FINAL

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Myocardial Infarction (MI) Treatments and Clinical Interventions

Acute Management and Revascularization

• Percutaneous Coronary Intervention (PCI): This procedure involves balloon angioplasty to mechanically open a blocked coronary artery. It frequently involves the placement of a stent to maintain vessel patency.

• Thrombolytics (Fibrinolytics): Known colloquially as "Clot Busters," these medications pharmacologicaly dissolve the thrombus causing the Myocardial Infarction.

• Coronary Artery Bypass Graft (CABG): A surgical intervention reserved for severe arterial blockages. It establishes a novel pathway for blood flow by utilizing vascular grafts to bypass the obstruction.

Pharmacological Therapy

• Antiplatelets: Medications such as Aspirin or Clopidogrel (Plavix) used to prevent further platelet aggregation.

• Nitrates: Specifically Nitroglycerin, used for coronary vasodilation.

• Beta Blockers: Used to reduce sympathetic stimulation of the heart.

• ACE Inhibitors: Utilized to decrease the overall workload of the heart.

• Statins: Prescribed to lower systemic cholesterol levels and stabilize plaques.

• Vasodilators: Employed to improve systemic circulation.

• Anti-arrhythmics: Administered to treat or prevent abnormal heart rhythms associated with cardiac ischemia.

• Morphine Sulfate: Used primarily for advanced pain control and reduction of myocardial oxygen demand.

Gout: Etiology and Clinical Management

Etiological Factors

• Definition: A connective tissue disorder resulting from the systemic accumulation of uric acid and the subsequent formation of urate crystals within joints.

• Pathophysiology: Uric acid is the metabolic waste product derived from the breakdown of purine proteins.

• Classification:     * Primary Gout: An inherited metabolic dysfunction regarding purine processing.     * Secondary Gout: Triggered by concurrent health conditions or specific pharmacological agents.

Therapeutic Interventions

• Acute Phase Management:     * NSAIDs and Colchicine: These agents are utilized to decrease acute inflammation.

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Long-Term Gout Management

• Prevention:     * Allopurinol: A standard pharmacological treatment used for chronic uric acid reduction.

• Diagnostic Testing: Includes Serum uric acid levels and the examination of joint fluid for urate crystals.

• Dietary and Lifestyle Modifications:     * Restrictions: Avoid foods high in purines, aspirin, diuretics, alcohol, and high-stress environments.     * Recommendations: Consume cherries and cherry juice; increase fluid intake significantly to prevent the formation of kidney stones.

Polycystic Kidney Disease (PKD)

Pathophysiology and Manifestations

• Hereditary Nature: PKD is a genetic disorder characterized by the development of multiple cysts within the kidneys.

• Signs and Symptoms:     * Persistent dull heaviness in the flank or back area.     * Hematuria (blood in the urine).     * Secondary Hypertension.     * Recurrent Urinary Tract Infections (UTI).

• Clinical Course: The disease is progressive. Currently, there is no definitive treatment to halt cyst formation.

Osteomyelitis

Etiology and Stages

• Pathophysiology: A bacterial bone infection that leads to localized inflammation, which subsequently decreases blood flow. This ischemia results in bone necrosis (death of bone tissue), further exacerbating the infection.

• Classification:     * Acute Osteomyelitis: Infection lasting less than $4$ weeks.     * Chronic Osteomyelitis: Infection persisting for greater than $4$ weeks.

• Risk Factors: Recent injuries that may have introduced bacteria directly into the bone.

Clinical Manifestations

• Localized pain at the site of infection.

• Erythema (redness), warmth, and edema (swelling).

• Systemic fever.

• Purulent drainage.

• Formation of fistulas and calluses in chronic cases.

Therapeutic Management

• Prevention: Primary focus on hand hygiene, sterile dressing changes, and appropriate antibiotic prophylaxis.

• Curative Therapy: Involves surgical debridement and reconstructive procedures.

• Palliative Therapy: Focused on chronic suppressive antibiotic therapy.

• Nonresponsive Cases: If the infection fails to respond to treatment, amputation of the affected limb may be necessary.

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Carpal Tunnel Syndrome

Etiology and Clinical Presentation

• Pathophysiology: Compression of the median nerve as it passes through the carpal tunnel in the wrist.

• Signs and Symptoms: Numbness, tingling sensations in the fingers, localized hand pain, and a measurably weak grip.

