hepatic

Liver Anatomy and Function

  • The liver performs various vital functions important for human health.
    • Detoxification: Removes potentially toxic byproducts of certain medications.
    • Storage:
    • Prevents shortages of nutrients by storing vitamins, minerals, and sugar.
    • Metabolism:
    • Metabolizes (breaks down) nutrients from food to produce energy when needed.
    • Protein Production: Produces most proteins needed by the body.
    • Immune Function: Helps the body fight infection by removing bacteria from the blood.
    • Blood Clotting Regulation: Produces most substances that regulate blood clotting.
    • Bile Production: Produces bile, necessary for digesting fats and absorbing fat-soluble vitamins A, D, E, and K.

Liver Function Tests (LFT)

  • Classification of Tests:
    • Tests based on excretory function.
    • Tests based on synthetic function.
    • Enzymes.
    • Tests based on detoxification function.
  • Common LFTs Include:
    • Serum bilirubin (total, conjugated, unconjugated).
    • Serum total protein, albumin, globulin, A/G ratio.
    • Urine tests for bilirubin, bile salts, urobilinogen.
    • Key enzymes:
    • Alanine aminotransferase (ALT)
    • Aspartate aminotransferase (AST)
    • Alkaline phosphatase (ALP)
    • Gamma-glutamyl transferase (GGT)
    • Blood ammonia levels and Prothrombin Time (PT).
    • Imaging (USG, CT, MRI) and biopsy for diagnosis.

Hepatitis Overview

  • Definition: Inflammation of the liver.
  • Causes:
    • Viral infections (A, B, C, D, E).
    • Substances (e.g., alcohol, medications, chemicals).
    • Autoimmune diseases and metabolic abnormalities.
  • Types: Acute vs. Chronic; Alcohol (ETOH) is a leading cause.

Hepatitis A

  • Mode of Transmission:
    • Fecal-oral route (contaminated food/drink)
    • Poor hygiene and sanitation.
  • At Risk Groups:
    • Individuals in unsanitary conditions, developing countries, drug users, unprotected sexual intercourse, large groups.
  • Clinical Course:
    • Found in feces 2 weeks prior to symptoms.
    • Presents with flu-like symptoms.
    • Self-limiting but may lead to acute liver failure.
  • Prevention:
    • Vaccine availability.
    • Proper handwashing/hygiene practices.
    • Immune globulin post-exposure.
  • Vaccination Recommendations: Given between ages 1 and 10.

Hepatitis B

  • Mode of Transmission:
    • Blood and bodily fluids.
    • Can survive on surfaces for up to 7 days.
    • Perinatal and percutaneous routes.
  • At Risk Groups:
    • IV drug users, unprotected sexual intercourse, healthcare workers, hemodialysis patients.
    • Can be transmitted from mother to baby.
  • Clinical Course:
    • Symptoms include flu-like signs.
    • May progress from acute to chronic hepatitis within 4-6 months.
  • Prevention:
    • Vaccine – 3 injections in a series.
    • Use of condoms, avoidance of sharing needles and equipment, adherence to standard precautions.

Hepatitis C

  • Mode of Transmission: Blood and bodily fluids via percutaneous routes.
  • At Risk Groups:
    • Similar to Hepatitis B: IV drug users, unprotected sexual intercourse, healthcare workers.
  • Clinical Course:
    • Symptoms may be asymptomatic or mild.
    • Leading cause of chronic liver disease and liver failure.
  • Prevention:
    • No vaccine available; screening of high-risk patients recommended.
    • Same precautions: condoms, disposable needles, standard precautions.

Hepatitis D

  • Mode of Transmission:
    • Percutaneous; requires Hepatitis B to replicate.
  • At Risk Groups: Same as Hepatitis B.
  • Clinical Course:
    • May be asymptomatic or lead to chronic conditions.
    • Can progress to acute liver failure.
  • Prevention:
    • Hepatitis B vaccine decreases risk of contracting Hepatitis D.

Hepatitis E

  • Mode of Transmission:
    • Fecal-oral transmission via contaminated water.
  • At Risk Groups:
    • Particularly prevalent in developing countries.
  • Clinical Course:
    • Abdominal pain, nausea/vomiting, jaundice; typically self-recovering.
  • Prevention:
    • Importance of hand washing, drinking bottled water, sanitation measures, and boiling water as necessary.

Alcohol-Induced Hepatitis

  • Description: Result of excessive alcohol consumption affecting liver function.
  • Drug-Induced Hepatitis:
    • Includes drug-induced liver injury, often related to medications like acetaminophen.
    • Overdose from Tylenol (e.g., 4000 mg/day) is notably dangerous.

Acute Hepatitis

  • Description: Characterized by destruction of hepatocytes but with potential for regeneration.
  • Duration: 1-6 months.
  • Symptoms:
    • May be asymptomatic or present with flu-like symptoms, nausea, vomiting, fatigue, jaundice, pruritus, and right upper quadrant (RUQ) pain.
  • Liver Function Tests: Elevated LFTs, bilirubin levels.

Acute Hepatitis Management

  • Supportive care:
    • Medications: antihistamines, antiemetics.
    • Nutrition tailored to patient needs (high-protein diet).
    • Advise against alcohol and rest for recovery.

Chronic Hepatitis

  • Description:
    • Persistent destruction of hepatocytes leads to scarring, fibrosis, and decreased liver function, potentially resulting in cirrhosis and liver failure.
  • At Risk Groups: Hepatitis B (prenatally acquired or children < 5 yo) and Hepatitis C.
  • Progression Factors:
    • Immunocompromised state, alcohol consumption, obesity, high cholesterol, hypertension, diabetes.

