Part 108

Constipation may be defined to be that condition in which there is a prolonged retention of the feces or in which they are habitually expelled with difficulty or in insufficient quantity. While there are individual peculiarities due to habit or nature, the custom with most persons of having one movement in the twenty-four hours would cause any longer retention of the rectal contents to be considered constipation. The limits between health and disease are not well defined, and a failure to evacuate the bowels for several days need not be considered pathological nor require medical interference. In persons otherwise in good health such an occurrence due to neglect, change of habit or diet, as in travelling, would cause no interruption to health or comfort. Nature brings relief sooner or later and re-establishes order and regularity. In many cases constipation is a primary disease and the cause of many secondary disturbances, but it is often the effect or the symptom of various acute and chronic diseases. It may be acute or chronic.

In long-continued constipation the intestinal contents are so retarded in their progression along the canal that they undergo a too early and too complete absorption of their fluid portion. In time there are an accumulation and impaction of dry fecal masses in the rectum, sigmoid flexure, descending transverse colon, or cæcum. An obstacle is thus created which may ultimately close the tube entirely and cause intestinal obstruction.

ETIOLOGY.--1. Constipation occurs most frequently in advanced life. It is the effect of loss of peristaltic force and of a diminution of sensibility in the lower bowel, and is associated with general functional inactivity and with muscular degeneration and obesity. Infants are more subject to constipation than children of one year and over. In many instances this is due to artificial feeding with cow's milk, condensed milk, and the patent foods so largely used, or with any diet unsuited to the digestive organs. Imperfect digestion of casein or other food, the filling of the bowel with a dry mass difficult to propel, and the consequent catarrhal state of the mucous membrane, are causes of both constipation and diarrhoea. Feeble, delicate children with imperfect muscular development, and children born rachitic, scrofulous, or syphilitic, are generally constipated.

2. Women are prone to constipation much more than men. False modesty, which imposes restraint upon young girls, and their ignorance {640} of the necessity of regularity, their habits of indoor life, and avoidance of exercise, are largely the causes of this. But the anatomical structure and physiological life of the woman offer another explanation. At every menstrual period the uterus enlarges and exercises a greater compression upon the rectum. A tender and enlarged ovary (and at the menstrual epoch the ovary is always tender and enlarged) exercises an inhibiting action upon the muscles which bring the feces in contact with it in their downward passage. In the married woman recurring pregnancies lead to the habit of constipation from the long-continued pressure upon the colon, sigmoid flexure, and rectum, from the extreme stretching of the abdominal muscles, and from the paralyzing effect of compression during labor. The relaxed condition of the pelvic and abdominal organs after labor offers no resistance to the distension of the rectum and sigmoid flexure. The cessation of the catamenia is accompanied with constipation, nervousness, and a feeling of ill-defined apprehension when the bowels are moved, or abdominal pains deter many persons, chiefly women, from habits of regularity. All uterine and ovarian derangements by mechanical or reflex means bring about the same result. Chlorosis and anæmia in girls are almost invariably associated with constipation.

3. Hereditary influence shows itself very markedly in the tendency to constipation which is seen in many members of the same family. This is probably more often apparent than real, and is the result of neglect of the proper attention to the wants of children and of the perpetuation of vicious habits of taking purgatives.

4. The habits of life and the occupation of the individual have much to do with the causation of constipation. Those who lead active outdoor lives are generally regular in their daily movements, but persons of sedentary pursuits or who work in constrained attitudes--lawyers, clerks, tailors, shoemakers, and seamstresses--are predisposed to constipation. Intellectual work, not only from the muscular inactivity which it entails, but from the diversion of energy to the nerve-centres, develops the constipated habit as well as indigestion. Men who are overworked in business, employés in banks, government offices, shops, etc., bring on the habit from the hurry incident to their occupations. Luxurious and enervating habits of life, over-eating and sloth, with the over-indulgence in alcohol and tobacco, have the same effect. All the influences which deteriorate health, such as bad ventilation and over-heating of rooms, foul air, want of cleanliness of the person, indigestible food, imperfect mastication, tight-lacing in women, compression of the abdominal organs in men, can be said to share in bringing it about. Servants, especially women, are constipated more frequently than their masters. This is due to ignorance and neglect, and sometimes to excessive tea-drinking and irregularity in eating.

