arthrogryposis - llrsllrs.org/pdfs/annual meeting presentations/friday... · title: arthrogryposis...
TRANSCRIPT
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ROLE AND OUTCOME OF GASTROCNEMIUS
RECESSION IN TIBIAL LENGTHENING
Savanaranaraja Muthusamy, MBBS, MS
Samuel Zonshayn, MS II
Eugene W. Borst, BA
Austin T. Fragomen, MD
S. Robert Rozbruch, MD
Limb Lengthening & Complex Reconstruction Service.
Hospital For Special Surgery, New York.
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Disclaimer
The following authors have no financial disclosures:
Savanaranaraja Muthusamy, MBBS, MS
Samuel Zonshayn, MS II
Eugene W. Borst, BA
The following authors receive royalty from Small Bone
Innovations and are consultants for Smith and Nephew.
Austin T. Fragomen, MD
S. Robert Rozbruch, MD
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Introduction
Tibia lengthening is frequently associated with
Gastrocnemius contracture. Some patients do
and some patients do not need a Gastrocnemius
Recession (GR).
We performed a retrospective case matched
comparison study to find out:
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Questions
1. What are the risk factors that lead to the need
for GR?
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Questions
1. What are the risk factors that lead to the need
for GR?
2. What are the indications for GR during tibia
lengthening?
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Questions
1. What are the risk factors that lead to the need
for GR?
2. What are the indications for GR during tibia
lengthening?
3. What is the outcome after GR?
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MATERIALS AND METHODS
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Demographics
Group A (GR) Group B (No
GR)
P Value
Number of
patients
41 41 N/A
Number of Tibia
Lengthening
55 50 N/A
Age (Yrs) 33 28 0.178
Preop Tibial
Length (mm)
333 342 0.414
Time in Frame
(Months)
4 4 0.508
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Timing / Indication - GR
Timing Indication Pre GR Equines
Contracture –
Average in degrees.
At frame application Preoperative
Contracture
2.5
While in frame Recalcitrant
Contracture
20
At frame removal Recalcitrant
Contracture
15
After frame removal Recalcitrant
Contracture
9
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Physical Therapy
All the patients underwent
aggressive PT with tibia
lengthening to prevent
equines contracture.
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Surgical Technique
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Surgical Technique
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Surgical Technique
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Surgical Technique
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Surgical Technique
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We administered a self reported outcome
questionnaire.
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RESULTS
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Etiology: (Congenital - p value - 0.032)
0
10
20
30
40
50
60
70
Congen Develop Traumatic
GR %
No GR %
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Results
Group A
(GR)
Group B (No
GR)
P Value
Amount of
lengthening
(mm)
49 (24 – 82)
35 (8 – 75)
<0.001
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Results
Group A
(GR)
Group B (No
GR)
P Value
Amount of
lengthening
(mm)
49 (24 – 82)
35 (8 – 75)
<0.001
% of
Lengthening 15
(7 – 46)
11 (2 – 29)
0.002
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Length of follow up.
Length of the follow up
Average – 66 months
Range – 11 to 156 months
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Ankle DF gained after GR
Timing Indication Pre GR
Equines
Final DF DF gained P Value
At frame
application
Preop
Contracture
2.5 3.5 11 0.082
While in
frame
Recalcitrant
Contracture
20 6 26 <0.001
At frame
removal
Recalcitrant
Contracture
15 12 26 <0.001
After frame
removal
Recalcitrant
Contracture
9 5 14 0.005
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Ankle DF gained after GR
Pre GR
Equines
Final DF
DF gained
P Value
All 4
groups
combined
13
8
23.5
<0.001
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Ankle DF (All 4 groups combined)
Group A (GR)
Group B (No GR)
Pre tibia
lengthening 8 14
F/U 8
(After GR)
10
P Value 0.573 0.002
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ROC Curve for Threshold Value
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Before GR
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Before GR
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Before GR
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After GR
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After GR
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Self reported outcome questionnaire (Excluding group 1)
Question Group A
(GR)
Group B
(No GR)
P value
Ability to toe off on both feet 96.7% 91.7% 0.579
Ability to toe off on one foot 82.8% 87.5% 0.715
Ability to run 85.2% 85.2% 0.999
Presence of limp 21.4% 24% 0.823
Necessity for assistance to walk 3.6% 16% 0.176
Weakness of ankle compared to
before tibia lengthening
28.6% 16.7% 0.346
Stiffness of ankle compared to
before tibia lengthening
34.6% 33.3% 0.924
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Conclusion
Risk factors that led to need for GR
Amount of lengthening - 42 mm (Threshold value)
Percent of lengthening - 13% (Threshold value)
Congenital etiology
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Conclusion
Outcome
There was substantial gain in ankle DF after GR.
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Conclusion
Outcome
There was substantial gain in ankle DF after GR.
There were no significant differences in the self-
reported outcomes between groups A and B in
regards to functional outcome after GR.
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Conclusion
Outcome
There was substantial gain in ankle DF after GR.
There were no significant differences in the self-
reported outcomes between groups A and B in
regards to functional outcome after GR.
With the regular use of GR in selected patients with
equines contracture during tibial lengthening,
satisfactory and uniform outcomes were achieved.
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