| 摘要 |
The compressed gas cylinder (1) is suitable for use in delivering medical gas therapy to ambulatory patients. The compressed gas cylinder (1) has a hollow main body (2) in which therapeutic gas is stored under pressure; a cylinder head (3); a gas outlet (4); and a display (6). The display (6) provides estimates of the time remaining before full depletion of the gas within the cylinder (1). Estimates of the time remaining are based upon estimates of the amount of gas remaining in the gas cylinder (1). However, temperature variation and fluctuations in actual measurements can cause substantial errors when estimating the amount of gas remaining. The improved gas cylinder (1) reduces these errors by calculating time remaining based upon two values for the amount of gas remaining that differ by at least a predetermined minimum. |
