Optional, AEMT. Objectives Describe importance of oxygen to body metabolism Understand oximetry...
-
Upload
elfrieda-hill -
Category
Documents
-
view
219 -
download
1
Transcript of Optional, AEMT. Objectives Describe importance of oxygen to body metabolism Understand oximetry...
Optional, AEMT
Objectives Describe importance of oxygen to body metabolism Understand oximetry assesses oxygen saturation of
hemoglobin Understand oximetry can show effectiveness of
interventions Know oximetry is a routine vital sign Know procedures of application and reading
oximetry Determine sights for application of oximetry Define possible complications with oximetry Describe possible troubleshooting Describe transport of oxygen in body Understanding that hemoglobin reflects light
differently with and without oxygen
OxygenEssential for human functionNecessary for proper cellular metabolism
Without oxygen, lactic acid builds from anaerobic metabolism
Oxygen transportAbout 2% of oxygen gets dissolved in plasmaOxygen is bound to hemoglobin in blood(98%)
Hemoglobin changes shape and color with oxygen Each hemoglobin can carry four oxygen molecules
Pulse OximetryMeasures oxygen saturation of hemoglobin
Infrared and Red light emitted into tissue Sensor then reads amount returned to photo detector
Hemoglobin reflects light differently when oxygenated vs. not oxygenated
Saturation is measured with each pulse as blood passes
Purpose of Pulse OximetryMeasure oxygenation of bloodAssess the effectiveness of oxygen
administrationAssess effectiveness of any other airway or
breathing interventions
Indications for Pulse OximetryShould be routine vital sign
So have a reading with every set of vitals
Continued monitoring should occur in anyone having respiratory compromiseSuch as those with: COPD,
emphysema, pulmonary edema, airway obstruction, etc.
Application of Pulse OximetryConsult directions from manufacture for
specific application guidelinesGeneral application:
Turn on unit Select proper sensorPlace proper sensor on an area of thin tissue
Fingers, toes, ear lobes, bridge of noseAllow a few seconds for monitor to read
saturation and pulse
Readings of Pulse OximetryReadings are measured in SpO2
ex. SpO2 is 98%
Average reading is 95-99%Acceptable range is 93-100%
Oximetry will also give a pulse reading
Finger Tip
Hand Held“Table Top”
This page does not endorse any company, all pictures are intended for educational purposes only
•Finger tip and hand held are most common on ambulance
•Pulse oximeters are made by many companies
Sensors for Pulse Oximeters
Many different sensors for pulse oximeters
•Standard finger sensors
•Wrap around sticker sensors
•Wrap around silicone sensors
Complications With OximetryHypoperfusion
Not enough blood in capillary bed to obtain accurate reading
Site is too coldPatient movement can alter effectivenessNail polishCarbon monoxide poisoning
Hemoglobin gets saturated with compounds other than oxygen
Troubleshooting OximetrySee specific directions from manufactures
for your device. Here are some generals:Will not turn on: check batteriesNot obtaining a reading:
Make sure sensor cable is connected to monitorMake sure sensor is on warm and thin tissueCheck for nail polish, grease, etc.Could be a low batteryBlood flow too low (make sure you’re not
causing it: BP cuffs, IV tourniquet)Constant alarms:
Alarm limits may be to high or low
SummaryOxygen is essential to body for metabolism
(prevents lactic acid)Oximetry assesses oxygen saturation of
hemoglobin, not sum of oxygen in bloodOximetry can be used to know if interventions
are effectiveOximetry is a vital signOximetry is applied using correct sensor Normal reading are SpO2 between 95-99%
Summary cont.Oximetry is placed over thin tissueOximetry can have many complications
Polish, cold, hypoperfusion, movement . . .Troubleshoot if monitor not working, or if
reading doesn’t seem rightOxygen is transported by hemoglobinHemoglobin changes shape and color causing
light to reflect differently