part 3. 1836.[124])

Where the action of the uterus is not very violent, and the bones yielding, the head gradually adapts itself to the form of the passage without destroying the foetus; it elongates itself more and more until it is enabled to pass, so that after a tedious labour of this sort, we sometimes find the configuration of the head remarkably altered. Baudelocque, has mentioned a case recorded by Solayres de Renhac, where the head was so elongated that the long diameter measured eight inches all but two lines, the transverse being only two inches and five or six lines.

_Treatment._ Where the pelvic deformity is very considerable, there can be little difficulty in deciding upon the line of conduct to be adopted. It is in those cases where the obstruction is but slight that the indications for treatment are less distinctly marked: nor must we be satisfied with merely ascertaining the relative proportions of the head and pelvis; for the hardness or softness of the cranial bones, the disposition which they manifest to yield to the pressure of the uterus and surrounding parts, the state of the cranial integuments, and though last not least, of the soft tissues which line the pelvis, must all be carefully ascertained before a correct opinion as to the precise mode of treatment can be formed. Nor, if the woman has already had children, can we altogether be guided by the history of her previous labours; for where the above-mentioned circumstances have been favourable, a slight diminution of the pelvis will scarcely be attended with any perceptible delay or increase of difficulty beyond the natural degree; whereas, if the head happens this time to be a little larger, its bones more ossified, the fontanelles smaller, the scalp and soft linings of the pelvis more swollen, &c. a serious obstruction to the progress of labour will be the result. Thus it is that we not unfrequently meet with patients in whom the first labour has been tolerably easy, the second has been attended with much difficulty and required the forceps, in the third, the difficulty was so much increased as to require perforation, and the fourth where the labour was, like the first, perfectly easy and natural.

It is impossible for the head to remain long in the pelvis (except under unusually favourable circumstances) without more or less obstruction to the circulation, both in the scalp itself and in the surrounding soft tissues. The necessary consequence of this is swelling, by which the head increases while the passage diminishes in size; and this must still be more remarkably the case where the pelvis is at all contracted. It is in these cases that we frequently see such relief produced by venesection; and it is also as a topical depletion to the overloaded vessels, that we can explain why a free secretion of mucus is so favourable a symptom.[125]

_Prognosis._ Where the pains are moderate and equable, the os uteri nearly or quite dilated, the head not large, its bones yielding and overlapping at the sutures; where the greater portion of it has evidently passed through the brim, and, although slowly, advances perceptibly with the pains; where the passages are cool and moist, the pulse good, and the patient not exhausted, we may safely wait awhile and trust to the efforts of nature. On the other hand, where the pains are violent, the os uteri thin and undilatable, the head forced forwards upon the symphysis pubis by the projecting serum, if the greater part of its bulk has not yet passed the brim, if the soft parts are much swelled, the vagina hot and dry, the pulse has become irritable, the abdomen tender, the patient exhausted and much depressed both in mind and body, the powers of nature are evidently incompetent to the struggle, and require the assistance of art.

Such cases seldom permit the application of the forceps; the head is already pressing too firmly against the brim, and its greatest bulk having not yet passed, a still farther increase of pressure will be required to effect this object, which therefore cannot be attained without producing serious mischief. Where, however, the head has fairly engaged in the cavity of the pelvis, and the case is rather becoming one of deficient power, the forceps will be justifiable, and generally quite sufficient to effect the delivery safely.

The young practitioner must be cautious not to mistake an increase in the swelling of the scalp for an actual advance of the head itself--an error which may very easily be committed if he merely touches the middle of the presenting portion: he must carefully examine the circumference of the presenting part, where the head is pressing against the pelvis, and where there is little or no swelling, and he will frequently find to his disappointment, that although the cranial swelling may have even nearly approached the perineum since his last examination, the head itself has remained unmoved.

Where the forceps has been determined upon, we should endeavour to render its action as favourable as possible, viz. by bleeding, by the warm bath, and by evacuating the bladder and rectum before proceeding to the operation: we thus improve the condition of the soft parts, and diminish the chances of its acting injuriously.

From what has now been stated respecting the various circumstances which may tend to aggravate or alleviate the existing degree of pelvic deformity, it will be seen how incorrect and unpractical must be the attempt to classify the means of treatment merely according to the dimensions of the pelvis. To assert that within certain limits of pelvic contraction the child can be delivered by the natural powers, and that beyond these limits the forceps must be used; and that where it proceeds to a certain extent farther, it can only be delivered by perforation, &c. is evidently objectionable: for there are no two cases alike, even supposing that the degree of pelvic contraction is exactly similar; hence, on the one hand, we might (under such fallacious guidance) be induced to trust to the natural powers when they are wholly incompetent to the task, and on the other, to have recourse to art when the real condition of the case justified no such interference.[126]

With regard to the diagnosis and treatment in the case of obliquely distorted pelvis (pelvis obliqué ovata,) our data are still too scanty to enable us to give any decided rules: the immobility of the head, although the antero-posterior diameter appears of its full length, the shortness of one oblique diameter, and consequent undue pressure upon the head in this direction, and the unusual length of the other, are the characteristics which we have observed in the only case of the kind which has come under our notice during life. In all the cases of labour rendered difficult by this condition of the pelvis, which have been collected by Professor Naegelé, the perforation has been strongly indicated; and where the forceps has been used, it has either failed, as with us, or if the delivery has been effected by this means, it has been attended with fatal consequences.

