Abstract
The laser flowmeter is a device for observing histo-blood flow bloodlessly as well as continuously. This device was well known for measuring gingival and pulpal blood flow in the dental field. The laser Doppler flowmeter was widely used for this device. Therefore, in this study two methods were applied at the same time in order to compare the effectiveness of the laser flowmeter; the first method was the laser Doppler flowmeter (back-scattered laser type) and the transmitted laser flowmeter which was developed for reducing noise; the other was the simple sphygmograph and the former electrocardiograph. The following results were obtained;
1. The corresponding blood waveform was observed in the pulpal blood flow, the pulse, and the construction. The sphygmograph was useful for substitution of the electrocardiograph.
2. The transmitted laser flowmeter had less influence on noise than the laser Doppler flowmeter.
3. The laser flowmeter was practicable to measure abnormal pulp objectively.
