10.4.4 IOTA LR2 Worksheet
Note
IOTA LR2 Calculation is an option.
Note
IOTA LR2 Calculation is not available in Japan
The IOTA (International Ovarian Tumor Analysis) LR2 Worksheet contains an ovary
measurement tool for women with adnexal tumors that have been selected to undergo
surgery. The LR2 model is based on published literature and has been tested only on the
stated population. The literature states that the LR2 model can help to estimate the probability
of an adnexal mass of being malignant. The IOTA group has evaluated other ways including
an LR1 model in additional to the LR2 model.
Note
IOTA states that use outside of the intended population can overestimate risk. Users are
expected to study the literature and reach their own professional conclusions regarding the
clinical utility of the tool. The model cannot replace experience in ultrasonography and cannot
compensate for poor quality ultrasound equipment.
The IOTA mathematical logistic regression model, LR2 is stated in literature as described in
the Advanced Reference Manual
Note
For details see Advanced Reference Manual – Chapter IOTA.
GE Healthcare is passing on this IOTA LR2 worksheet for your convenience based on
published literature of one group, but makes no representation of its effectiveness in your
practice. This calculation is not to be used as the primary driver in diagnostic decision making
on the probability of malignancy. It is secondary information for a physician to use based on
recent literature.
Workflow
1.
Select IOTA LR2 Model on the Gynecology Worksheet menu.
2.
Patient name and ID are entered by the system.
3.
Fill in items 1 to 6. The Patient's age is entered by the system if available from the
Patient Information Dialog.
4.
The IOTA LR2 model result is displayed.
Note
A yellow caution symbol will be displayed.
The following message will be displayed on the monitor screen after clicking the yellow caution
symbol. You can select the language in which the message is displayed.
Caution
The IOTA LR2 model should not be used without an independent clinical evaluation and is not
intended to be a screening test or to determine whether a patient should proceed to surgery.
Incorrect use of the IOTA LR2 model carries the risk of unnecessary testing, surgery, and/or
delayed diagnosis.
Measurements and Calculations
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Voluson™ SWIFT / Voluson SWIFT+ Instructions For Use
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