Management and Prevention

• Acute Treatment: Rest and splinting of the wrist for $1$ to $2$ weeks, along with anti-inflammatory medications.

• Surgical Intervention: Decompression surgery when conservative management fails.

• Prevention Strategies: Avoid overuse of the wrist and maintain a straight wrist posture during repetitive tasks.

Thrombocytopenia

Definition and Manifestations

• Pathophysiology: A clinical state characterized by a low platelet count. Given that platelets are essential for hemostasis (clotting), fewer platelets significantly increase the risk of hemorrhage.

• Signs and Symptoms (S/S):     * Easy bruising and the presence of Petechiae (small red or purple pinpoint dots on the skin).     * Prolonged bleeding from minor injuries.     * Epistaxis (nosebleeds) and bleeding gums.     * Menorrhagia (heavy or prolonged menstrual bleeding).     * Hematuria or hematochezia (blood in urine or stool).     * Oozing from intravenous sites or surgical wounds.     * Fatigue resulting from chronic blood loss in severe cases.

Patient Safety Interventions

• Utilization of proper footwear to prevent injury.

• Use of a soft-bristled toothbrush.

• Absolute avoidance of contact sports.

Etiological Factors

• Decreased Platelet Production:     * Bone marrow disorders.     * Effects of chemotherapy or radiation.     * Aplastic anemia.     * Vitamin $B_{12}$ or folate deficiency.     * Chronic alcohol abuse.

• Increased Platelet Destruction:     * Immune Thrombocytopenia (ITP).     * Heparin-Induced Thrombocytopenia (HIT).     * Autoimmune diseases such as Systemic Lupus Erythematosus (SLE).     * Viral infections.

• Increased Platelet Consumption:

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Advanced Causes and Risks of Thrombocytopenia

• Consumption Disorders: Disseminated Intravascular Coagulation (DIC), severe hemorrhage, or Sepsis.

• Sequestration: Platelets becoming trapped within an enlarged spleen (Splenomegaly).

• Life-Threatening Complications: The primary danger is severe internal bleeding, specifically intracranial hemorrhage.

Cholecystitis and Associated Complications

Pathophysiology

• Usually precipitated by a gallstone (cholelithiasis) obstructing the cystic duct.

• This obstruction prevents bile outflow, leading to bile buildup, irritation, and significant inflammation of the gallbladder walls.

Significant Complications

• Infection: Trapped bile serves as a medium for bacterial growth, which can spread systemically.

• Gallbladder Rupture: Severe inflammation weakens the wall, leading to bile leakage into the abdominal cavity—a surgical emergency.

• Peritonitis: Inflammation and infection of the abdominal lining (peritoneum), causing a rigid abdomen and extreme pain.

• Abscesses: Pockets of pus around the gallbladder that may lead to Sepsis.

• Sepsis: A life-threatening systemic infection entering the bloodstream.

• Pancreatitis: Occurs when a gallstone blocks the pancreatic duct; symptoms include extreme pain in the Left Upper Quadrant (LUQ).

• Jaundice: Occurs when bile backs up into the bloodstream, manifesting as yellowing of the skin and sclera (eyes).

Pancreatitis: Etiology and Diagnostics

Pathophysiology of Autodigestion

• The inflamed pancreas releases digestive enzymes (amylase and lipase) prematurely.

• The organ begins a process of autodigestion; elevated levels of trypsin, lipase, and amylase cause localized bleeding and tissue damage.

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Clinical Presentation and Laboratory Analysis

• Signs and Symptoms: Severe abdominal pain, guarding of the abdomen, shallow respirations (due to pain), and epigastric pain radiating to the left side.

• Key Laboratory Values:     * Amylase: Normal range is approximately $100-300\,U/L$. In pancreatitis, this value is elevated.     * Lipase: Normal range is approximately $0-60\,U/L$. In clinical pancreatitis, lipase levels typically exceed three times ($3\times$) the normal values.

• Clinical Intervention: Aggressive administration of intravenous (IV) fluids.

Hyperthyroidism Assessment

Diagnostic Testing

• Primary Hyperthyroidism: Characterized by excessive Thyroid Hormone ($TH$) with high $T_3$ and $T_4$ levels.

• Secondary Hyperthyroidism: Caused by excessive Thyroid Stimulating Hormone ($TSH$), also resulting in high $T_3$ and $T_4$ levels.

• Common Causes: Graves’ Disease (often presenting with Exophthalmos), levothyroxine overdose, pituitary tumors, adenomas, and thyroiditis.