Chronic Hepatitis Clinical Manifestations

  • Symptoms include anemia, coagulation problems (increased bleeding), spider angiomas, palmar erythema, edema, ascites, possible hepatic encephalopathy, and elevated liver function tests (LFTs).

Chronic Hepatitis Management

  • Medications for Hepatitis B:
    • Nucleoside and Nucleotide Analogues to inhibit viral DNA replication, requiring long-term oral therapy.
    • Interferon therapy with flu-like side effects.
  • Medications for Hepatitis C:
    • Direct Acting Antivirals (DAAs) used for a 12-week oral therapy aimed at slowing disease progression to cirrhosis.

Chronic Hepatitis Nursing Care

  • Nursing actions include assessing pruritus, ensuring proper nutrition, monitoring lab values, and patient education on lifestyle changes.

Liver Diseases

  • Conditions affecting liver function include:
    • Wilson’s Disease
    • Nonalcoholic Fatty Liver Disease (NAFLD)
    • Nonalcoholic Steatohepatitis (NASH).
  • Genetic and Lifestyle Factors: Two diseases linked through mutations affecting copper metabolism and dietary habits.

Cirrhosis

  • Definition: End-stage liver condition where normal liver tissue is replaced by fibrous scar tissue.
  • Cause: Chronic disease, primarily alcohol-related in the US.

Underlying Pathophysiology of Cirrhosis

  • Hepatocyte Dysfunction:
    • Impaired bile flow and bilirubin conjugation lead to jaundice and hormone imbalances.
    • Decreased synthesis of albumin and clotting factors increases the risk of bleeding.
    • Ascites and peripheral edema are common due to decreased colloid osmotic pressure.
  • Portal Hypertension: Caused by damage leading to fibrotic tissue, resulting in increased pressure in the portal system and dysfunction of hepatocytes.

Cirrhosis Clinical Manifestations

  • Symptoms include jaundice, edema, ascites, spider angiomas, palmar erythema, anemia, and coagulation problems.

Cirrhosis Diagnostics

  • Elevated LFTs, increased bilirubin levels, low serum protein, and prolonged PT.
  • Endoscopy and liver biopsy are used for screening and definitive diagnosis, respectively.

Cirrhosis Complications

  • Portal Hypertension: Leads to esophageal and gastric varices, hepatic encephalopathy, and possibly kidney failure (hepatorenal syndrome).
    • Symptoms may include abdominal distention and risk for infections.

Ascites Management

  • Treatment includes sodium restriction, diuretics, albumin administration, and potential paracentesis for fluid removal.

Paracentesis Nursing Care

  • Nursing interventions for paracentesis include obtaining consent, having patients void prior to procedure, and monitoring for potential complications.

Esophageal/Gastric Varices Management

  • Focus on prevention with medications like beta-blockers, careful monitoring during active bleeding, and potential interventions like endoscopy.
  • Balloon Tamponade and Shunt Procedures: Use effective measures such as TIPS for shunting to alleviate portal hypertension.

Hepatic Encephalopathy Management

  • Regular neuro assessments, monitoring ammonia levels, avoiding constipation, and using lactulose treatment.

Cirrhosis Nursing Care

  • Nursing actions include daily weights, abdominal girth assessments, and lab monitoring, along with education on maintaining a healthy diet and rest.

Acute Liver Failure

  • Definition: Rapid onset of liver failure with no previous liver history, often caused by excessive Tylenol use.
  • Key symptoms include cognitive changes and rapid progression to hepatic encephalopathy.

Liver Cancer

  • Most commonly linked to Hepatitis C and cirrhosis.
  • Diagnosis via imaging (US, CT, MRI) without biopsy due to underlying conditions.

Liver Transplant

  • Options include living or deceased donor.
  • Importance of immunosuppressive therapy post-transplant and maintaining sobriety.

Anatomy and Function of the Pancreas

  • Endocrine functions: Insulin production, regulation of glucose levels.
  • Duct cells secrete NaHCO3 solution and acinar cells release digestive enzymes.

Acute Pancreatitis

  • Definition: Inflammation of the pancreas that leads to autodigestion due to activated digestive enzymes.
  • Common Causes: Alcohol consumption, gallstones (4 Fs: Fat, Female, Forty, Fertile), high triglycerides.

Acute Pancreatitis Clinical Manifestations

  • Severe abdominal pain especially in the LUQ, decreased bowel sounds, elevated serum enzymes (trypsin, amylase, lipase), and signs like Grey Turner and Cullen's.

Acute Pancreatitis Complications

  • Possible respiratory complications, risk of blood clots, shock, and pseudocysts.

Management of Acute Pancreatitis

  • Initial treatment includes NPO status, IV fluids, pain control, potential NG tube placement, and electrolyte monitoring.

Chronic Pancreatitis

  • Long-term inflammation leading to malnutrition, risk of hyperglycemia, and distinctive clinical manifestations like constant dull pain, jaundice, and steatorrhea.

Chronic Pancreatitis Plan of Care

  • Focus on dietary adjustments (low-fat, no caffeine, no alcohol), pancreatic enzyme replacement, diabetes control, and possibly surgical intersections based on patient needs.

Pancreatic Cancer

  • Often adenocarcinoma, frequently metastatic with high mortality rates linked to lifestyle factors such as smoking and chronic pancreatitis.

Pancreatic Cancer Clinical Features

  • Symptoms include pain, jaundice, and significant weight loss, with diagnosis relying on imaging studies and possibly fine needle aspiration for pathology.

Pancreatic Cancer Plan of Care

  • Potential treatments include surgical interventions like Whipple procedure, alongside needed nursing care.

Conclusion

  • The health of the liver and pancreas is integral to overall wellbeing. Understanding their functions, possible diseases, and management strategies is crucial for healthcare providers and patients alike.