Clinical Knowledge Library
High-yield clinical pathways and reasoning for SMLE preparation.
46 protocols available
Review the SMLE syllabus and blueprint · Try free clinical practice questions
Acute Otitis Media (AOM) in Pediatrics: Diagnosis and Management
Acute Otitis Media (AOM) is characterized by acute onset of symptoms (fever, ear pain) and signs of middle ear inflammation, such as a bulging tympanic membrane. The first-line antibiotic therapy for AOM is Amoxicillin, given at a high dose (80-90 mg/kg/day). Amoxicillin is effective against the most common bacterial pathogen, Streptococcus pneumoniae. If the patient has been treated with amoxicillin in the past 30 days, or has concurrent purulent conjunctivitis, Amoxicillin-clavulanate is preferred to cover beta-lactamase-producing organisms like H. influenzae.
HIV/AIDS: Diagnosis and Management
AIDS (Acquired Immunodeficiency Syndrome) is the final, most severe stage of HIV infection, characterized by a profoundly compromised immune system that makes individuals highly susceptible to opportunistic infections and certain cancers. It is diagnosed when the CD4+ T-cell count drops below 200 cells/mm³ or when specific AIDS-defining opportunistic illnesses develop. The cornerstone of AIDS treatment is highly active antiretroviral therapy (HAART), a combination of drugs that suppress HIV replication, preserve immune function, and prevent further progression. HAART significantly reduces viral load, increases CD4+ T-cell counts, and improves overall health. Treatment also includes prophylactic antibiotics to prevent opportunistic infections and specific therapies for any active infections or cancers. Symptoms of AIDS are primarily due to the opportunistic infections and cancers that take advantage of the severely weakened immune system. Common manifestations include persistent fever, chronic diarrhea, significant unintentional weight loss, night sweats, fatigue, swollen lymph nodes, and recurrent severe infections like Pneumocystis pneumonia, Kaposi's sarcoma, and toxoplasmosis. Neurological complications such as AIDS dementia complex can also occur.
Bradycardia: Evaluation and Management
Bradycardia is a medical condition characterized by a slower than normal heart rate, typically defined as fewer than 60 beats per minute (bpm) in adults. While sometimes physiological and benign, it can also indicate underlying cardiovascular or systemic issues that impair the heart's ability to effectively pump blood. Treatment for bradycardia depends on its underlying cause, severity, and the presence of symptoms. Asymptomatic bradycardia, especially in athletes, often requires no intervention. Symptomatic bradycardia may necessitate discontinuing or adjusting causative medications, treating underlying conditions, or in severe cases, implanting a permanent pacemaker to regulate heart rhythm. Acute, unstable bradycardia may require intravenous atropine or temporary pacing. Clinical manifestations range from asymptomatic presentation to severe symptoms depending on the degree of bradycardia and the patient's cardiovascular reserve. Common symptoms include fatigue, dizziness, lightheadedness, syncope (fainting), shortness of breath, and chest pain. In critical cases, it can lead to confusion, hypotension, and signs of organ hypoperfusion.
Chronic Hepatitis C: Diagnosis and Management
Chronic Hepatitis C Virus (HCV) infection is a persistent inflammatory condition of the liver caused by the hepatitis C virus, defined by the presence of detectable HCV RNA for at least six months. This long-term infection can progressively lead to significant liver damage, including fibrosis, cirrhosis, and hepatocellular carcinoma. Current treatment primarily involves direct-acting antiviral (DAA) medications, which are highly effective oral regimens targeting specific viral proteins to inhibit HCV replication. These therapies typically achieve a sustained virologic response (SVR) in over 95% of patients, effectively curing the infection. Treatment duration usually ranges from 8 to 12 weeks, depending on the specific regimen and patient factors. Chronic HCV infection is often asymptomatic for many years, leading to a silent progression of liver disease. When symptoms do appear, they are often non-specific, such as fatigue, malaise, nausea, and right upper quadrant discomfort. As the disease advances to cirrhosis, signs of liver decompensation may emerge, including jaundice, ascites, peripheral edema, spider angiomata, and hepatic encephalopathy.
Chronic Hypertension: Diagnosis and Management
Chronic hypertension is a persistent and sustained elevation of blood pressure, typically defined as a systolic blood pressure greater than or equal to 130 mmHg or a diastolic blood pressure greater than or equal to 80 mmHg on multiple occasions. It is a major modifiable risk factor for various cardiovascular diseases, stroke, and kidney disease. Treatment for chronic hypertension involves a multi-faceted approach, starting with lifestyle modifications such as dietary changes (e.g., DASH diet), regular physical activity, weight loss, and reduced sodium and alcohol intake. Pharmacological therapy is often necessary and may include various classes of antihypertensive medications like diuretics, ACE inhibitors, angiotensin receptor blockers (ARBs), beta-blockers, and calcium channel blockers, frequently used in combination to achieve target blood pressure. Chronic hypertension is often referred to as 'the silent killer' because it is frequently asymptomatic for many years, even at high levels. When symptoms do occur, they are typically non-specific and may include headaches, dizziness, nosebleeds, or shortness of breath, usually manifesting in severe or long-standing cases or during a hypertensive crisis. Most diagnoses are made during routine medical screenings.
