Premedication with pronase or N-acetylcysteine improves visibility during gastroendoscopy: An endoscopist-blinded, prospective, randomized study

Figure 1 Mucosal visibility scores evaluated during UGI endoscopy. (A) Score 1: No adherent mucus on the gastric mucosa; (B) Score 2: a small amount of mucus on the gastric mucosa without obscuring the vision; (C) Score 3: a large amount of mucus on the gastric mucosa, which took less than 50 mL of water to clear; and (D) Score 4: a large amount of mucus on the gastric mucosa, which took more than 50 mL of water to clear.

Figure 2 Total mucosal visibility score of each group. ^bP < 0.01 vs groups A and B; ^dP < 0.01 vs group A, ^aP = 0.06 vs group B.