Correcting Tracings for the Lumbo-Sacral A-P Control LSO.

Correcting Tracings for the Lumbo-Sacral A-P Control LSO

Correcting Tracings Given tracings and

an orthometry form you will prepare a “blueprint” to be used when fabricating the LSO

Correcting Tracings You will begin by

correcting the pelvic and thoracic bands

Correcting Tracings Both bands are

corrected the same way so begin with the pelvic band

Determining Band Lengths Locate the

circumference of the pelvis at the ASIS level on your orthometry form

Divide that number in half

Example: 35¸2=17 1/2 ¸

Determining Band Lengths If the original

circumference is 36” or under, add 1-1/2” to the result of the divided circumference to determine the corrected length of your band

Example:35”¸2 = 17 1/2”17 1/2” + 1 1/2”=19”

¸

Determining Band Lengths If the original

circumference is over 36”, add 2” to the result of the divided circumference to determine the corrected length of your band

Example:39”¸2=19 1/2”19 1/2” + 2”=21 1/2”

¸

Adjusting Band Tracing Divide the corrected

length in half Using a flexible tape

measure following the traced line, measure the resultant distance from the center line to both ends of the tracing and mark

Adjusting Band Tracing Connect those

marks with a straight line (transverse line)

Using a 90 triangle, draw a line perpendicular to the transverse line through the original center line

Adjusting Band Tracing Hold a ruler at 90

degrees to the adjusted center line and slide it down the line until the 2” mark just touches the curved tracing on both sides

Mark the points at which the rule touches the tracing

2” 2”

Adjusting Band Tracing Draw a line across

the tracing at that position. 2” 2”

Adjusting Band Tracing Draw a line across

the tracing at that position

Your completed corrected tracing will appear similar to this

Repeat the same procedures for the other band

Adjusting Paraspinal Bar Tracing On the paraspinal

tracing the S marks the inferior angle of the scapula

Using a flexible tape as before, follow the curves and mark the distance between the inferior angle of the scapula and the sacro-coccyx junction as indicated on the orthometry form

S

Sacro-coccyx junction

Inferior angle of the scapula

Adjusting Paraspinal Bar Tracing

The lower mark is referred to as the corrected inferior mark

S



(corrected inferior mark)


Measure 3/4” up from this mark to determine the adjusted inferior level

This mark represents the bottom of the pelvic band

S




Adjusted inferior level


Measure 1 1/4” below the inferior scapular angle to determine the adjusted superior level

This mark represents the top of the thoracic band

S

3/4”

Adjusted inferior level Sacro-coccyx junction


Adjusted superior level

1 1/4”


Measure 1 1/2” below the corrected superior level to determine the thoracic band bend mark

This mark represents the bottom of the thoracic band

S Inferior angle of the scapula

3/4”



1 1/4”

1 1/2”

Thoracic band bend mark




Measure 1 1/2” up from the adjusted inferior level to determine the pelvic band bend mark

This mark represents the top of the pelvic band

S Inferior angle of the scapula

3/4”


1 1/2”

Pelvic band bend mark


1 1/4”

1 1/2”





Place a ruler on the posterior side of the tracing

Move the ruler anteriorly until the edge touches the tracing at both the pelvic and thoracic band bend marks

S



S

1

2

3

4

5

6

7

8

9

10

11

1

2

13

1

4

15

16

1

7

18

1

9

2

0


Draw lines 1 1/2” long up and down from their respective bend marks

S



S

1

2

3

4

5

6

7

8

9

10

11

1

2

13

1

4

15

16

1

7

18

1

9

2

0


Your finished tracing should look like this

S



1

2

3

4

5

6

7

8

9

10

11

1

2

13

1

4

15

16

1

7

18

1

9

2

0


With the bands attached

Correcting Tracings for the Lumbo-Sacral A-P Control LSO.

Documents

Transcript of Correcting Tracings for the Lumbo-Sacral A-P Control LSO.