A System of Midwifery

by Edward Rigby

Pendulous abdomen. Where, from great relaxation of the anterior abdominal wall, (a frequent result of repeated child-bearing,) the fundus is inclined so forwards as almost to hang over the symphysis pubis, the child’s head does not readily enter the brim of the pelvis, nor can the uterine contractions act so favourably in dilating the mouth of the womb; and in this manner the first part of labour may be considerably retarded. Pendulous abdomen to this great extent is not very common; and in ordinary cases the horizontal posture, especially upon the back, is quite sufficient to allow the head to engage in the pelvis. “We have found more than once,” says Dr. Dewees, “in cases of extreme anterior obliquity, that it is not sufficient for the restoration of the fundus that the woman be placed simply upon the back; but we are also obliged to lift up and support by a properly adjusted towel or napkin, the pendulous belly until the head shall occupy the inferior strait. To illustrate this, we will relate one of a number of similar cases in which this plan was successfully employed. Mrs. O., pregnant with her seventh child, was much afflicted after the seventh month with pain and the other inconveniences which almost always accompany this hanging condition of the uterus; was taken with labour pains in the morning of the 10th of October, 1820. We were sent for about noon. The pains were frequent and distressing, and, upon examination per vaginam, the mouth of the uterus was found near the projection of the sacrum, dilated to about the size of a quarter dollar, but pliant and soft. During the pain, the membranes were found tense within the os uteri, but did not protrude beyond it.

As this was the first time we had attended this patient, and from the history she gave of her former labours, in which she represented her abdomen being in all equally pendulous, with the exception of the first, we waited several hours (she being placed upon her side) for the accomplishment of the labour. During the whole of this period the head did not advance a single line; nor could it, as the direction of the parturient efforts carried it against the projection of the sacrum. We had several times taken occasion to recommend her being placed upon her back, but to which she constantly objected, until we urged its being absolutely necessary. She at length reluctantly consented to the change of position; when upon her back it was found that it did not advance the os uteri sufficiently towards the centre of the superior strait. The abdomen was therefore raised, and a long towel placed against it, and kept in the position we had carried it by the hands, by its extremities being firmly held by two assistants; at the same time we introduced a finger within the edge of the os uteri, and drew it towards the symphysis pubis, and then waited for the effects of a pain. One soon showed itself, and with such decided efficacy, as to push the head completely into the inferior strait, and three more delivered it.” (Compendious System of Midwifery, § 224.)

This peculiar displacement of the uterus, which has been called by some anteversion of the gravid womb, has occasionally given rise to the suspicion that there was no os uteri, from its being tilted upwards and backwards towards the promontory of the sacrum: it has been said, in some cases, to have even contracted adhesions with the posterior wall of the vagina, from the firmness with which it was pressed against it, and thus tended still farther to increase the deception. “Within our knowledge,” says Dr. Dewees in the paragraph preceding the one just quoted, “this case has been mistaken for an occlusion of the os uteri, and where upon consultation it was determined that the uterus should be cut to make an artificial opening for the fœtus to pass through. They thought themselves justified in this opinion, first, by no os uteri being discoverable by the most diligent search for it; and, secondly, by the head being about to engage under the arch of the pubes covered by the womb. Accordingly, the labia were separated, and the uterine tumour brought into view. An incision was now made by a scalpel through the whole length of the exposed tumour down to the head of the child, the liquor amnii was evacuated, and in due course of time the artificial opening was dilated sufficiently to give passage to the child. The woman recovered, and, to the disgrace of the accoucheurs who attended her, was delivered per vias naturales of several children afterwards, a damning proof that the operation was most wantonly performed.” Where, in addition to the anteversion, strong adhesions have taken place between the os uteri and posterior wall of the vagina, no trace of os uteri will be felt, and the operation above-mentioned does become sometimes necessary.

