A nurse is preparing a client for a Contraction Stress Test (CST).

Which method can be used to induce uterine contractions during the test?

Nipple stimulation.

Intravenous oxytocin infusion.

Administering oral medications.

Applying warm compresses to the abdomen.

Answer and Explanation

The Correct Answer is B

This method can be used to induce uterine contractions during the test by stimulating the uterus with a hormone that causes contractions.

Oxytocin is also the hormone that naturally triggers labor contractions.

Choice A is wrong because nipple stimulation can also induce contractions, but it is not as reliable or controllable as oxytocin infusion.

Choice C is wrong because oral medications are not used to induce contractions during a CST.

Some medications may interfere with the test results or cause side effects.

Choice D is wrong because applying warm compresses to the abdomen does not induce contractions.

It may help with pain relief or relaxation, but it does not affect the uterus.

Normal ranges for uterine contractions during a CST are three contractions in 10 minutes, each lasting 40 to 60 seconds.

Normal ranges for fetal heart rate during a CST are 110 to 160 beats per minute, with no decelerations after contractions.

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Correct Answer is B

Explanation

The client should not eat a light meal before an abdominal ultrasound because it can interfere with the quality of the images.

The client should fast for 8 to 12 hours before the procedure.

Some additional information about the other choices are:

Choice A is correct.

The client should drink plenty of fluids before an appointment for an abdominal ultrasound because it helps to fill the bladder and push the uterus up for better visualization.

Choice C is correct.

The client should wear comfortable clothing that can be easily removed or lifted up to expose the abdomen.

Choice D is correct.

The client should arrive at the appointment with a full bladder because it acts as an acoustic window and improves the quality of the ultrasound images.

Normal ranges for fetal growth and development during pregnancy vary depending on the gestational age, but some general parameters are:

Fetal heart rate: 110 to 160 beats per minute

Biparietal diameter: 2.4 to 9.5 cm

Crown-rump length: 0.8 to 8.4 cm

Femur length: 1.0 to 7.8 cm

Abdominal circumference: 9.4 to 35.6 cm

A. “The baby’s heart beat is audible by a Doppler stethoscope at 12 weeks of pregnancy.” B. “The baby’s sex can be determined by ultrasound at 8 weeks of pregnancy.” C. “The baby’s lungs are fully mature by 24 weeks of pregnancy.” D. “The baby’s eyes open and close by 16 weeks of pregnancy.”

Correct Answer is A

Explanation

The baby’s heart beat is audible by a Doppler stethoscope at 12 weeks of pregnancy.

This is a device that uses sound waves to create an image of the baby’s heart and measure its rate and rhythm.

Some possible explanations for the other choices are:

Choice B is wrong because the baby’s sex can not be determined by ultrasound at 8 weeks of pregnancy.

The external genitalia are not fully developed until around 14 to 16 weeks of pregnancy.

Even then, the accuracy of ultrasound depends on factors such as the position of the baby, the quality of the equipment, and the skill of the sonographer.

Choice C is wrong because the baby’s lungs are not fully mature by 24 weeks of pregnancy.

The lungs are one of the last organs to develop in the fetus and they continue to grow and mature until near term.

The production of surfactant, a substance that helps the lungs expand and prevent collapse, begins around 24 weeks but is not sufficient until around 34 to 36 weeks.

Choice D is wrong because the baby’s eyes do not open and close by 16 weeks of pregnancy.

The eyelids are fused together until around 26 to 28 weeks of pregnancy, when they start to open and close periodically.

The baby can also respond to light and dark stimuli around this time.

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A nurse is preparing a client for a Contraction Stress Test (CST). Which method can be used to induce uterine contractions during the test?

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Naxlex Comprehensive Predictor Exams

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Correct Answer is B

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Correct Answer is A

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A nurse is preparing a client for a Contraction Stress Test (CST).

Which method can be used to induce uterine contractions during the test?