Abstract:
:The feasibility of infrared video imaging of subsurface vessels in the stomach was investigated both experimentally and in more detail using computer simulations of light propagation. Infrared video imaging was first attempted in several experimental situations. Images of a human arm illuminated with infrared light (wavelength > 700 nm) revealed subcutaneous venous structures not revealed by visible light (wavelength of 500 to 600 nm). An infrared-sensitive video endoscope was used to view both a human arm and normal stomach wall. Infrared illumination within the stomach enhanced only the larger subsurface vessels. Infrared transillumination of a rat skin flap window chamber allowed video recording of images during injection of an absorbing dye, indocyanine green, into the blood volume and showed that indocyanine green can enhance the contrast in infrared images of small vessels. Computer simulations of vessels of varying depths and sizes indicated successful detection was possible by infrared imaging. Computer simulations demonstrated that the shadow caused by an imaged subsurface vessel has two characteristics: (1) the central loss of reflectance, which indicates the size of the vessel, and (2) the full-width half-maximum of the reflectance loss, which indicates the depth of the vessel. The simulations further suggested that images of small vessels can be dramatically enhanced (68-fold) by indocyanine green, which attenuates the transmittance of scattered light from behind the vessels to the surface for observation. On the other hand, indocyanine green enhances the contrast of large vessels to a lesser degree (2.6-fold). The ultimate goal is to develop an endoscopic video imaging system capable of capturing reflected light from the stomach wall.(ABSTRACT TRUNCATED AT 250 WORDS)
journal_name
Gastrointest Endoscjournal_title
Gastrointestinal endoscopyauthors
Gostout CJ,Jacques SLdoi
10.1016/s0016-5107(95)70341-1subject
Has Abstractpub_date
1995-03-01 00:00:00pages
218-24issue
3eissn
0016-5107issn
1097-6779pii
S0016-5107(95)70341-1journal_volume
41pub_type
杂志文章abstract:BACKGROUND AND AIMS:Gastroparesis (GP) is a chronic debilitating condition. Prior pyloric-targeted procedures are either invasive or have questionable efficacy. Gastric peroral pyloromyotomy (G-POEM) has been proposed as a minimally invasive approach. We performed a pooled analysis to evaluate the efficacy and safety o...
journal_title:Gastrointestinal endoscopy
pub_type: 杂志文章,评审
doi:10.1016/j.gie.2019.11.039
更新日期:2020-04-01 00:00:00
abstract:BACKGROUND:The aim of this study was to compare use and tolerance of transnasal and transoral diagnostic endoscopy with small-diameter endoscopes in unsedated patients. METHODS:Patients being seen for diagnostic endoscopy were randomly assigned to have an unsedated transnasal or transoral procedure. Two prototype narr...
journal_title:Gastrointestinal endoscopy
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1016/s0016-5107(99)70003-9
更新日期:1999-03-01 00:00:00
abstract:BACKGROUND:Adenomatous colonic polyps are accepted as premalignant lesions. There is controversy regarding the significance of the hyperplastic polyp. The aim of this study was to determine the incidence of further polyps in patients with only hyperplastic polyps on a first colonoscopy in comparison with patients witho...
journal_title:Gastrointestinal endoscopy
pub_type: 杂志文章
doi:10.1016/s0016-5107(97)70058-0
更新日期:1997-08-01 00:00:00
abstract:BACKGROUND AND AIMS:Dysplasia within sessile serrated polyps (SSPs) is difficult to detect and may be mistaken for an adenoma, risking incomplete resection of the background serrated tissue, and is strongly implicated in interval cancer after colonoscopy. The use of endoscopic imaging to detect dysplasia within SSPs ha...
journal_title:Gastrointestinal endoscopy
pub_type: 杂志文章
doi:10.1016/j.gie.2017.06.031
更新日期:2018-01-01 00:00:00
abstract:BACKGROUND:Cholangitis is a major complication after metallic stent placement to treat biliary obstruction, and it may impair quality of life. Whether transpapillary stent placement contributes cholangitis is still controversial. OBJECTIVES:The present study aimed to determine risk factors for acute cholangitis after ...
