« previous next »

Author Question: Which level of FiO2 and what time of exposure has been associated with oxygen toxicity? 1. FiO2 of ... (Read 148 times)

charchew

  • Hero Member
  • *****
  • Posts: 579
on: Jul 16, 2018
Which level of FiO2 and what time of exposure has been associated with oxygen toxicity? 1. FiO2 of 0.5 2. FiO2 of 0.7 3. FiO2 of 0.6 4. 24 to 48 hr
 
  a. 1 and 2 only
  b. 3 and 4 only
  c. 2 and 3 only
  d. 1 and 4 only

Question 2

The increased work of breathing associated with auto-positive end expiratory pressure (PEEP) during mechanical ventilation is due to:
 
  1. Hyperinflation or impaired contractility of the diaphragm.
  2. Large alveolar pressure drops required to trigger breaths.
  3. Increased volume of the intrathoracic airways.
  a. 1 and 2 only
  b. 1 and 3 only
  c. 2 and 3 only
  d. 1, 2, and 3


GCabra

  • Sr. Member
  • ****
  • Posts: 331
Reply #1 on: Jul 16, 2018
Answer to Question 1

ANS: B
An FiO2 of 0.5 or more for longer than 24 to 48 hr is associated with the development of oxygen toxicity.

Answer to Question 2

ANS: A
First, hyperinflation caused by auto-PEEP stretches the lung, and the stretching impairs the con-tractile action of the diaphragm. Second, in pressure- or flow-triggered breaths, the high alveolar pressure caused by auto-PEEP must be overcome before any airway pressure change can occur.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.

Did you know?

Studies show that systolic blood pressure can be significantly lowered by taking statins. In fact, the higher the patient's baseline blood pressure, the greater the effect of statins on his or her blood pressure.

Did you know?

Children with strabismus (crossed eyes) can be treated. They are not able to outgrow this condition on their own, but with help, it can be more easily corrected at a younger age. It is important for infants to have eye examinations as early as possible in their development and then another at age 2 years.

Did you know?

Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.

Did you know?

In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

Substrate–level phosphorylation. Substrate–level phosphorylation.
This photograph of a Union soldier just freed from Andersonville prison, stunned and enraged norther This photograph of a Union soldier just freed from Andersonville prison, stunned and enraged norther
Time Time
Testing an oxygen sensor using a DMM set on DC volts. With the engine operating in closed loop, ... Testing an oxygen sensor using a DMM set on DC volts. With the engine operating in closed loop, ...
Over time, cells acquire mutations. Two independently acquired mutations in the same cell may be suf Over time, cells acquire mutations. Two independently acquired mutations in the same cell may be suf
In 1974 a UC Berkeley group fired an oxygen nucleus at a californium target. Giv In 1974 a UC Berkeley group fired an oxygen nucleus at a californium target. Giv
Video: Digestion Animation

For a complete list of videos, visit our video library