Final answer:
The item that would indicate a need for further teaching is pH strips.
Step-by-step explanation:
Of the options listed, the item that would indicate a need for further teaching regarding the procedure of inserting a nasogastric tube is a) pH strips. pH strips are not typically used in the insertion of a nasogastric tube, so if the nurse orientee obtains pH strips, it suggests a lack of understanding about the correct equipment to use. The other options, including lubricant, measuring tape, and sterile gloves, are all commonly used in the procedure and indicate proper preparation and knowledge.