Does low hemoglobin affect pulse oximetry?

Despite her poor clinical condition and profound anemia (Hb, 2.7 g/dL), pulse oximetry continued to demonstrate a high O2 saturation percentage. Manipulation of Beer’s law shows that anemia theoretically should not affect pulse oximetry values.

Does hemoglobin affect oxygen saturation?

The blood hemoglobin concentration is determinant of oxygen delivery. In anemic patients, oxygen delivery decreases and oxygen extraction is increased. This leads to decreased venous hemoglobin saturation and a lower tissue oxygen saturation.

What factors affect hemoglobin saturation?

There are several important factors that affect the affinity of hemoglobin to oxygen as therefore affect the oxygen-hemoglobin dissociation curve. These factors include the (1) pH (2) temperature (3) carbon dioxide (4) 2,3-BPG and (5) carbon monoxide.

What factors affect oxygen saturation?

Be aware that multiple factors can affect the accuracy of a pulse oximeter reading, such as poor circulation, skin pigmentation, skin thickness, skin temperature, current tobacco use, and use of fingernail polish.

What are the four factors that affect binding of oxygen with hemoglobin?

Several factors influence the binding of oxygen to hemoglobin: temperature, pH, PCO2 and 2,3 diphosphoglycerate (2,3 DPG). Increasing the temperature of Hb lowers its affinity for O2 and shifts the oxygen dissociation curve to the right, as shown in Figure 3.

How do you increase o2 saturation?

You can increase the amount of oxygen in your blood naturally. Some ways include: Open windows or get outside to breathe fresh air. Something as simple as opening your windows or going for a short walk increases the amount of oxygen that your body brings in, which increases overall blood oxygen level.

What causes low spo2 readings?

Impairment in gas exchange or ventilation/perfusion mismatches are the most common causes of low SpO 2 in daily routine in pulmonary medicine. Potential sources of error in pulse oximetry are poor peripheral perfusion, skin pigmentation, nail polish, motion artefacts and in- terfering ambient light.