Calculate the time constant for lung emptying given the information below. • ? Pplateau: 35 cm H2O • ? Raw: 1.2 cm H2O/L/sec • ? Cl: 50 ml/cm H2O
A. 0.06 second
B. 0.384 second
C. 1.75 seconds
D. 6.0 seconds
ANS: A
A. Correct response: The ventilation time constant is the product of the airway resistance and the lung compliance, that is, (50 ml/cm H2O = 0.05 L/cm H2O)
Raw × Cl = time constant
(1.2 /sec) (0.05 ) = 0.06 second
The time constant represents the time required for either lung filling or lung emptying.
B. Incorrect response: See explanation A.
C. Incorrect response: See explanation A.
D. Incorrect response: See explanation A.?
You might also like to view...
Andrea is a 32-year-old female who had a TAH and BSO for severe endometriosis six weeks ago. When she returned to her gynecologist's office for her six week post-op check up, she told her physician that she was experiencing hot flashes, night sweats, and had difficulty sleeping. Her physician told her she was going through an artificially-induced menopause because of the surgery. He discussed
several different treatment options with her, including hormone replacement therapy. She told him she wanted to weigh her options and they both agreed she should schedule a follow-up appointment in one week to set up a treatment plan. Dx: Post-procedural menopause; status post TAH/BSO What will be an ideal response?
The potential hydrogen ion concentration (pH) of a solution indicates acidity and alkalinity.
Answer the following statement true (T) or false (F)