Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Oral feeding of neonates while on nasal continuous positive airway pressure (NCPAP) is a common practice in many neonatal intensive care units (NICU) all over the country. However the safety of such practice has never been established. The Investigators hypothesize that mechanoreceptors, which should perceive sensory input from the liquid bolus, may be altered by the reception of pressurized airflow provided by the NCPAP, hence increase risk of aspiration. In this study, changes in the pharyngeal phase of swallowing were identified using video fluoroscopic swallow studies (VFSS) for infants while on NCPAP as compared to off NCPAP.
Preterm infants with underdeveloped lungs and term infants with cardio-respiratory illness frequently need to be placed on ventilatory assistance. Nasal Continuous Positive Airway Pressure (NCPAP) has been proven to be an effective mode of noninvasive ventilation in neonates, as it delivers positive pressure to the airway throughout the respiratory cycle. NCPAP works by improving the breathing pattern in neonates; it increases the mean airway pressure, stents the upper airway, decreases proximal airway resistance, reduces physiological dead space, optimizes lung recruitment and improves diaphragmatic function. While many infants in the Neonatal Intensive Care Units (NICUs) require NCPAP, many of their other medical and developmental needs such as initiating oral feedings need to be addressed. Oral feeding of neonates while on NCPAP is a common practice in many NICUs, however the effect of such practice on neonatal swallowing mechanism has never been investigated.
Swallowing is a complex sensorimotor function that allows infant to safely and effectively ingest liquid nutrition. The ability of an infant to successfully feed is dependent on the precise interconnection of anatomy, physiology and neurology pathways. Afferent sequences play an integral role in the infant swallowing mechanism as sensory feedback is required during all phases of swallowing to allow appropriate positioning of anatomic structures, as well as to modulate the strength, velocity, and timing of muscle contractions. Sensory information is received from various types of sensory receptors distributed throughout the oral cavity, pharynx, larynx and esophagus. Localized areas of the infant's anatomy are known to have particular types of sensory receptors that are excited by specific stimuli which elicit appropriate motor movements.
One of the most densely populated sensory receptors are the mechanoreceptors which are sensitive to touch and pressure to help decipher the shape, texture, size and temperature of the bolus about to be swallowed. The mechanoreceptors are also sensitive to the pressure and movement of air flow during breathing.
The sensations perceived by these receptors are responsible for sending afferent sensory information to the medullary region of the brainstem where they are processed by the central pattern generators (CPGs). CPGs are composed of dedicated networks of interneurons that are responsible to sequence and activate different motor neurons at specified intensities to generate motor patterns. Both the swallowing CPG and the respiratory CPG are housed within the medulla. The close proximity of these neurons allows for precise swallow and breathing coordination. A close interrelationship between the swallowing and respiratory processes is further evident as they encompass shared anatomic structures and muscular components within the pharynx, and act as physiologically and biomechanically reciprocal events.
This close interrelationship between swallowing and breathing has led to some controversy and difference in opinion among neonatologists on the decision to start oral feedings while on NCPAP. Although there is no research directly related to the effect of NCPAP on swallowing process in neonates, NCPAP has been reported to induce dilatation of the laryngeal opening in preterm infants and inhibit the swallow reflex in adults.
For preterm infants, some neonatologists advocate initiation of oral feeds at 34 weeks gestational age, even if they require NCPAP; others strictly wait for NCPAP to be discontinued before oral feeding is established, fearing that infants may have difficulty coordinating breathing and swallowing acts, resulting in airway compromise. For term infants, many propose that oral feedings can be established once physiologic stability is demonstrated, either with or without NCPAP. Such controversies exist due to lack of evidence on the effect(s) of NCPAP on swallowing safety in human neonates.
To our knowledge no studies have been completed on human infants to evaluate the effect of NCPAP on the pharyngeal swallowing mechanism. Previous studies utilizing neonatal lambs, revealed that the application of NCPAP had no deleterious effect on cardiopulmonary safety, feeding efficiency and on nutritive swallowing- breathing coordination.
