Acute pericardial tamponade following superior vena cava stent migration in a dialysis patient: A case report / 中国胸心血管外科临床杂志

@#Central venous stenosis is a common complication following long-term dialysis catheter placement in dialysis patients. Generally, percutaneous angioplasty is the treatment of choice, and venous stent implantation should be considered in different situations. However, the venous stent migrating into right atrium is a rare but fatal complication. We presented a patient whose superior vena cava stents migrated into right atrium, resulting in acute tamponade, and exploratory thoracotomy was proceeded.

Enterocutaneous fistulas due to stent migration. How reliable is its use on duodenal benign pathology? a case report

Duodenal stenting has been widely used on malignant pathology on selected patients with poor prognosis and advanced disease. In these last years, there has been a clear ampliation of the clinical applications of endoscopy procedures and stents. Its use on benign pathology is spreading but there is a lack of literature about the complications in this context. The incidence of stent migration is about 10-25% in self-expandable metal stent (SEMS), and 2-5% on covered self-expanding metal stents (CSEMS). We reported a clinical case of a 48 years old patient who developed a duodenal ulcer. The patient was submitted to exploratory laparotomy, with duodenal primary closure of the ulcer. Later, the patient developed a enterocutaneous fistula because of the duodenal leak. It was referred to our third level hospital to the hepatopancreatobiliary surgery service. A new exploratory laparotomy with duodenal exclusion was planned, but it was impossible to access due to frozen abdomen. CSEMS was placed in the duodenal bulb resulting in the resolution of leaking, but the stent could not be removed because of migration. The stent trajectory was followed by abdominal x ray and tomography. The patient developed multiple intestinal an fecal enterocutaneous fistulas. It was submitted to multiples endoscopies, colonoscopies and enteroscopy without any success to reaching it. It was decided to perform a right lumbotomy to extract the prothesis. The stent was surgically removed, a planned stoma was left on the right flank on the extraction site.

Post operative complications of double-J ureteral stenting: a prospective study

Background: Placement of indwelling ureteral stents has become routine in the management of variety of urinary tract infections. Despite the advances and technology, the ideal stent is not available yet. A double-J stent is never without potential complications which may be minor in form of hematuria, dysuria, frequency, flank and suprapubic pain to major complications such as vesicoureteric reflux, migration, malposition, encrustation, stent fracture etc.Methods: One hundred urological patients who had undergone double-J ureteral stenting attending surgery department were taken. Patients were subjected to detailed history and clinical examination and other routine investigations and symptoms of any complications were recorded starting at the time of placement of double-J ureteral stent till its removal.Results: Majority of the patients in our study had only minor complications related to double-J ureteral stenting like flank or suprapubic pain, dysuria, hematuria and urgency which were managed conservatively. Major complication like stent migration was seen only in 1 patient which was managed with removal of stent.Conclusions: At the end of study, we concluded that double-J stents have become an essential part of many endourological and open urological procedures and their use cannot be completely avoided.

Efficacy of Retrievable Metallic Stent with Fixation String for Benign Stricture after Upper Gastrointestinal Surgery

OBJECTIVE: To determine the efficacy of retrievable metallic stent with fixation string for benign anastomotic stricture after upper gastrointestinal (UGI) surgery. MATERIALS AND METHODS: From June 2009 to May 2015, a total of 56 retrievable metallic stents with fixation string were placed under fluoroscopy guidance in 42 patients who were diagnosed with benign anastomotic stricture after UGI surgery. Clinical success was defined as achieving normal regular diet (NRD). RESULTS: The clinical success rate after the first stent placement was 57.1% (24/42). After repeated stent placement and/or balloon dilation, the clinical success rate was increased to 83.3% (35/42). Six (14.3%) patients required surgical revision to achieve NRD. One (2.4%) patient failed to achieve NRD. Stent migration occurred in 60.7% (34/56) of patients. Successful rate of removing the stent using fixation string and angiocatheter was 94.6% (53/56). Distal migration occurred in 12 stents. Of the 12 stents, 10 (83.3%) were successfully removed whereas 2 could not be removed. No complication occurred regarding distal migration. CONCLUSION: Using retrievable metallic stent with a fixation string is a feasible option for managing early benign anastomotic stricture after UGI surgery. It can reduce complications caused by distal migration of the stent.

