This topic contains a solution. Click here to go to the answer

Author Question: Why do vasodilators administered via the intravenous route cause an increase in intrapulmonary ... (Read 53 times)

karen

  • Hero Member
  • *****
  • Posts: 537
Why do vasodilators administered via the intravenous route cause an increase in intrapulmonary shunting and a decreased Pao2?
 
  A. because they come in contact with all the vessels of both systemic and pulmonary vasculatures
  B. because they often cause pooling of venous blood in the systemic venous circulation
  C. because they dilate vessels of both ventilated and unventilated alveoli in the pulmonary vasculature
  D. because they cause a decreased cardiac output as an untoward effect

Question 2

The therapist is about to administer a 70-30 heliox mixture to a patient who is to receive NPPV. Which of the following mechanical ventilators should the therapist select for this application?
 
  A. Hamilton Galileo
  B. Aptar
  C. Viasys Avea
  D. No noninvasive positive pressure ventilator can accommodate heliox.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

welcom1000

  • Sr. Member
  • ****
  • Posts: 298
Answer to Question 1

ANS: C
A. Incorrect response: See explanation C.
B. Incorrect response: See explanation C.
C. Correct response: In contrast to inhaled NO (iNO), intravenous vasodilators (e.g., sodium nitroprusside and nitroglycerin) are not selective vasodilators. Although intravenous vasodilators lower pulmonary artery pressure, they also lower systemic blood pressure. Moreover, these agents increase blood flow to both ventilated and unventilated alveoli, resulting in increased intrapulmonary shunting and a lower Pao2.
D. Incorrect response: See explanation C.

Answer to Question 2

ANS: B
A. Incorrect response: See explanation B.
B. Correct response: The Aptar heliox delivery system is available to deliver heliox with NPPV. It uses a premixed blend of heliox from a source gas cylinder and it delivers to a spontaneously breathing patient through a sealed face mask. The Aptar enables the therapist to adjust the level of pressure support (3 to 20 cm H2O), trigger sensitivity (0.1 to 1.5 cm H2O), rise time, and cycle sensitivity (5 to 75 of peak inspiratory flow). It incorporates a vibrating mesh nebulizer, but does not include an O2 blender or PEEP capabilities.
C. Incorrect response: See explanation B.
D. Incorrect response: See explanation B.




karen

  • Member
  • Posts: 537
Reply 2 on: Jul 16, 2018
:D TYSM


pratush dev

  • Member
  • Posts: 321
Reply 3 on: Yesterday
Excellent

 

Did you know?

Though newer “smart” infusion pumps are increasingly becoming more sophisticated, they cannot prevent all programming and administration errors. Health care professionals that use smart infusion pumps must still practice the rights of medication administration and have other professionals double-check all high-risk infusions.

Did you know?

Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.

Did you know?

Atropine was named after the Greek goddess Atropos, the oldest and ugliest of the three sisters known as the Fates, who controlled the destiny of men.

Did you know?

Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.

Did you know?

Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

For a complete list of videos, visit our video library