Pulmonary Function Testing: An Interoperability on FHIR Implementation Guide
0.1.0 - ci-build

Pulmonary Function Testing: An Interoperability on FHIR Implementation Guide - Local Development build (v0.1.0). See the Directory of published versions

Coding Gaps

This list is non-exhaustive; an observation’s omission does not imply there exists a specific code for it.

The primary issues for most observations are that “measured/predicted” and “z-score” are missing. Some observations also have ambiguous codes, where there they cannot be specified as pre or post bronchodilation.

Table of gaps

Observation URI Issue Note
       
Spirometry      
FVC z-score - Missing  
FVC mL change - Missing  
FEV1 z-score - Missing  
FEV1 measured/predicted https://loinc.org/20152-5/ Ambiguous No pre/post
FEV1/FVC https://loinc.org/19926-5/ Ambiguous No pre/post
FEV1/FVC z-score - Missing  
Forced expiratory time https://loinc.org/65819-5/ Ambiguous No pre/post
       
Diffusing capacity      
Diffusion capacity.carbon monoxide https://loinc.org/19911-7 Ambiguous No pre/post
DLCO (at standard P_B) - Missing  
DLCO (at standard P_B) z-score - Missing  
DLCO (at standard P_B )measured/predicted - Missing  
DLCO (pred adj Hb 13.8 g/dL) - Missing  
DLCO (pred adj Hb 13.8 g/dL) z-score - Missing  
DLCO (pred adj Hb 13.8 g/dL) measured/predicted - Missing  
Alveolar Volume (V_A) http://snomed.info/id/251953007 Missing Has SNOMED
Alveolar Volume (V_A) z-score - Missing  
Alveolar Volume (V_A) measured/predicted - Missing  
Total lung capacity by Helium single breath https://loinc.org/19858-0 Ambiguous No pre/post
Inspired volume/vital capacity (V_I/V_C) - Missing  
Diffusion capacity/Alveolar volume z-score - Missing  
Diffusion capacity/Alveolar volume measured/predicted - Missing  

Note: “Diffusion capacity/Alveolar volume” is alternatively written as “DLCO/VA”, or “KCO”

Inconsistent: These codes are accurate, but the LOINC long names aren’t consistent.

  • “Percent change” LOINC names differ:
    • ForcedVitalCapacity_PostBronchodilator_percentChange has LOINC name “FVC percent change Respiratory system” (https://loinc.org/69982-7).
    • FEV1_POST_change_percent has LOINC name “FEV1 percent change” (https://loinc.org/69983-5/).

SNOMED

Some observations which lack LOINC codes may have SNOMED codes. The SNOMED concept “Respiratory measure (observable entity)” has children corresponding to various pulmonary function test measures.