The Experts below are selected from a list of 5112 Experts worldwide ranked by ideXlab platform
Ingvild Haaland - One of the best experts on this subject based on the ideXlab platform.
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a pilot study of hot wire ultrasonic and wedge bellows Spirometer inter and intra variability
BMC Research Notes, 2017Co-Authors: Marit Elisabeth Aardal, Lene Lovendahl Svendsen, Sverre Lehmann, Tomas Mikal Eagan, Ingvild HaalandAbstract:The aim of this pilot study was to compare spirometric values obtained with different types of Spirometers, Spirometers of same type, and repeated measurements with the same Spirometer in a pulmonary function laboratory setting. 12 healthy volunteers performed spirometry on four hot-wire (SensorMedics), two ultrasonic (Spirare) and one wedge-bellows (Vitalograph S) Spirometers, according to ATS/ERS (American Thoracic Society/European Respiratory Society) guidelines. Spirometric values were compared using linear mixed models analysis with a random intercept for subjects and a fixed effect for type of Spirometer used. Confidence intervals and p values were adjusted for multiple comparisons. Mean ± SD (L) values for hot-wire, ultrasonic and wedge-bellows Spirometers for FVC (forced vital capacity) were 4.02 ± 0.66, 3.69 ± 0.61 and 3.93 ± 0.69, and for FEV1 (forced expiratory volume in one second) 3.06 ± 0.44, 2.95 ± 0.44 and 3.10 ± 0.49. Significant differences were found between hot-wire and ultrasonic and between wedge-bellows and ultrasonic Spirometers for FVC and FEV1, and between hot-wire and wedge-bellows Spirometers for FVC but not for FEV1. There were no significant differences between Spirometers of same type, and low mean differences in repeated measurements for all Spirometers included. In conclusion, the pilot study shows systematically higher values for FVC and FEV1 for hot-wire and wedge-bellows compared to ultrasonic Spirometers.
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a pilot study of hot wire ultrasonic and wedge bellows Spirometer inter and intra variability
European Respiratory Journal, 2016Co-Authors: Marit Elisabeth Aardal, Lene Lovendahl Svendsen, Sverre Lehmann, Tomas Mikal Eagan, Ingvild HaalandAbstract:Background: Differences in measurements between Spirometers can be a challenge in patient diagnostics and follow-up, and in research studies. Aims: The aim was to perform a pilot study to compare spirometric values obtained with different types of Spirometers, Spirometers of same type, and repeated measurements with the same Spirometer. Methods: 12 healthy volunteers performed spirometry on 4 hot-wire (SensorMedics) (HW), 2 ultrasonic (Spirare) (US) and one wedge-bellows (Vitalograph) (WB) Spirometers, according to ATS/ERS guidelines. Spirometric values were compared using paired t-tests, Bland Altman plots and one-sample t-tests (systematic bias). Results: Mean+/-SD (L) values for HW, US and WB Spirometers for FVC were 4.02+/-0.66, 3.69+/-0.61 and 3.93+/-0.69, and for FEV1 3.06+/-0.44, 2.95+/-0.44 and 3.10+/-0.49, respectively. Significant differences were found between HW and US for FVC (p<0.001) and FEV1 (p<0.001), between WB and US for FVC (p<0.001) and FEV1 (p<0.001), and between HW and WB for FVC (p<0.05), but not for FEV1 (p=0.16). Bland Altman plots, Figure 1. Mainly minor or no significant differences were found between same type of Spirometer, and repeated measurements with the same Spirometer. Conclusions: The pilot study shows systematically higher values for FVC and FEV1 for hot-wire and wedge-bellows compared to ultrasonic Spirometers. This should be investigated in larger datasets, including patients.
Tomas Mikal Eagan - One of the best experts on this subject based on the ideXlab platform.
