Regression Equations of Respiratory Impedance Measured by Forced Oscillation Technique for Indian Children

De, Sajal; Banerjee, Nalok; Tiwari, RR

doi:10.1007/s12098-019-03116-x

Cited by 4 publications

(6 citation statements)

References 15 publications

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“…Of note, the addition of age in the only previously published equations on the Resmon Pro, interfered with graphical comparison with equations incorporating age. 19 For Rrs8 and Xrs8, our Resmon pro were similar to those of published on the I2M device. 30,31 Predicted AX and Fres were slightly higher than previously reported on the tremoflo, 20 I2M, 30 and IOS 17 devices.…”

Section: Discussionsupporting

confidence: 72%

“…Upper (ULN) or lower limits of normal (LLN) are depicted in dash lines of the same color at their respective mean reference equations. Of note, we did not compare graphically our data with some other reference equations because of the extra complexity brought by the addition of age in their prediction models, such as those for the Resmon Pro in Indian children by Se and colleagues, 19 and for the IOS in Mexican children by Gochicoa‐Rangel 18 . [Color figure can be viewed at wileyonlinelibrary.com]…”

Section: Resultsmentioning

confidence: 99%

“…[16][17][18] Published pediatric reference values are scarce for two recently commercially available devices in Canada, which generate sinusoidal flow oscillations: one publication on the 5-11-19 Hz signal on the Resmon Pro Full (MGC Diagnostics, Milan, Italy) in Indian children. 19 and one on the 5-37 Hz signal on the tremoflo ® C-100 (Thorasys Thoracic Medical Respiratory System Inc., Montreal, Canada) in Emirate children. 20 Whether these reference values apply to multiethnic Canadian population is unclear.…”

Section: Introductionmentioning

confidence: 99%

“…Most oscillatory reference values have been published for the MasterScreen (CareFusion, Hochberg, Germany) which uses an impulse oscillometry system to generate a square wave 16–18 . Published pediatric reference values are scarce for two recently commercially available devices in Canada, which generate sinusoidal flow oscillations: one publication on the 5‐11‐19 Hz signal on the Resmon Pro Full (MGC Diagnostics, Milan, Italy) in Indian children 19 . and one on the 5–37 Hz signal on the tremoflo® C‐100 (Thorasys Thoracic Medical Respiratory System Inc., Montreal, Canada) in Emirate children 20 .…”

Section: Introductionmentioning

confidence: 99%

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Reference values for respiratory sinusoidal oscillometry in children aged 3 to 17 years

Ducharme

Smyrnova

Lawson

et al. 2022

Pediatric Pulmonology

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Background New oscillometry devices allowing quantification of respiratory function using tidal breathing are commercially available, but reference equations are lacking for the multiethnic Canadian pediatric population. Methods We conducted a prospective cross‐sectional study of healthy children carefully selected for absence of asthma, atopy, tobacco smoke, obesity, prematurity, and recent respiratory infection. Triplicate measures were obtained of respiratory system resistance (Rrs) and reactance (Xrs), area under the reactance curve (AX) and resonant frequency (Fres) on four signals, whose testing order was randomized: two signals on the Resmon Pro Full (8 Hz and 5‐11‐19 Hz) and two signals on the tremoflo C‐100 (5–37 Hz and 7–41 Hz). Feasibility was defined as the ability to obtain valid reproducible results. Prediction equations and 95% confidence intervals were derived for whole‐ and within‐breath Rrs and Xrs and for AX and Fres, using linear regression or Generalized Additive Models for Location, Scale and Shape. Results Of 306 children randomized, valid and reproducible results on ≥1 signal were obtained in 299 (98%) multiethnic (69% Caucasians: 8% Black: 23% Others) children aged 3–17 years, 91–189 cm tall. Standing height was the strongest predictor with no significant effect of sex, age, body mass index or ethnicity. Significant within‐patient differences were observed between Resmon Pro and tremoflo C‐100 measurements, justifying the derivation of device‐specific reference equations. Conclusion Valid reproducible oscillometry measurements are highly feasible in children aged 3 years and older. Device‐specific reference equations, valid for our multiethnic population, are derived.

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Section: Discussionsupporting

confidence: 72%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Reference values for respiratory sinusoidal oscillometry in children aged 3 to 17 years

Ducharme

Smyrnova

Lawson

et al. 2022

Pediatric Pulmonology

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“…The study by De et al [9] published in this issue has determined FOT prediction equations for within breath and whole breath respiratory impedance by multiple linear regression model in healthy Indian school children aged 5-17 years. The resistance and reactance were measured at frequencies of 5, 11 and 19 Hz.…”

mentioning

confidence: 99%

Indigenous Regression Equations for Forced Oscillation Technique – A Much Needed Affair

Gupta

Kabra

2020

Indian J Pediatr

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Measurement of lung function is an essential component for making decision in patients with obstructive lung diseases. Spirometry is considered as the gold standard for assessment of lung function, both for diagnosis and monitoring in patients with asthma. However, it is difficult to be performed by smaller children due to its effort dependent nature and need for cooperation. Forced Oscillation technique (FOT) is a novel and effort independent pulmonary function test for diagnosis of airway obstruction requiring only tidal breathing maneuver. FOT measures the mechanical properties of respiratory system by imposing multiple sinusoidal pressure waves of different frequencies on tidal breaths and determines various parameters which include impedance (Zrs), resistance (Rrs), reactance (Xrs), resonant frequency (RF) and area under reactance (AX) [1]. The problem with the use of FOT is the nonavailability of standard reference values or equations which preclude their utility on global basis. Also, the normal values of Rrs and Xrs depend on ethnicity, gender, standing height, age, body weight, and measuring techniques which tend to differ among different populations. Hence, it is important to have local reference values for their interpretation.Reference equations determine the lung function values of a single patient by comparing his/her data to the data distributed in the reference population while regression equations determine the expected values of lung function as a function of age, weight and height [2]. Several studies have been done in various populations to generate the reference values for FOT both in adults and children using reference or regression equations determined by multiple linear regression models [3][4][5][6]. It has been observed that the resistance and reactance values vary significantly with age and height in children with height being the strongest covariate in all previous studies in children [3,4,7]. Studies in Caucasian and Italian population have shown more or less similar predicted values while variable values were observed in Mexican population indicating non-applicability of predicted values of one place on global basis [8].The study by De et al. [9] published in this issue has determined FOT prediction equations for within breath and whole breath respiratory impedance by multiple linear regression model in healthy Indian school children aged 5-17 years. The resistance and reactance were measured at frequencies of 5, 11 and 19 Hz. Standing height was found to have significant correlation with Zrs as well as for R5 and X5 which is similar to other studies. Gender based differences were also found in the present study with lower R5 and X5 in boys than girls after 14 y of age. The study has determined regression equations for within breath impedance unlike previous studies. The limitations of the study include involvement of single center and non inclusion of preschool children (3-5 years) where FOT may be considered more useful. Z scores were not determined for the predictive values to de...

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Lung Function Reference Equations for Indian Ethnic Groups Based on a Handheld Forced Oscillation Device for Age 9–19 Years

et al. 2022

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Regression Equations of Respiratory Impedance Measured by Forced Oscillation Technique for Indian Children

Cited by 4 publications

References 15 publications

Reference values for respiratory sinusoidal oscillometry in children aged 3 to 17 years

Reference values for respiratory sinusoidal oscillometry in children aged 3 to 17 years

Indigenous Regression Equations for Forced Oscillation Technique – A Much Needed Affair

Lung Function Reference Equations for Indian Ethnic Groups Based on a Handheld Forced Oscillation Device for Age 9–19 Years

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