In 1941, the author proposed a mean of radiological classification of pulmonary tuberculosis in 5 digit codes, and 10 digit code classification in 1953. We also proposed a classification of pulmonary tuberculosis in 5 digit code togetherwith a few statistics in 1943. Lately, we were reported with the classification of pulmonary tuberculosis in 4 digit code (J. Holm, Denmark & H. E. Hillebooe, USA, 1946) which is similar to our idea, but their details differ from each other. The author presents in the following his method:
I. Decimal radiological classification of pulmonary tuberculosis (DX)
1) The 1st and 2nd digit are of principal classification (Type on TB) (Table 1)
2) The 3rd digit is of extent of lesion (Table 2)
3) The 4th digit is of situation of principal lesion (Table 3)
4) The 5th and 6th digits are of state of pleura, or operation.
5) The 7th and 8th digits are of pleura of opposite lung.
6) The 9th digit is of situation of lesion.
7) The 10th digit is of character of lesion (homogenious, nodular, indulative) Example: DXL 834753. 7315 (left: thoracoplasty; right; pneumothorax)
II. Decimal case classification of pulmonary tuberculosis (DK)
1) FK: 1st digit is of fever (maximal temperature and type by month) (Table 4)
2) GK: 2nd digit is of nutrition (hight and weight)
3) RK: 3rd digit is of erytrocyte sedimentation rate (mean value)
4) SK: 4th digit is of spcitum (number and tubercule bacilli) (Table 5)
5) XK: 5th digit is of x-ray findings (extent of lesion and cavity: 3rd digit of DX) (Table 2) Each symbol is classified into 10 degrees. K is the mean value of 5 digits Calculation: addition (
s) reduction (
r) 0≤Ki≤10 Example: DK 24' 23. 6=3.2 Clinical course (Q) Ka: beginning, Kg: end, k=Ka-Ke, Q=k/Ka×100, (Q=-k/(10-k)x100)
III. Practical applications:
1) memorandum (DX, DK)
2) determination of clinical status (K)
3) determination of clinical course (Q)
4) determination of the effects of treatments (Q) Marking method (P): if cases are plenty, mean Q=mean P
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