This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Which of the following changes in the lungs occurs under the influence of general anesthesia? I. ... (Read 31 times)

lracut11

  • Hero Member
  • *****
  • Posts: 536
on: Jul 16, 2018
Which of the following changes in the lungs occurs under the influence of general anesthesia? I. decreased chest wall elastance II. increased pleural pressure III. decreased muscle tone IV. decreased chest wall compliance
 
  A. I only
  B. II, III only
  C. I, II, III only
  D. II, III, IV only

Question 2

At which of the following points along the ventilatory cycle is alveolar pressure equal to atmospheric pressure; therefore, transpulmonary pressure equals pleural pressure? I. during inspiration II. at end-inspiration III. during expiration IV. at FRC
 
  A. I only
  B. II only
  C. I, III only
  D. II, IV only


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

meganmoser117

  • Sr. Member
  • ****
  • Posts: 303
Reply #1 on: Jul 16, 2018
Answer to Question 1

ANS: B
A. Incorrect response: See explanation B.
B. Correct response: The effect of general anesthesia or mechanical ventilation on regional pleural pressure in humans is not well described, though it is known that muscle tone decreases during anesthesia, increasing chest wall elastance and thus increasing pleural pressure. This effect helps explain the diminished FRC and eventual development of atelectasis in the dependent regions of normal subjects undergoing prolonged mechanical ventilation for elective surgery.
C. Incorrect response: See explanation B.
D. Incorrect response: See explanation B.

Answer to Question 2

ANS: D
A. Incorrect response: See explanation D.
B. Incorrect response: See explanation D.
C. Incorrect response: See explanation D.
D. Correct response: Regional lung inflation depends on the local transpulmonary pressure, which is the difference between the pressure in the alveoli and pressure at the pleural surface. That is,
Ptranspulmonary = Ppleural Palveolar
At FRC and at end-inspiration, alveolar pressure equals atmospheric pressure. Therefore transpulmonary pressure equals pleural pressure.


lracut11

  • Member
  • Posts: 536
Reply 2 on: Jul 16, 2018
YES! Correct, THANKS for helping me on my review

AmberC1996

  • Member
  • Posts: 317
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.

Did you know?

When taking monoamine oxidase inhibitors, people should avoid a variety of foods, which include alcoholic beverages, bean curd, broad (fava) bean pods, cheese, fish, ginseng, protein extracts, meat, sauerkraut, shrimp paste, soups, and yeast.

Did you know?

Though the United States has largely rejected the metric system, it is used for currency, as in 100 pennies = 1 dollar. Previously, the British currency system was used, with measurements such as 12 pence to the shilling, and 20 shillings to the pound.

Did you know?

Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.

Did you know?

Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.

Smoker's Lungs Smoker's Lungs
Body Part, Method of Examination, and Equipment Used During the General Physical Examination Cont. Body Part, Method of Examination, and Equipment Used During the General Physical Examination Cont.
Techniques for applying local anesthesia: (a) topical; (b) nerve block; (c) infiltration; (d) ... Techniques for applying local anesthesia: (a) topical; (b) nerve block; (c) infiltration; (d) ...
Three factors that influence the distribution of Na+ and K+ ions across the neural membrane. Three factors that influence the distribution of Na+ and K+ ions across the neural membrane.
Imperial Influence Imperial Influence
Climate change occurs over millions of years Climate change occurs over millions of years
Video: Electrical Conduction System of the Heart

For a complete list of videos, visit our video library