PTA Physical Therapy Assistant

Answer: D - Respiratory muscle fatigue is not an indication to prescribe head down position.

The benefit of head down position is that it will increase the oxygen transport.
This position displaces the weight of the viscera cephalic under the diaphragm. So the diaphragm is positioned in more mechanically efficient position.
When there is respiratory muscle fatigue the diaphragm is added with further more weight of viscera which leads to increased resisted loading. Therefore, the patient may feel distress in this position.

The patient gets relief from symptoms mentioned in the other options.