Pyloroplasty
Definition
Pyloroplasty is a surgical procedure in which the pylorus valve at the lower portion of the stomach is cut and resutured, relaxing and widening its muscular opening (pyloric sphincter) into the duodenum (first part of the small intestine). Pyloroplasty is a treatment for patients at high risk for gastric or peptic ulcer disease (PUD).
Purpose
Pyloroplasty surgery enlarges the opening through which stomach contents are emptied into the intestine, allowing the stomach to empty more quickly. A pyloroplasty is performed to treat the complications of PUD or when medical treatment has not been able to control PUD in high-risk patients.
Description
Peptic ulcer disease develops when there is an imbalance between normal conditions that protect the lining (mucosa) of the stomach and the intestines and conditions that disrupt normal functioning of the lining. Protective factors include the water-soluble mucosal gel layer, the production of bicarbonate in the lining to balance acidity, the regulation of gastric acid (stomach acid) secretion, and blood flow in the lining. The aggressive factors that work against this protective gastric-wall system are excessive acid production, H. pylori bacterial infection, and a reduced blood flow (ischemia) in the mucosal lining. These aggressive factors can cause inflammation and ulcer development. A peptic ulcer is a type of sore or hole (perforation) that forms on the lining of the stomach (gastric ulcer) or intestine (duodenal ulcer), when the lining has been eaten away by stomach acid and digestive juices. Peptic ulcers can be primary, caused by H. pylori infection, or secondary, caused by excess acid production, stress, use of medications, and other underlying
In a pyloroplasty, an incision is made in the area that connects the stomach to the duodenum (small intestine), called the pylorus (A). The pylorus is divided laterally (B), and then stitched longitudinally (C and D), allowing for a larger connection. ( Illustration by GGS Inc. )
Conditions that disrupt the gastric environment. Although H. pylori is believed to cause the majority of all ulcers, not all people infected with it develop ulcers. In high-risk individuals, the bacteria more readily disturb the balance between good factors and destructive factors, upsetting the protective function of the stomach and intestine lining. An ulcer develops when the lining can no longer protect the organs. Secondary ulcers are usually found in the stomach; primary ulcers can be in the stomach or intestine.
Other factors that contribute to mucosal inflammation and ulceration include:
· alcohol and caffeine use
· non-steroidal anti-inflammatory drugs (NSAIDs)
· aspirin
· cigarette smoking
· exposure to certain irritating chemicals
· emotional disturbances and prolonged stress
· traumatic injuries and burns
· respiratory failure
· blood poisoning
· critical illnesses that create imbalances in body chemistry
Symptoms of gastric or peptic ulcer include burning pain, nausea, vomiting, loss of appetite, bloating, burping, and losing weight.
When PUD is diagnosed or high risk established, medical treatment will begin to treat H. pylori infection if present and to restore balanced conditions in the mucosal lining. Any underlying condition may be treated simultaneously, including respiratory disorders, fluid imbalance, or stomach and digestive disorders. Medications may be prescribed to help correct gastric disturbances and control gastric acid secretion. Certain drugs that are prescribed for other conditions, especially NSAIDs, may be discontinued if they are known to cause inflammation. Adult patients may be advised to discontinue alcohol and caffeine use and to stop smoking.
When medical treatment alone is not able to improve the conditions that cause PUD, a pyloroplasty procedure may be recommended, particularly for patients with stress ulcers, perforation of the mucosal wall, and gastric outlet obstruction. The surgery involves cutting the pylorus lengthwise and resuturing it at a right angle across the cut to relax the muscle and create a larger opening from the stomach into the intestine. The enlarged opening allows the stomach to empty more quickly. A pyloroplasty is sometimes done in conjunction with a vagotomy procedure in which the vagus nerves that stimulate stomach acid production and gastric motility (movement) are cut. This may delay gastric emptying and pyloroplasty will help correct that effect.
Diagnosis
Diagnosis begins with an accurate history of prior illnesses and existing medical conditions as well as a family history of ulcers or other gastrointestinal (stomach and intestines) disorders. A complete history and comprehensive diagnostic testing may include:
· location, frequency, duration, and severity of pain
· vomiting and description of gastric material
· bowel habits and description of stool
· all medications, including over-the-counter products
· appetite, typical diet, and weight changes
· family and social stressors
· alcohol consumption and smoking habits
· heart rate, pulse, and blood pressure
· chest examination and x ray, if necessary
· palpation (touch) of the abdomen
· rectal examination and stool testing
· pelvic examination in sexually active females
· examination of testicles and inguinal (groin) area in males
· testing for the presence of Helicobacter pylori
· complete blood count and blood chemistry profile
· urinalysis
· imaging studies of gastrointestinal system (x ray, other types of scans)
· biopsy of stomach lining using a tube-like telescopic instrument (endoscope)
Preparation
Before surgery, standard preoperative blood and urine tests will be performed and various x rays may be ordered. The patient will not be permitted to eat or drink anything after midnight the night before the procedure. When the patient is admitted to the hospital, cleansing enemas may be ordered to empty the intestine. If nausea or vomiting are present, a suction tube may be used to empty the stomach.
Aftercare
The patient will spend several hours in a recovery area after surgery where blood pressure, pulse, respiration, and temperature will be monitored. The patient's breathing may be shallower than normal because of the effect of anesthesia and the patient's reluctance to breathe deeply and experience pain at the site of the surgical incision. The patient will be shown how to support the site while breathing deeply or coughing, and will be given pain medication as needed. Fluid intake and output will be measured. The operative site will be observed for any sign of redness, swelling, or wound drainage. Intravenous fluids are usually given for 24–48 hours until the patient is gradually permitted to eat a special light diet and as bowel activity resumes. About eight hours after surgery, the patient may be allowed to walk a little, increasing movement gradually over the next few days. The average hospital stay, dependent upon the patient's overall recovery status and any underlying conditions, ranges from six to eight days.
Risks
Potential complications of this abdominal surgery include excessive bleeding, surgical wound infection, incisional hernia, recurrence of gastric ulcer, chronic diarrhea, and malnutrition. After the surgery, the surgeon should be informed of an increase in pain, and of any swelling, redness, drainage, or bleeding in the surgical area. The development of headache, muscle aches, dizziness, fever, abdominal pain or swelling, constipation, nausea or vomiting, rectal bleeding, or black stools should also be reported.
Normal results
Complete healing is expected without complications. Recovery and a return to normal activities should take from four to six weeks.
Morbidity and mortality rates
Successful treatment of Helicobacter pylori has improved morbidity and mortality rates, and the prognosis for PUD, with proper treatment and avoidance of causative factors, is excellent. Pyloroplasty is rarely performed in primary ulcer disease. Morbidity and mortality are higher in patients with secondary ulcers because of underlying illness that complicates both PUD and surgical treatment.