CEA exam study

CLINICAL EXAM PREPARATION: DIFFERENTIAL DIAGNOSIS AND PRIMARY CARE

CARDIOVASCULAR ASSESSMENT AND DISORDERS

  • Point of Maximum Impulse (PMI): In a healthy adult, the PMI is most commonly palpable at the Left 5th intercostal space, midclavicular line. It is best assessed when the patient is positioned in the supine or left lateral decubitus position.
  • Heart Valve Complications: A patient with a history of aortic valve replacement (porcine bioprosthetic valve) 7 years prior presenting with near syncope when standing should be evaluated for bioprosthetic aortic valve stenosis.
  • Chronic Heart Failure (CHF) and Heart Sounds:
    • S3 and S4 heart sounds are auscultated during the diastolic phase of the cardiac cycle.
    • New York Heart Association (NYHA) Classification: A patient symptomatic with shortness of breath during activities of daily living (ADLs) but asymptomatic at rest is classified as Class III.
    • HFrEF Management: For patients with Heart Failure with reduced Ejection Fraction (e.g., EF \approx 30\text{%}), Amlodipine (Norvasc) should be avoided as part of optimal medical therapy.
  • Cardiac Rhythm and EKG Correlation:
    • The S1 heart sound correlates with the peak of the R wave on an electrocardiogram (EKG).
    • Atrial Fibrillation (Irregularly Irregular Rhythm): The priority intervention for a patient in this rhythm for over 4 days is to maintain rate control and anticoagulate prior to rhythm conversion.
    • Supraventricular Tachycardia (SVT): For a patient with a heart rate of 220 bpm220\text{ bpm}, the most effective intravenous agent for treatment is Adenosine.
  • Angina and Myocardial Ischemia:
    • Unstable Angina: Characterized by symptoms like chest pressure and shortness of breath that may resolve with rest but require evaluation via sublingual nitroglycerin and a cardiac stress test.
    • EKG Findings: ST segment depression in leads V3 and V4 during a stress test, concurrent with chest discomfort, indicates priority medical management including aspirin 81 mg81\text{ mg} daily, Metoprolol (Lopressor) 12.5 mg12.5\text{ mg} PO BID, and cardiology referral.

PULMONARY ASSESSMENT AND DISORDERS

  • Pulmonary Function Test (PFT):
    • Forced Vital Capacity (FVC): This measurement is defined as a large inspiration of air to the furthest extent reasonably possible, followed by a full exhalation.
  • Atelectasis:
    • Physiological signs include crackles in the posterior lower lobes that clear after coughing.
    • A post-operative patient (e.g., post-appendectomy) exhibiting dull percussion sounds over lung tissue likely has atelectasis.
  • Asthma Management:
    • Initial Prescription: The first-line drug for a new diagnosis is often a Short-Acting Beta-Agonist (SABA) such as Albuterol (Xopenex) MDI PRN.
    • Inhaled Corticosteroids (ICS): Patients must be taught to rinse their mouth after use to prevent the development of oral candidiasis (thrush).
    • Monotherapy Warning: Long-Acting Beta Agonists (LABAs) must never be used as monotherapy for asthma.
    • Status Asthmaticus: In cases where nebulized albuterol provides no relief, an IM injection of Terbutaline (Bricanyl) may be beneficial.
  • Chronic Obstructive Pulmonary Disease (COPD):
    • Beta-Blocker Safety: For patients with both COPD and Coronary Artery Disease (CAD), the safest beta-blocker is the cardioselective agent Metoprolol (Lopressor).
  • Pneumothorax: In a tension pneumothorax, the trachea is expected to be shifted toward the unaffected side on a chest X-ray.
  • Interstitial Lung Disease: Results of a diaphragmatic excursion test typically show an approximately equal level of change in the descent of the diaphragm bilaterally with a decreased overall inspiratory capacity.
  • Hemoptysis: This clinical finding is most strongly associated with Lung Cancer.

