Sentence examples for a trace of obstruction from inspiring English sources

The phrase "a trace of obstruction" is correct and usable in written English.
It can be used in contexts where you are describing a small or minimal amount of blockage or hindrance, often in medical, technical, or metaphorical discussions.
Example: "The doctor noted a trace of obstruction in the patient's airway, which required further examination."
Alternatives: "a hint of blockage" or "a small amount of interference."