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Endoscopic Techniques (endoscopic + techniques)
Selected AbstractsAtlas of Endoscopic TechniquesAUSTRALIAN AND NEW ZEALAND JOURNAL OF OBSTETRICS AND GYNAECOLOGY, Issue 2 2002David Salter No abstract is available for this article. [source] A new type of hemoclip deviceDIGESTIVE ENDOSCOPY, Issue 2 2005Kenichi Watanabe Background: There are many endoscopic techniques for hemostasis of non-variceal upper GI bleeding. Endoscopic hemoclip placement is one of the most important techniques. A rotatable clip-fixing device developed by Olympus Co. (Tokyo, Japan) has come into widespread use in Japan. However, it involves a number of problems, such as requirement of skill for attachment and it is time-consuming. Materials: We developed a new type of hemoclip device with collaboration with Olympus Co. Results: We explain the new type of hemoclip device and how to use it. Finally, we examine the convenience of the new type of hemoclip compared with previous devices. Conclusion: Hemoclip placement for bleeding of GI tract seems to be very convenient now and may become common in the world in the future. [source] Photodiagnostic techniques for the endoscopic detection of premalignant gastrointestinal lesionsDIGESTIVE ENDOSCOPY, Issue 3 2003Ralph S. DaCosta Considerable attention is given to the clinical diagnosis of gastrointestinal (GI) malignancies as they remain the second leading cause of cancer-associated deaths in developed countries. Detection and intervention at an early stage of preneoplastic development significantly improve patient survival. High-risk assessment of asymptomatic patients is currently performed by strict endoscopic surveillance biopsy protocols aimed at early detection of dysplasia and malignancy. However, poor sensitivity associated with frequent surveillance programs incorporating conventional screening tools, such as white light endoscopy and multiple random biopsy, is a significant limitation. Recent advances in biomedical optics are illuminating new ways to detect premalignant lesions of the GI tract with endoscopy. The present review presents a summary report on the newest developments in modern GI endoscopy, which are based on novel optical endoscopic techniques: fluorescence endoscopic imaging and spectroscopy, Raman spectroscopy, light scattering spectroscopy, optical coherence tomography, chromoendoscopy, confocal fluorescence endoscopy and immunofluorescence endoscopy. Relying on the interaction of light with tissue, these ,state-of-the-art' techniques potentially offer an improved strategy for diagnosis of early mucosal lesions by facilitating targeted excisional biopsies. Furthermore, the prospects of real-time ,optical biopsy' and improved staging of lesions may significantly enhance the endoscopist's ability to detect subtle preneoplastic mucosal changes and lead to curative endoscopic ablation of these lesions. Such advancements within this specialty will be rewarded in the long term with improved patient survival and quality of life. [source] Magnifying endoscopy with narrow band imaging for predicting the invasion depth of superficial esophageal squamous cell carcinomaDISEASES OF THE ESOPHAGUS, Issue 5 2009K. Goda SUMMARY The invasion depth of superficial esophageal squamous cell carcinoma is important in determining therapeutic strategy. The aim of this study was to prospectively investigate the clinical utility of magnifying endoscopy with narrow band imaging compared with that of non-magnifying high-resolution endoscopy or high-frequency endoscopic ultrasonography in predicting the depth of superficial esophageal squamous cell carcinoma. The techniques were carried out in 72 patients with 101 superficial esophageal squamous cell carcinomas, which were then resected by either endoscopic mucosal resection or esophagectomy. The histological invasion depth was divided into two: mucosal or submucosal carcinoma. We investigated the relationship between endoscopic staging and histology of tumor depth. Non-magnifying high-resolution endoscopy, magnifying endoscopy with narrow band imaging, and high-frequency endoscopic ultrasonography had overestimation/underestimation rates of 7/5, 4/4 and 8/3%, respectively. The sensitivity rates for the three techniques were 72, 78, and 83%, respectively, and the specificity rates were 92, 95, and 89%, respectively. There were no statistically significant differences among the three endoscopic techniques. Clinical utility of magnifying endoscopy with narrow band imaging does not seem to be significantly different from that of non-magnifying high-resolution endoscopy or high-frequency endoscopic ultrasonography in predicting the depth of superficial esophageal squamous cell carcinoma. Magnifying endoscopy with narrow band imaging may have potential to reduce overestimation risks of non-magnifying high-resolution endoscopy or high-frequency endoscopic ultrasonography. [source] The diagnosis of dysplasia and malignancy in Barrett's oesophagusHISTOPATHOLOGY, Issue 2 2000REVIEW Barrett's metaplasia is associated with an increased risk for adenocarcinoma. Adenocarcinoma develops through a multistep process characterized by defects in genes and morphological abnormalities. The early morphological changes of the process are called ,dysplasia'. Dysplasia is defined as an unequivocal neoplastic (premalignant) transformation confined within the basement membrane. For most Western pathologists malignancy is defined as invasion and characterized by a breach through the basement membrane. Japanese pathologists rely on cytological atypia and complex branching of crypts. Cytological and architectural