Cirrhosis: Diagnosis and Management
Cirrhosis is a late-stage liver disease characterized by the irreversible replacement of healthy liver tissue with extensive scar tissue (fibrosis) and regenerative nodules, leading to impaired liver function and progressive liver failure. This scarring disrupts the liver's normal structure and blood flow, severely compromising its ability to perform vital functions. Treatment for cirrhosis primarily focuses on addressing the underlying cause to prevent further liver damage and managing complications. This involves abstaining from alcohol, antiviral therapy for hepatitis, immunosuppressants for autoimmune conditions, diuretics for fluid retention (ascites/edema), and lactulose or rifaximin for hepatic encephalopathy. Liver transplantation is the definitive treatment for end-stage decompensated cirrhosis. Early stages of cirrhosis are often asymptomatic. As the disease progresses, common symptoms include fatigue, weakness, unintentional weight loss, nausea, and anorexia. Signs of decompensated cirrhosis may manifest as jaundice, ascites, peripheral edema, hepatic encephalopathy (confusion, lethargy), spider angiomas, palmar erythema, and easy bruising or bleeding.
COPD & Smoking Cessation Counseling: Ethical and Clinical Guidelines
When a patient consistently refuses recommended lifestyle changes such as smoking cessation, the most appropriate approach is to respect their autonomy while maintaining a supportive, non-judgmental stance. This ensures the therapeutic relationship is preserved and leaves the door open for future interventions when the patient is ready to reconsider. Physicians have a professional duty to provide care, and withdrawing care as a punitive measure for a patient's lifestyle choices is against medical ethics. Coercion or breaching confidentiality without explicit consent or imminent harm is highly unethical.
Gastroesophageal Reflux Disease (GERD): Diagnosis and Management
Gastroesophageal Reflux Disease (GERD) is a chronic digestive condition characterized by the backward flow of stomach acid or bile into the esophagus, causing irritation and inflammation. This reflux occurs when the lower esophageal sphincter (LES) weakens or relaxes inappropriately, failing to prevent gastric contents from returning to the food pipe. Treatment typically begins with lifestyle modifications such as dietary changes (avoiding trigger foods), weight loss, and elevating the head of the bed. Pharmacological interventions include antacids for immediate relief, H2-receptor blockers to reduce acid production, and proton pump inhibitors (PPIs) as the most effective agents for sustained acid suppression and healing. For severe or refractory cases, surgical options like fundoplication may be considered to reinforce the lower esophageal sphincter. The hallmark symptom is heartburn, a burning sensation in the chest that often worsens after eating, at night, or when lying down. Other common symptoms include regurgitation of food or sour liquid, chest pain, dysphagia (difficulty swallowing), chronic cough, hoarseness, and feeling a lump in the throat (globus sensation). Less common symptoms can include nausea, bad breath, or dental erosion.
Heart Failure with Reduced Ejection Fraction: Diagnosis and Management
Heart Failure with Reduced Ejection Fraction (HFrEF) is a clinical syndrome characterized by the heart's inability to pump sufficient blood to meet the body's metabolic demands due to impaired systolic function of the left ventricle, typically defined by a left ventricular ejection fraction (LVEF) of 40% or less. Treatment for HFrEF focuses on guideline-directed medical therapy (GDMT) including angiotensin receptor-neprilysin inhibitors (ARNI), beta-blockers, mineralocorticoid receptor antagonists (MRA), and sodium-glucose cotransporter-2 (SGLT2) inhibitors to reduce mortality and morbidity. Diuretics are used for symptom relief from congestion, and device therapies like implantable cardioverter-defibrillators (ICD) or cardiac resynchronization therapy (CRT) may be indicated for selected patients. Lifestyle modifications, such as dietary sodium restriction and fluid management, are also crucial. Patients commonly present with progressive exertional dyspnea, orthopnea, paroxysmal nocturnal dyspnea, and fatigue due to reduced forward flow. Physical signs may include peripheral edema, jugular venous distension, pulmonary rales (crackles), an S3 gallop, and hepatomegaly, indicating fluid congestion.
