Abstract
The planning of a hospital must be done based on the analysis of routine works in clinical laboratories. During the period from Dec. 1954 to July 1955, the author took out 1,400 patients as random samples from about 3,200 patients in five public T.B. hospitals, and investigated how many times on an average a patient sit for clinical examinations in one month and what kinds of examinations were most frequently carried out. The conclusions are; (1) The examinations most frequently taken are fluoroscopy, X-ray photo, microscopy and culture of sputum, haematology and respiration test. (2) The number of times of bacteriological examination is over 200 times in a month per 100 beds, and X-ray tests and respiration tests are repeated 100 times for each in a month per 100 beds. (3) The number of times of examinations for the patients just before operation is far more frequent than that for general patients or post-operative patients.