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Which of the following is not true regarding current research on the appropriateuse of maternal oxygen? Select one: aMaternal oxygen therapy can be appropriately administered via nasal cannula. b. Maternal oxygen therapy is beneficial in improving fetal oxygen status duringlabor and in resolving nonCategory 1 FHR patterns including fetal tachycardia and late decelerations. Maternal-Newbom Nursing: The Critical Components Of Nursing Care, 3rd Edition, Roberta Durham, Linda Chapman c. Fetal hemoglobin has a higher affinity for oxygen than adult hemoglobin; fetal hematocrit is higher than adult hematocrit. d. Maternal oxygen therapy should be utilized for 1530 minutes based on fetalresponse. A Providing maternal oxygen has been shown to improve fetal oxygen status and resolve non- Category 1 Fetal Heart Rate (FHR) pattems. Matemal oxygen is best provided at 10L via nonrebreather facemask. Matemal oxygen can improve FHR vanability, decrease fetal tachycardia, and reduce/eliminate late decelerations. The benefits of maternal oxygenation on the fetus have been shown to continue for as much as 30 minutes after discontinuation. Evidence is inconsistent as to how long maternal oxygen therapy should last. This article recommends maternal oxygen therapy be used for 1530 minutes but there is a need for more research. Early decelerations are probably caused by: Select one: a. Decreased maternal-fetal exchange b. Umbilical cord occlusion c. Momentary increase in intracranial pressure due to head compression Compression of umbilical cord C Early decelerations are visually apparent, usually symmetrical, with a gradual decrease and return of FHR associated with a uterine contraction (UC). Early decels usually mirror the UC and are generally associated with fetal head compression resulting in a transient increase in Maternal-Newbom Nursing: The Critical Components Of Nursing Care, 3rd Edition, Roberta Durham, Linda Chapman intracranial pressure. Early decels are considered benign and require no intervention but should be documented in the nurse's charting. Tachysystole, previously referred to as hyperstimulation, is defined as:Select one or more: a. Contractions lasting 2 minutes or longer b. Five or more contractions in 10 minutes over a 30 minute window @ O 2