Implications of a permanent cardiac pacemaker in peripheral nerve blockade

Area of Science:

• Anesthesiology
• Biomedical Engineering
• Cardiology

Background:

• Patients with permanent cardiac pacemakers (PPMs) are susceptible to electromagnetic interference (EMI) in operating rooms.
• EMI can cause PPM malfunction, posing risks to patient safety.
• Current peripheral nerve blockade techniques, like nerve stimulation (NS), lack clear safety guidelines for patients with PPMs.

Purpose of the Study:

• To evaluate the safety and efficacy of combined ultrasound and low-current nerve stimulation for peripheral nerve blockade in patients with permanent cardiac pacemakers.
• To address the unknown hazards of conventional nerve stimulation near PPM sites.

Main Methods:

• A combined guidance approach was developed for peripheral nerve blockade.
• Ultrasound was used for precise nerve localization.
• Low-current nerve stimulation was employed for nerve identification.

Main Results:

• The study recommends a combined approach using ultrasound and low-current NS for nerve identification.
• This method aims to mitigate risks associated with EMI and NS near PPMs.

Conclusions:

• A combined ultrasound and low-current nerve stimulation technique provides a safer alternative for peripheral nerve blockade in patients with permanent pacemakers.
• This approach addresses the lack of established guidelines for using NS in the presence of PPMs.