The Journal of Bone and Joint Surgery (American) 85:2349-2357 (2003)
© 2003 The Journal of Bone and Joint Surgery, Inc.
Correction of Sagittal Plane Spinal Deformities with Unit Rod Instrumentation in Children with Cerebral Palsy
Glenn E. Lipton, MD1,
Eric J. Letonoff, DO2,
Kirk W. Dabney, MD3,
Freeman Miller, MD3 and
H. Catherine McCarthy, BA, MS3
1 Department of Orthopaedic Surgery, Drexel University College of Medicine,
Broad and Vine Streets, Mail Stop 420, Philadelphia, PA 19102
2 Department of Orthopaedic Surgery, St. John Oakland Hospital, 27351 Dequindre,
Madison Heights, MI 48071
3 Division of Orthopaedics, Alfred I. duPont Hospital for Children, 1600
Rockland Road, Wilmington, DE 19899. E-mail address for K.W. Dabney:
kdabney{at}nemours.org
Investigation performed at the Alfred I. duPont Hospital for Children,
Wilmington, Delaware
The authors did not receive grants or outside funding in support of their
research or preparation of this manuscript. They did not receive payments or
other benefits or a commitment or agreement to provide such benefits from a
commercial entity. No commercial entity paid or directed, or agreed to pay or
direct, any benefits to any research fund, foundation, educational
institution, or other charitable or nonprofit organization with which the
authors are affiliated or associated.
Background: To our knowledge, there have been no previous studies
addressing the indications for and the results of treatment of patients with
cerebral palsy and concomitant kyphosis or lordosis without scoliosis. The
purpose of the present study was to identify the indications for and the
results of treatment of patients with cerebral palsy who have a spinal curve
deformity solely in the sagittal plane.
Methods: We conducted a retrospective review of the data on all
patients with cerebral palsy who had a sagittal plane spinal deformity but no
coronal plane deformity, had undergone posterior spinal fusion with unit rod
instrumentation at our institution, and had been followed for at least two
years. Medical records and radiographs were reviewed for symptoms, type and
magnitude of deformity, age at surgery, duration of surgery, nutritional
status, complications, and concomitant medical problems.
Results: Twenty-four patientsten boys and fourteen
girlswere identified. Eight patients had a hyperlordotic deformity,
fourteen had a hyperkyphotic deformity, and two exhibited both. Surgical
indications included severe seating problems that could not be rectified with
wheelchair modifications (eighteen patients), severe back pain (four
patients), superior mesenteric artery syndrome that was refractory to
conservative treatment (two patients), and a hyperlordotic deformity with a
loss of bowel and bladder control (one patient).
It was found that specific technical concerns had to be addressed when the
unit rod instrumentation was used. The mean preoperative hyperkyphotic curve
of 93.8° was corrected to a mean of 35.8° postoperatively and was a
mean of 34.8° at the last visit. The mean preoperative hyperlordotic curve
of 91.8° was corrected to a mean of 43.6° postoperatively and was a
mean of 48.6° at the last visit. All patients with seating problems and
back pain had improvement or resolution of the problem after the surgery. The
superior mesenteric artery syndromes, losses of bowel and bladder function,
and malnutrition all resolved completely after the surgery.
Conclusions: Patients with cerebral palsy and a severe sagittal
plane deformity ( 70°) can be treated successfully with posterior
spinal fusion with use of unit rod instrumentation. Indications for treatment
include loss of sitting ability or balance, back pain, loss of bowel or
bladder function, and superior mesenteric artery syndrome that is unresponsive
to medical management.
Level of Evidence: Therapeutic study, Level IV (case
series [no, or historical, control group]). See Instructions to Authors for a
complete description of levels of evidence.

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Related articles in JBJS:
- Correction of Sagittal Plane Spinal Deformities with Unit Rod Instrumentation in Children with Cerebral Palsy
- Kirk W. Dabney, Freeman Miller, Glenn E. Lipton, Eric J. Letonoff, and H. Catherine McCarthy
JBJS 2004 86: 156-168.
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