• Signs and Symptoms: Rapid weight loss, heat intolerance, tachycardia, tremors, and anxiety.

Corticosteroids: Adverse Effects

Systemic Side Effects

• Weight gain and increased appetite.

• Insomnia.

• Hyperglycemia (high blood sugar) and Hypertension (high blood pressure).

• Increased skin fragility and easy bruising.

• Development of "Moon Face."

• Immunosuppression: Increased risk for infection. Patients effectively lack a robust immune system while on therapy and should avoid large crowds.

• Critical Warning: Medications should never be stopped abruptly; they require a gradual taper.

Diabetes Mellitus Diagnostic Testing

• A1C (Glycated Hemoglobin): Measures the average blood glucose concentration over the preceding $2-3$ months. Fasting is not required.

• Fasting Plasma Glucose (FPG): Measures blood sugar after a fast of at least $7$ hours, typically performed in the morning.

• Oral Glucose Tolerance Test (OGTT): Measures response before and $2$ hours after consuming a standardized sugary liquid; requires a fast.

Diabetes Mellitus vs. Diabetes Insipidus

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Diabetes Mellitus (DM)

• Etiology: Glucose remains in the blood rather than entering cells, leading to Hyperglycemia.

• Signs and Symptoms (The 3 P's):     * Polyuria: Excessive urination.     * Polydipsia: Excessive thirst.     * Polyphagia: Excessive hunger.

• Diagnostic Markers: Increased $A1C$ levels.

• Major Complications: Diabetic Ketoacidosis (DKA), which is a medical emergency primarily associated with Type 1 Diabetes.

• Type 1 Diabetes: Characterized by zero insulin production by the pancreas. Requires insulin therapy and the avoidance of wide swings in blood glucose levels.

• Type 2 Diabetes: Characterized by insulin resistance. Management focuses on controlling blood pressure, weight, and lipids; insulin and oral hypoglycemics are potential treatments.

• Glucagon: A hormone used to raise blood sugar by initiating the release of stored glucose.

Diabetes Insipidus (DI): The "Water Problem"

• Definition: A condition where the body lacks sufficient Antidiuretic Hormone ($ADH$) or the kidneys do not respond to it. $ADH$ normally signals the kidneys to conserve water; without it, the kidneys excrete large amounts of very dilute urine.

• Classification:     * Central DI: Insufficient $ADH$ production due to brain issues (injury, surgery, tumor).     * Nephrogenic DI: The kidneys are non-responsive to existing $ADH$.

• Signs and Symptoms:     * High output of clear, dilute urine.     * Intense Polydipsia (thirst).     * Dehydration and dry mucous membranes.     * Hypotension and Tachycardia.

• Laboratory Values:     * Hypernatremia: High serum sodium levels.     * Urine Specific Gravity: Very low (indicating highly dilute urine).

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• Differential Diagnosis: Normal blood glucose levels distinguish DI from Diabetes Mellitus.

• Acute Risks: Severe dehydration, electrolyte imbalances, and potential hypovolemic shock.

• Treatment: Administration of Desmopressin (DDAVP) for Central DI and aggressive fluid replacement (oral or IV) while treating the underlying cause.

Metabolic Fuel: Glucose and Glucagon

The Role of Glucose

• Glucose is the primary energy source for cellular function and muscular movement. It is derived from carbohydrates and converted into blood sugar. Excess is stored in the liver and muscles as Glycogen.

The Role of Glucagon

• Glucagon acts as a counter-regulatory partner to insulin. It is used to treat severe hypoglycemia by stimulating the liver to release stored glucose into the bloodstream.

Urinary Tract Infections: E. Coli

• Predisposing Factors: $E. coli$ is identified as the most common causative agent for Urinary Tract Infections (UTIs).

Osteoporosis and Mineral Balance

Etiology and Pathophysiology

• A metabolic disorder characterized by low bone mass and bone tissue degeneration. This leads to fragile bones and a significantly high risk for fractures (most commonly in the spine, wrist, or hip).

• Risks: Excessive alcohol, caffeine, sodium, or protein intake; smoking; and low intake of Calcium and Vitamin $D$.

• Hormonal Influence: Low levels of testosterone and estrogen, particularly in post-menopausal women.

Diagnostics and Manifestations

• Laboratory Tests: Decreased Calcium and Vitamin $D$; increased Phosphorus.

