Capintec CAPTUS 3000, Owner'S Manual, Page: 100 / 338

CAPINTEC, INC. CAPTUS
®
3000
method and the Decay Correct method. Most facilities find that Decay Correct
Administered Dose is the most convenient and cost effective method.
2. Measure Same Reference Dose Before Each Uptake
In this method, two capsules are used – one is used as a standard and the other is
administered to the patient.
•
Administer the dose to the patient.
•
Each time the uptake is performed, measure the standard first and then the
patient. The uptake will be calculated from this standard capsule and patient
measurement.
Dose Administration
There are five modes of dose administration that can be used in a protocol:
MODES
NUMBER
OF
DOSES
FORM
OF
DOSE
DESCRIPTION
Dose
Measured is
Dose
Administered
Single
Capsule
or Liquid
Measure the dose administered. These
measured counts are used directly for uptake
calculations.
Measure
Each Dose
and Add
Activity
Multiple
Capsule
or Liquid
Measure each of the capsules individually. The
software adds the activities together to get the
activity for total dose administered.
Note: When entering Dosage Information, the
activity for each capsule is added together and
entered in the “Total Activity of all capsules”
input box. Also, each capsule must have the
same calibration date and time.
Measure One
Capsule and
Multiply by
Number
Administered
Multiple Capsule
Measure only one capsule. The software then
multiplies that count rate by the number of
capsules administered to the patient (entered
when the patient is added to the database).
Measure
Liquid and
Multiply by
Factor
Multiple Liquid
Measure the activity for a fraction of the liquid
dose to be administered. The software then
multiplies that count rate by appropriate factor
(entered when the patient is added to the
database) to calculate the total activity for the
entire dose given.
Measure
Liquid and
Subtract
Residual
Single Liquid
Measure background and liquid. Then dose is
administered. Residual is then measured. Net
residual is decayed back to time of dose
measurement and subtracted from dose counts
minus background to obtain net dose counts
7-4 THYROID UPTAKE November 13