Insulin Deficiency: Causes, Diagnosis and Management
Insulin deficiency is a metabolic condition characterized by inadequate production or complete absence of insulin from the pancreatic beta cells, resulting in impaired glucose utilization and elevated blood glucose levels. This typically leads to a diagnosis of Type 1 Diabetes Mellitus or represents a late stage of other pancreatic diseases. The mainstay of treatment is lifelong exogenous insulin replacement, administered through multiple daily injections or an insulin pump, to mimic physiological insulin secretion. Management also involves diligent blood glucose monitoring, carbohydrate counting, dietary adjustments, and regular physical activity to optimize glycemic control and prevent complications. Key symptoms include polyuria (frequent urination), polydipsia (excessive thirst), polyphagia (increased hunger), and unexplained weight loss. Patients often experience fatigue, blurred vision, recurrent infections, and in acute severe cases, symptoms of diabetic ketoacidosis such as nausea, vomiting, abdominal pain, and rapid, deep breathing (Kussmaul respirations).
Iron Deficiency Anemia: Evaluation and Management
The evaluation of anemia begins with a complete blood count (CBC). A microcytic, hypochromic anemia (low MCV, low MCH) is highly suggestive of iron deficiency anemia (IDA), especially in women of childbearing age with a history of heavy menses. The diagnosis is confirmed by iron studies showing low serum iron, low ferritin, and high total iron-binding capacity (TIBC). The first-line treatment is oral iron supplementation (e.g., ferrous sulfate). Re-evaluation of hemoglobin levels should occur after 2-4 weeks to ensure an adequate response.
Irritable Bowel Syndrome (IBS): Diagnosis and Management
Irritable Bowel Syndrome (IBS) is a common, chronic functional gastrointestinal disorder characterized by recurrent abdominal pain associated with altered bowel habits, without any identifiable structural or biochemical abnormalities. Management involves a combination of dietary modifications, lifestyle changes, and pharmacotherapy tailored to the predominant symptoms. Dietary approaches like the low-FODMAP diet, stress management techniques, and regular exercise are often recommended. Medications include antispasmodics for pain, laxatives for constipation, anti-diarrheals, and sometimes low-dose tricyclic antidepressants or selective serotonin reuptake inhibitors to modulate pain and gut function. Psychological therapies such as cognitive behavioral therapy (CBT) are also effective. Key symptoms include recurrent abdominal pain, often cramping, which is related to defecation or a change in stool frequency or form. Patients experience altered bowel habits, presenting as predominant diarrhea (IBS-D), constipation (IBS-C), or a mixed pattern (IBS-M). Other common symptoms include bloating, gas, abdominal distension, and a sense of incomplete evacuation.
Lymphedema: Diagnosis and Management
Lymphedema is a chronic, progressive condition characterized by localized fluid retention and tissue swelling, primarily in the limbs, due to impaired lymphatic system drainage. It results from a malfunctioning or damaged lymphatic system that is unable to effectively return protein-rich interstitial fluid to the systemic circulation. Treatment primarily involves Complex Decongestive Therapy (CDT), which includes manual lymphatic drainage, compression therapy (bandaging and garments), meticulous skin care to prevent infections, and therapeutic exercises. Surgical interventions, such as lymphovenous bypass, vascularized lymph node transfer, or debulking procedures (e.g., liposuction), may be considered for select patients who do not respond adequately to conservative management. Key symptoms include persistent swelling of an extremity or body part, often described as a feeling of heaviness or fullness, aching, and discomfort. Signs can include skin changes such as thickening, hardening (fibrosis), hyperkeratosis, papillomatosis, and impaired range of motion. Recurrent infections, particularly cellulitis, are also common.
Major Depressive Disorder: Diagnosis and Treatment
Major Depressive Disorder (MDD) is diagnosed when a patient experiences at least 5 of 9 typical symptoms (including depressed mood or anhedonia) for at least 2 weeks, causing significant impairment. First-line pharmacological treatment for MDD typically involves Selective Serotonin Reuptake Inhibitors (SSRIs) such as sertraline, fluoxetine, or citalopram. Cognitive Behavioral Therapy (CBT) is also a highly effective first-line psychotherapy. A combination of pharmacotherapy and psychotherapy often yields the best outcomes.
Maternal Physiological Adaptations in Pregnancy
During a normal singleton pregnancy, the maternal circulatory system undergoes remarkable physiological adaptations to support the developing fetus, meet increased metabolic demands, and prepare for the demands of labor and delivery. These changes are initiated early in gestation and progress throughout pregnancy, typically peaking by 32-34 weeks. One of the most critical and prominent adaptations is a significant expansion of the total maternal blood volume. Plasma volume increases disproportionately, typically by 40-50% above non-pregnant levels. Red blood cell mass also increases, but to a lesser extent, usually by 20-30% (more with adequate iron supplementation). The combined effect results in an overall increase in total blood volume by approximately 40-45% by term.
