Evaluation of Intensive Care Mechanical Ventilator Response Time During Varying Levels of Inspiratory Effort

Simple item page
dc.contributor.authorDonley, Sarah
dc.contributor.departmentHealth Sciencesen_US
dc.date.accessioned2020-03-25T14:39:54Z
dc.date.available2020-03-25T14:39:54Z
dc.date.issued2019
dc.description.abstractObjective: Mechanical ventilators must be responsive to a patient's variable inspiratory demand. Responsiveness is one attribute used to compare these expensive, but necessary lifesaving devices. Under varying levels of inspiratory effort, triggering performance was compared between the Maguet Servo-i and Respironics Esprit ventilators. Methods: The Ingmar ASL 5000 Breathing Simulator was used to provide normal respiratory mechanics (compliance of 50 mL/cm H2O; resistance, 3 cm H2O/L/s; spontaneous rate of 15 breaths/min) and inspiratory muscle pressures of 10, 15, and 20 cm H2O for 5-minutes each. The simulator was connected to each ventilator with the same settings (pressure support (PS) of 10 cm H2O; positive end-expiratory pressure (PEEP) of 0; and, a trigger flow of 3 L/min). Trigger response time, time from spontaneous effort (SoE) to a minimum pressure (Pmin), and the maximum pressure drop during triggering were collected. Results: The Esprit ventilator trigger response time and time from SoE to a Pmin decreased under conditions of increased inspiratory effort. The Servo-i trigger response time and time from SoE to Pmin increased with rising inspiratory muscle pressure. Both ventilators demonstrated a greater maximum pressure drop during triggering with each increase in inspiratory muscle pressure. However, for an inspiratory muscle pressure of 15 and 20 cm H2O, the drop in pressure was much larger for the Servo-i. Conclusions: Both ventilators are suitable for clinical use, however, the Respironics Esprit ventilator demonstrated a better response to a high ventilatory demand. A potential reason for this is the greater peak inspiratory flow rate (PIFR) capability of the Esprit ventilators. The Esprit's internal flow generator is a turbine and seems to be capable of a faster initial flow than the pneumatic flow design of the Servo-i.en_US
dc.format.extent15 pagesen_US
dc.genrethesesen_US
dc.identifierdoi:10.13016/m2kcza-qgsi
dc.identifier.urihttp://hdl.handle.net/11603/17633
dc.language.isoen_USen_US
dc.relation.isAvailableAtSalisbury Universityen_US
dc.subjectRespiratory intensive careen_US
dc.subjectRespirators (Medical equipment)en_US
dc.subjectRespiratory therapyen_US
dc.subjectRespiratory therapy--Equipment and suppliesen_US
dc.titleEvaluation of Intensive Care Mechanical Ventilator Response Time During Varying Levels of Inspiratory Efforten_US
dc.typeTexten_US

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
DonleySarah_Spring2019.pdf
Size:
2.72 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 2 of 2
No Thumbnail Available
Name:
license.txt
Size:
1.77 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
No Thumbnail Available
Name:
Donley_SOAR@SU license.pdf
Size:
197.06 KB
Format:
Adobe Portable Document Format
Description:
Download

Collections

SU Honors College Theses