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Removing Fluid Above Breathing Tubes in the Operating Room

2014-08-27 03:14:12 | BioPortfolio

Summary

In this study, subjects meeting criteria will be enrolled and randomized to one of two different suctioning schemes, either continuous or intermittent. Accumulated secretions will be collected above the cuff on the breathing tube by one of the two methods depending on which group the subject is randomized into. Secretions will continue to be collected at predetermined periods of time for the duration of surgery in order to characterize the pH and volume as well as the micro-organism content.

Description

The development of pneumonia and other infections from intubation in the intraoperative setting has not been well-studied. An understanding of the content of the fluid that accumulates above the cuff in this setting will further strengthen the relationship between intubation and infection. The purpose of this study is to characterize the content of fluid extracted from the endotracheal tube cuff during surgery. This study will also evaluate the content of the fluid across various intervals of suctioning.

Suctioning Schemes -

- Continuous Suctioning Anesthesia staff will suction secretions continuously at 20 mmHg with a safety stop of 5 seconds every 30 minutes. Staff will be responsible for monitoring the interval between each safety stop.

- Intermittent Suctioning Anesthesia staff will suction secretions intermittently using an intermittent suction regulator. The regulator will be set to suction at 100-150 mmHg. The regulator has a preset cycle of intermittent suctioning for 15 seconds with an 8 second pause.

This is a prospective randomized clinical study of 48 subjects at a single site in the United States. Those placing the tube and performing the suctioning schemes will be experienced study staff and have met all training requirements to ensure consistency. Subjects will be patients undergoing surgery requiring intubation using the TaperGuard Evac Endotracheal Tube for a minimum of two hours, but no longer than twelve hours. They must also be 18 years of age or older, able to provide consent and have no presence of tracheostomy. Pregnant subjects will also be excluded.

Suctioning will begin as soon as the tube is in place and will continue until extubation or until the patient is moved from the operating room, whichever comes earlier. Secretions will be collected in a Lukens Trap. Anesthesia staff will collect the accumulated secretions every 30 minutes for the duration of the surgery, and secretions will be processed according to the instructions provided in the sample collection kit.

To address the first objective of the study, the first and last sample obtained from each subject will be analyzed individually for pH, volume, and microorganisms; all other samples will be evaluated for volume. The amount of colony forming units (CFUs) will be determined semi-quantitatively across all organisms, and presented separately for individual genera and species. The samples will be characterized with descriptive statistics including frequencies, percentages, means, medians, standard deviations, and 95% CIs. To address the second objective of the study, comparisons of pH, volume, microorganisms, and CFUs by suctioning scheme and patient-level characteristics will be conducted using chi-squared tests of independence and analysis of variance (ANOVA). Graphical methods will be developed to aid interpretation, both as a function of time and cumulatively over time.

Study Design

Observational Model: Case-Only, Time Perspective: Prospective

Conditions

Pneumonia, Ventilator-Associated

Location

Tulane University Hospital
New Orleans
Louisiana
United States
70112

Status

Not yet recruiting

Source

Covidien

Results (where available)

View Results

Links

Published on BioPortfolio: 2014-08-27T03:14:12-0400

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Pneumonia caused by infection with bacteria of the family RICKETTSIACEAE.

A species of the genus PNEUMOVIRUS causing pneumonia in mice.

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