์ผํ์นผ๋ฅจ / ๊ธ๋ฃจ์ฝ์ฐ์นผ๋ฅจ
์นผ๋ฅจ์ ์๋ช ์ ์ง์ ํ์์ ์ธ ์ฃผ์ ์ธํฌ๋ด ์ ํด์ง์ ๋๋ค. ํนํ ์ฌ์ฅ, ๊ณจ๊ฒฉ๊ทผ, ํํ๊ทผ๊ณผ ๊ฐ์ ํฅ๋ถ์ฑ ์กฐ์ง์์ ์ธํฌ์ ์์ ๋ง ์ ์๋ฅผ ์ ์งํ๋ ๋ฐ ์ค์ํ ์ญํ ์ ํฉ๋๋ค. **์์ ์์ :** * **์ ์นผ๋ฅจํ์ฆ**(๋ฎ์ ์นผ๋ฅจ)์ ๋ง์ฑ ์ ์ฅ ์งํ(ํนํ ๊ณ ์์ด), ๊ณต๊ฒฉ์ ์ธ ์ด๋จ์ ์ฌ์ฉ, ๋น๋จ๋ณ์ฑ ์ผํค์ฐ์ฆ(DKA) ๋ฐ ์ฌ๊ฐํ ์์ฅ๊ด ์์ค์ ํํ ํฉ๋ณ์ฆ์ ๋๋ค. * **๊ธ๋ฃจ์ฝ์ฐ์นผ๋ฅจ**์ ์์ฅ๊ด ์๊ทน์ด ์ ๊ณ ๊ฐ๋ฒผ์ด ์์นผ๋ฆฌํ ํจ๊ณผ๋ฅผ ์ ๊ณตํ๋ฏ๋ก ์ผ๋ฐ์ ์ผ๋ก ๊ฒฝ๊ตฌ ๋ณด์ถฉ์ ๋ก ์ ํธ๋ฉ๋๋ค. * **์ผํ์นผ๋ฅจ(KCl)**์ ์ ๋งฅ ๋ด ๋ณด์ถฉ์ ํ์ค์ด์ง๋ง, ์น๋ช ์ ์ธ ๋ถ์ ๋งฅ์ ์๋ฐฉํ๊ธฐ ์ํด ํฌ์ฌ ์ ์ **๋ฐ๋์** ํฌ์ํด์ผ ํฉ๋๋ค. * ์ฐ์ผ๊ธฐ ๋ถ๊ท ํ(์ฐ์ฆ์ ์นผ๋ฅจ์ ์ธํฌ ๋ฐ์ผ๋ก ์ด๋์ํด)์ด ์๋ ๊ฒฝ์ฐ, ํ์ฒญ ์์น๊ฐ ์ ์์ผ๋ก ๋ณด์ด๋๋ผ๋ ์ ์ ์ ์นผ๋ฅจ ๊ณ ๊ฐ์ด ์ฌ๊ฐํ ์ ์์ต๋๋ค.
์์ฉ ๊ธฐ์ : Potassium is the principal intracellular cation in the body. It works primarily via the **Na+/K+ ATPase pump** to maintain the electrochemical gradient across cell membranes. * Maintains cellular tonicity and resting membrane potential โ essential for nerve impulse transmission. * Regulates smooth, skeletal, and cardiac muscle contraction. * Acts as a crucial cofactor in carbohydrate utilization and protein synthesis. * Essential for the maintenance of normal renal function.
๋๋ฌผ ์ข ๋ณ ์ฉ๋
- Treatment of chronic mild hypokalemia (3.0-3.5 mEq/L) ยท 0.5-1 mEq/kg mixed in food once or twice daily ยท PO ยท q12-24h
- Treatment of chronic mild hypokalemia (Tumil-K powder) ยท 1/4 teaspoonful (2 mEq) per 4.5 kg body weight in food twice daily; adjust as necessary ยท PO ยท q12h
- Moderate to severe (<3.0 mEq/L) or acute hypokalemia ยท Rate should not exceed 0.5 mEq/kg/hour. Under dire circumstances (serum K < 2.0 mEq/L), rate can be increased to 1.5 mEq/kg/hour along with close EKG monitoring. ยท IV ยท Continuous
- Subcutaneous fluid supplementation (<10 kg patients) ยท 150 mL SC every 12 hours of isotonic fluids containing 30-35 mEq/L KCl ยท SC ยท q12h
- Oral maintenance supplementation ยท 2-4 mEq/day ยท PO ยท Daily ยท Using potassium gluconate.
- Sliding scale IV supplementation based on Serum K+ ยท Serum K+ <2 mEq/L = 60 mEq/1000 mL IV fluid; Serum K+ 2-2.5 mEq/L = 40 mEq/1000 mL IV fluid; Serum K+ 2.5-3 mEq/L = 30 mEq/1000 mL IV fluid; Serum K+ 3-3.5 mEq/L = 20 mEq/1000 mL IV fluid. Infusion rates should generally not exceed 0.5 mEq/kg/hour. ยท IV ยท Continuous
- Hypokalemia in 'downer' cows ยท 80 grams sodium chloride and 20 grams potassium chloride in 10 liters of water via stomach tube. Provide a bucket containing similar solution for cow to drink and another containing fresh water. ยท PO ยท Once
- Hypokalemia maintenance/treatment ยท 50 grams PO daily; 1 mEq/kg/hour IV drip ยท PO/IV ยท Daily/Continuous
ํฌ์ฌ ๊ฒฝ๋ก
๊ธ๊ธฐ
- Hyperkalemia
- Renal failure or severe renal impairment
- Severe hemolytic reactions
- Untreated Addison's disease (hypoadrenocorticism)
- Acute dehydration
- GI motility impairment (for solid oral dosage forms)
์ด์๋ฐ์
- Hyperkalemia (muscle weakness, cardiac conduction disturbances)
- Gastrointestinal distress (vomiting, diarrhea) with oral therapy
- Vein irritation and phlebitis with IV therapy
์ฝ๋ฌผ ์ํธ์์ฉ
- ACE Inhibitors (e.g., enalapril) ยท Potassium retention may occur; increased risk for hyperkalemia.
- Digoxin ยท In patients with severe or complete heart block receiving digitalis therapy, it is often recommended not to use potassium salts.
- NSAIDs ยท Oral potassium given with non-steroidal anti-inflammatory agents may increase the risk of gastrointestinal adverse effects.
- Potassium-Sparing Diuretics (e.g., spironolactone) ยท Potassium retention may occur; increased risk for hyperkalemia.
๋ชจ๋ํฐ๋ง
- Serum potassium levels
- Other electrolytes (sodium, chloride, magnesium, calcium)
- Acid/base status
- Blood glucose
- ECG (especially during IV administration)
- CBC
- Urinalysis and renal function parameters
๊ณผ์ฉ๋
Fatal hyperkalemia may develop if potassium salts are administered too rapidly IV or if potassium renal excretory mechanisms are impaired. **Clinical Signs of Hyperkalemia:** * Muscular weakness * Gastrointestinal disturbances * Severe cardiac conduction disturbances (bradycardia, atrial standstill, ventricular fibrillation, asystole) **Treatment of Hyperkalemia:** * Immediate discontinuation of the potassium supplement. * Continuous ECG, acid/base, and electrolyte monitoring. * **Medical interventions:** Glucose/insulin infusions (drives K+ into cells), sodium bicarbonate (alkalinization drives K+ into cells), calcium therapy (cardioprotective, antagonizes K+ effects on the heart), and polystyrene sulfonate resin (binds K+ in the GI tract).
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