A client with diabetes mellitus develops an ulcer on the bottom of the foot. Which pathology is the primary contributing factor to the ability of the ulcer to heal?
Sensory neuropathy.
Hyperlipidemia.
Ketoacidosis.
Microvascular changes.
The Correct Answer is D
A) Sensory neuropathy:
Sensory neuropathy, while common in diabetes mellitus, primarily affects sensation in the extremities and can lead to reduced pain perception and protective sensation. While sensory neuropathy can contribute to the development of foot ulcers by reducing the ability to detect trauma or pressure, it is not the primary factor influencing the ability of the ulcer to heal.
B) Hyperlipidemia:
Hyperlipidemia, characterized by elevated levels of lipids (cholesterol and triglycerides) in the blood, is a common comorbidity in diabetes mellitus. It can contribute to the development of atherosclerosis and macrovascular complications such as coronary artery disease and peripheral arterial disease. While macrovascular disease can impair wound healing by reducing blood flow to the affected area, it is not the primary contributing factor to the ability of the ulcer to heal.
C) Ketoacidosis:
Ketoacidosis, a serious complication of uncontrolled diabetes mellitus, results from the accumulation of ketones in the blood, leading to metabolic acidosis. While ketoacidosis can have systemic effects and impair overall health, it is not directly related to the ability of a foot ulcer to heal.
D) Microvascular changes:
Correct. Microvascular changes, such as thickening of the capillary basement membrane and endothelial dysfunction, are hallmark features of diabetes mellitus. These changes lead to impaired microcirculation, reduced oxygen delivery, and compromised nutrient supply to tissues, including the skin and soft tissues of the foot. Poor microvascular perfusion contributes to delayed wound healing and an increased risk of infection in individuals with diabetes mellitus. Addressing microvascular changes is essential for promoting wound healing in diabetic foot ulcers, making it the primary contributing factor to the ability of the ulcer to heal.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A) The usual types of reactions are mediated by antibodies:
Correct. Types I, II, and III hypersensitivity reactions are mediated by antibodies (IgE, IgG, or IgM) that bind to antigens and trigger immune responses. In contrast, Type IV hypersensitivity reactions are T-cell mediated and do not involve antibodies.
B) B-lymphocytes produce the offending substances:
This statement is incorrect. B-lymphocytes are involved in antibody-mediated immune responses (types I, II, and III hypersensitivity reactions), not Type IV hypersensitivity reactions, which are primarily mediated by T-lymphocytes.
C) They typically occur with the first exposure to an antigen:
This statement is incorrect. Type IV hypersensitivity reactions usually require sensitization upon initial exposure to an antigen, and subsequent exposures elicit the delayed hypersensitivity response. This is similar to types I, II, and III hypersensitivity reactions, which also involve sensitization upon initial exposure.
D) Delayed reactions are characterized by cytokine release:
This statement is partially correct. Type IV hypersensitivity reactions are characterized by a delayed onset (typically 24 to 72 hours after exposure) and involve the release of cytokines from activated T-lymphocytes, leading to inflammation and tissue damage. However, other types of hypersensitivity reactions may also involve cytokine release, so this feature alone does not differentiate Type IV from other types of reactions.
Correct Answer is B
Explanation
A) Nerve degeneration due to chronic gastric reflux:
Nerve degeneration due to chronic gastric reflux may lead to conditions such as gastroesophageal reflux disease (GERD) or esophagitis, but it is not directly related to the clinical presentation of intestinal obstruction. Symptoms of GERD or esophagitis typically include heartburn, regurgitation, and dysphagia rather than severe, colicky abdominal pain, nausea, vomiting, and abdominal distention.
B) Volvulus that occurred during an appendectomy:
Correct. Volvulus refers to the twisting of a segment of the intestine around its mesentery, leading to obstruction of the bowel lumen and compromising blood flow to the affected area. In this scenario, the client's clinical presentation of severe, colicky abdominal pain, nausea, vomiting, and abdominal distention is consistent with symptoms of intestinal obstruction, which can occur secondary to volvulus. Volvulus may result from various factors, including prior abdominal surgeries, such as an appendectomy, leading to abnormal positioning or adhesions within the abdomen.
C) Esophagitis due to reflux of gastric contents:
Esophagitis due to reflux of gastric contents can cause symptoms such as heartburn, chest pain, and difficulty swallowing, but it is not typically associated with severe, colicky abdominal pain, nausea, vomiting, and abdominal distention characteristic of intestinal obstruction.
D) A history of having Helicobacter pylori infection:
Helicobacter pylori infection is associated with conditions such as peptic ulcer disease and gastritis, but it is not directly related to the clinical presentation of intestinal obstruction. Symptoms of H. pylori infection may include abdominal pain, nausea, and vomiting, but they are not typically colicky and severe as those seen in intestinal obstruction.
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