• Imaging: DEXA scan.

• S/S: Back pain, loss of height, frequent fractures, and Kyphosis.

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Pharmacological Management of Osteoporosis

• Calcitonin: Functions to drive calcium from the blood back into the bone tissue.

• Bisphosphonates: Includes medications such as Reclast and Alendronate.

Nursing Interventions: Stress Incontinence

• Definition: Involuntary urine loss triggered by increased intra-abdominal pressure (e.g., coughing, laughing, sneezing).

• Interventions:     * Pelvic Floor Training: Kegel exercises.     * Fluid Management: Monitoring intake.     * Irritant Avoidance: Eliminating caffeine, alcohol, and carbonated beverages.     * Toileting Programs: Implementing scheduled or prompted voiding.

Carcinogenesis: Initiation vs. Promotion

• These processes are linked to the growth and reproduction of cancer cells following exposure to carcinogens.

• Initiation: The initial permanent alteration in the cell's $DNA$.

• Promotion: The stage where the cell is continuously affected by the carcinogen, facilitating further growth.

Nephrolithiasis: Kidney Stones

Pathophysiology and General Facts

• Stones form when urine becomes overly concentrated, causing salts and crystals to clump together in the kidney, ureter, or bladder.

• Small stones ( < 5\,mm ) typically pass spontaneously. Larger stones require clinical intervention.

Types of Stones

• Calcium Oxalate: The most common type. Linked to diet, dehydration, and concentrated urine.

• Uric Acid Stone: Resulting from high uric acid levels (gout or high protein diets). Common in acidic urine.

• Struvite Stone:

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• Struvite (continued): Triggered by UTIs where bacteria make the urine alkaline. These grow rapidly and are more common in women.

• Cystine Stone: A rare type caused by a genetic disorder where the body leaks excessive cystine into the urine.

Demographic Risks and Clinical Presentation

• Risks: Family history, obesity, male gender, high salt/sugar/protein diet, and chronic dehydration.

• Signs/Symptoms (Renal Colic): Flank or back pain, severe cramping, dysuria (burning with urination), hematuria, urgency, frequency, enuresis, and nausea/vomiting.

Diagnostics and Prevention

• Prevention: High water intake, regular exercise, and a diet low in salt and protein.

• Diagnostic Tests: Urinalysis (to check for blood, crystals, or infection), CT Scan, Renal/Abdominal Ultrasound, and intravenous pyelogram (IVP).

Hepatitis A (HAV)

• Transmission: Oral-fecal contamination through food or water.

• Primary Prevention: Hand hygiene.

• Vaccination Information: The immune system develops antibodies; the HAV vaccine provides protection.

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Organ Transplant Rejection: Lymphocytes

Mechanism of Rejection

• Lymphocytes (white blood cells) are designed to distinguish "self" from "non-self."

• A transplanted organ is recognized as foreign (an invader).

• Lymphocytes attack the tissue, causing inflammation and damage, which decreases blood flow to the organ and degrades its function.

Clinical Manifestations of Rejection

• Fever and fatigue.

• Pain, tenderness, swelling, redness, or warmth at the transplant site.

• Measurable decrease in the transplanted organ's function.

Surgical Classifications: Curative vs. Palliative

• Curative Surgery:     * Goal: To completely remove or cure the disease/problem at the source.     * Outcome: Expectation of a disease-free state post-recovery.

• Palliative Surgery:     * Goal: To relieve symptoms and improve quality of life/comfort.     * Outcome: The disease remains, but the associated symptoms are reduced.

HAART and AIDS Management

Antiretroviral Therapy (ART)

• Also known as HAART (Highly Active Antiretroviral Therapy).

• Goals: Reduce viral load, improve immune function (marked by $CD4$ counts), and halt progression to AIDS.

• Mechanism: Suppresses viral replication; it is not a cure.

• Adherence: Missing doses can lead to drug resistance. Education on strict adherence is vital.

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HIV vs. AIDS Definitions

• HIV: The virus that can eventually lead to AIDS.

• AIDS (Acquired Immunodeficiency Syndrome) Diagnosis: Diagnosed when the $CD4$ cell count falls below $200\,cells/mm^3$ or when opportunistic infections occur.

• Note: Every person with AIDS has HIV, but not every HIV patient progresses to AIDS.

Clinical Markers and Timeline

• CD4 Ranges: Healthy counts are above $500\,cells/mm^3$. Below $200$ indicates severe immunosuppression.

