Audio-Digest Foundation: general-surgery

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Audio-Digest FoundationGeneral Surgery


Volume 55, Issue 08
April 21, 2008

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UPPER GI SURGERY

CURRENT SURGICAL THERAPY FOR GERD—Jeffrey H. Peters, MD, Seymour I. Schwartz Professor and Chair, Department of Surgery, University of Rochester School of Medicine and Dentistry, and Surgeon-in-Chief, Strong Memorial Hospital, Rochester, NY
Introduction: most patients referred for surgery for gastroesophageal reflux disease (GERD) have had trial of proton pump inhibitor (PPI) and wish to try another form of treatment; patients fall into 3 categories (acid symptoms; nonacid or volume symptoms; no symptoms related to GERD)
Predictors of success after laparoscopic Nissen fundoplication: 1999 study found most significant predictor of success in relieving symptoms positive 24-hr pH test score (3 greatest predictors pH score, typical symptoms, and good response to medical therapy); shown that certain factors (eg, presence or absence of defective lower esophageal sphincter [LES]) not as important in patient selection and outcome as originally thought
Total Nissen fundoplication: gold standard; most other options (eg, partial fundoplication, Collis gastroplasty) not as effective; as shown in studies (Pellegrini et al), procedure does not need to be modified for individual patients as much as originally thought
Role of symptoms: understand cause and type of symptoms before taking patient to operating room (OR); characterization of symptoms vital to outcome; most patients with GERD present with multiple symptoms of gastrointestinal (GI) disease, some of which are not caused by reflux and will remain after surgery
Patients with complex scenarios: more difficult to manage surgically (and perhaps not good candidates) than typical reflux patient; include patients with stricture or shortened esophagus, severe motility disorders that can be named or absent motility, intrathoracic stomach, severe gastric abnormalities, or patients undergoing reoperation for failed repair
Technical components of Nissen fundoplication: becoming more standardized over time (eg, mobilization of fundus); technical issues still cause failure (study by Swanstrom et al found 22 of 145 patients who underwent reoperation had technical reason for failure of initial procedure); think of fundoplication as hernia operation (majority, if not all, antireflux surgery patients have hernias; correcting hernia important part of technique and may be important component of side effects that occur with procedure)
Keys to success: near certainty that reflux source of symptoms for which surgery being performed; differentiate symptoms based on likelihood of being secondary to GERD; explain to patient which symptoms can be resolved with surgery and which cannot; consider possibility of severe disease and complex physiology and anatomy (exercise extra caution under such circumstances); carefully perform standardized technique; if patient returns with recurrent symptoms, important to document (through endoscopy and pH probe) presence or absence of reflux and that symptoms unrelated to reflux
Physiology of Nissen fundoplication: operation stops reflux (as measured by pH score or impedance study) in almost 100% of cases; fundoplication has been shown to restore distensive characteristics of gastroesophageal junction (GEJ) opening (too loose to transfer fluid from stomach to esophagus in patient with GERD) and flow rates through GEJ to normal; however, study from Europe found fundoplication can also cause impairment and delay in transit time of liquids and solids across GEJ; in most patients with reflux (compared to normal patients), gastric fundus distends more after eating and resolves less; fundoplication restores this function to “more than normal”
Long-term outcomes after Nissen fundoplication: at 5 yr (Australian study)—87% of patients had no or minimal heartburn; 10% back on acid suppressing medications; at 10 yr (Dallemagne et al)—92% free of reflux symptoms (results with partial fundoplication less satisfactory)
Utilization of fundoplication: prevalence of severe GERD in United States, 3%; however, annual rate of antireflux surgery, 0.00012% (12 of every 100,000 patients); study (Liu and Birkmeyer) on appropriate threshold for surgery for GERD concluded that in 50% of cases of relatively severe GERD, antireflux surgery should be seriously considered
REASONS FOR FAILURE OF ANTIREFLUX SURGERY —Lee Swanstrom, MD, Clinical Professor, Department of Surgery, Oregon Health Sciences University; Director, Division of Minimally Invasive Surgery, Legacy Health System; and Director, Legacy/OHSU Surgical Endoscopy and Laparoscopy Postgraduate Fellowship Program, Portland, OR
