Peptic ulcer Pathogenesis: 1. For both Duodenal & Gastric Ulcers: a. Infection w/ H. pylori: Decreases resistance of mucus layer from acid permeation (hydrophobicity) Increase acid secretion Slow duodenal emptying Reduced both duodenal and gastric bicarbonate secretion
Clinical Manifestation 1. Abdominal pain: – Due to irritation of afferent nerves w/in the ulcer by the acid or due to peristaltic waves passing through the ulcer Duodenal: colicky or burning pain relieved w/ food intake Gastric: gnawing or burning usually during or after eating. 2. N/V 3. Weight loss 4. Epigastric tenderness
Peptic ulcer Pathogenesis: b. Effects of NSAIDs Decreases Prostagladin Prostaglandin – inhibits acid secretion, stimulates mucus and HCO3 secretion and mucosal blood flow c. Zollinger-Ellison Syndrome (1%): Massive secretion of HCL due to ectopic gastrin production from non-beta islet cell tumor (gastrinoma) Associated w/ type I (MEN) PPP 20% multiple, 2/3 malignant, w/ slow growing Parietal cell mass is increased > gastrin 3-6 x the normal
Symptoms of gastric ulcer disease: epigastric pain after meal or during meal upper dyspeptic syndrome – loss of appetite, nauzea, vomiting, flatulence vomiting brings relief reduced nutrition loss of weight
Zeman, M. et al., Speciální chirurgie, ISBN 80-7262-260-9, 2004 Vagotomy
Treatment Primarily medical – PPI or H2 blocker – Triple combination (double antibiotic and PPI=amoxicillin, clarithromycin, pantoprazole for 7-14 days) Surgical indications – Intractibility (after medical therapy) – Hemorrhage – Obstruction – Perforation – Relative: continuous requirement of steroid therapy/NSAIDs
Treatment: Mechanism of Pharmacologic Therapy: 4. For eradication of H. pylori: a. Bismuth based triple therapy Bismuth + Tetracycline + Metronidazole b. Proton pump inhibitor Omeprazole + Amoxicillin/Clarithromycin + metronidazole
Treatment: Surgical Treatment: Indication: 1. Intractability: – Highly selective vagotomy Low septic complication, (-) dumping and diarrhea – For gastric ulcer: Total or subtotal gastrectomy w/ or w/o vagotomy
Zeman, M. et al., Speciální chirurgie, ISBN 80-7262-260-9, 2004 A – penetrationB – perforation C – bleedingD - stenosis
Elective Surgical Therapy Rare; most uncomplicated ulcers heal within 12 weeks If don’t, change medication, observe addition 12 weeks Check serum gastrin (antral G-cell hyperplasia or gastrinoma) EGD: biopsy all 4 quadrants of ulcer (rule out malignant ulcer) if refractory
Modified Johnson Classification TypeLocationAcid Hypersecretion ILesser curvature, incisuraNo IIBody of stomach, incisura, and duodenal ulcer (active or healed) Yes IIIPrepyloricYes IVHigh on lesser curve, near gastroesophageal junction No VAnywhere (medication induced)No
Type 2/3 Ulcers Acid hypersecretion Antrectomy with ulcer and bilateral truncal vagotomy Billroth II or Billroth I depending on technical difficulty Parietal cell vagotomy option but higher recurrence
Type 4 Ulcers Least common (5% of all gastric ulcers) Ulcers 2-5cm from cardia can be treated with distal gastrectomy, extending resection along the lesser curvature and BI (Pauchet/Shoemaker procedure) Ulcers closer to GEJ, tongue-shaped resection high onto lesser curve (Csendes’ procedure with Roux-en-Y reconstruction) Cardia
CSENDES RESECTION (Line of transection; Roux-en-Y anastomosis)
Giant gastric ulcer: >3cm; 30% malignancy risk Subtotal gastrectomy with Roux-en-Y (high morbidity and mortality) Kelling-Madlener procedure: less aggressive, antrectomy, BI reconstruction, bilateral truncal vagotomy, leave ulcer, multiple biopsies, cautery of ulcer
Complications after stomach resection: Early – dehiscence, stenosis of anastomosis, bleeding, pancreatitis, obstructive icterus, affection of neighbour tissues Late - days, weeks - early dumping syndrome - late dumping syndrome - incoming crankle syndrome - outcoming crankle syndrome - ulcer in anastomosis or in outcoming crankle
Early Complications (1) 1. Failure of the stomach or stomach remnant to empty occurs after any procedure. It was formerly common after vagotomy and drainage. Causes are: A. Prolonged paralysis of stomach (doubtful) B. Edema at a stoma C. Fluid and electrolyte disorder, especially hypokalaemia. Management is conservative with NG suction, fluid, electrolyte and nutritional replacement.
