Exam 4: Lecture 4.2 - Ventilator Monitoring

Question 1

what does tachypnea indicate in the OR?

Answer 1

pain, distress, lack of anesthesia
titrate or administer medications

Question 1

how was animal life defined in the early 1900s?

Answer 1

absence of breathing

Question 2

what can EKG electrodes hide and make you think the patient is actually breathing?

Answer 2

obstruction
these only show chest wall movement, not actual ventilation

Question 3

direct monitoring of ventilation can be done by what?

Answer 3

airflow sensors, pinwheels, gas sampling, thermocouples, EtCO2 (best)

Question 4

indirect monitoring of ventilation?

Answer 4

imputing air flow from changes in thoracic dimension or breath sounds, impedance measurements, EKG electrodes

Question 5

what does thoracic impedance and inductance actually measure?

Answer 5

changes in the shape of the thoracic cage
not actual air entry
can fool you in the presence of upper airway obstruction

Question 6

what does thoracic impedance accurately measure?

Answer 6

RR and tidal volumes

Question 7

how is thoracic impedance measuring?

Answer 7

it is resistance to flow of alternating current
uses electrodes placed far apart

Question 8

how does inductive plethsmogrophy work?

Answer 8

uses DC sensors in the form of coils or wires around the chest or abdomen