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Calculator Limitations
What is Inter Greater Trochanter?
What is Pelvic Depth?
Valid Values

Calculator limitations:

The calculator was developed for, and has been tested with an accuracy of +-7mm, on patients with characteristics that fall within certain boundaries (see Valid Values).

Data that is entered that is a small amount beyond what is tested will trigger a warning message, which is simply to alert users that the accuracy of the prediction is unknown. To Submit and retrieve a calculation anyway, simply press the Submit button a second time.

For data that is significantly beyond what is tested (or incorrect data) an error will be triggered, preventing a calculation from being obtained.

Some specifics include: The intended age range is for patients over 21 and under 100 years of age. Patients between 18 and 20 (inclusive) can still have calculations made with a warning.

What is Inter Greater Trochanter?

The inter greater trochanter measurement is the distance between the lateral most projection of the left and right Greater Trochanters, as measured in the coronal plane

What is Pelvic Depth?

The pelvic depth measurement is the distance between two parallel reference lines defined by:
      1. The most anterior projections of the right and left pubic tubercles and
      2. The most posterior projection of the Posterior Superior Iliac Spines.

Distance recorded in the sagittal plane.

What Are The Valid Values For The Calculator?

To assist the user in making valid calculations, user inputs are checked against anthropmetric data.

Male boundaries for accepatble results. (mm / kg)
Input Minimum Recommended Min Recommended Max Maximum
Age 18 21 100 140
Mass 10 51 103 250
Pelvic Depth 80 129 165 330
Inter GT 150 266 334 668
Female boundaries for accepatble results. (mm / kg)
Input Minimum Recommended Min Recommended Max Maximum
Age 18 21 100 140
Mass 10 43 87 250
Pelvic Depth 80 126 166 330
Inter GT 150 262 322 668