5. Neglect to establish or continue a habit of daily regularity in defecation leads to the accumulation in the rectum of masses of feces. Resisting the desire to empty the bowel interrupts the necessary reflex acts, and finally the muscular excitability and response to the presence of feces are entirely wanting. The continued contact of fecal matter with the mucous membrane wears out its susceptibility; the over-distension of the rectum enfeebles the power of its muscular wall, as is the case when all hollow muscular organs--stomach, heart, bladder--are overstretched. Thus a {641} neglect to answer the demand for a daily movement and the failure to completely empty the rectum will gradually develop constipation in a person who has before been perfectly well regulated. In childhood failure to teach and to insist upon good habits is the cause of much of the trouble of after-life.

6. Acute and chronic diseases of the brain and spinal cord bring about constipation. Meningitis, encephalitis, and myelitis, senile dementia and softening, have it as a symptom at some time or other. In encephalitis and myelitis there is an interruption of motor nerve-currents. In meningitis and tetanus the muscular walls of the bowel and the abdominal muscles are in a state of tonic contraction.

7. The use of aperients is an important agent in developing the constipated habit by over-stimulating and wearing out muscular activity. The idea that a daily movement is a necessity, and that an occasional purgative is useful in relieving the system of morbid matter which would otherwise induce disease, is the chief source of this hurtful custom. The traditional meaning attached to the term biliousness implied the resort to cathartics for its relief, and it is much to be regretted that with our more advanced knowledge the effort should be made to revive the use of this term, which was wellnigh abandoned. More ignorance and erroneous treatment has hung upon the theory of biliousness than upon any other doctrine of medicine within the past thirty years: it is well for physicians to condemn it and to resist its reintroduction into scientific phraseology. If the term bilious as applied to diseases were abandoned, much good would come of it. The general use of purgative mineral waters has added to this evil. Among the better classes these waters play the same part as the liver regulators and vegetable pills do among laborers and servant-maids. Both gratify the innate love for self-medication by a resort to cathartics for the slightest ailment. At first the injurious effects are not apparent, but in time the reflex function is not brought into activity except by artificial aids. The intestinal and rectal muscles must be whipped into action, their normal contractile power being lost.

8. Certain vegetable and mineral substances taken either intentionally or by accident constipate the bowels. Chief among these stand opium and its preparations. All opium-eaters are constipated. Lead which is accidentally taken into the system by workers in metals, painters, etc. invariably produces obstinate constipation. The use of tobacco in excess has the effect of deranging digestion and causing constipation in many persons, but this result is occasional only.

9. Chronic diseases of the lungs and heart, by enfeebling the muscular movements which take part in defecation, as well as by the general feebleness and the chronic intestinal catarrh and indigestion which they create, are causes of constipation. Chronic diseases of the liver, especially cirrhosis, are also causes. Constipation accompanies obesity, for in very fat persons the abdominal walls have but little power of contraction; the {642} muscle-layer is thin and flaccid. There is also in such persons in advanced life an accumulation of fat in the mesentery and around the colon. The muscle of the bowel is in a state of fatty degeneration, and atony and dilatation of the gut follow.

10. Painful affections about the rectum and anus deter persons from yielding to the desire for defecation. Fissure of the anus is the principal one of these, but fistula, hemorrhoids, and local eczema have a similar influence. A simple rigidity or spasmodic stricture of the anal sphincter creates constipation.

11. Constipation is a symptom in chronic cachexiæ and wasting diseases, in the convalescence of acute exhausting illness, as typhoid fever and pneumonia, or in persons bedridden from any cause. Defective nutrition and degeneration of the muscle-fibre of the intestine explain these cases. In some of them, with improved nutrition, regeneration takes place with a return of contractility.

