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Mechanical Bowel Obstruction and Ileus - Pathogenesis and Clinical Findings
Ileus: Functional bowel "blockage", no peristalsis
Mechanical Obstruction:
Mechanical Bowel Obstruction ... pain • Flat/low ... JVP, resting tachycardia ... percussion • Nausea ... #sbo #ileus #pathophysiology
Shock - Pathophysiology 
Inadequate tissue perfusion to meet O2, nutrient requirements
1. Distributive Shock
2. Hypovolemic Shock
3. Cardiogenic
Shock - Pathophysiology ... Obstructive Shock ... #Shock #Pathophysiology ... differential #diagnosis #algorithm ... #causes
The Diagnostic Approach to Hyperkalemia
Drugs
 - Amiloride
 - Spironolactone
 - Triamterene
 - Trimethoprim
 - Pentamidine
 -
inhibitors Other causes ... Urinary tract obstruction ... Ketoconazole Low ... #Hyperkalemia #Algorithm ... #differential #causes
Causes of Hypokalemia - Differential Diagnosis Algorithm
Increased Loss 
 - Increased GI Loss
 - Increased Urinary
Causes of Hypokalemia ... Differential Diagnosis Algorithm ... Differential #Diagnosis #Algorithm ... #causes #potassium ... #low #pathophysiology
Commonly Used Diagnostic Tests for Celiac Disease

Tissue transglutaminase (tTG) IgA antibodies
 - Most reliable noninvasive test
negative if on low-gluten ... Celiac #Disease #Testing ... Tests #Diagnosis #Workup ... #Table
Features of a Sickle Cell Crisis 
Sickle-cell disease - an autosomal recessive blood disorder.
Characterized by red
Crises can be precipitated ... with severe pain, lasting ... The underlying pathophysiology ... Vaso-ocdusion- Obstruction
Primary Adrenal Insufficiency:
 • ACTH stimulation test - Synthetic ACTH does not stimulate cortisol secretion because
between 8 and 9 AM - Low ... aldosterone - Low ... in cases in which ... laboratory #diagnosis #testing ... endocrinology #workup
Causes of Constipation in Adults
Most common
 - Inadequate fiber or fluid intake
 - Poor bowel habits
Systemic
Causes of Constipation ... Colonic mass with obstruction ... Idiopathic megarectum Slow ... Psychogenic - Eating ... #Constipation #Causes