3. Great apparent weakness. This, in acute and violent fevers, is always

from a depressed state of the system. It resembles, in so many

particulars, that weakness which is the effect of the abstraction of

stimulus, that it is no wonder they have been confounded by physicians.

This sameness of symptoms from opposite states of the system is taken

notice of by Hippocrates. He describes convulsions, and particularly a

hiccup, as occurring equally from repletion and inanition, which answer

to the terms of depression, and debility from action and abstraction. The

natural remedy for the former is depletion, and no mode of depleting is

so effectual or safe as blood-letting. But the great objection to this

remedy is, when a fever of great morbid excitement affects persons of

delicate constitutions, and such as have long been subject to debility of

the chronic kind. In this state of the system there is the same morbid

and preternatural action in the blood-vessels, that there is in persons

of robust habits, and the same remedy is necessary to subdue it in both

cases. It is sometimes indicated in a larger quantity in weakly than in

robust people, by the plethora which is more easily induced in their

relaxed and yielding blood-vessels, and by the greater facility with

which ruptures and effusions take place in their viscera. Thus it is more

necessary to throw overboard a large part of the cargo of an old and

leaky vessel in a storm, than of a new and strong one. I know that

vomits, purges, sweats, and other evacuating remedies, are preferred to

bleeding in weakly constitutions, but I hope to show hereafter, that

bleeding is not only more effectual, but more safe in such habits, than

any other depleting remedy.

4. Infancy and childhood. This is so far from being an objection to

bleeding, that the excitable state of the blood-vessels in those periods

of life, renders it peculiarly necessary in their inflammatory diseases.

Dr. Sydenham bled children in the hooping cough, and in dentition. I have

followed his practice, and bled as freely in the violent states of fever

in infancy as in middle life. I bled my eldest daughter when she was but

six weeks old, for convulsions brought on by an excessive dose of

laudanum given to her by her nurse; and I bled one of my sons twice,

before he was two months old, for an acute fever which fell upon his

lungs and bowels. In both cases, life appeared to be saved by this

remedy.

5. Old age. The increase of appetite in old people, their inability to

use sufficient exercise, whereby their blood-vessels become relaxed,

plethoric, and excitable, and above all, the translation of the strength

of the muscles to the arteries, and of plethora to the veins, all

indicate bleeding to be more necessary (in equal circumstances) in old,

than in middle aged people. My practice in the diseases of old people has

long been regulated by the above facts. I bled Mrs. Fullarton twice in a

pleurisy in January, 1804, in the 84th year of her age, and thereby cured

her disease. I am not the author of this practice. Botallus left a

testimony in favour of it nearly 200 years ago[50], and it has since been

confirmed by the experience of Hoffman, and many other physicians. An

ignorance of, or inattention to this change in the state of the

blood-vessels, in persons in the decline of life, and the neglect of the

only remedy indicated by it, is probably the reason why diseases often

prove fatal to them, which in early or middle life cured themselves, or

yielded to a single dose of physic, or a few ounces of bark.

[50] Magis esse adjuvandos senes, missione sanguinis dum morbus

postulat, aut corpus eorum habitus malus est, quam ubi hæc (quod

absonum videbitur) juvenibus contingunt.

De Cur. per Sang. missionem, cap. 11. § 11.

6. The time of menstruation. The uterus, during this period, is in an

inflamed state, and the whole system is plethoric and excitable, and of

course disposed to a violent degree of fever, from all the causes which

excite it. Bleeding, therefore, is more indicated, in fever of great

morbid action, at this time, than at any other. Formerly the natural

discharge from the uterus was trusted to, to remove a fever contracted

during the time of menstruation; but what relief can the discharge of

four or five ounces of blood from the uterus afford, in a fever which

requires the loss of 50, or perhaps of 100 ounces to cure it?

7. Pregnancy. The inflammation and distention induced upon the uterus

directly, and indirectly upon the whole system by pregnancy, render

bleeding, in the acute states of fever, more necessary than at other

times. I have elsewhere mentioned the advantages of bleeding pregnant

women, in the yellow fever. I did not learn the advantages of the

practice in that disease. I bled Mrs. Philler 11 times in seven days, in

a pleurisy during her pregnancy, in the month of March, 1783. Mrs. Fiss

was bled 13 times in the spring of 1783; and Mrs. Kirby 16 times in the

same condition, by my orders, in the winter of 1786, in a similar

disease. All these women recovered, and the children they carried during

their illness, are at this time alive, and in good health.

