File:Interstate medical journal (1917) (14597105848).jpg

Identifier: interstatemedica2419unse (find matches)
Title: Interstate medical journal
Year: 1917 (1910s)
Authors:
Subjects: Medicine
Publisher: St. Louis, : Interstate Medical Journal
Contributing Library: The College of Physicians of Philadelphia Historical Medical Library
Digitizing Sponsor: The College of Physicians of Philadelphia and the National Endowment for the Humanities

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eding from the soft parts was carefullycontrolled. Without any handling of the periosteum the shaft ofthe bone could be sufficiently exposed for section. Together with itsundisturbed periosteum the bone was divided transversely by asingle cut of a sharp heavy scissors. The soft parts and skin werecarefully sutured in layers. Twenty-four experiments were per- Neuhof: Sunlight and Repair of Fractures 739 formed. Reports will be limited to those in which primary unionoccurred and the animals were in excellent condition and not preg-nant at the conclusion of the experiments.2 Changes in weight wereinsignificant; in most instances there was a slight increase. Nodifference either in weight or in general condition was discerniblebetween the sunlight and the no sunlight rabbits. There wasno recognizable difference in the healing of the incised soft parts.Therefore, my observations will be confined to the question of bonerepair. Differences in the repair of the fractures were estimated in sev-
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Pig.5.—Rabbit No. 3226. No sunlight. Fig. 6.—Rabbit No. 3230. Sunlight.Very small callus. No union. Very large callus. Good union. eral ways: X-ray examination, tests of the strength of union, in-spection of the gross specimens, and microscopic examination. Byall these means, but especially by the last, definite differences wereobserved. In almost every instance fracture-healing in the sun-light rabbits was far more active and vigorous than in the nosunlight animals. X-ray examinations showed greater broadeningand tufting of the fractured ends, and earlier and more active callusformation. The radiographic evidence was supported by inspection 2The differences in repair to be noted between the sunlight and no sunlightexperiments were paralleled in the animals whose general condition became pooror whose wounds were infected. The latter are excluded from consideration be-cause conclusions can manifestly not be drawn from them. 740 INTERSTATE MEDICAL JOURNAL of the isolated specimens;

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