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Mechanical Bowel Obstruction and Ileus - Pathogenesis and Clinical Findings
Ileus: Functional bowel "blockage", no peristalsis
Mechanical Obstruction:
Findings Ileus: Functional ... acute abdominal pain ... "light-switch pain ... percussion • Nausea ... #sbo #ileus #pathophysiology
Imaging Modalities for Renal Calculus

AXR. KUB
 - Good far calcium-containing stones useful when limited radiation dose
non-invasive - High ... - Able to identify ... non-calculus causes ... flank or abdominal pain ... detection with function
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
Hyperkalemia Differential Diagnosis Algorithm
R/O Pseudo-hyperkalemia:
 • Possible Lab error! Alwavs Repeat Blood sample!
 • Leukocytosis, Thrombocytosis:
Differential Diagnosis Algorithm ... TTKG should be high ... Differential #Diagnosis #Algorithm ... #causes #potassium ... #high #pathophysiology
The Diagnostic Approach to Hyperkalemia
Drugs
 - Amiloride
 - Spironolactone
 - Triamterene
 - Trimethoprim
 - Pentamidine
 -
inhibitors Other causes ... Urinary tract obstruction ... transplant - SLE High ... #Hyperkalemia #Algorithm ... #differential #causes
Major Segments of the Nephron and their Functions 
 - Glomerulus - Formation of glomerular filtrate
Nephron and their Functions ... organic acids and bases ... Nephron #Segments #Function ... #Pathophysiology ... #Tubules #Table
Features of a Sickle Cell Crisis 
Sickle-cell disease - an autosomal recessive blood disorder.
Characterized by red
Crises can be precipitated ... associated with severe pain ... The underlying pathophysiology ... Vaso-ocdusion- Obstruction
Causes and Assessment of the Child with Recurrent Abdominal Pain
> 90% no structural cause identified
Gastrointestinal
 •
Causes and Assessment ... Recurrent Abdominal Pain ... Pelvi-ureteric junction ... (PUJ) obstruction ... Recurrent #Abdominal #Pain
Differential Diagnosis of Respiratory Acid-Base Disorders
Alkalosis
A. Central nervous system stimulation: Pain, Anxiety, psychosis, Fever, Cerebrovascular accident,
system stimulation: Pain ... tissue hypoxia: High ... Airway: Obstruction ... differential #diagnosis #causes