• Opportunistic Infections: Common examples include Pneumocystis pneumonia, Herpes infections, and Kaposi's sarcoma.

• Timeline: Without treatment, progression to AIDS can take $10$ or more years.

Transurethral Resection of the Prostate (TURP)

• Procedure: A resectoscope is inserted into the urethra to shave away overgrown prostatic tissue.

• Post-Operative Monitoring: If bright red urine with clots is observed, the nurse must increase the irrigation rate.

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Viral Rhinitis (Common Cold)

• Pathophysiology: Inflammation of the mucous membranes in the nose, throat, and airways following exposure to allergens or viruses.

• S/S: Sneezing, congestion, rhinorrhea (runny nose), watery eyes, and an itchy throat.

• Management: Rest, increased fluids, decongestants, antihistamines, and mast cell stabilizers.

• Common inhalants: Montelukast (Singulair) and Atrovent.

Celiac Disease Diet

• Prescription: A high-calorie, high-protein, and strictly gluten-free diet.

• Avoidance: All foods containing wheat, barley, or rye.

• Consultation: Dietitian referral is standard.

Comprehensive Comparison: DI vs. SIADH

Diabetes Insipidus (DI) - "DRY INSIDE"

• Problem: Insufficient $ADH$.

• Volume Status: Hypovolemia (Dehydration).

• Urine Output: High ($3-15\,L/day$).

• Urine Concentration: Dilute (Specific Gravity < 1.005).

• Serum Markers: Hypernatremia (High Sodium) and High Serum Osmolality.

• Signs: Polyuria, polydipsia, dry mucous membranes, hypotension, and tachycardia.

• Neurological: Decreased Level of Consciousness (LOC) due to dehydration/shock.

• Major Danger: Hypovolemic Shock.

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SIADH (Syndrome of Inappropriate Antidiuretic Hormone) - "SOAKED INSIDE"

• Problem: Excessive $ADH$ production.

• Volume Status: Hypervolemia (Fluid Overload).

• Urine Output: Low.

• Urine Concentration: Highly concentrated (Specific Gravity > 1.030).

• Serum Markers: Hyponatremia (Low Sodium) and Low Serum Osmolality.

• Signs: Edema, rapid weight gain, confusion, headache, nausea, and muscle cramps.

• Neurological: Brain swelling leading to seizures and coma.

• Major Danger: Cerebral Edema.

Guillain-Barre Syndrome

• Pathophysiology: An acute inflammatory condition where muscle weakness typically begins in the feet and ascends upward.

• Stages:     * Stage 1: Weakness in the feet on both sides (bilateral).     * Stage 2: Plateauing of symptoms where the weakness stops ascending.

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Clinical Management of Guillain-Barre

• Monitoring: Continuous assessment of respiratory status is paramount.

• Labs: Periodic Arterial Blood Gas (ABG) analysis.

• Recovery: Can take up to $2$ years. Onset usually occurs between ages $30-50$. Affects men and women equally.

Peripheral Neuropathy

• Etiology: Damage to peripheral nerves, commonly caused by Diabetes or chronic infections.

• Manifestations: Weakness, numbness, and pain, usually localized in the hands and feet.

• Focus: Treating the underlying cause and symptom relief.

Bell’s Palsy

• Definition: Temporary paralysis or weakness of the muscles on one side of the face. Clinical Rule: Assume a stroke has occurred until proven otherwise.

• S/S: Drooping of the mouth, drooling, inability to close the eye on the affected side, and excessive tearing.

• Nerve Involvement: Inflammation of Cranial Nerve $VII$ (Facial Nerve), which monitors taste and facial expressions.

• Treatment: Temporary eye protection for the affected side.

Neurovascular Checks

• Assessment Steps:     1. Circulation     2. Color (check for pallor)     3. Movement     4. Sensation     5. Capillary Refill (watch for delays)

• Context: Performed post-operatively on hips, legs, or arms.

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Nerve Compression: Herniated Disk

• Etiology: Compression of nerve roots due to injury or idiopathic causes.

• Manifestations: Muscle spasms, numbness/tingling in extremities, muscle weakness, atrophy (muscle swelling followed by tissue death), and pain.

• Interventions: Bed rest, muscle relaxants, and NSAIDs as first-line anti-inflammatories. Epidural anesthetics with steroids may be used.

