Definition for Code SystemSubstanceMeasurementTypeExample

{
  "resourceType" : "CodeSystem",
  "id" : "substance-measurement-type",
  "meta" : {
    "lastUpdated" : "2026-06-23T16:20:19.822+00:00"
  },
  "text" : {
    "status" : "generated",
    "div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\"><p class=\"res-header-id\"><b>Generated Narrative: CodeSystem substance-measurement-type</b></p><a name=\"substance-measurement-type\"> </a><a name=\"hcsubstance-measurement-type\"> </a><p>This case-sensitive code system <code>http://hl7.org/fhir/substance-measurement-type</code> defines the following codes:</p><table class=\"codes\"><tr><td style=\"white-space:nowrap\"><b>Code</b></td><td><b>Display</b></td><td><b>Definition</b></td></tr><tr><td style=\"white-space:nowrap\">ic50<a name=\"substance-measurement-type-ic50\"> </a></td><td>IC50</td><td>Half maximal inhibitory concentration.</td></tr><tr><td style=\"white-space:nowrap\">ec50<a name=\"substance-measurement-type-ec50\"> </a></td><td>EC50</td><td>Half maximal effective concentration.</td></tr><tr><td style=\"white-space:nowrap\">kd<a name=\"substance-measurement-type-kd\"> </a></td><td>Kd</td><td>Equilibrium dissociation constant.</td></tr><tr><td style=\"white-space:nowrap\">ki<a name=\"substance-measurement-type-ki\"> </a></td><td>Ki</td><td>Inhibition constant.</td></tr><tr><td style=\"white-space:nowrap\">km<a name=\"substance-measurement-type-km\"> </a></td><td>Km</td><td>Michaelis constant.</td></tr><tr><td style=\"white-space:nowrap\">kon<a name=\"substance-measurement-type-kon\"> </a></td><td>Kon</td><td>Association rate constant.</td></tr><tr><td style=\"white-space:nowrap\">koff<a name=\"substance-measurement-type-koff\"> </a></td><td>Koff</td><td>Dissociation rate constant.</td></tr><tr><td style=\"white-space:nowrap\">mole-ratio<a name=\"substance-measurement-type-mole-ratio\"> </a></td><td>Mole ratio</td><td>Ratio expressed in moles.</td></tr><tr><td style=\"white-space:nowrap\">weight-ratio<a name=\"substance-measurement-type-weight-ratio\"> </a></td><td>Weight ratio</td><td>Ratio expressed by weight (mass).</td></tr></table></div>"
  },
  "extension" : [{
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
    "valueCode" : "brr"
  },
  {
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status",
    "valueCode" : "informative"
  },
  {
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
    "valueInteger" : 1
  }],
  "url" : "http://hl7.org/fhir/substance-measurement-type",
  "version" : "6.0.0-ballot4",
  "name" : "SubstanceMeasurementTypeExample",
  "title" : "Substance Measurement Type",
  "status" : "active",
  "experimental" : true,
  "date" : "2026-06-23",
  "publisher" : "HL7 (FHIR Project)",
  "contact" : [{
    "telecom" : [{
      "system" : "url",
      "value" : "http://hl7.org/fhir"
    },
    {
      "system" : "email",
      "value" : "fhir@lists.hl7.org"
    }]
  }],
  "description" : "The kind of numeric measurement being recorded for a substance amount or relationship, e.g. IC50, Kd, mole ratio.",
  "jurisdiction" : [{
    "coding" : [{
      "system" : "http://unstats.un.org/unsd/methods/m49/m49.htm",
      "code" : "001",
      "display" : "World"
    }]
  }],
  "caseSensitive" : true,
  "valueSet" : "http://hl7.org/fhir/ValueSet/substance-measurement-type",
  "content" : "complete",
  "concept" : [{
    "code" : "ic50",
    "display" : "IC50",
    "definition" : "Half maximal inhibitory concentration."
  },
  {
    "code" : "ec50",
    "display" : "EC50",
    "definition" : "Half maximal effective concentration."
  },
  {
    "code" : "kd",
    "display" : "Kd",
    "definition" : "Equilibrium dissociation constant."
  },
  {
    "code" : "ki",
    "display" : "Ki",
    "definition" : "Inhibition constant."
  },
  {
    "code" : "km",
    "display" : "Km",
    "definition" : "Michaelis constant."
  },
  {
    "code" : "kon",
    "display" : "Kon",
    "definition" : "Association rate constant."
  },
  {
    "code" : "koff",
    "display" : "Koff",
    "definition" : "Dissociation rate constant."
  },
  {
    "code" : "mole-ratio",
    "display" : "Mole ratio",
    "definition" : "Ratio expressed in moles."
  },
  {
    "code" : "weight-ratio",
    "display" : "Weight ratio",
    "definition" : "Ratio expressed by weight (mass)."
  }]
}