Three Cases of Graft Replacement of Distal Arch Aneurysm after Open-Stent Graft Technique due to Stent Migration and Endoleak / 日本心臓血管外科学会雑誌

Exposure of the surgical field and bleeding control are main problems of distal anastomosis during an operation for distal arch aneurysms. The open-stent technique and thoracic endovascular aortic repair (TEVAR) are useful techniques for the resolution of these problems. Recently, TEVAR has progressively expanded in the treatment of various complex thoracic aortic diseases. However, complications such as endoleaks and graft migrations have still remained an issue. Although some patients who have late distal endoleaks can be almost treated successfully with additional TEVAR, some of them cannot. We report 3 cases of graft replacement of descending aorta after open-stent technique due to stent migrations and endoleaks. All of them were previously performed by total arch replacement with open-stent technique for distal aortic arch aneurysms. The follow-up CT after the first operation revealed graft migrations and endoleaks. The open surgical repairs through left lateral thoracotomy were performed, followed by graft replacements. The stent grafts were easily clamped after the incision of the aneurysm. In 2 cases, grafts were directly anastomosed to the descending aorta after the removal of the stent. In 1 case, graft was extended with new graft and then anastomosed to the descending aorta. These procedures were technically successful ; there were no trouble to exfoliate aorta, to perform anastomosis and hemostasis, and neither patient developed major complications. These results indicate that open surgical repair of descending aorta could be one of the safety options for the treatment of endoleaks and stent migrations of thoracic aortic stent graft in the era of increasing endovascular therapy.

Migration of a Biliary Self-Expanding Metal Stent into the Stomach after Stent Placement in a Patient with Periampullary Cancer / 대한소화기내시경학회지

Migration of a biliary self-expanding metallic stent (SEMS) may occur proximally or distally after placing a stent for the palliative treatment of patients with unresectable periampullary malignancy. However, migration of a biliary SEMS into the stomach has not yet reported in the English medical literature. Herein we report on a case of periampullary cancer for which a stent that was placed to treat this malady migrated into the stomach. A biliary SEMS had been placed in the distal common bile duct in an 82-year-old woman who was diagnosed with periampullary cancer. The abdominal CT and esophagogastroduodenoscopic findings disclosed that the biliary SEMS had migrated into the stomach and there was marked luminal narrowing of the second portion of the duodenum due to the enlarged periampullary tumor. The migrated stent was easily removed by using a polypectomy snare. We presume that the distally migrated SEMS might have moved into the stomach against the normal direction of peristaltic movement instead of migrating to the intestine because of the duodenal obstruction caused by the growing mass.

Clicical Evaluation of a Novel Method for Endoscopic Removal of an EsophaCoil TM Stent which Migrated into the Stomach and Rectum / 대한소화기내시경학회지

BACKGROUND AND AIMS: The coiled stent is designed to allow removal in the event that stent malposition or migration occurs in patients with an inoperable malignant esophageal obstruction. There is limited published material on the EsophaCoilTM, especially with regard to its removability. A novel method for endoscopic removal of migrated EsophaCoilTM prosthesis is herein described. METHODS: Seven instances of migration occurred in 19 patients who had undergone coiled stent placement for carcinoma of the distal esophagus or gastric cardia. The stents had migrated into the stomach in 6 cases and the stent was at the rectosigmoid junction in 1 patient. The migrated stents were removed endoscopically using a conventional method in 3 cases, and the Song's stent introducer with a metal tip and overtube under fluoroscopic guidance, in the remaining 4 patients. RESULTS: Using the new endoscopic removal technique, migrated stents were successfully removed in 4 patients after conventional methods failed. There were no complications. CONCLUSIONS: An EsophaCoilTM stent, migrating into the stomach or rectum, could be removed easily by this new method using the overtube and Song's stent introducer.

A Prospective Clinical Trial of the Newly Designed Esophageal Covered Metal Stent for Prevention of Stent Migration / 대한소화기내시경학회지

BACKGROUND AND AIMS: Palliation of malignant esophageal obstructions consists mainly of symptomatic treatment of dysphagia. For this purpose, variable self expandable esophageal stents have recently been used. Of these stents, membrane covered self expandable metal stents (SEMS) are effective to prevent tumor ingrowth and stent obstruction. But migration is the main problem of covered SEMS. So we made a newly designed covered SEMS for the prevention of stent migration and studied prospectively to define its palliative ability and whether this stent is effective for prevention of migration problems. METHODS: From January to December 1998, 27 patients [23 men, 4 women; mean age 60 years, range 20 to 80] were inserted with newly designed esophageal stents and studied. Data analysis included the location and length of malignant strictures, the length of the inserted esophageal stents, the time for fixation of the stents after insertion, complications related to stent insertion, and the effectiveness of the newly designed stent for prevention of the stent migration. RESULTS: 1) The location of esophageal strictures were 4 in the mid- esophagus (three tracheo-esophageal fistula due to two lung and one esophageal cancer, one esophageal cancer), 7 in the distal esophagus (all esophageal cancer), and 16 in the esophagogastric junction (6 cases of esophageal cancer, 9 with gastric cardiac cancer, and 1 with gastric lymphoma). 2) The mean length of the strictures was 5.2 (3 to 12) cm. 3) The mean length of the stents was 11 (8 to 16) cm. 4) Time for fixation of the stents was 7.2 (5 to 13) days after the stent insertion. 5) Stent placement was successful in all patients without any serious stent-related complications such as esophageal perforation or hemorrhage. During the mean follow-up period of 6 (1 to 12) months, there was no stent migration. CONCLUSIONS: The newly designed covered SEMS was very effective in preventing stent migration without any serious stent-related complications, especially in malignant strictures of the esophagogastric junction, short segment strictures, and T-E fistulas without tumor shoulder.