A system of practical medicine. By American authors. Vol. 2

by Unknown

Until comparatively recent years the most common cause of mercurial poisoning was the excessive employment of mercurial medicines, whether by ingestion, inunction, or vapor bath. Topical cauterization with acid solution of mercuric nitrate is likewise an infrequent, and usually an accidental, cause of the affection. Elimination of the mercury by way of the mucous glands of mouth and the salivary glands proper excites the stomatitis in these instances. An entirely different series of cases occur in artisans exposed to handling the metal and its preparations or to breathing its vapor or its dust. In these instances the poison may gain entrance into the absorbent system by the skin, the mucous membranes of the nose, mouth, and throat, the stomach, or the lungs. No matter what care may be exercised in cleansing the hands, it is often impossible to prevent occasional transference of the noxious material from fingers to throat, or to thoroughly free the finger-tips under the nails. The avocations entailing the risks of mercurial stomatitis comprise quicksilver-mining, ore-separating, barometer- and thermometer-making, gilding, hat-making, manufacturing of chemicals, and exhausting the globes employed in certain forms of electric illumination.¹⁵ The slow absorption of mercury into the bodies of artisans induces in addition serious constitutional nervous disturbances—tremors, palsy, etc.

¹⁵ Med. and Surg. Reporter, Philada., Dec. 30, 1883, p. 734.

SYMPTOMATOLOGY, COURSE, DURATION, TERMINATIONS, COMPLICATIONS, AND SEQUELÆ.—The principal subjective symptoms of mercurial stomatitis are—characteristic fetor of the breath, sore gums and mouth, continuous nauseous metallic brassy or coppery taste, and profuse salivation.

At first the mouth feels parched and painful, the gums tender, the teeth, the lower incisors especially, set on edge. Soon the gums become swollen, and when touched with the tongue seem to have receded from the necks of the teeth, which thereby appear to be longer than usual. The gums feel quite sore when pressed upon with the finger or when put on the stretch by clashing the rows of teeth against each other. This sort of soreness is often watched for in the therapeutic administration of mercurials purposely given to "touch the gums," as an indication that the system is under the influence of the drug. It is, therefore, one of the earliest indications of mercurial poisoning, but if not sought for it may elude attention until after the mouth has become sore a little later. The pain in the mouth is augmented by efforts of mastication and expectoration, and may be associated with pains at the angle of the lower jaw or extending along the domain of the third or of the third and second divisions of the distribution of the fifth cerebral nerve. Mastication of solid food is often unendurable. Constitutional manifestations become evident about this time in increased heat of skin, acceleration of pulse, furred tongue, dry mouth, great thirst, and loss of appetite. The dryness of the mouth does not last long, but is soon followed by hypersalivation, one of the characteristic phenomena of the disorder. The saliva secreted, often acid in reaction, varies greatly in quantity, which is usually proportionate to the severity of the case. It is secreted night and day, sometimes to the amount of several pints in the twenty-four hours—in moderately severe cases to the amount of from one to two pints in that space of time. It is limpid or grayish, mawkish or somewhat fetid, and reacts readily to the simplest tests for mercury. The salivation is almost continuous, sometimes quite so. The patient soon becomes unable to endure the fatigue of constant expectoration, and the fluid then dribbles from his mouth or runs off in an unimpeded slobber. When excessive, the patient's strength becomes rapidly exhausted—in part by impoverishment of the fluids, in great measure from the lack of refreshing sleep.

Meanwhile, the local inflammatory process extends from the gums to the floor of the mouth and to the lips, and thence to the tongue and the cheeks. The salivary glands are in a state of inflammation likewise, but rather in consequence of direct irritation in the elimination of the poison through their channels than by extension of the stomatitis along their ducts. The lymphatic glands of the lower jaw become engorged and tender. Mastication, deglutition, and articulation all become impeded mechanically by tumefaction of the tissues.

In some instances the glossitis is so great that the tongue protrudes, thereby impeding respiration and even threatening suffocation. In some cases oedema of the larynx has been noted, threatening suffocation from that cause. Should the inflammatory process extend along the pharynx to the Eustachian tubes, deafness and pains in the ears will become additional symptoms.

The subsequent progress of unarrested mercurial stomatitis is that of ulcerous stomatitis.

Should gangrene of the mucous membrane take place, there will be great fetor from the mouth, and some danger of hemorrhage on detachment of the sloughs should the process be taking place in the direction of vessels of some calibre. Necrosis of the inferior maxilla entails continuance of the disagreeable local symptoms until the discharge in fragments or in mass of the dead portions of bone.

In the earlier stages of the attack the constitutional symptoms may be sthenic. Fever, cephalalgia, and the usual concomitants of pyrexia, however, soon give way to the opposite condition of asthenia. Exhausted by the excessive salivation, and unable to repair waste by eating or sleeping, the sufferer soon passes into a condition of hopeless cachexia. Those who survive remain cachectic and feeble for a long time—some of them disfigured for life by various cicatrices between cheeks and jaw, by loss of teeth or of portions of the jaw-bone.

The duration of mercurial stomatitis varies with the susceptibility of the patient, the intensity of the toxæmia, and the character of the treatment. Mild cases may get well in a week or two; severe cases may continue for weeks, and even months; extreme cases have persisted for years. Even moderate cases occasionally resist treatment for weeks.