In _exostosis_ of the pelvis we must be guided by our knowledge of the healthy pelvis, and by our carefully ascertaining the form and size of the bony growth, and in what degree it is likely to impede the passage of the child. As in cases of simple projection of the promontory, the head may be capable of passing, but in doing so becomes more or less distorted: thus Dr. Burns quotes a case from Dr. Campbell, where from exostosis within the pelvis, the left frontal bone was so greatly sunk in, as to make the eye protrude. Professor Otto, of Breslau, mentions a woman who had pelvic exostosis being the mother of four children, in each of whom a small portion of the cranium was depressed and not ossified.

An interesting case has been described by Dr. Kyll, of Cologne, where the patient was the mother of seven children; her former labours had been perfectly natural, except that in the last there had been preternatural adhesion of the placenta, which had required to be removed by the hand; in six days after she was seized with feverish symptoms and violent pain at the spot where the placenta had been attached. The attack yielded to proper treatment, but she continued feverish at night with perspirations, frequently deranged bowels, difficulty in passing water, and severe pain in the abdomen, especially when she tried to stand on the right leg. An abscess formed in the right groin, which was opened and discharged a large quantity of pus, from which her recovery was very slow, and in three years afterwards she became again pregnant. When labour came on, no presenting part could be reached; after a long time the feet came down one after the other, but the nates would not advance. Dr. Kyll found the child resting with the hips on the brim of the pelvis, and completely wedged fast by a hard immoveable tumour as large as a hen's egg, springing from the upper part of the right sacro-iliac symphysis, and apparently having been a result of the pelvic abscess; the child was delivered with great difficulty by embryotomy.

Perhaps the most remarkable case of pelvic exostosis is that which has been described by Dr. Haber of Carlsruhe, and where also the cause was ascertained to have arisen from a violent fall on the ice when carrying a heavy load upon the head; on coming to herself the woman found that she was unable to move, and in this state was conveyed home; she recovered to all appearances in a few weeks, married, and soon became pregnant. When labour came on it was found impossible to deliver her, from the pelvis being entirely filled with a huge exostosis: the Cæsarean section was performed, but she died, and on examination after death an immense mass of bony growth was found springing from the sacrum, which had been apparently fractured, not only filling up the whole cavity of the pelvis, but arising to a considerable extent above the brim.

In those cases of funnel-shaped pelvis which we have had the opportunity of observing, perforation has been ultimately required, although the head had passed easily through the brim and entered the cavity; in one of these we have subsequently used the artificial premature labour with success.

We have already stated the doubtful utility of arranging cases of deformed pelvis according to their degree of contraction, and of classifying the different modes of treatment by such a scale; still, however, there must be certain limits beyond which it will be impossible to make the child pass, even when diminished by embryotomy. To draw the precise line of demarcation, however, will be nearly if not quite impossible; and, as in cases of slighter deformity, we must take many other circumstances into consideration which we have already mentioned. An inch and a half from pubes to sacrum has been mentioned by many as the extreme degree of contraction through which a full grown child can be delivered by embryulcia; generally, however, in these cases of unusually deformed pelvis, there is much more space on each of the sacrum; and on this, in great measure, will depend the possibility of effecting the delivery. The celebrated case of Elizabeth Sherwood, which Dr. Osborn has recorded, and where he succeeded in delivering the child, although the antero-posterior diameter "could not exceed three-quarters of an inch," has been looked upon as being of doubtful accuracy, and that Dr. Osborn had unintentionally deceived himself. When, however, we learn that on the right side of the sacrum the antero-posterior diameter was an inch and three-quarters, the incredible nature of the case diminishes considerably, the more as the patient was examined by Dr. Denman and others who fully coincided with Dr. Osborn's statements. To assert that in this case the antero-posterior diameter was only three-quarters of an inch, as many have done, is evidently incorrect, and tends to throw doubt upon it: the case was evidently the closest possible approach to the limits requiring the Cæsarean operation; its success was mainly attributable to the gradual manner in which it was performed; the child had become completely soft and flaccid from putrefaction, and was thus more capable of being moulded to the contracted passage.