A patient is prescribed Sandostatin for the treatment of esophageal varices. The nurse knows that the purpose of this cyclic octapeptide is to reduce portal pressure by:

a. Constricting the splanchnic arteries.
b. Using a beta-adrenergic blocking action.
c. Selective vasodilation of the portal system.
d. Reducing blood pressure in the portal.

The purpose of Sandostatin, a cyclic octapeptide prescribed for the treatment of esophageal varices, is to reduce portal pressure by A. constricting the splanchnic arteries.

Explanation:

Sandostatin, a medication containing the active ingredient octreotide, is prescribed for the treatment of esophageal varices. Octreotide is a cyclic octapeptide that works by reducing portal pressure, which is the pressure in the portal vein that carries blood from the digestive organs to the liver.

The purpose of Sandostatin in reducing portal pressure is achieved by constricting the splanchnic arteries. These arteries supply blood to the abdominal organs, including the liver. By constricting these arteries, Sandostatin reduces the amount of blood flowing into the portal system, thereby decreasing portal pressure.

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