufficiency, pulmonary edema, and visual or cerebral symptoms. Treatment includes magnesium sulfate (prevents seizures; monitor for toxicity by checking DTRs and respiratory rate; calcium gluconate is the antidote) and antihypertensives. Delivery is the definitive treatment.
Compartment Syndrome is increased pressure within a muscle compartment that compromises circulation and nerve function. Recognize the 5 P's: Pain (out of proportion, worsens with passive stretch), Pressure (tense compartment), Paresthesia, Pallor, Pulselessness (late sign). This is an emergency requiring immediate surgeon notification. Remove restrictive dressings and casts. Do not elevate above heart because that decreases perfusion. Fasciotomy is the treatment.
Burns and Rule of Nines estimates total body surface area burned. Adults: head 9%, each arm 9%, anterior trunk 18%, posterior trunk 18%, each leg 18%, perineum 1%. Use Parkland formula for fluid resuscitation: 4 mL times kg times percent TBSA burned (give half in first 8 hours from burn time). Monitor urine output with target 0.5-1 mL per kg per hour. Assess airway (singed nasal hairs, hoarse voice indicate inhalation injury). Infection prevention becomes priority after initial stabilization.
Infection and Metabolic Emergencies
Sepsis is life-threatening organ dysfunction from dysregulated infection response. Use qSOFA criteria: altered mental status, systolic BP 100 or lower, respiratory rate 22 or higher. The sepsis bundle within hour one includes: obtain lactate, blood cultures before antibiotics, administer broad-spectrum antibiotics, begin IV fluids (30 mL per kg crystalloid), and apply vasopressors if hypotensive after fluids. Monitor urine output targeting more than 0.5 mL per kg per hour. Early recognition saves lives.
Addisonian Crisis is acute adrenal insufficiency and life-threatening. Causes include abrupt steroid withdrawal and stress in Addison's disease patients. Signs include hypotension, shock, hyperkalemia, hyponatremia, and hypoglycemia. Treatment includes IV hydrocortisone (stress dose), IV fluids (normal saline), and treating hyperkalemia. Prevention requires never abruptly discontinuing steroids after long-term use. Teach patients about stress dosing.
Hypoglycemia in Diabetes occurs when blood glucose drops below 70 mg/dL. Signs include shakiness, diaphoresis, tachycardia, confusion, irritability, and hunger. If the patient is conscious, use the Rule of 15: give 15g fast-acting carbs (4 oz juice or glucose tablets), recheck in 15 minutes. If unconscious, give glucagon IM or SubQ, or D50 IV. Follow with complex carbs and protein once stable. Identify and address the underlying cause.
| Term | Meaning |
|---|---|
| Heart Failure (HF) | Heart cannot pump effectively. Left-sided: pulmonary congestion (dyspnea, crackles, orthopnea, pink frothy sputum). Right-sided: systemic congestion (peripheral edema, JVD, hepatomegaly, weight gain). Monitor: daily weights (1 kg = 1L fluid), I&O, lung sounds. Medications: ACE inhibitors, beta-blockers, diuretics. Restrict sodium (<2g/day) and fluid. |
| Myocardial Infarction (MI) | Blocked coronary artery causes myocardial necrosis. Signs: crushing chest pain (may radiate to arm/jaw), diaphoresis, nausea, dyspnea. Women may present atypically (fatigue, back pain). MONA: Morphine, Oxygen (if SpO2 <94%), Nitroglycerin, Aspirin. 12-lead ECG within 10 minutes. Troponin levels. PCI (stent) within 90 minutes or thrombolytics within 30 minutes. |
| Pneumonia | Lung infection (bacterial, viral, fungal). Signs: fever, productive cough, crackles, dyspnea, tachypnea, pleuritic chest pain. Nursing: incentive spirometry, position HOB elevated, encourage fluids, administer antibiotics as ordered, obtain sputum culture before first antibiotic dose. Prevent aspiration in at-risk patients. Vaccine prevention (pneumococcal, influenza). |
| Diabetic Ketoacidosis (DKA) | Life-threatening complication of Type 1 diabetes. Caused by insulin deficiency leading to hyperglycemia, ketone production, and metabolic acidosis. Signs: blood glucose >300, pH <7.35, Kussmaul respirations (deep rapid breathing), fruity breath, dehydration. Treatment: IV fluids (NS first), insulin drip, potassium replacement (check K+ before insulin, insulin drives K+ into cells). Monitor glucose hourly. |