Introduction: substantial number of fundoplications reoperative; typical case scenario (sorting out which symptoms treatable and untreatable, helping patient adjust to untreatable symptoms, and identifying those that can be resolved)
Indicators of failed fundoplication: residual or recurrent symptoms; signs of wrap herniation or disruption; abnormal postoperative 24-hr pH test; dysphagia worse or unimproved after surgery; not indicators of failure—side effects of surgery; continued use of peptic medications; symptoms alone (recent study found 66% of patients who complain of GERD symptoms after surgery have normal 24-hr pH test; 9% of patients with no symptoms have positive 24-hr pH test); if patient returns with residual or recurrent symptoms, physician’s first step to get 24-hr pH test (to establish whether surgery has failed)
Why fundoplications fail: cause of failure typically multifactorial; reasons include wrong surgeon, wrong procedure, choosing wrong patient, and technical errors
Risk for recurrence: when presenting for first-time antireflux surgery, all patients should be warned of possibility of recurrence; some patients at high risk for recurrence (eg, substantial failure rate seen in surgery for large paraesophageal hernia); patient with recurrent symptoms who comes in for repeat surgery at high risk for further recurrences and must be warned that second or third operations not as successful as initial surgeries
Mechanical problems (modes of failure): malpositioning of wrap; residual reflux through intact wrap (eg, in patients who have had partial fundoplication); wrap disruption or herniation (resulting from repair under tension); most common finding in cases of recurrence, herniation (either slippage or wrap herniating up into mediastinum)
Reasons for failure (repairs under tension): torsion of wrap (prevented by division of short gastric vessels during fundoplication); fundoplication made too loose; axial shortening (short esophagus rare, but possible)
Indications for repeat antireflux surgery: daily symptoms requiring long-term medical treatment (patients with minor symptoms not candidates for reoperation, which is more complicated procedure with possibility of exacerbating, rather than improving, symptoms); recurrence of complications of GERD; objective confirmation of failure necessary; avoid surgery in patients with underlying psychologic problems
Preoperative evaluation: thorough medical evaluation critical; comprehensive evaluation of esophageal physiology—upper GI series; endoscopy; 24-hr pH test; motility testing; gastric emptying study; if tests normal, do not hesitate to forgo surgery (“if there’s nothing mechanically wrong, then there’s no sense operating”); other options available
Short esophagus: uncommon; risk factors include long-standing severe disease, strictures, GEJ >5 cm above hiatus, Barrett’s syndrome, and recurrence; most patients can be treated laparoscopically (transhiatal dissection achieves esophageal mobilization in majority of cases); in cases of reoperation, especially, surgeon should be prepared and able to do Collis gastroplasty
Recurrence of paraesophageal hernia (PEH): PEH different disease (disease of diaphragm; familial/genetic; high recurrence rates); patients at risk of needing Collis gastroplasty; mesh important component of repair (use of biologic mesh shown to dramatically reduce recurrence of PEHs; plastic mesh not recommended); when reoperating for PEH, relaxing incision needed; early on, speaker tried wrapping esophagus circumferentially; however, he quickly found that whichever mesh used caused stricturing and problems with esophagus (thus wrap should not be circumferential); more common now to use U-shaped piece of mesh to cover repair
Endoluminal treatments: in patients who have breakthrough reflux after laparoscopic antireflux surgery, endoluminal treatment effective (works well, success rate high, and good way to salvage these patients)
Results of reoperative antireflux surgery: of all antireflux surgeries, reoperative cases have worst outcomes (outcome excellent after first procedure, but patients who need repeat operations have much worse objective outcomes, ie, higher failure rates); outcome continues to worsen as recurrences continue, so by third or fourth surgery, failure rate 50% to 60%; such patients end up needing radical surgery (eg, esophagectomy, gastrectomy), which is associated with greater morbidity; once patients require third or fourth surgery, discomfort and GI problems greatly increase as well (even when results after surgery good, patients tend to have more gas, more diarrhea, and more dyspepsia than after initial procedure)
SURGICAL MANAGEMENT OF UPPER GI EMERGENCIES —Charles E. Lucas, MD, Professor of Surgery, Wayne State University School of Medicine, Detroit, MI