Rigidity of the os uteri. The chief way in which the uterus can obstruct the passage of the child, is, by an undilatable state of its mouth: this may arise from a variety of causes, which may be chiefly brought under the two heads of functional and mechanical. Under the first head comes rigidity of the os uteri, either from a spasmodic contraction of its circular fibres, or from irregularity or deficiency in the contractions of the longitudinal fibres of the whole organ. In a slight degree this is frequently met with, especially in first labours, where the patient is young, delicate, and irritable, and where, in all probability, there is some source of irritation in the primæ viæ which tends to disturb and divert the proper and healthy action of the uterus. We see it also in robust plethoric primiparæ; the os uteri dilates to a certain degree, perhaps an inch in diameter, and remains tense and firm, with its edge thin; the contractions of the uterus produce much suffering, and to all appearances are very violent; but they are chiefly in front, and produce little or no effect upon its mouth; the vagina is hot and dry, the patient becomes exhausted with fruitless pains, and fever or inflammation would quickly follow, if nothing be done to relieve this state. As this subject, however, belongs rather to the next species of dystocia, viz. that arising from a faulty condition of the expelling powers, we shall delay the consideration of the treatment.

Belladonna. It has been recommended, and not very judiciously, to apply belladonna to the os uteri in cases of great rigidity: it was repeatedly tried by the celebrated Chaussier in the Maternité, at Paris, and, according to his observations, it produced a considerable effect upon it. “The knowledge of the extraordinary powers which this drug possesses in causing dilatation of the iris, led to its employment for the object of enlarging the aperture of the uterus; but there is certainly no similarity in the structure and office of the two organs, and no analogy can be drawn between their functions. It is not likely that this means will produce the relaxation we require; and if no good results from its use, it must be injurious; not in consequence of the poisonous quality resident in the drug itself, but in the friction which is necessary for its efficient application. The mucus which naturally lubricates the part must be wiped away, and this irritation must predispose the tender organ to take upon itself inflammatory action.” (Dr. F. H. Ramsbotham’s Lectures, in Med. Gaz. May 3, 1834.)

For our own part we must confess, that, although we have seen this application tried repeatedly, it has never produced the desired effects, but has invariably brought on very troublesome and distressing symptoms, such as sickness, faintness, headach, vertigo, &c.

There is a condition of the os uteri which is occasionally met with, and which presents a degree of rigidity which we have never seen except where there have been adhesions and callous cicatrices from former injuries. It has nothing of the thin edge put strongly on the stretch during the pains; but it is thick and firm, presenting nothing of the elastic cushiony softness of the os uteri in a favourable state for dilatation; it dilates to about an inch across, tolerably regularly, and without much apparent difficulty, but no efforts of the uterus can dilate it farther. We have already alluded to two extreme cases of this when speaking of ruptured uterus, and where in each instance the os uteri entirely separated from the uterus and came away. Whether there is something peculiar in the structure of the part which renders it thus undilatable, or whether it required even still more powerful measures than those employed, is not very easy to decide.

Edges of the os uteri adherent.—Cicatrices, &c. A serious impediment to the passage of the child may be produced by adhesions of the sides of the os uteri to each other; by hard callous cicatrices resulting from ulcerations, lacerations, &c. in former labours; by abnormal bands, or bridles, as they have been called; and by tumours and other morbid growths. Where the structure of the os uteri has been much injured by previous injuries of this character, the resistance will probably be so great as to require artificial dilatation with the knife. Generally speaking, however, the whole circle of the uterine opening is not involved, portions still remaining of natural structure, and, therefore, capable of dilatation. On examination, it feels irregular both in shape and hardness; a part being soft, cushiony, yielding, and forming the segment of a well-defined circle, the rest of it uneven, knobby, and hard, being evidently puckered up by cicatrisation.

In many cases, these callous contractions give way more or less when the head begins to press powerfully against them; but even where this is not the case, the healthy portion of the os uteri is so dilatable as to yield sufficiently. It would be difficult to estimate how far an os uteri in this state, with perhaps, not more than half, or even a third, of its circle in a healthy condition is capable of dilating. But from cases which have come under our own observation, and others which have been recorded by authors in whom we place the greatest reliance, we are quite confident that with proper treatment a sufficient degree of dilatation can be effected without resorting to artificial means.

Bleeding to fainting, the warm bath, laxatives, and enemata, will assist greatly in promoting our object. Where, however, the contracted portion shows no disposition to yield to this treatment, or to the pressure of powerful pains, but forms a hard resisting bridle or band, which effectually impedes the farther advance of the head, it must be divided by the knife in order to prevent dangerous laceration of the part on the one hand, or protraction of labour on the other. The mode of doing this will be described when these conditions as effecting the vagina are considered.