Example definition of serum or plasma specimen.

{
  "resourceType" : "SpecimenDefinition",
  "id" : "2364",
  "extension" : [{
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
    "valueCode" : "oo"
  }],
  "url" : "http://example.com/specdef/v1/12345",
  "identifier" : {
    "value" : "12345"
  },
  "title" : "Example Specimen Definition for Testing",
  "status" : "active",
  "experimental" : false,
  "publisher" : "HL7 International / Orders and Observations",
  "contact" : [{
    "telecom" : [{
      "system" : "url",
      "value" : "http://www.hl7.org/Special/committees/orders"
    }]
  }],
  "typeCollected" : {
    "coding" : [{
      "system" : "http://snomed.info/sct",
      "code" : "122555007",
      "display" : "Venous blood specimen"
    }]
  },
  "patientPreparation" : [{
    "text" : "12 hour fasting"
  },
  {
    "coding" : [{
      "system" : "http://snomed.info/sct",
      "code" : "263678003",
      "display" : "At rest"
    }]
  }],
  "timeAspect" : "preferrably morning time",
  "typeTested" : [{
    "isDerived" : false,
    "type" : {
      "coding" : [{
        "system" : "http://snomed.info/sct",
        "code" : "119364003",
        "display" : "Serum specimen"
      }]
    },
    "preference" : "preferred",
    "container" : {
      "material" : {
        "coding" : [{
          "system" : "http://snomed.info/sct",
          "code" : "61088005",
          "display" : "plastic"
        }]
      },
      "type" : {
        "coding" : [{
          "system" : "http://snomed.info/sct",
          "code" : "702281005",
          "display" : "Evacuated blood collection tube, thrombin/clot activator/gel separator"
        }]
      },
      "cap" : {
        "coding" : [{
          "system" : "urn:iso:std:iso:6710:2017",
          "code" : "yellow",
          "display" : "yellow cap"
        }]
      },
      "minimumVolumeQuantity" : {
        "value" : 2,
        "unit" : "ml",
        "system" : "http://unitsofmeasure.org",
        "code" : "mL"
      }
    },
    "handling" : [{
      "temperatureQualifier" : {
        "text" : "Ambient temperature"
      },
      "temperatureRange" : {
        "low" : {
          "value" : 15,
          "unit" : "°C",
          "system" : "http://unitsofmeasure.org",
          "code" : "Cel"
        },
        "high" : {
          "value" : 25,
          "unit" : "°C",
          "system" : "http://unitsofmeasure.org",
          "code" : "Cel"
        }
      },
      "maxDuration" : {
        "value" : 60,
        "unit" : "minute",
        "system" : "http://unitsofmeasure.org",
        "code" : "min"
      }
    },
    {
      "temperatureQualifier" : {
        "text" : "Refrigerated temperature"
      },
      "temperatureRange" : {
        "low" : {
          "value" : 2,
          "unit" : "°C",
          "system" : "http://unitsofmeasure.org",
          "code" : "Cel"
        },
        "high" : {
          "value" : 8,
          "unit" : "°C",
          "system" : "http://unitsofmeasure.org",
          "code" : "Cel"
        }
      },
      "maxDuration" : {
        "value" : 8,
        "unit" : "hour",
        "system" : "http://unitsofmeasure.org",
        "code" : "h"
      }
    }]
  },
  {
    "type" : {
      "coding" : [{
        "system" : "http://snomed.info/sct",
        "code" : "119361006",
        "display" : "Plasma specimen"
      }]
    },
    "preference" : "alternate",
    "container" : {
      "material" : {
        "coding" : [{
          "system" : "http://snomed.info/sct",
          "code" : "32039001",
          "display" : "glass"
        }]
      },
      "type" : {
        "coding" : [{
          "system" : "http://snomed.info/sct",
          "code" : "702281005",
          "display" : "Evacuated blood collection tube, thrombin/clot activator/gel separator"
        }]
      },
      "cap" : {
        "coding" : [{
          "system" : "urn:iso:std:iso:6710:2017",
          "code" : "green",
          "display" : "green cap"
        }]
      },
      "minimumVolumeQuantity" : {
        "value" : 2,
        "unit" : "ml",
        "system" : "http://unitsofmeasure.org",
        "code" : "mL"
      }
    },
    "rejectionCriterion" : [{
      "coding" : [{
        "system" : "http://terminology.hl7.org/CodeSystem/rejection-criteria",
        "code" : "insufficient",
        "display" : "insufficient specimen volume"
      }]
    },
    {
      "coding" : [{
        "system" : "http://terminology.hl7.org/CodeSystem/rejection-criteria",
        "code" : "hemolized",
        "display" : "hemolized specimen"
      }]
    }],
    "handling" : [{
      "temperatureQualifier" : {
        "text" : "Ambient temperature"
      },
      "temperatureRange" : {
        "low" : {
          "value" : 15,
          "unit" : "°C",
          "system" : "http://unitsofmeasure.org",
          "code" : "Cel"
        },
        "high" : {
          "value" : 25,
          "unit" : "°C",
          "system" : "http://unitsofmeasure.org",
          "code" : "Cel"
        }
      },
      "maxDuration" : {
        "value" : 60,
        "unit" : "minute",
        "system" : "http://unitsofmeasure.org",
        "code" : "min"
      }
    },
    {
      "temperatureQualifier" : {
        "text" : "Refrigerated temperature"
      },
      "temperatureRange" : {
        "low" : {
          "value" : 2,
          "unit" : "°C",
          "system" : "http://unitsofmeasure.org",
          "code" : "Cel"
        },
        "high" : {
          "value" : 8,
          "unit" : "°C",
          "system" : "http://unitsofmeasure.org",
          "code" : "Cel"
        }
      },
      "maxDuration" : {
        "value" : 8,
        "unit" : "hour",
        "system" : "http://unitsofmeasure.org",
        "code" : "h"
      }
    }]
  }]
}