[Improving the systemic oxygenation by enteral oxygen therapy]

Area of Science:

• Critical Care Medicine
• Gastroenterology
• Pulmonary Medicine

Background:

• Systemic oxygenation is crucial for critically ill patients.
• Conventional therapies may have limitations in improving oxygenation.
• Exploring novel therapeutic avenues like enteral oxygen therapy is warranted.

Purpose of the Study:

• To investigate the efficacy of enteral oxygen therapy in enhancing systemic oxygenation.
• To compare oxygen insufflation into the intestines versus the stomach.
• To evaluate the duration and magnitude of oxygenation improvement.

Main Methods:

• A study involving 34 critical patients.
• Administration of oxygen via enteral routes (intestines and stomach).
• Monitoring of systemic oxygenation parameters (PaO2, PaO2/FiO2 ratio).

Main Results:

• Intestinal oxygen insufflation led to a significant, delayed, and prolonged increase in systemic oxygenation (p<0.001).
• The peak effect on oxygenation was observed 9 hours post-procedure and lasted for 32 hours.
• Oxygen administration into the stomach did not improve systemic oxygenation.

Conclusions:

• Enteral oxygen therapy, specifically intestinal insufflation, can improve systemic oxygenation.
• The mechanism likely involves gastrointestinal function normalization and subsequent metabolic changes, rather than direct intestinal absorption.
• Further research is needed to elucidate the precise mechanisms of this therapeutic effect.