Answer to Question 1
D
If, after repeated attempts, it is not possible to aspirate fluid from a tube that was originally established by x-ray examination to be in desired position, and (a) there are no risk factors for tube dislocation, (b) there is no change in the external marked tube length, and (c) patient is not experiencing difficulty, assume the tube is correctly placed. Another x-ray is not needed. Flushing the tube with 30 ml, not 60, of air is to help obtain the aspirate, not to check placement. Checking for placement with air is an outdated process. Increasing the water will not check placement.
Answer to Question 2
C
Determine the length of the tube you will insert, and mark location on the tube or mark with tape. Measure the distance from the tip of nose to earlobe to xiphoid process of the sternum. Adding an additional length of half the distance from the xiphoid process to the umbilicus may aid in seating the tube further into the stomach. Add an additional 20 to 30 cm (8 to 12 inches) for a nasointestinal tube. Chin to the earlobe to the xiphoid process and the tip of the earlobe to the nose to the umbilicus will provide an inaccurate length.