Diaphragm pacing using the minimally invasive cervical approach.

Area of Science:

• Medical Devices
• Surgical Techniques
• Respiratory Medicine

Background:

• Phrenic nerve/diaphragm pacemakers have aided thousands globally, offering an alternative to mechanical ventilation for over 40 years.
• The cervical implantation approach for diaphragm pacers is less common but presents potential benefits.

Purpose of the Study:

• To describe the cervical approach for diaphragm pacer implantation.
• To compare the pros and cons of the cervical technique versus intrathoracic and sub-diaphragmatic approaches.
• To present long-term data on diaphragm pacer utilization and survival.

Main Methods:

• Retrospective review of 1,522 patients who received the Avery diaphragm pacer.
• Analysis of implantation approaches (cervical, thoracic, sub-diaphragmatic) and device longevity.
• Comparison of electrode replacement rates and device survival between implantation methods.

Main Results:

• Cervical electrodes had a 17% replacement rate, similar to thoracic electrodes (18%).
• No significant difference in device longevity was found between cervical and thoracic approaches (mean 6.4 years).
• Most implanted electrodes never required replacement; patient demographics and usage patterns varied by approach.

Conclusions:

• The cervical approach is the least invasive method for diaphragm pacer implantation, utilizing local anesthesia and small incisions without entering body cavities.
• This technique is underutilized despite its safety and efficacy.
• Cervical implantation offers a viable, minimally invasive option for phrenic nerve stimulation.