RNSG 1443 Exam 1 -Advanced Assessment of Fluid & Electrolyte
Homeostasis, Intravenous Therapy, Osmoregulation, Electrolyte Imbalances,
Acid-Base Disorders, Renal & Cardiovascular Function, Hormonal Regulation,
Cellular Diffusion, Membrane Transport, Osmolality Dynamics, Hypernatremia,
Hyponatremia, Hyperkalemia, Hypokalemia, Hypercalcemia, Hypocalcemia,
Hypermagnesemia, Hypomagnesemia, Hyperphosphatemia,
Hypophosphatemia, Volume Status, Hypovolemia, Hypervolemia, Third-Spacing,
Capillary Hydrostatic Pressure, Plasma Oncotic Pressure, Sodium-Potassium
Pump, Active Transport, Osmosis, Diffusion, SIADH, RAAS Regulation, and
Clinical Nursing Management Exam Questions Verified and Provided with
Complete A+ Graded Rationales Latest Updated 2026
isotonic solution
A solution with the same concentration of water and solutes as inside a cell, resulting in the cell
retaining its normal shape because there is no net movement of water.
has an osmolality similar to plasma. Because of this similarity, giving an isotonic solution expands only
ECF, and the fluid does not move into cells. This makes isotonic solutions the ideal fluid replacement for
patients with ECF volume deficits. Examples of isotonic solutions include 0.9% NaCl and lactated Ringer's
solution.
Isotonic saline (0.9% NaCl), or normal saline, has a sodium concentration (154 mEq/L) slightly higher
than that of plasma (135 to 145 mEq/L) and a chloride concentration (154 mEq/L) significantly higher
than the plasma chloride level (96 to 106 mEq/L). Therefore, giving too much isotonic saline has the
potential to increase sodium and chloride levels. Isotonic saline is used when a patient has had both
fluid and sodium losses (e.g., diarrhea, vomiting).
Lactated Ringer's solution contains sodium, potassium, chloride, calcium, and lactate (the precursor of
bicarbonate) in about the same concentrations as ECF. This makes it the ideal fluid in certain situations,
such as surgery, burns, or GI fluid losses. Patients with liver problems, hyperkalemia, and severe
hypovolemia should not receive lactated Ringer's because they have a decreased ability to convert the
lactate to bicarbonate.
isotonic solutions uses & cautions
uses:
,-hypotension
-blood transfusions
-hemorrhaging
-DKA (type 1 diabetes disorder)
-HHNS (type 2 diabetes disorder)
cautions:
- too much isotonic = fluid volume overload
- Monitor: Blood Pressure
Key manifestations: HTN crisis (BP over 180/ systolic) risk
for CVA stroke
what are the 2 types of IV isotonic solutions?
Examples of isotonic solutions include 0.9% NaCl and lactated Ringer’s solution.
An isotonic solution has an osmolality similar to plasma. Because of this similarity, giving an isotonic
solution expands only ECF, and the fluid does not move into cells. This makes isotonic solutions the ideal
fluid replacement for patients with ECF volume deficits.
, -Isotonic saline (0.9% NaCl), or normal saline, has a sodium concentration (154 mEq/L) slightly higher
than that of plasma (135 to 145 mEq/L) and a chloride concentration (154 mEq/L) significantly higher
than the plasma chloride level (96 to 106 mEq/L). Therefore, giving too much isotonic saline has the
potential to increase sodium and chloride levels. Isotonic saline is used when a patient has had both
fluid and sodium losses (e.g., diarrhea, vomiting).
-Lactated Ringer’s solution contains sodium, potassium, chloride, calcium, and lactate (the precursor of
bicarbonate) in about the same concentrations as ECF. This makes it the ideal fluid in certain situations,
such as surgery, burns, or GI fluid losses. Patients with liver problems, hyperkalemia, and severe
hypovolemia should not receive lactated Ringer’s because they have a decreased ability to convert the
lactate to bicarbonate.
hypertonic solution
Solute concentration is greater than that inside the cell; cell loses water.
has a higher osmolality than plasma. The higher osmotic pressure draws water out of the cells into ECF.
It is useful in the treatment of hyponatremia and trauma patients with a head injury. Those receiving
hypertonic solutions need frequent monitoring of BP, lung sounds, and serum sodium levels because of
the risk for intravascular fluid volume excess.
Although concentrated dextrose and water solutions (10% dextrose or greater) are hypertonic solutions,
once the dextrose is metabolized, the net result is the administration of water. This free water
ultimately expands ECF and ICF. The primary use of these solutions is providing calories as part of PN
(see Chapter 44). You may give solutions containing 10% dextrose or less through a peripheral line. You
must use a central line to give solutions with dextrose concentrations greater than 10%.
what are the 5 types of IV hypertonic solutions?
Memory trick- very little #s in front of the solutions (3%, 5%, 10%) = very little fluid in the cell.
