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size="5" For what is used pulseoxymetry? < / strong>
other names
oxygen saturation,
Monitoring oxygenation.
definition
The pulse oximetry or pulseoxymetry is measured, non-invasive, oxygen carried by the hemoglobin inside the blood vessels.
Como funciona
The color of blood varies depending on what saturated with oxygen which is due to the optical properties of the heme group of hemoglobin molecule. When the hemoglobin molecule releases oxygen loses its pink color, becoming a tone more bluish leaves and spend less red light.
Thus the oximeter determined by measuring oxygen saturation espectrofotométricamente the "degree" of blue blood and blood expresses this "azulez" in terms of saturation. As the light absorption of tissues and blood vein are constant, any change in light absorption between a given time and one post should be exclusively to the arterial blood. The oximeter measured as the ratio, at an interval of time, differences between the absorption of red light and infrared. This relationship is linked directly with the saturation of oxy-hemoglobin.
techniques used to conduct
It requires an apparatus pulseoxymetry, with a sensor in the form of clip. In the clip is a producer of light that is reflected in the pile of pulpejo finger, this sensor measures the amount of light absorbed by the oxy-hemoglobin circulating in the patient.
It should pulpejo massage the patient's finger, then puts the clip with the sensor and is expected to receive information on a screen of the device on which appear the following information:
indicators of oxygen saturation
Heart rate
Curve pulse
Limites de la pulseoxymetry
Alter of haemoglobin (MetHb or COHP).
dyes and pigments in the area of reading (painted nails).
external light sources.
peripheral hypoperfusion.
anemia.
Increased venous pulse.
Do not detected hiperóxia.
Do not detected hypoventilation.
indicators
In general are useful in patient care which should include an alteration in the oxigenacióno for valuing certain therapeutic:
Respiratory Distress in asthma.
cyanosis.
Poll exercise tolerance.
Evaluation control oxygen therapy.
Etc. ...
use
1. Firstly be obtained information on the proper use of each model, and if necessary adapt needs to know that we have the correct model, because the market there are many models using a wide range of job opportunities through various programmes.
2. Remove paintings nail in the case of using sensors thimble.
3. explain to the patient that is the measurement, stressing the need to move the minimum and not move a finger sensor.
4. Perform measurement away from a light source importantly, pockets, etc..
5. If carried out continuous measurements for a long time to change, at least every 8 hours, location, to avoid skin lesions.
6. sensors clip should not compress too much, since it could alter the measurement.
normal results
The oxygen saturation should be greater than 95%.
Valores de abnormal results
Values increased oxygen saturation:
hyperventilation
Anxiety
Values of diminished oxygen saturation:
chronic lung diseases.
decompensation or asthma attacks.
Heart disease.
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