Introduction: definitions—minor GI bleeding (stable vital signs, hemoglobin, and hematocrit); moderate bleeding (tachycardia with 10% decrease in hematocrit); massive bleeding (hypotension or visible active bleeding during endoscopy); natural history that most bleeding stops; however, some situations in which bleeding will not stop or rebleeding expected after initial stoppage; widespread administration of warfarin (eg, Coumadin) and clopidogrel (Plavix) has led to higher incidence of coagulopathy in patients presenting with acute upper and lower GI bleeding; patients with continued bleeding require urgent endoscopic assessment or urgent operative intervention with hemostasis
Managing patients who present with acute bleeding: go through all steps of resuscitation; important to identify coagulopathy and correct with fresh frozen plasma (FFP); initial resuscitation should include interference with acid secretion (mostly done with histamine type 2 [H2 ] blockers, but use of PPIs increasing); in cases of serious bleeding, prepare patients for early endoscopy (data show that early assessment reduces length of stay, time in intensive care unit [ICU], and mortality); need for surgical hemostasis mostly eliminated; in cases of refractory bleeding, in which patient requires immediate surgery, bring endoscopist into OR
Comments: at Detroit Medical Center, most common category of bleeding “the itises”; usually caused by alcohol abuse (in other hospitals, NSAIDs implicated as well); important area of advancement in last 30 yr prevention of so-called stress bleeding with H2 blockade or PPIs; current “leap-frog criteria” for managing critical care include gastric prophylaxis with H2 blocker; these criteria do not include monitoring of gastric pH, which speaker considers mistake; speaker recommends that, in critical care unit, medical student or resident be appointed to measure pH each morning in all patients with nasogastric (NG) tubes to determine whether they are outside range of pepsinogen conversion to pepsin (very important; in time, will become standard in ICUs)
Mallory-Weiss syndrome: typically, patient has had too much to drink, vomited, and then had problems related to hematemesis 30 min after initial vomiting; when patient resuscitated, blood still seen in NG aspirate; longitudinal tear along lesser curvature of stomach visible via endoscopy; tear can be made hemostatic by using heater probe (important to utilize endoscopist in these cases; eliminates need for surgery in majority of patients)
Bleeding from gastroesophageal varices: usually associated with alcohol abuse, hepatitis C, or combination; patients almost always present in coagulopathic state; initiate FFP, then transfer patient to endoscopy suite for band ligation or injection therapy; transjugular intrahepatic portosystemic shunt (TIPS) procedure popular in 1980s, but associated with high incidence of encephalopathy; if surgery necessary, speaker prefers EndoSite 3Di Digital Vision System portacaval shunt; devascularization (accomplished by doing splenectomy, ligation of right and left gastroepiploic vessels and right gastric vessels, and omentectomy) has excellent rate of stopping bleeding without causing problems of portal encephalopathy
Portal gastrorrhaphy: sometimes seen in patients with severe cirrhosis who continue drinking alcohol; causes refractory bleeding from stomach (patients continue to bleed as long as they continue to drink); treatment portosystemic shunt by TIPS procedure, or in rare cases, total gastrectomy
Varices along greater curvature of stomach: extremely unusual cause of upper GI bleeding; usually misdiagnosed and mistreated when first seen; typically associated with pancreatitis with or without pseudocysts and often associated with additional splenic venous thrombosis; also seen (rarely) in patients who have had arteriovenous fistula; treatment splenectomy and devascularization of greater curvature of stomach (by taking down right and left gastroepiploic vessels and inverting greater curvature)
Bleeding duodenal ulcer: common source of GI bleeding that may require surgery; typical approach to make upper midline incision, then do gastroduodenotomy, pyloroplasty, and truncal vagotomy; 1- or 2-layer closure acceptable (but important that it be brought together without tension and be secure)
Patient rebleeding from duodenal ulcer: surgeon must do distal resection (incorporating ulcer); procedure can be difficult (requires carefully dissecting ulcer off pancreas); be “a bit paranoid” when doing gastrectomy for deep bleeding duodenal ulcer; if stump “very bad,” also do tube duodenostomy; speaker has had 2 cases in which third operation (Whipple procedure) necessary to control bleeding
Bleeding prepyloric ulcer: approach similar to duodenal ulcer, except surgery consists of antrectomy and Billroth I reconstruction; since ulcer also acid-stimulated (by way of vagus nerve), also perform vagotomy; antrum represents only 20% of surface area of stomach, therefore large gastrectomy not necessary for true antrectomy

