Is there a test to confirm rib cartilage tear?my wife has been in constant pain for two years, reaching for a box while on a ladder, she felt a pop

No: While there is no specific test for intercostal (rib) muscle tear, the specific area of pain can be targeted with intercostal nerve block . This pain is sharp and stabbing, and may radiate from the back to the front of the chest wall. In addition, a good manual therapist should evaluate rib motion. Your wife may have a rib motion dysfunction, which can occur on inhalation or exhalation.