High ALP levels can occur if the bile ducts are obstructed. It tends to occur if the bile duct is already partially obstructed by gallstones. Stridor is a physical sign which is caused by a narrowed or obstructed airway. Debris-choked roads obstructed fire fighters. Many conditions are associated with obstructed airways. Anismus occurs in a small minority of persons with chronic constipation or obstructed defecation. Rectocele can be a cause of symptoms of obstructed defecation. Furthermore, the arteries in his right arm were still obstructed. Objects can even be recognized when they are partially obstructed from view. The bayou had been obstructed with debris. Tenesmus is a closely related topic to obstructed defecation. Roads were obstructed by both floodwaters and fallen objects. Several of them have obstructed the river, and caused large, temporary lakes. Ports are obstructed by the valve member or disc to control flow. A pilonidal cyst is a pilonidal sinus that is obstructed.