Final answer:
Accurate statements regarding flow-sensing spirometers include that corrections are needed for gas compositions, flow transducers may be heated, and nonlinearity is corrected electronically or by software.
Step-by-step explanation:
Flow-sensing spirometers are medical devices used to assess lung function by measuring the flow of air inhaled and exhaled by the respiratory system. Among the statements provided, the following are accurate regarding flow-sensing spirometers:
Corrections must be made for different gas compositions because the density and viscosity of the gas can affect the measurement.
The flow transducer may be heated to prevent the condensation of water vapor, which could interfere with the flow measurement.
Nonlinearity, which refers to the deviation of the spirometer's response from a direct proportionality to flow, is corrected electronically or by software.
While it is important to account for water vapor in gas measurements, modern spirometers often use electronic condensation prevention methods rather than chemical absorbers.