A client undergoes the screening test for gestational diabetes.

The nurse reviews the client's blood sugar level results.

The fasting blood sugar level is 89 mg/dL, the 1-hour level is 178 mg/dL, and the 2-hour level is 150 mg/dL.

Based on these results, the nurse would interpret them as indicating:.

The correct answer is choice C. Fasting: 90 mg/dL, 1 hour: 185 mg/dL, 2 hours: 160 mg/dL.

This is because these blood sugar levels exceed the normal ranges for a pregnant woman undergoing a screening test for gestational diabetes.

The normal ranges are:

• Fasting: less than 95 mg/dL

• 1 hour: less than 180 mg/dL

• 2 hours: less than 155 mg/dL

Choice A is wrong because these blood sugar levels are within the normal ranges.

Choice B is wrong because only the fasting blood sugar level is slightly above the normal range, but not enough to confirm a diagnosis of gestational diabetes.

Choice D is wrong because only the 1 hour and 2 hours blood sugar levels are slightly above the normal ranges, but not enough to confirm a diagnosis of gestational diabetes.

The correct answer is choice B. Impaired glucose tolerance.This means that the blood sugar levels are higher than normal, but not high enough to diagnose gestational diabetes.The normal ranges for the glucose tolerance test for gestational diabetes are:

• Fasting blood sugar level: less than 95 mg/dL (5.3 mmol/L)

• 1-hour level: less than 180 mg/dL (10 mmol/L)

• 2-hour level: less than 155 mg/dL (8.6 mmol/L)

The client’s fasting blood sugar level was within the normal range, but the 1-hour and 2-hour levels were above the normal range, indicating impaired glucose tolerance.

Choice A is wrong because normal glucose tolerance means that the blood sugar levels are within the normal range for all three measurements.

Choice C is wrong because gestational diabetes means that the blood sugar levels are above the diagnostic threshold for all three measurements:

• Fasting blood sugar level: 92 mg/dL (5.1 mmol/L) or higher

• 1-hour level: 180 mg/dL (10 mmol/L) or higher

• 2-hour level: 153 mg/dL (8.5 mmol/L) or higher

Choice D is wrong because pre-existing diabetes means that the blood sugar levels are above the diagnostic threshold for diabetes before pregnancy:

• Fasting blood sugar level: 126 mg/dL (7 mmol/L) or higher

• Random blood sugar level: 200 mg/dL (11.1 mmol/L) or higher