Certified Nurses Operating Room (CNOR) Practice Exam

Tachycardia is a significant indicator of hypersensitivity or an adverse reaction to local anesthesia. When a patient experiences an increased heart rate following the administration of local anesthetic, it could suggest systemic absorption, leading to elevated levels of the anesthetic in the bloodstream. This can occur if the local anesthetic is introduced inadvertently into a blood vessel or if it is absorbed too quickly. Such a reaction can lead to more severe complications, including symptoms of toxicity that affect the central nervous system and cardiovascular system.

In this context, tachycardia, as well as other systemic reactions, may also signify a need to modify the surgical approach, monitor vital signs closely, and be prepared to intervene if more severe symptoms develop. Recognizing tachycardia early can help the surgical team take the necessary precautions to protect the patient’s wellbeing. Other options, such as confusion, weak pulse, and weakness, may be associated with various medical conditions but do not specifically indicate hypersensitivity to local anesthesia in the same direct manner that tachycardia does.