PRODUCT / INTERNAL TO LATTICE
Shwaas is a Bluetooth-enabled spirometer that brings together the ease of use of a handheld spirometer with the data logging capabilities of an Android smartphone.
Shwaas is palm-sized device with a built-in LCD display for immediate access to test data.
Flow and volume related parameters are measured and transmitted to any Android smartphone via a built-in Bluetooth module. The Shwaas app allows data download in PDF and CSV (excel-readable) formats.
The device measures exhaled (expiratory) air flow using a rotary turbine. The number of rotations of the turbine is proportional to the volume of air, and the frequency of rotation is proportional to the flow rate. Based on these principles, infrared (IR) sensors are used to translate movement of the turbines to flow rate and air volume.
Shwaas assesses all major flow and volume related respiratory parameters, as described below.
FVC: Forced Vital Capacity
The volume of air that can forcibly be blown out after full inspiration.
FEV1: Forced Expiratory Volume
The volume of air that can forcibly be blown out in one second after full inspiration.
The ratio of FEV1 to FVC, expressed in percentage.
PEF: Peak Expiratory Flow
The maxima on flow-volume curve, i.e. the highest flow rate.
FEF25: Forced Expiratory Flow
Flow rate at 25% of vital capacity (FEV).
FEF75: Forced Expiratory Flow
Flow rate at 75% of vital capacity (FEV).
The average flow rate between 25% and 75% of the vital capacity.