Metastatic Breast Cancer: Management Overview
Metastatic breast cancer (MBC), also known as stage IV breast cancer, occurs when breast cancer cells have spread beyond the breast and regional lymph nodes to distant organs in the body. It is an incurable but treatable disease focused on controlling progression and improving quality of life. Treatment for metastatic breast cancer is primarily palliative, aiming to control disease progression, alleviate symptoms, and maintain or improve quality of life. It involves systemic therapies tailored to the tumor's biological characteristics (e.g., hormone receptor status, HER2 status) and prior treatments, including chemotherapy, hormone therapy, targeted therapy (e.g., CDK4/6 inhibitors, anti-HER2 drugs), and immunotherapy. Localized treatments like radiation therapy or surgery may be used to manage specific symptomatic lesions or complications. Symptoms vary significantly depending on the site of metastasis. Common manifestations include bone pain (bone metastases), shortness of breath or persistent cough (lung metastases), jaundice or abdominal discomfort (liver metastases), and headaches, seizures, or neurological deficits (brain metastases). Systemic symptoms such as severe fatigue, unexplained weight loss, and general malaise are also frequently observed.
Mitral Regurgitation: Diagnosis and Management
Mitral regurgitation (MR) is a heart valve disorder in which the mitral valve, located between the left atrium and left ventricle, fails to close properly during systole, causing blood to leak backward into the left atrium. This backward flow reduces the amount of blood pumped forward to the body and can lead to increased pressure in the left atrium and lungs. Management strategies range from medical therapy to surgical or transcatheter intervention, depending on the severity and etiology. Medical treatments, including diuretics, vasodilators, and beta-blockers, are used to manage symptoms and reduce cardiac workload. Surgical repair or replacement of the mitral valve is often recommended for severe symptomatic MR or asymptomatic MR with evidence of progressive left ventricular dysfunction or dilation. Percutaneous transcatheter mitral valve repair is an option for select high-risk patients. Common symptoms include shortness of breath (dyspnea), fatigue, palpitations, and peripheral edema, particularly with exertion, due to reduced cardiac output and pulmonary congestion. A characteristic holosystolic murmur is typically heard best at the apex and radiates to the axilla. In severe or chronic cases, signs of left-sided heart failure such as crackles in the lungs, jugular venous distention, and an S3 gallop may be present.
Nephrolithiasis (Kidney Stones): Evaluation and Management
Nephrolithiasis typically presents with acute, severe, colicky flank pain that may radiate to the groin, often accompanied by hematuria, nausea, and vomiting. The gold standard imaging modality for diagnosing kidney stones is a non-contrast CT scan of the abdomen and pelvis. It offers high sensitivity and specificity for detecting stones, determining their size and location, and identifying associated complications like hydronephrosis. Initial management focuses on pain control (NSAIDs or opioids) and hydration. Stones smaller than 5mm often pass spontaneously.
Parkinson's Disease: Clinical Features and Diagnosis
Parkinson's disease (PD) is a progressive neurodegenerative disorder caused by the loss of dopaminergic neurons in the substantia nigra. The diagnosis is primarily clinical, based on the presence of cardinal motor features: resting tremor (often described as 'pill-rolling'), bradykinesia (slowness of movement), rigidity (cogwheel rigidity), and postural instability (which tends to occur later in the disease course). A positive response to dopaminergic therapy (like Levodopa) further supports the diagnosis.
Primary Hypothyroidism: Diagnosis and Management
Primary hypothyroidism is characterized by an underactive thyroid gland, resulting in decreased production of thyroid hormones. Common symptoms include fatigue, weight gain, cold intolerance, constipation, and dry skin. The diagnosis is established by finding an elevated Thyroid Stimulating Hormone (TSH) and a low free Thyroxine (Free T4). The standard treatment is daily replacement therapy with synthetic levothyroxine (T4). The goal of therapy is to normalize the serum TSH level, which should be rechecked 6-8 weeks after initiating or adjusting the dose.
Pulmonary Embolism: Diagnosis and Management
Pulmonary embolism (PE) is a life-threatening condition caused by a blockage in one of the pulmonary arteries in the lungs, most commonly due to a blood clot that has traveled from a deep vein in the legs or pelvis (deep vein thrombosis). This obstruction impedes blood flow to parts of the lung, leading to impaired gas exchange and potential cardiovascular collapse. Acute treatment typically involves prompt anticoagulation with agents such as unfractionated heparin, low molecular weight heparin, or direct oral anticoagulants (DOACs) to prevent clot propagation and new clot formation. In high-risk PE with hemodynamic instability, thrombolysis (fibrinolysis) may be administered to dissolve the clot. Surgical pulmonary embolectomy or catheter-directed interventions are considered for patients with massive PE who cannot receive or have failed thrombolysis. Symptoms are often non-specific and can include sudden onset of dyspnea, pleuritic chest pain (pain on breathing), and cough. Signs may include tachypnea (rapid breathing), tachycardia (rapid heart rate), hypoxemia, and in severe cases, syncope, hypotension, or signs of right heart failure. Hemoptysis (coughing up blood) may also occur.
