| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Drainage of ventricle through previously implanted catheter | Using | False | Ventricular intracranial catheter, device | Inferred relationship | Existential restriction modifier |  | 
| Drainage of ventricle through previously implanted catheter | Direct device | False | Ventricular intracranial catheter, device | Inferred relationship | Existential restriction modifier |  | 
| Drainage of ventricle through previously implanted catheter | Using | False | Ventricular intracranial catheter, device | Inferred relationship | Existential restriction modifier |  | 
| Renewal of proximal catheter of ventricular shunt | Direct device | False | Ventricular intracranial catheter, device | Inferred relationship | Existential restriction modifier | 2 | 
| Renewal of distal catheter of ventricular shunt | Direct device | False | Ventricular intracranial catheter, device | Inferred relationship | Existential restriction modifier | 2 | 
| Replacement of ventricular catheter | Direct device | False | Ventricular intracranial catheter, device | Inferred relationship | Existential restriction modifier | 1 | 
| Removal of ventricular catheter with synchronous replacement | Direct device | True | Ventricular intracranial catheter, device | Inferred relationship | Existential restriction modifier | 1 | 
| Drainage of ventricle through previously implanted catheter | Using device | False | Ventricular intracranial catheter, device | Inferred relationship | Existential restriction modifier | 1 | 
| Irrigation of ventricular catheter | Direct device | False | Ventricular intracranial catheter, device | Inferred relationship | Existential restriction modifier | 1 | 
| Removal of cerebral ventricular catheter | Direct device | False | Ventricular intracranial catheter, device | Inferred relationship | Existential restriction modifier | 1 | 
| Removal of cerebral ventricular catheter | Direct device | False | Ventricular intracranial catheter, device | Inferred relationship | Existential restriction modifier | 1 | 
| Removal of ventricular catheter with synchronous replacement | Direct device | False | Ventricular intracranial catheter, device | Inferred relationship | Existential restriction modifier | 2 | 
| Irrigation of ventricular catheter | Direct device | False | Ventricular intracranial catheter, device | Inferred relationship | Existential restriction modifier | 1 | 
| Replacement of ventricular catheter | Direct device | True | Ventricular intracranial catheter, device | Inferred relationship | Existential restriction modifier | 1 | 
| Drainage of ventricle through previously implanted catheter | Using device | True | Ventricular intracranial catheter, device | Inferred relationship | Existential restriction modifier | 1 | 
| Removal of cerebral ventricular catheter | Direct device | True | Ventricular intracranial catheter, device | Inferred relationship | Existential restriction modifier | 1 | 
| Insertion of catheter into brain ventricle | Direct device | False | Ventricular intracranial catheter, device | Inferred relationship | Existential restriction modifier | 1 | 
| Insertion of catheter into brain ventricle | Direct device | True | Ventricular intracranial catheter, device | Inferred relationship | Existential restriction modifier | 1 | 
| Intracranial ventricular catheter submitted as specimen | Specimen source identity | False | Ventricular intracranial catheter, device | Inferred relationship | Existential restriction modifier | 1 | 
| Intracranial ventricular catheter submitted as specimen | Specimen substance | True | Ventricular intracranial catheter, device | Inferred relationship | Existential restriction modifier | 1 | 
| Irrigation of ventricular intracranial catheter | Direct device | True | Ventricular intracranial catheter, device | Inferred relationship | Existential restriction modifier | 1 |