Final answer:
None of the laboratory results provided would necessitate contacting a healthcare provider as they are all within normal ranges; this includes a normal white blood cell count, hemoglobin level, potassium level, and a healthy platelet count.
Step-by-step explanation:
The laboratory result for a pre-operative patient that would prompt a nurse to contact the healthcare provider is not provided among the options a) Platelet count of 180,000, b) Potassium level of 3.8 mEq/L, c) Hemoglobin level of 14 g/dL, and d) White blood cell count of 9,000/mm³. All these values are within normal ranges for an adult. Leukocytes, or white blood cells, have normal values ranging from 3.5 to 11 x 10⁹ cells/L, which translates to 3,500 to 11,000/mm³, making option d) a normal leukocyte count. The platelet count in option a) falls within the normal range of 150,000 to 450,000 platelets per microliter of blood. A hemoglobin level of 14 g/dL, as shown in option c), is considered normal for adults. Option b), a potassium level of 3.8 mEq/L, is also within the normal range of 3.5 to 5.0 mEq/L.