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a pilot study of hot wire ultrasonic and wedge bellows Spirometer inter and intra variability
BMC Research Notes, 2017Co-Authors: Marit Elisabeth Aardal, Lene Lovendahl Svendsen, Sverre Lehmann, Tomas Mikal Eagan, Ingvild HaalandAbstract:The aim of this pilot study was to compare spirometric values obtained with different types of Spirometers, Spirometers of same type, and repeated measurements with the same Spirometer in a pulmonary function laboratory setting. 12 healthy volunteers performed spirometry on four hot-wire (SensorMedics), two ultrasonic (Spirare) and one wedge-bellows (Vitalograph S) Spirometers, according to ATS/ERS (American Thoracic Society/European Respiratory Society) guidelines. Spirometric values were compared using linear mixed models analysis with a random intercept for subjects and a fixed effect for type of Spirometer used. Confidence intervals and p values were adjusted for multiple comparisons. Mean ± SD (L) values for hot-wire, ultrasonic and wedge-bellows Spirometers for FVC (forced vital capacity) were 4.02 ± 0.66, 3.69 ± 0.61 and 3.93 ± 0.69, and for FEV1 (forced expiratory volume in one second) 3.06 ± 0.44, 2.95 ± 0.44 and 3.10 ± 0.49. Significant differences were found between hot-wire and ultrasonic and between wedge-bellows and ultrasonic Spirometers for FVC and FEV1, and between hot-wire and wedge-bellows Spirometers for FVC but not for FEV1. There were no significant differences between Spirometers of same type, and low mean differences in repeated measurements for all Spirometers included. In conclusion, the pilot study shows systematically higher values for FVC and FEV1 for hot-wire and wedge-bellows compared to ultrasonic Spirometers.
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a pilot study of hot wire ultrasonic and wedge bellows Spirometer inter and intra variability
European Respiratory Journal, 2016Co-Authors: Marit Elisabeth Aardal, Lene Lovendahl Svendsen, Sverre Lehmann, Tomas Mikal Eagan, Ingvild HaalandAbstract:Background: Differences in measurements between Spirometers can be a challenge in patient diagnostics and follow-up, and in research studies. Aims: The aim was to perform a pilot study to compare spirometric values obtained with different types of Spirometers, Spirometers of same type, and repeated measurements with the same Spirometer. Methods: 12 healthy volunteers performed spirometry on 4 hot-wire (SensorMedics) (HW), 2 ultrasonic (Spirare) (US) and one wedge-bellows (Vitalograph) (WB) Spirometers, according to ATS/ERS guidelines. Spirometric values were compared using paired t-tests, Bland Altman plots and one-sample t-tests (systematic bias). Results: Mean+/-SD (L) values for HW, US and WB Spirometers for FVC were 4.02+/-0.66, 3.69+/-0.61 and 3.93+/-0.69, and for FEV1 3.06+/-0.44, 2.95+/-0.44 and 3.10+/-0.49, respectively. Significant differences were found between HW and US for FVC (p<0.001) and FEV1 (p<0.001), between WB and US for FVC (p<0.001) and FEV1 (p<0.001), and between HW and WB for FVC (p<0.05), but not for FEV1 (p=0.16). Bland Altman plots, Figure 1. Mainly minor or no significant differences were found between same type of Spirometer, and repeated measurements with the same Spirometer. Conclusions: The pilot study shows systematically higher values for FVC and FEV1 for hot-wire and wedge-bellows compared to ultrasonic Spirometers. This should be investigated in larger datasets, including patients.
Sverre Lehmann - One of the best experts on this subject based on the ideXlab platform.
