Tuberc Respir Dis.  2007 Apr;62(4):276-283. 10.4046/trd.2007.62.4.276.

Clinical Value of a Desktop Spirometer (HI-801) for Spirometry Screening

• Choi HS
• Choi CW
• Park MJ
• Kang HM
• Yoo JH

• KMID: 1970227
• DOI: http://doi.org/10.4046/trd.2007.62.4.276

Abstract

BACKGROUND: A national health care initiative recommends routine spirometry screening of all smokers over age 45 or patients with respiratory symptoms. In response to the recommendation, new, simple, and inexpensive desktop spirometers for the purpose of promoting widespread spirometric screening were marketed. The performance of these spirometers was evaluated in vivo testing with healthy subjects. However, the clinical setting allows spirometric assessment of various pathologic combinations of flow and volume.
OBJECTIVE
The aim of this study was to compare the accuracy of a desktop spirometer to a standard laboratory spirometer, in a clinical setting with?pathologic pulmonary function. METHOD: In a health check-up center, where screening pulmonary funct test was performed using the HI-801 spirometer. Subjects who revealed the ventilation defect in screening spirometry, performed the spirometry again using the?standard Vmax spectra 22d spirometer in a tertiary care hospital pulmonary function laboratory. Pulmonary function test with both spirometer was performed according to the guidelines of the American Thoracic Society.
RESULTS
109 patients were enrolled. Pulmonary function measurements (FVC, FEV1, PEFR, FEF25%-75%) from the HI-801 correlated closely (r=0.94, 0.93, 0.81, 0.84, respectively) with those performed with the Vmax spectra 22d?and showed the good limits of agreement and differences between the 2 devices; FVC +0.35 L, FEV1 +0.16 L, PEFR +1.85 L/s, FEF25%-75% -0.13 L/s. With the exception of FEV1, FEF25%-75%, these differences were significant(p<0.05) but small.
Conclusion
The HI-801 spirometer is comparable to the standard laboratory spirometer, Vmax spectra 22d, with high accurary for FEV1 and FVC and?acceptable differences for clinical use.

Keyword

Screening; Spirometry; Desktop spirometer; Laboratory spirometer

MeSH Terms

Delivery of Health Care
Humans
Mass Screening*
Peak Expiratory Flow Rate
Respiratory Function Tests
Spirometry*
Tertiary Healthcare
Ventilation

Figure

• 

  Figure 1 Bivariate correlation analysis between lung function measurements made with the HI-801 and Vmax spirometer. (A) FVC, (B) FEV1, (C) FEF25%-75%, (D) PEFR. FEV1: forced expiratory volume in 1 second; FVC: forced vital capacity; PEFR: peak expiratory flow rate; FEF25%-75%: forced expiratory flow at 50% of the forced vital capacity. (p<0.01 for all comparisons).

• 

  Figure 2 Differences versus mean values for lung function measurements made with HI-801 and Vmax 22d spirometers. The solid lines represent the mean differences. The dotted lines represent the upper and lower limits of agreement (±1.96SD) (In Bland Altman plot). FEV1: forced expiratory volume in 1 second; FVC: forced vital capacity; PEFR: peak expiratory flow rate; FEF25%-75%: forced expiratory flow at 50% of the forced vital capacity.

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