8. Fainting after bleeding. This symptom is accidental in many people. No

inference can be drawn from it against blood-letting. It often occurs

after the first and second bleedings in a fever, but in no subsequent

bleeding, though it be repeated a dozen times. Of this I saw several

instances, in the yellow fever of 1794. The pulse, during the fainting,

is often tense and full.

9. Coldness of the extremities, and of the whole body. This cold state of

fever when it occurs early, yields more readily to bleeding, than to the

most cordial medicines.

10. Sweats are supposed to forbid blood-letting. I have seen two

instances of death, from leaving a paroxysm of malignant fever to

terminate itself by sweating. Dr. Sydenham has taught a contrary practice

in the following case. "While this constitution (says the doctor)

prevailed, I was called to Dr. Morice, who then practised in London. He

had this fever, attended with profuse sweats, and numerous petechiæ. By

the consent of some other physicians, our joint friends, he was blooded,

and rose from his bed, his body being first wiped dry. He found

immediate relief from the use of a cooling diet and medicines, the

dangerous symptoms soon going off; and by continuing this method he

recovered in a few days[51]." In the same fever, the doctor adds further,

"For though one might expect great advantages in pursuing an indication

taken from what generally proves serviceable (viz. sweating), yet I have

found, by constant experience, that the patient not only finds no relief,

but, contrariwise, is more heated thereby; so that frequently a delirium,

petechiæ, and other very dangerous symptoms immediately succeed such

_sweats_[52]."

[51] Wallis's edition, vol. i. p. 210.

[52] Vol. i. p. 208.

Morgagni describes a malignant fever which prevailed in Italy, in which

the patients died in profuse sweats, while their physicians were looking

for a crisis from them. Bleeding would probably have checked these

sweats, and cured the fever.

11. Dissolved blood, and an absence of an inflammatory crust on its

crassamentum. I shall hereafter place dissolved blood at the highest

point of a scale, which is intended to mark the different degrees of

morbid action in the system. I have mentioned, in the Outlines of a

Theory of Fever, that it is the effect of a tendency to a palsy, induced

by the violent force of impression upon the blood-vessels. This

appearance of the blood in certain states of fever, instead of forbidding

bleeding, is the most vehement call of the system for it. Nor is the

absence of a crust on the crassamentum of the blood, a proof of the

absence of great morbid diathesis, or a signal to lay aside the lancet.

On the contrary, I shall show hereafter, that there are several

appearances of the blood which indicate more morbid action in the

blood-vessels than a sizy or inflammatory crust.

12. An undue proportion of serum to crassamentum in the blood. This

predominance of water in the blood has often checked sufficient

blood-letting. But it should be constantly disregarded while it is

attended with those states of pulse (to be mentioned hereafter) which

require bleeding.

14. The presence of petechiæ on the skin. These, I have elsewhere said,

are the effects of the gangrenous state of fever. Dr. Sydenham and Dr. de

Haen have taught the safety and advantage of bleeding, when these spots

are accompanied by an active pulse. A boy of Mr. John Carrol owes his

recovery from the small-pox to the loss of fifty ounces of blood, by five

bleedings, at a time when nearly every pock on his arms and legs had a

purple appearance. Louis XIV was bled five times in the small-pox, when

he was but thirteen years of age, and thereby probably saved from the

grave, to the great honour and emolument of the single physician who

urged it against the advice of all the other physicians of the court. Dr.

Cleghorn mentions a single case of the success of bleeding in the

petechial small-pox. His want of equal success afterwards, in similar

cases, was probably occasioned by his bleeding too sparingly, that is,

but three or four times.

Abscesses and sore breasts, which accompany or succeed fever, are no

objections to blood-letting, provided the pulse indicate the continuance

of inflammatory diathesis. They depend frequently upon the same state of

the system as livid effusions on the skin.

