ABSTRACT
Although surgery is the usual management strategy for acquired benign tracheoesophageal fistula, sometimes this approach is contraindicated or the patient declines surgical management. In this report, we describe a case of a patient with tracheoesophageal fistula at the level of the carina due to bronchial arterial infusion chemotherapy. Closure could not be achieved in response to multiple treatment strategies, including airway stenting, esophageal stenting, occlusion with microcoils, or cyanoacrylate glue. We subsequently achieved closure of this fistula through the combination of a modified silicon stent and metallic stents.
ABSTRACT
To evaluate the efficacy of radiofrequency lung ablation with transbronchial saline injection. The bilateral lungs of eight living swine were used. A 13-gauge bone biopsy needle was inserted percutaneously into the lung, and 1 ml of muscle paste was injected to create a tumor mimic. In total, 21 nodules were ablated. In the saline injection group (group A), radiofrequency ablation (RFA) was performed for 11 nodules after transbronchial saline injection under balloon occlusion with a 2-cm active single internally cooled electrode. In the control group (group B), conventional RFA was performed for 10 nodules as a control. The infused saline liquid showed a wedge-shaped and homogeneous distribution surrounding a tumor mimic. All 21 RFAs were successfully completed. The total ablation time was significantly longer (13.4 +/- 2.8 min vs. 8.9 +/- 3.5 min; P = 0.0061) and the tissue impedance was significantly lower in group A compared with group B (73.1 +/- 8.8 Omega vs. 100.6 +/- 16.6 Omega; P = 0.0002). The temperature of the ablated area was not significantly different (69.4 +/- 9.1 degrees C vs. 66.0 +/- 7.9 degrees C; P = 0.4038). There was no significant difference of tumor mimic volume (769 +/- 343 mm(3) vs. 625 +/- 191 mm(3); P = 0.2783). The volume of the coagulated area was significantly larger in group A than in group B (3886 +/- 1247 mm(3) vs. 2375 +/- 1395 mm(3); P = 0.0221). Percutaneous radiofrequency lung ablation combined with transbronchial saline injection can create an extended area of ablation.
Subject(s)
Catheter Ablation/methods , Lung Neoplasms/surgery , Lung/surgery , Radiology, Interventional/methods , Sodium Chloride/administration & dosage , Animals , Bronchi , Disease Models, Animal , Female , Fluoroscopy , Injections , Lung/diagnostic imaging , Lung/pathology , SwineABSTRACT
We have attempted transcatheter arterial embolization (TAE) with SMANCS and epiADM for 40 patients with hepatocellular carcinoma and evaluated its therapeutic effects and side effects. There were 7 cases of stage I disease, 10 cases of stage II disease, 10 cases of stage III disease and 13 cases of stage IV disease. Patients underwent TAE superselectively following infusion of w/o emulsion of epiADM and SMANCS-lipiodol. No severe side effect was observed compared with conventional Lp-TAE except in one case with hepatic biloma after treatment. The overall response rate was 70%, and 54.5% in the patients with recurrent tumor after Lp-TAE. The serum AFP value decreased in 16 patients out of 20 patients. Hepatic resection was performed in 2 patients after treatment, and no viable tumor cell was recognized in the specimen. Our result suggested that TAE with SMANCS and epiADM will contribute to improved therapeutic efficacy for hepatocellular carcinoma.
Subject(s)
Antineoplastic Combined Chemotherapy Protocols/administration & dosage , Carcinoma, Hepatocellular/therapy , Embolization, Therapeutic , Epirubicin/administration & dosage , Iodized Oil/administration & dosage , Liver Neoplasms/therapy , Maleic Anhydrides/administration & dosage , Polystyrenes/administration & dosage , Zinostatin/analogs & derivatives , Adult , Aged , Drug Administration Schedule , Female , Hepatic Artery , Humans , Infusions, Intra-Arterial , Male , Middle Aged , Zinostatin/administration & dosageABSTRACT
Strecker stent is a balloon-expandable metallic stent that is made of knitted tantalum wire mesh in order to Maintain flexibility. Therefore, the prosthesis is well suited to irregular and tortuous tube organs. We performed several physical experiments using 8 mm and 6 mm diameter stents made of 0.1 mm diameter wire filament. The bearing power of the 8 mm diameter stent against the circumferential compression pressure was divided into two groups, that is, 77-100% and under 66% of expansile rate. The capacity bearing the circumferential compression pressure of the latter group was greater than that of the former. Further, the bearing power of the 6 mm diameter stent was greater than that of the 56% expansile rate of the 8 mm diameter stent. The smaller the expansile rate of the stent, the smaller the minimum radius of curvature within the limits of the stent's plastic. To evaluate the suitability of the stent in clinical use, we made two projections on the inner surface of rubber tubes, and the stents were placed into the rubber tubes at different expansile rates. We evaluated the degree of contact of the stents against the rubber wall by taking soft X-ray photographs. The stents showed good suitability under the condition of incomplete expansion. For the above reasons, we concluded that, from the view-point of bearing power, the stent should be placed in the full expansile state. From the viewpoint of contact against the vessel wall, the stent should be placed in the incomplete expansile state.
