Is it Necessary to Set External PEEP in AECOPD Patients

• ClinicalTrials.gov Identifier: NCT02114567
• Recruitment Status: Completed
• First Posted: April 15, 2014
• Last Update Posted: July 16, 2014
• Sponsor: Southeast University, China
• Information provided by (Responsible Party): Ling Liu, Southeast University, China

Study Description

Brief Summary:

Acute exacerbation of chronic obstructive pulmonary disease patients with intrinsic positive end-expiratory pressure (PEEPi), Neurally adjusted ventilatory assist (NAVA) reduce work of breathing and trigger delay at any external positive end-expiratory pressure (PEEPe) level compared with pressure-support ventilation (PSV)

Condition or disease	Intervention/treatment	Phase
Acute Exacerbation Chronic Obstructive Pulmonary Disease	Other: PEEP titration	Not Applicable

Detailed Description:

All patients randomly underwent a 30 mins PSV and NAVA crossover ventilation (15 mins each) at progressive PEEPe levels. Progressive levels of PEEPe were applied stepwise in increments of 40% of baseline static PEEPi, every 30 mins, from zero to 160% of baseline static PEEPi during the protocol (0, 40%, 80%, 120% and 160% of static PEEPi, respectively). During PSV, pressure support level was set to meet a Vt 6ml/kg, I/E cycling was 30% of the maximum inspiratory peak flow, flow trigger was 1L/min, and inspired fraction of oxygen (FiO2) was set to the similar level before the study protocol. During NAVA, NAVA Level was set at 15 cmH2O / µV and a peak airway pressure limit was set in order to apply the same inspiratory pressure support at each PEEPe level during PSV. The new setting of NAVA was defined as NAVA15. Moreover the trigger was set at 0.5 µV and the I/E cycling fixed at 70% of the peak of EAdi. During the entire protocol, FiO2 and peak air way pressure were maintained the same levels at each PEEPe level between PSV and NAVA. Arterial blood gases were measured at the end of PSV or NAVA15 ventilation at each PEEPe level.

Study Design

• Study Type: Interventional (Clinical Trial)
• Actual Enrollment: 12 participants
• Allocation: Randomized
• Intervention Model: Crossover Assignment
• Masking: None (Open Label)
• Primary Purpose: Basic Science
• Official Title: Neural Triggering and Cycling-off of Pressure Support Ventilation Improves Synchrony and Reduces Inspiratory Effort in Chronic Obstructive Pulmonary Disease.
• Study Start Date: January 2014
• Actual Primary Completion Date: June 2014
• Actual Study Completion Date: June 2014

Arms and Interventions

Arm	Intervention/treatment
Experimental: PSV ventilation; AECOPD Patients who were ventilated wiht PSV, PEEP was titrated and set at 0, 40%, 80% and 120% PEEPi. Pressure support was set to get the tidal volume of 6ml/kg.	Other: PEEP titration; In both groups, PEEP was titrated and set to 0, 40%PEEPi, 80%PEEPi, and 120%PEEPi
Experimental: NAVA ventilation; AECOPD patients who were ventilated with NAVA, PEEP was titrated and set at 0, 40%, 80% and 120% PEEPi. NAVA level was set to get the tidal volume of 6ml/kg.	Other: PEEP titration; In both groups, PEEP was titrated and set to 0, 40%PEEPi, 80%PEEPi, and 120%PEEPi

Outcome Measures

Primary Outcome Measures :

1. trigger work of breathing [ Time Frame: 1 day ]

Secondary Outcome Measures :

1. patient-ventilator synchrony [ Time Frame: 1 day ]

Eligibility Criteria

• Ages Eligible for Study: 18 Years to 85 Years (Adult, Older Adult)
• Sexes Eligible for Study: All
• Accepts Healthy Volunteers: No

Criteria

Inclusion Criteria:

1. mechanical ventilation AECOPD patients with Static PEEPi measured by End-expiratory airway occlusion method ≥ of 5 cm H2O
2. Hemodynamics stability (heart rate < 140 beats/min, no vasopressors required, or <5 μg/kg/min dopamine) without any evidence
3. no sedation or on minimal sedation with low dose of morphine (<3mg/h, by continuous intravenous infusion
4. Breathing spontaneously
5. Awake and with positive cooperate

Exclusion Criteria:

1. tracheostomy
2. treatment abandonment
3. history of esophageal varices
4. gastro-esophageal surgery in the previous 12 months or gastro-esophageal bleeding in the previous 30 days
5. coagulation disorders (INR ratio>1.5 and Activated partial thromboplastin time > 44 s)
6. history of acute central or peripheral nervous system disorder or severe neuromuscular disease

Contacts and Locations

Locations

China, Jiangsu

Nanjing Zhong-Da Hospital, Southeast University

Nanjing, Jiangsu, China, 210009

Sponsors and Collaborators

Southeast University, China

Investigators

• Study Director: ling liu, md; Department of Critical Care Medicine, Nanjing Zhongda Hospital and School of Medicine, Southeast University, China

More Information

Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):

Liu L, Xia F, Yang Y, Longhini F, Navalesi P, Beck J, Sinderby C, Qiu H. Neural versus pneumatic control of pressure support in patients with chronic obstructive pulmonary diseases at different levels of positive end expiratory pressure: a physiological study. Crit Care. 2015 Jun 9;19(1):244. doi: 10.1186/s13054-015-0971-0.

• Responsible Party: Ling Liu, Dr., Southeast University, China
• ClinicalTrials.gov Identifier: NCT02114567
• Other Study ID Numbers: COPDNAVA
• First Posted: April 15, 2014
• Last Update Posted: July 16, 2014
• Last Verified: July 2014

Keywords provided by Ling Liu, Southeast University, China:

AECOPD; work of breathing; patient-ventilator synchrony

Additional relevant MeSH terms:

Lung Diseases; Lung Diseases, Obstructive; Pulmonary Disease, Chronic Obstructive; Respiratory Tract Diseases