Can a ct scan with contrast and iv contrast show if a vaginal mesh sling is too tight or broken?

Probably not: They are very hard to see with ct. Centers that are expert in this field sometimes do specialized ultrasound with fluid infusion during the scan to visualize the mesh.

No: If your sling or mesh is too tight, then you will have issues with difficult urination, abnormal urination, and/or pain (most commonly). No imaging study can show how 'tight' a sling is. It is very difficult to properly visualize mesh products for defects with any imaging modality currently. The best evaluation is a proper history and thorough examination, and possibly urodynamic studies.