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Djeddi D, Stephan-Blanchard E, Léké A, Ammari M, Delanaud S, Lemaire-Hurtel AS, Bach V, Telliez F. Effects of Smoking Exposure in Infants on Gastroesophageal Reflux as a Function of the Sleep-Wakefulness State. J Pediatr 2018; 201:147-153. [PMID: 30041936 DOI: 10.1016/j.jpeds.2018.05.057] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 05/14/2018] [Accepted: 05/31/2018] [Indexed: 10/28/2022]
Abstract
OBJECTIVE To determine whether perinatal smoking exposure is associated with gastroesophageal reflux (GER)-related changes in sleep-wakefulness states in neonates. STUDY DESIGN Thirty-one neonates, referred for the investigation of suspected GER, were recruited and underwent multichannel impedance-pH monitoring and synchronized 8- to 12-hour polysomnography. The infants' exposure to tobacco smoke was estimated by means of a urine cotinine assay. The total number, frequency (h-1), and mean duration (minutes) of GER-pH (reflux events detected by the pH electrode only) and GER-imp (reflux events with bolus movement detected by impedance) events were determined. Intergroup differences (smoking-exposed group vs nonexposed group) were probed with nonparametric, unpaired Mann-Whitney U tests. A χ2 test was used to assess a possible intergroup difference in bolus retrograde migration during GER-imp events. RESULTS According to the urine cotinine assay, 21 of the 31 neonates had been exposed to cigarette smoke during the perinatal period. The number (and frequency) of GER-imp was significantly greater (P = .016) in the exposed group (29 [0-90]) than in the nonexposed group (12 [2-35]). Migration of the esophageal bolus from the distal segment to the most proximal segment was significantly more frequent (P = .016) in the exposed group (83% of GER) than in the nonexposed group (41%). The GER pattern associated with smoking exposure was particularly obvious during Rapid eye movement sleep. CONCLUSIONS The more frequent occurrence and greater proximal migration of GER-imp in the smoking-exposed group (especially during rapid eye movement sleep) may have clinical relevance. Smoking exposure is a preventable risk factor for limiting the occurrence of GER in neonates.
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Affiliation(s)
- Djamal Djeddi
- PériTox Laboratory (UMR-I 01), University Health Research Center, Faculty of Medicine, Jules Verne University of Picardy, Amiens, France; Pediatric Gastroenterology and Nutrition Unit, Amiens University Medical Center, Amiens, France
| | - Erwan Stephan-Blanchard
- PériTox Laboratory (UMR-I 01), University Health Research Center, Faculty of Medicine, Jules Verne University of Picardy, Amiens, France
| | - André Léké
- PériTox Laboratory (UMR-I 01), University Health Research Center, Faculty of Medicine, Jules Verne University of Picardy, Amiens, France; Pediatric Gastroenterology and Nutrition Unit, Amiens University Medical Center, Amiens, France; Neonatal and Pediatric Intensive Care Unit, Amiens University Medical Center, Amiens, France
| | - Mohamed Ammari
- PériTox Laboratory (UMR-I 01), University Health Research Center, Faculty of Medicine, Jules Verne University of Picardy, Amiens, France
| | - Stephane Delanaud
- PériTox Laboratory (UMR-I 01), University Health Research Center, Faculty of Medicine, Jules Verne University of Picardy, Amiens, France
| | | | - Véronique Bach
- PériTox Laboratory (UMR-I 01), University Health Research Center, Faculty of Medicine, Jules Verne University of Picardy, Amiens, France
| | - Frédéric Telliez
- PériTox Laboratory (UMR-I 01), University Health Research Center, Faculty of Medicine, Jules Verne University of Picardy, Amiens, France.
