Which does the nurse use to select the proper site and equipment for a pulse oximeter sensor?
1. Earlobe for a client with parkinsonism
2. Clip-on probe for a client who has obesity
3. Disposable probe for client with latex allergy
4. Finger for client in postanesthesia recovery unit
1
1. The client who has parkinsonism is likely to have tremors, so the nurse places the pulse oximeter on the client's earlobe to minimize distorting the measurement from tremors. Tremors, characteristic of parkinsonism, are worse at distal sites such as the feet and hands because they are distal to the torso and are more easily moved because of lighter weight and less support from adjacent structures.
2. A clip-on probe on a client with obesity potentially results in distorted oxygen sa-turations because increased body mass increases the distance the photosensor needs to penetrate for accurate readings. A clip-on sensor can potentially contribute to skin breakdown, as well, if the sensor causes a pressure point.
3. A disposable probe for a client with latex allergy is unsuitable because it contains latex.
4. A finger is a poor choice for SaO2 monitoring in the postanesthesia care unit be-cause clients frequently arrive hypothermic and vasoconstricted from surgery, poten-tially leading to false low readings.
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