mjl1717
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I agree with guest this is more towards an osteoporotic state.
free Ca increase,PTH decrease,urine Ca increase.
*do not need bone resorption now
*In general PTH increases Ca and decreases PO4
**Calcition tones down serum Ca by inhibiting bone resorption
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Smell the coffee! "Is That an Osler move??"
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I ll try to explain.
If we remove the wt bearing stress on the bones they tend to resorb. So bed restriction will cause bone resorption and hypercalcemia.. which will suppress PTH (which is actually for control of Ca conc, not bone density).
PTH causes inc. reabs. of Ca from DCT. So dec. PTH will result in Ca loss in urine.
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| mjl1717
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Actions of PTH
increases bone resorption, which brings Ca and PO4 to ECF
inhibits PO4 reabsorbtion in proximal tubule,therefore increases phosphate excretion.As a result PO4 resorbed from bone is excreted in the urine,allowing serum Ca to increase
PTH increases Ca reabsorbtion in the distal tubule which also increases serum Ca
PTH increases intestinal CA absorption indirectly by stimulating the production of 1,25 DHCHOL
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Smell the coffee! "Is That an Osler move??"
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| meg
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thnx!
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We should remember PTH levels only increase when Ca is low (except for prim. hyperparathyroidism).
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| FH
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Thanks, will remember that.
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| star1
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IF THIS PT WAS ALSO ADVISED TO TAKE A Ca and Vit.D tablet , then what will be the answer in the above Q?
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