| Stroke (CVA) | Ischemic (87%, clot) or hemorrhagic (13%, bleed). Signs: sudden facial drooping, arm weakness, speech difficulty (FAST). Time is critical: ischemic stroke tPA within 3-4.5 hours of symptom onset. CT scan first to rule out hemorrhage. Nursing: neuro checks q15-30 min, HOB flat (ischemic) or elevated 30 degrees (hemorrhagic), NPO until swallow evaluation, fall prevention. |
| Chronic Kidney Disease (CKD) | Progressive loss of kidney function. GFR <60 for 3+ months. Complications: fluid overload, hyperkalemia, anemia (decreased erythropoietin), metabolic acidosis, osteodystrophy (calcium/phosphorus imbalance), uremia. Diet: restrict protein, potassium, phosphorus, sodium, fluids. Medications: phosphate binders, erythropoietin, iron supplements. Dialysis when GFR <15. |
| COPD | Chronic bronchitis and/or emphysema. Progressive airflow limitation. Signs: barrel chest, pursed-lip breathing, dyspnea on exertion, chronic cough. O2 therapy: low flow (1-2 L/min), hypoxic drive in COPD patients. Medications: bronchodilators (albuterol, tiotropium), inhaled corticosteroids. Teach: smoking cessation, breathing techniques, energy conservation, flu/pneumonia vaccines. |
| Sepsis | Life-threatening organ dysfunction from dysregulated infection response. qSOFA: altered mental status, SBP <=100, respiratory rate >=22. Sepsis bundle (Hour-1): obtain lactate, blood cultures before antibiotics, administer broad-spectrum antibiotics, begin IV fluids (30 mL/kg crystalloid), apply vasopressors if hypotensive after fluids. Monitor urine output (target >0.5 mL/kg/hr). Early recognition saves lives. |
| Deep Vein Thrombosis (DVT) | Blood clot in deep vein, usually in leg. Signs: unilateral leg swelling, warmth, redness, pain (Homans sign unreliable). Risk factors: immobility, surgery, cancer, pregnancy, oral contraceptives. Diagnosis: D-dimer, duplex ultrasound. Treatment: anticoagulation (heparin bridge to warfarin, or DOACs). Prevention: early ambulation, SCDs, prophylactic anticoagulation. Risk: pulmonary embolism if clot dislodges. |
| Pulmonary Embolism (PE) | Blood clot lodges in pulmonary artery. Signs: sudden dyspnea, tachycardia, pleuritic chest pain, hemoptysis, anxiety. ABGs: respiratory alkalosis initially (hyperventilation). Diagnosis: CT angiography (gold standard), D-dimer. Treatment: anticoagulation, thrombolytics if massive PE, embolectomy. Prevention: treat/prevent DVT. |
| Preeclampsia | Pregnancy complication after 20 weeks. BP >=140/90 + proteinuria (or other organ dysfunction). Severe features: BP >=160/110, thrombocytopenia, liver enzyme elevation, renal insufficiency, pulmonary edema, visual/cerebral symptoms. Treatment: magnesium sulfate (seizure prevention, monitor for toxicity: loss of DTRs, respiratory depression; antidote calcium gluconate), antihypertensives, delivery is definitive treatment. |
| Compartment Syndrome | Increased pressure within a muscle compartment compromises circulation and nerve function. Signs: 5 P's, Pain (out of proportion, worsens with passive stretching), Pressure (tense compartment), Paresthesia, Pallor, Pulselessness (late sign). Emergency: remove restrictive dressings/casts, notify surgeon immediately. Treatment: fasciotomy. Do NOT elevate above heart (decreases perfusion). |
| Hypoglycemia in Diabetes | Blood glucose <70 mg/dL. Signs: shakiness, diaphoresis, tachycardia, confusion, irritability, hunger. If conscious: Rule of 15, give 15g fast-acting carbs (4 oz juice, glucose tablets), recheck in 15 minutes. If unconscious: glucagon IM/SubQ, or D50 IV. Follow with complex carbs and protein once stable. Identify and address cause. |
| Addisonian Crisis | Acute adrenal insufficiency, life-threatening. Causes: abrupt withdrawal of corticosteroids, stress in Addison's disease patient. Signs: hypotension, shock, hyperkalemia, hyponatremia, hypoglycemia. Treatment: IV hydrocortisone (stress dose), IV fluids (NS), treat hyperkalemia. Prevention: never abruptly discontinue steroids after long-term use, teach patients about stress dosing. |
| Burns, Rule of Nines | Adults: head 9%, each arm 9%, anterior trunk 18%, posterior trunk 18%, each leg 18%, perineum 1%. Parkland formula for fluid resuscitation: 4 mL x kg x %TBSA burned (give half in first 8 hours from time of burn). Monitor urine output (target 0.5-1 mL/kg/hr). Assess airway (singed nasal hairs, hoarse voice = potential inhalation injury). Infection prevention is priority after initial stabilization. |
