The Duodenal Ulcer Is the Chronic Recurrent Disease Which Is Characterized by Ulcer Defect on a Mucosa of the Duodenum
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Definition Peptic ulcer of a stomach and duodenum (ICD 10: K25-26)– chronic disease with polycyclic behaviour, which chracterized by secretoric, motoric and trophic modifications this organs and development ulcerous defects of its mucose. Contrary to general belief, more peptic ulcers arise in the duodenum, than in the stomach. About 4% of stomach ulcers are caused by a malignant tumor, so multiple biopsies are needed to make sure, duodenal ulcers are generally benign. Gastric ulcer The gastric ulcer is a chronic disease. The main features of peptic ulcer is the presence of ulcer defect in the mucosa. It forms the basis of pathology of many gastroenterological diseases. Such phenomenon is explained by not only considerable distribution of disease but also the dangerous complications which always accompany gastric ulcers. Etiology and pathogenesis Frequency of morbidity of the peptic ulcer among the adult population is about 4 %. It is more frequently seen patients in age group between 50 - 60 years. Disturbance between the factors of aggression and defense mechanism of mucosa leads to peptic ulcer. Etiology and pathogenesis Aggression factors: hydrochloric acid (HCl), pepsin, reverse diffusion of ions of hydrogen (H+), products of lipid hyperoxidizing. Aggressive factors (hydrochloric acid and pepsin) Parietal cells secrete hydrogen ions in concentration which is three times as high as the concentration of hydrogen ions present in the blood. Each secreted hydrogen ion combines with a chlorine ion. The final step in the secretion of hydrogen ions is performed by means of the proton pump which includes the specific K+, H+-ATPase occuring on the membranes of microvilli. This K+, H+-ATPase exchanges hydrogen for potassium across the microvillus membrane. The parietal cells produce a pure solution of HCl which mixes with the secretion of non-parietal cells. The HCl secretion is regulated by chemical, nervous and humoral factors. The membrane of parietal cells harbours specific receptors (H2- receptors) responding to histamin released from the neigbouring mast cells. Then there are receptors sensitive to muscarine effects of acetylcholine which is released by the vagus nerve’s endings. Parietal cells contain receptors which respond to endogenous circulating gastrin. Etiology and pathogenesis Defense mechanism: mucus and alkaline components of gastric juice, property of epithelium of mucosa to permanent renewal, local blood flow of mucosa and submucosa. Etiology and pathogenesis Numerous scientific developments of the past testify to the important infectious factor in the mechanism of origin of peptic ulcer, mainly, by helicobacter pylori. Etiology Scientific classification Kingdom:Bacteria Phylum:Proteobacteria Class:Epsilon Proteobacteria Order:Campylobacterales Family:Helicobacteraceae Genus:Helicobacter Species:H. pylori Binomial name Helicobacter pylori The bacterium was discovered in 1979 by Australian pathologist Robin Warren, who did further research on it with Barry Marshall beginning in 1981; they isolated the organisms from mucosal specimens from human stomachs and were the first to successfully culture them. In their original paper, Warren and Marshall contended that most stomach ulcers and gastritis were caused by infection by this bacterium and not by stress or spicy food as had been assumed before. Etiology Immunohistochemical staining of H. pylori from a gastric biopsy. H. pylori colonized on the surface of regenerative epithelium (Warthin-Starry's silver) Stomach disease An ulcer is a crater-like lesion on the skin or mucous membrane caused by an inflammatory, infectious, or malignant condition. Jonson’s classification (1965) Type I - ulcers of lesser curvature (3 cm higher than the pylorus) 13% Type II - double localization of ulcers simultaneously in the 71% stomach and duodenum Type III - ulcers of pyloric and of stomach (not farther than 3 cm from 11% the pylorus). Clinical management Pain. The pain symptom in the peptic ulcer disease is very important. There are typical staging for this disease: hunger - pain - food intake - facilitation - again hunger - pain - food intake - facilitation (so during all days). Clinical management Patients with the cardial ulcer pain arises at once after the food intake, with the ulcers of lesser curvature - in 50-60 minutes, in pyloric localization - approximately in two hours. In other patients the pain attack is accompanied by salivation. Clinical management Vomiting, the sign of disturbance of gastric motility, is the second typical symptom of gastric ulcer. More frequent gastrostasis arises as a result of failure of stomach muscul, it's atony