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Biomedical subjects

E R Luque

Publications and source records attributed to E R Luque.

10 recordsLinked to original sources
PubMed1989

[Segmental spinal instrumentation in neuromuscular scolioses].

Ninety-nine patients with neuromuscular scolioses treated by segmental spinal instrumentation (SSI) between 1978 and 1983 are presented. All patients were followed-up for an average of 7.2 (5.3-9.8) years after the operation. The average correction achieved was from 78 degrees to 31 degrees for scoliotic deformities and from 62 degrees to 42 degrees for sagittal deformities. The causes and management of major complications are discussed. Special surgical techniques for fixation of the lumbosacral junction are described, and the latest advances in the SSI system, such as the application of hooks, screws and alignment devices, are presented.

Adolescent↗
PubMed1988

A new semirigid method for interpedicular fixation of the spine.

A new, semirigid method for interpedicular fixation of the spine is described. The system has safety factors, flexibility, and other advantages over some systems now in use. Details in technique are given. Eighty cases have been followed for an average of 18 months. Results of the series are presented, and indications and contraindications for use of this system in spinal surgery are outlined.

Adult↗
PubMed1986

Segmental spinal instrumentation of the lumbar spine.

Obtaining an arthrodesis of the lumbar spine has always been a problem, especially in the presence of severe disease. The understanding of the segmental character of the lesions and the application of sound orthopedic principles toward low-back spine pathology has led the way to improving arthrodesis with rigid internal fixation. For about eight years, segmental spinal instrumentation has been used in 352 cases to "stabilize" the spine. Many modifications have taken place and knowledge of the biomechanics of abnormal spine has increased through designs of new methods for different disorders. Fixation of low back, when indicated, should be rigid. The rectangular or rhomboid-shaped rod, bent to conform to the lamina cephalad and caudad, and fixed segmentally, proves to be the most rigid. It is contoured to maintain lordosis, sometimes in distraction, sometimes in compression. Fixation is not a substitute for correction of bony deformity or a good surgical arthrodesis. The objective is to maintain correction and promote prompt bony fusion.

Adult↗
PubMed1986

Interpeduncular segmental fixation.

Attempts at segmental correction and fixation of the vertebral column usually result in biomechanical instability, defined as an alteration of any two of the longitudinal mechanical columns. This leads to a system that involves all three columns to restore stability to the spine. The use of specially-designed interpeduncular screws bilaterally and segmentally permits firm attachment of each vertebra through the pedicle and into the vertebral body, thus covering all three biomechanical columns. By attaching coupling screw drivers to each set of transpedicular screws, lordosis, kyphosis, and rotation can be corrected segmentally within the tolerance of disc elasticity. The correction of lateral deviation is accomplished in a segmental manner. As a preliminary report, 20 cases are presented between the ages of 15 and 55 years with a variety of spine pathology. All were treated with interpeduncular screw fixation (ISF) and arthrodesis. The average follow-up period is 15 months, so no conclusion of the rate of pseudoarthrosis can be made. The correction of pathology is 80% with balance and maintenance of physiologic saggital curves. There have been no complications in this group of patients.

Adolescent↗
PubMed1982

Segmental spinal instrumentation for correction of scoliosis.

Sixty-five consecutive scoliosis patients, 25 with idiopathic deformities and 40 with postpoliomyelitis deformities, were treated by preoperative correction, segmental spinal instrumentation with arthrodesis, and no postoperative immobilization. The follow-up ranged from 12 to 25 months (average, 18 months); no patients was lost to follow-up. The initial deformity varied from 35 degrees to 140 degrees (average, 69 degrees), and the final correction varied from 53% to 93% (average, 72%). The average loss of correction was 1.5 degrees, or 2%. The complications in this group were two infections and two pseudoarthroses. The author believes that segmental spinal instrumentation gives a planned maximum correction of scoliotic deformities, provides a satisfactory method of rigid internal fixation of the spine that needs no external fixation, and leads to rapid efficient arthrodesis.

Adolescent↗
PubMed1982

Paralytic scoliosis in growing children.

Forty-seven consecutive patients younger than eight years of age were treated for scoliosis with Harrington rods and segmental wiring, without any external immobilization. The series included 38 postpoliomyelitis patients, six muscular dystrophy patients, and three paraplegics. The average correction was 78%, with an average loss of 8% per case. Follow-up averaged four years eight months. Growth in the area of immobilization averaged 4.6 cm. Four patients (9%) had complications after the first surgery, ten (48%) after the second surgery, and three (75%) after the third surgery. Fractured Harrington bars represented 7.5% of the complications after the first surgery, 35% after the second surgery, and 50% after the third surgery. Growth potential was partially preserved after subperiosteal dissection and segmental wiring. Good correction was obtained with the method, but Harrington bars broke and two to three supplementary operations were needed to accomodate for growth of the spine.

Child↗
PubMedDate not supplied

Pin benders.

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Humans↗