NCT03797859

THRIVE Apneic Ventilation With Standardized Airway Management During General Anesthesia.

Apneic Oxygenation With Transnasal Humidified Rapid Insufflation Ventilatory Exchange (THRIVE) With Standardized Airway Management During General Anesthesia - an Observational Study of Blood Gas Dynamics of PaCO2, pH and PaO2.

• Status: Unknown
• Phase: —
• Study type: Observational
• Enrollment: 36 (estimated)
• Sponsor: Rigshospitalet, Denmark · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Accepted

Summary

Transnasal Humidified Rapid-Insufflation Ventilatory Exchange (THRIVE) denotes the use of high-flow humidified nasal oxygen system (for example Optiflow®) as an alternative ventilation modality for an anesthetized patient without spontaneous respiration. This method requires only basic airway management manoeuvres to keep the airway open and provides both stable longterm oxygenation as well as apneic ventialtion. We plan to evaluate this methods physiological performance under standardized conditions of airway management by frequent, repeated arterial blood gas analyses.

Detailed description

THRIVE is previously shown feasible as sole mode of ventilation in selected patients during general anaesthesia for minor laryngeal surgery for a limited time up to 30 minutes, where direct laryngoscopy was required and applied throughout the procedure. A stable oxygenation and a degree of ventilation was observed. However, a slowly developed respiratory acidosis was also observed over time. Existing physiologic studies on high flow humidified nasal oxygen suggest that closed mouth breathing enhance the effects of the high flows of oxygen levels applied by increasing the airway pressures and thereby enhance gas exchange in the lungs. Currently, it is unclear whether the efficiency of THRIVE depends on the particular circumstances of airway management. Physiologic characterization of THRIVE performance under standardized conditions of airway management and under close monitoring by systematic analysis of blood gas dynamics over time during general anesthesia is needed. We plan to study the blood gas dynamics during THRIVE apnea ventilation during general anesthesia, where the airway is managed only by jaw-thrust for up to 60 minutes. The patients will be closely monitored by repetitive arterial blood gasses to evaluate blood gas dynamics and development of respiratory acidosis. Desaturation or respiratory acidosis with pH under 7.15 and/or PaCO2-rise \> 12 kPa will lead to cessation of THRIVE.

Conditions

• Apnea
• Ventilation Therapy; Complications
• Respiratory Acidosis

Interventions

Type	Name	Description
PROCEDURE	Apneic ventilation	Ventilation by THRIVE

Timeline

• Start date: 2019-01-08
• Primary completion: 2019-05-01
• Completion: 2019-06-01
• First posted: 2019-01-09
• Last updated: 2019-01-23

Locations

2 sites across 1 country: Denmark