Science Gossip . nd the thickness of the overlying tissues,radiographs of renal calculi are less satisfactory. In the spine also foreign bodies have been detectedand removed. A case in point was reported fromNew York, where a revolver bullet struck the thyroidcartilage and, after passing through the neck, lodged ing any pain, and it will generally reveal a foreignsubstance, if such is there, or the condition of thefractured bone. If however lead lotion or iodoformhas been used in the bandages, the latter will haveto be removed, as the former are impervious to therays. In cases where a fracture
Science Gossip . nd the thickness of the overlying tissues,radiographs of renal calculi are less satisfactory. In the spine also foreign bodies have been detectedand removed. A case in point was reported fromNew York, where a revolver bullet struck the thyroidcartilage and, after passing through the neck, lodged ing any pain, and it will generally reveal a foreignsubstance, if such is there, or the condition of thefractured bone. If however lead lotion or iodoformhas been used in the bandages, the latter will haveto be removed, as the former are impervious to therays. In cases where a fracture is attended withrapid swelling, X-Ray observations are particularlyuseful. Instances of these are fractures about theelbow or of the patella, or knee-cap. These, unlessseen at once, are often impossible to examine forseveral days by ordinary methods. It may almost besaid that under these circumstances a radiogram ofthe swollen part is absolutely the only means ofexact diagnosis at the command of the surgeon. For. Fig. 23. Fracture of Left Collar-bone. in an unknown part. A radiogram showed a darkspot in the fourth cervical vertebra, and with theknowledge thus gained the surgeon was enabled tooperate successfully. The ball had struck the hardlamina of the vertebra and flattened out, after whichit had barely penetrated the canal. It is perhaps the surgeon who has derived thegreatest benefit from the application of the have been invaluable in surgery in the detec-tion and examination of fractures of the various bonesabout the body. Very frequently the condition ofthe patient is such as to render it impossible for thesurgeon to make any ordinary investigation, whereasa radiograph can immediately be taken without caus-instance, the damage may be of such a kind as to demand prompt excision. At any rate, the radiogramwill indicate what form the fracture has 23 and 24 show some very interestingcases of fractures. The first of these is the radio-graph of a tho
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