journal_title:Gastrointestinal endoscopy
pub_type: 杂志文章
doi:10.1016/j.gie.2005.05.015
更新日期:2006-05-01 00:00:00
abstract::Colonoscopic removal of large, sessile polyps is difficult, but can be successfully carried out by experienced endoscopists. "Piecemeal" resection with an electrocautery snare was performed at our institution in 108 patients with 132 such lesions. The mean size of the unresected polyps was 3.0 cm. Complications occurr...
journal_title:Gastrointestinal endoscopy
pub_type: 杂志文章
doi:10.1016/s0016-5107(92)70421-0
更新日期:1992-05-01 00:00:00
abstract:BACKGROUND:Peroral cholangioscopy (POC) provides direct visualization of the bile duct and facilitates diagnostic procedures and therapeutic intervention. The currently available mother-baby endoscope system is not widely used because of several limitations. Although direct cholangioscopy with an ultraslim upper endosc...
journal_title:Gastrointestinal endoscopy
pub_type: 杂志文章
doi:10.1016/j.gie.2008.11.019
更新日期:2009-08-01 00:00:00
abstract:BACKGROUND:Despite advances in endoscopic treatment methods for upper GI hemorrhage, hemostasis is often difficult to achieve, particularly when the endoscopic view at the site of hemorrhage is poor because of the presence of mucus and blood. The investigators developed an end hood that facilitates endoscopic hemostati...
journal_title:Gastrointestinal endoscopy
pub_type: 杂志文章
doi:10.1067/mge.2003.206
更新日期:2003-05-01 00:00:00
abstract:BACKGROUND:Upper endoscopy provides information that can be used to predict complications and to facilitate clinical decisions for patients who have ingested corrosive substances. The role of EUS in corrosive injury has not been investigated. The aim of this study was to determine whether concurrent catheter-probe EUS ...
journal_title:Gastrointestinal endoscopy
pub_type: 杂志文章
doi:10.1016/s0016-5107(04)02031-0
更新日期:2004-11-01 00:00:00
abstract:BACKGROUND:EUS-guided fine needle aspiration (EUS-FNA) has significantly increased the diagnostic capability of EUS. FNA can also be helpful in the diagnosis of non-GI disorders. The role of EUS-FNA in the diagnosis of idiopathic abdominal masses has not been determined. This study evaluated the diagnostic accuracy of ...
journal_title:Gastrointestinal endoscopy
pub_type: 杂志文章,多中心研究
doi:10.1067/mge.2002.122956
更新日期:2002-06-01 00:00:00
abstract:BACKGROUND AND AIMS:EMR is the primary treatment of large laterally spreading lesions (LSLs) in the colon. Residual or recurrent adenoma (RRA) is a major limitation. We aimed to identify a robust method to stratify the risk of RRA. METHODS:Prospective multicenter data on consecutive LSLs ≥20 mm removed by piecemeal EM...
journal_title:Gastrointestinal endoscopy
pub_type: 杂志文章
doi:10.1016/j.gie.2016.11.027
更新日期:2017-03-01 00:00:00
abstract:BACKGROUND:Endoscopic papillectomy of benign papillary tumor is still not widely practiced. Intraductal growth has been considered a contraindication for endoscopic therapy. This prospective study evaluates endoscopic papillectomy for treatment of benign papillary tumors without and with intraductal growth. METHODS:Mo...
journal_title:Gastrointestinal endoscopy
pub_type: 杂志文章
doi:10.1016/j.gie.2005.04.053
更新日期:2005-10-01 00:00:00
abstract:BACKGROUND AND AIMS:Roux-en-Y gastric bypass (RYGB) is refractory to lifestyle and pharmacotherapy measures, requiring reversal of the patient's bariatric surgery. Reversal can lead to weight regain and recrudescence of their comorbidities. Our aim was to report a multicenter experience on the endoscopic management of ...
