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Dimitrios Siablis

Publications and source records attributed to Dimitrios Siablis.

22 records · Page 2Linked to original sources
PubMed2002

Externally coated ureteral metallic stents: an unfavorable clinical experience.

OBJECTIVE: The purpose of the present study was to evaluate the use of externally coated stents in patients with malignant ureteral obstruction. MATERIALS AND METHODS: We have prospectively evaluated 16 patients, 10 men and 6 women, with malignant ureteral obstruction treated successfully by placement of Passager metal stents (Boston Scientific, Natick, MA, USA) bypassing the stricture. Mean patient age was 65.6 years (range 62-78 years). Ureteral patency was confirmed 24 and 48 hours by injection of contrast material through the nephrostomy tube, and after patency confirmation the nephrostomy catheter was removed. RESULTS: All stents were positioned successfully, and the postoperative course was uneventful. In 13 cases (81.2%) the prostheses finally migrated into the bladder hindering overall ureteral patency (mean time of migration: 1.5 months). Patency was achieved in the remaining ureters (n=3), during the follow-up period (mean: 8 months, range 6-16 months), without any need for further intervention. CONCLUSION: The inappropriate anchorage and the increased ureteral peristalsis are the main causes of migration towards the bladder, thus, minimizing the usefulness of this stent for the treatment of ureteral strictures.

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PubMedDate not supplied

Virtual endoscopy: navigation within pelvicaliceal system.

PURPOSE: To evaluate the use of virtual endoscopy (VE) for the investigation of the pelvicaliceal unit and the depiction of its anatomic deformities. PATIENTS AND METHODS: Two study groups were prospectively enrolled in our protocol: ten patients with nonurologic pathologies, and thus without any known deformity of the pelvicaliceal unit (group A), and five patients with caliceal obstruction (group B). Virtual endoscopy represented a non-invasive technique providing amplification of the image in three-dimensional space. RESULTS: Virtual endoscopy was feasible in all patients, and in all cases succeeded in demonstrating the threedimensional morphology of the region of interest. The entire processing time ranged from 10 to 15 minutes (mean 12.6 minutes), and the three-dimensional image could be viewed from different angles, allowing better evaluation of the collecting system and its deformities than is possible with conventional intravenous urography or percutaneous nephrostomography. CONCLUSION: Virtual endoscopy enabled the creation of endoluminal views of the renal pelvis and calices from spiral tomographic images, thereby allowing diagnostic-preoperative and postoperative evaluation of the pelvicaliceal unit.

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PubMedDate not supplied

Percutaneous rheolytic thrombectomy for treatment of acute renal-artery thrombosis.

PURPOSE: We present our experience with percutaneous rheolytic treatment with the AngioJet thrombectomy catheter for acute renal-artery thrombosis. CASE REPORT: A 63-year-old male patient with renal-artery thrombosis presented 48 hours after the onset of acute nonradiating flank pain. Thrombosis was documented by CT angiography, 99mTc-DTPA, and digital subtraction angiography. A percutaneous thrombectomy was performed with the AngioJet catheter. At the end of the procedure, the arterial lumen was patent, and no underlying stenosis or other deformity of the arterial wall was found. Thus, the cause of the obstruction was considered to be an embolus. After the procedure, urokinase was given to prevent distal occlusions from emboli that could have escaped mechanical thrombectomy. Heparin was also administered. The patient was released from the hospital with a patent renal unit and ameliorated serum creatinine concentration. CONCLUSION: We propose the use of the AngioJet thrombectomy catheter for the percutaneous treatment of acute renal-artery thrombosis.

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