12. Disorders of the digestive system have constipation as a consequence and a symptom. The reflex sympathy between the movements of the stomach and of the intestines brings this about in gastric diseases. It occurs in gastric cancer and ulcer, in acute and chronic gastritis, in dilatation of the stomach, and in pyloric stricture. The small amount of ingesta entering the duodenum in these diseases diminishes the bulk of fecal matter. In acute intestinal catarrh diarrhoea is the rule, but the bowels may be constipated in intense inflammation and ulceration of the mucous membrane, as is often the case in typhoid fever. In chronic intestinal catarrh constipation is more common in the mild forms than diarrhoea. The thickening and irritation of the mucous membrane lead to a diminution of reflex excitability and loss of elasticity and contractility in the muscular coat. Hence, except in cases where the inflammation is low down or where ulcers have formed, constipation is a more frequent symptom than diarrhoea. The alteration in the quantity and character of the intestinal secretions in chronic catarrh is stated to be an important element. This is to some extent true. Mucus, which is the chief product of this condition, leads to indigestion and fermentation of the intestinal contents and to increased irritation of the mucous membrane. The evolved gas distends the bowel and weakens its contractile power. The fecal mass when it reaches the rectum has an excess of mucus within it or around it which makes its expulsion more difficult. But the diminution or absence of bile does not constipate. In simple jaundice diarrhoea is not uncommon, and an excess of bile does not of necessity cause diarrhoea.

The effects of the modifications of the pancreatic secretion are not well known. Pancreatitis is attended by constipation. Fatty diarrhoea is believed to follow occlusion of the pancreatic duct by pancreatic calculi and chronic catarrh of the duct. Peristalsis is lost in peritonitis from the muscular coat being infiltrated with serum and paralyzed, but tuberculous peritonitis is frequently accompanied by diarrhoea.

13. Loss of fluids by abundant perspiration, by diuresis, diabetes and lactation, increases the dryness of the bowel contents and hinders free {643} evacuations. This is observed as a result of the arrival in a tropical climate and in very hot weather in any climate. The profuse sweats accompanying phthisis, acute rheumatism, intermittent fever, and unusual exercise cause constipation. Another explanation which applies to this has been offered by Good and Eberle, who ascribe constipation to the excessive action of the absorbents in the small intestine, by which the fluid portion is too rapidly and too thoroughly removed. Exercise by promoting activity of the functions in general may induce constipation in this way. In spermatorrhoea the stools are infrequent. An insufficient amount of water taken with food is another cause.

14. Food which has but little waste to be got rid of--as milk or beef--leaves a small residuum to be propelled along the intestine, and therefore in one sense is constipating. Insufficient food acts in the same way. An indigestible diet in excess, especially vegetable food, a large part of which is insoluble, constipates by filling the bowel with matter which cannot be got rid of, and chronic catarrh results. The stones and seeds of fruits, as cherry- and plum-stones, raspberry- and currant-seeds, husks of corn and oats, produce acute or chronic constipation with serious symptoms. Intestinal worms (generally lumbricoids) when in large numbers cause obstruction of the bowel; and various foreign substances taken by caprice or to take the place of food have produced the same result: among these stick cinnamon, sawdust, and clay (among the clay-eaters of the South) have been mentioned. Magnesia, insoluble pills, and other medicines sometimes form concretions in the bowel. Enteroliths and accidental concretions form in the intestinal canal and are sources of obstruction. Any foreign body is a nucleus around which concentric layers of phosphate of lime are deposited, and thus a hard calculus is formed. Gall-stones may pass into the canal and there accumulate in such numbers as to interfere with the passage of the fecal matter.

PATHOLOGICAL ANATOMY.--In cases where constipation has lasted many years no alteration of the parts involved may be found. When lesions do occur the pathological anatomy includes changes in the position, calibre, and in the walls and contents of the intestines. The most common displacement is that of the transverse colon, which is depressed in its centre; the acute angle of the descending part may reach as far down as the hypogastrium. The cæcum sometimes lies in the centre of the abdomen. Dislocations of the intestines are congenital, due to anomalies of intra-uterine development, in which case they become causes of death in newly-born children from obstruction, or if insufficient to cause death they establish habitual and incurable constipation; or constipation may bring about displacement by the greater weight of a portion of the bowel constantly loaded with fecal matter.

