Automatic Detection Algorithm for Residual Quantity of Ringer's Solution

摘要

When a patient is under the conditions of injecting ringer's solution, a nurse must carefully check the residual quantity of the ringer's solution because if the nurse misses the exact time to change the ringer's solution, sometimes dangerous moments can be occurs, such as influx of air bubbles could enter blood vessels or the blood could be regurgitated into the ringer. Therefore, it is necessary to develop a method to detect automatically residual quantity of the ringer's solution. This paper proposes a detection algorithm that can detect the residual quantity of the ringer's solution automatically. This algorithm utilized a CCD camera that was applied as a sensor to detect the residual level of the ringer's solution. Our algorithm used the concept of the roundness rate for the residual quantity of the ringer's solution. The proposed algorithm shows very effective to detect complex background, and thus, automatically detection of the residual quantity of the ringer's solution was possible with 95% accurate.