LOINCActiveObservation

LOINC Code 78945-3: Catheterization device Guiding catheter size

78945-3 is a LOINC code used to identify Catheterization device Guiding catheter size in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Guiding catheter size. It is commonly used with the system or sample type Catheterization device.

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

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 Guiding catheter size. It is commonly used with the system or sample type Catheterization device.

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
  • Order vs observation: Observation

What it does not mean

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

Key facts

  • Catheterization device Guiding catheter size
  • Guiding catheter size
  • Cath; Cath device; Circumference; Guid cath size; Point in time; QNT; Quan; Quant; Quantitative; Random

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

Catheterization device Guiding catheter sizeCath device Guid cath sizeGuiding catheter sizeDEVICESCircPtCatheterization device

Frequently asked questions

Code details

Code78945-3
SystemLOINC
Display nameCatheterization device Guiding catheter size
DescriptionGuiding catheter size
Short nameCath device Guid cath size
ComponentGuiding catheter size
PropertyCirc
TimingPt
System (specimen)Catheterization device
ScaleQn
ClassDEVICES
Example unitsFrench
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.54
Last changed2.54

Part names

Guiding catheter sizeCircPtCatheterization deviceQnCircumferencePoint in time (spot)

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

LOINC Code 78945-3 | HealthAssure