Your Patient Has a Long History of COPD with CO₂

question 7

Multiple Choice

Your patient has a long history of COPD with CO₂ retention.He now is admitted for acute respiratory failure due to a lung infection.His PaCO₂ has acutely elevated to over 70 mmHg.The physician decides to intubate and use mechanical ventilation.What should be your goal with the mechanical ventilation?

• A)Return the PaCO₂ to about 40 mmHg
• B)Return the PaCO₂ to about 50 mmHg
• C)Lower the PaCO₂ enough to return the pH to 7.35
• D)Lower the PaCO₂ enough to return the pH to 7.50

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Definitions:

Prezygotic Barriers

Mechanisms that prevent mating or fertilization between species, ensuring reproductive isolation and species divergence.

Postzygotic Barriers

Reproductive isolating mechanisms that occur after fertilization, preventing the development of viable or fertile offspring between different species.

Temporal Isolation

A mechanism of reproductive isolation in which different species breed at different times, preventing them from interbreeding.

Habitat Isolation

A prezygotic barrier where two species live in different habitats within the same area but do not meet, preventing them from mating.