What are the sample types for blood gas analysis by EEG machine? How to choose sampling points?

Blood gas analysis is a clinically more examination, often used to determine whether the body has an acid-base balance disorder and the degree of hypoxia and hypoxia. Especially for critically ill patients, the results are particularly important. Do you know the sample types and sampling points for blood gas analysis? Friends who don’t know, let’s take a look together next.

Blood gas analysis EEG machine

What are the sample types for blood gas analysis?

The sample types for blood gas analysis include arterial blood samples, venous blood samples, and capillary blood samples.

Arterial blood samples. Arterial blood is the more commonly used blood type in blood gas analysis. Because it can provide better information on oxygen absorption and transportation, the information obtained is stable and does not vary depending on the sampling point.

For venous blood samples, it is generally not recommended to use venous blood for blood gas analysis, because it is affected by peripheral circulation and cell metabolism, and cannot be used to assess oxygen status, but it can reflect acid-base status (pH, pCO2, cHCO3) ctHb, FCOHb, FmetHb, FHbF, ctBil. EEG machine

Capillary blood samples can be analyzed by capillary blood when arterial blood is not allowed due to circumstances. The results of sO2, pO2, FOHb, and FHHb are for reference only and can better reflect the following parameters: ctHb, FCOHb, FMetHb, FHbF, ctBil

How to select sampling points for blood gas analysis?

Arterial blood sample: The arterial blood sample is commonly used. Because it is very superficial and easy to touch, there are no large veins nearby, and it has very good ulnar artery collateral circulation. It is easy to sample. If the periosteum is not touched during the puncture process, the pain is generally not sensitive. The modified Allen’s test is performed before the radial artery sampling to determine whether the collateral circulation is sufficient. The brachial artery can be used but is not commonly used, because it is not suitable for sampling due to its location, and the risk of damage to the surrounding environment is high. Although the femoral artery has a large area and is easy to puncture, it has poor collateral circulation and is easy to accidentally injure the femoral vein. It should be avoided in newborns and elderly patients.

Venous blood sample: The brachial vein is convenient for sampling. EEG machine

Capillary blood sample: blood is collected from earlobe, fingertip, thumb and heel. When using heel and thumb, the patient should be older than six months.