14. The long duration of fever. Inflammatory diathesis is often

protracted for many weeks, in the chronic state of fever. It, moreover,

frequently revives after having disappeared, from an accidental irritant

affecting some part of the body, particularly the lungs and brain. I bled

a young man of James Cameron, in the autumn of 1794, four times between

the 20th and 30th days of a chronic fever, in consequence of a pain in

the side, accompanied by a tense pulse, which suddenly came on after the

20th day of his disease. His blood was sizy. His pain and tense pulse

were subdued by the bleeding, and he recovered. I bled the late Dr. Prowl

twelve times, in a fever which continued thirty days, in the autumn of

the year 1800. I wish these cases to be attended to by young

practitioners. The pulmonary consumption is often the effect of a chronic

fever, terminating with fresh inflammatory symptoms, by effusions in the

lungs. It may easily be prevented by forgetting the number of the days of

our patient's fever, and treating the pulmonary affection as if it were a

recent complaint.

15. Tremors and slight convulsions in the limbs. Bark, wine, laudanum,

and musk are generally prescribed to remove these symptoms; but, to be

effectual, they should, in most cases, be preceded by the loss of a few

ounces of blood.

16. Bleeding is forbidden after the fifth or seventh day in a pleurisy.

This prohibition was introduced into medicine at a time when a fear was

entertained of arresting the progress of nature in preparing and

expelling morbific matter from the system. From repeated experience I can

assert, that bleeding is safe in every stage of pleurisy in which there

is pain, and a tense and oppressed pulse; and that it has, when used for

the first time after the fifth and seventh days, saved many lives.

Bleeding has likewise been limited to a certain number of ounces in

several states of fever. Were the force of the remote cause of a fever,

its degrees of violence, and the habits of the subject of it, always the

same, this rule would be a proper one; but, this not being the case, we

must be governed wholly by the condition of the system, manifested

chiefly by the state of the pulse. To admit of copious bleeding in one

state of fever, and not in another, under equal circumstances of morbid

excitement, is to prescribe for its name, and to forget the changes which

climate, season, and previous habits create in all its different states.

17. The loss of a sufficient quantity of blood is often prevented by

patients being apparently _worse_, after the first or second bleeding.

This change for the worse, shows itself in some one or more of the

following symptoms, viz. increase of heat, chills, delirium, hæmorrhages,

convulsions, nausea, vomiting, faintness, coma, great weakness, pain, a

tense, after a soft pulse, and a reduction of it in force and frequency.

They are all occasioned by the system rising suddenly from a state of

extreme depression, in consequence of the abstraction of the pressure of

the blood to a state of vigour and activity, so great, in some instances,

as to reproduce a depression below what existed in the system before a

vein was opened; or it is occasioned by a translation of morbid action

from one part of the body to another.

The chills which follow bleeding are the effects of a change in the

fever, from an uncommon to a common state of malignity. They occur

chiefly in those violent cases of fever which come on without a chilly

fit.

The hæmorrhages produced by bleeding are chiefly from the nose,

hæmorrhoidal vessels, or uterus, and of course are, for the most part,

safe.

Uncommon weakness, succeeding blood-letting, is the effect of sudden

depression induced upon the whole system, by the cause before-mentioned,

or of a sudden translation of the excitement of the muscles into the

blood-vessels, or some other part of the body. These symptoms, together

with all the others which have been mentioned, are so far from

forbidding, that they all most forcibly indicate a repetition of

blood-letting.

I shall briefly illustrate, by the recital of three cases, the good

effects of bleeding, in removing pain, and the preternatural slowness and

weakness of the pulse, when produced by the use of that remedy.

In the month of June of 1795, I visited Dr. Say in a malignant fever,

attended with pleuritic symptoms, in consultation with Dr. Physick. An

acute pain in his head followed six successive bleedings. After a seventh

bleeding, he had no pain. His fever soon afterwards left him. In thus

persevering in the use of a remedy, which, for several days, appeared to

do harm, we were guided wholly by the state of his pulse, which uniformly

indicated, by its force, the necessity of more bleeding.

In the autumn of 1794, I was sent for to visit Samuel Bradford, a young

man of about 20 years of age, son of Mr. Thomas Bradford, who was ill

with the reigning malignant epidemic. His pulse was at 80. I drew about

12 ounces of blood from him. Immediately after his arm was tied up, his

pulse fell to 60 strokes in a minute. I bled him a second time, but more

plentifully than before, and thereby, in a few minutes, brought his pulse

back again to 80 strokes in a minute. A third bleeding the next day,

aided by the usual purging physic, cured him in a few days.