Skin Integrity: Blanching and Pressure Sores

• Blanching: If a reddened area turns white when pressed and then returns to pink/red, blood is still circulating.

• Non-blanchable erythema: The skin stays dark/red even after pressure. This is a primary sign of a Stage 1 Pressure Sore, usually over bony prominences like the sacrum, hips, or heels.

Multiple Sclerosis (MS) Onset

• destruction of the myleon

• Character: Symptoms are typically gradual.

• S/S: Muscle weakness, numbness, chronic fatigue, slurred speech, vision disturbances (typically one eye at a time), vertigo, ataxia, dysphagia, and bowel/bladder dysfunction.

Sickle Cell Disease and Vascular Occlusion

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Pathophysiology and Genetics

• Genetics: An autosomal recessive disorder (both parents must contribute the gene; one parent makes the child a carrier).

• Cell Life-cycle: Sickle-shaped Red Blood Cells (RBCs) last only $10-20$ days, compared to the normal $3$ months (90 days).

• Mechanism: RBCs sickle due to hemoglobin's sensitivity to decreased Oxygen ($O_2$) levels.

• vaso occlusive symptom = severe joint pain and abdomen pain caused by the blockages in blood vessels, leading to reduced blood flow and oxygen delivery to tissues.

Diagnostic Testing

• Sickledex Test: Screens for abnormalities during periods of low oxygen saturation.

• Hemoglobin Electrophoresis: Identifies the specific hemoglobin type associated with sickle cell.

• CBC: Shows decreased WBC, hemoglobin, and hematocrit.

• ESR (Erythrocyte Sedimentation Rate): Found to be decreased.

Clinical Management

• Treatment: Bone Marrow Transplant (definitive), Hydroxyurea (to reduce crisis frequency), and aggressive IV fluids to stop the sickling process.

• Prevention: Avoid cold exposure and strenuous exercise, stress, tight clothing

Leukemia Complications

Pathophysiology and General Types

• Leukemia: Cancer of the WBCs characterized by a massive increase in immature, non-functioning white cells. Risk factors include viruses, smoking, Down syndrome, radiation, and chemotherapy.

• Types:     

• * Acute Lymphocytic Leukemia (ALL): Sudden onset; most common in children.

•  * Acute Myelogenous Leukemia (AML): Poor prognosis; affects older individuals.     

• * Chronic Lymphocytic Leukemia (CLL): Slow development; most common adult type.     

• * Chronic Myelogenous Leukemia (CML): Occurs in older adults.

Clinical Features of Leukemia

• Fever, infection, and malaise.

• Pallor, tachycardia, palpitations, and dyspnea.

• Abdominal pain and sternal/rib pain.

• CNS changes and bleeding tendencies.

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Diagnostics for Leukemia

• CBC, bone marrow aspiration, lumbar puncture, and genetic analysis.

Hypertension (HTN)

Diagnostic Thresholds

• Normal: < 120 / < 80\,mmHg

• Elevated: 120-129 / < 80\,mmHg

• Stage 1: $130-139 / 80-89\,mmHg$

• Stage 2: $\ge 140 / \ge 90\,mmHg$

• Types: Primary (idiopathic/no known cause) and Secondary (caused by another condition).

Pharmacological Management and Risks

• Medications: Diuretics, ACE inhibitors, ARBs, Beta blockers, and Calcium channel blockers.

• Complications: Heart attack, stroke, heart failure, kidney failure, and atherosclerosis.

• Hypertensive Emergency: Blood pressure higher than $180 / 120\,mmHg$ accompanied by organ damage; requires immediate treatment.

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Heart Failure (HF) Etiology and Symptoms

Right-Sided Heart Failure

• Primary Cause: Often caused by left-sided failure.

• Mechanism: Right ventricle fails; blood backs up into the systemic circulation.

• Symptoms: Peripheral edema, weight gain, Jugular Vein Distention (JVD), enlarged liver/spleen (hepatomegaly/splenomegaly), and Ascites.

Left-Sided Heart Failure

• Primary Cause: Uncontrolled hypertension.

• Mechanism: Left ventricle fails; blood backs up into the pulmonary circulation (lungs).

• Symptoms: Shortness of breath (SOB), crackles in lungs, cough, pulmonary edema, orthopnea, and fatigue.

General Etiology

• Coronary artery disease, hypertension, myocardial infarction, cardiomyopathy, and valve disorders.

