Fluid Therapy Flashcards
What are the five routes for fluid therapy administration?
Oral, subcutaneous, intravenous, intraperitoneal and intraosseous.
What does oral fluid therapy administration mean?
Through the mouth.
What does subcutaneous fluid therapy administration mean?
Under the skin.
What does intravenous fluid therapy administration mean?
Through the veins.
What does intraperitoneal fluid therapy administration mean?
Through the abdominal cavity, not into any abdominal organs or vessels.
What does intraosseous fluid therapy administration mean?
Through the bone.
What does dehydration mean?
The loss of fluid from all over the body or loss of fluid in all body fluid compartments. True dehydration is only water loss, no electrolytes.
What is does intra mean?
Inside
What is does inter mean?
Between
What is does extra mean?
Outside
What is does vas(o) mean?
Vessels
What is does intravascular mean?
Inside the vascular system
What is does extravascular mean?
Everything outside the vascular system
What is does intracellular mean?
Fluid inside the cells
What is does extracellular mean?
Fluid outside cells
What is does interstitial mean?
Fluid outside cells and outside vessels
What is does transcellular mean?
Fluid elsewhere (usually lubricant fluid)
How much of our body weight is made up of fluid?
60%. 66% of that is intracellular fluid and 33% of that fluid is extracellular (25% interstitual, 7% intravascular, <1% transcellular - CSF, joint, serous, eye).
What are the three major electrolytes in body fluid?
Potassium, sodium and chloride.
What fluid is potassium in?
It is the main cation in intracellular fluid.
What fluid is sodium in?
It is the main cation in extracellular fluid.
What are the three parts of extracellular fluid?
Interstitial, transcellular, intravascular.
What is a solute?
A substance being disolved (e.g salt)
What is a solvent?
The substance doing the disolving (e.g water)
What is a solution?
Solute + solvent dissolved.
What does permeable mean?
It allows things to pass through.
What is a semi permeable membrane?
A barrier that allows some things to pass through.
What is diffusion?
Spontaneous movement of substances
moving from a solution with high solute
concentration to a solution with low solute
concentration to balance the solutes on each
side. It stops when equilibrium is reached.
What is osmosis?
The solvent (water) moves from a solution
with low solute concentration to a solution
with high solute concentration, when
separated by a semi permeable membrane, to
balance concentration of solution.
What is important to remember about salt?
Salt sucks!
What is osmotic pressure?
It is pressure that stops water from doing osmosis. It stops osmosis from continually happening and it reaching a perfect balance. It can stop natural osmosis, but not artificial osmosis. The pressure needed to stop more water entering a region, osmotic pressure stops our veins leaking into the extracellular region.
What is sodium also known as?
Salt.
What electrolytes can the body control and not control levels of?
The body can control sodium levels in the body through things like the kidney filtration and absorption. However, the body cannot control its levels of potassium.
What does hypo mean?
Low
What does hyper mean?
High
What does vol mean?
Volume
What does haem mean?
Blood
What is hypovolaemia?
Low circulating blood volume (e.g shock, blood loss)
What is hypervolaemia?
Increased circulating blood volume (e.g overdose of fluid therapy)
What is hypotension?
Low blood pressure within the arteries
What is hypertension?
High blood pressure within the arteries
What is the fluid classification hypotonic made of?
Low sodium concentration. Lower number of particles in a solution compared to another solution , so exerts a lower osmotic pressure than body fluid.
What is the fluid classification isotonic made of?
Similar sodium concerntration to body. Same number of particles in both solutions, which means it is an equal osmotic pressure to body fluids. Has 0.9% sodium.
What is the fluid classification hypertonic made of?
High sodium concerntration. Higher number of particles in a solution compared to another solution, so exerts a higher osmotic pressure than bodt fluid. Has 7.2% sodium.
What is odema?
Tissue swelling
What causes hypervolaemia?
Giving too much fluid artificially.
What causes hypovolaemia?
Not having enough fluid. Can be from haemorrhage, severe dehydration, third space fluid loss (medial condition causing fluid leaks), burns, vomiting and diarrhoea.
What causes dehydration?
Not enough fluid in all fluid compartments.
What is an isotonic solution used for?
To replenish cells and tissues, hydrating the patient at a slow rate.
What is an hypertonic solution used for?
To rapidly expand the circulating blood volume by forcing fluids from the body into the intravascular system (from high salt concentration). It draws fluid from cells into interstitial space and then
some into intravascular space, can be used for reducing intracranial pressures, increasing circulation volume rapidly (must follow up with replacement crystalloid fluid to replace fluid in cells).
What is an hypotonic solution used for?
For true dehydration to replenish water, but cannot be given in large volumes. It’s used for high sodium levels in the body. Using it is very rare.
What happens to red blood cells in a hypertonic solution?
Due to excess salt, the fluids get sucked out of the red blood cells and caused them to become dehydrated.