Which of the Following Are Necessary to Ensure a Valid

question 54

Multiple Choice

Which of the following are necessary to ensure a valid single-breath diffusing capacity of the lungs (DLCO) test result?
1) Two or more acceptable tests should be averaged.
2) Breath-hold time should be between 3 and 5 sec.
3) Corrections for hemoglobin (Hb) and COHb should be included.
4) The maneuvers should be reproducible to within 10%.

• A)1, 2, and 3 only
• B)2 and 4 only
• C)1, 3, and 4 only
• D)1, 2, 3, and 4

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Definitions:

Interosseous Portion

The portion of a limb or organ where two or more bones are joined by connective tissue, aiding in stability and movement.

Rectus Abdominis

A major abdominal muscle that extends along the front of the abdomen, helping in movements and maintaining posture.

Forced Expiration

The active process of exhaling air out of the lungs using the abdominal and other respiratory muscles, beyond normal passive breathing.

Unbiased Estimator

A statistical estimator that is expected to produce values close to the parameter it estimates without systematic error.