Fernando A. Herbella

The Prevalence of Distal and Proximal Gastroesophageal Reflux in Patients Awaiting Lung Transplantation

Objective:To determine the prevalence and proximal extent of gastroesophageal reflux (GERD) in patients awaiting lung transplantation. Background:GERD has been postulated to contribute to accelerated graft failure in patients who have had lung transplantations. However, the prevalence of reflux symptoms, esophageal motility abnormalities, and proximal esophageal reflux among patients with end-stage lung disease awaiting lung transplantation are unknown. Methods:A total of 109 patients with end-stage lung disease awaiting lung transplantation underwent symptomatic assessment, esophageal manometry, and esophageal pH monitoring (using a probe with 2 sensors located 5 and 20 cm above the lower esophageal sphincter). Results:Reflux symptoms were not predictive of the presence of reflux (sensitivity, 67%; specificity, 26%). Esophageal manometry showed a high prevalence of a hypotensive lower esophageal sphincter (55%) and impaired esophageal peristalsis (47%) among patients with reflux. Distal reflux was present in 68% of patients and proximal reflux was present in 37% of patients. Conclusions:These data show that in patients with end-stage lung disease: 1) symptoms were insensitive and nonspecific for diagnosing reflux; 2) esophageal motility was frequently abnormal; 3) 68% of patients had GERD; 4) in 50% of the patients with GERD, acid refluxed into the proximal esophagus. We conclude that patients with end-stage lung disease should be screened with pH monitoring for GERD.

Gastroesophageal Reflux Disease and Obesity. Pathophysiology and Implications for Treatment

Although the etiology of gastroesophageal reflux disease (GERD) is multifactorial, the pathophysiology of the disease in morbidly obese patients remains incompletely understood. The aims of this study were to compare in morbidly obese (body mass index (BMI) ≥35) and nonmorbidly patients (BMI <35) with GERD: (a) lower esophageal sphincter (LES) profile; (b) esophageal body function; and (c) esophageal acid exposure. We reviewed esophageal manometry and ambulatory 24-hour pH monitoring studies of 599 consecutive patients with GERD (DeMeester score >14.7). Patients were divided into two groups according to the BMI: (1) 520 patients (86.8%) with BMI <35 and (2) 79 patients (13.2%) with BMI ≥35. While the DeMeester score was not different between the two groups, morbidly obese patients had higher LES pressure and higher amplitude of peristalsis in the distal esophagus (DEA). Among these patients, LES and DEA pressures were often hypertensive. A linear regression model showed that BMI, LES pressure, LES abdominal length, and DEA were independently associated with the DeMeester score. These data showed that: (a) BMI was independently associated to the severity of GERD; and (b) in most morbidly obese patients with GERD, reflux occurred despite normal or hypertensive esophageal motility. These findings show that the pathophysiology of GERD in morbidly obese patients might differ from that of nonobese patients, suggesting the need for a different therapeutic approach.

Effect of partial and total laparoscopic fundoplication on esophageal body motility

BackgroundAbnormal esophageal body motility often accompanies gastroesophageal reflux disease (GERD). Although the effect of surgery on the pressure and behavior of the lower esophageal sphincter (LES) has been extensively studied, it still is unclear whether a successful fundoplication improves esophageal peristalsis.MethodsThe pre- and postoperative esophageal manometries of 71 patients who underwent a successful laparoscopic fundoplication (postoperative DeMeester score < 14.7) were reviewed. The patients were grouped according to the type of fundoplication (partial vs total) and preoperative esophageal peristalsis (normal vs abnormal): group A (partial fundoplication and abnormal esophageal peristalsis; n = 16), group B (total fundoplication and normal peristalsis; n = 41), and group C (total fundoplication and abnormal peristalsis; n = 14).ResultsThe LES pressure was increased in all the groups. A significant increase in amplitude of peristalsis was noted in groups A and C. Normalization of peristalsis was achieved in 31% of the group A patients and 86% of the group C patients. No changes occurred in group B.ConclusionsLaparoscopic fundoplication increased LES pressure and the strength of esophageal peristalsis in patients with abnormal preoperative esophageal motility. A total fundoplication resulted in normalization of peristalsis in the majority of patients.

