Stool specimens can be collected immediately after a radiology procedure

A urine sample is diluted 1:3 before testing. The test results identify 50 ?g phenylpyruvate. What is the dilution factor that the result must be multiplied by to determine the true concentration of phenylpyruvate in the urine?

A) 1 B) 3 C) 10 D) 50

A female patient, who receives oxygen at home by concentrator, calls in to the providing home care company. When the call is routed to the respiratory therapist, the patient indicates the oxygen concentrator is not working even though the switch is "on" position and the machine is plugged in. The respiratory therapist should first ask the patient to

A. perform a flow calibration on the concentrator. B. check the circuit breaker. C. remain at rest until a therapist arrives. D. switch to her 'E' cylinder for oxygen.