Dr. Gerald Diaz @GeraldMD
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Board Certified Internal Medicine Hospitalist, GrepMed Editor in Chief πŸ‡΅πŸ‡­ πŸ‡ΊπŸ‡Έ - Sign up for an account to like, bookmark and upload images to contribute to our community platform. Follow us on IG: https://www.instagram.com/grepmed/ | Twitter: https://twitter.com/grepmeded/
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Approach to Acid Base Disorders - Evaluation and Differential Diagnosis
1) Start with the Anion Gap (AG).
2)
Evaluation and Differential ... 3) Now, look at ... the chronicity (acute ... , chronic, or acute ... can be done by using
Metabolic Alkalosis - Urinary Chloride Algorithm
Cl- responsive metabolic alkalosis
 β€’ Kidney loss of Cl-
- Urinary Chloride ... β€’ Normal/low ... #Urinary #Chloride ... urine #Algorithm #nephrology ... #differential #
Acute Kidney Injury (AKI) - Differential Diagnosis Framework

PRE-Renal AKI:
 β€’ Hypovolemia
 β€’ Congestion
 β€’ Medications
 β€’
Acute Kidney Injury ... (AKI) - Differential ... Congestion β€’ Medications ... AKI: β€’ Urinary ... Diagnosis #nephrology
Hypokalemia - Differential Diagnosis
Poor Intake 
 - Starvation
 - Anorexia
GI Losses 
 - Vomiting / NG
Ureterosigmoidostomy Urinary ... tubular acidosis ... Catecholamines - Alkalosis ... #Diagnosis #Low ... #Potassium #Table
Common causes of Acute Kidney Injury AKI - Differential Diagnosis
HEMODYNAMIC
 β€’ Cardiac failure: Impaired forward flow,
Kidney Injury AKI ... - Differential ... Impaired forward flow ... thromboembolism, renal ... #Diagnosis #nephrology
Acid Base Disorders - Blood Gas Interpretation

Steps for Blood Gas Interpretation: 
1. Acidemia or Alkalemia? 
2.
Acute or chronic ... Differentials? ... Compensation, Acute ... acetaminophen dosing ... Diagnosis #Summary #Nephrology
Hypokalemia Evaluation Algorithm

Before evaluating hypokalemia, life threatening complications such as arrhythmias and paralysis should be looked
differentiating kidney ... suggests extra-renal ... mEq/g suggests urinary ... - Metabolic Alkalosis ... - Metabolic acidosis
Hypophosphatemia - Differential Diagnosis Algorithm
Appropriately Low Kidney Phosphate Excretion:
 β€’ Decreased GI Absorption: Chronic Diarrhea, Antacids,
Appropriately Low ... Kidney Phosphate ... Refeeding Syndrome, Acute ... Respiratory Alkalosis ... β€’ N Vitamin D: Primary
Workup for Hypophosphatemia - Differential Diagnosis Framework
Rule out spurious hypophosphatemia: paraproteinemia, acute leukemia
Measure Urine Fractional Excretion
Hypophosphatemia - Differential ... paraproteinemia, acute ... resp. alkalosis ... FEPO4 β‰₯ 5% - Renal ... β€’ Normal or Low
Urinary Casts and Disease Associations
Hyaline - May be nonspecific; seen in normal individuals or during severe
individuals or during ... casts are seen in acute ... broad - Advanced kidney ... tubulointerstitial nephritis, renal ... #Casts #Differential