journal_title:Gastrointestinal endoscopy
pub_type: 杂志文章
doi:10.1016/j.gie.2020.02.029
更新日期:2020-07-01 00:00:00
abstract:BACKGROUND:Initial clinical applications have shown that US elastography might be able to distinguish tissues because of their specific consistency. OBJECTIVE:(1) To investigate the feasibility of EUS elastography of the pancreas and (2) to describe elastographic patterns of the normal pancreas and the pancreas affect...
journal_title:Gastrointestinal endoscopy
pub_type: 杂志文章
doi:10.1016/j.gie.2006.12.057
更新日期:2007-06-01 00:00:00
abstract:BACKGROUND AND AIMS:The cecal intubation rate (CIR) is a widely accepted key performance indicator (KPI) in colonoscopy but lacks a universal calculation method. We aimed to assess whether differences in CIR calculation methods could have an impact on perceived trainee outcomes. METHODS:A systematic review of CIR calc...
journal_title:Gastrointestinal endoscopy
pub_type: 杂志文章,meta分析
doi:10.1016/j.gie.2018.12.026
更新日期:2019-05-01 00:00:00
abstract:BACKGROUND:Radiation proctitis is a complication of radiotherapy for malignant pelvic disease. Argon beam coagulation is a new and rapidly evolving technology that permits a "no-touch" electrocoagulation of diseased tissue. METHODS:We analyzed retrospectively the records of 7 patients with prostatic and endometrial ca...
journal_title:Gastrointestinal endoscopy
pub_type: 杂志文章
doi:10.1016/s0016-5107(99)70054-4
更新日期:1999-04-01 00:00:00
abstract:BACKGROUND:Increased demand for screening colonoscopy necessitates improved efficiency in endoscopy units, especially more efficient use of existing resources. The purpose of this study was to assess the efficiency of the endoscopy unit of a large tertiary care teaching hospital. OBJECTIVE:To assess the efficiency of ...
journal_title:Gastrointestinal endoscopy
pub_type: 杂志文章
doi:10.1016/j.gie.2006.02.047
更新日期:2006-11-01 00:00:00
abstract::Endosonography was performed in 76 patients who had endoscopically detected gastroesophageal varices or questionable submucosal lesions, or who were being evaluated for pancreatic carcinoma or pancreatitis. The result were compared with surgery or autopsy results. The patients were divided retrospectively into four gr...
journal_title:Gastrointestinal endoscopy
pub_type: 杂志文章
doi:10.1016/s0016-5107(95)70071-4
更新日期:1995-08-01 00:00:00
abstract:BACKGROUND:The pharyngoesophageal segment commonly referred to as the upper esophageal sphincter (UES) generates a high-pressure zone (HPZ) between the pharynx and the esophagus. However, the exact anatomical components of the UES-HPZ remain incompletely determined. OBJECTIVE:To systematically define the US signature ...
journal_title:Gastrointestinal endoscopy
pub_type: 杂志文章
doi:10.1016/j.gie.2010.04.029
更新日期:2010-09-01 00:00:00
abstract:BACKGROUND:Detection of hepatic metastases during EUS is an important component of tumor staging. OBJECTIVE:To describe our experience with EUS-guided FNA (EUS-FNA) of solid hepatic masses and derive and validate criteria to help distinguish between benign and malignant hepatic masses. DESIGN:Retrospective study, sur...
journal_title:Gastrointestinal endoscopy
pub_type: 杂志文章
doi:10.1016/j.gie.2014.10.035
更新日期:2015-05-01 00:00:00
abstract:BACKGROUND AND AIMS:Almost all patients with familial adenomatous polyposis (FAP) develop duodenal adenomas, with a 4% to 18% risk of progression into duodenal cancer. Prophylactic endoscopic resection of duodenal adenomas may prevent cancer and is considered safer than surgical alternatives; however, data are limited....
journal_title:Gastrointestinal endoscopy
pub_type: 杂志文章
doi:10.1016/j.gie.2020.05.065
更新日期:2021-02-01 00:00:00
abstract:BACKGROUND:The endoscopic pattern of antral nodularity is a peculiar finding in children with Helicobacter pylori infection. The aim of this study was to determine whether this finding is related to more severe gastritis. METHODS:One hundred seventy-four consecutive children (median age 8.7 years) referred for gastros...