Arterial Blood Gas (ABG) and Acid-Base Balance

Respiratory Imbalances

• Respiratory Acidosis: Caused by hypoventilation (pulmonary disease). Rapid accumulation of $CO_2$ and Hydrogen ions lowers the pH.

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• Respiratory Alkalosis: Caused by hyperventilation. Rapid elimination of $CO_2$ leads to fewer Hydrogen ions and an increased pH.

Metabolic Imbalances

• Metabolic Acidosis: Associated with Diabetes, Diarrhea, and Kidney disease.

• Metabolic Alkalosis: Associated with high Tums (antacid) intake or severe vomiting.

Asthma: Pathophysiology and Treatment

Clinical Characteristics

• Characterized by inflammation of the bronchial mucosa, bronchospasms, mucosal edema, and air trapping. It is usually reversible but can lead to long-term airway remodeling if uncontrolled.

• Triggers: Smoking, allergens, infection, sinusitis, stress, and certain medications.

• S/S: SOB, wheezing, cough, and sputum production (worsens at night).

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Status Asthmaticus

• A severe, prolonged asthma attack non-responsive to typical medications. Leads to worsening hypoxia. It begins with respiratory alkalosis and progresses to respiratory acidosis.

Therapeutic Interventions

• Short-acting: Albuterol (short-acting bronchodilator).

• Long-acting/Maintenance: Inhaled corticosteroids (Advair—must rinse mouth after use) and long-acting bronchodilators.

• Acute Management: Oxygen, IV corticosteroids, and nebulized bronchodilators.

Legal Concepts in Healthcare

• Malpractice: Negligence performed by a licensed professional who fails to meet the standard of care despite knowing how to perform the task. Example: Administering the wrong dose.

• Negligence: A general failure to act with reasonable care, often unintentional. Example: Forgetting to raise bed rails leading to a fall.

• TIME OUT: A protocol where all surgical staff pause to ensure everyone is synchronized regarding the patient and procedure.

Untreated End-Stage Renal Failure (ESRF)

Physiological Breakdown

• The kidneys fail to filter waste, balance electrolytes, control blood pressure, or produce urine.

• Uremia: The systemic buildup of urea in the blood.

• Systemic Failures: Fluid overload, hyperkalemia (high potassium), and toxicity affecting the brain, heart, and lungs.

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S/S and Dangers of ESRF

• Minimal to no urine output, edema, SOB, fatigue, nausea, metallic taste/bad breath, pruritus (itching), and decreased LOC.

• Greatest Threat: Death due to hyperkalemia, fluid overload, or systemic toxin build-up.

Idiopathic Autoimmune Hemolytic Anemia

• Laboratory Findings:     * $\downarrow$ Hemoglobin and Hematocrit.     * $\downarrow$ RBC count.     * $\uparrow$ Reticulocyte count (bone marrow compensation).     * $\uparrow$ LDH (Lactate Dehydrogenase) from cell lysis.     * $\uparrow$ Indirect Bilirubin (causing jaundice).     * $\downarrow$ Haptoglobin.     * Direct Coombs Test (DAT): Must be positive to confirm autoimmune destruction.

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Gastrointestinal and Immunological Notes

Ileostomy

• Surgical stoma using the ileum. Output is typically liquid and continuous. High fluid intake is required.

Functions of the Spleen

• Filters blood, destroys old platelets and RBCs, produces lymphocytes/WBCs, stores platelets, and assists in bilirubin formation.

Contact Dermatitis

• A Type $4$ hypersensitivity reaction (delayed). Symptoms occur upon second exposure to chemicals (Poison ivy, oak, latex).

• Treatment: Antihistamines, corticosteroids, washing with brown soap (Fels-Naptha), and baking soda/Aveeno baths.

Isolation Precautions

• Standard: All patients, all the time.

• Contact: For direct/indirect infections like $C. diff$ (gown and gloves).

• Droplet: For respiratory droplets like Influenza (surgical mask).

• Airborne: For small particles like TB (N95 mask).

Cardioversion vs. Defibrillation

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Clinical Use of Electrical Therapy

• Cardioversion: Used for patients with a pulse; requires sedation due to pain.

• Defibrillation: Emergency use for patients without a pulse (V-fib or Pulseless VT).  

• Asystole: Requires CPR, not a shock.

Organ Transplant Rejection Signs

• Fever of $101^{\circ}F$ or higher.

• Chronic antirejection medication is required for life.

