A System of Midwifery

by Edward Rigby

Artificial dilatation of the os uteri by incision has been practised very rarely, the chief of these operations having had reference to the vagina. F. Ould considered that mere contraction of the os uteri from former lacerations did not require this operation; but that where it was in a state of schirrus, there would be “no chance for saving either mother or child but by making an incision through the affected part.”

We have quoted, on a former occasion, a case of cicatrised os uteri recorded by Moscati, and where, in consequence of injury in a former labour, the opening was nearly closed; fearing the laceration which had occurred in a similar case under his father’s care, in consequence of making merely one incision, he made a number of small incisions round the whole of the orifice until a sufficient dilatation was produced.

Agglutination of the os uteri. Another condition of the os uteri which may produce very considerable impediment to the passage of the child, is that which has been called agglutination, where by some adhesive process, apparently that of inflammation, the lips of the opening adhere and completely close it. These species of imperforate os uteri may occur in primiparæ as well as in those who have borne children: the agglutination of its edges takes place during pregnancy, probably shortly after conception. Upon examination we find no traces of hardness, rigidity, or any other morbid condition, either in the os uteri itself, or the parts immediately surrounding it; the os uteri is closed by a superficial cohesion of its edges, and which in some cases seem to adhere by means of an interstitial fibrous substance; this when of a firmer consistence forms a species of false membrane, which in some cases is capable of resisting the most powerful uterine contractions, and in others it appears to cover the os uteri so completely as to conceal it most effectually, and give rise to the erroneous conclusion that the os uteri is altogether wanting. Baudelocque describes this condition (Op. cit. § 1961;) but from the brief mention which he makes of it, as also from the treatment recommended, it is plain that he had no very distinct notions about it, for he advises that “in all cases the orifice must be restored to its original state, and be opened with a cutting instrument as soon as the labour shall be certainly begun.”

In by far the majority of cases which have been recorded, the pains have after a time been sufficient to dilate the os uteri. Dr. Campbell has described two of these cases, where no os uteri could be traced for some time after the commencement of labour: both were first pregnancies: in the former, uterine action continued about twelve hours before the os uteri could be distinguished, when it felt like a minute cicatrix; the other patient had regular pains for two nights and a day before the os uteri could be perceived, and she suffered so much as to require three persons to keep her in bed; both these patients were largely bled, gave birth to living children, and had a good recovery.

We may suspect that the protraction of labour arises from agglutinated os uteri, when at an early period of it we can discover no vestige of the opening in the globular mass formed by the inferior segment of the uterus, which is forced down deeply into the pelvis, or at any rate, where we can only detect a small fold or fossa, or merely a concavity, at the bottom of which, is a slight indentation, and which is usually a considerable distance from the median line of the pelvis. The pains come on regularly and powerfully; the lower segment of the uterus is pushed deeper into the cavity of the pelvis, even to its outlet, and becomes so tense as to threaten rupture; at the same time it becomes so thin, that a practitioner who sees such a case for the first time would be induced to suppose the head was presenting merely covered by the membranes. After a time, by the increasing severity of the pains, the os uteri at length opens, or it becomes necessary that this should be effected by art: when once this is attained, the os uteri goes on to dilate, and the labour proceeds naturally, unless the patient is too much exhausted by the severity of her labour. Although the obstacle in some cases is capable of resisting the most powerful efforts of the uterus, a moderate degree of pressure against it whilst in a state of strong distention, either by the tip of the finger, or a female catheter, is quite sufficient to overcome it; little or no pain is produced, and the appearance of a slight discharge of blood will show that the structure has given way. Two interesting cases of this kind have been described by the late W. J. Schmitt, of Vienna, under the title of two cases of closed os uteri which had resisted the efforts of labour, and where it was easily dilated by means of the finger.[127]

Contracted vagina. The vagina may be naturally very small, or unusually rigid and unyielding: in the first case serious obstruction to the progress of labour is rarely produced, the expelling powers being generally sufficient ultimately to effect the necessary degree of dilatation; the proper precautions must be taken to avoid every species of irritation and excitement of the circulation; the bowels must be duly evacuated; the circulation controlled either by sedatives, or, if necessary, bleeding, and where it is at hand, a warm bath; if this latter cannot be easily procured, a common hip bath, or sitting over the steam of warm water will be of great service; the great object will be to ensure a soft and cool state of the passage with a plentiful supply of that mucous secretion which is so essential to the favourable dilatation of the soft passages.

