Intra- and inter-rater reliability of maximum inspiratory pressure measured using a portable capsule-sensing pressure gauge device in healthy adults

Nikita S Jalan, Sonam S Daftari, Seemi S Retharekar, Savita A Rairikar, Ashok M Shyam, Parag K Sancheti, Nikita S Jalan, Sonam S Daftari, Seemi S Retharekar, Savita A Rairikar, Ashok M Shyam, Parag K Sancheti

Abstract

Background: Measurement of maximum inspiratory pressure is the most prevalent method used in clinical practice to assess the strength of the inspiratory muscles. Although there are many devices available for the assessment of inspiratory muscle strength, there is a dearth of literature describing the reliability of devices that can be used in clinical patient assessment. The capsule-sensing pressure gauge (CSPG-V) is a new tool that measures the strength of inspiratory muscles; it is easy to use, noninvasive, inexpensive and lightweight.

Objective: To test the intra- and inter-rater reliability of a CSPG-V device in healthy adults.

Methods: A cross-sectional study involving 80 adult subjects with a mean (± SD) age of 22±3 years was performed. Using simple randomization, 40 individuals (20 male, 20 female) were used for intrarater and 40 (20 male, 20 female) were used for inter-rater reliability testing of the CSPG-V device. The subjects performed three inspiratory efforts, which were sustained for at least 3 s; the best of the three readings was used for intra- and inter-rater comparison. The intra- and inter-rater reliability were calculated using intraclass correlation coefficients (ICCs).

Results: The intrarater reliability ICC was 0.962 and the inter-rater reliability ICC was 0.922.

Conclusion: Results of the present study suggest that maximum inspiratory pressure measured using a CSPG-V device has excellent intraand inter-rater reliability, and can be used as a diagnostic and prognostic tool in patients with respiratory muscle impairment.

Keywords: Inter-rater reliability; Intrarater reliability; MIP; Maximal inspiratory pressure; Noninvasive device for maximum inspiratory pressure measurement.

Figures

Figure 1)
Figure 1)
Capsule-sensing pressure gauge (Gauges Bourdon [I] Pvt Ltd, India)
Figure 2)
Figure 2)
Plot depicting the mean maximum inspiratory pressure (82.821±32.763 cmH2O) for group A1 in intrarater reliability testing. Best of A1 refers to the best of the three measured maximum inspiratory pressures
Figure 3)
Figure 3)
Plot depicting the mean maximum inspiratory pressure (82.436±32.785 cmH2O) for group A2 in intrarater reliability testing. Best of A2 refers to the best of the three measured maximum inspiratory pressures
Figure 4)
Figure 4)
Plot depicting the mean maximum inspiratory pressure (74.487±24.916 cmH2O) for rater 1 in inter-rater reliability testing
Figure 5)
Figure 5)
Plot depicting the mean maximum inspiratory pressure (72.949±22.441 cmH2O) for rater 2 in inter-rater reliability testing

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Source: PubMed

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