2. The volume of Ms. Rose's plasma was 3 L before Raphael administered the IV. Assume that there was complete mixing of the administered water with her plasma but no mixing with her interstitial fluid. Calculate Ms. Rose's plasma osmolarity after the infusion mixed with her plasma but before any water entered her RBC. 3. Assume that Ms. Rose's RBC volume was 2 L before the IV was given. Calculate her plasma and RBC osmolarity after the infused water equilibrated between her plasma and her RBC. How much would her RBC volume change? (Assume there was no mixing with her interstitial fluid.) 4. The resident physician, knowing what Raphael had done, infused the patient with 1 L of a 600 mM (i.e. 600 mOsm/L) sucrose solution. Assume that this infusion equilibrated with Ms. Emily's plasma and RBC. Predict the effect of the infusion given by the resident. Explain. Parameter Ms. Rose's RBC osmolarity Ms. Rose's RBC volume Prediction
2. The volume of Ms. Rose's plasma was 3 L before Raphael administered the IV. Assume that there was complete mixing of the administered water with her plasma but no mixing with her interstitial fluid. Calculate Ms. Rose's plasma osmolarity after the infusion mixed with her plasma but before any water entered her RBC. 3. Assume that Ms. Rose's RBC volume was 2 L before the IV was given. Calculate her plasma and RBC osmolarity after the infused water equilibrated between her plasma and her RBC. How much would her RBC volume change? (Assume there was no mixing with her interstitial fluid.) 4. The resident physician, knowing what Raphael had done, infused the patient with 1 L of a 600 mM (i.e. 600 mOsm/L) sucrose solution. Assume that this infusion equilibrated with Ms. Emily's plasma and RBC. Predict the effect of the infusion given by the resident. Explain. Parameter Ms. Rose's RBC osmolarity Ms. Rose's RBC volume Prediction
Biomedical Instrumentation Systems
1st Edition
ISBN:9781133478294
Author:Chatterjee
Publisher:Chatterjee
Chapter19: Biomedical Laboratory Instrumentation
Section: Chapter Questions
Problem 10P
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Question
Medical Case #1: Dehydration
Raphael, in his third-year medical internship, was alone in the hospital emergency room (ER) one
night. It was unusually quiet in the ER, so the resident doctors were getting some much-needed
sleep. A patient, Ms. Rose, was brought in showing signs of serious dehydration. Raphael tried
to give her water but she vomited. Feeling that he must try something else and not wanting to
wake the residents, he administered 1 liter (L) of sterile distilled water intravenously (IV).
Assume for simplicity that red blood cells (RBC) contain only solutes to which the RBC membrane
is impermeable. The osmolarity of the RBC is 300 mOsm/L.
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