Septic Shock: Recognition and Management
Septic shock is a life-threatening condition characterized by circulatory, cellular, and metabolic abnormalities that are profound enough to substantially increase mortality, stemming from a dysregulated host response to infection. It is a subset of sepsis where patients require vasopressors to maintain an adequate mean arterial pressure and have elevated serum lactate despite adequate fluid resuscitation. Immediate management involves rapid administration of broad-spectrum antibiotics, aggressive intravenous fluid resuscitation (typically crystalloids), and vasopressors (e.g., norepinephrine) to restore and maintain adequate blood pressure and organ perfusion. Source control of infection (e.g., drainage of abscess, removal of infected device) is critical. Supportive care, including mechanical ventilation, renal replacement therapy, and glycemic control, is often required. Patients present with signs of severe infection and profound circulatory dysfunction, including persistent hypotension requiring vasopressors to maintain a mean arterial pressure of 65 mmHg or greater, despite adequate fluid resuscitation, and a serum lactate level > 2 mmol/L. Other manifestations of organ dysfunction may include altered mental status, oliguria, tachycardia, tachypnea, fever or hypothermia, and mottled skin.
Stable Angina Pectoris: Clinical Evaluation
Stable angina is characterized by episodic chest discomfort that is predictably provoked by exertion or emotional stress and relieved by rest or nitroglycerin. The initial evaluation involves a thorough history and physical examination, followed by a resting ECG. If the patient can exercise and has a normal resting ECG, an exercise stress test (treadmill ECG) is the preferred initial non-invasive functional test for diagnosing ischemic heart disease. Patients with abnormal resting ECGs or inability to exercise require imaging-based stress testing (e.g., stress echocardiography or nuclear perfusion imaging).
Systemic Lupus Erythematosus (SLE): Diagnosis and Management
Systemic Lupus Erythematosus (SLE) is a chronic autoimmune disease characterized by widespread inflammation and tissue damage, as the immune system mistakenly attacks its own healthy tissues and organs. It can affect nearly any part of the body, including joints, skin, kidneys, brain, heart, and lungs. Treatment for SLE aims to control symptoms, reduce inflammation, prevent organ damage, and minimize flare-ups. This typically involves corticosteroids for acute flares, antimalarials (e.g., hydroxychloroquine) for long-term disease control, and immunosuppressants (e.g., methotrexate, azathioprine, mycophenolate mofetil) for moderate to severe disease. Biologic agents (e.g., belimumab, anifrolumab) are also used for targeted immunomodulation. SLE presents with a diverse range of symptoms due to multi-organ involvement. Common manifestations include joint pain and swelling (arthritis/arthralgia), a characteristic butterfly-shaped malar rash, photosensitivity, oral ulcers, and profound fatigue. More severe features can include lupus nephritis (kidney inflammation), neurological issues (seizures, psychosis), serositis (inflammation of lining of lungs or heart), and hematologic abnormalities (anemia, leukopenia, thrombocytopenia).
Urosepsis: Diagnosis and Management
Urosepsis is a life-threatening organ dysfunction caused by a dysregulated host response to infection originating from the urinary tract. It represents a severe systemic inflammatory response syndrome (SIRS) triggered by a urinary tract infection (UTI). Treatment involves immediate initiation of broad-spectrum intravenous antibiotics, empirically selected to cover common uropathogens, and subsequently narrowed based on culture sensitivities. Aggressive supportive care, including intravenous fluid resuscitation to correct hypotension, and vasopressors if needed, is crucial to maintain organ perfusion. Source control, such as removal of an obstructed catheter or drainage of a collection, is also a critical component of management. Patients commonly present with signs of systemic infection, including high fever, chills, tachycardia, and hypotension. They may also exhibit symptoms related to the urinary source, such as dysuria, flank pain, urgency, or suprapubic tenderness. Signs of organ dysfunction like altered mental status, oliguria, tachypnea, or mottled skin may also be present, indicating severe sepsis or septic shock.
Volvulus: Diagnosis and Management
Volvulus is a medical condition characterized by the twisting of a loop of intestine around itself and its mesentery, leading to bowel obstruction and potential compromise of blood supply (ischemia). It is a surgical emergency that can affect any part of the gastrointestinal tract, most commonly the sigmoid colon or cecum in adults, and the midgut in infants. Urgent surgical intervention is the definitive treatment for most cases of volvulus to untwist the bowel (detorsion) and assess for viability. If the bowel is found to be gangrenous or non-viable, resection of the affected segment with either primary anastomosis or ostomy formation (e.g., colostomy) is performed. In select cases of sigmoid volvulus, endoscopic detorsion may be attempted as a bridge to elective surgery or in stable, non-ischemic patients. Patients typically experience sudden onset of severe, colicky abdominal pain that may be constant, accompanied by abdominal distension and obstipation (inability to pass flatus or stool). Nausea and vomiting are common, and in infants, bilious vomiting is a key sign of midgut volvulus. As ischemia progresses, signs of peritonitis, such as guarding, rigidity, and rebound tenderness, may develop.
