Flow rates from an intermittent positive pressure breathing-anesthetic delivery apparatus for horses.

The research article is about a comparison study of inspiratory flow rates in an equine intermittent positive pressure breathing-anesthesia delivery apparatus, using three different types of ventilators with varying driving pressures.

Objective of the Research

The purpose of this study was to measure and compare inspiratory flow rates generated by different types of ventilators in an equine intermittent positive pressure breathing-anesthesia delivery system. The study compared three different ventilators:

• A positive phase ventilator
• A positive-negative phase ventilator
• A modified positive phase ventilator with automatic flow acceleration

These were tested at driving pressures of 2,600, 4,400, and 5,200 mm of Hg (which correspond to 50, 85, and 100 psi respectively).

Findings of the Research

After conducting the experiment, the researchers found that:

• The modified positive phase ventilator with automatic flow acceleration consistently produced the highest flow rates, given the same ventilator setting and driving pressure.
• Irrespective of the ventilator used, it was observed that greater driving pressures and high ventilator range settings resulted in the greatest flow rates. This suggests that the ventilator’s performance is significantly influenced by its driving pressure and setting range.

Significance of the Research

This research is important because it provides crucial information for optimizing the use of an equine intermittent positive pressure breathing-anesthesia delivery apparatus. The findings will be beneficial for veterinarians and other healthcare providers of horses, as they can use this information to select the most suitable ventilator and set the appropriate driving pressure to attain the most effective and efficient flow rates. It may also guide manufacturers in designing and innovating improved ventilators for such apparatus.