Pulsed nasal and transtracheal oxygen delivery

Area of Science:

• Biomedical Engineering
• Respiratory Medicine
• Medical Device Technology

Background:

• Oxygen conserving devices (OCDs) like transtracheal oxygen (TTO) catheters enhance oxygen delivery efficacy, patient comfort, and compliance.
• Electronic pulsed OCDs, including demand-oxygen delivery systems (DODS), aim to further optimize oxygen administration.
• The potential for pulsed transtracheal oxygen delivery to increase efficiency was hypothesized.

Purpose of the Study:

• To investigate the efficiency of pulsed oxygen delivery via modified DODS in conjunction with TTO.
• To evaluate the impact of settable delays and pre-inspiratory triggering in DODS on oxygen delivery.
• To compare the efficacy of pulsed TTO with continuous flow TTO.

Main Methods:

• Modified DODS with adjustable delays and rapid pre-inspiratory triggers were utilized.
• The study comprised two parts: nasal oxygen delivery (7 subjects) and TTO delivery (17 subjects).
• Oxygen delivery efficiency was assessed across different delay settings and compared between pulsed and continuous flow TTO.

Main Results:

• Nasal oxygen delivery showed improved efficiency and faster response with the modified DODS.
• For TTO, no significant changes were observed for individual delay settings.
• However, combining DODS with TTO demonstrated improved delivery efficiency compared to continuous flow TTO.

Conclusions:

• Early inspiratory oxygen delivery significantly increases the efficiency of oxygen therapy.
• While response time delays are critical for nasal oxygen, they are less impactful for TTO.
• Pulsed TTO delivery is more efficient than continuous flow TTO and warrants further long-term investigation.