NREMT EMT 6: Anatomy, Physiology, and Pathophysiology - Urinary System, Kidney Function, Fluid Balance, Acid-Base

What This Is: Urinary System (Kidney Function, Fluid Balance, Acid-Base)

The urinary system is like a water treatment plant in your body. It filters waste and excess fluids from your blood, keeping you healthy. Imagine your kidneys as two tiny filters that remove bad stuff from your blood, like a coffee maker removing coffee grounds. If your kidneys fail, your body can't get rid of waste, leading to serious problems.

Key Steps / Core Facts:

• Kidney Function: Your kidneys remove waste and excess fluids from your blood. If they fail, you may need dialysis or a transplant. (Example: A 60-year-old man with diabetes develops kidney failure.)
• Fluid Balance: Your body needs the right amount of fluids to function. Too little or too much can be life-threatening. (Example: A 30-year-old athlete loses 10 pounds in one day due to dehydration.)
• Acid-Base Balance: Your body needs to maintain the right balance of acids and bases. Imbalances can lead to serious health issues. (Example: A 40-year-old woman with kidney disease develops acidosis.)
• Osmolality: The concentration of particles in your blood affects fluid balance. (Example: A 20-year-old athlete drinks too much water and develops hyponatremia.)
• Urine Output: Your kidneys produce urine to remove waste. Low urine output can indicate kidney problems. (Example: A 50-year-old man with kidney stones has low urine output.)
• Blood Urea Nitrogen (BUN): A waste product that builds up in your blood if your kidneys fail. (Example: A 60-year-old woman with kidney disease has a BUN level of 50 mg/dL.)
• Creatinine: A waste product that builds up in your blood if your kidneys fail. (Example: A 40-year-old man with kidney disease has a creatinine level of 2.5 mg/dL.)
• Electrolytes: Your body needs the right balance of electrolytes (like sodium and potassium) to function. Imbalances can lead to serious health issues. (Example: A 30-year-old athlete develops hyperkalemia due to a potassium supplement overdose.)
• Diuresis: The process of producing large amounts of urine. (Example: A 20-year-old athlete drinks too much water and develops diuresis.)
• Oliguria: Low urine output, often indicating kidney problems. (Example: A 50-year-old man with kidney stones has oliguria.)
• Anuria: No urine output, often indicating kidney failure. (Example: A 60-year-old woman with kidney disease develops anuria.)
• Acidosis: A condition where your body has too much acid. (Example: A 40-year-old woman with kidney disease develops acidosis.)
• Alkalosis: A condition where your body has too little acid. (Example: A 30-year-old athlete develops alkalosis due to excessive vomiting.)

What Laypeople Can Do:

• If someone is experiencing severe vomiting or diarrhea, offer to help them stay hydrated with clear liquids.
• If someone is experiencing severe abdominal pain or difficulty urinating, encourage them to seek medical attention.
• If someone is experiencing confusion or disorientation, try to keep them calm and comfortable until help arrives.
• If someone is experiencing severe bleeding, apply pressure to the wound with a clean cloth or gauze.
• If someone is experiencing difficulty breathing, try to keep them upright and comfortable until help arrives.

Common Mistakes:

• Mistake: Thinking that a person with a low urine output is just dehydrated.
• Fix: Check for underlying kidney problems or other medical conditions that may be causing the low urine output.
• Mistake: Assuming that someone with acidosis is just "sick" and will recover on their own.
• Fix: Recognize the severity of acidosis and encourage the person to seek medical attention immediately.
• Mistake: Thinking that a person with anuria is just constipated.
• Fix: Recognize the severity of anuria and encourage the person to seek medical attention immediately.

Quick Practice Scenarios:

• A 40-year-old woman with kidney disease develops acidosis. What should you do first?
• Answer: Encourage her to seek medical attention immediately.

• Reason: Acidosis can lead to serious health issues if left untreated.

• A 20-year-old athlete develops diuresis due to excessive water intake. What should you do first?

• Answer: Encourage him to drink electrolyte-rich fluids to replace lost electrolytes.

• Reason: Diuresis can lead to electrolyte imbalances if not managed properly.

• A 50-year-old man with kidney stones has oliguria. What should you do first?

• Answer: Encourage him to seek medical attention immediately.
• Reason: Oliguria can indicate kidney problems that require medical attention.

Last-Minute Exam Cram:

• Normal urine output is 400-600 mL/hour.
• Kidney failure can lead to anuria.
• Acidosis can lead to serious health issues if left untreated.
• Alkalosis can lead to serious health issues if left untreated.
• Diuresis can lead to electrolyte imbalances if not managed properly.
• Oliguria can indicate kidney problems that require medical attention.
• Anuria is a medical emergency that requires immediate attention.
• Electrolyte imbalances can lead to serious health issues if not managed properly.
• Kidney disease can lead to acidosis or alkalosis.
• Fluid balance is crucial for maintaining proper kidney function.
• Osmolality affects fluid balance and kidney function.
• Creatinine levels can indicate kidney function.
• BUN levels can indicate kidney function.
• Electrolyte imbalances can lead to serious health issues if not managed properly.