Novel endoscopic technologies: narrow band imaging

Traditional and Modern Diagnostic Approaches in Diagnosing Pediatric Helicobacter pylori Infection

Helicobacter pylori (H. pylori) is the most common bacterial infection worldwide, is usually acquired during childhood and is related to gastric carcinogenesis during adulthood. Therefore, its early proper diagnosis and subsequent successful eradication represent the cornerstones of gastric cancer prevention. The aim of this narrative review was to assess traditional and modern diagnostic methods in terms of H. pylori diagnosis. Several invasive and non-invasive methods were described, each with its pros and cons. The invasive diagnostic methods comprise endoscopy with biopsy, rapid urease tests, histopathological exams, cultures and biopsy-based molecular tests. Among these, probably the most available, accurate and cost-effective test remains histology, albeit molecular tests definitely remain the most accurate despite their high costs. The non-invasive tests consist of urea breath tests, serology, stool antigens and non-invasive molecular tests. Urea breath tests and stool antigens are the most useful in clinical practice both for the diagnosis of H. pylori infection and for monitoring the eradication of this infection after therapy. The challenges related to accurate diagnosis lead to a choice that must be based on H. pylori virulence, environmental factors and host peculiarities.

CO2 insufflation during colonoscopy decreases post-interventional pain in deeply sedated patients: a randomized controlled trial

INTRODUCTION

Air insufflation during colonoscopy is considered the standard method in most endoscopic centers. Notably, several studies have reported reduced abdominal pain after colonoscopy with CO2 insufflation in unsedated and in lightly sedated patients. The present study was designed to assess the efficacy of CO2 insufflation after colonoscopy in moderately and deeply sedated patients. We also evaluated whether CO2 insufflation increases patients' compliance for colorectal cancer screening.

PATIENTS AND METHODS

A total of 300 consecutive patients allocated to colonoscopy were randomly assigned to either CO2 or air insufflation. Propofol was titrated to a level of deep sedation and propofol combined with midazolam was used for moderate sedation. Post-interventional pain levels and satisfaction with the procedure were registered on a 10-point visual analog scale. Compliance for colorectal cancer screening was ascertained separately.

RESULTS

CO2 insufflation was used during colonoscopy in 157 patients; conventional air was used in 143 patients. The two groups were comparable with regard to age, sex and body mass index. Neither major nor minor complications were observed. Pain sensation was significantly lower in the CO2 group at 15 min, 30 min and 6 h after colonoscopy (P<0.01); at 12 h no difference was observed. In contrast, levels of patient satisfaction did not show any significant difference. Voluntary colorectal cancer screening appeared not to be influenced by the type of insufflation gas used.

CONCLUSIONS

CO2 insufflation in deeply and moderately sedated patients during colonoscopy has no impact on patients' satisfaction with the procedure or on their attitude to voluntary colorectal cancer screening. However, the use of CO2 insufflation significantly diminishes abdominal pain after colonoscopy.