- 3% NaCl (3% NS)
Homeostasis, Intravenous Therapy, Osmoregulation, Electrolyte Imbalances,
Acid-Base Disorders, Renal & Cardiovascular Function, Hormonal Regulation,
Cellular Diffusion, Membrane Transport, Osmolality Dynamics, Hypernatremia,
Hyponatremia, Hyperkalemia, Hypokalemia, Hypercalcemia, Hypocalcemia,
Hypermagnesemia, Hypomagnesemia, Hyperphosphatemia,
Hypophosphatemia, Volume Status, Hypovolemia, Hypervolemia, Third-Spacing,
Capillary Hydrostatic Pressure, Plasma Oncotic Pressure, Sodium-Potassium
Pump, Active Transport, Osmosis, Diffusion, SIADH, RAAS Regulation, and
Clinical Nursing Management Exam Questions Verified and Provided with
Complete A+ Graded Rationales Latest Updated 2026
isotonic solution
A solution with the same concentration of water and solutes as inside a cell, resulting in the cell
retaining its normal shape because there is no net movement of water.
has an osmolality similar to plasma. Because of this similarity, giving an isotonic solution expands only
ECF, and the fluid does not move into cells. This makes isotonic solutions the ideal fluid replacement for
patients with ECF volume deficits. Examples of isotonic solutions include 0.9% NaCl and lactated Ringer's
solution.
Isotonic saline (0.9% NaCl), or normal saline, has a sodium concentration (154 mEq/L) slightly higher
than that of plasma (135 to 145 mEq/L) and a chloride concentration (154 mEq/L) significantly higher
than the plasma chloride level (96 to 106 mEq/L). Therefore, giving too much isotonic saline has the
potential to increase sodium and chloride levels. Isotonic saline is used when a patient has had both
fluid and sodium losses (e.g., diarrhea, vomiting).
Lactated Ringer's solution contains sodium, potassium, chloride, calcium, and lactate (the precursor of
bicarbonate) in about the same concentrations as ECF. This makes it the ideal fluid in certain situations,
such as surgery, burns, or GI fluid losses. Patients with liver problems, hyperkalemia, and severe
hypovolemia should not receive lactated Ringer's because they have a decreased ability to convert the
lactate to bicarbonate.
isotonic solutions uses & cautions
uses:
,-hypotension
-blood transfusions
-hemorrhaging
-DKA (type 1 diabetes disorder)
-HHNS (type 2 diabetes disorder)
cautions:
- too much isotonic = fluid volume overload
- Monitor: Blood Pressure
Key manifestations: HTN crisis (BP over 180/ systolic) risk
for CVA stroke
what are the 2 types of IV isotonic solutions?
Examples of isotonic solutions include 0.9% NaCl and lactated Ringer’s solution.
An isotonic solution has an osmolality similar to plasma. Because of this similarity, giving an isotonic
solution expands only ECF, and the fluid does not move into cells. This makes isotonic solutions the ideal
fluid replacement for patients with ECF volume deficits.
, -Isotonic saline (0.9% NaCl), or normal saline, has a sodium concentration (154 mEq/L) slightly higher
than that of plasma (135 to 145 mEq/L) and a chloride concentration (154 mEq/L) significantly higher
than the plasma chloride level (96 to 106 mEq/L). Therefore, giving too much isotonic saline has the
potential to increase sodium and chloride levels. Isotonic saline is used when a patient has had both
fluid and sodium losses (e.g., diarrhea, vomiting).
-Lactated Ringer’s solution contains sodium, potassium, chloride, calcium, and lactate (the precursor of
bicarbonate) in about the same concentrations as ECF. This makes it the ideal fluid in certain situations,
such as surgery, burns, or GI fluid losses. Patients with liver problems, hyperkalemia, and severe
hypovolemia should not receive lactated Ringer’s because they have a decreased ability to convert the
lactate to bicarbonate.
hypertonic solution
Solute concentration is greater than that inside the cell; cell loses water.
has a higher osmolality than plasma. The higher osmotic pressure draws water out of the cells into ECF.
It is useful in the treatment of hyponatremia and trauma patients with a head injury. Those receiving
hypertonic solutions need frequent monitoring of BP, lung sounds, and serum sodium levels because of
the risk for intravascular fluid volume excess.
Although concentrated dextrose and water solutions (10% dextrose or greater) are hypertonic solutions,
once the dextrose is metabolized, the net result is the administration of water. This free water
ultimately expands ECF and ICF. The primary use of these solutions is providing calories as part of PN
(see Chapter 44). You may give solutions containing 10% dextrose or less through a peripheral line. You
must use a central line to give solutions with dextrose concentrations greater than 10%.
what are the 5 types of IV hypertonic solutions?
Memory trick- very little #s in front of the solutions (3%, 5%, 10%) = very little fluid in the cell.
- 3% NaCl (3% NS)
