Which intervention is most important for the practical nurse (PN) to implement for a client who is receiving total parenteral nutrition (TPN)?

Collecting fingerstick glucose levels is the most important intervention for the PN to implement for a client who is receiving TPN. TPN is a method of feeding that bypasses the gastrointestinal tract and provides all the nutritional needs of the body through a vein. TPN contains a high concentration of glucose, which can cause hyperglycemia or fluctuations in blood sugar levels. Therefore, it is essential to monitor the client's glucose levels frequently and adjust the infusion rate or insulin administration accordingly.