The RBC osmolarity of a patient is 300 mOsm/L and is given 1L of distilled water and starts with 3L of plasma.
What is the plasma osmolarity after infusion mixes with plasma but before water enters her RBC?
Once infused water equilibrated between plasma nad RBA what is her plasma and RBC osmolarity?
How much would her RBC volume change?
1.plasma osmolarity
distilled waters quantity of salutes is 0 and the patients quantity would be 900 at 3L and 300osm/l. making the pre- equilibrium values of plasma: volume-4 Quantity:900 Concentration(mosm/l):225 since concentraion=Quantity/volume.
To determine the plasma osmolarity after the infusion mixes with plasma but before water enters her RBCs, we need to consider the initial plasma osmolarity and the volume change due to the infusion.
1) Plasma osmolarity after infusion but before water enters RBCs:
The initial plasma osmolarity is 300 mOsm/L. Since the patient is infused with 1 liter of distilled water, we need to calculate the resulting change in volume. The total volume of plasma after the infusion would be 3 liters + 1 liter = 4 liters.
So, the plasma osmolarity after the infusion mixes with plasma but before water enters her RBCs would still be 300 mOsm/L, as no solutes were added or removed.
2) Plasma and RBC osmolarity after water equilibrates between plasma and RBCs:
When water equilibrates between plasma and RBCs, it will move from an area of low osmolarity (plasma) to an area of high osmolarity (RBCs). This will cause an increase in the osmolarity of both the plasma and the RBCs.
Since both the plasma and RBCs were initially at 300 mOsm/L, the osmolarity after equilibration will depend on the final volume of plasma and RBCs.
To calculate the final osmolarity, we need to know the volume change of the RBCs. Without that information, we cannot determine the exact osmolarity after equilibration.
3) RBC volume change:
To determine the change in RBC volume, we need to know the rate at which water enters the RBCs and their capacity to expand. The RBC volume can change based on various factors such as cell membrane permeability, tonicity of the solution, and the concentration gradients.
Without this information, it is not possible to determine the exact change in RBC volume.