You are transporting your 78-year-old patient for a CT scan. She has a history of COPD and has had a tracheostomy for several months. She normally has an effective cough to clear any secretions, but mid-transport, you notice that she starts seeming restless and agitated. Her pulse oximeter begins to alarm, and on auscultation, you hear rhonchi bilaterally. You suspect that she may need to be suctioned to remove a mucus plug. You flip the switch on the portable suction machine attached to the transport bed, and you hear... nothing. Even though the battery was charging for hours, your portable suction machine won’t operate.