which can be due to organ ischemia. Vomiting could arise both on empty stomach and after food intake. Clinical management Heartburn is one of the early symptoms of gastric ulcer, however in prolonged disease it can be hidden or disappear. Often it precedes pain (initial heartburn) or accompanies a pain symptom. Mostly heartburn arises after the food intake, but can appear independently. Diagnosis programme Anamnesis and physical examination. General and biochemical blood analysis. Coagulogram. Examination of gastric secretion by the method of aspiration of gastric contents. Endoscopy. Gastric pH-metry. Multi position biopsy of edges of ulcer and mucosa of stomach. Gastric Dopplerography. Sonography of abdominal cavity organs. X-Ray examination of stomach. FEGDScopy This picture displays the endoscope detecting a gastric ulcer Differential diagnosis Chronic gastritis, like gastric ulcer is characterized by the pain syndrome, that arises after the food intake. In such patients it is possible to observe nausea and vomiting of gastric content, heartburn and belching. However, unlike gastric ulcer, in gastritis typical symptom of "quick satiation by food is seen. Unsteady emptying, diarrhea are also more inherent to gastritis. In gastric ulcer frequently the delay in gastric empting leads to constipation for 4-5 days. Differential diagnosis The cancer of stomach, it is comparative with gastric ulcer, has considerably more short anamnesis. The most typical clinical signs of this pathology are: absence of appetite, weight loss, rapid fatigability, depression, unsociability, apathy. In such patients X-Ray examination expose the "defect of filling", related to exophytic tumor and deformation of walls of organ. A final diagnosis is set after the results of multi position biopsy of shady areas of mucosa of stomach. Tactic and choice of treatment method Conservative treatment of gastric ulcer always must be complex, individually differentiated, according to the etiology. Conservative therapy must include: anticholinergic drugs (atropine, methacin, platyphyllin) and myolitics (papaverine, halidor, nospanum); antiacid drugs - in accordance with the results of pH-metry; Conservative therapy Proton pump inhibitors: These drugs are potent inhibitors of H+,K+-ATPase. This enzyme, located in the apical secretory membrane of the parietal cell, plays a key role in the secretion of H+ (protons). These drugs can completely inhibit acid secretion and have a long duration of action. They promote ulcer healing and are also key components of H. pylori eradication regimens. Proton pump inhibitors have replaced H2-blockers in most clinical situations because of greater rapidity of action and efficacy. Conservative therapy Proton pump inhibitors include esomeprazole (NEXIUM), lansoprazole (PREVACID), and pantoprazole (PROTONIX) , all available orally and IV, and omeprazole (PRILOSEC) and rabeprazole, available only orally in the US. Omeprazole (PRILOSEC) is available without a prescription in the US. Long-term proton pump inhibitor therapy produces elevated gastrin levels, which lead to enterochromaffin- like cell hyperplasia. However, there is no evidence of dysplasia or malignant transformation in patients receiving this treatment. Some may develop vitamin B12 malabsorption. Conservative therapy H2 blockers: These drugs cimetidine (TAGAMET), , ranitidine (ZANTAC), famotidine (PEPCID), , available IV and orally; and nizatidine (AXID) (available orally) are competitive inhibitors of histamine at the H2 receptor, thus suppressing gastrin- stimulated acid secretion and proportionately reducing gastric juice volume. Histamine- mediated pepsin secretion is also decreased. Conservative therapy H2 blockers are well absorbed from the GI tract, with onset of action 30 to 60 min after ingestion and peak effects at 1 to 2 h. IV administration produces a more rapid onset of action. Duration of action is proportional to dose and ranges from 6 to 20 h. Doses should often be reduced in elderly patients. Conservative therapy For duodenal ulcers, once daily oral administration of cimetidine 800 mg, ranitidine 300 mg, famotidine 40 mg, or nizatidine 300 mg given at bedtime or after dinner for 6 to 8 wk is effective. Gastric ulcers may respond to the same regimen continued for 8 to 12 wk, but because nocturnal acid secretion is less important, morning administration may be equally or more effective. Children ≥ 40 kg may receive adult doses. Below that weight, the oral dosage is ranitidine 2 mg/kg q 12 h and cimetidine 10 mg/kg q 12 h. For GERD, H2 blockers are now mostly used for pain management. Gastritis heals with famotidine or ranitidine given bid for 8 to 12 wk. Conservative therapy Cimetidine and, to a lesser extent, other H2- blockers interact with the P-450 microsomal enzyme system and may delay metabolism