Acute Coronary Syndrome (ACS): Diagnosis and Emergency Management
Suspect ACS in any patient with prolonged ischemic chest pain, and obtain a 12-lead ECG within 10 minutes of arrival. Give chewable aspirin 162-325 mg and draw high-sensitivity troponin. ST-segment elevation (STEMI) requires immediate reperfusion: primary PCI within 90 minutes of first medical contact, or fibrinolysis within 30 minutes if timely PCI is unavailable. NSTEMI and unstable angina are managed with dual antiplatelet therapy, anticoagulation, high-intensity statin, and risk-stratified invasive evaluation. Treat pain with nitrates if no contraindication, control blood pressure and heart rate with a beta blocker once stable, and screen for complications such as arrhythmia and acute heart failure.
Acute Heart Failure: Diagnosis and Management
Acute heart failure presents with dyspnea, orthopnea, pulmonary crackles, elevated jugular venous pressure, and peripheral edema. Stabilize airway, breathing, and circulation first, give oxygen only if hypoxemic, and obtain an ECG, chest X-ray, BNP or NT-proBNP, and bedside echocardiogram. Patients with congestion and adequate blood pressure (warm and wet) receive intravenous loop diuretics such as furosemide, with vasodilators added if hypertensive. Hypoperfused patients (cold and wet) may need inotropes and urgent cardiology involvement. Always identify and treat the trigger: ischemia, arrhythmia, uncontrolled hypertension, infection, or non-adherence to medications.
Atrial Fibrillation: Diagnosis and Management
Confirm atrial fibrillation with an ECG showing absent P waves and an irregularly irregular ventricular response. Assess hemodynamic stability first: hypotension, ischemic chest pain, pulmonary edema, or syncope mandate urgent synchronized electrical cardioversion. In stable patients, control the ventricular rate with a beta blocker or rate-limiting calcium channel blocker, and consider rhythm control for symptomatic or new-onset AF. Estimate stroke risk with CHA2DS2-VASc and start anticoagulation, preferably a direct oral anticoagulant, in patients at elevated risk. Investigate triggers and comorbidities: hypertension, thyrotoxicosis, valvular disease, alcohol, and electrolyte disturbance.
Diabetic Ketoacidosis (DKA): Diagnosis and Management
Diagnose DKA with diabetes or hyperglycemia, ketosis and metabolic acidosis; remember that SGLT2-associated DKA can occur without marked hyperglycemia. Start intravenous isotonic saline or balanced crystalloid, adapting the rate to hydration, cardiac and renal status. Check potassium before insulin: if potassium is below 3.5 mmol/L, replace it and delay insulin until potassium is above 3.5 mmol/L. Follow a monitored insulin and electrolyte protocol, adding dextrose as glucose falls so insulin can continue to clear ketones. Assess resolution using ketones and acid-base recovery rather than glucose or the anion gap alone. Treat the precipitant and overlap subcutaneous insulin before stopping the infusion.
Community-Acquired Pneumonia (CAP): Diagnosis and Management
Suspect CAP in patients with cough, fever, sputum, and focal chest signs, and confirm with a chest radiograph showing new infiltrate. Stratify severity with CURB-65 (confusion, urea, respiratory rate, blood pressure, age 65 or older). Low-risk patients are treated as outpatients with amoxicillin, adding or substituting a macrolide for atypical coverage where appropriate. Patients admitted to the ward receive a beta-lactam such as ceftriaxone plus a macrolide such as azithromycin, while severe CAP requiring ICU care needs broader coverage and exclusion of resistant pathogens. Give antibiotics within 4 hours, support oxygenation, and reassess at 48-72 hours.
Chronic Kidney Disease (CKD): Diagnosis and Management
Define CKD as reduced eGFR below 60 mL/min/1.73 m2 or markers of kidney damage such as albuminuria persisting beyond 3 months, and stage it by eGFR and albuminuria category. Control blood pressure, targeting roughly below 130/80 mmHg, using an ACE inhibitor or ARB when albuminuria is present. Add an SGLT2 inhibitor for diabetic CKD with albuminuria, prescribe a statin for cardiovascular risk, and adjust doses of renally cleared drugs. Avoid nephrotoxins including NSAIDs and unchecked contrast exposure. Refer to nephrology when eGFR falls below 30, declines rapidly, or when refractory hyperkalemia, acidosis, or anemia emerges, and vaccinate against hepatitis B, influenza, and pneumococcus.
Acute Ischemic Stroke: Diagnosis and Management
Recognize stroke with sudden focal deficits: face droop, arm weakness, speech disturbance, and time of onset documented immediately. Obtain a non-contrast CT head without delay to exclude hemorrhage, and check glucose. Eligible patients presenting within 4.5 hours receive intravenous thrombolysis with alteplase after hemorrhage and contraindications are excluded. Large vessel occlusion within 24 hours may qualify for mechanical thrombectomy. Give aspirin once bleeding is excluded (or after 24 hours post-thrombolysis), manage blood pressure permissively unless thrombolysed, admit to a stroke unit, and start secondary prevention with antiplatelet or anticoagulation for AF, statin, and risk-factor control.
