Studies; Reprints Volume 26 (Paperback)

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1917 edition. Excerpt: ...57.0 45.0 37.0 Calculated .."............. 113.0 96.8 81.6 67.9 55.9 45.5 36.6 Mu. 9 13 17 21 25 29 Apr. 2 Observed area...................... 27.5 23.9 17.6 14.0 11.8 9.2 5.9 Calculated .."..................... 29.2 23.1 18.1 14.0 10.8 8.26 6.27 Api-.6 10 14 18 22 26 30 May4 6 ' Observed area........ 4.1 3.0 1 7 1.8 10 0.65 0.7 Cicatrization. Calculated .."...... 4.7 3.5 2 6 1.9 14 1.0 0.7 0.5 " As shown by the above experiments, 0 of the formula, that is, the theoretical healing, corresponds to an area of about 0.4 sq. cm. This is required by the fact that if the calculation should be continued, 0 would be reduced to infinity. Experience has proved that the calculated number 0.4 nearly always represents complete healing of the wound. The value of the index varies between 0.02 and 0.08. It depends on the age of the patient and the size of the wound, and is much larger when the wound is smaller and the subject younger. In conclusion, it may be stated, that, under given conditions of asepsis and dressing, the area cicatrized in a day is directly proportional to the size of the wound, to the square root of its age, and to the relation between the rate of cicatrization and the square root of the age of the wound at the time of observation. The relation between the rate expressed in function of the total area, and the square root of the age of the wound is represented by the cicatrization index i, which acts in Formula 2 as a constant characterizing each wound. Mechanism of the Formula. The study of a wound in the process of healing shows that the age of the wound seems to have no action whatever on the rate of cicatrization. On the other hand, since all wounds under a certain size cicatrize at about equal rate, the...