The pulmonary function test (PFT) induction jacket was invented to make the process of performing the forced vital capacity (FVC) manoeuvre with a computerized spirometer effortless and productive for both the patient and the medical practitioner. The jacket is composed of three layers of PVC material sealed together to form a single jacket with two chambers. The inner chamber is formed between the inner layer and the middle layer, in which cold water at a temperature of 10 °C is circulated using a connected water unit when triggered. Similarly, the outer chamber is formed between the middle layer and the outer layer, in which air is pressurized using a connected air unit. Thirty volunteers performed the FVC manoeuvre with and without wearing the jacket. There was no difference between the results in spirometry parameters in the participants without a jacket and those with a jacket. However, use of the jacket significantly reduced the number of trials the participants had to undergo to perform spirometry. The jacket automated the FVC manoeuvre by triggering a physiological inspiratory gasp using cold water and circumscribing pressurized air for expiration. Additionally, subsequent advancements in the jacket have been suggested.

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The pulmonary function test (PFT) induction jacket was invented to make the process of performing the forced vital capacity (FVC) manoeuvre with a computerized spirometer effortless and productive for both the patient and the medical practitioner. The jacket is composed of three layers of PVC material sealed together to form a single jacket with two chambers. The inner chamber is formed between the inner layer and the middle layer, in which cold water at a temperature of 10 °C is circulated using a connected water unit when triggered. Similarly, the outer chamber is formed between the middle layer and the outer layer, in which air is pressurized using a connected air unit. Thirty volunteers performed the FVC manoeuvre with and without wearing the jacket. There was no difference between the results in spirometry parameters in the participants without a jacket and those with a jacket. However, use of the jacket significantly reduced the number of trials the participants had to undergo to successfully perform spirometry. The jacket has automated the FVC manoeuvre by triggering a physiological inspiratory gasp using cold water and circumscribing pressurised air for expiration. Additionally, subsequent advancements in the jacket have been suggested.

Background- Over the last few years, the prevalence of lung function abnormalities has led to several mass testing programs across the world. PFT induction jacket has been invented as a small step towards making the process of performing FVC maneuver effortless and productive for both the patients and the medical practitioner.Method- The jacket is made up of a three-layered PVC sheet sealed together to form a single jacket with two chambers. The inner chamber is formed between an inner layer and middle layer, in which, when triggered cold water of 10 degree is circulated using connected water unit. Like ways, an outer chamber where air is pressurised using connected air unit is formed between middle layer and outer layer. Thirty volunteers performed FVC maneuver with and without wearing jacket.Results- There was no difference between the results in spirometry parameters ‘without jacket’ and ‘with jacket’. However, Median ± IQR (Q3-Q1) for the number of trials, which a participant had to undergo to perform spirometry was 3 ± 2 (4-2) (without jacket) and 1 ± 1 (2-1) (with jacket) and this difference was statistically significant (Wilcoxon signed rank test z = 4.129, p < 0.0001), which shows the jacket’s usefulness in performing FVC maneuver. Conclusion- PFT induction jacket has automated the FVC maneuver of computerized Spirometer by triggering physiological inspiratory gasp using cold water and circumscribing pressurised air for expiration. Induction jacket makes the maneuver easy to perform, time efficient and effortless for the patient.

Background- Over the last few years, the prevalence of lung function abnormalities has led to several mass testing programs across the world. PFT induction jacket has been invented as a small step towards making the process of performing FVC maneuver effortless and productive for both the patients and the medical practitioner. Method- The jacket is made up of a three-layered PVC sheet sealed together to form a single jacket with two chambers. The inner chamber is formed between an inner layer and middle layer, in which, when triggered cold water of 10 degree is circulated using connected water unit. Like ways, an outer chamber where air is pressurised using connected air unit is formed between middle layer and outer layer. Thirty volunteers performed FVC maneuver with and without wearing jacket. Results- There was no difference between the results in spirometry parameters ‘without jacket’ and ‘with jacket’. However, Median ± IQR (Q3-Q1) for the number of trials, which a participant had to undergo to perform spirometry was 3 ± 2 (4 − 2) (without jacket) and 1 ± 1 (2 − 1) (with jacket) and this difference was statistically significant (Wilcoxon signed rank test z = 4.129, p < 0.0001), which shows the jacket’s usefulness in performing FVC maneuver. Conclusion- PFT induction jacket has automated the FVC maneuver of computerized Spirometer by triggering physiological inspiratory gasp using cold water and circumscribing pressurised air for expiration. Induction jacket makes the maneuver easy to perform, time efficient and effortless for the patient.