For the chain of infection to occur, a ________ must be present

You are caring for a patient with known sickle cell disease. You would also examine this patient for the presence of:

A) glaucoma. B) atraumatic hyphema. C) cataract. D) papilledema.

Another crew has called for your assistance in extricating an obese male with a nosebleed from a third-floor bedroom. As you enter the room, which observation indicates proper management of the patient's condition?

A) The patient is supine, head turned to the side, blood draining from the nose and mouth, with a cold pack applied to the bridge of the nose B) The patient is sitting upright, head tilted back, with sterile gauze packed in each nostril C) The patient is lying on his side, a loose dressing has been applied below his nose, and a cold pack is on the bridge of his nose D) The patient is sitting upright, leaning forward, with nostrils pinched shut