253 results
USMLE Epidemiology and Biostatistics Summary
Meta-Analysis: pools data from several studies (greater power), limited by quality/bias of
Proves cause-effect ... tests are TN. ... who test negative ... proportion of negative ... #calculations #diagnosis
Commonly Used Diagnostic Tests for Celiac Disease

Tissue transglutaminase (tTG) IgA antibodies
 - Most reliable noninvasive test
Commonly Used Diagnostic ... specificity - Falsely negative ... ) - May be negative ... HLA-DQ8 - High negative ... #Diagnosis #Workup
Gastrointestinal Evaluation of Iron Deficiency Anemia
In patients with anemia, diagnose iron deficiency if:
 • Ferritin <
patients with anemia, diagnose ... Test for celiac ... disease with serology ... endoscopy only if: • Negative ... Evaluation #workup #diagnosis
The head impulse test (HIT) result is positive (abnormal) in nearly all patients with a peripheral
The head impulse test ... of AVS and negative ... with a central cause ... #Diagnosis #PhysicalExam ... #Neurology #AVS
Relative Afferent Pupillary Defect

This maneuver of intermittent light stimulus is called the alternating light test or
alternating light test ... very sensitive diagnostic ... regarding the cause ... Pupillary #Defect #Neurology ... #Clinical #Video
Endocarditis Algorithm - Infective vs Noninfective Causes
Noninfective:
 • Malignancy
 • Autoimmune disease
 • Systemic infection
Native Valve
vs Noninfective Causes ... • Autoimmune disease ... HACEK • Culture-negative ... #Noninfective #Causes ... #Differential #Diagnosis
HINTS Exam - Abnormal Head Impulse Test = Peripheral Cause

This video demonstrates:
1) Normal Head Impulse Test
= Peripheral Cause ... This video demonstrates ... for a PERIPHERAL cause ... Video by Dr. ... #Neurology #Vertigo
Diagnostic Algorithm for Dizziness and Vertigo
Peripheral Vertigo:
 • Attacks: Sudden, severe, can last anywhere from seconds
Diagnostic Algorithm ... with vascular causes ... positional episodes caused ... Méniére's disease ... #differential #diagnosis
HINTS Exam - Abnormal Test of Skew (Abnormal Vertical Skew)

In a patient with vertigo symptoms, this
Exam - Abnormal Test ... for a CENTRAL cause ... Video by Dr. ... Vertical #Skew #Test ... #Neurology #Vertigo
HINTS Exam - Abnormal Head Impulse Test = Peripheral Cause

This video demonstrates:
1) Normal Head Impulse Test
= Peripheral Cause ... This video demonstrates ... for a PERIPHERAL cause ... Video by Dr. ... #Neurology #Vertigo