Fluid and Electrolytes

Microdrip tubing has a drop factor of 60 gtts/ml. To find gtts/min, multiply the hourly rate (1000 ml / 12 hr = 83.33 ml/hr) by the drop factor (60) and divide by 60 minutes, which equals 83.33 gtts/min.

The formula is (Volume in ml * Drop factor) / Time in minutes. Here, (50 ml * 20 gtts/ml) / 60 minutes = 1000 / 60 = 16.66, which rounds to 17 gtts/min.

To find the flow rate in ml/hr, divide the total volume by the total time. 2000 ml / 20 hours = 100 ml/hr.

To find the flow rate in ml/hr, divide the total volume by the total time. 1000 ml / 8 hours = 125 ml/hr.

The concentration is 30,000 units / 1000 ml = 30 units/ml. To deliver 5,000 units/hr, divide the desired dose by the concentration: 5000 / 30 = 166.67 ml/hr.

Using the formula (Desired / Have) * Quantity: (2500 units / 25000 units) * 5 ml = 0.1 * 5 = 0.5 ml.

The order is for 50 meq, and the supply is 50 meq in 100 ml. Therefore, the entire 100 ml bag contains the ordered dose.

Using the formula (Desired / Have) * Quantity: (2500 units / 10000 units) * 1 ml = 0.25 ml.

Using the formula (Desired / Have) * Quantity: (50 mg / 250 mg) * 5 ml = 0.2 * 5 = 1 ml.

The lungs are highly efficient at removing volatile acids like carbonic acid; they can eliminate the equivalent of approximately 30 liters of carbonic acid per day through the expiration of CO2.

A pH of 7 is neutral. In a neutral solution, the concentration of hydrogen ions (H+) is exactly equal to the concentration of hydroxide ions (OH-).

Carbonic acid (H2CO3) is a volatile acid. An excess of H2CO3 in the blood, typically caused by hypoventilation, leads to respiratory acidosis.

Aldosterone is a mineralocorticoid that acts on the distal tubules of the kidney to promote the reabsorption of sodium ions, which in turn leads to water retention.

ADH, aldosterone, and ANH are all critical hormones in fluid and electrolyte regulation. ACTH (adrenocorticotropic hormone) regulates the adrenal cortex but is not a primary regulator of fluid balance.

Fluid output occurs through the kidneys (urine), skin (sweat), GI tract (feces), and lungs (water vapor in breath).

A pH above 7 is alkaline (basic). In alkaline solutions, the concentration of OH- ions is greater than the concentration of H+ ions.

Stomach acid (gastric juice) contains hydrochloric acid and has a very low pH, typically between 1.5 and 3.5, making it significantly more acidic than blood or urine.

Adipose tissue (fat) is hydrophobic and contains very little water compared to muscle, bone, or nervous tissue.

Vomiting results in the loss of gastric hydrochloric acid. This loss of acid leads to an increase in blood pH, resulting in metabolic alkalosis.

The bicarbonate buffer system maintains a normal arterial blood pH of 7.4 by keeping a ratio of 20 parts bicarbonate to 1 part carbonic acid.

Hypokalemia (low potassium) significantly affects the electrical conduction system of the heart, putting patients at high risk for arrhythmias and other cardiac complications.

Osmosis is the movement of water across a semipermeable membrane from an area of lower solute concentration to an area of higher solute concentration. Diuretics like Lasix change solute concentrations to pull water into the intravascular space.

Oxygen moves from the alveoli into the blood via simple diffusion, which is a type of passive transport that does not require energy.

A urine output of at least 30 ml per hour is generally considered the minimum threshold for adequate kidney perfusion and function in adults. Values below this may indicate dehydration or renal impairment.

Microdrip tubing is designed to deliver 60 drops per milliliter (gtt/mL). This is used for precise fluid administration, especially in pediatric or critical care settings.