Gonstead Pelvic Analysis

1
Gonstead Pelvic Analysis
L1
L2
L3

• Click to label each segment
• Would like have prompts (ex. click on L1, click
  on L2)

L4
L5
2
Gonstead Pelvic Analysis
L1
L2
L3

• 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

L4
L5
.
.
3
Gonstead Pelvic Analysis
L1
L2
L3

• 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 position

L4
.
.
L5
.
.
.
.
4
Gonstead Pelvic Analysis
L1
L2
L3

• All lines flying in are constructed parallel to
  the femoral head line.

L4
.
.
L5
.
.
.
.
5
Gonstead Pelvic Analysis
L1
L2
L3

• 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 side
• Measurements ( 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
.
.
163
168
.
.
6
Gonstead Pelvic Analysis
L1
L2
L3

• Place dot on S2 tubercle (or S1if preferred/
  visualized).
• Place a dot in the center of the pubic symphysis.

L4
.
.
L5
.
.
.
163
168
.
.
.
7
Gonstead Pelvic Analysis
L1
L2
L3

• Draw line perpendicular to the FHL through the S1
  tubercle to be displayed adjacent to the
  symphysis pubis
• Measure 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
.
.
.
163
168
.
2
.
.
8
Gonstead Pelvic Analysis
L1
L2
L3

• Place a dot at the lateral aspect of each S1
  facet base
• Draw a connecting line, the sacral base line

L4
.
.
L5
.
.
.
.
.
163
168
.
2
.
.
9
Gonstead Pelvic Analysis
L1
L2
L3

• Place a dot on the most lateral aspect of the
  right and left sacral wing
• Lines perpendicular to the femur head line should
  be drawn extending from these dots, as well as
  the S2 dot, to contact the sacral base line
• The 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
.
.
163
168
.
2
.
.
10
Gonstead Pelvic Analysis
L1
L2
L3

• 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
.
.
3MD
163
168
.
2
.
.
11
Gonstead Pelvic Analysis
L1
L2
L3

• Place a dot on the most lateral aspect of the
  right iliac wing
• Place a dot on the most medial aspect of the
  posterior superior iliac spine
• Lines perpendicular to the femur head line should
  be drawn through these dots
• Measure perpendicular distance between the
  resultant lines
• Display measurement just medial to the lateral
  dot
• Repeat for the left side

L4
.
.
L5
.
.
.
.
.
60
55
.
.
89
83
.
.
.
.
3MD
163
168
.
2
.
.