Comparative Effects of Different Noninvasive Ventilation Mode on Neural Respiratory Drive in Recovering AECOPD Patients

Chronic Obstructive Pulmonary Disease Clinical Trial

Official title:

Comparative Effects of Noninvasive Proportional Assist and Pressure Support Ventilation on Neural Respiratory Drive in Recovering Acute Exacerbation of Chronic Obstructive Pulmonary Disease(AECOPD) Patients

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT01782768
• Other study ID #: zjianheng
• Status: Completed
• Phase: N/A
• First received: January 19, 2013
• Last updated: December 3, 2016
• Start date: January 2013
• Est. completion date: April 2013

Study information

• Verified date: December 2016
• Source: The First Affiliated Hospital of Guangzhou Medical University
• Contact: n/a
• Is FDA regulated: No
• Health authority: China: Ethics Committee
• Study type: Interventional

Clinical Trial Summary

Background: The efficiency of Neural respiratory drive (NRD)expressed by a ratio of ventilation to the diaphragm electromyogram (EMGdi) decreases in patients with COPD .Improving the neural respiratory drive efficiency of COPD will help to relieve the clinical symptom and make the patients feel comfort.Noninvasive positive pressure ventilation(NPPV)is a good treatment to AECOPD patients.It is unknown the effects of different mode of noninvasive positive pressure ventilation(NPPV) such as proportional assist ventilation (PAV) and pressure-support ventilation (PSV) on the efficiency of Neural drive of AECOPD and which mode benefit the patients more.

Objective: To compare the short-term effects of mask pressure support ventilation (PSV) and proportional assist ventilation (PAV) on Neural respiratory drive in recovering patients of AECOPD

Description:

Methods: After the baseline data of spontaneous breathing was collected, 20 hypercapnic recovering AECOPD patients were placed on different mode of noninvasive positive pressure ventilation(NPPV, such as the PAV or PSV mode) randomly. For each mode, three levels (PA-, PA, PA+or PS-, PS, PS+), ) of support were applied.PS and PA are set for the patient's comfort . On the basis of these two levels, 25% increase and reduction assisted level of pressure were set both for PS and PA (PA-, PA+or PS-, PS+). At each level, the patients were ventilated at least 20 minutes until the breathing was stable. The respiratory frequency (RR), tidal volume (VT), transdiaphragmatic pressure (pdi) the pressure-time product (PTP) and root-mean-square(RMS) of EMGdi were calculated. Esophageal and gastric balloon－catheters were used to detect the intra-thoracic and abdominal pressure. Airway pressure was also measured simultaneously. EMGdi was recorded from a multipair esophageal electrode .During ventilation Airflow and ventilation were measured with pneumotachograph.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 20
• Est. completion date: April 2013
• Est. primary completion date: April 2013
• Accepts healthy volunteers: No
• Gender: Male
• Age group: 50 Years to 75 Years

Eligibility

Inclusion Criteria:

• Clinical diagnosis of the COPD (Chronic Obstructive Pulmonary Disease) the COPD patients were all in stable condition during recovery from acute exacerbation.

Exclusion Criteria:

• severe Cardiovascular disease

• Pneumonia

• neuromuscular and chest wall deformity

• Respiratory arrest

• Cardiovascular instability (hypotension, arrhythmias, myocardial infarction)

• Change in mental status; uncooperative patient

• High aspiration risk

• Viscous or copious secretions

• Recent facial or gastroesophageal surgery

• Craniofacial trauma

• Fixed nasopharyngeal abnormalities

• Burns

• Extreme obesity

Study Design

Endpoint Classification: Efficacy Study, Intervention Model: Single Group Assignment, Masking: Single Blind (Subject), Primary Purpose: Treatment

Related Conditions & MeSH terms

• Chronic Obstructive Pulmonary Disease
• Lung Diseases
• Lung Diseases, Obstructive
• Pulmonary Disease, Chronic Obstructive

Intervention

Device:
• noninvasive positive pressure ventilation
the assisted level of the noninvasive proportional assist(PAV) and pressure support ventilation(PSV) on Neural respiratory drive(NRD) in recovering patients with acute exacerbation of chronic obstructive pulmonary disease

Locations

Country	Name	City	State
China	TheFirst Affiliated Hospital Of Guangzhou Medical Collage	Guangzhou	Guangdong

Sponsors (1)

Lead Sponsor	Collaborator
The First Affiliated Hospital of Guangzhou Medical University

Country where clinical trial is conducted

China, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	change of the Neural respiratory drive	In recent studies, The efficiency of neural respiratory drive(NRD) as expressed as a ratio of minute ventilation to diaphragm electromyogram (EMGdi) in patients with COPD is lower than that in healthy subject, suggesting that, to achieve the same minute ventilatory volume, a higher neural drive is required for patients with COPD than for healthy individuals.Furthermore,levels of neural respiratory drive were related to disease severity and dyspnea.Improving the neural respiratory drive efficiency of COPD will help to relieve the clinical symptom and make the patients feel comfort. Because dyspnea relates to respiratory effort.Neural respiratory drive(NRD) and its efficiency as expressed by a ratio of ventilation to the diaphragm electromyogram(EMGdi)may be a good tool to evaluate treatment benefits in Patients with COPD.This study want to investigate the effect of noninvasive positive pressure ventilation(NPPV)on the Neural respiratory drive of COPD patients	15-20 minute	Yes
Secondary	change of the pressure-time product(PTP)	The pressure-time product(PTP)means inspiratory effort of the inspiratory muscle In COPD lung mechanical abnormality including airflow obstruction and dynamic hyperinflation and intrinsic positive end-expiratory pressure increase the work load of the respiratory muscles,which will lead to higher inspiratory work. As a result,The efficiency of neural respiratory drive as expressed as a ratio of minute ventilation to diaphragm electromyogram (EMGdi) in patients with COPD is lower than that in healthy subject.This study want to investigate the effect of noninvasive positive pressure ventilation(NPPV)on the inspiratory muscle load of the COPD patients	15-20 minute	Yes