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Unified Medical Language System® (UMLS®)

2011AA Perioperative Nursing Data Set Source Information


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Term Type Description Count (MRCONSO.RRF)
PT Designated preferred name 190
HT Hierarchical term 9


  • A term type indicates the role an atom plays in its source
  • An atom is the smallest unit of naming in a source; that is, a specific string with specific code values and identifiers from a specific source.
  • Every atom has a separate row in MRCONSO.RRF. Every atom is assigned a term type.
  • Term types are assigned based on source documentation or NLM understanding of the source.
  • Sample data are provided for every term type in the source (see below).
  • See Metathesaurus Documentation for a list of all term type abbreviations and their full names.
  • See Metathesaurus Documentation for a list of sources and their associated term types, listed in default order of precedence.
  • See Section 2.3 of the UMLS Reference Manual for more information on terms and term types in the UMLS Metathesaurus.

Sample Data


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C1546306 A18716336 L5522408 S11968027 A.20 A.20 Verifies operative procedure, surgical site, and laterality
C1269736 A18716484 L2973451 S3614065 A.20.1 A.20.1 Verifies consent for planned procedure
C1269814 A18716311 L2860719 S3557477 A.200.1 A.200.1 Assesses risk for inadvertent hypothermia
C2945772 A18716310 L9525900 S11967917 A.200.2 A.200.2 Assesses risk for inadvertent hyperthermia
C1546267 A18716407 L5522362 S11967945 A.220 A.220 Identifies baseline cardiac status
C2945773 A18716385 L9525945 S11968022 A.220.1 A.220.1 Reports the presence of implantable cardiac devices
C1269818 A18716460 L2860705 S3557418 A.240.1 A.240.1 Assesses history of previous radiation exposure
C1269820 A18716405 L2860635 S3557388 A.250 A.250 Assesses baseline neurological status
C2945777 A18716358 L9525941 S11967947 A.260 A.260 Identifies baseline gastrointestinal status


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C0036043 A8311251 L0036043 S0083679 D1 D1 Safety
C1546213 A8311380 L5522412 S6317332 D2 D2 Physiologic Responses
C1546214 A8311464 L5522366 S6317416 D3-A D3-A Behavioral Responses - Patient and Family: Knowledge
C1546215 A8311465 L5522365 S6317417 D3-B D3-B Behavioral Responses - Patient and Family: Rights/Ethics
C1261322 A18716434 L1007288 S1209917 MTHU000001 MTHU000001 Assessment
C1261322 A18716288 L0015192 S0039489 MTHU000002 MTHU000002 Evaluation
C1708476 A18716433 L6055971 S6939832 MTHU000003 MTHU000003 Implementation
C1274040 A18716387 L5373078 S6136821 MTHU000004 MTHU000004 Outcome
C1456613 A18716314 L5189360 S5926707 D4 D4 Health System