A 72-year-old woman with COPD and severe kyphosis is admitted to the ICU with acute respiratory failure requiring mechanical ventilation. She is sedated and paralyzed on a ventilator. After 14 days of intubation, the team decides to perform a tracheostomy to facilitate weaning and reduce sedation. On postoperative day 3, the nursing staff reports blood-stained secretions from the tracheostomy tube and a small amount of bright red blood trickling from the stoma. The patient is hemodynamically stable and afebrile. Which of the following is the most likely complication and the most appropriate immediate management?