The sigmoid flexure is usually the seat of the greatest dilatation; its expansion may be a cause or a consequence of constipation. It may reach a maximum of distension when it fills the entire abdominal cavity, compressing all the abdominal organs and pushing the stomach, liver, {644} and intestines into the thorax. In a case of this kind the circumference of the dilated part was twenty-seven inches. The descending colon may be distended with the sigmoid flexure, or the whole colon may be dilated from the upper part of the rectum to the cæcum; the same thing happens rarely in the small intestine. In one case, in which there was an accumulation of feces in the sigmoid flexure, the large intestine presented itself as two immense cylinders lying side by side, extending from the epigastrium to the pelvis. Each was about five and a half inches in diameter, and together they filled the abdominal cavity. The circumference of the stretched colon varies from ten to thirty inches. Pouches forming little rounded tumors are seen on the outer surface of the colon; they are sometimes hernial protrusions of the mucous membrane through the muscular coat (Wilks and Moxon), or if large they are dilatations of the pouches of the colon.

The colon is sometimes much lengthened. But little weight can be attached to this anomaly, as there is a difference in the length of the colon in different nations and individuals, depending upon the character of the food, being longer in those who eat largely of vegetable food.

The mucous membrane is normal or hyperæmic, or is in various stages of chronic catarrh. Proctitis may exist with follicular ulcers; ulcers form in the cæcum, sigmoid flexure, and in the bends of the colon; perforations and peritonitis rarely occur. Chronic peritonitis has resulted from the stretching of the bowel from retained and hardened feces; adhesions may form which ultimately cause death by obstructing the canal. The walls of the intestines are in long-standing cases much thinned. There are many reasons to believe that fatty degeneration of the smooth muscular fibre takes place, in consequence of which it loses its contractile power and atrophies. This lesion is most common in advanced life, and accompanies fatty accumulation and degeneration elsewhere. Its results would be constipation, distension of the bowel with gas, and sometimes symptoms of intestinal obstruction. A thinned and dilated bowel may easily be lacerated under unusual stimulation, as from a purgative. In a case recently seen by the writer such an accident, rupture of the colon and death from peritonitis, occurred from the effects of an active purge taken to bring on abortion. Hypertrophy of the wall, especially of the muscular coat, coexists with dilatation, and is most common in the upper part of the rectum and sigmoid flexure. It is caused by overwork in expelling fecal accumulations. The walls never become as much thickened as in constipation from organic stricture.

Collections of fecal matter may be found in any portion of the colon, but more frequently in the rectum, sigmoid flexure, descending or {645} transverse colon, or cæcum. They lie within the intestinal tube, partly or wholly occluding it, or within lateral pouches, forming tumors which are sometimes quite large. In this last form there is no obstacle to the free passage of feces along the canal. Fecal accumulations occur as small round, oval, or irregularly-shaped lumps (scybalæ), and are often covered with layers of transparent semi-fluid mucus, puriform mucus, or mucus in filaments. The small concretions vary in density; they may be so hard as to resist the knife, and may be mistaken for gall-stones; larger masses, semi-solid or solid, are most commonly seen in the rectum and sigmoid flexure. Here the collection may reach an immense size. In one case fifteen quarts of semi-solid, greenish-colored fecal matter were removed at the autopsy. In two other cases the weight of the feces found in the bowel was thirteen and a half and twenty-six pounds respectively. The whole colon from the anus to the cæcum may be filled with such a mass, as in a case mentioned by Bristowe, where the colon "was completely full of semi-solid olive-green colored feces. The small intestines were also considerably distended, ... and were filled throughout with semi-fluid olive-green contents."

