**Question:** Toxic effects of high oxygen tension include all of the following except

A. Pulmonary edema
B. Increased risk of lung cancer
C. Increased risk of deep vein thrombosis
D. Acidosis

**Core Concept:** High oxygen tension, also known as hyperoxia, occurs when there is an excess of oxygen in the body. It can lead to various toxic effects in the body, including:

* Pulmonary edema: This is the build-up of fluid in the lungs, which can impair oxygen exchange and lead to respiratory distress.
* Increased risk of lung cancer: Excessive exposure to high oxygen levels has been linked to an increased risk of lung cancer development.
* Acidosis: High oxygen levels can lead to acidosis, which is an imbalance of acids and bases in the body, potentially causing cellular damage and dysfunction.

**Why the Correct Answer is Right:**

Option B (Increased risk of deep vein thrombosis) is not related to high oxygen tension. Hyperoxia is primarily associated with lung and cellular damage, whereas deep vein thrombosis (DVT) is a condition caused by blood clot formation in the deep veins of the legs due to factors such as immobility, trauma, or inflammation. DVT is not directly linked to high oxygen levels.

**Why Each Wrong Option is Incorrect:**

* A (Pulmonary edema): This is a consequence of high oxygen tension, as mentioned above, and is therefore an example of a toxic effect.
* C (Increased risk of deep vein thrombosis): As explained, this is not a direct consequence of high oxygen levels but rather a condition associated with other factors.

**Clinical Pearl:** It is crucial for medical professionals to be aware of the toxic effects of high oxygen tension and monitor patients' oxygen levels to prevent complications. Maintaining appropriate oxygen saturation levels is essential for optimal patient care and reducing the risks associated with hyperoxia.