If RR increases, Total Cycle Time (TCT) will tend to which direction?

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Multiple Choice

If RR increases, Total Cycle Time (TCT) will tend to which direction?

Total cycle time is the duration of one complete breath, and it is inversely related to respiratory rate. In many formulas, TCT ≈ 60 seconds divided by the breaths per minute (RR). So when RR increases, the time available for each breath shortens, causing TCT to decrease. For example, doubling RR from 12 to 24 breaths per minute reduces TCT from about 5 seconds per cycle to about 2.5 seconds per cycle. Therefore, increasing RR trends toward a shorter total cycle time.

Total cycle time is the duration of one complete breath, and it is inversely related to respiratory rate. In many formulas, TCT ≈ 60 seconds divided by the breaths per minute (RR). So when RR increases, the time available for each breath shortens, causing TCT to decrease. For example, doubling RR from 12 to 24 breaths per minute reduces TCT from about 5 seconds per cycle to about 2.5 seconds per cycle. Therefore, increasing RR trends toward a shorter total cycle time.

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