The widespread use of laparoscopic obesity surgery has left both emergency physicians and general surgeons faced with acute and chronic complications of bariatric surgery. Patients who have undergone bariatric surgery should take a phased approach should they encounter any emergency.
Resuscitation attempts are the same as for patients who have not undergone bariatric surgery. Therefore, consultation with a bariatric surgeon should be provided early. Surgery-specific complications must be taken into consideration in the differential diagnosis.
APPROACH TO THE PATIENT UNDERGOING OBESITY SURGERY
Acute band slippage is one of the most common complications of gastric banding (clamp). Before making diagnoses such as “stomach cold” and “food poisoning” in a band patient who complains of pain and vomiting, it must be proven that this complication does not exist. Sleeve gastrectomy and gastric bypass surgeries; It carries the risk of complications such as stapler leakage or bleeding in the stapler line, which can be life-threatening.
Gastric bypass and biliopancreatic diversion surgeries carry risks such as bleeding, perforation or serious stenosis, especially marginal ulcer in the anastomosis line. Intestinal obstructions may occur due to internal hernias, sometimes trocar site hernias, intussusception (obstruction as a result of the intestine herniating into itself), adhesions, folds and clots.
In case of any emergency, ABC (Airway – Breathing and Circulation) principles should be followed during intervention to the bariatric patient. A patient history about the bariatric procedure performed is essential. However, consultation with a bariatric surgeon must be ensured during the evaluation.
Often patients are unaware of the details of the surgical procedure they have undergone. Knowing the bariatric procedure is the basis for focusing and making a diagnosis.
Disturbance in vital signs should bring to mind the possibility of pulmonary embolism and sepsis. The most common cause of death among bariatric surgery patients is pulmonary embolism. Many cases of venous thromboembolism also develop after discharge from the hospital. Fever, low blood pressure, tachycardia, decreased urine output, tachypnea and hypoxia are the most important symptoms of infection. These symptoms should alert the physician about the causes of infection-sepsis caused by bariatric surgery. Therefore, information about the surgery will be a guide in the differential diagnosis of procedure-related septic complications.
Complaints such as abdominal pain, nausea and vomiting, especially digestive system bleeding, are among the complications specific to the surgery. Symptoms of dehydration, that is, not being able to take in enough fluid or compensate for the loss, are tachycardia, dry skin, pale mucous membranes and a decrease in the amount of urine. Resuscitation should be initiated immediately with appropriate glucose-free fluids.
Since these patients often show atypical features, they require special attention in the evaluation of signs and symptoms. Full recumbent position should be avoided as excess skin and fatty tissue will cause breathing problems. If endotracheal tube placement is required, the anesthesiologist should be alert to potential intubation difficulties. It should not be forgotten that the anatomy of the upper digestive system changes when placing a nasogastric or orogastric tube.
Specific Acute Complications After Laparoscopic Adjustable Gastric Banding
Laparoscopic gastric band surgery is one of the most commonly used methods in the world. The probability of complications is quite low in the short and medium term. However, long-term data indicate a higher incidence of postoperative complications leading to band repositioning or removal. The major complications are band slippage, acute or chronic pouch dilatation, erosion, and permanent or recurrent outflow obstruction.
Band Slippage: The most common adjustable gastric band complication is slippage. Band shift; Chronic pouch dilatation manifests itself as gradually progressing symptoms of food intolerance, dysphagia, decreased feeling of satiety and restriction. Acute band slippage is characterized by persistent abdominal pain, vomiting and obstruction symptoms. Radiological diagnosis can be easily made by distorting the orientation of the band on the plain abdominal radiograph. Nausea, vomiting and restriction of oral intake can lead to severe dehydration with changes in cardiovascular status and vital signs.
Gastric Obstruction: Obstruction caused by a poorly chewed and quickly swallowed bite can lead to acute and persistent dysphagia. This condition is treated conservatively, similar to acute band slippage. If treatment is successful, the patient is directed to receive nutritional support and see his or her bariatric surgeon.
Complicated Intragastric Band Migration
Band migration can usually be detected during radiological or endoscopic controls. Although normally a chronic complication, port infections usually begin in the first months of surgery. Trauma to the posterior wall of the stomach during surgery and tight band placement may be the cause of early erosions.
Removing the tape; It is mandatory due to complications such as bleeding or perforation. When signs of acute port infection such as redness, swelling, abscess or fistula formation are observed at the port site, if there is an abscess, it should be drained urgently and the patient should be referred to the bariatric center for further examination and treatment.
Specific Acute Complications After Laparoscopic Sleeve Gastrectomy (Stomach Tube) Surgery
Sleeve gastrectomy surgery, which has been used for many years as the first step of biliopancreatic diversion and duodenal switch surgery, is now considered a stand-alone procedure. Laparoscopic Sleeve Gastrectomy is the most popular bariatric surgery method performed today.
Early complications arising from the stapler line are rare but the most feared complications. Today, many surgical procedures, including sleeve gastrectomy, can be performed as standard.
Stapler Line Leaks
Leak rates after laparoscopic sleeve gastrectomy vary depending on study series and patient characteristics. Signs of local or widespread peritonitis seen in a patient who has recently undergone bariatric surgery are likely due to a late fistula. In all suspicious cases, tomography should be performed.
