Status: current, Not sufficiently defined by necessary conditions definition status (core metadata concept). Date: 31-Jan 2002. Module: SNOMED CT core
Descriptions:
| Outbound Relationships | Type | Target | Active | Characteristic | Refinability | Group | Values |
| Lacrimal patency | Is a | Feature of lacrimation | false | Inferred relationship | Some | ||
| Lacrimal patency | Finding site | Lacrimal apparatus structure | false | Inferred relationship | Some | ||
| Lacrimal patency | Is a | Lacrimal drainage system observable (observable entity) | true | Inferred relationship | Some |
| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group |
| Lacrimal drainage - freely patent | Interprets | True | Lacrimal patency | Inferred relationship | Some | 1 |
| Lacrimal drainage - reduced patency | Interprets | True | Lacrimal patency | Inferred relationship | Some | 2 |
| Lacrimal drainage - patent only on punctal occlusion | Interprets | True | Lacrimal patency | Inferred relationship | Some | 2 |
| Lacrimal drainage - not patent | Interprets | True | Lacrimal patency | Inferred relationship | Some | 2 |
| Lacrimal patency - finding | Interprets | True | Lacrimal patency | Inferred relationship | Some | 1 |
| Lacrimal drainage - freely patent | Interprets | False | Lacrimal patency | Inferred relationship | Some | 1 |
This concept is not in any reference sets