Calculated arterial blood gas values from a venous sample and pulse oximetry: Clinical validation.

ABSTRACT:

Background

Arterial blood gases (ABG) are essential for assessment of patients with severe illness, but sampling is difficult in some settings and more painful than for peripheral venous blood gas (VBG). Venous to Arterial Conversion (v-TAC; OBIMedical ApS, Denmark) is a method to calculate ABG values from a VBG and pulse oximetry (SpO2). The aim was to validate v-TAC against ABG for measuring pH, carbon dioxide (pCO2) and oxygenation (pO2).

Methods

Of 103 sample sets, 87 paired ABGs and VBGs with SpO2 from 46 inpatients eligible for ABG met strict sampling criteria. Agreement was evaluated using mean difference with 95% limits of agreement (LoA) and Bland-Altman plots.

Results

v-TAC had very high agreement with ABG for pH (mean diff(ABG-v-TAC) -0.001; 95% LoA -0.017

SUBMITTER: Ekstrom M 

PROVIDER: S-EPMC6461265 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature