Effect of Continuous Positive Airway Pressure Delivered by Two Different Modalities on Breathing Pattern in Preterm Infants

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Total Enrollment

10 participants

Study Classification

OBSERVATIONAL

Study Start Date

2011-05-31

Study Completion Date

2012-12-31

Brief Summary

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In this study, the investigators want to observe how continuous positive airway pressure delivered by two different modalities affects breathing pattern in small preterm infants. Using a specialized feeding tube in the stomach, the investigators can measure and compare how the diaphragm (a large breathing muscle) might be affected by those two modalities.

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Detailed Description

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Many preterm very low birth weight infants require continuous positive airway pressure(CPAP) for breathing support because of lung immaturity. CPAP can be delivered by the infant flow(TM) device which is well studied. Prolonged use of nasal prongs CPAP has been shown to cause discomfort and, rarely, nasal injury leading to long term disfigurement. On the other hand, High flow nasal cannula (HFNC) ,which is another modality of delivering CPAP, creates less pressure on the nose and less disfiguring effect but previous research showed that the use of HFNC may be less effective than IF-CPAP in providing breathing support in these infants.

We plan to study 10 stable preterm infants born less than 32 weeks' gestation and 1.5 kilograms at birth after being stable for at least 48hours on IF-CPAP. babies will be randomized to start on IF-CPAP or HFNC for 30 minutes. After 45 minutes of adaptation, baby will be switched to the other modality for another 30 minutes. By inserting a specialized feeding tube with sensors into the stomach, we can measure the electrical activity of the diaphragm (EAdi). By analysing EAdi with each modality of delivering CPAP, we want to directly assess how HFNC affects breathing compared to IF-CPAP.

Conditions

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Continuous Positive Airway Pressure

Study Design

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Observational Model Type

CASE_CROSSOVER

Study Time Perspective

PROSPECTIVE

Study Groups

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EAdi 1

babies in this group will first receive CPAP through IF-CPAP for 30 minutes. After another 45 minutes, they will be switched to HFNC for 30 minutes. EAdi will be recorded for the last 15 minutes of each 30 minutes period.

No interventions assigned to this group

EAdi 2

babies in this group will first receive CPAP through HFNC for 30 minutes. After another 45 minutes, they will be switched to IF-CPAP for 30 minutes. EAdi will be recorded for the last 15 minutes of each 30 minutes period.

No interventions assigned to this group

Eligibility Criteria

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Inclusion Criteria

* Birth weights ≤ 1500g
* Gestational age less than 32 week
* Stable on nasal continuous positive airway pressure (CPAP) of 5-6cmH20 support for at least 48 hours
* Treated with methylxanthines for apnea of prematurity
* In less than 35% oxygen

Exclusion Criteria

* Congenital and acquired problem of the gastrointestinal tract
* Phrenic nerve injury and/or diaphragm paralysis
* Esophageal perforation/tracheoesophageal fistula
* Congenital/acquired neurological deficit and/or seizures
* Hemodynamic instability
* Congenital heart disease (including symptomatic patent ductus arteriosus)
* Undergoing treatment for sepsis or pneumonia
* Use of muscle relaxants, narcotic analgesics, or gastric motility agents
* Congenital anomalies of respiratory tract (e.g. CCAM)
* Infants requiring more than 35% oxygen
* Infants with facial anomalies
* Infants with pneumothorax and/or pneumomediatinum
* Infants in the immediate postoperative period
* Infants with significant gastric residues and vomiting

Minimum Eligible Age

2 Days

Maximum Eligible Age

12 Months

Eligible Sex

ALL

Accepts Healthy Volunteers

No