Medicaid claims that are denied due to incomplete information can be corrected and resubmitted

A patient has sustained an injury to his mediastinum. Based on the anatomy of his chest, which of the following structures may have been injured?

a. The diaphragm b. The esophagus c. The lungs d. A bronchus

At 3 to 5 L/min output, a typical molecular sieve O2 concentrator provides O2 concentrations at what level?

a. 65% to 78% b. 78% to 85% c. 85% to 93% d. Greater than 93%