LOINC Code 19945-5: Gas flow FEV 25%-75% airway

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Gas flow at 25-75% of forced expiration. It is commonly used with the system or sample type Respiratory system.airway.

When is it used?

• Used in lab systems, EHRs, and clinical data exchange.
• May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
• Status: ACTIVE

What it does not mean

• The code identifies the observation or test, not the actual result.

Key facts

• Gas flow FEV 25%-75% airway
• Gas flow at 25-75% of forced expiration
• The mean forced expiratory flow between 25% and 75% of the Forced Vital Capacity (FVC), (FEF 25-75%) has also been known as the maximum mid-expiratory flow.
• Breathing; Dynamic; Exp; FEF 25-75%; Flow; Forced expiratory flow rate; Gases; Lung; Lungs; Point in time; PULMONARY; Pulmonology; QNT; Quan; Quant; Quantitative; Random; Respiratory; RS; Volume rate; vRate

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

Frequently asked questions