A client presents to the emergency department with dark, tarry stools.
The nurse would document this finding as:
Melena.
Hematemesis.
Thrombocytopenia.
Hematochezia.
The Correct Answer is A
Choice A rationale
This term specifically describes dark, tarry, and foul-smelling stools that contain digested blood. For blood to appear this way, it typically must originate from the upper gastrointestinal tract and stay in the gut for at least eight hours to allow for the breakdown of hemoglobin by digestive enzymes and intestinal bacteria. It is a hallmark sign of bleeding from the esophagus, stomach, or duodenum, indicating that the blood has undergone significant chemical alteration.
Choice B rationale
This term refers to the act of vomiting blood and does not describe the appearance of stool. While a patient with this condition may eventually develop dark stools because they are swallowing some of the blood, the term itself is strictly reserved for the emesis. Documentation of stool findings requires terms that describe the fecal matter itself, rather than the contents of the patient's vomit or the act of vomiting from the upper tract.
Choice C rationale
This is a hematological condition characterized by a low platelet count, which is generally defined as fewer than 150,000 platelets per microliter of blood. While this condition increases the risk of bleeding in the gastrointestinal tract, it is a laboratory diagnosis and a systemic state rather than a description of stool appearance. A nurse would document the stool finding itself using descriptive clinical terminology rather than naming a suspected underlying hematological or platelet disorder.
Choice D rationale
This term describes the passage of fresh, bright red blood per rectum, usually indicating a bleed that is located in the lower gastrointestinal tract, such as the colon or rectum. Because the blood has not been exposed to stomach acid or had time to be broken down by bacteria in the upper gut, it retains its red color. This is the opposite of the dark, tarry appearance described in the prompt, which requires digestion.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale
Pericarditis is the inflammation of the pericardium, which is the thin, double-walled sac that surrounds and protects the outer surface of the heart. While it causes chest pain and can lead to pericardial effusion, it does not involve the innermost lining or the heart valves. The pericardium provides lubrication and prevents over-expansion of the heart. Inflammation here is external to the myocardium and endocardium, and thus does not fit the definition of an internal lining infection.
Choice B rationale
Myocarditis is the inflammation of the myocardium, which is the middle muscular layer of the heart wall responsible for the pumping action. This condition can weaken the heart muscle, leading to heart failure or arrhythmias. While it is a serious inflammatory process of the heart, it specifically targets the muscle tissue rather than the endocardial surface or the valvular structures. It is often caused by viral infections and affects the heart's overall contractility and structural integrity.
Choice C rationale
Thrombophlebitis is an inflammatory process that causes a blood clot to form and block one or more veins, usually in the legs. It is a vascular condition rather than a cardiac one. It involves the venous walls and the formation of a thrombus, which can lead to complications like pulmonary embolism if the clot dislodges. This condition has no direct anatomical relation to the internal chambers, valves, or the endocardial lining of the heart itself.
Choice D rationale
Endocarditis is the inflammation or infection of the endocardium, which is the innermost layer of the heart's chambers and also covers the heart valves. It most commonly occurs when bacteria or other germs from another part of the body spread through the bloodstream and attach to damaged areas in the heart. This can lead to the formation of vegetations on the valves, potentially causing valvular insufficiency, heart failure, or systemic emboli if the vegetations break loose.
Correct Answer is D
Explanation
Choice A rationale
Diverticulosis is a condition where small, bulging pouches develop in the digestive tract, most commonly in the colon. The primary risk factors for diverticulosis include a low fiber diet, obesity, and aging, which lead to increased intraluminal pressure. There is no established scientific link between Helicobacter pylori infection and the formation of diverticula in the large intestine.
H. pylori specifically colonizes the acidic environment of the stomach and the proximal duodenum.
Choice B rationale
Appendicitis is the inflammation of the appendix, often caused by a blockage in the lining of the appendix that results in infection. While various bacteria can be involved in the infection once the appendix is obstructed, H. pylori is not a recognized causative agent for this condition. Appendicitis is typically an acute surgical emergency triggered by fecaliths or lymphoid hyperplasia, whereas H. pylori is associated with chronic inflammatory changes in the gastric mucosa.
Choice C rationale
Cirrhosis is the late stage of scarring of the liver caused by many forms of liver diseases and conditions, such as hepatitis and chronic alcoholism. The pathophysiology of cirrhosis involves the replacement of healthy liver tissue with scar tissue, eventually preventing the liver from functioning properly.
H. pylori is a bacterium that affects the gastrointestinal mucosa of the stomach and duodenum. It does not play a direct role in the development of hepatic fibrosis or cirrhosis.
Choice D rationale
Helicobacter pylori is a gram negative bacterium that survives in the stomach by producing urease, which neutralizes gastric acid. This infection causes chronic inflammation of the gastric lining, which weakens the protective mucous layer. This allows stomach acid to reach the sensitive tissue underneath, leading to the formation of peptic ulcers in the stomach or duodenum. Most cases of peptic ulcer disease are caused by either H. pylori infection or the long term use of NSAIDs.
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