Suggested Reading

Abraldes JG, Bosch J: The treatment of acute variceal bleeding. J Clin Gastroenterol 41:S312, 2007; Blom D et al: Physiologic mechanism and preoperative prediction of new-onset dysphagia after laparoscopic Nissen fundoplication. J Gastrointest Surg 6:22, 2002; Byrne JP et al: Symptomatic and functional outcome after laparoscopic reoperation for failed antireflux surgery. Br J Surg 92:996, 2005; Dallemagne B et al: Clinical results of laparoscopic fundoplication at ten years after surgery. Surg Endosc 20:159, 2006; Donkervoort SC et al: Impact of anatomical wrap position on the outcome of Nissen fundoplication. Br J Surg 90:854, 2003; Finlayson SR et al: Trends in surgery for gastroesophageal reflux disease: the effect of laparoscopic surgery on utilization. Surgery 133:147, 2003; Hatch KF et al: Failed fundoplications. Am J Surg 188:786, 2004; Higuchi N et al: Endoscopic band ligation therapy for upper gastrointestinal bleeding related to Mallory-Weiss syndrome. Surg Endosc 20:1431, 2006; Khajanchee YS et al: Laparoscopic reintervention for failed antireflux surgery: subjective and objective outcomes in 176 consecutive patients. Arch Surg 142:785, 2007; Khajanchee YS et al: Postoperative symptoms and failure after antireflux surgery. Arch Surg 137:1008, 2002; Lafullarde T et al: Laparoscopic Nissen fundoplication: five-year results and beyond. Arch Surg 136:180, 2001; Leontiadis GI et al: Systematic reviews of the clinical effectiveness and cost-effectiveness of proton pump inhibitors in acute upper gastrointestinal bleeding. Health Technol Assess 11:1, 2007; Lin HJ: Pre-endoscopic PPI therapy reduces recurrent adverse outcomes in acute non-variceal upper gastrointestinal bleeding. Aliment Pharmacol Ther 25:343, 2007; Lord RV et al: Absence of gastroesophageal reflux disease in a majority of patients taking acid suppression medications after Nissen fundoplication. J Gastrointest Surg 6:3, 2002; Oleynikov D et al: Total fundoplication is the operation of choice for patients with gastroesophageal reflux and defective peristalsis. Surg Endosc 16:909, 2002; Palmer K: Acute upper gastrointestinal haemorrhage. Br Med Bull 83:307, 2007; Pandolfino JE et al: Restoration of normal distensive characteristics of the esophagogastric junction after fundoplication. Ann Surg 242:43, 2005; Pohl D et al: Management and outcome of complications after laparoscopic antireflux operations. Arch Surg 136:399, 2001; Portale G et al: A current assessment of endoluminal approaches to the treatment of gastroesophageal reflux disease. Surg Innov 11:225, 2004; Power C et al: Factors contributing to failure of laparoscopic Nissen fundoplication and the predictive value of preoperative assessment. Am J Surg 187:457, 2004; Rosemurgy AS et al: Reoperative fundoplications are effective treatment for dysphagia and recurrent gastroesophageal reflux. Am Surg 70:1061, 2004; Soper NJ: Fundoplication and the short gastric vessels: divide and conquer. Ann Surg 235:171, 2002; Safranek PM et al: Results of laparoscopic reoperation for failed antireflux surgery: does the indication for redo surgery affect the outcome? Dis Esophagus 20:341, 2007; Targownik LE et al: The role of rapid endoscopy for high-risk patients with acute nonvariceal upper gastrointestinal bleeding. Can J Gastroenterol 21:425, 2007; Targownik LE, Nabalamba A: Trends in management and outcomes of acute nonvariceal upper gastrointestinal bleeding: 1993-2003. Clin Gastroenterol Hepatol 4:1459, 2006; Theodorou DA, Peters JH: Causes of failure of antireflux surgery. Semin Laparosc Surg 8:272, 2001; van Lanschot JJ: Management of bleeding gastroduodenal ulcers. Dig Surg 19:99, 2002; Williams VA et al: Gastrectomy as a remedial operation for failed fundoplication. J Gastrointest Surg 11:29, 2007.

Educational Objectives

The goal of this program is to improve surgical management of gastroesophageal reflux disease (GERD), as well as the management of emergent upper gastrointestinal (GI) bleeding. After hearing and assimilating this program, the clinician will be better able to:
1. Identify the surgical procedure of choice for GERD and the factors predictive of a successful outcome.
2. Examine technical components of antireflux surgery and outline the keys to successful treatment.
3. Recognize and explain what constitutes the failure of antireflux surgery.
4. Discuss the reasons for failure and the outcomes associated with reoperative antireflux surgery.
5. Describe the recommended treatment of acute upper GI bleeding.

Faculty Disclosure

In adherence to ACCME Standards for Commercial Support, Audio-Digest requires all faculty and members of the planning committee to disclose relevant financial relationships within the past 12 months that might create any personal conflicts of interest. Any identified conflicts were resolved to ensure that this educational activity promotes quality in health care and not a proprietary business or commercial interest. For this program, the following has been disclosed: Dr. Swanstrom has received educational grants from Ethicon Endo-Surgery, research support from USGI Medical and Olympus America, and research support and royalties from Richard Wolf Medical Instruments. Additionally, he has been a consultant for NDO Surgical. Drs. Peters and Lucas and the planning committee reported nothing to disclose.

Acknowledgements

Drs. Peters and Swanstrom spoke at the Esophageal Conference, held September 6-7, 2007, in Omaha, NE, and sponsored by the Creighton University Medical Center and School of Medicine. Dr. Lucas was recorded at the Detroit Trauma Symposium, held November 8-9, 2007, in Detroit, MI, and sponsored by the Detroit Medical Center (DMC), Detroit Receiving Hospital, and Wayne State University School of Medicine. The Audio-Digest Foundation thanks the speakers and the sponsors for their cooperation in the production of this program.

Reproduction of this summary in whole or in part in any form or medium without express written permission is prohibited.

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