This study was designed with the aim to effectively assess the effects of NCPAP on the pharyngeal swallow mechanism in human neonates. The investigators hypothesize that the presence of NCPAP will lead to alterations in the sensorimotor sequence of the pharyngeal swallowing mechanism, increasing the risk for airway compromise and aspiration. The mechanoreceptors, which perceive sensory input from the liquid bolus, may be altered by the reception of continuous stream of airflow, provided by the NCPAP.
Not provided
Not provided
Not provided
Not provided
| Label | Type | Description | Intervention Names |
|---|---|---|---|
| on NCPAP | Active Comparator | Once consented, each participant underwent a video fluoroscopic swallow study (VFSS) while NCPAP was administered via a RAM cannula® (intervention). With the NCPAP turned on each participant was fed room temperature thin liquid barium (Varibar® Thin Liquid Barium Sulfate for Suspension) from a standard bottle (60ml Similac® Volu-Feeder® with an attached Similac® Infant Nipple and Ring (standard flow), a total of 20 swallows were recorded. These swallows were termed "on NCPAP" swallows. The swallows were assessed in real time for any swallowing dysfunction. |
|
| Off NCPAP | Active Comparator | Immediately following the "on NCPAP" condition, an additional 20 swallows were recorded under VFSS with the NCPAP turned off (intervention). These swallows were termed "off NCPAP" swallows. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| NCPAP | Device | Does NCPAP induce dysphagia in neonates? Each baby will be evaluated for dysphagia (using fluoroscopy) while on NCPAP and off NCPAP. |
|
| Measure | Description | Time Frame |
|---|---|---|
| Pharyngeal Phase Dysphagia | presence of atypical or disordered movements during the pharyngeal phase of swallowing | <5 seconds post swallow trigger |
| Measure | Description | Time Frame |
|---|---|---|
| Tracheal Aspiration | the occurrence of barium below the level of the true vocal cords | <5 seconds post swallow trigger |
| Percentage of Laryngeal Length | Will be measuredmeasured by deep penetration, the occurrence of barium underneath the epiglottis, in the laryngeal vestibule to the level of the vocal folds |
Not provided
Inclusion Criteria:
Exclusion Criteria:
Not provided
Not provided
Not provided
Not provided
Not provided
| Name | Affiliation | Role |
|---|---|---|
| Nazeeh Hanna, MD | NYU Langone Winthrop University Hospital | Principal Investigator |
Not provided
Chart review- 26 preterm infants on nCPAP. Weaned off nCPAP before approaching-10. Excluded- 4 (h/o upper airway anomalies, brain injury, etc.). Eligible-12. Declined consent -5. Consented-7. Screening and VFSS completed-7. Analyzed-7. None of the enrolled participants were excluded from the trial before assignment to groups.
Recruitment Period: September 2014- August 2015. All participants were recruited from the Neonatal Intensive Care Unit (NICU) at Winthrop University Hospital, Mineola, NY.
Not provided
| ID | Title | Description |
|---|---|---|
| FG000 | VFSS on nCPAP Then Off nCPAP | Once consented, each participant underwent a video fluoroscopic swallow study (VFSS) while NCPAP was administered via a RAM cannula® (intervention). With the NCPAP turned on each participant was fed room temperature thin liquid barium (Varibar® Thin Liquid Barium Sulfate for Suspension) from a standard bottle (60ml Similac® Volu-Feeder® with an attached Similac® Infant Nipple and Ring (standard flow), a total of 20 swallows were recorded. These swallows were termed "on NCPAP" swallows. The swallows were assessed in real time for any swallowing dysfunction. Immediately following the "on NCPAP" condition, an additional 20 swallows were recorded under VFSS with the NCPAP turned off (intervention). These swallows were termed "off NCPAP" swallows. |
| Title | Milestones | Reasons Not Completed | |||||
|---|---|---|---|---|---|---|---|
| Overall Study |
|
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
|
