Final Answer:
Advancing the catheter above 90% ensures optimal fetal oxygen saturation, addressing the risk associated with low levels during late decelerations, thereby promoting fetal well-being. Discontinuing or repositioning the catheter may not effectively improve the critical oxygenation status.Therefore, option 3.Advance the catheter until the reading is above 90% and continue monitoring is correct.
Step-by-step explanation:
Late decelerations during labor can indicate inadequate oxygenation to the fetus. In this scenario, the fetal pulse oximeter shows a range of 75% to 85%, which is below the optimal level for fetal oxygen saturation.
To improve oxygenation and fetal well-being, the nurse should advance the catheter until the reading is above 90% and continue monitoring. It's crucial to ensure that the fetus receives sufficient oxygen to prevent complications.
Repositioning the catheter, as suggested in option 4, may not be sufficient in this case, as the reading is already suboptimal. Discontinuing the catheter, as mentioned in options 1 and 2, is not appropriate, as it doesn't address the low oxygen saturation levels.
Advancing the catheter aims to optimize the fetal oxygen saturation, aligning with the goal of improving the well-being of the fetus during late decelerations.
In summary, advancing the catheter to achieve a fetal pulse oximeter reading above 90% is the most appropriate action in this situation. It directly addresses the low oxygen saturation levels, aiming to enhance fetal oxygenation and minimize the risk of complications associated with inadequate oxygen supply during labor.
Therefore, option 3.Advance the catheter until the reading is above 90% and continue monitoring is correct.