Early Complications (2) 2. Intestinal obstruction. Causes are: A. Adhesive. B. As a consequences: (a) Twisting of the loop of a gastrojejunostomy after polya gastrectomy. (b) Herniation of loops through a mesenteric defect. (c) Retrograde intussusception of the efferent loop of a gastrojejunostomy (rare). Prophylaxis: avoid causes – such as mesenteric cul de sacs or holes Treatment: operative
Early Complications (3) 3. Fistulae. Can occur after any operation, which involves a suture line. Most usual sites are: 1. After polya gastrectomy i. Duodenal stump ii. Pancreases from trying to dissect out a difficult ulcer 2. Occasionally at a Pyloroplasty
Early Complications (4) 4. Acute pancreatitis. May follow any procedure. Its etiology is unknown, but some cases are traumatic
Late Complications (1) 1. Anastomotic and recurrent ulceration Causes: a. Inadequate resection of parietal cell mass. b. Isolated antrum left after polya gastrectomy. c. Zollinger – Ellison syndrome. d. Incomplete vagotmy. e. Persistent suture in the anastomosis. More usually this is merely a suture exposed as a consequence of ulceration from another cause. Prophylaxis: adequate primary treatment. Management is related to cause and requires investigation to ascertain the level of acid secretion or the completeness of vagotomy. Recurrence after vagotomy is best managed by polya gastrectomy.
Late Complications (1) 2. Gastrojejunocolic fistulae. Occurs when a recurrent ulcer after gastrojejual anastomosis penetrates into the colon. It should arouse the suspicion of Zollinger-Ellison syndrome. Clinical features: Severe diarrhea occurs due to enteritis caused by cronic contents passing directly into the small bowel and acidosis, dehydration, potassium loss, anaemia and cachexia will result in death if the fastula is not interrupted surgically. Treatment: 1. Good risk patient. Excision of the gastric, jejunal and colonic components and the construction of a higher gastrectomy. 2. Poor risk patient. A staged procedure: (a) Stage 1: Proximal colostomy which, diverts the faecal stream from the fistula and thus stops the enteritis. (b) Stage 2: Excision of fistula and its visceral components and the construction of a higher gastrectomy and colonic anastomosis. (c) Stage 3: Closure of colostomy.
Early dumping syndrome: group of symptoms approved shortly after meal appears after BII resection vasomotoric sy. - face redness, fall of blood pressure, dizziness GI sy. - vomiting, diarrhoea Th.: diet, no sugar, low quantities of food, change BII to BI resection
Late dumping syndrome: Late dumping syndrome: hypoglycaemia (sugar is not enough digested) appears after BII resection weakness, perspiration, dizziness, tremor cca 3h after meal Th.: no sugar, change BII to BI resection
Anemia Partial gastrectomy and polya reconstruction interferes with duodenal absorption of iron and a macrocytic anemia may result More rarely, sufficient stomach has been removed to cause failure of release of intrinsic factor and thus a macrocytic anemia Malnutrition may contribute to both.
Weight loss and its complications Particulary after partial gastrectomy when patients are unwilling to eat sufficiently, weight loss is common Severe malnutrition is rare, but there is an increased risk of nutrition-associated diseases such as tuberculosis.
Bilious vomiting Any operation which, destroys or bypasses the pylorus allows bile to reach the stomach. Not only does this produce atrophic gastritis but also it may be associated with bilious vomiting. This is more likely after a polya gastrectomy where characteristically a patient eats a meal and some to 10 to 20 minutes later vomits bile only. In severe cases, either normal anatomy should be restored or the bile diverted more distally into the intestine.
Diarrhea Apart from the dumping syndrome, all vagotomies except highly selective ones seem to cause diarrhea Matters are made worse if cholecystectomy has been done or is subsequently done
Acute Gastritis (erosive) Stress erosions are usually multiple, small punctuate lesion in the proximal acid secreting portion of the stomach Clinical Settings: 1. Severe illness, trauma, burns (Cushing ulcer) or sepsis – Due to (-) mucosal defense (ischemia) 2. Drug and Chemical ingestion – Aspirin / NSAIDs 3. CNS trauma: – Increase gastrin ---> elevated acid secretion – Curling ulcer
Acute Gastritis Treatment: – NPO – NGT / Saline lavage – Antacids / omeprazole / sucralfate – Intra-arterial infusion of vasopressin – Surgery --> if 6-8 units over 24 hrs Mortality ---> 40% 1. Near total gastrectomy 2. Vagotomy + pyloroplasty + over sewing of bleeder 3. Partial gastrectomy + vagotomy
Zollinger-Ellison Syndrome (Gastrinoma) Symptoms tends to be more severe, unrelenting and less responsive to therapy. Clinical Manifestation: 1. Pain 2. Diarrhea 3. Steatorrhea Diagnosis: 1. Acid secreting studies (50meq/hr) 2. UGIS 3. Radio-immuno assay for serum Gastrin level Diff: a) Pernicious anemia b) Renal insufficiency c) Antral gastrin hyperplasia or hyperfunction 4. CT scan and angiography to localize gastrinoma 5. Venous sampling