Table 2. Classification of lower airway FM.
| Source/type, total N=80 [%] | Risks, n [%] | Specific FMs |
|---|---|---|
| Exogenous/organic matter, 25 [31.3] | Aspiration, 15 [18.8] | Chicken bone, 3 |
| Fish bone, 2 | ||
| Nuts, popcorn, seeds, 5 | ||
| Vegetables, 3 | ||
| Apple, 2 | ||
| Fish ball, 1 | ||
| Unspecified food, 9 | ||
| Exogenous/inorganic matter, 37 [46.3] | Aspiration, 2 [2.5] | Pill, 2 |
| Talc powder, 1 | ||
| Pin, 1 | ||
| Metallic fragment, 1 | ||
| Thumbtack, 1 | ||
| Spoon handle, 1* | ||
| Iatrogenic, 30 [37.5] | Stents, 24* | |
| Sutures, 4* | ||
| Voice prosthesis, 2 | ||
| Endogenous matter, 18 [22.4] | Aspiration, 12 [15] | Bronchiolithiasis, 1 |
| Jaw bone, 1* | ||
| Tooth, 2 | ||
| Blood clots, 4** | ||
| Mucus plugs, 10** |
*, all stents, 2 sutures, 1 fragment of jaw bone could only be removed with the rigid bronchoscope; **, all with partial or complete lung collapse. FM, foreign matter.