Final answer:
The supervising nurse's concern regarding the demonstrated tracheostomy suctioning procedure is most likely related to an increased risk of impaired gas exchange. Complications could include hypoxemia and atelectasis, and there is also a risk factor of infection from contaminated equipment.
Step-by-step explanation:
When a newly hired nurse demonstrates suctioning of a tracheostomy, the supervising nurse's concern is most likely about increasing the client's risk for impaired gas exchange. Suctioning, if performed improperly, can lead to complications relating to the airway and breathing. Specifically, issues like hypoxemia from prolonged suctioning and atelectasis from too much negative pressure can arise, both of which are related to gas exchange impairments. Additionally, the risk of an infection is linked to the introduction of bacteria via contaminated equipment during medical procedures such as intubation and suctioning. Therefore, to minimize these risks, the procedure must be carried out with meticulous attention to sterile technique and adherence to proper suctioning protocols.