| Varibar® Thin Liquid Barium Sulfate for Suspension | Dietary Supplement | Liquid barium is used as a contrast material to allow visualization of swallowed boluses under fluoroscopy. |
|
| <2 seconds post swallow trigger |
| Silent Aspiration | The occurrence of barium below the level of the vocal folds (aspiration) with no occurrence of cough (silent). This is a measure of absence of a cough during aspiration (silent aspiration). | <5 seconds post swallow trigger |
| Nasopharyngeal Reflux | the occurrence of barium detected in the nasopharynx, posterior or superior to the velum | <2 seconds post swallow trigger |
| Pharyngeal Residue | the presence of residual barium coating the pharyngeal walls, pooling in the vallecula or pyriform sinuses post swallow (absent/mild/severe). This measure is subjective (mild = light coating and sever = significant coating of residual barium). | <5 seconds post swallow trigger |
| COMPLETED |
|
| NOT COMPLETED |
|
Not provided
| ID | Title | Description |
|---|---|---|
| BG000 | VFSS on nCPAP Then Off nCPAP | Once consented, each participant underwent a video fluoroscopic swallow study (VFSS) while NCPAP was administered via a RAM cannula® (intervention). With the NCPAP turned on each participant was fed room temperature thin liquid barium (Varibar® Thin Liquid Barium Sulfate for Suspension) from a standard bottle (60ml Similac® Volu-Feeder® with an attached Similac® Infant Nipple and Ring (standard flow), a total of 20 swallows were recorded. These swallows were termed "on NCPAP" swallows. The swallows were assessed in real time for any swallowing dysfunction. Immediately following the "on NCPAP" condition, an additional 20 swallows were recorded under VFSS with the NCPAP turned off (intervention). These swallows were termed "off NCPAP" swallows. |
| Units | Counts |
|---|---|
| Participants |
|
| Title | Description | Population Description | Parameter Type | Dispersion Type | Unit of Measure | Calculate Percentage | Denominator Units Selected | Denominators | Classes | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Age, Customized | Inclusion criteria: infants with a postmenstrual age (PMA) of 34 weeks or greater | Mean | Full Range | weeks |
| ||||||||||||||||
| Sex: Female, Male | Count of Participants | Participants |
| ||||||||||||||||||
| Race (NIH/OMB) | Count of Participants | Participants |
| ||||||||||||||||||
| Region of Enrollment | Winthrop University Hospital, Mineola, NY | Count of Participants | Participants |
|
| Type | Title | Description | Population Description | Reporting Status | Anticipated Posting Date | Parameter Type | Dispersion Type | Unit of Measure | Calculate Percentage | Time Frame | Units Analyzed | Denominator Units Selected | Arm/Group Information | Denominators | Classes | Analyses | |||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Primary | Pharyngeal Phase Dysphagia | presence of atypical or disordered movements during the pharyngeal phase of swallowing | Posted | Count of Participants | Participants | <5 seconds post swallow trigger |
|
|
| ||||||||||||||||||||||||||||||
| Secondary | Tracheal Aspiration | the occurrence of barium below the level of the true vocal cords | Posted | Mean | Standard Deviation | percentage of aspiration | <5 seconds post swallow trigger |
| |||||||||||||||||||||||||||||||
| Secondary | Percentage of Laryngeal Length | Will be measuredmeasured by deep penetration, the occurrence of barium underneath the epiglottis, in the laryngeal vestibule to the level of the vocal folds | Posted | Mean | Standard Deviation | percentage of deep penetration | <2 seconds post swallow trigger |
| |||||||||||||||||||||||||||||||
| Secondary | Silent Aspiration | The occurrence of barium below the level of the vocal folds (aspiration) with no occurrence of cough (silent). This is a measure of absence of a cough during aspiration (silent aspiration). | Posted | Count of Participants | Participants | <5 seconds post swallow trigger |
| ||||||||||||||||||||||||||||||||
