Tidal breathing flow measurement in awake young children by using impedance pneumography

Characteristics of tidal breathing (TB) relate to lung function and may be assessed even in young children. Thus far, the accuracy of impedance pneumography (IP) in recording TB flows in young children with or without bronchial obstruction has not been evaluated. The aim of this study was to evaluate the agreement between IP and direct flow measurement with pneumotachograph (PNT) in assessing TB flow and flow-derived indices relating to airway obstruction in young children. Tidal flow was recorded for 1 min simultaneously with IP and PNT during different phases of a bronchial challenge test with methacholine in 21 wheezy children aged 3 to 7 years. The agreement of IP with PNT was found to be excellent in direct flow signal comparison, the mean deviation from linearity ranging from 2.4 to 3.1% of tidal peak inspiratory flow. Methacholine-induced bronchoconstriction or consecutive bronchodilation induced only minor changes in the agreement. Between IP and PNT, the obstruction-related tidal flow indices were equally repeatable, and agreement was found to be high, with intraclass correlation coefficients for TPTEF/ TE, VPTEF/ VE, and parameter S being 0.94, 0.91, and 0.68, respectively. Methacholine-induced changes in tidal flow indices showed significant associations with changes in mechanical impedance of the respiratory system assessed by the oscillometric technique, with the highest correlation found in VPTEF/ VE ( r = −0.54; P < 0.005 and r = −0.55; P < 0.005 by using IP or PNT, respectively). The results indicate that IP can be considered as a valid method for recording tidal airflow profiles in young children with wheezing disorders.

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Measurement of tidal breathing flows in infants using impedance pneumography

European Respiratory Journal ◽

10.1183/13993003.00926-2016 ◽

2016 ◽

Vol 49 (2) ◽

pp. 1600926 ◽

Cited By ~ 15

Author(s):

Leo Pekka Malmberg ◽

Ville-Pekka Seppä ◽

Anne Kotaniemi-Syrjänen ◽

Kristiina Malmström ◽

Merja Kajosaari ◽

...

Keyword(s):

Lung Function ◽

Tidal Flow ◽

Mean Deviation ◽

Flow Volume ◽

Tidal Breathing ◽

Impedance Pneumography ◽

Similar Association ◽

Residual Capacity ◽

The Mean ◽

Airway Conductance

Tidal breathing flow volume (TBFV) profiles have been used to characterise altered lung function. Impedance pneumography (IP) is a novel option for assessing TBFV curves noninvasively. The aim of this study was to extend the application of IP for infants and to estimate the agreement between IP and direct pneumotachograph (PNT) measurements in assessing tidal airflow and flow-derived indices.Tidal flow profiles were recorded for 1 min simultaneously with PNT and uncalibrated IP at baseline in 44 symptomatic infants, and after methacholine-induced bronchoconstriction in a subgroup (n=20).The agreement expressed as the mean deviation from linearity ranged between 3.9 and 4.3% of tidal peak inspiratory flow, but was associated with specific airway conductance (p=0.002) and maximal flow at functional residual capacity (V′maxFRC) (p=0.004) at baseline. Acute bronchoconstriction induced by methacholine did not significantly affect the agreement of IP with PNT. TBFV indices derived from IP were slightly underestimated compared to PNT, but were equally well repeatable and associated with baseline V′maxFRC (p=0.012 and p=0.013, respectively).TBFV profiles were consistent between IP and PNT in most infants, but the agreement was affected by reduced lung function. TBFV parameters were not interchangeable between IP and PNT, but had a similar association with lung function in infants.

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Tidal Flow Measurement in the Decision to Decannulate the Pediatric Patient

Annals of Otology Rhinology & Laryngology ◽

10.1177/000348948509400507 ◽

1985 ◽

Vol 94 (5) ◽

pp. 454-457 ◽

Cited By ~ 18

Author(s):

George B. Mallory ◽

Rebecca Mutich ◽

James S. Reilly ◽

Margaret A. Kenna ◽

Etsuro K. Motoyama ◽

...

Keyword(s):

Pediatric Patient ◽

Flow Measurement ◽

Peak Flow ◽

Tidal Flow ◽

Inspiratory Flow ◽

Tidal Breathing ◽

Flow Measurements ◽

Peak Inspiratory Flow

Measurements of peak inspiratory flow obtained through the tracheostomy cannula (MIFt) during tidal breathing were compared to peak inspiratory flow measurements obtained through the mouth (MIFm) in 40 children to assess physiologic readiness to decannulate the tracheostomized pediatric patient. Ratio of peak flow MIFm/MIFt was 1.40 for 34 successfully decannulated children compared to 0.83 for 22 unsuccessful attempts (p < 0.01). Tidal flow measurements are highly predictive (84 %) in identifying children who are unlikely to be ready for decannulation. A schema is proposed to utilize tidal flow measurements as the first step in the decannulation process.

