74 results
Causes of Abnormal PT and/or aPTT
Prolonged Prothrombin Time (PT)
1. Acquired deficiency of FVII
Causes of Abnormal ... deficiency of FVII ... Pre-analytical cause ... aPTT #Prolonged #Causes ... #diagnosis #differential
Differential Diagnosis for a Prolonged PT and aPTT
If the PT and the aPTT are both prolonged,
Differential Diagnosis ... Causes include : ... Pre-analytical cause ... , FVII, FIX, FX ... #diagnosis #differential
Upper Extremity Dermatomes and Myotomes
Motor Function
Shoulder:
 • Abduction - C5,C6 (axillary)
 • Adduction - C6, C7,
Biceps Jerk - ... Erb's Palsy is caused ... palsy" is a common cause ... Tunnel Syndrome - Causes ... Dislocation - May cause
Lower Extremity Dermatomes and Myotomes
Reflexes: 
 • Knee - L2, L3, L4
 • Ankle - S1
Ankle - S1 • Biceps ... - C5, C6 • Triceps ... - C6, C7, C8 ... Commonly caused
Spinal Cord Injury by Nerve Root Levels
Spinal Root	Sensory	Motor	Reflex
C4	Acromioclavicular Joint	Respiration	None
C5	Radial Antecubital Fossa	Elbow Flexion	Biceps Reflex
C6	Dorsal Thumb	Wrist Extension	Brachioradialis Reflex
C7	Dorsal
Elbow Flexion Biceps ... Brachioradialis Reflex C7 ... Elbow Extension Triceps ... NerveRoots #Levels #differential
Hypertension and Altered Mental Status (AMS) - Differential Diagnosis Framework

Hypertension:
 • Hypertensive emergency
 • Hypertensive encephalopathy
Status (AMS) - Differential ... Hyperthyroidism CNS ... /agitation • CNS ... encephalopathy #altered #Differential ... #Diagnosis #causes
Causes of Nausea and Vomiting - Differential Diagnosis Framework

Chemoreceptor Trigger Zone/Area Postrema:
 • Drugs:
	- Chemo agents
	-
Causes of Nausea ... and Vomiting - Differential ... Hyperthyroidism Cortex/CNS ... vomiting #emesis #differential ... #diagnosis #causes
Faget's Sign & Liebermeister's Rule
Pulse-Temperature Dissociation
EVERY 1 F RISE IN TEMPERATURE -> HR INCREASES 8-10 BPM
INFECTIOUS
BPM INFECTIOUS CAUSES ... Beta Blockers • CNS ... help hone your differential ... Dissociation #diagnosis #differential ... #causes
Differential Diagnosis for Hemolytic Anemia
Intrinsic Causes:
 • Enzyme deficiencies ex. G6PD, pyruvate kinase 
 • Hemoglobinopathies
Differential Diagnosis ... Anemia Intrinsic Causes ... , spider/snake bites ... Hemolytic #Anemia #Differential ... #Diagnosis #causes
Faget Sign - Pulse-Temperature Dissociation
Causes of Relative Bradycardia
 • Infectious Causes: Legionella, Psittacosis, Q fever, Typhoid
Dissociation Causes ... • Infectious Causes ... Non-Infectious Causes ... Beta-blockers, CNS ... #bradycardia #differential