In the month of March, 1795, Dr. Physick requested me to visit, with him,

Mrs. Fries, the wife of Mr. John Fries, in a malignant fever. He had bled

her four times. After the fourth bleeding, her pulse suddenly fell, so as

scarcely to be perceptible. I found her hands and feet cold, and her

countenance ghastly, as if she were in the last moments of life. In this

alarming situation, I suggested nothing to Dr. Physick but to follow his

judgment, for I knew that he was master of that law of the animal economy

which resolved all her symptoms into an oppressed state of the system.

The doctor decided in a moment in favour of more bleeding. During the

flowing of the blood, the pulse rose. At the end of three, ten, and

seventeen hours it fell, and rose again by three successive bleedings, in

all of which she lost about thirty ounces of _sizy_ blood. So great was

the vigour acquired by the pulse, a few days after the paroxysms of

depression, which have been described, were relieved, that it required

seven more bleedings to subdue it. I wish the history of these two cases

to be carefully attended to by the reader. I have been thus minute in the

detail of them, chiefly because I have heard of practitioners who have

lost patients by attempting to raise a pulse that had been depressed by

bleeding, in a malignant fever, by means of cordial medicines, instead of

the repeated use of the lancet. The practice is strictly rational; for,

in proportion as the blood-vessels are weakened by pressure, the quantity

of blood to be moved should be proportioned to the diminution of their

strength.

This depressed state of the pulse, whether induced by a paroxysm of

fever, or by blood-letting, is sometimes attended with a strong pulsation

of the arteries in the bowels and head.

I have mentioned, among the _apparent_ bad effects of bleeding, that it

sometimes changes a soft into a tense pulse. Of this I saw a remarkable

instance in Captain John Barry, in the autumn of 1795. After the loss of

130 ounces of blood in a malignant yellow fever, his pulse became so soft

as to indicate no more bleeding. In this situation he remained for three

days, but without mending as rapidly as I expected from the state of his

pulse. On the fourth day he had a hæmorrhage from his bowels, from which

he lost above a pint of blood. His pulse now suddenly became tense, and

continued so for two or three days. I ascribed this change in his pulse

to the vessels of the bowels, which had been oppressed by congestion,

being so much relieved by the hæmorrhage, as to resume an inflammatory

action. I have observed a similar change to take place in the pulse,

after a third bleeding, in a case of hæmorrhoidal fever, which came under

my notice in the month of January, 1803. It is thus we see the

blood-vessels, in a common phlegmon, travel back again, from a tendency

to mortification, to the red colour and pain of common inflammation.

From a review of the commotions excited in the system by bleeding, a

reason may be given why the physicians, who do not bleed in the depressed

state of the pulse, have so few patients in what they call malignant

fevers, compared with those who use a contrary practice. The disease, in

such cases, being locked up, is not permitted to unfold its true

character; and hence patients are said to die of apoplexy, lethargy,

cholera, dysentery, or nervous fever, who, under a different treatment,

would have exhibited all the marks of an ordinary malignant fever.

In obviating the objections to blood-letting from its apparent evils, I

have said nothing of the apparent bad effects of other remedies. A nausea

is often rendered worse by an emetic, and pains in the bowels are

increased by a purge. But these remedies notwithstanding maintain, and

justly too, a high character among physicians.

19. Bleeding has been accused of bringing on a nervous, or the chronic

state of fever. The use of this remedy, in a degree so moderate as to

obviate the putrid or gangrenous state of fever only, may induce the

chronic state of fever; for it is the effect, in this case, of the

remains of inflammatory diathesis in the blood-vessels; but when blood is

drawn proportioned to the morbid action in the system, it is impossible

for a chronic fever to be produced by it. Even the excessive use of

blood-letting, however injurious it may be in other respects, cannot

produce a chronic fever, for it destroys morbid action altogether in the

blood-vessels.