Preeclampsia: Diagnosis and Management
Diagnose preeclampsia with new hypertension (140/90 mmHg or higher) after 20 weeks of gestation plus proteinuria or maternal organ dysfunction. Severe features include pressure of 160/110 mmHg or higher, severe headache, visual disturbance, epigastric pain, thrombocytopenia, renal impairment, or pulmonary edema. Severe preeclampsia mandates admission, magnesium sulfate for seizure prophylaxis, and antihypertensive therapy with labetalol, oral nifedipine, or hydralazine. The definitive treatment is delivery, timed by gestational age and severity: immediate stabilization then delivery at term or with severe features, and expectant management only in carefully selected preterm cases without severe features. Continue magnesium for 24 hours postpartum.
Gestational Diabetes Mellitus (GDM): Screening and Management
Screen all pregnant women at 24-28 weeks with a 75 g oral glucose tolerance test, or earlier when risk factors such as obesity or previous GDM exist. First-line management is medical nutrition therapy with structured physical activity and daily glucose self-monitoring. If fasting or postprandial targets are repeatedly exceeded despite lifestyle measures, start insulin, with metformin as an accepted alternative in many guidelines. Monitor fetal growth because GDM drives macrosomia, and plan delivery around 38-39 weeks when medication is required. After delivery, insulin needs fall sharply; arrange a 75 g OGTT at 6-12 weeks postpartum because about half of women with GDM later develop type 2 diabetes.
Postpartum Hemorrhage (PPH): Recognition and Management
Define PPH as blood loss of 500 mL or more after vaginal birth or 1000 mL or more after cesarean, or any loss causing hemodynamic instability. Call for help, establish large-bore intravenous access, send blood tests including crossmatch, and assess the 4 T's: tone, trauma, tissue, and thrombin. Uterine atony causes about 70% of cases and is treated immediately with bimanual uterine massage and oxytocin infusion. Escalate uterotonics as needed: carboprost (avoid in asthma), methylergonovine (avoid in hypertension), and misoprostol, and give tranexamic acid within 3 hours of birth. Persistent bleeding proceeds to intrauterine balloon tamponade, then surgical options including compression sutures, artery ligation or embolization, and hysterectomy as the last resort.
Ectopic Pregnancy: Diagnosis and Management
Consider ectopic pregnancy in any woman of reproductive age with amenorrhea, unilateral pelvic pain, or irregular bleeding. Measure quantitative beta-hCG and perform transvaginal ultrasound; an empty uterus with beta-hCG above the discriminatory zone (about 1500-3500 IU/L) strongly suggests ectopic. Hemodynamically unstable patients or ruptured ectopics require urgent laparoscopic surgery, usually salpingectomy. Stable patients with small unruptured ectopics, low and declining or plateauing hCG, and no fetal heartbeat may receive intramuscular methotrexate with strict hCG follow-up on days 4 and 7. Expectant management is reserved for very low, falling hCG levels. Give anti-D immunoglobulin to Rh-negative women after surgical management.
Normal Labour: Stages and Management
Labour begins with regular painful contractions causing progressive cervical dilation and effacement. The latent phase extends to about 6 cm dilation; the active phase runs from 6 cm to full dilation, and normal progress is roughly 1 cm per 2 hours in nulliparas once established. Monitor contractions, maternal vital signs, and fetal heart rate, using the partograph to plot progress and detect delay early. The second stage is full dilation to birth, limited to about 2-3 hours with regional analgesia before reassessment. The third stage is placenta delivery; active management with oxytocin after birth reduces postpartum hemorrhage. Offer continuous support, hydration, mobility, and analgesia options including epidural.
Neonatal Jaundice: Evaluation and Management
Jaundice within the first 24 hours of life is always pathological and demands urgent evaluation. Measure total serum bilirubin and plot it on an hour-specific nomogram to determine risk and treatment thresholds, checking blood group, Coombs test, and G6PD status where hemolysis is likely. Phototherapy is the mainstay once bilirubin crosses the hour-specific threshold, with intensive phototherapy for higher levels. Exchange transfusion is reserved for levels near exchange thresholds or signs of acute bilirubin encephalopathy. Optimize feeding and hydration, repeat bilirubin after phototherapy to catch rebound, and investigate prolonged jaundice beyond 2 weeks with conjugated fraction to exclude biliary atresia.
