# `HL7v2.Segment.OM4`
[🔗](https://github.com/Balneario-de-Cofrentes/hl7v2/blob/v3.10.1/lib/hl7v2/segment/om4.ex#L1)

Observations that Require Specimens (OM4) segment -- HL7v2 v2.5.1.

Contains attributes of observations that require specimens.
14 fields per HL7 v2.5.1 specification.

# `t`

```elixir
@type t() :: %HL7v2.Segment.OM4{
  additive: term(),
  container_description: term(),
  container_units: term(),
  container_volume: term(),
  derived_specimen: term(),
  extra_fields: term(),
  minimum_collection_volume: term(),
  normal_collection_volume: term(),
  preparation: term(),
  sequence_number: term(),
  special_handling_requirements: term(),
  specimen: term(),
  specimen_priorities: term(),
  specimen_requirements: term(),
  specimen_retention_time: term()
}
```

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*Consult [api-reference.md](api-reference.md) for complete listing*