Equipment Operation & Patient Preperation A

Question 1

A higher sampling rate will result in ___

But it will also result in ___

Answer 1

Better, clearer representation but takes more memory.

Question 2

What is the minimum sampling rate?

What is the preferred sampling rate?

Answer 2

Minimum sampling rate is 200 hertz

But preferred is at least 500 hertz

Question 3

What should you do with recorded data in case it gets lost or deleted?

Answer 3

Back it up on a secondary hard drive or file server

Question 4

All the wires that attach to the patient’s head are connected to a device. This device is known by four names. What are they? (x4)

Answer 4

Headbox, jackbox, electrode board, or input board. (These are synonyms for the same thing.)

Question 5

To improve the pictures and readings, it is recommended that you reduce the ___. This is done by ___.

Answer 5

Reduce the resistance by cleaning and preparing the skin.

Question 6

What materials are most commonly used for electrodes?

Answer 6

Gold plated silver electrodes. Gold and silver are excellent conductors.

Question 7

What is a salt bridge?

Answer 7

A salt bridge is when two electrodes communicate with each other via sweat

Question 8

What solvent is used to remove electrodes?

Answer 8

Acetone

Question 9

What is a thermistor? How does it work?

Answer 9

It is a temperature sensitive resistor. The amount of electricity that goes through it depends on the temperature.

Question 10

How is the thermistor used? What is the effect that is associated with this detection?

Answer 10

It detects the rate of temperature change between expired air and room air. (The Seebeck Effect) (It’s used to measure airflow. A change in temperature can be used to measure air flow.)

Question 11

Name three things that can affect the accuracy of a pneumotachometer.

Answer 11

Warm room
Ceiling fan
Moisture collecting on the sensors

Question 12

What is a RIP? What is it used to detect?

Answer 12

A RIP is a Respiratory Inductive Plethysmograph. It is a belt used to detect chest and abdominal movement.

Question 13

How does a RIP work?

Answer 13

It measures the amount of stretch in the gold wires that are embedded in each belt.

Question 14

What is impedance plethysmography? When are they used?

Answer 14

Electrodes are placed on opposite sides of the body, usually the abdomen. Used for patients who are infants.

Question 15

What is a Piezo Belt?

Answer 15

Detects chest and abdominal movement but it’s not as accurate as a RIP (respiratory inductive plethysmograph) (Note: Piezo means “pressure”)

Question 16

What would happen if a patient were to lie on the piezo crystal when wearing a piezo belt?

Answer 16

The piezo belt would not give accurate information.

Question 17

How does intercostal EMG work? Why would it be used?

Answer 17

It measures the muscle movement of the intercostal muscles. It’s inexpensive.

Question 18

What device would we use to measure esophageal pressure? (x4)

Answer 18

Esophageal manometry, esophageal catheter, esophageal ballons, or water filled catheters.

Question 19

Why would we want to measure esophageal pressure?

Answer 19

It’s a very accurate reading of intrathoracic breathing effort.

Question 20

What does a cardio-pneumograph measure?

How is it powered?

Answer 20

It measures heart rate and respiration on one channel. It is battery powered. (Batteries can run dead!)

Question 21

___-___ ___ is the best conductor.

___ ___ ___ is one of the best conductors for recording bioelectric potentials.

Answer 21

Silver-Silver Chloride

Gold plated silver

Question 22

What does a thermocouple do?

How many wires does it use and where are they placed on the patient?

Answer 22

It measures the temperature difference between two dissimilar metals.
Uses 3 wires, one in front of the mouth and one in front of each nare.

Question 23

What is the indication for overnight pulse oximetry?

Answer 23

Identifies patients with sleep-related breathing disorders

Question 24

What is the preferred method for detecting RERAs?

Answer 24

Nasal Pressure Transducer