Library/Bone/Calcium/10.4

Calcium of 10.4 mg/dLWhat it means, and what usually happens next

10.4mg/dL Calcium
Mildly high
8.510.312

A total calcium of 10.4 mg/dL is above the usual 8.5 to 10.2 mg/dL.

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Calcium10.4mg/dL
In mmol/L2.59
The usual rangeabout 8.5 to 10.2 mg/dL (labs vary by a few tenths)

What usually happens next

It's usually repeated with albumin (a corrected calcium) and a PTH. In an otherwise well person, an overactive parathyroid gland is the most common reason.

Calcium and vitamin D supplements, thiazide diuretics and dehydration can push it up too.

What a high calcium usually means, and its common causes

When a calcium can read wrong

Most calcium in blood rides on albumin, so a low albumin makes total calcium read low and dehydration makes it read high. A long tourniquet can nudge it up. A corrected or ionised calcium settles it.

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Questions

Is a calcium of 10.4 mg/dL normal?

A total calcium of 10.4 mg/dL is above the usual 8.5 to 10.2 mg/dL. The usual range is about 8.5 to 10.2 mg/dL (labs vary by a few tenths).

What is 10.4 mg/dL in mmol/L?

2.59 mmol/L. Labs in different countries print Calcium in different units; the meaning is the same.

Worked out by LifeFrom from the BMJ's hypercalcaemia review and the usual lab range, and not yet reviewed by a clinician. For your own understanding: only a lab test, read by your clinician, diagnoses anything.