Lethargy and hypotonia in preterm infant are symptoms of cold stress.
What is cold stress?
The term cold stress refers to a sudden reduction in the temperature of the skin. When this occurs, the body is no longer able to keep itself warm and this could lead to a more serious damage in the body.
If the nurse is looking for a symptom in order to confirm that infant has cold stress then the nurse should consider lethargy and hypotonia in preterm infant.
Learn more about cold stress:https://brainly.com/question/23475875
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