Establishment of normative data for maximal inspiratory pressure by using capsule-sensing pressure gauge device in healthy individuals -A pilot study

Abstract

Study Design: A Cross-sectional study.

Background: Work of respiratory system is done by diaphragm which is the core muscle for inspiration. To know its strength, the measurement is done by suction device or negative pressure gauge in inspiration with help of closed valve at mouth. Maximal inspiratory pressure (MIP) is the prevalent method used in clinical practice to evaluate the inspiratory muscles strength.The negative pressure gauge device is newly invented device that measures respiratory muscle strength, as is easy to use, non in-vasive and light weight. Hence it is necessary to be aware of the normal values of inspiratory pressure by using CSPG devices in healthy individuals.

Objectives: To established a normal value of inspiratory pressure in healthy individuals for capsule sensing pressure gauge. To see the correlation between I.C and MIP.

Method: 207 normal healthy individuals were included in study. An instruction was given on CSPG device and readings of three trails were noted out of three, best value was observed for maximal inspiratory pressure.

Results: A normal value was form by grading system in percentile method for CSPG-D. Correlation between MIP and I.C in normal healthy individuals showed significant value, r= 0.483,p=<0.01.

Conclusion: The scoring system and normal value was described for capsule sensing pressure gauge device which showed 14.66 Kpa to 17.33Kpa shall be considered to normal value. Hence, the reference values for maximal inspiratory pressure indicate that the capsule sensing pressure gauge device is acceptable tool for assessing inspiratory muscle weakness in normal healthy individuals.