2022年10月17日 · On the VBG, a pCO2 of about 40 (40- 50) is considered normal, though people who have COPD might have a much higher baseline pCO2. Lower than normal CO2 likely indicates that a patient’s breathing is fast and that they are blowing off CO2.

Venous blood gases (VBG) are widely used in the emergency setting in preference to arterial blood gases (ABG) as a result of research published since 2001; The weight of data suggests that venous pH has sufficient agreement with arterial pH for it to be an acceptable alternative in clinical practice for most patients

2023年7月5日 · This guide describes the venous blood gas (VBG) test, explains key differences from an arterial blood gas (ABG), and provides an approach to VBG result interpretation. Understanding how a VGB differs from an ABG is important. For more information on ABGs, see our guides to performing an ABG and interpreting an ABG.

2018年10月15日 · Venous Blood gases (VBG’s) – blood sample taken from either peripheral or central veins –can serve as an alternative to an ABG when evaluating patients with metabolic and respiratory disturbances. Historically, values obtained via VBG have been criticized for a perceived lack of accuracy in all domains.

2019年3月4日 · A peripheral venous blood gas (VBG) can be obtained as the nurse obtains IV access upon patient arrival, requiring no additional sticks or risk of arterial injury. This review will break down blood gas results into individual components to compare venous versus arterial results and evaluate whether these are clinically important differences.

2023年4月27日 · VBG cannot be used to assess oxygenation, but it's generally adequate to assess pH and ventilation (pCO2 and pH). The difference between ABG and VBG values is proportional to the difference in the oxygen saturation between arterial and venous blood:

2025年1月17日 · In the intensive care unit, emergency department, and respiratory floors, many clinicians use venous blood gases (VBGs) instead of ABGs to estimate indices of ventilation and acid-base disturbance (ie, systemic carbon dioxide [CO 2] and pH).

A VBG is obtained by placing a venous sample in the arterial blood gas analyser. VBGs are popular as it is far less painful for the patient to obtain a venous sample compared to an arterial sample. In addition, obtaining ABGs carries well known risks.

Laboratory orders and clinical documentation should clearly identify the origin of a venous sample for blood gas analysis. For example, there should be clear documentation to differentiate whether a venous sample was drawn from a peripheral stab or an indwelling central venous catheter.

Venous blood gas (VBG) interpretation . Arterial blood gases (ABGs) are commonly used for estimating the acid-base status, oxygenation and carbon dioxide concentration of unwell patients. However, arterial blood can be difficult to obtain due to weak pulses or patient movement.