Before starting a secondary (piggyback) IV antibiotic, the LVN should first:

Rationale:

A. Run additional cord under carpeting is incorrect because placing cords under carpets creates a fire and tripping hazard and can damage the cord insulation, increasing the risk of electrical shock.

B. Ensure the plug has three prongs is correct because a three-prong plug includes a grounding prong, which prevents electrical shock by directing stray electrical current safely to the ground. This is a key safety measure for electrical equipment in healthcare settings.

C. Unplug the cord by grasping the plug is correct because pulling on the cord itself can damage the insulation, loosen wiring, and create an electrical hazard. Always unplug by holding the plug securely.

D. Avoid rolling equipment over extension cords is correct because rolling heavy equipment over cords can crush the wiring, wear down insulation, and create sparks or shorts, posing a risk of electrical shock or fire.

E. Plug in the pump close to sink is incorrect because placing electrical equipment near water sources increases the risk of electrocution. Electrical devices should be kept away from sinks, wet floors, or any source of moisture.

Rationale:

A. Pulmonary crackles is incorrect because crackles are a respiratory finding caused by fluid in the alveoli, commonly seen in pulmonary edema or fluid overload, not infection at the IV site. While pulmonary symptoms can indicate complications in hospitalized patients, they are unrelated to early signs of a localized IV infection.

B. Fever and chills is incorrect because these are systemic signs of infection. They may develop if a local IV infection progresses to bacteremia or sepsis, but they typically appear later in the course of infection, not as an initial warning at the IV site. Relying on fever and chills would delay early detection and intervention, increasing the risk of serious complications.

C. Redness and tenderness at the site is correct because these are classic early indicators of a localized IV site infection. Additional early signs may include warmth, mild swelling, and slight pain at the insertion site. Early recognition allows for prompt intervention, such as removing the IV, applying sterile dressings, notifying the provider, and monitoring the patient, which helps prevent progression to systemic infection or sepsis. Localized IV infections are usually caused by bacteria introduced during insertion or from prolonged catheter use.

D. Hypotension is incorrect because low blood pressure is a late systemic sign, often associated with sepsis or severe bloodstream infection, rather than an early local IV site infection. Waiting for hypotension to appear would delay critical intervention and increase patient risk.