ENDOCRINE AND METABOLIC DISORDERS

  • Hyperthyroidism:
    • Signs/Symptoms: Tachycardia, exophthalmos (bulging eyes), anxiety, tremors, and palpitations.
    • Thyroid Crisis (Storm): Characterized by severe tachycardia.
  • Hypothyroidism:
    • Clinical Presentation: Cold intolerance, weight gain, excessive lethargy, nonpitting periorbital edema, and dry, thinned hair (specifically the lateral third of the eyebrows).
    • Laboratory Values: A TSH of 5.9 kU/mL5.9\text{ kU/mL} (normal range 0.5−5 kU/mL0.5-5\text{ kU/mL}) and Free T4 of 0.3 ng/dL0.3\text{ ng/dL} (normal range 0.8−2.8 ng/dL0.8-2.8\text{ ng/dL}) indicate hypothyroidism.
    • Myxedema Coma: A severe manifestation that may involve an enlarged thyroid gland (goiter).
  • Diabetes Mellitus Type 2 (T2DM):
    • End-Organ Dysfunction Screening: Evaluation should include a Renal function panel, Urinalysis, and Non-dilated eye exam.
    • First-Line Pharmacotherapy: Metformin is commonly used; a frequent side effect is diarrhea.
    • Medication Escalation: Based on AAFP guidelines, a second oral anti-diabetic agent should be considered if the Hgb A1C reaches 8.0.
    • Weight Management: Ozempic (Semaglutide) is a reasonable solution for patients concerned with both T2DM control and weight gain.
  • Addison\'s Disease: Clinical findings may include Dowager hump (Note: While commonly associated with kyphosis, this is the transcript-specific finding listed).

GASTROINTESTINAL SYSTEMS AND DISORDERS

  • Abdominal Assessment Order: The correct sequence for physical examination is Inspection, Auscultation, Palpation, Percussion.
  • Gastroesophageal Reflux Disease (GERD): Heartburn is aggravated by alcohol, citrus, onions, coffee, and physical activities like lifting or bending over. It is not aggravated by gastric dumping.
  • Cholecystitis: Characterized by right upper quadrant (RUQ) pain that worsens with deep breathing and a positive Murphy sign.
  • Peritonitis: Physical findings consistent with peritonitis (often due to perforated gastric ulcer) include guarding, rebound tenderness, and rigidity.
  • Liver Span: The normal liver span for a healthy adult is 6-12 cm in the right midclavicular line.
  • Splenomegaly: During percussion of the spleen, suspicion is raised when the sound changes from dull to tympany as one percusses from the left anterior axillary line to the left sternal border.
  • Crohn\'s Disease: During an acute flare, management should include initiating Prednisone (Deltasone) while maintaining the current dose of monoclonal antibodies like Natalizumab (Tysabri).

GENITOURINARY AND RENAL SYSTEMS

  • Renal Function and Damage:
    • Early Screening: For diabetic or hypertensive patients, the first tool for evaluating early renal dysfunction is a Urinalysis with micro/macro albumin.
    • Renal Artery Stenosis: Suspicious findings include the onset of hypertension at age 30 or earlier, severe or poorly controlled hypertension in patients 55 or older, and unexplained kidney size discrepancy.
    • Acute Tubular Necrosis (ATN): Can be caused by drug overdose (e.g., Amlodipine) leading to hypotension; labs show elevated Creatinine (e.g., 1.9 mg/dL1.9\text{ mg/dL}) and BUN (e.g., 34 mg/dL34\text{ mg/dL}).
    • Hemodialysis: The primary concept is the cleaning of blood by diffusing across a semipermeable membrane.
  • Urinary Tract Infections (UTI):
    • Common pathogens include Escherichia Coli, Proteus Mirabilis, and Klebsiella Oxytoca. Enterococcus is a less likely cause.
    • Pyelonephritis: Confirmed by WBC casts on urinalysis with microscopy and a sensitive Renal punch test (CVA tenderness).
    • Glomerulonephritis: Indicated by RBC casts on urinalysis, often following a streptococcal infection.
  • Reproductive Health:
    • Varicocele: Scrotum is enlarged and feels like it is a "bag of worms" (or "full a powerlifter" per transcript).
    • Pelvic Inflammatory Disease (PID): Associated with a shuffling gait, groin pain, and positive Gonorrhea/Chlamydia testing. If untreated, evaluation via Hysterosalpingogram may be needed.
    • Dysfunctional Uterine Bleeding (DUB): The first lab test ordered should be serum beta human chorionic gonadotropin (HCG).
    • Uterine Cancer: Primary risk factors include obesity and smoking.