| Secondary | Nasopharyngeal Reflux | the occurrence of barium detected in the nasopharynx, posterior or superior to the velum | Posted | Mean | Standard Deviation | percentage of nasopharyngeal reflux | <2 seconds post swallow trigger |
| |||||||||||||||||||||||||||||||
| Secondary | Pharyngeal Residue | the presence of residual barium coating the pharyngeal walls, pooling in the vallecula or pyriform sinuses post swallow (absent/mild/severe). This measure is subjective (mild = light coating and sever = significant coating of residual barium). | Posted | Number | participants | <5 seconds post swallow trigger |
|
Not provided
Not provided
Not provided
| ID | Title | Description | Deaths (Affected) | Deaths (At Risk) | Serious Events (Affected) | Serious Events (At Risk) | Other Events (Affected) | Other Events (At Risk) |
|---|---|---|---|---|---|---|---|---|
| EG000 | on NCPAP | Once consented, each participant underwent a video fluoroscopic swallow study (VFSS) while NCPAP was administered via a RAM cannula® (intervention). With the NCPAP turned on each participant was fed room temperature thin liquid barium (Varibar® Thin Liquid Barium Sulfate for Suspension) from a standard bottle (60ml Similac® Volu-Feeder® with an attached Similac® Infant Nipple and Ring (standard flow), a total of 20 swallows were recorded. These swallows were termed "on NCPAP" swallows. The swallows were assessed in real time for any swallowing dysfunction. NCPAP: Does NCPAP induce dysphagia in neonates? Each baby will be evaluated for dysphagia (using fluoroscopy) while on NCPAP and off NCPAP. Varibar® Thin Liquid Barium Sulfate for Suspension: Liquid barium is used as a contrast material to allow visualization of swallowed boluses under fluoroscopy. | 0 | 7 | 0 | 7 | ||
| EG001 | Off NCPAP | Immediately following the "on NCPAP" condition, an additional 20 swallows were recorded under VFSS with the NCPAP turned off (intervention). These swallows were termed "off NCPAP" swallows. NCPAP: Does NCPAP induce dysphagia in neonates? Each baby will be evaluated for dysphagia (using fluoroscopy) while on NCPAP and off NCPAP. Varibar® Thin Liquid Barium Sulfate for Suspension: Liquid barium is used as a contrast material to allow visualization of swallowed boluses under fluoroscopy. | 0 | 7 | 0 | 7 |
Not provided
Not provided
Small number of subjects: Enrollment was stopped after 7 participants due to the documented risks associated with oral feeding on NCPAP. It was unethical to expose infants to harm after clear safety risk was identified.
Not provided
Not provided
Not provided
| Title | Organization | Phone | Extension | |
|---|---|---|---|---|
| Nazeeh Hanna, MD | NYU-Winthrop Hospital | 6314211424 | nazeehhanna@gmail.com |
| ID | Term |
|---|---|
| D003680 | Deglutition Disorders |
| C566881 | Respiratory Distress Syndrome In Premature Infants |
| D053120 | Respiratory Aspiration |
| D047928 | Premature Birth |
| ID | Term |
|---|---|
| D004935 | Esophageal Diseases |
| D005767 | Gastrointestinal Diseases |
| D004066 | Digestive System Diseases |
| D010608 | Pharyngeal Diseases |
| D010038 | Otorhinolaryngologic Diseases |
| D012120 | Respiration Disorders |
| D012140 | Respiratory Tract Diseases |
| D010335 | Pathologic Processes |
| D013568 | Pathological Conditions, Signs and Symptoms |
| D007752 | Obstetric Labor, Premature |
| D007744 | Obstetric Labor Complications |
| D011248 | Pregnancy Complications |
| D005261 | Female Urogenital Diseases and Pregnancy Complications |
| D000091642 | Urogenital Diseases |
Not provided
Not provided
| ID | Term |
|---|---|
| D045422 | Continuous Positive Airway Pressure |
| D013535 | Suspensions |
| ID | Term |
|---|---|
| D011175 | Positive-Pressure Respiration |
| D012121 | Respiration, Artificial |
| D058109 | Airway Management |
| D013812 | Therapeutics |
| D012138 | Respiratory Therapy |
| D003102 | Colloids |
| D045424 | Complex Mixtures |
| D004304 | Dosage Forms |
| D004364 | Pharmaceutical Preparations |
Not provided
Not provided
| Native Hawaiian or Other Pacific Islander |
|
| Black or African American |
|
| White |
|
| More than one race |
|
| Unknown or Not Reported |
|
|
|
|
|
|
|
|
|
|
|