Presentation on theme: "Gonstead Pelvic Analysis"— Presentation transcript:
1 Gonstead Pelvic Analysis Click to label each segmentWould like have prompts (ex. “click on L1, click on L2”)L4L5
2 Gonstead Pelvic Analysis Click highest point on right femur head (have computer place dot there)Click on the highest point of the left femur head (place dot)Draw line connecting dots – “femoral head line”L4L5..
3 Gonstead Pelvic Analysis Click the highest point on right iliac crest (have computer place dot there)Click the lowest point on right ischial tuberosity (have computer place dot there)Click the highest point on left iliac crest (have computer place dot there)Click the lowest point on left ischial tuberosity (have computer place dot there)Would like to be able to click and drag the dots to adjust their position and/or select the dot and use the arrow keys to “nudge” it into the desired positionL4..L5....
4 Gonstead Pelvic Analysis All lines “flying in” are constructed parallel to the femoral head line.L4..L5....
5 Gonstead Pelvic Analysis Need to measure distance between the iliac crest line and ischial tuberosity line 90 degrees/ perpendicular to the femoral head line, not from point to point, and not true vertical.Complete for left and right sideMeasurements ( must be mm) need to be displayed on screen (if possible just caudal to the femur head dots)Do not need to display these vertical measurement lines(having the computer automatically compute the measurement would be a plus)L4..L5..163168..
6 Gonstead Pelvic Analysis Place dot on S2 tubercle (or S1if preferred/ visualized).Place a dot in the center of the pubic symphysis.L4..L5...163168...
7 Gonstead Pelvic Analysis Draw line perpendicular to the FHL through the S1 tubercle to be displayed adjacent to the symphysis pubisMeasure between pubic symphysis dot and resultant line (mm); display just caudal to the pubic symphysis dot.(having the computer automatically compute the measurement would be a plus)L4..L5...163168..2.
8 Gonstead Pelvic Analysis Place a dot at the lateral aspect of each S1 facet baseDraw a connecting line, the sacral base lineL4..L5.....163168..2.
9 Gonstead Pelvic Analysis Place a dot on the most lateral aspect of the right and left sacral wingLines perpendicular to the femur head line should be drawn extending from these dots, as well as the S2 dot, to contact the sacral base lineThe distance between each of these intersections on the sacral base line should be measured (left to S2, right to S2).Display measurements just medial to the left and right sacral dots.L4..L5...60..55..163168..2.
10 Gonstead Pelvic Analysis Calculate the Measured Deficiency (m.d.)Extend a line horizontally from most superior aspect of the higher of the two femur heads to overly the lower femur head. This line would be best represented by a short line above the lower femur head.Measure the true vertical distance from the most superior aspect of the lower femur head to the line (from the previously placed dot to the line).Record the measurement adjacent to the end of the horizontal line with the label “MD” (as pictured)L4..L5...60..55..3MD163168..2.
11 Gonstead Pelvic Analysis Place a dot on the most lateral aspect of the right iliac wingPlace a dot on the most medial aspect of the posterior superior iliac spineLines perpendicular to the femur head line should be drawn through these dotsMeasure perpendicular distance between the resultant linesDisplay measurement just medial to the lateral dotRepeat for the left sideL4..L5...60...5589..83...3MD163168..2.