Status: current, Not sufficiently defined by necessary conditions definition status (core metadata concept). Date: 31-Jul 2004. Module: SNOMED CT core
Descriptions:
| Outbound Relationships | Type | Target | Active | Characteristic | Refinability | Group | Values | 
| Nonvalved ophthalmic drainage device (physical object) | Is a | Anterior chamber drainage tube | true | Inferred relationship | Some | 
| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Molteno tube | Is a | True | Nonvalved ophthalmic drainage device (physical object) | Inferred relationship | Some | |
| Schocket tube | Is a | True | Nonvalved ophthalmic drainage device (physical object) | Inferred relationship | Some | |
| Baerveldt tube shunt | Is a | False | Nonvalved ophthalmic drainage device (physical object) | Inferred relationship | Some | 
This concept is not in any reference sets