Certified Hyperbaric Technologist Practice Test

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Study for the Certified Hyperbaric Technologist Test using flashcards and multiple-choice questions with detailed explanations. Enhance your readiness and ace your certification exam!

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How many half-time units are required for a given tissue to eliminate almost 98.5% of available nitrogen, according to Haldane?

4 half-time units
5 half-time units
6 half-time units
7 half-time units

The correct answer is: 6 half-time units

To determine how many half-time units are required for a given tissue to eliminate approximately 98.5% of the available nitrogen, it’s important to understand the concept of half-time in the context of gas elimination from the body, particularly in hyperbaric medicine. Every half-time unit is a measurement of time during which half of the remaining amount of gas is eliminated from the tissues. Starting from 100% of the gas, the process of elimination follows an exponential decay model. Here’s how it breaks down: - After 1 half-time unit, 50% of the nitrogen remains. - After 2 half-time units, 25% of the nitrogen remains. - After 3 half-time units, only 12.5% remains. - After 4 half-time units, about 6.25% remains. - After 5 half-time units, approximately 3.125% remains. - After 6 half-time units, around 1.56% remains. - After 7 half-time units, the residual nitrogen is less than 0.78%. To eliminate 98.5% of nitrogen, the tissue must get down to around 1.5% of the original nitrogen. Based on the breakdown