Side-to-side stapled intra-thoracic esophagogastric anastomosis reduces the incidence of leaks and stenosis.

Trans-hiatal esophagectomy with a hand-sewn anastomosis was for 2 decades the preferred approach in our institution for patients with esophageal cancer. In our experience, this anastomotic technique was associated with a 12% leak rate and a 48% rate of stricture requiring dilatation. We sought to determine if a side-to-side intra-thoracic anastomosis was associated with a lower rate of anastomotic stricture and leak. Thirty-three consecutive patients with distal esophageal cancer or Barretts esophagus with high grade dysplasia underwent a trans-thoracic esophagectomy with a side-to-side stapled intra-thoracic anastomosis. The overall morbidity was 27%, with no anastomotic stricture or leaks. One patient died (3%). The median time to the resumption of an oral diet was 7 days (range 5-28), and the median length of stay in hospital was 9 days (range 6-45). Trans-thoracic esophagectomy with a side-to-side stapled anastomosis is safe and it is associated with a very low rate of anastomotic complications. We consider this to be the procedure of choice for patients with distal esophageal cancers.

Hiatal mesh repair--current status.

Most surgeons believe that cruroplasty (hiatoplasty) is an essential part of antireflux operations. One of the main causes of failure after antireflux operation is gastric (wrap) herniation through the hiatus that may be attributed to breakdown of the hiatal closure or a faulty repair. Surgeons are at present faced with the dilemma of choosing between a risk of recurrence and the fear of complications of prosthetic hiatal reinforcement. We reviewed the literature to evaluate the current status of hiatal mesh repair (HMR). Indication, technique, complications, and results are shown. Available data show a small number of mesh-related complications compared with the number of patients submitted to the procedure, and better results of HMR compared with simple hiatal closure. We support the use of HMR when performed by skilled foregut surgeons, as complications described occurred more frequently in the earliest cases of the series. In addition, HMR should be probably used selectively. However, studies to identify the patients at risk of hernia recurrence or mesh-related complications are still elusive. The ideal type of mesh and the ideal technique for mesh implantation are yet to be established.

Primary versus secondary esophageal motility disorders: diagnosis and implications for treatment.

Ambulatory pH monitoring is essential in patients with a manometric pattern of either diffuse esophageal spasm (DES) or nutcracker esophagus (NE), since these diseases can be considered a primary esophageal motility disorder (PEMD) only in the absence of gastroesophageal reflux disease (GERD). If GERD is present, the motility abnormality is considered secondary, and treatment is directed toward reflux. The aims of this study were to determine in patients with a manometric picture of DES and NE (1) if symptoms alone can distinguish PEMD from GERD and (2) the value of ambulatory pH monitoring. A total of 180 patients fulfilled the manometric criteria for NE, and 124 (69%) of them had GERD detected by ambulatory pH monitoring. Among the 56 patients with PEMD, 31 (55%) were taking proton pump inhibitors on the assumption that GERD was present. Chest pain prevalence was similar when the two groups were compared; however, the symptom was more severe in the PEMD patients. Heartburn prevalence and severity was higher in the GERD group. A total of 121 patients fulfilled the manometric criteria for DES, and 73 (60%) of them had GERD detected by ambulatory pH monitoring. Among the 48 patients with PEMD, 39 (81%) were taking proton pump inhibitors. Dysphagia was more prevalent in the PEMD group. These data show that (1) 2 of 3 of patients with a manometric picture of NE or DES have GERD and (2) symptoms did not distinguish PEMD from GERD. Esophageal manometry and pH monitoring are essential to distinguish PEMD from GERD and to guide appropriate therapy.

