Methemoglobinemia After Transesophageal Echocardiogram

Area of Science:

• Anesthesiology
• Pharmacology
• Critical Care Medicine

Background:

• Local anesthetics like benzocaine are widely used for procedures.
• Benzocaine's potential for causing acquired methemoglobinemia (MetHb) is a serious adverse effect.
• Understanding MetHb is vital due to its life-threatening nature.

Observation:

• A case study involving a patient with sepsis and anemia who developed MetHb after benzocaine use.
• The patient experienced respiratory failure as a complication of MetHb.
• This highlights the critical nature of MetHb in susceptible individuals.

Findings:

• Benzocaine administration can lead to acquired methemoglobinemia (MetHb), a rare complication.
• MetHb can manifest with severe consequences, including respiratory failure.
• Co-existing conditions like sepsis and anemia may increase risk.

Implications:

• Clinicians must be aware of benzocaine-induced MetHb, especially during endoscopic procedures.
• Early detection and management of MetHb are essential for preventing severe outcomes.
• Further research into risk factors and prevention strategies for benzocaine-related MetHb is warranted.