03-16-2008, 06:10 AM
A 32-year-old woman presents to the emergency room with a laceration on the palm of her hand after accidentally cutting herself while chopping vegetables. The medical student on service is asked to clean and suture the wound. After thorough irrigation, lidocaine is injected around the wound to provide local anesthesia. Which of the following is true regarding lidocaine?
A.Lidocaine blocks potassium channels
B.Lidocaine exists in cationic form at a low pH.
C.Lidocaine binds extracellular receptors
D.Lidocaine is an ester anesthetic
E.Lidocaine is a weak acid
A.Lidocaine blocks potassium channels
B.Lidocaine exists in cationic form at a low pH.
C.Lidocaine binds extracellular receptors
D.Lidocaine is an ester anesthetic
E.Lidocaine is a weak acid