What is the primary goal of pharmacologic therapy in acute upper GI bleeding?
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Review of drugs used to control GI bleeding, including vasoconstrictors, acid suppressors, and clotting agents.
By mastering this deck, you'll understand the pharmacologic strategies to acutely manage GI bleeding, enabling effective selection and administration of drugs such as vasoconstrictors, acid suppressors, and clotting agents in clinical scenarios. This knowledge improves patient outcomes through timely, targeted therapy and enhances your ability to interpret pharmacologic interventions in GI hemorrhage management.
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| # | Front | Back | Hint |
|---|---|---|---|
| 1 | What is the primary goal of pharmacologic therapy in acute upper GI bleeding? | The primary goal is to control bleeding, reduce rebleeding risk, and stabilize the patient by promoting vasoconstriction, acid suppression, and clot formation. | Think of stopping the bleed and preventing rebleeding. |
| 2 | Name a commonly used vasoconstrictor agent in the management of GI bleeding. | Vasopressin (or terlipressin) is commonly used to constrict splanchnic vessels and reduce bleeding. | V for Vasopressin, V for Vasoconstriction. |
| 3 | How does vasopressin help control gastrointestinal bleeding? | Vasopressin constricts splanchnic arterioles, decreasing blood flow to the bleeding site and reducing hemorrhage. | — |
| 4 | What class of drugs is commonly used to reduce gastric acid secretion in GI bleeding, and why? | Proton pump inhibitors (PPIs) are used because they effectively suppress gastric acid, which stabilizes clots and promotes healing at bleeding sites. | Think of PPIs as acid 'blockers'. |
| 5 | Name a proton pump inhibitor frequently used in GI bleeding management. | Omeprazole or pantoprazole are commonly used PPIs in this setting. | — |
| 6 | What is the role of somatostatin analogs like octreotide in GI bleeding? | Octreotide reduces splanchnic blood flow, inhibits vasodilation, and decreases bleeding from varices and other sources. | Octreotide = 'Oct' for octopus, grasping blood flow. |
| 7 | Why are clotting agents such as fresh frozen plasma (FFP) used in GI bleeding? | FFP provides clotting factors to correct coagulopathy, aiding clot formation and hemostasis. | — |
| 8 | In what scenarios are vasoconstrictors like vasopressin indicated for GI bleeding? | They are indicated mainly in variceal bleeding, especially esophageal varices, to reduce portal pressure and bleeding. | — |
| 9 | What is the mechanism of action of octreotide in controlling variceal bleeding? | Octreotide inhibits vasodilatory peptides, leading to splanchnic vasoconstriction and decreased portal hypertension. | — |
| 10 | Describe the use of tranexamic acid in GI bleeding management. | Tranexamic acid is an antifibrinolytic that stabilizes formed clots by inhibiting plasminogen activation, reducing bleeding. | — |
| 11 | What are the potential risks associated with vasoconstrictor therapy in GI bleeding? | Risks include ischemia of splanchnic organs, myocardial ischemia, and hyponatremia, requiring careful monitoring. | — |
| 12 | How do proton pump inhibitors contribute to rebleeding prevention after initial control of a GI hemorrhage? | PPIs maintain a less acidic environment, stabilizing clots and promoting mucosal healing, reducing rebleeding risk. | — |
| 13 | Which pharmacologic agent is used to directly stimulate clot formation at bleeding sites? | Desmopressin (DDAVP) enhances von Willebrand factor release, promoting platelet adhesion and clot formation. | — |
| 14 | What is the significance of combining vasoconstrictors with acid suppression in GI bleeding therapy? | Combination improves hemostasis by reducing bleeding vessel pressure and stabilizing formed clots in an optimal pH environment. | — |
| 15 | Name an alternative agent used in refractory variceal bleeding when vasoconstrictors are ineffective. | Balloon tamponade (e.g., Sengstaken-Blakemore tube) is used as a temporizing measure, not pharmacologic but important in management. | — |
| 16 | What is the primary consideration before administering clotting factors in GI bleeding? | Assessing coagulation status and correcting coagulopathy to ensure effective clot formation without risking thrombosis. | — |
| 17 | Explain why acid suppression is critical in peptic ulcer bleeding. | Acid suppression promotes clot stability over the bleeding ulcer by raising pH, preventing clot lysis and promoting healing. | — |
| 18 | What is the typical dosing strategy for PPIs in acute GI bleeding? | High-dose IV PPI therapy, such as omeprazole 80 mg bolus followed by continuous infusion, is common to rapidly elevate gastric pH. | — |
| 19 | Describe the mechanism by which tranexamic acid stabilizes clots. | It inhibits plasminogen activation, reducing fibrinolysis and helping maintain formed clots at the bleeding site. | — |
| 20 | What are contraindications or cautionary considerations when using vasoconstrictors in GI bleeding? | Contraindications include ischemic heart disease, peripheral vascular disease, and hypertension due to risk of ischemia. | — |
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