The color of these collections is black, reddish, deep green, or yellow. In composition the scybalæ, concretions, and larger masses consist of fecal matter, with unaltered vegetable fibre; they may be composed partly of skins of grapes, cherry-stones, biliary calculi, hair, woody fibre, magnesia, or other foreign substances. Where fecal concretions long remain in the intestine they acquire a hardness like stone, and can with the microscope only be distinguished from mineral matter. Hemorrhoidal tumors, anal fissures, perirectal abscesses, fistulæ communicating externally or with the gut, are found in connection with constipation. Abscess of the iliac fossa has been observed in the same relationship.

SYMPTOMS.--In persons who have a daily movement an occasional interruption of two to four days may take place without local or general signs of inconvenience. It is often asserted by patients that one day's omission induces suffering, and recourse is immediately had to laxatives. This may be justified sometimes, but in the majority of cases no actual suffering follows a very rare and short constipation. If, however, symptoms do occur after a constipation of one to three days, there is a sense of fulness and heat about the rectum which is greater after stool; when the bowels are moved, it is with effort (provided that no enema or purgative has been taken), and the bulk of the expelled mass is much greater {646} than usual, being moulded and hardened from its longer retention in the rectum. The margins of the anus are tender, and the unsatisfied feeling after stool is due to distension of the hemorrhoidal veins and oedema of the tissues around them--a condition which ends in painful or bleeding hemorrhoids. There are signs of impaired digestion, loss of appetite, a coated tongue, oppression after eating and flatulence, and distension of the abdomen. Headache is apt to be present, with flushing of the face and general discomfort or irritability of temper. These phenomena may all disappear within two or three days by a spontaneous stool or by the use of a purgative.

Acute symptoms of a violent nature are sometimes developed in persons who have been constipated a long or short time, in consequence of attempts at purgation or from the accumulation of indigestible food. Violent paroxysmal pains in the abdomen and efforts at stool are soon followed by symptoms of intestinal obstruction and serious collapse. Quick relief follows a free movement from the bowels obtained by an enema, or if not so relieved the case may terminate fatally.

A frequent recurrence of fecal retention from the causes mentioned will in time develop the constipated habit. Distension of the rectum increases its capacity and destroys its sensibility and expulsive power. The colon above the point of stoppage is distended with gas and weakened. The bowels are rarely moved spontaneously, and finally are never emptied without artificial aid. The literature of medicine contains many extraordinary records of prolonged fecal retention, ranging from a few weeks to many months.

The evacuations in chronic constipation are harder and more dry than they should be; they are passed in masses of various sizes, and in color are brown, black, dark-green, or yellow. Sometimes a coating of mucus is on the outside, and sometimes streaks of blood, or there is an intimate admixture of mucus, giving a slimy, gelatinous appearance to the mass. Semi-digested food, as partly-altered milk, meat, or vegetable matter, is seen, and quite frequently there is an intercurrent diarrhoea which alternates with costiveness.

The local symptoms about the pelvis and anal opening and in the lower extremities come from the pressure of accumulations of feces. Thus, compression of the iliac veins delays circulation in the lower extremities; cold feet or oedema of the feet and ankles and varicose veins follow. If the pressure is on the ilio-hypogastric and ilio-inguinal nerves, there are neuralgic pains in the groin and over the crest of the ilium. The sciatic and crural nerves may be the seats of pain. Varicocele is the effect of weight upon the spermatic veins. Erections and seminal emissions in men follow pressure on the pubic veins and prostatic portion of the urethra. Retention of urine also may come from the latter cause. If the kidneys and ureters are compressed by fecal tumors in the descending or transverse {647} colon, nephritic pain, albuminuria, or retraction of the testicle, with delay in the escape of urine, may happen. Icterus and its consequences are owing to pressure on the common bile-duct; the liver and other organs may be displaced and the aortic circulation obstructed by fecal compression. In women the retention of fecal matter in the rectum is the source of special symptoms; it contributes largely to the occurrence of cervical anti-flexion in the soft, pliable, growing uterus of girlhood (Thomas), and unites with retroversion in women who have borne children to produce great suffering.