Respiratory Muscle Function and Neural Respiratory Drive in Interstitial Lung Disease

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT02877121

Enrollment

Registered

2016-08-24

Start date

2016-06-30

Completion date

2016-09-30

Last updated

2016-12-19

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

State Key Laboratory of Respiratory Disease

Keywords

interstitial lung disease, Respiratory Muscle Function, Neural Respiratory Drive

Brief summary

The purpose of this study is to assess the Respiratory Muscle Function and Neural Respiratory Drive in Interstitial Lung Disease patients.

Detailed description

In total, 50 patients with interstitial lung disease (ILD) are going to recruited.The patients are studied at the afternoon in a semirecumbent position. After the application of topical anaesthesia (2% xylocaine), the patient will be asked to swallow two balloon-tipped catheters and the multi-pair esophageal electrode catheter through the nose into the their right position. At the first period, the stable signals of unassisted spontaneous breathing (about 10min) were chosen to be recorded. The Esophageal and gastric balloon-catheters are used to detect the intra-thoracic and abdominal pressure.The diaphragm electromyogram (EMGdi) will be recorded from a multipair esophageal electrode.The baseline data of the respiratory muscle activity will be detected by these catheters and electrode.p0.1 (the negative airway pressure generated during the first 100 ms of an occluded inspiration) will be also meassured. After the first period, the nonvolitional tests on respiratory muscle function and strength (twitch mouth and transdiaphragmatic pressure during bilateral magnetic phrenic nerve stimulation (TwPmo and TwPdi) will be done. After the second period,the patients will be ask to perform different maneuvers, including maximal inspiration against a closed valve ,maximal inspiration to total lung capacity (TLC),maximalexpiration at the total lung capacity (TLC) against a closed valve and maximal sniff from functional residual capacity(FRC).Each maneuver will repeated more than three times with an interval of 30 s or more. Inspiratory capacity(IC),global maximal inspiratory pressure (PImax), maximal sniff nasal pressure (SnPna) and maximalexpiratory pressure will be meassured with the balloon-catheters.The maximal value of the diaphragm electromyogram (EMGdi) will be recorded during these maneuvers.

Interventions

None listed

Study design

Observational model

COHORT

Eligibility

Sex/Gender

ALL

Age

18 Years to 70 Years

Healthy volunteers

Inclusion criteria

* Interstitial lung disease patient meet the diagnose criteria of interstitial lung disease

Exclusion criteria

1. Severe Cardiovascular disease 2. Pneumonia 3. Neuromuscular and chest wall deformity 4. Respiratory arrest 5. Cardiovascular instability (hypotension, arrhythmias, myocardial infarction) 6. Change in mental status; uncooperative patient

Design outcomes

Primary

Measure	Time frame
transdiaphragmatic pressure during bilateral magnetic phrenic nerve stimulation (5-20cmH2O)(TwPdi)	20-30minutes

Secondary

Measure	Time frame
the negative airway pressure generated during the first 100 ms of an occluded (p0.1)(from -0.5 to -5cmH2O)	20-30minutes
The global maximal inspiratory pressure (PImax) of the Interstitial Lung Disease	20-30minutes
the The diaphragm electromyogram (EMGdi)(10-300uv )	20-30minutes
The maximalexpiratory pressure (MEP)of the Interstitial Lung Disease patients(5-100cmH2O)	20-30minutes
The twitch mouth and during bilateral magnetic phrenic nerve stimulation (TwPmo)(from -2 to-20cmH2O)	20-30minutes
The maximal sniff nasal pressure (SnPna)of the Interstitial Lung Disease patients(5-100cmH2O)	20-30minutes

Countries

China

Outcome results