Acute Gastroenteritis and Dehydration in Children: Assessment and Management
Assess dehydration by weight change, general appearance, eyes, mucous membranes, tears, capillary refill, and skin turgor. No or mild dehydration is managed at home with oral rehydration solution in small frequent volumes plus continued feeding and breastfeeding. Moderate dehydration receives ORS, about 50-100 mL/kg over 4 hours, with ongoing losses replaced and reassessment. Severe dehydration with lethargy, sunken eyes, weak pulse, or prolonged capillary refill requires immediate intravenous isotonic fluid boluses of 20 mL/kg, repeated as needed, then transition to ORS. Ondansetron can support oral rehydration in persistent vomiting. Zinc supplementation shortens episodes, routine antibiotics are not indicated, and rotavirus vaccination prevents severe disease.
Febrile Seizures in Children: Evaluation and Management
Febrile seizures occur between 6 months and 5 years with fever and no central nervous system infection. Simple febrile seizures are generalized, last under 15 minutes, and do not recur within 24 hours; complex seizures are focal, prolonged, or recurrent within a day. For simple febrile seizures, no EEG, neuroimaging, or routine lumbar puncture is needed; evaluate and treat the fever source, and control fever with antipyretics for comfort. Prolonged seizures beyond 5 minutes are terminated with buccal midazolam or rectal diazepam. Lumbar puncture is reserved for meningeal signs or clinical concern for meningitis. Counsel parents that about one third recur, that the risk of epilepsy is only slightly increased, and teach first aid positioning.
Acute Asthma Exacerbation in Children: Assessment and Management
Grade severity by work of breathing, oxygen saturation, ability to speak, and peak flow where obtainable. Give oxygen to maintain saturation above 94% and inhaled salbutamol by spacer or nebulizer, repeated every 20 minutes in the first hour for moderate to severe attacks. Add systemic corticosteroids early: oral prednisolone for most, intravenous if unable to tolerate or in critical attacks. Add nebulized ipratropium bromide for severe or poorly responding episodes, and consider intravenous magnesium sulfate when refractory. Admit for observation if response is incomplete, and involve intensive care for silent chest, exhaustion, or rising carbon dioxide. Review inhaler technique and trigger control before discharge with an action plan.
Acute Appendicitis: Diagnosis and Management
Suspect appendicitis when periumbilical pain migrates to the right iliac fossa with anorexia, low-grade fever, and localized guarding. Examine for McBurney point tenderness, rebound, and Rovsing sign, and support the diagnosis with neutrophilia and elevated CRP. Ultrasound is the first imaging choice in children and pregnancy, with CT for equivocal adults. Definitive treatment is appendectomy, usually laparoscopic, after intravenous fluids, analgesia, and preoperative antibiotics. Perforated appendicitis with generalized peritonitis needs urgent surgery and broader antibiotics, while a stable contained appendiceal mass may be managed with antibiotics and interval appendectomy. Do not delay surgery for prolonged observation once the diagnosis is clear.
Acute Cholecystitis: Diagnosis and Management
Suspect acute cholecystitis with prolonged right upper quadrant or epigastric pain, fever, and a positive Murphy sign, typically after fatty meals in a patient with gallstone risk factors. Confirm with right upper quadrant ultrasound showing gallstones, wall thickening, pericholecystic fluid, or a sonographic Murphy sign. Initial management is nil by mouth, intravenous fluids, analgesia, and antibiotics covering enteric organisms, such as ceftriaxone plus metronidazole. Early laparoscopic cholecystectomy within the index admission is the definitive treatment for fit patients. High-risk surgical candidates may need percutaneous cholecystostomy for drainage. Distinguish complications: empyema, gangrene, perforation, and ascending cholangitis with Charcot triad.
Small Bowel Obstruction: Diagnosis and Management
Suspect mechanical obstruction with colicky central abdominal pain, distension, vomiting, and absolute constipation, especially with previous abdominal surgery. Examine for distension, high-pitched or absent bowel sounds, hernias, and signs of strangulation such as peritonism or shock. Erect abdominal X-ray shows dilated small bowel loops with air-fluid levels, while CT with contrast defines the level, cause, and complications. Initial management is nil by mouth, nasogastric decompression, intravenous fluids, electrolyte correction, and catheterization with monitoring. Adhesive partial obstruction without danger signs may settle conservatively with a defined trial period, but complete obstruction, strangulation, closed-loop obstruction, or failure to improve requires urgent laparotomy.
Acute Pancreatitis: Diagnosis and Management
Diagnose acute pancreatitis with two of three criteria: typical epigastric pain radiating to the back, lipase or amylase at least three times the upper limit of normal, and characteristic imaging. Assess severity and hydration, then begin early, goal-directed isotonic crystalloid therapy with frequent reassessment, with adequate analgesia and antiemetics. Start enteral feeding as soon as tolerated, favouring oral or nasojejunal routes over parenteral nutrition. Identify the cause: gallstones and alcohol dominate, so obtain liver tests and a right upper quadrant ultrasound. Urgent ERCP is indicated only for cholangitis or progressive biliary obstruction. Monitor for necrosis, fluid collections, respiratory failure, and organ dysfunction, escalating to high-dependency care when severe.