At which point in the pressure-time curve of a spontaneous breath should the transdiaphragmatic pressure be greatest?
a. Mid-inspiration
b. Mid-expiration
c. End of exhalation
d. Beginning of inspiration
ANS: A
The transdiaphragmatic pressure is the difference between the gastric and esophageal pressures, as measured during the respiratory cycle. The greatest distance between these two pressures dur-ing the respiratory cycle is at the middle of inspiration, when the esophageal pressure is at its lowest point. At mid-expiration the gastric and esophageal pressure difference is at its smallest point. See Figure 10-25.
You might also like to view...
Hearing, interpreting, evaluating, and responding are the four primary traits of:
A) Effective verbal communication. B) Conflict resolution. C) Active listening. D) Overcoming literacy barriers.
Which of the following is NOT part of the musculoskeletal system?
a. joints c. bones b. blood vessels d. skin
_______ a physician's examination of the patient's natural method, form, and process of standing or sitting still; provides indicators about neuromuscular function, balance, and other indicators
Fill in the blank with correct word.
Once contraction has occurred, skeletal muscles release an enzyme called ________, which breaks down acetylcholine and allows the muscle to relax.
Fill in the blank(s) with the appropriate word(s).