After-pains. When coagula have remained or formed in the uterus after labour, these irritate it by their presence, and excite it to contract: pains therefore of a crampy spasmodic character are produced, which have received the name of after-pains. Women who have already borne children are more liable to them than primiparæ. They vary considerably in degree: in some cases they are scarcely sufficient to excite attention; in others they rise to great intensity, and may even be mistaken for inflammation; indeed, they occasionally pass into this condition. During these pains the uterus is evidently in a state of contraction, for the fundus feels hard, and for the moment it is more or less painful to the touch: the patient has also pain in the back like a labour pain.
After-pains do not only arise from coagula in the cavity of the uterus irritating it to contraction, but also from little plugs of coagulated blood, which fill the sinuses opening upon the internal surface of the uterus. After awhile they excite contractions, by which they are squeezed out and come away in the discharges: this fact was first pointed out by Dr. Burton in 1751. Having to introduce his hand into the uterus for the purpose of removing a portion of the placenta, he felt several of these little oblong fibrinous masses exuding from the orifices of the uterine sinuses, whenever he at all stretched the uterus by opening his hand; these proved to be so many fibrinous casts of the above vessels, the blood having been retained and coagulated in them, when the uterus contracted after the birth of the child. When the uterus has been slowly emptied during labour, it contracts gradually and uniformly, and forces the blood from its numerous sinuses into the rest of the circulation; but where its contents have been suddenly removed, the contraction is unequal, and a portion of the blood is retained, which coagulates as described. This fact affords an additional argument in favour of putting the child early to the breast: the active contraction of the uterus, which is thereby induced, effectually expels the coagula from its sinuses: hence we see that where a patient suckles shortly after labour, she seldom (cæteris paribus) has severe after-pains; but where this has been delayed until the second or third day, the first application of the child to the breast is sure to induce a sharp attack; the truth of the old adage, that “the child brings after-pains,” is thus verified.
After-pains must be looked upon as an important agent in preventing those attacks of inflammation and fever which arise from the retention of putrid coagula and lochia: they ought not therefore to be checked, unless their severity is such as really demands it: hence the custom of giving an opiate after every labour cannot be too strongly reprobated, for by this means those uterine contractions are suspended, by which nature would have rid herself of the offending cause: nor do we consider ourselves justified in giving an opiate where after-pains are severe, until by change of posture, &c. we are satisfied that no accumulation exists in the passages. “Wherefore,” says Burton, “we must not be too forward in giving strong opiates and other internal medicines, which may take them off while this grumous blood is lodged within these sinuses. I doubt not but those patients who die from the eighth to the fourteenth day, whose uterus has been inflamed with the symptoms above-mentioned, have been injured by the too free use of opiates.” (Essay towards a complete new System of Midwifery, by J. Burton, M. D. p. 342.) We do not deny that a mild sedative is frequently of great benefit after labour: it calms the irritability of the system and procures sleep: these effects will be much better obtained by a little extract of hyoscyamus, lettuce, or hop. Where an opiate is really necessary, twenty minims of Liq. Opii Sed. in any aromatic water will be as good a form as any.[76]
CHAPTER III.
MECHANISM OF PARTURITION.
Cranial presentations—first and second positions.—Face presentations—first and second positions.—Nates presentations.
If we were asked to point out the basis on which the principles of practical midwifery should be founded, we would answer, on an accurate knowledge of the manner in which the child presents, and passes through the pelvis and soft parts during labour. In confirmation of this remark, we may observe, that almost every great improvement in midwifery practice which has taken place during the last century, has resulted from farther investigation into this difficult field of inquiry, and from the gradual addition of new facts to our knowledge respecting this interesting process.
Unless a practitioner be thoroughly acquainted with every step in the mechanism of a natural labour, how can he be expected to understand and detect with certainty any deviation from its usual course, still less make use of those means which may be required under the particular circumstances of the case; and yet, strange to say, there are few subjects which, generally speaking, have excited so little attention, and upon which such incorrect opinions have prevailed even up to the present time. The investigation is confessedly one of considerable difficulty, and as it was more easy to calculate how the head ought to pass in this or that position through the pelvis than to ascertain how it really did pass, ingenuity has been taxed, and theories have been invented, and positions of the child without number have been described, which have never existed in nature, and which have only added to the difficulty and perplexity of the subject.