Respiratory Complications Due to Anesthesia
Conditions
Brief summary
The purpose of this study is to determine whether an experienced anesthesia provider can adequately and/or easily mask ventilate an anesthetized patient with a commercial non-invasive ventilator device.
Detailed description
The purpose of this study is to determine whether an experienced anesthesia provider can adequately and/or easily mask ventilate an anesthetized patient with a commercial non-invasive ventilator device. The ventilator subject of this study is commonly used in the ICU and investigators aim to evaluate its usefulness in the OR. Investigators believe that the ventilator will ventilate with consistent breath rates, adequate tidal volumes and minimal airway pressures. The providers subjective scoring of ease or difficulty of ventilation with each device will also be recorded.
Interventions
DEVICENoninvasive Ventilator, V60 (Philips)
The noninvasive ventilator will be set to deliver 10 breaths per minute with a pressure setting of 8 cm H2O during exhalation and 20 cm H2O during inspiration. The inspired oxygen fraction given by the ventilator will be set at the maximum level (100% oxygen).
DEVICEManual Bag
Oxygen will flow through the standard breathing circuit with the fresh gas flow rate set at 10 L/min and the patient will be ventilated. The anesthesia provider will manually bag mask ventilate the patient until the anesthesiologist feels comfortable that the patient can be ventilated appropriately.
Sponsors
National Aeronautics and Space Administration (NASA)
University of Utah
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
SUPPORTIVE_CARE
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to 74 Years
Healthy volunteers
No
Inclusion criteria
* adults between 18-74 years of age, * ASA status I-III, * presenting for elective surgery requiring general anesthesia at the University of Utah * able and will to provide informed consent
Exclusion criteria
* oropharyngeal or facial pathology, * risk of aspiration (defined by need for rapid sequence intubation, uncontrolled gastroesophageal reflux disease), * known and/or documented difficulty placing an endotracheal tube in the past, * limited neck extension or flexion, * restrictive lung disease, * personal or familial history of malignant hyperthermia * known or predicted severe respiratory disease or compromise. * Female subjects must have a negative urine pregnancy screen.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Average of the difference in Respiratory Rate between Manual and Mechanical Ventilation (1/min) | Assessment will be made during the procedure during 10 consecutive breaths (depending on the breath rate, for approximately 1 minute) after induction but before intubation. | Difference in average respiratory rate between manual ventilation and mechanical noninvasive ventilation averaged per patient, then averaged across all studied patients. Unit: 1/min. |
| Average of the difference in ideal body weight indexed tidal volume between Manual and Mechanical Ventilation (mL/kg) | Assessment will be made during the procedure during 10 consecutive breaths (depending on the breath rate, for approximately 1 minute) after induction but before intubation | Difference in average tidal volume per ideal body weight between manual ventilation and mechanical noninvasive ventilation, averaged per patient, then averaged across all studied patients. Unit: mL/kg |
| In-Patient Average Difference of Standard Deviation in Respiratory Rate between Manual and Mechanical Ventilation (1/min) | Assessment will be made during the procedure during 10 consecutive breaths (depending on the breath rate, for approximately 1 minute) after induction but before intubation | Difference in standard deviation of respiratory rate between manual ventilation and mechanical noninvasive ventilation averaged per patient, then averaged across all studied patients. Unit: 1/min. |
| In-Patient Average Difference of Standard Deviation in ideal body weight indexed tidal volume between Manual and Mechanical Ventilation (mL/kg) | Assessment will be made during the procedure during 10 consecutive breaths (depending on the breath rate, for approximately 1 minute) after induction but before intubation | Difference in standard deviation of tidal volume per ideal body weight between manual ventilation and mechanical noninvasive ventilation, averaged per patient, then averaged across all studied patients. Unit: mL/kg |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Difficulty or ease of ventilation as perceived by anesthesia provider | Assessment will be made within one hour after the surgery has been completed. | NASA TLX Score after each patient |
Outcome results
None listed