🧠⚡️ ICU Electrolyte Essentials: Magnesium 🟣 | Calcium 🔵 | Phosphate 🟢 ⚡️🧠
Link of Zeitounat Al-Ri'aya pdf 📕👇🏻
https://gynaobs.gumroad.com/l/jtnkqi
📌 Electrolyte disturbances are among the most common abnormalities in critically ill patients and can significantly impact the ❤️ heart, 🫁 lungs, 🧠 nervous system, and 💪 muscles.
🟣 MAGNESIUM (Mg²⁺)
⬇️ Hypomagnesemia 🔹 Common causes: PPIs 💊, loop diuretics 💧, alcoholism 🍺, diarrhea 🚽, amphotericin & cisplatin 💉 🔹 Clinical effects: ⚠️ Arrhythmias ⚠️ Torsades de Pointes ❤️ ⚠️ Seizures 🧠 ⚠️ Muscle weakness 💪 ⚠️ Refractory hypokalemia 🥔⬇️
💡 Remember: ⬇️ Mg²⁺ ➡️ ⬇️ K⁺ 👉 Correct magnesium first!
⬆️ Hypermagnesemia 🔹 Usually due to renal failure 🩺 + excess magnesium intake 💊 🔹 Symptoms: 😵 Nausea 🔥 Flushing 🦵 Loss of reflexes 🫁 Respiratory depression ❤️ Cardiac arrest (severe cases)
🔵 CALCIUM (Ca²⁺)
⬇️ Hypocalcemia 🔹 Causes: 🦴 Vitamin D deficiency 🧬 Hypoparathyroidism 🩸 Massive transfusion 🔥 Pancreatitis 💪 Rhabdomyolysis
🔹 Signs: 👋 Chvostek sign ✋ Trousseau sign ⚡ Tetany 🧠 Seizures ❤️ QT prolongation
📌 Always assess ionized calcium in critically ill patients.
⬆️ Hypercalcemia 🔹 Common causes: 🎗️ Malignancy 🦴 Hyperparathyroidism 💊 Vitamin D toxicity 💊 Thiazide diuretics
🔹 Classic presentation: 🦴 Bones = Bone pain 🪨 Stones = Kidney stones 🤢 Groans = GI symptoms 😵 Moans = Confusion
💧 Initial treatment: 🚰 IV fluids 💊 Bisphosphonates 💉 Calcitonin 🔍 Treat the underlying cause
🟢 PHOSPHATE (PO₄³⁻)
⬇️ Hypophosphatemia 🔹 Causes: 🍽️ Refeeding syndrome 💉 DKA treatment 🥗 Malnutrition 🌬️ Respiratory alkalosis
⚠️ Severe hypophosphatemia can cause: 🫁 Respiratory failure 💪 Muscle weakness ❤️ Cardiac dysfunction 🩸 Hemolysis 🧬 Cellular energy depletion
⬆️ Hyperphosphatemia 🔹 Common causes: 🩺 Chronic kidney disease 💥 Tumor lysis syndrome 💊 Excess phosphate intake
🔹 Complications: ⬇️ Calcium levels 🦴 Soft tissue calcification 🩸 Vascular calcification 😖 Pruritus
💡 Electrolyte Relationships: ⚖️ Low Ca²⁺ often = High PO₄³⁻ ⚖️ High Ca²⁺ often = Low PO₄³⁻ ⚖️ Electrolytes should always be interpreted together, not in isolation.
🚨 ICU Pearls: ✅ Check magnesium daily ✅ Always correlate numbers with symptoms ✅ Correct underlying causes ✅ Monitor ECG changes ❤️📈 ✅ Treat the patient, not just the laboratory value 🩺
📚 Sources 🔹 Marino’s The ICU Book, 5th Edition, Chapters 35–38 🔹 American Heart Association (AHA) Scientific Statements 🔹 NICE Clinical Knowledge Summaries (CKS): Electrolyte Disorders — https://cks.nice.org.uk 🔹 British National Formulary (BNF) — https://bnf.nice.org.uk 🔹 UpToDate: Disorders of Magnesium, Calcium and Phosphate Homeostasis 🔹 KDIGO Clinical Practice Guidelines for CKD-MBD — https://kdigo.org
#ICUMedicine #CriticalCare #Electrolytes #MedEd #FOAMed
