2 year post-op bone density scan results
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My program recommends an annual bone scan, because it's the only way to find out if your body is cannibalizing your bones for Calcium in your blood stream. Your calcium must be extremely low to show in a blood test, because your body will just leach it from your bones to make up for what you are not getting.
I missed getting this done the first year somehow, so last month, I got my first bone density scan post-op. It's also my first one post-menopause, so not sure how much change is due to that and how much can be blamed on WLS. Last scan was in 2005. I am already walking 4 days a week, so plenty of weight bearing exercise. And I am taking the amount of Vitamin D and Calcium recommended by the Kaiser Fremont Bariatric program, which is 4000iu of Vitamin D per day (800 from 2 Multivitamins + 1500iu from calcium plus D + 2000iu vitamin D tablet) and 1500 mg a day total of calcium citrate. I was taking the calcium twice per day (3 tablets each time), but I am going to switch to taking it three times per day (2 tablets each time). So we will see what next year brings.
Here's the scoop on the scan:
Dual energy X-ray absorptiometry was performed to obtain bone mineral density (BMD) measurements using the Hologic Discovery bone densitometry unit. For each BMD measurement, Z and T scores are calculated. Z score represents the number of standard deviations of the patient's BMD from expected age matched values. T score represents the number of standard deviations of the patient's BMD from the average peak BMD value at age 30. A FRAX score has also been calculated using the LEFT FEMORAL NECK data.
OSTEOPENIA is defined as a T score from -1.0 to -2.4 representing an INCREASED fracture risk.
OSTEOPOROSIS is defined as a T score more negative than -2.4 and represents a HIGH fracture risk.
T score: Fracture risk comparison to gender and ethnicity matched 30-year-old.
0 = Average risk
-1 = 2 times the risk
-2 = 4 times the risk
-3 = 8 times the risk
LUMBAR SPINE:
BMD = 0.843 g/cm2 g/cm2
T score = -1.9
Z score = -0.7
LEFT HIP TOTAL:
BMD = 0.855 g/cm2 g/cm2
T score = -0.7
Z score = 0
LEFT FEMORAL NECK
BMD = 0.657 g/cm2 g/cm2
T score = -1.7
Z score = -0.6
** IMPRESSION **:
1. Bone mineral density in the LUMBAR SPINE is in the Osteopenic range. Compared to the prior study, there is significant change.The bone mineral density has decreased by -15.0 %.
2. Bone mineral density in the LEFT HIP is in the Normal range. Compared to the prior study, there is significant change. The bone mineral density has decreased by -23.3 %.
3. Based on FRAX, the 10 year probability of hip fracture is 1.0 %.
4. Based on FRAX, the 10 year probability of major osteoporotic fracture is 9.2 %.