The physician has ordered heparin 4500 units subcutaneous (SQ) daily.

The medication is supplied in heparin 10,000 units in 1 mL. How many milliliters will the nurse administer? (Shade SYRINGE #4 TO CORRECT DOSE: ROUND TO HUNDRETHS PLACE: LABEL CORRECTLY TO RECEIVE CREDIT)

Choice A rationale

A tuning fork is a U-shaped instrument that, when struck, produces a specific frequency of vibration. In audiology, it is used to assess both air conduction (sound transmitted through the external and middle ear to the inner ear) and bone conduction (sound transmitted directly to the inner ear through the skull), aiding in differentiating types of hearing loss.

Choice B rationale

A penlight is a small, handheld light source primarily used for illuminating body cavities, assessing pupillary reflexes, or examining the oral cavity and throat. It does not produce sound vibrations and is not used for measuring air or bone conduction in the ear.

Choice C rationale

A reflex hammer is an instrument used to elicit deep tendon reflexes by tapping on tendons, stretching the muscle, and activating the reflex arc. It is a neurological assessment tool and has no function in measuring auditory conduction.

Choice D rationale

An otoscope is a medical device equipped with a light and magnifying lens, used for visual examination of the external ear canal and tympanic membrane (eardrum). While essential for ear assessment, it does not measure air or bone conduction; rather, it allows for direct visualization of anatomical structures.

Choice A rationale

Orientation to person, place, and time is a fundamental component of cognitive assessment, indicating intact neurological function. Knowing one's full name demonstrates personal orientation. Recognizing the hospital and its location signifies place orientation. Providing the correct month and year, even without the exact day, suggests a reasonable grasp of temporal orientation, reflecting adequate higher cortical processing.

Choice B rationale

The inability to state one's location and an incorrect year indicate significant deficits in both place and time orientation. This suggests impaired cognitive function, potentially due to delirium, dementia, or other neurological issues affecting memory and executive functions. Such a response would warrant further comprehensive cognitive evaluation.

Choice C rationale

While knowing one's name indicates personal orientation, confusion about the date points to a deficit in time orientation. This partial disorientation suggests some level of cognitive impairment, necessitating further assessment to determine the underlying cause and extent of the confusion.

Choice D rationale

Hesitation regarding location and complete inability to state the date demonstrate significant disorientation to both place and time. This pattern of response is indicative of impaired cognitive function and necessitates a thorough neurological and cognitive workup to identify potential etiologies.