Labs/Imaging Flashcards
acne vulgaris
none
rosacea
none
depression
PHQ-9, CBC
Dementia
CBC. CMP, B12, folate, syphilis testing, arterial blood gasses, UA, ECG, EEG, toxicology, CT, MRI, lumbar puncture, chest x-ray
impetigo
bacterial culture
folliculitis
bacterial culture
furuncle
incision + drainage for bacterial culture
carbuncle
same as furuncle (incision + drainage for bacterial culture)
erythema infectiosum
IgM, IgG can be measured
measles
IgM and IgG titers
rubella
IgG and IgM titers
pityriasis rosacea
If present on palms and/or soles - check RPR (to rule out secondary syphilis)
scarlet fever
culture for group A strep
roseola
none
hand, foot, and mouth disease
none
insect bites
biopsy (occasionally needed)
bed bugs
none (observe environment for bugs, stains)
herpes simplex virus
- viral culture
- Tzanck smear
- screen for STIs + HIV (if hx warrants)
herpes zoster
- viral culture
- Tzanck smear
varicella zoster
ELISA titers (can confirm acute infection)
candidiasis
- KOH
- culture
tinea
- KOH
- culture
pityriasis (tinea) versicolor
- KOH
eczema/atopic dermatitis
- serum IgE
- culture for bacteria or HSV if indicated
contact/allergic dermatitis
patch testing
psoriasis
- ASO titer or strep culture (if indicated)
- HIV testing (if indicated)
- biopsy
seborrheic dermatitis
HIV testing (if indicated)
erythema multiforme
- skin biopsy
- chest x-ray (for Mycoplasma)
urticaria
- biopsy
- general workup to rule out systemic disease (for chronic urticaria)
malignant melanoma
- skin biopsy
- excisional biopsy
BCC
skin biopsy
SCC
- skin biopsy
- excisional biopsy
Delirium
CBC. CMP, B12, folate, syphilis testing, arterial blood gasses, UA, ECG, EEG, toxicology, CT, MRI, lumbar puncture, chest x-ray
Prostate cancer
CBC. CMP, B12, folate, syphilis testing, arterial blood gasses, UA, ECG, EEG, toxicology, CT, MRI, lumbar puncture, chest x-ray
DM
UA, serum glucose, hgA1C, insulin
Menopause
sleep diary, FSH/LH, TSH
Medication induced insomnia
none
Delayed sleep phase syndrome
sleep specialist
Narcolepsy
sleep specialist
Obstructive sleep apnea
sleep study, polysomnography, home testing
Periodic limb movement
sleep study
Restless leg
sleep study, serum ferritin
Multiple Myeloma
Monoclonal proteins, UA, peripheral smear, bone marrow, CT,
Thoracic outlet syndrome
electrodiagnostic testing, scalene muscle test injection, x-ray, US, CT, MRI
Lead
blood lead levels, X-ray fluorescence,
Tarsal tunnel
US, electrodiagnostic testing, MRI
Carpal tunnel
US, electrodiagnostic testing, MRI
Amyotrophic lateral sclerosis (ALS)
electrodiagnostic studies, MRI,
Guillain-Barré syndrome
CBC, lumbar puncture, Electrodiagnostic studies, CBC, CMP, ESR, serum glucose,
Diabetic neuropathy
Electrodiagnostic testing, insulin, hgA1c, CMP, fasting glucose
HIV
HIV RNA, HIV antigen, CBC
Lyme
western blot, ELISA
Rhabdomyolysis
creatine kinase, UA, BC, BUN, creatinine, CMP, liver function test, PT, aPTT, d-dimer, fibrinogen
Hyponatremia
CMP, CBC, serum osmolality
Hypernatremia (diabetes insipidus)
urine osmolality, UA specific gravity, CMP
Adrenal insufficiency/Addisons disease
ACTH stimulation test, serum cortisol, salivary cortisol, urinary cortisol,
Chronic Kidney disease
CMP, US, UA, creatinine, eGFR
Hypoparathyroidism
CMP, serum PTH, Mg, Phosphate, Vit D metabolites
Hypophosphatemia
24-hour urine collection, CMP, electrolytes
Hypokalemia
ECG, CMP
Cushing’s syndrome
salivary cortisol, 24-hour urinary free cortisol, dexamethasone suppression test, fasting blood glucose
Sjogrens
CBC with differential, ESR, total globulins, immunoglobulin, UA, CMP, urine protein/creatinine
RA
ESR, rheumatoid factor, CBC, x-ray
Systemic sclerosis
CBC with differential, serum creatinine levels, creatine kinase, UA with urine sediment, ANA, serologic testing
SLE
CMP, kidney function tests, antinuclear antibodies, ESR
Dermatomyosisits
CK, aldolase, CBC with differential, CMP, ESR, CRP, TSH, serologic tests
Polymyositis
CK, aldolase, CBC with differential, CMP, ESR, CRP, TSH, serologic tests
Inclusion body myositis
creatinine kinase, CMP, lactate dehydrogenase, serum aminotransferases, TSH, autoantibodies
MS
MRI, CSF analysis, autoantibody testing, optical coherence tomography
Fibromyalgia
CBC, ESR, CRP
Cancer
CBC, leukocyte count, CMP, UA, glucose, hgA1c, TSH, HIV, ESR, CRP, x-ray
Anemia
CBC with differential, ferritin, serum iron, transferrin, TIBC
Hypothyroid
TSH, antibodies, T3, T4
Myasthenia gravis
ice pack test, edrophonium test, failure of neuromuscular blockade reversal, serologic testing
Intracerebral hemorrhage
CT, MRI
Brain abscess
MRI, serologic evaluation for a parasitic pathogen, cryptococcal antigen
Pseudotumor cerebri
CT
Subdural hematoma
CT
Hydrocephalus
CT
Intracranial tumor
CT
Dietary ingestion (tyramines, MSG, and nitrates)
blood chemistry
Drug withdrawal
blood chemistry
Severe hypoglycemia
blood glucose or continuous glucose monitoring
Carbon monoxide poisoning
blood gasses and carboxyhemoglobin levels
Temporal arteritis
elevated ESR
Cervical spine disorders
x-ray
Optic neuritis
ophthalmology
Trigeminal neuralgia
MRI
Meningitis
lumbar puncture, CBC with differential, CMP, BUN, creatinine, PT, thrombin time, blood culture
Otitis media
pneumatic otoscopy, tympangram
Pharyngitis
throat culture, CBC, monospot, rapid strep test
Dental disorders
dental referral
Sinusitis
x-ray
Benign exertional headache
MRI, CT
Cluster headache
MRI
Mixed headache
MRI
Migraine w/o aura
none
Migraine w/ aura
none
Tension-type headache
none
Head Trauma
MRI or CT
Ototoxic and salt-retaining drugs
audiometry
Neurosyphilis
serology for syphilis
Arrhythmia
EKG, Holter monitor
Orthostatic
tilt table
Anxiety
hyperventilation, GAD7, AUDIT, CBC, CMP, TSH, T3/T4, salivary cortisol, urine drug screen
Reflex syncope
ECG, tilt table