20. Bleeding has been charged with being a weakening remedy. I grant that

it is so, and in this, its merit chiefly consists. The excessive morbid

action of the blood-vessels must be subdued in part, in a fever, before

stimulating remedies can be given with safety or advantage. Now this is

usually attempted by depleting medicines, to be mentioned hereafter, or

it is left to time and nature, all of which are frequently either

deficient, or excessive in their operations; whereas bleeding, by

suddenly reducing the morbid action of the blood-vessels to a wished-for

point of debility, saves a great and unnecessary waste of excitability,

and thus prepares the body for the exhibition of such cordial remedies as

are proper to remove the debility which predisposed to the fever.

21. It has been said that bleeding renders the habitual use of it

necessary to health and life. This objection to blood-letting is founded

upon an ignorance of the difference between the healthy, and morbid

action of the blood-vessels. Where blood is drawn in health, such a

relaxation is induced in the blood-vessels, as to favour the formation of

plethora, which may require habitual bleeding to remove it; but where

blood is drawn only in the inflammatory state of fever, the blood-vessels

are reduced from a morbid degree of strength to that which is natural, in

which state no predisposition to plethora is created, and no foundation

laid for periodical blood-letting. But there are cases which require even

this evil, to prevent a greater. Thus we cure a strangulated hernia, when

no fever attends, by the most profuse bleeding. The plethora and

predisposition to disease which follow it are trifling, compared with

preventing certain and sudden death.

22. Bleeding has been accused of bringing on an intermitting fever. This

is so far from being an objection to it, that it should be considered as

a new argument in its favour; for when it produces that state of fever,

it converts a latent, and perhaps a dangerous disease, into one that is

obvious to the senses, and under the dominion of medicine. Nor is it an

objection to blood-letting, that, when used in an inflammatory

intermittent, it sometimes changes it into a continual fever. An instance

of the good effects of this change occurred in the Pennsylvania hospital,

in an obstinate tertian, in the year 1804. The continual fever, which

followed the loss of blood, was cured in a few days, and by the most

simple remedies.

23. It has been said that bleeding, more especially where it is copious,

predisposes to effusions of serum in the lungs, chest, bowels, limbs, and

brain. In replying to this objection to bleeding, in my public lectures,

I have addressed my pupils in the following language: "Ask the poor

patients who come panting to the door of our hospital, with swelled legs

and hard bellies, every fall, whether they have been too copiously bled,

and they will all tell you, that no lancet has come near their arms. Ask

the parents who still mourn the loss of children who have died, in our

city, of the internal dropsy of the brain, whether they were destroyed

by excessive blood-letting? If the remembrance of the acute sufferings

which accompanied their sickness and death will permit these parents to

speak, they will tell you, that every medicine, except bleeding, had been

tried to no purpose in their children's diseases. Go to those families in

which I have practised for many years, and inquire, whether there is a

living or a dead instance of dropsy having followed, in any one of them,

the use of my lancet? Let the undertakers and grave-diggers bear witness

against me, if I have ever, in the course of my practice, conveyed the

body of a single dropsical patient into their hands, by excessive

blood-letting? No. Dropsies, like abscesses and gangrenous eruptions upon

the skin, arise, in most cases, from the _want_ of sufficient bleeding in

inflammatory diseases. Debility, whether induced by action or

abstraction, seldom disposes to effusion. Who ever heard of dropsy

succeeding famine? And how rarely do we see it accompany the extreme

debility of old age?"

"If ever bleeding kills," says Botallus, either directly or indirectly,

through the instrumentality of other diseases, "it is not from its

excess, but because it is not drawn in a sufficient quantity, or at a

proper time[53]." And, again, says this excellent writer, "One hundred

thousand men perish from the want of blood-letting, or from its being

used out of time, to one who perishes from too much bleeding, prescribed

by a physician[54]."

[53] Cap. viii. § 4.

[54] Cap. xxxvi. § 4.

It is remarkable, that the dread of producing a dropsy by bleeding, is

confined chiefly to its use in malignant fevers; for the men who urge

this objection to it, do not hesitate to draw four or five quarts of

blood in the cure of the pleurisy. The habitual association of the lancet

with this disease, has often caused me to rejoice when I have heard a

patient complain of a pain in his side, in a malignant fever. It insured

to me his consent to the frequent use of the lancet, and it protected me,

when it was used unsuccessfully, from the clamours of the public, for few

people censure copious bleeding in a pleurisy.

Medical Inquiries and Observations, Vol. 4 The Second Edition, Revised and Enlarged by the Author · 第 12 / 18 段