oximeter


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oximeter

 [ok-sim´ĕ-ter]
a photoelectric device that measures oxygen saturation of the blood by recording the amount of light transmitted or reflected by deoxygenated versus oxygenated hemoglobin.
finger oximeter a pulse oximeter whose sensor is attached to a finger, so that the oxygenation of blood flowing through the finger can be determined. See illustration.
Finger oximeter. Pulse oximetry transducer properly placed on a finger. Fold the Oxisensor over the end of the digit. Align the other end of the sensor so that the two alignment marks are directly opposite each other. Press the sensor into the skin. Wrap the adhesive flaps around the digit. Courtesy of Nellcor Puritan Bennett Corp., Pleasanton, CA.
pulse oximeter an oximeter that permits measurement of oxygen saturation in an artery by recording the different modulations of a transmitted beam of light by reduced hemoglobin and oxyhemoglobin as seen during the pulse. A component of the oximeter analyzes the variations in light absorption and provides a readout of the per cent of saturation of the hemoglobin. A saturation above 90 per cent corresponds to a PaO2 of 60 torr or higher. The presence of fetal hemoglobin, carboxyhemoglobin, or intravascular dyes may alter the accuracy of a pulse oximeter. In these instances a SaO2 of 90 per cent may not be associated with a PaO2 of greater than 60 torr.

ox·im·e·ter

(ok-sim'ĕ-tĕr),
An instrument for determining photoelectrically the oxygen saturation of a sample of blood.

oximeter

(ŏk-sĭm′ĭ-tər)
n.
A device for measuring the oxygen saturation of arterial blood, especially a pulse oximeter.

ox′i·met′ric (-mĕt′rĭk) adj.
ox′i·met′ri·cal·ly adv.
ox·im′e·try n.

ox·im·e·ter

(ok-sim'ĕ-tĕr)
A laboratory instrument capable of measuring the concentration of oxyhemoglobin, reduced hemoglobin, carboxyhemoglobin, and methemoglobin in a sample of blood.
Synonym(s): cooximeter, hemoximeter.

oximeter

A device for measuring or monitoring the oxygenated fraction of the haemoglobin in the circulating blood. Oximeters use photoelectric methods to detect colour differences in blood of different oxygen saturation. They are valuable aids to safety and are widely used in operating theatres and in intensive care units. See also PULSE OXIMETER.
References in periodicals archive ?
How well do inexpensive, portable pulse oximeter values agree with arterial oxygenation saturation in acutely ill patients?
Based on this, we measured the PPG signals from the finger to investigate the effect of optical crosstalk on the pulse oximeter according to skin color.
The purpose of this study was to determine the level of agreement between a portable pulse oximeter and Sa[O.sub.2] values, and assess its acceptability as a clinical device for estimating Sa[O.sub.2] based on expert recommendations (bias [less than or equal to]2%; precision [less than or equal to]5%) (Huffman, 1989; Jensen et al., 1998; Nitzan et al., 2014; Soubani, 2001).
(1) Shah N, Ragaswamy HB, Govindugari K, Estanol L "Performance of Three New-Generation Pulse Oximeters during Motion and Low Perfusion in Volunteers".J Clin Anesth.
CONCLUSION: Pulse oximeter can be used to detect the hypoxia in the admitted patients at an early stage.
Clinical studies of the validity of pulse oximeter alarms yielded disturbing data.
All my comments in the article refer to saturation as measured by a pulse oximeter.
Because the oximeter made sampling so easy, few questioned the accuracy of its results.
In developing the TruSat pulse oximeter, GE Healthcare engineers explored a new prototyping process for creating the oximeter's outside bumpers--plastic parts that protect the oximeter, hold it in place during use, and help provide easy plug-in access.
The authors comprehend that S[O.sub.2], is not method-dependent, that a pulse oximeter faithfully measures S[O.sub.2] in the presence of COHb, and that the underestimation of S[O.sub.2] by MetHb is attributable to its color, which interferes with the measurement.
This technology enables the N-595 Pulse Oximeter to read through those conditions most challenging to pulse oximetry: motion combined with low perfusion.
-- A fetal pulse oximeter that measures fetal oxygen saturation during labor was recommended for approval "with conditions" by a Food and Drug Administration advisory panel.