Though bleeding ought not to be performed in a state of crudity, yet even that does not hold always. For the circumstances will not at all times wait for concoction. So that if any person has fallen front a height, or has received a contusion, or vomits blood from some sudden accident, although he has taken food a little before, yet that evacuation is proper, lest if the matter settle, it distress the body. The same rule will hold in other sudden cases too, where there is a danger of suffocation. But if the nature of the distemper will allow a delay, it must not be done, till all remaining suspicion of crudity is removed. Upon this account, the second or third day of an illness seems most proper for this operation. But as sometimes it is necessary to bleed even on the first day, so it is never good after the fourth, when by time alone, the matter is either dissipated, or has corrupted the body; so that the evacuation may weaken, but cannot make it sound. But when a vehement fever prevails, to bleed in the time of its violence is killing the patient. Therefore an intermission[(17)] is to be awaited for: if it does not intermit, when it has ceased to increase: if there be no hopes even of a remission, in that case the only opportunity offered, though less favourable, is not to be neglected.
Further this remedy, where it is necessary, generally were best to be divided into two days; for it is better at the first to lighten the patient, and after that to cleanse him thoroughly, than to run any risk of his life by dissipating all his strength at once. And if this method be found to answer in the cure of a dropsy, how much more must it of necessity answer with regard to the blood?
If the disorder be in the whole body, the evacuation ought to be made from the arm: if in any particular place, from the part affected, or at least as near to it as may be; because it cannot be performed every where, but only in the temples, and in the arms, and near the ancles. I am not ignorant, that it is the opinion of some, that blood should be let at the greatest distance from the part where it does harm; for that thus the course of the matter is diverted; but in the other way it is drawn into that very place, which is distressed. But this is altogether false. For it first empties the part nearest: and the blood flows from the more remote, as long as the evacuation is continued: when this is stopt, because there is no more attraction, it then ceases to come. Yet experience itself seems to have shewn, that in a fracture of the skull blood is to be let rather from the arm: and if the disorder is in one arm, it must be performed in the other: I suppose for this reason, because if any miscarriage should happen, those parts, which are already hurt[(18)], are more exposed to injuries. Sometimes also an hæmorrhage breaking out in one part, is stopt by bleeding in another. For it ceases to flow, where we would not have it, when we apply what will stop its course there, and open another passage for it.
Altho’ bleeding is very easy to one, who has experience; yet it is very difficult to one, that is ignorant. For the vein lies close to the arteries; and to these the nerves. So that if the lancet has touched a nerve, a convulsion will follow, which destroys a man miserably. And then a wounded artery neither unites again, nor heals; and sometimes it occasions a violent hæmorrhage. If also the vein itself happens to be cut quite through, the two ends are compressed, and discharge no blood. Again, if the lancet is entered with fear, it lacerates the surface of the skin, and does not open the vein. Sometimes too the vein lies concealed, and is not easily found. Thus many circumstances make that difficult to an ignorant person, which is very easy to the skilful.
The vein is to be cut at the middle. And when the blood flows from it, its colour and consistence ought to be observed. For if it be thick and black, it is bad; and therefore the discharge is useful: if red and pellucid, it is sound; and that evacuation is so far from being beneficial, that it may even hurt, and is immediately to be stopt. But such an accident cannot happen to the physician, who knows in what case bleeding is to be used. It more commonly happens, that it flows on the first day equally black thro’ the operation. And altho’ it be so, yet if the discharge is sufficient, it must be stopt: and an end must always be put to it, before the person faints.
Then the arm is to be bound up, putting upon it a penecillum[(19)] dipt in cold water, and squeezed; and on the following day, the vein must be rubbed with the middle finger, that its recent union may be resolved, and it may again discharge blood. Whether it happens on the first or second day, that the blood, which at first flowed thick, and black, has begun to appear red and pellucid, there is then a sufficient quantity taken away, and what remains is pure: so that the arm is to be immediately bound up, and kept so, till the cicatrice is firm; which firmness it very soon acquires in a vein.
CHAP. XI. OF CUPPING.
There are two sorts of cucurbitals: the one of copper, the other of horn. That of copper is open at the one end, and close at the other; that of horn is likewise open at one end, and at the other has a small hole. Into the copper one burning linen is put, and its mouth is clapt close to the body, and is prest down, till it adhere to it. The horn kind is only applied to the body, and after that, when a person has sucked out the air by the small hole, and that is closed with wax, it sticks, as well as the other. Both of these are made not only of these two materials, but of any thing else. Where no better can be got, a small cup with a narrow mouth is fit enough for the purpose. When it adheres, if the skin has been cut before with a scalpel, it will bring out blood: if the skin is whole, air. Wherefore when the offence is from matter contained within, the first method is to be pursued: when it is only a flatulency, the other is commonly used.
Now the principal use of a cucurbital is, when a disorder is not in the whole body, but only in a part, the emptying of which is sufficient to render it sound. And this very thing is a proof, that in the cure of any member, bleeding by a lancet too is to be performed rather in the part which is already hurt: because no body puts the cucurbital upon a different part, unless to divert the flux of blood thither, but on that, which is diseased, and which is to be relieved.
There may possibly be a necessity for using the cucurbital in chronic distempers (although they be already of some standing) if there be either corrupted matter, or a flatulency. Likewise in some acute distempers, if at the same time the body requires to be lightened, and the strength will not admit of bleeding from a vein. And this remedy, as it is less violent, so it is more safe; and is never dangerous, though it be made use of in the greatest violence of a fever, or even in the time of crudity. For this reason, when there is a necessity for bleeding, if the opening of a vein is very dangerous, or the disorder is fix’d in a noble part of the body, we must also have recourse to this instrument. We must be sensible however, that as it is attended with no danger, so it gives a feebler aid; and that is not possible to relieve a violent distemper, but by an equally violent remedy.