Summary of level of evidence and grade of recommendation as suggested in the British Thoracic Society guidelines [5]
| Procedure | Level of evidence | Grade of recommendation | Ref. |
| Perform coagulation studies, platelet count and haemoglobin concentration when there are clinical risk factors for abnormal coagulation | 3 | D | [5] |
| Degree of bleeding is higher after TBLB than EBB | 3 | [1] | |
| LTX recipiens are more likely to bleed after TBLBs (not explained by clotting values or aspirin use) | 3 | [24] | |
| Inspection and BAL can be performed in severely thrombocytopenic patients (platelet >20 000×109 per L−1) | 3 | D | [10] |
| Acetylsalicylic acid has not been shown to increase the risk of TBLB-related bleeding | C | [8] | |
| Clopidogrel has been associated with a significant increase in the frequency of clinically significant bleeding after TBLB | 2 | C | [35] |
TBLB: transbronchial lung biopsy; EBB: endobronchial biopsy; LTX: lung transplant; BAL: bronchoalveolar lavage.