CPR APPLICATIONS FOUNDATION · CHAPTER 13 · TREATMENT
Treatment Foundations of the Gastrointestinal System
Organize the chapter before drilling into individual CPR concepts.
Supplemental foundation map: this page orients the detailed CPR Applications for Chapter 13. It is not part of the canonical CPR object inventory.
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Normal Foundations
Abnormal Foundations
Treatment Foundations · You are here
13.30 · SOURCE CPR FOUNDATION
Concept
GI treatment questions usually test mechanism control rather than disease naming. The target may be acid exposure, inflammation, bile flow, portal pressure, toxin handling, malabsorption, alcohol use, or source control. When GI disease presents systemically, the visible symptom may not be the treatment target.
Pattern
Step 1 often links GI pathology to neurologic, hematologic, endocrine-like, or systemic effects. Encephalopathy in cirrhosis is treated by reducing gut-derived toxins. Malabsorption is treated by replacing the missing nutrient and correcting the source. Biliary infection may require drainage, not antibiotics alone.
Rule
- Treat the dominant mechanism. Acid injury, immune inflammation, toxin buildup, obstruction, infection, or deficiency each needs different therapy.
- Do not treat only the downstream symptom. Neurologic findings from liver disease require gut-liver treatment logic.
- Source control matters when flow or collections are involved. Drainage or decompression can be the key intervention.
Applications
- Hepatic encephalopathy in cirrhosis → identify precipitants and reduce gut-derived ammonia burden when indicated, often using lactulose
- Malabsorption anemia → replace nutrient and treat source
- Cholangitis → antibiotics plus biliary drainage logic
- GERD PUD → acid suppression and cause-directed therapy
- Young liver disease neuropsychiatric findings → Wilson disease logic
- A1AT disease → liver plus lung mechanism
- Tip: Treat the source organ not just the downstream organ
CPR APPLICATIONS · ACTIVE REASONING
Treat the causal GI mechanism
Make a prediction first. Each worked answer is available without JavaScript. These exercises do not save or send responses.
Worked reasoning and transfer
Best answer: Reduce gut-derived ammonia burden. Lactulose alters colonic nitrogen handling and promotes ammonia elimination.
Transfer: Why also search for infection or bleeding triggers?
Worked reasoning and transfer
Best answer: Timely biliary drainage. Obstructed infected bile requires decompression in appropriate clinical settings.
Transfer: What changes with hemodynamic instability?
Worked reasoning and transfer
Best answer: Eradication of H. pylori with an appropriate regimen. Acid suppression alone may not eliminate the etiologic infection.
Transfer: What if antimicrobial resistance is suspected?
Explain it back: Write a causal chain for one decision, then identify which piece of evidence would change the answer.
Unscored teaching examples; not validated assessment items or patient-specific advice.
How to use this foundation map
- Identify the organizing mechanism.
- Recognize the pattern.
- Restate the rule without looking.
- Test transfer with applications and question practice.
Pair CPR with the 5P Approach™ when solving cases and questions.