DERMATOLOGY

  • Precancerous Lesions: Actinic Keratosis is a precancerous lesion caused by prolonged exposure to UV-B; it can be treated with Fluorouracil (5-FU) cream.
  • Melanoma (ABCDE Criteria): Suspicious findings include Irregular borders and Dual color (especially white-reddish or blue-black).
  • Benign Lesions:
    • Seborrheic Keratosis: Darkened, round, raised, "stuck on" appearance.
    • Acanthosis Nigricans: Darkened or velvety skin in the neck, groin, or axilla; commonly associated with central obesity.
    • Seborrheic Dermatitis: Erythema on nasolabial folds with very fine dandruff in the hair and skin.
  • Potency of Topical Corticosteroids: Determined by the specific drug and the vehicle of delivery (cream, lotion, elixir, etc.).
  • Body Surface Area (BSA): According to the Rule of Palms, the patient\'s palm covers 1% of their total body surface area.

NEUROLOGY AND MUSCULOSKELETAL SYSTEMS

  • Cranial Nerve (CN) Assessments:
    • CN I (Olfactory): Patient identifies two different scents with one nostril closed.
    • CN V (Trigeminal): Responsible for facial sensation; damage causes abnormal sharp/dull testing on the cheek.
    • CN VII (Facial): A left peripheral lesion (e.g., Bell\'s Palsy) results in the inability to move both upper and lower facial muscles on the left side.
    • CN IX (Glossopharyngeal): Impairment results in an impaired gag reflex.
    • CN XII (Hypoglossal): A lesion on the left causes the tongue to deviate by pointing to the left.
  • Neurological Tests:
    • Stereognosis: Manipulating and identifying a familiar object (key, paper clip) in the hand with eyes closed within 5 seconds.
    • Egophony: Assessing voice transmission; hearing a nasally "a" sound when the patient says "ee" is a positive finding.
  • Musculoskeletal Conditions:
    • Rotator Cuff Injury: Tremendous pain when touching the opposite scapula by placing the arm over the back of the neck.
    • Scoliosis: Characterized by unequal shoulder height and lateral/rotary curvature of the spine.
    • Temporalmandibular Joint (TMJ) Disorder: Pain/tenderness with palpation that increases with chewing; palpable joint swelling.
  • Transient Ischemic Attack (TIA): Defined as focal brain, spinal cord, or retinal ischemia without acute infarction.

HEMATOLOGY AND IMMUNOLOGY

  • Anemia Classifications:
    • Microcytic Hypochromic Anemia (Iron Deficiency): Elevated RDW (15\text{%}); first labs should be TIBC and Ferritin. Absorption of ferrous sulfate is augmented by Vitamin C.
    • Thalassemia: Microcytic anemia with normal RDW in a patient of Mediterranean descent; confirmed via gel electrophoresis.
    • Macrocytic Anemia: Should be evaluated for Vitamin B12 levels. Often seen in chronic alcoholism where MCV and MCH are elevated.
    • Anemia of Chronic Disease: In ESRD, results typically show normal MCH and low Hemoglobin (e.g., 9.6 g/dL9.6\text{ g/dL}).
  • Thrombocytopenia: Defined as a low platelet count (e.g., 80,00080,000).
  • Hepatitis A Immunoglobulins: IgM is the first to elevate in acute infection; IgG is elevated in past infections (e.g., one year later).
  • Hypersensitivity: A type 1 IgE-mediated reaction (e.g., bee sting with facial swelling) is treated with Epinephrine, Prednisone, and Diphenhydramine (Benadryl).
  • HIV Management: A patient is considered well-managed with a CD4 count of 500 and undetectable viral copies.

PSYCHIATRY AND MENTAL HEALTH

  • Mental Status Descriptors:
    • Lethargic: Patient appears drowsy, opens eyes and looks at the provider when questioned, answers appropriately, but nearly falls asleep while sitting.
  • Disorders:
    • Borderline Personality Disorder: Fear of abandonment, intense interpersonal relationships, affective instability, and recurrent self-harm.
    • Post-Traumatic Stress Disorder (PTSD): Manifested by hyper-vigilance (e.g., needing to face the door) and exposure to trauma. First-line management is Selective Serotonin Reuptake Inhibitors (SSRIs).
    • Bipolar Disorder: Cyclical nature of euphoria/bliss followed by troughs of depression/anhedonia.
  • Neurotransmitters: Depression is primarily associated with a deficit in Serotonin.
  • Hallucinations: Sm