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Respiratory Measurement Utilizing a Novel Laser Displacement Technique: Normal Tidal Breathing

Biomedical Instrumentation & Technology ◽

10.2345/0899-8205-43.4.327 ◽

2009 ◽

Vol 43 (4) ◽

pp. 327-331 ◽

Cited By ~ 3

Author(s):

Jeff Hargrove ◽

Eric D. Zemper ◽

Mary L. Jannausch

Keyword(s):

Control Volume ◽

Measurement Techniques ◽

Intraclass Correlation ◽

Correlation Coefficients ◽

Laser Sensor ◽

Tidal Breathing ◽

Displacement Sensors ◽

Respiratory Inductive Plethysmography ◽

Volume Measurements ◽

Inductive Plethysmography

Abstract A novel technique for achieving plethysmography measurements utilizing noncontact laser displacement sensors is described. This method may have utility in measuring respiratory and pulmonary function similar to that of respiratory inductive plethysmography. The authors describe the apparatus and method and provide results of a validation study comparing respiratory excursion data obtained by (1) the laser sensor technique, (2) standard respiratory inductive plethysmography (RIP), and (3) lung volume measurements determined by pressure variations in a control volume. Six healthy volunteers (five female, one male, ages ranging from 19 to 23 years) were measured for tidal breathing excursions simultaneously via all three measurement techniques. Results: Excellent correlation between the techniques was shown. Pairwise comparisons among all three measurement techniques across all subjects showed intraclass correlation coefficients of 0.995 in each case. These results indicate the laser plethysmograph (LP) system provides results that are, at a minimum, equivalent to those of the RIP at the two sites commonly measured by RIP. Use of the LP system has the potential to provide much more extensive and precise measurements of chest wall function and the respiratory musculature.

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Factors Associated with Positive Adenosine Challenge Test in Young Children with Suspected Asthma

Pediatric Allergy Immunology and Pulmonology ◽

10.1089/ped.2019.1028 ◽

2019 ◽

Vol 32 (3) ◽

pp. 103-108

Author(s):

Gabriel Levin ◽

Shlomo Cohen ◽

Chaim Springer ◽

Avraham Avital ◽

Elie Picard ◽

...

Keyword(s):

Young Children ◽

Challenge Test ◽

Factors Associated

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284 NON-INVASIVE LUNG FUNCTION TESTING DURING TIDAL BREATHING IN AWAKE YOUNG CHILDREN WITH ASTHMA

Pediatric Research ◽

10.1203/00006450-199407000-00284 ◽

1994 ◽

Vol 36 (1) ◽

pp. 50A-50A

Author(s):

Bent H Klug ◽

Hans Bisgaard

Keyword(s):

Lung Function ◽

Young Children ◽

Tidal Breathing ◽

Lung Function Testing ◽

Non Invasive ◽

Children With Asthma ◽

Function Testing

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Airway obstruction is associated with reduced variability in specific parts of the tidal breathing flow–volume curve in young children

ERJ Open Research ◽

10.1183/23120541.00028-2019 ◽

2019 ◽

Vol 5 (2) ◽

pp. 00028-2019 ◽

Cited By ~ 2

Author(s):

Ville-Pekka Seppä ◽

Anton Hult ◽

Javier Gracia-Tabuenca ◽

Marita Paassilta ◽

Jari Viik ◽

...

Keyword(s):

Young Children ◽

Airway Obstruction ◽

Flow Volume ◽

Tidal Breathing ◽

Volume Curve ◽

Flow Volume Curve

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Reliability of Effort Perception for Regulating Exercise Intensity in Children Using the Cart and Load Effort Rating (CALER) Scale

Pediatric Exercise Science ◽

10.1123/pes.12.4.388 ◽

2000 ◽

Vol 12 (4) ◽

pp. 388-397 ◽

Cited By ~ 28

Author(s):

Roger G. Eston ◽

Gaynor Parfitt ◽

Laura Campbell ◽

Kevin L. Lamb

Keyword(s):

Young Children ◽

Exercise Intensity ◽

Intraclass Correlation ◽

Preliminary Evidence ◽

Cycle Ergometer ◽

Limits Of Agreement ◽

Warm Up ◽

Effort Perception ◽

Objective Feedback ◽

Effort Rating

The purpose of this study was to assess whether young children could reliability regulate exercise intensity production after several practice trials, without reference to objective feedback measures. The study used a new 10-point scale (Cart and Load Effort Rating [CALER] Scale), which depicts a child on a bicycle, at various stages of exertion, towing a cart in which the load increases progressively. After warm-up, 20 children, aged 7–10 years, performed an intermittent, effort production protocol at CALER 2, 5, and 8 on a cycle ergometer. This was repeated on three further occasions in the next 4 weeks. An increase in PO across trials (44, 65, and 79 W at CALER 2, 5, and 8, respectively) confirmed that the children understood the scale. A Bland and Altman limits of agreement (LoA) analysis and an intraclass correlation analysis (ICC) between trials (T) indicated that reliability improved with practice. Intertrial comparisons of overall reliability from T1 to T2 and from T3 to T4 ranged from 0.76 to 0.97 and an improvement in the overall bias ± 95% limits of agreement from −12 ± 19 W to 0 ± 10 W. This study is the first to apply more than two repeated effort production trials in young children and provides strong evidence that practice improves the reliability of effort perception in children. The data also provide preliminary evidence for the validity of the CALER Scale in children aged 7–10 years.

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