The nurse giving a patient a back massage is performing an intervention considered to be:

To calculate the number of 40mg capsules needed for a 2-grain dose, you need to convert grains to milligrams since the supply is given in milligrams (mg).

1 grain is approximately equal to 64.8 milligrams.

Now, let's calculate:

2 grains * 64.8 mg/grain = 129.6 mg

So, the nurse would give 129.6 milligrams of the medication. Since the supply is in 40mg capsules, you'll need to divide the total dose by the amount in each capsule to determine the number of capsules needed:

129.6 mg / 40 mg/capsule ≈ 3.24

Since you can't give a fraction of a capsule, the nurse would give 4 capsules to achieve a dose of approximately 129.6 milligrams.

A. Administering pain medication: Administering medication typically requires a healthcare provider's order. Nurses can administer medications, but this action is not independent; it relies on a prescription.

B. Teaching a patient how to change their dressing before they are discharged: This is an independent nursing action. Nurses are educated and trained to provide patient education. Teaching patients about wound care and dressing changes falls under their scope of practice and doesn't require a physician's order.

C. Changing a patient's diet from pureed to regular: Changing a patient's diet usually involves dietary guidelines set by a healthcare provider. Nurses can implement these dietary changes based on the provider's orders but cannot independently change a patient's diet without an order from a healthcare provider.

D. Giving a back rub: Providing comfort measures like a back rub is an independent nursing action. It falls under the domain of holistic nursing care and doesn't require a specific physician's order. Nurses often use such measures to promote relaxation and alleviate discomfort.

E. Repositioning a patient in bed: This is an independent nursing action. Regular repositioning is crucial for preventing pressure ulcers and maintaining a patient's comfort. Nurses assess the patient's mobility and reposition them as needed without requiring specific orders each time.