When the esophagus, stomach, duodenum, upper jejunum, as well as the pancreas and biliary tract and other upper gastrointestinal bleeding, the iron of hemoglobin in the red blood cells, the role of intestinal bacteria and sulfide combined into iron sulfide, thus making the feces appear black.
However, it is important to note that black tarry stools are only one typical manifestation of upper gastrointestinal bleeding. The color of the stool in upper gastrointestinal bleeding is not always tarry, but there is a big difference. For example: when the amount of bleeding is relatively small, the naked eye can not find the color of the stool changes, through a special test can be detected; when the amount of bleeding reaches 50 ml or more, the naked eye can see the color of the stool black. However, in addition to the tarry stools mentioned above, the color of the stool can also become coffee, reddish-brown or even bright red when the upper gastrointestinal bleeding.
The hardness and softness of the stool and the change in color during upper gastrointestinal bleeding depend entirely on the location of the upper gastrointestinal bleeding, the amount of bleeding, the speed of bleeding, and the time the blood stays in the intestine. If the bleeding is large, fast and stays in the intestine for a short period of time, the texture of the stool will become soft or even close to fluid, and the color can be further transformed from black to reddish brown or even bright red. Only when the amount of upper gastrointestinal bleeding is relatively small, the bleeding speed is relatively slow, bleeding in the intestinal tract stays longer, it is possible to show the typical tar-like black stool to.
After taking the medicine, the stool becomes black1, red
Phenolphthalein is an acid-base indicator, clinical treatment of chronic constipation. Most of it is excreted in its original form by the urine after oral intake. If the physical and chemical changes of the disease or eating certain foods make the urine alkaline, then the urine at this time show beautiful red, similar to hematuria.
2, red-orange
Anti-tuberculosis drug rifaximin is broken down and metabolized in the liver after oral administration, and partially excreted by the kidneys, so after taking the drug, urine and feces, sputum. Tears and sweat, all red or orange-red. In addition, the laxative rhubarb, psychotropic phenothiazines, antimalarials, such as Helium peak, after taking the drug, the urine was also varying shades of red or orange-red.
3, yellow-orange color
Vitamin B2 (riboflavin) orally involved in a variety of oxidation and reduction reactions in the body, which is indispensable in the metabolism of sugar, protein and fat, but very little storage in the body. Because of its own yellow color, when excessive by the urinary axillary excretion, so the urine was obvious dark yellow, similar to acute jaundice hepatitis when the high penumbra erythrocyanuria. In addition, berberine (yellow fever), tetracycline, senna and aloe vera, etc. will also make the urine in different shades of yellowish brown. 4, brown
Furazolidone (dysentery) after oral most of the axillary discharge from the urine, because of its metabolites in the body of the brown color, so that the urine is also brown.
The urinary tract anti-inflammatory drug furotoxin door after taking / Fl rapid decomposition into a strong brown metabolic substances, discharged by the urine, and on the urinary tract to play an anti-inflammatory and bactericidal effect, discharged urine of course, was brown.
5, blue-green
Methylene blue (blue) is the antidote to cyanide poisoning, most of the body is not metabolized after entering the body, so the excretion of the blue is still wood body. Antidepressant amitriptyline, diuretic amphotericin is also blue-green urine after long service.
6, black
Iron supplements (such as iron sulfate toes, ferric ammonium citrate) and intestinal hydrogen sulfide (stimulate intestinal peristalsis of the substance) combined to generate iron sulfide, in the intestinal bacterial products under the action of black substances, so the feces are black. At the same time, the amount of hydrogen sulfide in the intestinal tract decreases, causing intestinal peristalsis to weaken, resulting in constipation. In addition, taking medicinal charcoal, silicon carbon silver and other antidiarrheal drugs, will also make the stool black.
7, grayish-white
Gastrointestinal disease patients have to take barium orally for diagnosis, and then X-ray, the next day the stool is grayish-white or oil gray. Patients with ulcers will also have white stools or white spots after taking aluminum hydroxide gel orally. The following cases after taking the drug appeared urine and stool color color changes, is a toxic reaction or accumulation of poisoning signal, must go to the hospital, timely lifting of poisoning.
1, indomethacin
(anti-inflammatory pain) commonly used anti-inflammatory, analgesic, after a large number of long-term application of the gastrointestinal tract and the liver has a direct effect, and lead to cholestasis, which led to the emergence of green urine, but different from the above blue-green urine.
2, aspirin
After prolonged service to destroy the gastric mucosal barrier, erosion of submucosal blood vessels, can cause erosive gastric hemorrhage, leading to pharmacogenetic gastric ulcers, producing light tar-colored black feces.
3, pau d'arco
Strong nephrotoxicity, damage to the glomerular epistaxis, manifested as hematuria. It can also cause duodenal ulcers, resulting in black stools after prolonged use.
4, vitamin D, gentamicin
After long-term large-scale application, due to renal damage and hematuria, especially children and renal dysfunction is particularly obvious.
5, quinine
For particularly effective antimalarial drugs, but toxic. Its toxic reaction is acute hemolytic reaction, producing dark brown hemoglobinuria, and accompanied by fever, jaundice, anemia and renal impairment and other serious symptoms, medically known as black urine fever. The first thing you need to do is to get your hands on some of the most popular products and services in the world, and you'll be able to do that with the help of your own personal computer. In addition, elevated blood sugar, urine sugar content also increased, and increased urine sugar to provide a good environment for the growth of bacteria, will increase the chance of urinary tract infection, will also aggravate the patient's feeling of incomplete urination, and even the pain of urination, urinary urgency.