Optical coherence tomography diagnostic signs in posterior ...
Day 2 Diagnostic Tests Computer Tomography Scan - CT
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Transcript of Day 2 Diagnostic Tests Computer Tomography Scan - CT
Day 2
Diagnostic Tests
Computer Tomography Scan - CT
Description X-rays computer
generated 3-D picture Distinguishes tissue
density Tumors
Machine moves around still patient
Non-invasive & painless
With or without contrast medium
Computer Tomography Scan - CT
Nursing Considerations Explain procedure
30-60 minutes Lying still
If contrast medium is used
for iodine & shellfish allergies
NPO (4 hrs) Push fluids after
procedure watch for S&S of ICP
Computer Tomography Scan - CT
Computer Tomography Scan - CT
Brain abscess Blood flow after pTA
Computer Tomography Scan - CT
Area of brain not getting blood flow
Computer Tomography Scan - CT
5 month old meningitis
Computer Tomography Scan - CT
Positron Emission Tomography (PET)
Description Computerized nuclear
imaging actual organ functioning
Via radioactive substances
Used to ID: Blood supply Metabolic activity
glucose
Positron Emission Tomography (PET)
Nursing Considerations Teach inhalation technique &
warn about unusual sensation that might occur Dizziness Lightheadedness Headaches
Pre-op No caffeine No smoke NPO
Post-op Push fluids
Blood flow and glucose uptake are measured by PET in order to identify seizure sites in the brain. In 80% of patients there is an increase in blood flow and glucose metabolism during a seizure in the cerebral cortex.
However, between seizure there tends to be a lower than normal glucose uptake and blood flow
Patients have a higher than normal blood flow to the basal ganglia on the opposite side to the effected limbs. L-dopa reduces the blood flow to the basal ganglia but over time can increase the local metabolic rate. There is also a lack of communication between the frontal and parietal and the frontal occipital lobes.
PET scans show in patients with mild Alzheimer's and in more advanced cases glucose metabolism is reduced in both the temporal and parietal lobes. Patients with a greater amount of language dysfunction than problems with spatial sight display a significant reduction in metabolism in the left frontal, temporal and parietal lobes. Cases with greater visual spatial impairment have a diminished glucose metabolism in the right parietal lobe
Magnetic Resonance ImagingMRI
Description Magnetic field + radio
waves Used to ID:
Edema Hemorrhage Tumors
Moved into a tube Claustrophobia
Takes 45-60 min Lay flat & motionless Noisy
Magnetic Resonance ImagingMRI
Nursing Considerations Remove all metal
Aneurysm clips Orthopedic hardware Pacemakers Heart valves Intrauterine devices
(IUD’s) Cochlear implants Watches, credit cards,
metal Relaxation techniques
CT scan MRI
Eye CA Pineal CA
Aneurysm 28yrs old Female smoker
Aneurysm 28yrs old Female smoker
Brain CA Brain CA
Brain Abscess Note herniation
Cerebral angiography
Description X-ray of cerebral
circulation with contrast agent
Used to ID Vascular disease Aneurysms
Tread catheter Femoral artery Aortic arch Carotid artery
Cerebral angiography
Nursing Considerations Pre-op
Well hydrated Mark peripheral pulses for iodine allergies contrast medium
injected feeling of warmth
Cerebral angiography
Nursing Considerations Post-procedure
Sand bag leg Bed rest over night VS and neuro checks Observe puncture site Distal pulses Bradycardia/hypotension
= vagal stim for difficulty breathing
ICP Monitor LOC
MRI 28yo female
Angiography
Myelography
Description X-ray of the spinal
sub-Arachnoid space
Injection of contrast medium
via lumbar puncture
Myelography
Nursing Considerations Explain NPO Post-procedure
Lie HOB 30 – 45
Bed rest x 3 hrs fluids
Bad signs H/A Temp Stiff neck Photophobia Seizures
Electroencephalography (EEG)
Description Measures electrical
impulses of the brain brain waves
Electrodes applied to the scalp
- 16 Used to diagnosis
Seizures Coma Brain death
Obtain an baseline Quiet & dark
Stimulation Flashing lights
Electroencephalography (EEG)
Nursing Considerations Duration: 1 hour seizures
sleep deprivation No anti seizure meds,
tranquilizers, stimulants, depressants
No caffeine OK to eat
Normal
Petite Mal Generalized Seizure
Electromyography
Description Needle electrodes put
into skeletal muscles Measure changes in
electrical potential of the muscle.
Used to diagnose Neuromuscular
disorders
Electromyography
Nursing Considerations
Explain not going to be
electrocuted Needle, like a IM
injection Muscles may ache
Lumbar Puncture
Description Puncture of lumbar
Subarachnoid space @ L 3-4 level Used to
Extract CSF Relieve ICP Test Spinal fluid
pressure Introduce
antibiotics radiopaque dyes anesthesia
Lumbar Puncture
Nursing Considerations
Pre-procedure Side lying with legs
pulled close to chin Do not move Painful – pressure Shooting pain down
leg 10 minutes
Lumbar Puncture
Post-procedure Bed rest Fluid (unless…) Observe for side
effects
Lumbar Puncture
Post-puncture headaches Duration
Hrs to days Cause
Unknown Tx. / prevention
Bed rest Quiet dark room Analgesics fluids