Perforation of the gastric wall as a result of severe peptic ulcer disease (PUD) may result in which complication?
Hemorrhage.
Cholelithiasis.
Pancreatitis.
Gastritis.
The Correct Answer is A
Choice A rationale
Perforation occurs when a peptic ulcer erodes through the entire thickness of the gastric or duodenal wall. This catastrophic event allows gastric contents, including hydrochloric acid and digestive enzymes, to leak into the peritoneal cavity. Because the gastric wall is highly vascularized, the erosion of underlying blood vessels often leads to significant hemorrhage. This combination of chemical peritonitis and blood loss makes it a life-threatening emergency requiring immediate surgical and medical intervention.
Choice B rationale
Cholelithiasis refers to the formation of gallstones within the gallbladder or biliary ducts, usually due to imbalances in bile components like cholesterol or bilirubin. While biliary disease and peptic ulcers can both cause epigastric pain, they have different pathophysiological origins. The perforation of a gastric ulcer does not lead to the formation of gallstones, as the mechanisms of stone crystallization are unrelated to the structural integrity of the stomach wall or peritoneal leakage.
Choice C rationale
Pancreatitis is the inflammation of the pancreas, often caused by gallstones or excessive alcohol consumption. While a posterior duodenal ulcer can sometimes erode into the pancreas, causing localized inflammation, it is not the standard complication of a general gastric wall perforation. Perforation usually leads to generalized peritonitis rather than primary pancreatic inflammation. The systemic inflammatory response might affect multiple organs, but hemorrhage remains the more direct and immediate risk following an acute perforation event.
Choice D rationale
Gastritis is the inflammation of the stomach lining and is often a precursor to, or a milder form of, the irritation that leads to peptic ulcers. Once an ulcer has progressed to the point of perforation, the patient has moved far beyond simple gastritis. While the surrounding tissue may be inflamed, gastritis is a localized mucosal condition and not a complication resulting from a full-thickness hole that spills contents into the sterile abdominal cavity.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale
Purkinje fibers are the terminal branches of the cardiac conduction system located within the ventricular walls. They rapidly conduct electrical impulses to the myocardial cells to trigger ventricular contraction. While they possess inherent automaticity and can act as a tertiary pacemaker if other nodes fail, their intrinsic rate is very slow, typically 20 to 40 beats per minute. They are not the primary pacemaker under normal physiological conditions but rather the final stage of impulse distribution.
Choice B rationale
The Bundle of His, or the atrioventricular bundle, receives electrical impulses from the AV node and transmits them toward the apex of the heart via the bundle branches. It serves as a critical bridge for electrical conduction between the atria and the ventricles. Although it has a secondary pacemaker ability with an inherent rate of 40 to 60 beats per minute, it only takes over if the SA node fails to function correctly or if conduction is blocked.
Choice C rationale
The sinoatrial node, located in the right atrium, is known as the natural pacemaker of the heart. It initiates the electrical impulses that set the rhythm and rate of the cardiac cycle. In a healthy adult, the SA node fires at an intrinsic rate of 60 to 100 times per minute. This impulse spreads through the atria, causing them to contract, and then travels to the rest of the conduction system to coordinate a synchronized heartbeat.
Choice D rationale
The atrioventricular node is situated at the junction between the atria and ventricles. Its primary role is to delay the electrical impulse briefly, allowing the atria to finish contracting and the ventricles to fill with blood before they contract. The AV node can act as a secondary pacemaker with a rate of 40 to 60 beats per minute if the SA node is nonfunctional. However, it is not the primary site where the heart's normal rhythm is generated.
Correct Answer is D
Explanation
Choice A rationale
Intra-abdominal pressure can contribute to the severity of reflux, particularly in obese patients or those wearing tight clothing, but it is not the primary physiological defect defining gastroesophageal reflux disease. Pressure increases during certain activities like lifting or coughing, pushing gastric contents upward. However, a competent sphincter should normally resist this force. Therefore, while relevant to exacerbation, it is secondary to the underlying structural failure of the valve.
Choice B rationale
Hyposecretion of gastric acid, or achlorhydria, is actually the opposite of what typically occurs in symptomatic reflux disease. Most symptoms are driven by the corrosive nature of hydrochloric acid on the esophageal mucosa. If acid levels were low, the pH of the refluxate would be less damaging, potentially leading to fewer symptoms rather than worsening ones. This factor does not explain the mechanical failure that allows gastric contents to enter the esophagus.
Choice C rationale
Delayed gastric emptying, also known as gastroparesis, increases the volume of food and acid present in the stomach for longer periods. This stasis increases the likelihood of reflux episodes because there is more material available to be regurgitated. While it is a significant contributing factor for many patients, it is considered an aggravating condition rather than the most direct physiological cause of the reflux itself compared to a weakened muscular barrier.
Choice D rationale
The lower esophageal sphincter serves as the primary barrier preventing the backflow of stomach contents into the esophagus. In patients with this condition, the sphincter becomes incompetent or relaxes inappropriately, often termed transient relaxations. When a person lies down, the protective effect of gravity is lost, allowing acidic gastric juice to easily bypass the weak sphincter. This mechanical failure is the hallmark physiological defect that leads to the mucosal damage and pain.
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