Nikolaos Kalantzis

Learn More
Concentration of oxygen, methane, and hydrogen were measured in intracolonic gas samples aspirated through the colonoscope at the time of colonoscopy from 46 patients. Of the above patients 20 prepared either with mannitol (n = 10) or with castor oil (n = 10) had the instrument passed to the caecum without air insufflation or suction. After mannitol, mean(More)
INTRODUCTION Despite undergoing standard endoscopic diagnostic evaluation with eosophagogastroduodenoscopy and ileocolonoscopy, up to 30% of patients with iron deficiency anemia (IDA) have no definitive diagnosis. The aim of this study was to prospectively investigate the role of wireless capsule endoscopy (WCE) in detecting lesions of the small bowel in(More)
The contribution of endoscopic ultrasonography (EUS) in the diagnosis of benign lesions of the upper gastrointestinal (UGI) tract was studied in 46 patients with polypoid lesions which were not thought to have invaded adjacent tissues or organs. Precise visualization of the five layers of the UGI tract was possible with EUS. The site of origin of the tumour(More)
BACKGROUND   Overt and occult bleeding are the main indications for a wireless capsule endoscopy (WCE) study of the small bowel. Most published studies omit patients aged over 80. AIM   To determine whether WCE is feasible in patients with overt or occult bleeding over age 80 and to define the spectrum of small bowel pathologies in this age group. (More)
BACKGROUND The role of capsule endoscopy (CE) in the diagnosis of active mild-to-moderate GI bleeding (GIB) immediately after a negative EGD and ileocolonoscopy has not been prospectively evaluated. OBJECTIVE To estimate the diagnostic yield and clinical significance of CE in patients with acute, obscure, overt, mild-to-moderate GIB. DESIGN A(More)
BACKGROUND AND STUDY AIMS The Capsule Endoscopy Crohn's Disease Activity Index (CECDAI or Niv score) was devised to measure mucosal disease activity using video capsule endoscopy (VCE). The aim of the current study was to prospectively validate the use of the scoring system in daily practice. METHODS This was a multicenter, double-blind, prospective,(More)
Cisapride, a prokinetic drug with a novel mechanism of action, was compared with another prokinetic drug, metoclopramide, and an H2-blocker, ranitidine, in the treatment of nonulcer dyspepsia. In a double-blind study, 60 patients with severe dyspeptic symptoms received cisapride 5 mg TID, metoclopramide 10 mg TID, or ranitidine 150 mg BID for 8 weeks.(More)
BACKGROUND/AIMS The purpose of this study was to correlate blood flow velocity in the superior mesenteric artery and activity of ulcerative colitis. METHODOLOGY Doppler spectral analysis of superior mesenteric artery blood flow velocities were obtained in a blind study from 28 patients after fasting (A1: 13 patients with pancolitis, A2: 5 patients with(More)
Two fatal cases of amiodarone-induced acute, confluent, necrotic hepatitis are described. The patients, aged 28 and 60, had received a high loading dose of amiodarone. After the first and second day respectively following the administration of amiodarone, the patients developed jaundice, hepatomegaly, high serum transaminases, a prolonged prothrombin time(More)
The present study was undertaken to compare the efficacy of ranitidine 150 mg/nocte with that of antacids taken "on demand" in the prevention of recurrence of duodenal ulcer (DU). Two groups (A, B) of patients with DU recently healed by ranitidine or antacids were studied. Patients of Group A (110) healed by ranitidine were put on maintenance treatment with(More)