A patient receiving intravenous chemotherapy begins to complain of intense pain and swelling at the IV site. Upon assessment, the nurse notes redness and warmth in the area. What is the most appropriate initial nursing intervention?

Choice A rationale Extravasation of vesicant chemotherapy agents triggers immediate cellular damage and localized inflammatory responses. Stopping the infusion prevents further tissue exposure to toxic compounds that cause necrosis. Notification of the provider is essential to initiate specific antidote protocols or surgical consultation. Physical assessment determines the extent of the injury, which is critical for documentation and intervention planning. This priority action minimizes long term morbidity and functional loss at the peripheral or central venous access site. Choice B rationale Antiemetics are pharmacological agents used to manage chemotherapy induced nausea and vomiting by blocking neurotransmitters like serotonin or dopamine in the chemoreceptor trigger zone. While supportive care is important during oncological treatment, administering these medications does not address the acute mechanical or chemical injury occurring at the intravenous site. Continuing the infusion while the patient reports pain and swelling would exacerbate tissue destruction and potentially lead to compartment syndrome or permanent nerve damage. Choice C rationale Continuing a chemotherapy infusion when signs of infiltration or extravasation are present violates safety standards and increases the volume of vesicant in the interstitial space. Warm compresses are contraindicated for certain chemotherapeutic agents, such as vinca alkaloids, because heat can increase local blood flow and spread the toxic drug further into surrounding tissues. Initial management must prioritize cessation of the causative agent rather than symptom masking through thermal applications which might worsen the chemical burn. Choice D rationale Aspiration of residual drug from the cannula is a recognized component of extravasation management, but it must never be performed while the infusion is active. Attempting to aspirate without stopping the pump allows the machine to continue forcing fluid into the subcutaneous tissue under pressure. The sequence of nursing actions must always begin with stopping the flow of the hazardous substance to limit the radius of the injury before attempting to remove the fluid.