Chap. 2. Of the Stone in the Bladder.
ALthough we should speak of these Diseases of the Reins in order, yet because the Stone in the Kidneys and Bladder a••e of the same Nature, and what hath been said of the one, may agree with the other, we shal speak next of the Stone in the Bladder.
The Material and Efficient Cause is the same of both: only this Difference there is; That Chil∣dren are most subject to the Stone in the Bladder, and Men to that in the Kidneys. The Reason of which, is given by Galen, 6. Epid. Sect. 3. because thickness of Urine, which Children often have by Reason of their gluttony, is dissolved by their gentle heat; neither doth it stay in the Reins by the help of the Expulsive Faculty of the Reins, which is stronger in that age; but being fallen into the Bladder, there it staies longer, because children given to play and sleep, piss more seldom. More∣over, their Urine is not so sharp, neither doth it provoke the expulsive faculty of the Bladder, while the quantity is burdensom, and so the dregs remain because the Passage is very narrow; besides, the bladder being stretched by the plenty of Urine cannot so exactly contract it self to empty out all the Urine, but some remains in the bottom, which is thick, and fit to breed the Stone. On the contrary, old men do often piss forth that Matter which is in the bladder, and their passage is larger; but the thick humor remains in the Reins, because it is clammy, and cannot be dissolved by their weak heat, or strain through by reason of its dryness. Hence Hippocrates in Coacis, saith that the Stone in the bladder is not bred after fourteen yeers of age, to three score, except it was there before.
Fernelius mentioned a new Opinion of the Stone, breeding in the Bladder, saying, That every stone in the bladder, had its beginning from the Kidneys, and grows afterwards in the bladder: For when in a fit of the stone, it fals from the Reins, if it be great, it staies in the Bladder, and by getting new Matter it encreaseth by degrees. For he affirmeth that in grinding of some stones taken out of the Bladder, he found as it were a Kernel which fel from the Reins of another color and substance, and that he never knew any that had a stone in the bladder, who was not formerly vexed with pains in the Reins. But this Opinion is cast off by divers very good Authors, who by their Experience have found the contrary, and have taken many stones from the bladders of children, which have been wholly of the same color and substance within. And common Experience teacheth us, that Chil∣dren have the Stone in the Bladder, who never had pain in the Reins, which would be otherwise if the stone came first from the Reins. It is true, that in men many times stones fall from the Kidneys into the Bladder, and encrease by the addition of new Matter; but we deny that it is alwaies so, and we constantly affirm, that many stones have taken their beginning in the bladder.
The knowledg of the stone in the bladder is difficult, especially in the beginning, when it is little; but when it is great it is evident. But we shall discover it as much as we can by Art.
The First Sign is, pain in the neck of the bladder, which is worse towards the end of pissing, and reacheth to the end of the Yard, like that which is in difficulty of Urine from Inflamation, called Dysuria, and it is scarcely at first distinguished from it, but when other signs appear.