Pulse oximetry, or SpO2, is a non-invasive method for continuously monitoring arterial oxygen saturation (SaO2). This procedure involves attaching a probe or sensor to the patient's fingertip, forehead, earlobe, or nose bridge. The sensor works by detecting changes in oxygen saturation levels through light signals generated by the oximeter and reflected by the pulsing blood under the probe.
Purpose
Average SpO2 values are greater than 95%. If the readings fall below 90%, it indicates that tissues are not receiving enough oxygen, necessitating further evaluation. Pulse oximetry is particularly valuable in perioperative and critical care situations where anesthesia, sedation, or decreased consciousness may mask signs of hypoxia. It allows nurses to detect changes in SpO2 swiftly and administer appropriate treatment.
Procedure
To ensure accurate readings, the nurse should verify the correct placement of the probe and minimize or eliminate excess motion, such as shivering or movement of the extremity. It's noteworthy that pulse oximetry readings become less accurate when the SpO2 falls below 70%.
Nursing Responsibilities
Nurses should be aware of factors that can alter the accuracy of pulse oximetry, including motion, anemia, cold extremities, bright fluorescent lights, intravascular dyes, acrylic nails, and dark skin color. In cases where the accuracy of SpO2 reading is doubtful, an arterial blood gas (ABG) analysis should be obtained to verify the values.
Pulse oximetry is a non-invasive method for continuously monitoring the oxygen saturation or SpO2.
Average SpO2 values are above 95%. Readings below 90% indicate that tissues are not receiving enough oxygen, necessitating further evaluation.
Pulse oximetry is helpful in perioperative and critical care settings when anesthesia, sedation, or decreased consciousness can hide signs of hypoxia. It helps healthcare providers quickly detect changes in SpO2 and provide appropriate treatment.
This procedure involves attaching a probe or sensor to the patient's fingertip, forehead, earlobe, or nose bridge.
The sensor detects oxygen saturation levels using light signals generated by the oximeter, which are absorbed and reflected by the pulsing blood beneath the probe.
Elements that affect pulse oximetry accuracy include motion, anemia, cold extremities, bright fluorescent lights, intravascular dyes, acrylic nails, and dark skin color.
If the accuracy of the SpO2 reading is uncertain, an arterial blood gas analysis should be obtained to verify the values.
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