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Assessment of tobacco smoke effects on neonatal cardiorespiratory control using a semi-automated processing approach. Med Biol Eng Comput 2018; 56:2025-2037. [PMID: 29744654 DOI: 10.1007/s11517-018-1827-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Accepted: 04/04/2018] [Indexed: 12/20/2022]
Abstract
A semi-automated processing approach was developed to assess the effects of early postnatal environmental tobacco smoke (ETS) on the cardiorespiratory control of newborn lambs. The system consists of several steps beginning with artifact rejection, followed by the selection of stationary segments, and ending with feature extraction. This approach was used in six lambs exposed to 20 cigarettes/day for the first 15 days of life, while another six control lambs were exposed to room air. On postnatal day 16, electrocardiograph and respiratory signals were obtained from a 6-h polysomnographic recording. The effects of postnatal ETS exposure on heart rate variability, respiratory rate variability, and cardiorespiratory interrelations were explored. The unique results suggest that early postnatal ETS exposure increases respiratory rate variability and decreases the coupling between cardiac and respiratory systems. Potentially harmful consequences in early life include unstable breathing and decreased adaptability of cardiorespiratory function, particularly during early life challenges, such as prematurity or viral infection. Graphical abstract ᅟ.
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Brisebois S, Samson N, Fortier PH, Doueik AA, Carreau AM, Praud JP. Effects of reflux laryngitis on non-nutritive swallowing in newborn lambs. Respir Physiol Neurobiol 2014; 200:57-63. [PMID: 24893350 DOI: 10.1016/j.resp.2014.05.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Revised: 05/13/2014] [Accepted: 05/27/2014] [Indexed: 11/15/2022]
Abstract
Reflux laryngitis in infants may be involved not only in laryngeal disorders, but also in disorders of cardiorespiratory control through its impact on laryngeal function. Our objective was to study the effect of reflux laryngitis on non-nutritive swallowing (NNS) and NNS-breathing coordination. Two groups of six newborn lambs, randomized into laryngitis and control groups, were surgically instrumented for recording states of alertness, swallowing and cardiorespiratory variables without sedation. A mild to moderate reflux laryngitis was induced in lambs from the experimental group. A significant decrease in the number of NNS bursts and apneas was observed in the laryngitis group in active sleep (p=0.03). In addition, lower heart and respiratory rates, as well as prolonged apnea duration (p<0.0001) were observed. No physiologically significant alterations in NNS-breathing coordination were observed in the laryngitis group. We conclude that a mild to moderate reflux laryngitis alters NNS burst frequency and autonomous control of cardiac activity and respiration in lambs.
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Affiliation(s)
- Simon Brisebois
- Department of Surgery, ENT Division, Université de Sherbrooke, 3001 12(e) Avenue Nord, Sherbrooke (QC), Canada J1H 5N4
| | - Nathalie Samson
- Department of Pediatrics, Université de Sherbrooke, 3001 12(e) Avenue Nord, Sherbrooke (QC), Canada J1H 5N4; Department of Physiology, Université de Sherbrooke, 3001 12(e) Avenue Nord, Sherbrooke (QC), Canada J1H 5N4
| | - Pierre-Hugues Fortier
- Department of Surgery, ENT Division, Université de Sherbrooke, 3001 12(e) Avenue Nord, Sherbrooke (QC), Canada J1H 5N4
| | - Alexandre A Doueik
- Department of Pathology, Université de Sherbrooke, 3001 12(e) Avenue Nord, Sherbrooke (QC), Canada J1H 5N4
| | - Anne-Marie Carreau
- Department of Pediatrics, Université de Sherbrooke, 3001 12(e) Avenue Nord, Sherbrooke (QC), Canada J1H 5N4; Department of Physiology, Université de Sherbrooke, 3001 12(e) Avenue Nord, Sherbrooke (QC), Canada J1H 5N4
| | - Jean-Paul Praud
- Department of Pediatrics, Université de Sherbrooke, 3001 12(e) Avenue Nord, Sherbrooke (QC), Canada J1H 5N4; Department of Physiology, Université de Sherbrooke, 3001 12(e) Avenue Nord, Sherbrooke (QC), Canada J1H 5N4; Department of Surgery, ENT Division, Université de Sherbrooke, 3001 12(e) Avenue Nord, Sherbrooke (QC), Canada J1H 5N4.
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