The tomography to be taken usually shows three possible pictures;
High level staple line fistula and left subdiaphragmatic fluid accumulation at the esophagogastric junction
Perigastric fluid accumulation in the perigastric fat tissue close to the stapler line without air bubbles and contrast material leakage
Multiple leaks and widespread fluid accumulation
Leaks are successfully treated with a wide variety of interventions performed on the patient using endoscopic methods and catheters placed through the skin under computerized tomography. The most important reason for failure here is delay in diagnosis and late treatment. Delay in diagnosis may occur due to poor patient follow-up, or due to the patient’s own negligence, escaping control, or not coming to the surgeon who performed the surgery for a check-up. Therefore, it is vital that these surgeries are performed by teams that take care of their work, complete post-operative follow-up and treatment, and have the ability and experience to perform all kinds of interventions after diagnosis. Many methods are used endoscopically, such as gastric clip (OTSC), esophagoduodenal stent, internal drainage, and pylorus botox application. In this way, leaks are closed in 6-8 weeks. Sleeve leaks that cannot be corrected by endoscopic method should be corrected by surgery. For this purpose, primary repair, conversion to bypass surgery, fistulojejunostomy and total gastrectomy surgeries are treatment options. The important point here is to make the diagnosis early and start the treatment as soon as possible.
Stenosis After Gastric Sleeve
Sleeve gastrectomy calibration through a very narrow tube leads to the development of mid-gastric stenosis at a rate of 4 percent. In these patients, persistent vomiting and food intolerance can often be observed. After conservative treatment of dehydration, patients should be referred to the bariatric center for endoscopic dilation. Generally, 3-4 endoscopic dilatations that do not require hospitalization are sufficient. In case of unsuccessful dilatation, effective gastric bypass revision may be required.
Specific Acute Complications That May Occur After Gastric Bypass
Gastric bypass is considered the gold standard in the surgical treatment of morbid obesity, especially in America. Using linear staplers, a small gastric pouch with a volume of 25-30 ml is created just below the esophagus.
Anastomotic Leak
Anastomotic leakage after gastric bypass is also considered a life-threatening complication. Early or late leakage may present a clinical picture ranging from subclinical leakage to sepsis. During the diagnosis phase, passage film with gastrografin, tomography and blood count should be performed.
Emergency surgical treatment should be considered in hemodynamically unstable patients with severe and persistent symptoms. The abdomen should be washed extensively and multiple drains should be placed. Compared to sleeve gastrectomy, bypass leaks are closed much faster and easier since the pressure in the anastomosis area is lower.
Complicated Marginal Ulcer
Marginal ulcer is a peptic ulcer that occurs in the mucosa at the edge of the gastrojejunal anastomosis. It can be seen early (1-3 months) or late after gastric bypass.
The most common symptoms are pain and bleeding.
Specific acute complications after biliopancreatic diversion and duodenal switch
Biliopancreatic diversion is the most effective bariatric metabolic procedure compared to other techniques. Due to the anatomical and physiological changes that occur in their digestive systems, these patients require special attention, especially in emergency situations.
Many complications are situations that are noted at the beginning and require a general surgeon’s attention in the emergency room. It is often possible to stabilize patients for transfer to a bariatric center.
Specific Acute Complications After Laparoscopic Gastric Plication
Gastric plication (stomach folding) is an operation that has begun to be abandoned today due to its unsuccessful results and high rates of weight regain. Knowledge and experience regarding the management of its complications is limited.Gastric obstruction is the most common reason for reoperation. Conservative treatment (anti-edema and stomach-protecting drugs) can be tried initially. If vomiting does not improve, the layer causing the obstruction should be opened by endoscopy.
Acute Complications Unrelated to Surgery Type
Bleeding: Bleeding may result from staple lines or another focus. Trocar site bleeding, spleen injury, or retractor-related liver injury are rare but possible sources of bleeding. These complications usually occur within the first 48 hours after surgery. During this process, the patient is usually under the supervision of the bariatric center.
If the endoscopist has sufficient experience and is accustomed to the anatomical changes created by bariatric surgery; Endoscopy can help find the bleeding focus on the inside of the staple line and stop it with adrenaline injection, electrocoagulation or endoclips.
Small Bowel Obstructions After Bariatric Surgeries: One of the most common situations that general surgeons and emergency physicians encounter is the evaluation and treatment of small bowel obstructions.The standard approach algorithm for small bowel obstructions begins with nonsurgical approaches such as nasogastric decompression, bowel rest, fluid resuscitation, and close monitoring. Most patients can be treated with these conservative approaches unless there are signs of vascular malnutrition.
Trocar site hernias are an uncommon complication of laparoscopic surgery. However, it should be taken into consideration that high BMI values create a significant risk factor and this possibility is higher in bariatric patients. Diagnosis can be made by clinical findings, plain abdominal radiographs and upper digestive system examinations.
Gallbladder and Tract Stones After Bariatric Surgery: Gallstones are usually seen in the first 6 months after surgery.Gallstones presenting with symptoms such as acute cholecystitis in a patient with a history of bariatric surgery do not pose a problem for a general surgeon. Diagnosis can be made by ultrasound, tomography or MR-cholangiography. When common bile duct obstruction is detected, endoscopic or surgical treatment depends entirely on the surgeon’s experience and the patient’s condition.
Gastro-esophageal Reflux Disease After Bariatric Surgery: Patients who have undergone bariatric surgery may present to the emergency department with severe epigastric pain, burning pain in the chest, or chest pain. Severe gastroesophageal burning may occur at a high rate. This condition is often due to reflux disease that is overlooked before bariatric surgery.
Aggressive dissection and closure of the hiatal defect are very important for hiatal hernia during surgery. Reflux symptoms after sleeve gastrectomy usually occur in the first postoperative year. The second peak of reflux may occur at a later stage. Proton pump inhibitor drugs constitute the first step of treatment in patients with new-onset gastroesophageal reflux symptoms after sleeve gastrectomy. In such a case, the patient should be referred to a bariatric center whenever possible.