Frontiers 2016: Detection of Pulpal Blood Flow In Vivo with Pulse Oximetry in Dogs Flashcards
Authors?
Jessica Riehl
C. Snyder, J. Soukup and al.
Aim of study?
To investigate the ability of pulse oximetry to detect blood flow within the canine tooth of dogs
In what consisted the study?
- Population: 40 canine teeth of 37 anesthetized owner-dogs (1.5 - 11.5 ans)
- Measure pulse rate and SpO2 in vital canine teeth (finger probe (labial→lingual/palatal), gingiva (forehead probe) and tongue (clip probe) using pulse oximetry, and compare values.
What were the main differences between SpO2 reading from teeth compare to control area (tongue)
SpO2 from teeth
- Lower (teeth:86%; control areal: 97%)
- lower frequency of detection (reading)
- longer acquisition time
- more variable in readings within and between individuals
No correlation found between SpO2 level of control areal and teeth.
How pulse oxymetry measure pulse rate and SpO2?
- works on the basic principles of light passing from a photoelectric diode across the tissue to which the device is being applied and reaching a receptor.
- differential between light emitted from the diode and light received by the receptor is processed and provides both pulse rate (PR) and oxygen hemoglobin saturation (SpO2) values
N.B.: Sensor should conform to contours of tissue (teeth), and emittor and receptor of probe must be mainained as aparallel as possible to one another.
Was the ability to detect SpO2 correlated with age of patient?
Were values of SpO2 different between group age?
- No
- SpO2: adult dogs < juvenil dogs (make sense) but adult dogs < mature dogs (very questionnable)
- If dentin thickness decreases the likelihood of light penetrations, we would expect detection ability and quantitative values to decrease with age
According to this study, is pulse oximetry clinicaly a useful tool to detect non-vital teeth?
- Only if future studies observe non-vital teeth to have consistently lower SpO2 values that are signigicantly different than the values for vital teeth.