| Thyroid Storm | Life-threatening exacerbation of hyperthyroidism. Triggers: infection, surgery, trauma in uncontrolled hyperthyroidism. Signs: high fever (>104F), extreme tachycardia, agitation, delirium, heart failure. Treatment: beta-blockers (propranolol), PTU or methimazole (block thyroid hormone synthesis), iodine (given AFTER antithyroid meds), glucocorticoids, cooling measures. ICU admission. |
How to Study nursing Effectively
Mastering nursing requires the right study approach, not just more hours. Research in cognitive science shows three techniques produce the best learning outcomes: active recall (testing yourself rather than re-reading), spaced repetition (reviewing at scientifically-optimized intervals), and interleaving (mixing related topics rather than studying one in isolation).
Why Flashcards Beat Re-reading
FluentFlash is built around all three techniques. When you study nursing with our FSRS algorithm, every term is scheduled for review at exactly the moment you're about to forget it. This maximizes retention while minimizing study time. The most common mistake students make is relying on passive review methods. Re-reading notes, highlighting textbook passages, or watching lecture videos feels productive, but studies show these methods produce only 10-20% of the retention that active recall achieves.
Flashcards force your brain to retrieve information, which strengthens memory pathways far more than recognition alone. Pair this with spaced repetition scheduling, and you can learn in 20 minutes a day what would take hours of passive review.
Building Your Study Plan
Start by creating 15-25 flashcards covering the highest-priority concepts. Review them daily for the first week using our FSRS scheduling. As cards become easier, intervals automatically expand from minutes to days to weeks. You're always working on material at the edge of your knowledge. After 2-3 weeks of consistent practice, nursing concepts become automatic rather than effortful to recall.
- Generate flashcards using FluentFlash AI or create them manually from your notes
- Study 15-20 new cards per day, plus scheduled reviews
- Use multiple study modes (flip, multiple choice, written) to strengthen recall
- Track your progress and identify weak topics for focused review
- Review consistently, daily practice beats marathon sessions
- 1
Generate flashcards using FluentFlash AI or create them manually from your notes
- 2
Study 15-20 new cards per day, plus scheduled reviews
- 3
Use multiple study modes (flip, multiple choice, written) to strengthen recall
- 4
Track your progress and identify weak topics for focused review
- 5
Review consistently, daily practice beats marathon sessions
Why Flashcards Work Better Than Other Study Methods for nursing
Flashcards aren't just for vocabulary. They're one of the most research-backed study tools for any subject, including nursing. The reason comes down to how memory works. When you read a textbook passage, your brain stores that information in short-term memory. Without retrieval practice, it fades within hours. Flashcards force retrieval, which transfers information from short-term to long-term memory.
The Testing Effect
The testing effect, documented in hundreds of peer-reviewed studies, shows that students who study with flashcards consistently outperform those who re-read by 30-60% on delayed tests. This isn't because flashcards contain more information. It's because retrieval strengthens neural pathways in a way that passive exposure cannot. Every time you successfully recall a nursing concept from a flashcard, you make that concept easier to recall next time.
Spaced Repetition Amplifies Learning
FluentFlash amplifies this effect with the FSRS algorithm, a modern spaced repetition system that schedules reviews at mathematically-optimal intervals based on your actual performance. Cards you find easy get pushed further into the future. Cards you struggle with come back sooner. Over time, this builds remarkable retention with minimal time investment. Students using FSRS-based systems typically retain 85-95% of material after 30 days, compared to roughly 20% retention from passive review alone.