journal_title:Gastrointestinal endoscopy
pub_type: 杂志文章
doi:10.1067/mge.2001.111043
更新日期:2001-01-01 00:00:00
abstract:BACKGROUND:Unsedated endoscopy has not gained wide acceptance in the United States. Factors that may predict tolerance and acceptance of unsedated endoscopy are ill defined. METHODS:Outpatients referred for standard EGD were recruited to undergo unsedated ultrathin esophagoscopy (UUE) with a new 3.1-mm battery-powered...
journal_title:Gastrointestinal endoscopy
pub_type: 杂志文章
doi:10.1067/mge.2002.123274
更新日期:2002-05-01 00:00:00
abstract:BACKGROUND:Pancreatic stents may occlude with time, and there is little information available on the nature of the clogging process. METHODS:We analyzed the contents of occluded pancreatic polyethylene stents in nine patients with chronic pancreatitis. In the same patients, the protein patterns in the corresponding pa...
journal_title:Gastrointestinal endoscopy
pub_type: 杂志文章
doi:10.1016/s0016-5107(97)70302-x
更新日期:1997-01-01 00:00:00
abstract:BACKGROUND:Any innovative optical system that facilitates the early endoscopic detection of neoplastic change in the GI mucosa has the potential to greatly improve survival and quality of life for patients prone to have GI malignancies develop. The present article describes light-induced autofluorescence spectroscopy w...
journal_title:Gastrointestinal endoscopy
pub_type: 杂志文章
doi:10.1067/mge.2001.116563
更新日期:2001-08-01 00:00:00
abstract:BACKGROUND:Previous studies suggest that endoscopic balloon dilatation (BD) in gastric outlet obstruction (GOO) related to peptic ulcer disease (PUD) does not achieve long-term remission and most patients require surgery. Most of these studies have not systematically attempted to alter the natural history of the underl...
journal_title:Gastrointestinal endoscopy
pub_type: 杂志文章
doi:10.1016/j.gie.2006.11.016
更新日期:2007-09-01 00:00:00
abstract:BACKGROUND AND AIMS:During endoscopic submucosal dissection (ESD), a clear view is essential for precise dissection of the appropriate submucosal layer. Some advantages have been reported for underwater techniques of endoscopic resection in comparison with the gas insufflation method. We have developed a new ESD method...
journal_title:Gastrointestinal endoscopy
pub_type: 杂志文章
doi:10.1016/j.gie.2018.04.2331
更新日期:2018-08-01 00:00:00
abstract:BACKGROUND:The reported frequency of Barrett's esophagus (BE) in patients with reflux symptoms varies from 5% to 15%. The exact frequency of long-segment BE (LSBE) (>3 cm) and short-segment BE (SSBE) (<3 cm) in patients with chronic symptoms of GERD is uncertain. The aim of this study was to determine the frequency of ...
journal_title:Gastrointestinal endoscopy
pub_type: 杂志文章
doi:10.1016/s0016-5107(04)02589-1
更新日期:2005-02-01 00:00:00
abstract:BACKGROUND:The objective of this study was to compare the efficacy and safety of propofol and general anesthesia in children undergoing elective GI endoscopy. METHODS:The study design was prospective, randomized, and open label. Pediatric patients aged 2 to 21 years in whom elective GI endoscopy under general anesthes...
journal_title:Gastrointestinal endoscopy
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1067/mge.2002.120386
更新日期:2002-01-01 00:00:00
abstract:BACKGROUND:The effect of patient education on bowel preparation for colonoscopy has not been well studied. An improvement in patient understanding of the rationale for bowel preparation before colonoscopy might enhance adherence to the prescribed bowel regimen and improve bowel preparation quality. OBJECTIVE:To measur...
journal_title:Gastrointestinal endoscopy
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.gie.2010.10.013
更新日期:2011-02-01 00:00:00