Related Experiment Video
Updated: Aug 17, 2026
Measurement of Oxygen Consumption Rates in Intact Caenorhabditis elegans
Published on: February 23, 2019
The Haloscale "Infanta" Wright respirometer. An in vitro and in vivo assessment
1Hospital for Sick Children, London.
Insights
The Haloscale Infanta respirometer accurately measures volumes between 15-200 ml. Performance decreased outside this range, showing potential limitations for critical respiratory monitoring.
Area of Science:
- Pediatric respiratory monitoring
- Medical device performance evaluation
Background:
- Accurate measurement of respiratory volumes is crucial for pediatric patient care.
- Existing respirometry devices may have limitations in accuracy and range.
Purpose of the Study:
- To evaluate the performance of the Haloscale Infanta respirometer.
- To determine the accuracy and limitations of the Infanta respirometer across different respiratory conditions.
Main Methods:
- In vitro testing using ISO standards for compliance and resistance.
- In vivo assessment comparing Infanta volumes to pneumotachograph data in children.
- Testing included both spontaneous breathing and intermittent positive pressure ventilation.
Main Results:
- The Infanta respirometer demonstrated an accuracy of +/- 5% for volumes between 15 and 200 ml.
- Volume registration accuracy rapidly declined for volumes below 15 ml.
- Over-registration of volumes was observed above 200 ml.
Conclusions:
- The Haloscale Infanta respirometer is accurate for tidal volumes within the 15-200 ml range.
- Clinical use should consider the device's limitations at very low (<15 ml) and high (>200 ml) volumes.
- Further validation may be needed for specific pediatric respiratory applications.
Abstract:
The performance of the Haloscale "Infanta" respirometer has been assessed in vitro using ISO test compliances and resistances, and in vivo by comparison with pneumotachograph volumes in 13 spontaneously breathing children and 13 children during intermittent positive pressure ventilation. The Infanta was shown to be capable of registering volumes between 15 and 200 ml with an accuracy of +/- 5%. The registered volume decreased rapidly below 15 ml, whilst above 200 ml over-registration developed.
Related Concept Videos
01:20Assessment of Ventilation I: Respiratory Rate
A Ventilation assessment is critical for monitoring a patient's health status. Respiration, one of the most accessible vital signs, provides insights into the function of numerous body systems and can indicate serious health issues, such as brainstem injuries from head trauma.
Critical Guidelines for Assessing Ventilation:
01:23Assessment of Respiration
Subjective Assessment: Nurses interview the patient to gather information directly during the subjective assessment. It includes questions about the individual's medical history, medications, and symptoms, focusing on past respiratory conditions like asthma or COPD,...
01:19Respiratory Assessment: Purpose and Indications
Objectives and Importance:
The primary goal of respiratory assessment is to evaluate patients at early risk of clinical deterioration. Since respiratory distress often precedes other signs of declining health, breathing patterns and sounds become a...