Ventilation mask adapted for endoscopy during the COVID-19 pandemic.

In the context of the COVID-19 pandemic, endoscopy services must adopt preventive measures to maintain proper functioning due to a high risk of disease contagion. Triage protocols before and after the procedure, personal protective equipment, and environmental contamination control are some of the endoscopy society's recommendations. However, the risk of infection may remain high due to poor control over the source of contamination.

Cytomegaloviral colitis in HIV positive patients: endoscopic findings.

Background: Diarrhea in seropositive human immunodeficiency virus patients is one of the most important and disabling symptoms, and often decreases their quality of life. Cytomegalovirus colitis is among the principal causes of this symptom and colonoscopy is the gold standard examination to diagnose it.

Aim: To define the main endoscopic findings in seropositive human immunodeficiency virus patients with cytomegalovirus colitis.

Magnifying colonoscopy: interobserver agreement in the assessment of colonic pit patterns and its correlation with histopathological findings.

Background And Study Aims: Magnifying colonoscopy (MC) is recognized as an aid to the differential diagnosis between neoplastic and nonneoplastic lesions. This study evaluated interobserver agreement of experienced endoscopists in the assessment of colonic pit patterns through the Kudo's classification and correlated morphological aspects with histopathological findings.

Materials And Methods: A total of 213 magnification chromoendoscopic pictures of colonic lesions were collected from 161 consecutive patients and presented to three independent observers who expressed opinion about predominant pit pattern.

Use of a homemade nylon loop for the prevention of postpolypectomy bleeding of large pedunculated polyps.

To avoid bleeding after colonoscopic polypectomy, several procedures are being used. We describe a new method that consists of a homemade nylon loop that is applied and tied to the stalk of the pedunculated polyp and after which a conventional polypectomy is done. We have used this method in 15 patients and no complication was observed.

[High resolution chromoendoscopy in the differential diagnosis of neoplastic and non-neoplastic polyps].

Background: Magnifying colonoscopy brought the possibility of precise histologic diagnosis of colorectal lesions through their surface appearance. Despite the high accuracy of magnifying colonoscopy it is a specialized and expensive equipment not available in most medical centers. Due to these reasons the use of conventional colonoscopy with chromoscopy has been raised because this produce can reproduce most of the information previously obtained by magnifying colonoscopy.