abnormalities allow identification of dysplasia on routinely stained sections. A distinction is made between low- and high-grade dysplasia. The differential diagnosis between low-grade dysplasia and reactive changes can be difficult. Therefore a second opinion is strongly recommended, not only for high-grade dysplasia but also for low-grade. Immunohistochemistry for p53 and flow cytometry for detection of aneuploidy can support the diagnosis. Identification of dysplasia and malignancy depends on the number of biopsy samples examined. The minimum number of biopsies required has not yet been determined and depends partly on the length of the metaplastic segment. It has been proposed to sample with four quadrant biopsies at 20-mm intervals. New endoscopic techniques can increase the diagnostic yield. Endoscopically visible lesions increase the risk of finding malignancy. The time sequence for the progression of dysplasia is not known but progression from low- to high-grade and cancer has been shown to occur over a period of years although it may not be inevitable. [source] Endoscopic resection of gastrointestinal lesions: Advancement in the application of endoscopic submucosal dissectionJOURNAL OF GASTROENTEROLOGY AND HEPATOLOGY, Issue 8 2010Abby Conlin Abstract Curative endoscopic resection is now a viable option for a range of neoplastic lesions of the gastrointestinal tract (GIT) with low invasive potential. Risk of lymph node metastasis is the most important prognostic factor in selecting appropriate lesions for endoscopic therapy, and assessment of invasion depth is vital in this respect. To determine appropriate treatment, detailed endoscopic diagnosis and estimation of depth using magnifying chromoendoscopy is the gold standard in Japan. En bloc resection is the most desirable endoscopic therapy as risk of local recurrence is low and accurate histological diagnosis of invasion depth is possible. Endoscopic mucosal resection is established worldwide for the ablation of early neoplasms, but en bloc removal using this technique is limited to small lesions. Evidence suggests that a piecemeal resection technique has a higher local recurrence risk, therefore necessitating repeated surveillance endoscopy and further therapy. More advanced endoscopic techniques developed in Japan allow effective en bloc removal of early GIT neoplasms, regardless of size. This review discusses assessment of GIT lesions and options for endoscopic therapy with special reference to the introduction of endoscopic submucosal dissection into Western countries. [source] Role of radiology in the treatment of malignant hilar biliary strictures 1: Review of the literatureJOURNAL OF MEDICAL IMAGING AND RADIATION ONCOLOGY, Issue 1 2004Michael WJ Hii SUMMARY Malignant strictures of the biliary tree are an uncommon cause of obstructive jaundice. There are a number of pathological subtypes, but tumours in this region tend to have similar clinical and diagnostic features and therapeutic and prognostic implications. We review the published literature on this topic discussing diagnostic modalities and treatment options with a focus on radiological intervention. Diagnosis currently is best achieved using a range of procedures. Direct cholangiography remains the gold standard in delineating anatomy, but the invasiveness of this procedure limits its use as a purely diagnostic tool. Magnetic resonance technology, in particular magnetic resonance cholangiopancreatography, has an increasing role as accessibility is improved. Treatment of these tumours is difficult. Surgical resection and palliative biliary enteric bypass are the most common methods used with endoscopic and percutaneous therapies reserved for palliating patients not fit for surgery. There is little firm evidence to suggest that any one palliative modality is superior. Interventional radiology is particularly suitable for palliative management of difficult and expansive lesions as the anatomy can preclude easy access by surgical or endoscopic techniques. Good palliative results with minimal mortality and morbidity can be achieved with percutaneous stenting . [source] Current diagnosis and management of primary sclerosing cholangitisLIVER TRANSPLANTATION, Issue 6 2008Jens J. W. Tischendorf Primary sclerosing cholangitis (PSC) is an important liver disease with major morbidity and mortality. The diagnosis of PSC is confirmed by magnetic resonance cholangiopancreaticography, and endoscopic retrograde cholangiopancreaticography is performed in patients needing therapeutic endoscopy. As a result of the unknown cause of the disease, current medical therapies are unsatisfactory. Nevertheless, high-dose ursodeoxycholic acid should be recommended for treatment of PSC patients because there is a trend toward increased survival. Dominant bile duct stenoses should be treated endoscopically. However, liver transplantation continues to be the only therapeutic option for patients with advanced disease. Estimation of prognosis and timing of liver transplantation should be determined individually for each PSC patient on the basis of all results. The diagnosis and treatment of cholangiocarcinoma (CC) still remain a challenge in PSC patients. Early diagnosis of CC certainly is a prerequisite for successful treatment with surgical resection or innovative strategies such as neoadjuvant radiochemotherapy with subsequent orthotopic liver transplantation. Therefore, endoscopic techniques such as cholangioscopy and/or intraductal ultrasound may be useful diagnostic tools in patients with stenoses suspicious for malignancy. Liver Transpl 14:735,746, 2008. © 2008. [source] Surgical complications