CNIM Exam 2 with complete solutions

Which of the following are most likely to cause airborne contamination in an operating room? A- ventilation devices B- Kerrison particles C- dust particles D- bloodborne pathogens - Answer- C- dust particles Stimulus artifact during SSEPs can be decreased by A- keeping the instrument away from florescent lights and video monitors B- separating stimulating cables from cables of other equipment C- lowering the impedances of ground and stimulating electrodes D- using enough muscle relaxant - Answer- C- lowering the impedances of ground and stimulating electrodes All of the following are true of "informed consent" for an operative procedure except A- one of the purposes of the consent is to protect the surgeon and hospital from unauthorized operative procedures B- the patient may have sedation before the consent is signed C- the surgeon must be informed if the consent has not been signed before surgery starts D- if illiterate, the patient signs with an "X", after which the witness writes "patient's mark" - Answer- B- the patient may have sedation before the consent is signed If you have high frequency noise in a BAEP: A- Change LFF to 30 Hz B- Change LFF to 150 Hz C- Change HFF from 3000 to 1500 Hz D- Change HFF to 200 Hz - Answer- C- Change HFF from 3000 to 1500 Hz Electromagnetic inductance A- should never occur in the operating room B- results only from wires that are not insulated C- results only from poor ground wires D- is produced when a wire carrying current induces a magnetic field that in turn creates current in other wires - Answer- D- is produced when a wire carrying current induces a magnetic field that in turn creates current in other wires The area of greatest risk for ischemic injury during carotid endarterectomy is A- the middle cerebral artery B- the posterior cerebral artery C- the anterior communicating artery D- the posterior cerebral artery - Answer- A- the middle cerebral artery When recording a posterior tibial nerve SSEP, the Fpz ‐ C5s channel records A- subcortical near‐field potentials B- stationary lumbar potentials C- the Erb's point potential D- subcortical far ‐ field potentials - Answer- D- subcortical far ‐ field potentials Needle electrodes should be discarded and not resterilized if A- the patient has Hodgkin's disease B- the patient has Jakob ‐ Creutzfeldt disease C- the patient has Meniere's disease D- the patient has Korsakoff's psychosis - Answer- B- the patient has Jakob ‐ Creutzfeldt disease Decreased synchronization of the auditory nerve firing will likely result in A- a decrease in wave amplitude B- no change in wave amplitude or latency C- a decrease in wave latency D- an increase in wave amplitude - Answer- A- a decrease in wave amplitude Universal Precautions A- Strategy for preventing disease protection B- Handwashing after every meal C- The assumption that every patient has AIDS D- Use of PPDs with every patient - Answer- D- Use of PPDs with every patient Upper extremity SEPs are transmitted through the: A- the lateral lemniscus B- gracilis nucleus C- the medial geniculate bodies D- cuneate nucleus - Answer- D- cuneate nucleus Which describes a semi‐critical infectious device? A- Requires low level disinfection after each B- Requires high to intermediate disinfection after each use C- Requires no disinfection after each use use D- Requires sterilization after each use - Answer- B- Requires high to intermediate disinfection after each use Low frequency sounds are A- at the apex of the cochlea B- near the stapes C- perceived along Reissner's membrane D- near the round window - Answer- A- at the apex of the cochlea When monitoring with SSEPs, dural or direct cord recordings are advantageous because: A- they have less chance of artifact during cauterization B- the waveforms are higher in amplitude and require fewer averages C- the waveforms better reflect cortical responses to stimulation D- they present less discomfort to the patient than scalp leads - Answer- B- the waveforms are higher in amplitude and require fewer averages Language A- is in the right cerebral hemisphere in 85% of the population B- is in the left cerebral hemisphere in 85% of the population C- is localized in the parietal lobe D- localization depends on the age of the patient - Answer- B- is in the left cerebral hemisphere in 85% of the population Dwell time can be defined as A- the D to A conversion B- the intersample interval C- the sample rate of the signal's amplitude