Standard Laboratory Values

Electrolytes

• Sodium: $135-145\,mEq/L$

• Potassium: $3.5-5.0\,mEq/L$

• Chloride: $98-106\,mEq/L$

• Calcium: $9.0-10.5\,mEq/L$

• Magnesium: $1.3-2.1\,mEq/L$

• triglicerides <150

• hdl >60

• ldl <100

• total cholesterol <200

Metabolic and Renal

• Fasting Glucose: $70-110\,mg/dL$

• BUN: $10-20\,mg/dL$

• Creatinine: $0.6-1.2\,mg/dL$

Hematology

• WBC: $4.5-11.0 \times 10^3$

• Hgb: $14-18\,g/dL$

• Platelets: $150,000-350,000$

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Liver Function

• Albumin: $3.5-5.0\,g/dL$

• Alkaline Phosphatase: $50-100\,U/L$

Total Bilirubin: $0.2-1.2\,mg/dL$

• PT = 11-13.5 SEC

• INR = 2-3

  • ON WARFRIN = 2.5 - 3.5

• PTT = HEPARIN = 1.5- 2.5

Specific Cancers

Oral and Throat Cancer

• Risks: Tobacco, Alcohol, HPV.

• S/S: Non-healing mouth sores, leukoplakia (white patches), hoarseness, dysphagia, and neck lumps.

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Esophageal and Lung Cancer

• Esophageal Risks: Chronic GERD, Barrett's esophagus. Manifests as progressive dysphagia.

• Lung Cancer Diagnostic: Chest X-ray, CT, Sputum analysis, biopsy.

• Paraneoplastic Syndromes: SIADH (leading to high ADH and hyponatremia) or Cushing Syndrome (too much ACTH).

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COPD and Emphysema

• Chronic Bronchitis: Inflammation and cough lasting $\ge 3$ months for $2$ consecutive years.

• Emphysema: Destruction of alveolar walls leading to a "barrel chest."

• Positioning: High Fowlers, leaning forward.

Blood Transfusion

• Products: Packed RBCs, Platelets, Albumin (pulls fluid into intravascular space), Plasma.

• Safety: Assessment, ID check, only use Normal Saline ($0.9\%\,NaCl$).

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Transfusion Reactions

• Febrile: Temp increase of $1^{\circ}$. Most common ($2\%$).

• Urticarial: Hives.

• Hemolytic: Immune system clumps and attacks RBCs (severe).

• Anaphylactic: Swelling of face/tongue. Emergency treatment: Oxygen, Epinephrine, Corticosteroids.

Lymphoma: Hodgkin’s vs. Non-Hodgkin’s

• Hodgkin’s: Contains Reed-Sternberg Cells. Pain induced by alcohol. Staging: Stage 1 (one node) to Stage 4 (disseminated).

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• Non-Hodgkin’s: No Reed-Sternberg cells. More common in individuals > 60 . Poorer prognosis.

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Traction and Other Hematologic Disorders

• Skeletal Traction: Weights must hang freely. Uses a trapeze bar for movement.

• Polycythemia: Overabundance of RBCs. Hgb > 18\,mg/dL , Hct > 55\% . Blood is thick and viscous.

• OPSI: Overwhelming Post Splenectomy Infection. Rare but can lead to sepsis post-procedure.

• Hemophilia:     * Type A: Factor $VIII$ (8) deficiency.     * Type B: Factor $IX$ (9) deficiency.

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Appendicitis and Lupus

• Systemic Lupus Erythematosus (SLE): Butterfly rash, arthritis. Avoid sunlight and stress.

• Appendicitis: Pain at McBurney’s Point (RLQ). Rebound tenderness. Rupture leads to Peritonitis.

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Parkinson’s Disease

• Pathophysiology: Destruction of substantia nigra leading to Decreased Dopamine and Increased Acetylcholine.

• TRAP Symptoms:     * T: Tremor (pill-rolling).     * R: Rigidity (cogwheel).     * A: Akinesia/Bradykinesia (slow movement).     * P: Postural Instability.

• Meds: Levodopa/Carbidopa, MAO-B inhibitors, Anticholinergics (to reduce tremor).

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Phases of a Seizure

1. Prodromal: Hours to days before; confusion, mood changes.

2. Aura: Seconds before; odd smells or tastes.

3. Ictal: The active seizure phase.    

4. Status Epilepticus: Emergency phase lasting > 5 minutes.

5. Postictal: Recovery phase; lethargy, sleepiness, headache.