Nauseating remedies, and even tobacco injections, have been tried to a considerable extent for the purpose of relaxing the mouth of the uterus; but they produce little or no good effects, and cause much suffering to the patient. In Dr. Dewees’ second case of obstructed labour from the above causes, a sufficient trial of this remedy was used to satisfy all doubts as to its effects. “It produced great sickness, vomiting, and fainting, but the desired relaxation did not take place: we waited some time longer and with no better success. In the course of an hour, or an hour and a half, the more distressing effects of the infusion wore off; and resolving to give the remedy every chance in our power, we prevailed on our patient with some difficulty to consent to another trial of it: its effects were the same as before,—great distress without the smallest benefit, the soft parts remaining as rigid as before its exhibition.” Bleeding was now proposed; the patient became faint after losing ten ounces, and the most complete relaxation followed: the forceps were applied, and a living child delivered.

Rigidity from age. In women pregnant for the first time at an advanced period of life, the vagina and os externum are said to oppose considerable resistance to the passage of the child from their rigid condition, the parts having lost the suppleness and elasticity of youth; the vessels also convey less blood to the mucous membrane and adjacent tissues: hence the secretion of mucus is more sparing; the cellular tissue is more condensed and firm; still nevertheless, although it is constantly mentioned by authors as a cause of this species of dystocia, we cannot help declaring that it exists to a much less degree than has been generally supposed, and that primiparæ at a very early age are much more liable to have tedious and difficult labours than those at an advanced age. Still, however, the circumstance is well worthy of notice; and in such cases we may produce much relief by the warm bath, or hip bath, by sitting over the steam of hot water, by warm water enemata, and great attention to the state of the intestinal canal and of the circulation. Mucilaginous or oleaginous injections into the vagina have been recommended; but we have no experience of their effects: we have frequently used lard, &c. to the edges of the os externum when the head was beginning to distend it, and we think with relief; at any rate it produces a feeling of comfort to the patient, being soft and cooling.

Cicatrices in the vagina. The most serious impediments to the progress of labour connected with the vagina are the contractions of this canal from callous cicatrices, the results of sloughing and other injuries in former labours. The vagina may be contracted throughout its whole length, its parietes hard, gristly, and uneven, and so small as not to admit even the tip of the little finger; the course of the canal from the irregularity of the contractions and adhesions is frequently much distorted; in other cases it is obstructed in different places by bands or septa, which have been produced by similar causes.

Where the condition of the vagina has been ascertained before labour, much may be done to ameliorate the condition of the parts, not only by the treatment already mentioned for rigidity of the vagina under other circumstances, but also by the judicious application of tents, bougies, and other means for dilating the passage. A case of this kind came under our notice some years ago; the patient had been married many years without being pregnant, and was considerably beyond the age of forty. The deranged health and enlargement of the abdomen which took place excited no suspicions of pregnancy either in her mind or that of her medical attendant: the case was suspected to be ovarian dropsy, and a variety of medicines under this supposition were administered, both internally and externally: the commencement of actual labour appears to have been equally mistaken; nor was it until labour had advanced considerably that the real nature of the case was discovered; from its length and severity, violent inflammation and sloughing of the vagina was the result, the canal became much contracted, and was rendered still farther impervious by the formation of strong bands or septa which were stretched across it, and which effectually prevented the os uteri from being reached; sponge tents, and oval gum elastic pessaries of different sizes were introduced, and by degrees such a state of dilatation was produced as not only permitted the os uteri to be reached, but restored the vagina in great measure to its natural size.