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a pilot study of hot wire ultrasonic and wedge bellows Spirometer inter and intra variability
BMC Research Notes, 2017Co-Authors: Marit Elisabeth Aardal, Lene Lovendahl Svendsen, Sverre Lehmann, Tomas Mikal Eagan, Ingvild HaalandAbstract:The aim of this pilot study was to compare spirometric values obtained with different types of Spirometers, Spirometers of same type, and repeated measurements with the same Spirometer in a pulmonary function laboratory setting. 12 healthy volunteers performed spirometry on four hot-wire (SensorMedics), two ultrasonic (Spirare) and one wedge-bellows (Vitalograph S) Spirometers, according to ATS/ERS (American Thoracic Society/European Respiratory Society) guidelines. Spirometric values were compared using linear mixed models analysis with a random intercept for subjects and a fixed effect for type of Spirometer used. Confidence intervals and p values were adjusted for multiple comparisons. Mean ± SD (L) values for hot-wire, ultrasonic and wedge-bellows Spirometers for FVC (forced vital capacity) were 4.02 ± 0.66, 3.69 ± 0.61 and 3.93 ± 0.69, and for FEV1 (forced expiratory volume in one second) 3.06 ± 0.44, 2.95 ± 0.44 and 3.10 ± 0.49. Significant differences were found between hot-wire and ultrasonic and between wedge-bellows and ultrasonic Spirometers for FVC and FEV1, and between hot-wire and wedge-bellows Spirometers for FVC but not for FEV1. There were no significant differences between Spirometers of same type, and low mean differences in repeated measurements for all Spirometers included. In conclusion, the pilot study shows systematically higher values for FVC and FEV1 for hot-wire and wedge-bellows compared to ultrasonic Spirometers.
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a pilot study of hot wire ultrasonic and wedge bellows Spirometer inter and intra variability
European Respiratory Journal, 2016Co-Authors: Marit Elisabeth Aardal, Lene Lovendahl Svendsen, Sverre Lehmann, Tomas Mikal Eagan, Ingvild HaalandAbstract:Background: Differences in measurements between Spirometers can be a challenge in patient diagnostics and follow-up, and in research studies. Aims: The aim was to perform a pilot study to compare spirometric values obtained with different types of Spirometers, Spirometers of same type, and repeated measurements with the same Spirometer. Methods: 12 healthy volunteers performed spirometry on 4 hot-wire (SensorMedics) (HW), 2 ultrasonic (Spirare) (US) and one wedge-bellows (Vitalograph) (WB) Spirometers, according to ATS/ERS guidelines. Spirometric values were compared using paired t-tests, Bland Altman plots and one-sample t-tests (systematic bias). Results: Mean+/-SD (L) values for HW, US and WB Spirometers for FVC were 4.02+/-0.66, 3.69+/-0.61 and 3.93+/-0.69, and for FEV1 3.06+/-0.44, 2.95+/-0.44 and 3.10+/-0.49, respectively. Significant differences were found between HW and US for FVC (p<0.001) and FEV1 (p<0.001), between WB and US for FVC (p<0.001) and FEV1 (p<0.001), and between HW and WB for FVC (p<0.05), but not for FEV1 (p=0.16). Bland Altman plots, Figure 1. Mainly minor or no significant differences were found between same type of Spirometer, and repeated measurements with the same Spirometer. Conclusions: The pilot study shows systematically higher values for FVC and FEV1 for hot-wire and wedge-bellows compared to ultrasonic Spirometers. This should be investigated in larger datasets, including patients.
Marit Elisabeth Aardal - One of the best experts on this subject based on the ideXlab platform.
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a pilot study of hot wire ultrasonic and wedge bellows Spirometer inter and intra variability
BMC Research Notes, 2017Co-Authors: Marit Elisabeth Aardal, Lene Lovendahl Svendsen, Sverre Lehmann, Tomas Mikal Eagan, Ingvild HaalandAbstract:The aim of this pilot study was to compare spirometric values obtained with different types of Spirometers, Spirometers of same type, and repeated measurements with the same Spirometer in a pulmonary function laboratory setting. 12 healthy volunteers performed spirometry on four hot-wire (SensorMedics), two ultrasonic (Spirare) and one wedge-bellows (Vitalograph S) Spirometers, according to ATS/ERS (American Thoracic Society/European Respiratory Society) guidelines. Spirometric values were compared using linear mixed models analysis with a random intercept for subjects and a fixed effect for type of Spirometer used. Confidence intervals and p values were adjusted for multiple comparisons. Mean ± SD (L) values for hot-wire, ultrasonic and wedge-bellows Spirometers for FVC (forced vital capacity) were 4.02 ± 0.66, 3.69 ± 0.61 and 3.93 ± 0.69, and for FEV1 (forced expiratory volume in one second) 3.06 ± 0.44, 2.95 ± 0.44 and 3.10 ± 0.49. Significant differences were found between hot-wire and ultrasonic and between wedge-bellows and ultrasonic Spirometers for FVC and FEV1, and between hot-wire and wedge-bellows Spirometers for FVC but not for FEV1. There were no significant differences between Spirometers of same type, and low mean differences in repeated measurements for all Spirometers included. In conclusion, the pilot study shows systematically higher values for FVC and FEV1 for hot-wire and wedge-bellows compared to ultrasonic Spirometers.
