Esophagectomy represents a very extensive surgical procedure. Adverse long-term quality of life has been linked to patients experiencing postoperative complications including anastomotic leaks3. Risk factors for an anastomotic leak primarily include creation of an anastomosis with poor blood supply. An anastomotic leak not only represents a significant source of postoperative morbidity, but also can commonly result in stricture. A stricture can also be a result of technical issues including performing a small diameter anastomosis. Besides impacting quality of life, strictures add to overall medical costs when dilatation is needed5. Accurately performing several steps is of utmost importance to minimize complications as well as achieve good oncologic and upper gastrointestinal tract functional outcomes.
Esophagogastric anastomosis can be accomplished by several methods, including hand sewn, EEA, and linear stapler techniques representing the majority. A report from the Society of Thoracic Surgeons General Thoracic Database cited an overall leak rate of 9.3% in patients undergoing intrathoracic esophagogastric anastomoses6. While postoperative mortality due to anastomotic leak seems to be decreasing, subsequent stricture rates remain high, ranging between 10 and 56%7. Collard and Orringer described a linear stapler technique to create a side-to-side cervical esophagogastric anastomosis8,9. The posterior triangulated opening formed by the linear stapler was demonstrated to result in a low leak rate as well as resistance to stricture. A retrospective study from Mayo Clinic reported a 5.6% incident of intrathoracic anastomotic leak in 177 patients where a linear stapled technique was used versus an 8.3% leak rate in 48 patients who underwent an EEA stapled anastomosis. While this difference did not reach statistical difference, the one-year probability for stricture was 32% after EEA anastomosis as compared to only 8.6% with linear stapled techniques, which was significant5. Wang and colleagues performed a prospective clinical trial involving 155 patients who were randomized into one of three esophagogastric anastomotic methods10. Impressively, no postoperative strictures developed in patients undergoing a linear stapler technique as compared to 9.6% and 19.1% in the hand sewn and circular stapled cases respectively, which was statistically significant. Prior studies involving linear stapler anastomoses have utilized the anterior wall of the stomach conduit for the anastomotic site. This approach may lead to an ischemic strip of conduit between the lesser curve staple line and the anastomosis predisposing to leak. Novel to our technique, collateral blood supply to the stomach conduit tip is preserved by cutting through and restapling the lesser curve staple line.
There are limitations to the study. First, this represents a retrospective analysis. Despite the retrospective nature however, we utilized this STS approach uniformly in all patients undergoing surgery for mid-esophageal to proximal stomach pathology over the study interval as an “intent to treat” including stable patients who sustained esophageal perforations during dilatation for stricture where repair was not possible. Common to any intrathoracic side-to-side anastomotic technique is the need to dissect an additional 3 to 4 cm of proximal esophagus, potentially decreasing the length of surgical esophageal margin in cases of malignancy and also potentially resulting in some degree of esophageal devascularization. To avoid devascularization, a critical point is not to dissect the intrathoracic esophagus any further superiorly toward the neck than the tip of the stomach conduit will reach without tension.We speculate the higher leak rate observed using this technique for patients with end-stage achalasia may be related to further devascularization of a thicken esophageal wall after mobilization to perform an STS anastomosis where the preexisting blood supply may be poor. Esophageal dilatation frequently seen in achalasia cases makes hand sewing the open common lumen very difficult, which may also be a factor.Based on this experience, we now believe that achalasia is a contraindication to perform STS intrathoracic anastomoses.Of note, for long or more central cancers where an esophagogastric anastomosis needs to be created near the thoracic inlet to achieve an adequate proximal esophageal margin, we have utilized a somewhat shorter initial side-to-side communication not utilizing the entire length of the 45 mm GIA which however has potential to be more prone to stricture formation.
Unlike the esophagus, the stomach is a passive conduit, gravity dependent for drainage. Several variables including conduit diameter and length as well as conduit orientation can, therefore, significantly impact upper gastrointestinal tract function. Ingested food has the potential to hang up in three locations: the esophagogastric anastomosis, the stomach body, and gastric outlet. Poor conduit function can be a result of technical issues in any of these three areas. Poor conduit emptying paradoxically can cause more “reflux,” not only negatively impacting quality of life but also occasionally resulting in aspiration. “Minimally invasive” (laparoscopic/thoracoscopic) approaches, which utilize an EEA stapler for esophagogastric anastomoses, although still representing the minority of esophagectomy cases performed, have become increasingly popular. We believe however our open technique as described not only allows creations of precise STS esophagogastric anastomosis to reduce the stricture rates but additionally optimizes conduit construction and orientation with a straight non-redundant stomach conduit including pyloroplasty with minimal tendency for ingested food materials to hang up in these areas as compared to thoracoscopic approaches. The measured contrast transit times from mouth to small bowel on routine postoperative studies would support excellent conduit function with our technique, however comparative studies using other techniques are needed. Our observations would support minimal and self-limiting “dumping” symptoms in the vast majority of STS patients however specific quality of life assessments are currently underway. Finally, with the thoracotomy approach described, we have observed little difference with respect to acute and long-term postoperative discomfort as compared to patients undergoing a thoracoscopic approach at our institution.
In summary, we believe this novel STS technique can significantly reduce the morbidity and occasional mortality of esophagogastric anastomotic complications following esophagectomy. Conduit construction and orientation as described additionally optimizes upper gastrointestinal tract function. Finally, this technique is easily adapted and reproducible.