| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Armored endotracheal tube | Is a | True | Endotracheal tube, device | Inferred relationship | Existential restriction modifier |  | 
| RAE endotracheal tube | Is a | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier |  | 
| Oxford endotracheal tube | Is a | True | Endotracheal tube, device | Inferred relationship | Existential restriction modifier |  | 
| Endotracheal tube suction | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Check endotracheal tube is secure | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 2 | 
| Checking position of endotracheal tube | Direct device | True | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Changing endotracheal tube | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier |  | 
| Changing endotracheal tube headband | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 2 | 
| Orotracheal intubation | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Oral intubation awake | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Tracheal intubation through a laryngeal mask airway | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier |  | 
| Tracheal intubation using rigid bronchoscope | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier |  | 
| Orotracheal fiberoptic intubation | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Nasotracheal intubation | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Nasal intubation awake | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Blind nasal intubation | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Nasotracheal fiberoptic intubation | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Removal of endotracheal tube | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Suction and cleaning of endotracheal tube | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Specimen from endotracheal tube | Specimen source identity | True | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Changing endotracheal tube headband | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Changing endotracheal tube headband | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 3 | 
| Endotracheal tube suction | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 2 | 
| Endotracheal tube suction | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 3 | 
| Suction and cleaning of endotracheal tube | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 2 | 
| Intermittent positive pressure ventilation via endotracheal tube | Using | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Reposition endotracheal tube | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 2 | 
| Reposition endotracheal tube | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 3 | 
| Changing endotracheal tube tapes | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Tube care: endotracheal | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Changing endotracheal tube headband | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Changing endotracheal tube headband | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 3 | 
| Changing endotracheal tube headband | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 2 | 
| Endotracheal tube suction | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Endotracheal tube suction | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 3 | 
| Endotracheal tube suction | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 2 | 
| Suction and cleaning of endotracheal tube | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Suction and cleaning of endotracheal tube | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 2 | 
| Reposition endotracheal tube | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Reposition endotracheal tube | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 3 | 
| Ventilating tube removal by another physician | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Changing endotracheal tube headband | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Changing endotracheal tube headband | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 3 | 
| Changing endotracheal tube headband | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 2 | 
| Endotracheal tube suction | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Endotracheal tube suction | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 2 | 
| Endotracheal tube suction | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 3 | 
| Suction and cleaning of endotracheal tube | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Suction and cleaning of endotracheal tube | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 2 | 
| Reposition endotracheal tube | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 3 | 
| Reposition endotracheal tube | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 2 | 
| Changing endotracheal tube headband | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 2 | 
| Changing endotracheal tube headband | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 3 | 
| Changing endotracheal tube headband | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Endotracheal tube suction | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Endotracheal tube suction | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 3 | 
| Endotracheal tube suction | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 2 | 
| Suction and cleaning of endotracheal tube | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Suction and cleaning of endotracheal tube | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 2 | 
| Reposition endotracheal tube | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 3 | 
| Reposition endotracheal tube | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Preformed endotracheal tube | Is a | True | Endotracheal tube, device | Inferred relationship | Existential restriction modifier |  | 
| Magill type endotracheal tube | Is a | True | Endotracheal tube, device | Inferred relationship | Existential restriction modifier |  | 
| Changing endotracheal tube headband | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Changing endotracheal tube headband | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 2 | 
| Changing endotracheal tube headband | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 3 | 
| Endotracheal tube suction | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 3 | 
| Endotracheal tube suction | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Endotracheal tube suction | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 2 | 
| Suction and cleaning of endotracheal tube | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Suction and cleaning of endotracheal tube | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Reposition endotracheal tube | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Reposition endotracheal tube | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 2 | 
| Intermittent positive pressure ventilation via endotracheal tube | Using device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Endotracheal tube suction | Indirect device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Changing endotracheal tube | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Tracheal intubation using rigid bronchoscope | Direct device | True | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 2 | 
| Insertion of tracheostomy tube | Direct device | True | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 2 | 
| Insertion of tracheal T-tube | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Insertion of endotracheal tube | Direct device | True | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Awake intubation | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Endotracheal intubation, emergency procedure | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Changing tracheostomy tube | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 2 | 
| Transglottic catheterization of trachea | Direct device | True | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 2 | 
| Emergency laryngeal intubation | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Endotracheal intubation NOS | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Tracheal intubation through a laryngeal mask airway | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Changing endotracheal tube headband | Direct device | True | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Changing endotracheal tube headband | Direct device | True | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 2 | 
| Check endotracheal tube is secure | Direct device | True | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Check endotracheal tube is secure | Direct device | True | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 2 | 
| Checking position of endotracheal tube | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Checking position of endotracheal tube | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 2 | 
| Securing endotracheal tube using tape | Direct device | True | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Manual securing of endotracheal tube | Direct device | True | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Securing endotracheal tube using holder | Direct device | True | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Insertion of endotracheal tube using laryngoscope | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Endotracheal tube with bronchial blocker | Is a | True | Endotracheal tube, device | Inferred relationship | Existential restriction modifier |  | 
| Endotracheal tube suction | Indirect device | True | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Orotracheal intubation | Direct device | True | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 | 
| Insertion of endotracheal tube | Direct device | False | Endotracheal tube, device | Inferred relationship | Existential restriction modifier | 1 |