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a pilot study of hot wire ultrasonic and wedge bellows Spirometer inter and intra variability
European Respiratory Journal, 2016Co-Authors: Marit Elisabeth Aardal, Lene Lovendahl Svendsen, Sverre Lehmann, Tomas Mikal Eagan, Ingvild HaalandAbstract:Background: Differences in measurements between Spirometers can be a challenge in patient diagnostics and follow-up, and in research studies. Aims: The aim was to perform a pilot study to compare spirometric values obtained with different types of Spirometers, Spirometers of same type, and repeated measurements with the same Spirometer. Methods: 12 healthy volunteers performed spirometry on 4 hot-wire (SensorMedics) (HW), 2 ultrasonic (Spirare) (US) and one wedge-bellows (Vitalograph) (WB) Spirometers, according to ATS/ERS guidelines. Spirometric values were compared using paired t-tests, Bland Altman plots and one-sample t-tests (systematic bias). Results: Mean+/-SD (L) values for HW, US and WB Spirometers for FVC were 4.02+/-0.66, 3.69+/-0.61 and 3.93+/-0.69, and for FEV1 3.06+/-0.44, 2.95+/-0.44 and 3.10+/-0.49, respectively. Significant differences were found between HW and US for FVC (p<0.001) and FEV1 (p<0.001), between WB and US for FVC (p<0.001) and FEV1 (p<0.001), and between HW and WB for FVC (p<0.05), but not for FEV1 (p=0.16). Bland Altman plots, Figure 1. Mainly minor or no significant differences were found between same type of Spirometer, and repeated measurements with the same Spirometer. Conclusions: The pilot study shows systematically higher values for FVC and FEV1 for hot-wire and wedge-bellows compared to ultrasonic Spirometers. This should be investigated in larger datasets, including patients.
Sundarrajan Asokan - One of the best experts on this subject based on the ideXlab platform.
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Pulmonary Function Test Using Fiber Bragg Grating Spirometer
Journal of Lightwave Technology, 2016Co-Authors: Shikha Ambastha, Sharath Umesh, Sundarrajan AsokanAbstract:Pulmonary function tests (PFTs) are noninvasive diagnostic tests that evaluate the functionality of the lungs. Spirometry is an established diagnostic tool for the evaluation and management of lung disorders. Pulmonary function testing carried out using a Spirometer provides vital information about the functional status of the respiratory system. In this study, a Spirometer based on a fiber Bragg grating (FBG) sensor for PFT has been proposed. The proposed fiber Bragg grating Spirometer (FBGS) is a novel, noninvasive device that has the ability to convert the rate of air flow into strain variations using an FBG sensor bonded on a cantilever. The FBGS dynamically acquires in real time, the complete breath sequence comprising of inhalation phase, pause phase, and exhalation phase, in terms of the air flow rate along with the time duration of each phase. Fundamental pulmonary parameters such as forced vital capacity (FVC), forced expiratory volume in the first second (FEV1), the FEV1/FVC ratio, and peak expiratory flow are evaluated from the data obtained from the FBGS, which will aid greatly during clinical tests. The results from the FBGS developed are compared with a standard hospital grade pneumotachograph-based Spirometer for a sample size of 16 subjects to prove the efficacy of the proposed device.