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www.healthline.com/health/co2-blood-test

Blood samples for a CO2 blood test may be taken from either a vein or an artery. Venipuncture blood sample. Venipuncture is the term used to describe a basic blood sample taken from a vein.

www.ncbi.nlm.nih.gov/pmc/articles/PMC4733455

The mixed venous-to-arterial carbon dioxide (CO 2) tension difference [P (v-a) CO 2] is the difference between carbon dioxide tension (PCO 2) in mixed venous blood (sampled from a pulmonary artery catheter) and the PCO 2 in arterial blood. P (v-a) CO 2 depends on the cardiac output and the global CO 2 production, and on the complex relationship between PCO 2 and CO 2 content.

www.uptodate.com/contents/venous-blood-gases-and-other-alternatives-to...

An arterial blood gas (ABG) is the traditional method of estimating the systemic carbon dioxide tension and pH, usually for the purpose of assessing ventilation and/or acid-base status. However, the necessary sample of arterial blood can be difficult to obtain due to diminished pulses or patient movement.

www.healthtap.com/topics/venous-vs-arterial-co2

Doctors give unbiased, helpful information on indications, contra-indications, benefits, and complications: Dr. Karamanoukian on venous vs arterial co2: in the cord I forget which one has the oxygen, but that has the good air and not the bad air. I'm pretty sure it works reasonably with arterial going IN with oxygen and nutrients and coming back out with wastes and CO2.

www.oxfordmedicaleducation.com/abgs/venous-blood-gas-vbg-interpretation

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.

en.wikipedia.org/wiki/Carbon_dioxide_tension

Carbon dioxide tension. Carbon dioxide is a by-product of food metabolism and in high amounts has toxic effects including: dyspnea, acidosis and altered consciousness. Arterial blood carbon dioxide tension. P a CO 2 – Partial pressure of carbon dioxide at sea level (765 mmHg) in arterial blood is between 35 mmHg and 45 mmHg.

www.webmd.com/a-to-z-guides/bicarbonate

Bicarbonate is a form of carbon dioxide (CO2), a gas waste left when your body burns food for energy. Bicarbonate belongs to a group of electrolytes, which help keep your body hydrated and make ...

www.clinlabnavigator.com/carbon-dioxide-co2-content.html

Carbon dioxide or CO2 is a blood gas and measured as part of an arterial blood gas. ... Total carbon dioxide blood content is the sum of these four components. Arterial blood gas analysis includes three parameters related to the carbon dioxide content of blood.

litfl.com/vbg-versus-abg

Reviewed and revised 7 January 2016 OVERVIEW 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 […]

www.verywellhealth.com/partial-pressure-of-carbon-dioxide-pac02-914919

If you have COPD, your doctor may want to know what your partial pressure of carbon dioxide (PaCO2) level is.PaCO2 is one of several tests used to measure arterial blood gasses in people with lung disease and other illnesses. It evaluates how well carbon dioxide (CO2) moves from the lungs into the blood.