Impact of minimally invasive surgery on the treatment of benign esophageal disorders

Thanks to the development of minimally invasive surgery, the last 20 years have witnessed a change in the treatment algorithm of benign esophageal disorders. Today a laparoscopic operation is the treatment of choice for esophageal achalasia and for most patients with gastroesophageal reflux disease. Because the pathogenesis of achalasia is unknown, treatment is palliative and aims to improve esophageal emptying by decreasing the functional obstruction at the level of the gastro-esophageal junction. The refinement of minimally invasive techniques accompanied by large, multiple randomized control trials with long-term outcome has allowed the laparoscopic Heller myotomy and partial fundoplication to become the treatment of choice for achalasia compared to endoscopic procedures, including endoscopic botulinum toxin injection and pneumatic dilatation. Patients with suspected gastroesophageal reflux need to undergo a thorough preoperative workup. After establishing diagnosis, treatment for gastroesophageal reflux should be individualized to patient characteristics and a decision about an operation made jointly between surgeon and patient. The indications for surgery have changed in the last twenty years. In the past, surgery was often considered for patients who did not respond well to acid reducing medications. Today, the best candidate for surgery is the patient who has excellent control of symptoms with proton pump inhibitors. The minimally invasive approach to antireflux surgery has allowed surgeons to control reflux in a safe manner, with excellent long term outcomes. Like achalasia and gastroesophageal reflux, the treatment of patients with paraesophageal hernias has also seen a major evolution. The laparoscopic approach has been shown to be safe, and durable, with good relief of symptoms over the long-term. The most significant controversy with laparoscopic paraesophageal hernia repair is the optimal crural repair. This manuscript reviews the evolution of these techniques.

Achalasia and Respiratory Symptoms: Effect of Laparoscopic Heller Myotomy

BACKGROUNDnDysphagia and regurgitation are considered typical symptoms of achalasia. However, there is mounting evidence that some achalasia patients may also experience respiratory symptoms such as cough, wheezing, and hoarseness.nnnAIMSnThe aims of this study were to determine: (1) what percentage of achalasia patients experience respiratory symptoms and (2) the effect of a laparoscopic Heller myotomy and Dor fundoplication on the typical and respiratory symptoms of achalasia.nnnPATIENTS AND METHODSnBetween May 2008 and December 2015, 165 patients with achalasia were referred for treatment to the Center for Esophageal Diseases of the University of Chicago. Patients had preoperatively a barium swallow, endoscopy, and esophageal manometry. All patients underwent a Heller myotomy and Dor fundoplication.nnnRESULTSnBased on the presence of respiratory symptoms, patients were divided into two groups: group A, 98 patients (59%) without respiratory symptoms and group B, 67 patients (41%) with respiratory symptoms. The preoperative Eckardt score was similar in the two groups (6.5u2009±u20092.1 versus 6.4u2009±u20092.0). The mean esophageal diameter was 27.7u2009±u200910.8u2009mm in group A and 42.6u2009±u200920.1u2009mm in group B (Pu2009<u2009.05). The operation consisted of a myotomy that extended for 5u2009cm on the esophagus and 2.5u2009cm onto the gastric wall. At a median postoperative follow-up of 17 months, the Eckardt score improved significantly and similarly in the two groups (0.3u2009±u20090.8 versus 0.3u2009±u20091.0). Respiratory symptoms improved or resolved in 62 patients (92.5%).nnnCONCLUSIONSnThe results of this study showed that: (1) respiratory symptoms were present in 41% of patients; (2) patients with respiratory symptoms had a more dilated esophagus; and (3) surgical treatment resolved or improved respiratory symptoms in 92.5% of patients. This study underlines the importance of investigating the presence of respiratory symptoms along with the more common symptoms of achalasia and of early treatment before lung damage occurs.

Secrets for successful laparoscopic antireflux surgery

Gastroesophageal reflux disease (GERD) is high prevalent in the modern World with over 240,000,000 individuals suffering from the disease (1).

Avaliação do treinamento e expectativas profissionais em residentes de cirurgia

Residency programs, especially in surgery, have been undergoing constant changes, not only in our country, but also internationally. Due to the depreciation of medical specialties and their lowering compensation, expectations and profile of residents in surgical fields are changing. The assessment of attitudes, experience in training and professional expectations among residents is an important topic. Recent international studies published in the area demonstrate this fact. It is worth noting the absence of similar studies in our country, as well as others. This study aims to assess the residents of the area of surgery, through a questionnaire, their attitudes, experiences during training and professional expectations. We applied and analyzed questionnaires adapted and translated into Portuguese to 50 professionals of both sexes and different years of residence. The results of this study showed high satisfaction with the specialty, but large financial concern and conflicting opinions about the future of the specialty.