NCLEX-PN · Physiological Adaptation · 7 min read
GI Bleeding, Bowel Obstruction, Pancreatitis and Liver Disease
- Differentiate the clinical manifestations, laboratory patterns, and focused data collection findings associated with upper and lower gastrointestinal bleeding.
- Distinguish between mechanical and non-mechanical bowel obstructions, identifying key complications such as peritonitis and applying appropriate nursing interventions within the practical nurse scope.
- Describe the pathophysiological changes, monitoring priorities, and nursing care for clients with acute pancreatitis, cholecystitis, and chronic liver disease including cirrhosis and hepatic encephalopathy.
Gastrointestinal Bleeding: Data Collection and Nursing Support
Gastrointestinal (GI) bleeding presents differently depending on the anatomic location of the blood source and the speed of blood transit. Upper gastrointestinal bleeding commonly manifests as hematemesis, which may appear as bright red blood or dark coffee-ground emesis. The coffee-ground appearance occurs when blood has been altered by gastric secretions. Blood that travels through the digestive tract from an upper source produces melena, defined as black, tarry, foul-smelling stools caused by the digestion of blood. In contrast, hematochezia refers to bright red or maroon-colored blood passed per rectum, which typically indicates lower gastrointestinal bleeding or massive, rapid upper gastrointestinal bleeding where transit is too fast for digestion to occur.
Acute gastrointestinal hemorrhage can quickly lead to hypovolemic shock. Critical clinical indicators of hypovolemic shock include tachycardia, tachypnea, and hypotension. While the registered nurse (RN) is responsible for the initial comprehensive assessment, the practical nurse performs focused data collection. The practical nurse must immediately report signs of hemodynamic instability, such as pallor, cool clammy skin, or lightheadedness, to the registered nurse.
Diagnostic screening and laboratory monitoring are essential components of care. Guaiac-based fecal occult blood testing is used to detect microscopic blood in the stool that is not visible on visual inspection. Clients should avoid red meat and certain raw vegetables, including broccoli and turnips, prior to testing because these items can cause false-positive guaiac stool test results. In contrast, iron supplements can darken the stool but do not typically cause a false-positive result. The practical nurse reports suspected gastrointestinal bleeding to the RN and follows prescribed NPO (nothing by mouth) orders when oral intake must be withheld for evaluation or treatment. Additionally, the practical nurse monitors hemoglobin and hematocrit laboratory trends and promptly alerts the registered nurse to falling values. When blood administration is required for gastrointestinal hemorrhage, the practical nurse assists in verifying client identification and blood products according to state and facility policy.
| Manifestation | Visual Appearance | Typical Origin |
|---|---|---|
| Hematemesis | Bright red blood or dark coffee-ground emesis | Upper gastrointestinal source |
| Melena | Black, tarry, foul-smelling stool | Digested blood from an upper gastrointestinal source |
| Hematochezia | Bright red or maroon-colored blood per rectum | Lower gastrointestinal source or massive upper bleeding |
Common mistakes
- Assuming iron supplements cause false-positive guaiac stool tests; iron darkens the stool naturally, whereas red meat and raw vegetables like broccoli and turnips cause false-positives.
- Withholding prescribed opioid pain medications from a client with a bowel obstruction; the practical nurse should administer the analgesia and monitor the client's clinical response rather than leaving pain unmanaged.
- Relying solely on abdominal girth measurements to track fluid retention in cirrhosis; while daily umbilical girth measurements are important, obtaining daily body weights at the same time and on the same scale is the most accurate method.
- Waiting for severe lethargy before reporting mental status changes in liver disease; early signs of hepatic encephalopathy are subtle, such as altered sleep-wake cycles, mild confusion, and handwriting changes, and require prompt reporting to the RN.
Key points
- Upper GI bleeding commonly presents as hematemesis or melena, while lower GI bleeding commonly presents as hematochezia; brisk upper GI bleeding can also cause hematochezia, and signs of hemodynamic instability require immediate reporting to the RN.
- Mechanical bowel obstruction involves a physical barrier (adhesions, tumors, hernias) presenting with early high-pitched tinkling sounds, while non-mechanical obstruction (paralytic ileus) involves absent or decreased peristalsis.
- A rigid, board-like abdomen with fever, guarding, and tachycardia indicates peritonitis, an emergency requiring immediate reporting to the RN.
- Acute pancreatitis involves enzymatic autodigestion, causing severe epigastric pain radiating to the back, elevated amylase and lipase (lipase being more specific), hypocalcemia, and potential bleeding signs (Cullen and Grey Turner signs).
- Cholecystitis causes right upper quadrant pain radiating to the shoulder, Murphy sign, and symptoms triggered by high-fat foods; the practical nurse reinforces a low-fat diet and encourages early ambulation post-laparoscopy to relieve gas pain.
- Cirrhosis leads to portal hypertension, esophageal varices, bleeding risks from impaired clotting factor synthesis, and ascites, which is monitored accurately through daily weights and abdominal girth measurements.
- Hepatic encephalopathy is caused by neurotoxin and ammonia accumulation, presenting with asterixis and confusion; it is treated with lactulose to achieve two to three soft stools daily and improved cognitive status.
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