and medium-term outcome results of tension-free vaginal tape: A prospective study of 313 consecutive patientsNEUROUROLOGY AND URODYNAMICS, Issue 1 2004Ishai Levin Abstract Objective A prospective study was undertaken to examine the incidence of surgical complications and medium-term outcomes of tension-free vaginal tape (TVT) surgery in a large, heterogeneous group of stress-incontinent women. Methods Surgery was tailored according to preoperative clinical and urodynamic findings: stress-incontinent women underwent TVT surgery, whereas those with concomitant urogenital prolapse underwent combined TVT and prolapse repair. Post-operatively the patients were scheduled for evaluation at 1, 3, 6, and 12 months, and annually thereafter. All underwent urodynamics at 3 months post-operatively. Results Three hundred and thirteen consecutive patients were prospectively studied. The mean follow-up period was 21.4,±,13.5 months. Sixteen (5.1%) cases of intravesical passage of the prolene tape occurred in our series, two of which were diagnosed at 3 and 15 months post-operatively. Eight (2.5%) patients had post-operative voiding difficulties, necessitating catheterization for more than 7 days. However, transvaginal excision of the tape was required in one case only. Vaginal erosion of the tape was diagnosed in four (1.3%) patients, all of whom were successfully treated by local excision of the eroded tape. Outcome analysis was restricted to 241 consecutive patients with at least 12 months of follow-up. Subjectively, 16 (6.6%) patients had persistent mild stress urinary incontinence, although urodynamics revealed asymptomatic sphincteric incontinence in 17 (7%) other patients. De-novo urge incontinence developed post-operatively in 20 (8.3%) patients. Conclusions The TVT procedure is associated with good medium-term cure rates, however, it is not free of troublesome complications and the patients should be informed accordingly. Only well-trained surgeons, familiar with pelvic anatomy, surgical alternatives, and endoscopic techniques should perform the operation. Neurourol. Urodynam. 23:7,9, 2004. © 2003 Wiley-Liss, Inc. [source] Surgical Outcomes of Drillout Procedures for Complex Frontal Sinus Pathology,THE LARYNGOSCOPE, Issue 5 2007Pete S. Batra MD Abstract Objectives: The purpose of this report is two-fold: 1) to determine the incidence and 2) to determine the efficacy of drillout procedures in the management of frontal sinus disease in a tertiary rhinology practice. Study Design: Retrospective data analysis. Methods: Chart review was performed for all patients undergoing frontal sinus surgery from May 1999 to April 2004. The incidence of drillout surgery was determined. Demographic data, symptomatology, type of drillout procedure, and primary pathology were determined. Postoperative outcome was assessed based on subjective symptomatology and objective endoscopic patency. Results: A total of 186 patients underwent 207 frontal sinus procedures during this time period; 25 patients (13.4%) required a total of 30 (14.5%) drillout procedures. The patient population had previously undergone an average of 3.2 procedures; four cases were primary and 26 were revision procedures. The breakdown of the procedures was as follows: Draf III, 17; Draf IIB, 7; and transseptal frontal sinusotomy, 6. The major indications included mucoceles (11 cases), chronic frontal sinusitis (6 cases), and tumors (5 cases). Postoperatively, presenting symptomatology resolved in 32%, improved in 56%, and remained unchanged in 12% of the patients. Endoscopic patency of the neo-ostium was noted in 23 cases (92%). Average follow-up was 16.3 months. Conclusions: In this series, drillout procedures were successfully used in 25 patients as an important adjunct to the standard endoscopic techniques for management of complex frontal sinus disease. Because the procedure was used only 30 times during a 5-year period, it was reserved for specific circumstances in carefully selected patients. [source] Safety of Minimally Invasive Pituitary Surgery (MIPS) Compared with a Traditional ApproachTHE LARYNGOSCOPE, Issue 11 2004David R. White MD Introduction: Transsphenoidal hypophysectomy is becoming progressively less invasive. Recent endoscopic techniques avoid nasal or intraoral incisions, use of nasal speculums, and nasal packing. Several case series of endoscopic endonasal pituitary surgery have been reported, but relatively little data exists comparing complication rates to more traditional approaches. We compare the complications of our first 50 cases of endoscopic, minimally invasive pituitary surgery (MIPS) to our last 50 sublabial transseptal (SLTS) procedures. Study Design: Retrospective case control study. Methods: Fifty consecutive MIPS procedures and 50 consecutive SLTS procedures were reviewed retrospectively. Complication rates were analyzed and compared. Results: Total complications per patient (P = .005), postoperative epistaxis (P = .031), lip anesthesia (P = .013), and deviated septum (P = .028) occurred more often in the SLTS group. No significant difference was seen in cerebrospinal fluid leak, meningitis, ophthalmoplegia, visual acuity loss, diabetes insipidus, intracranial hemorrhage, or death. In the MIPS group, length of stay (P < .001), use of lumbar drainage (P = .007), and nasal packing (P < .001) were also significantly reduced. Conclusions: Endoscopic endonasal pituitary surgery provides improved complication rates when compared with SLTS approaches. In addition, we note advantages of the MIPS approach, including reduced length of hospital stay and decreased use of lumbar drainage and nasal packing. [source] | ||||||||||