Saunders Comprehensive Review for the NCLEX-RN Examination Silvestri 5th Edition Test Bank


the serum potassium level will direct you to “3.0 mEq/L.” If this question was difficult, review the normal serum potassium level.


PTS: 1 DIF: Level of Cognitive Ability: Understanding REF: Pagana, K., & Pagana, T. (2009). Mosby’s diagnostic and laboratory test reference (9th ed.). St. Louis: Mosby. OBJ: Client Needs: Physiological Integrity TOP: Content Area: Nursing Sciences MSC: Integrated Process: Nursing Process—Implementation


28. The nurse is providing directions to a client about how to test a stool for occult blood. The nurse cautions that the presence of which of the following could cause a false- negative result? 1. Iodine 2. Colchicine 3. Ascorbic acid 4. Acetylsalicylic acid


ANS: 3


Rationale: Ascorbic acid can interfere with results of occult blood testing, yielding a false-negative result. Colchicine and iodine can cause false-positive results. Acetylsalicylic acid would have no effect or could cause a positive result by inducing bleeding from the gastrointestinal (GI) tract.


Test-Taking Strategy: Specific knowledge of interfering factors with occult blood testing is needed to answer this question accurately. Noting the strategic words “false- negative” in the question will direct you to “ascorbic acid.” If this question was difficult, review the procedures for testing a stool for occult blood.


PTS: 1 DIF: Level of Cognitive Ability: Applying REF: Chernecky, C., & Berger, B. (2008). Laboratory tests & diagnostic procedures (5th ed.). St. Louis: Saunders. OBJ: Client Needs: Physiological Integrity TOP: Content Area: Nursing Sciences MSC: Integrated Process: Nursing Process—Implementation


29. The nurse receives a telephone laboratory report indicating that a diabetic client has a glycosylated hemoglobin A1c level of 7.6%. The nurse plans to provide diabetic teaching in which of the following priority areas? 1. Avoidance of infection 2. Rotation of insulin injection sites 3. Measures to prevent hyperglycemia 4. Avoidance of hypoglycemic episodes


ANS: 3 Saunders Comprehensive Review for the NCLEX-RN Examination Silvestri 5th Edition Test Bank


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