Condition which builds within hemithorax resulting in collapsed lung, flattened diaphragm, contralateral mediastinal shift and compromised venous return to right side of hea is known as: September 2007
**Core Concept**
A hemithorax condition that leads to a collapsed lung, flattened diaphragm, contralateral mediastinal shift, and compromised venous return to the right side of the heart is a result of increased intrathoracic pressure. This condition compromises both respiratory and cardiovascular functions.
**Why the Correct Answer is Right**
The condition described is likely due to a massive pleural effusion, which is a collection of fluid in the pleural space of the lung. This fluid accumulation increases the pressure within the hemithorax, leading to the collapse of the lung (atelectasis), flattening of the diaphragm, and a shift of the mediastinum to the opposite side. The increased intrathoracic pressure also impairs venous return to the right side of the heart, compromising cardiac output.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not specified, but it is not relevant to the condition described.
* **Option B:** This option is not specified, but it is not relevant to the condition described.
* **Option C:** This option is not specified, but it is not relevant to the condition described.
* **Option D:** This option is not specified, but it is not relevant to the condition described.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that massive pleural effusions can lead to severe respiratory and cardiovascular compromise, requiring prompt intervention to relieve the pressure and restore normal hemodynamics.
**Correct Answer: C. Tension Pneumothorax.**