I&M I: Lecture 4 - Noninvasive BPM Flashcards
(26 cards)
What does ASA require for BP monitoring?
BP monitoring a minimum of every 5 minutes
What are the two types of blood pressure monitoring?
- Noninvasive
- Invasive
What is the gold standard for BP measurement?
Sphygmomanometer + stethoscope
What method is used for manual BP monitoring?
Auscultatory Method
What should be listened to during manual BP monitoring?
Korotkoff sounds
What formula is used to calculate Mean Arterial Pressure (MAP)?
MAP = DP + (SP - DP) / 3
What happens during the first cycle of oscillometry monitors?
Monitor tries detecting oscillations at preset pressure, inflating more if oscillations detected
What is the maximum adult pressure for NIBP monitoring?
300 mmHg
What is the maximum neonate pressure for NIBP monitoring?
150 mmHg
What does NIBP monitors use to determine pressures?
- Measurements
- Extrapolations
- Algorithms
What are the components of NIBP equipment?
- Power Source
- Cuff
- Pressure Tubing
- Inflation/Deflation Mechanism
- Sensing Mechanism
- Timing Circuitry
- Control Circuitry
- Alarms
What are the two types of power sources for NIBP equipment?
- Line
- Battery
What is the purpose of the bleed valve in NIBP equipment?
Deflation
What is the ideal width of a BP cuff relative to arm circumference?
40-50% of circumference of limb
What happens if the cuff is too small?
Overestimate BP
What is the impact of arm position on BP readings?
Every 10 cm change above/below heart level = 7.5 mmHg difference in BP
What are some common NIBP complications?
- Tissue Damage
- Neuropathies
- Compartment Syndrome
- Mechanical Problems
- Artifacts
- Air Embolism
What are the advantages of NIBP monitoring?
- Automatic, regular intervals
- Noninvasive
- Cheaper
- User-friendly
- Fewer risks than invasive monitors
What are some disadvantages of NIBP monitoring?
- Undesirable in rapid BP swings
- Patient discomfort
- Prolonged inflation
What is Continuous Noninvasive BP Monitoring?
Vasotrac measures pressure via a sensor applied directly above artery
What is the function of the T-Line Tensymeter?
Continuous monitor that correlates closely to invasive BP monitoring
How does FINAP measure BP?
Beat to beat BP measurement using finger cuff and infrared light pulses
What is the risk associated with air embolism in NIBP?
Cuff tubing connected to IV line could allow air entry
Fill in the blank: The cuff must encircle _______ of the circumference for accurate readings.
> 50%
