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Updated: May 27, 2025
In some cases the bone becomes enlarged, with pain and tenderness on pressure; in others there are the usual phenomena which attend suppuration, but the pus is slow in coming to the surface, and the constitutional symptoms are slight. The pus may escape by new channels, or one of the old sinuses may re-open.
As it was, Peter so Uncle Moses called the Sweep was for one moment defenceless, being preoccupied in seizing his opponent by the ankles; and although his cranium had no sinuses, and was so thick it could crush a quart-pot like an opera-hat, it did not court a fourth double concussion, and this time he was destined to disappoint his backers.
Each valve usually consists of two semilunar flaps attached to opposite sides of the vessel wall, each flap having a small sinus on its cardiac side. The distension of these sinuses with blood closes the valve and prevents regurgitation.
That this conclusion may be drawn from the existence of large frontal sinuses, and a prominence of the lower frontal region, is confirmed in many ways by other observations.
Where there are one or more sinuses, the passage of a probe which strikes bare bone affords corroboration of the view that the bone has perished. When the dead bone has been separated from the living, the X-rays yield the most exact information.
There is a great amount of pus being discharged from the large sinus on the back, not so much from the small one. Patient had a chill last night. After the usual washing out of the sinuses with the carbolic solution, I inject both of them in with liquid vasaline. This I do, a well as the washing out, by means of a No. 10 catheter, attached to the end of a Davidson's syringe.
But as there are actually more animals which have no lungs than there are furnished with them, and in like manner a greater number which have only one ventricle than there are with two, it is open to us to conclude, judging from the mass or multitude of living creatures, that for the major part, and generally, there is an open way by which the blood is transmitted from the veins through the sinuses or cavities of the heart into the arteries.
The reason is, that with a somewhat greater than usual resistance offered to the transit of the blood by the bandage, coupled with the weaker action of the heart, and its diminished impelling power, the stream cannot make its way under the ligature; and farther, owing to the weak and languishing state of the heart, the blood is not transferred in such quantity as wont from the veins to the arteries through the sinuses of that organ.
And I was the more inclined to suspect this, as, in ordinary human skulls, the occipital protuberance and superior semicircular curved line on the exterior of the occiput correspond pretty closely with the 'lateral sinuses' and the line of attachment of the tentorium internally.
Halsted reports the history of a boy of seventeen, who, while out fowling, had the breech-pin of a shot-gun blown out, the sharp point striking the forehead in the frontal suture, crushing the os frontis, destroying 1 3/4 inches of the longitudinal sinus, and causing severe hemorrhage from both the longitudinal and frontal sinuses.
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