[2-stage resection and reposition in congenital hip dislocation].
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Traumatic hip dislocation is by far less common in children than in adults. It occurs 4 times more frequently in boys than in girls. The force of the trauma leading to hip dislocation can be surprisingly small. Incomplete reduction is mainly caused by soft-tissue interposition or fragments of cartilage from the acetabulum. In such cases an X-ray examination will reveal a lateral protrusion of the femoral head. CT scans and MRI investigation play an important role in further diagnostics of the patient. The paper presents the case of a 5 year old boy with traumatic hip dislocation complicated by soft-tissue interposition. After an unsuccessful attempt of closed reduction, the hip was reduced surgically. The interposing element was removed--part of the cartilagenous insertion (size: 3 x 3 mm) of the femoral head ligament. During a follow-up examination 10 months post-op no signs of necrosis nor loss of ROM were noted.
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The course of development of acetabulae after the reduction of congenitally dislocated hips was investigated to identify factors that might predict the need for acetabuloplasty. One hundred five congenitally dislocated hips in 83 children were followed roentgenographically for an average of eight years after reduction. While the percentage of children requiring later acetabuloplasty increased somewhat with advancing age at the time of reduction, numerous acetabulae in the older groups developed satisfactorily without later surgery. The prereduction acetabular index proved a much more reliable predictor of the need for later acetabuloplasty. Sixty percent of those with an acetabular index greater than 37 degrees required later pelvic surgery, compared with 17% of those with a prereduction index less than 30 degrees. The major acetabular response occurred in the first year after reduction in children whose hips were reduced before the age of three years, whereas the maximal response in children whose hips were reduced after three years of age occurred in the second through fourth years. A further drop can be expected in all reduced hips of children between the ages of eight and 11 years.
This study was designed to determine the incidence of congenital dislocation of the hip on the island of Lastovo in the period from 1885 to 1993. There was a total of 19 infants with congenital dislocation of the hip out of the 3676 babies who were born alive. The overall incidence accounted for 5.2/1000 live births. Our findings demonstrated that a high incidence of the disease (57.9%) was strongly correlated to a positive family history. In the majority of cases, the diagnosis of congenital dislocation of the hip was established in the walking age. From 1960, children are born in the maternity hospitals, and the disease is consequently discovered and treated earlier.
Two cases of inferior obturator dislocation complicating treatment of congenital hip dislocation with closed reduction are described. Abduction and hyperflexion appear to be predisposing factors in development of this complication. Application of skin traction before any attempt is made at reduction will lengthen contracted soft tissues and may convert the inferior dislocation to a more manageable position. Open reduction was necessary in both patients, and the results were considered good.
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Posterior hip dislocation associated with acute injury to the thoracic aorta is a previously unrecognized injury complex. This study reveals that 8% of patients with posterior hip dislocation have associated injury to the thoracic aorta because of abrupt deceleration injuries. This study defines the association of traumatic posterior hip dislocation and acute traumatic injury of the thoracic aorta, describes the mechanism of injury, and discusses the evaluation of a patient with a suspected acute traumatic aortic injury.
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The hallmark of teratological congenital hip dislocation is its advanced severity at birth, signifying longer antenatal duration and accentuation of distortion. There may be contributions from a multiplicity of unrelated syndromes, such as local intrauterine factors, failure of proper formations early in the embryonic period, or genetically determined disorders. Treatment is generally difficult and the end result is uncertain.
AIM: To present the results of medial approach in open reduction of congenital hip dislocation, with the preservation of the medial femoral circumflex artery. METHODS: We operated on 48 nonreducible hip dislocations diagnosed in children aged 6-27 months. Twenty-two hips (17 patients) were available for clinical and radiographic follow-up. The median age of children at the time of operation was 15 months (range 7-29), and median duration of the follow-up was 4.5 years (range 3-14). The latest radiographic evaluation of the treatment outcome was based on Severins classification. RESULTS: There were three hips with the loss of concentric reduction. Osteochondritis developed in three, and coxa magna in seven hips. On final evaluation, 19 hips were rated as excellent or good (Severin I or II), and three hips as poor (Severin III or IV): one hip with evident ostechondritis lesions, and two hips with the loss of concentric reduction due to treatment discontinuation. CONCLUSION: By preserving circumflex medial artery and eliminating obstacles to reduction, vascularization of the femur head is ensured. The loss of concentric reduction is prevented by complete removal of all obstacles on the way of the femur head down to the bottom of acetabulum, by postoperative cast immobilization, and by walking with abduction orthosis for an appropriate period of time. Medial approach in surgical management of congenital hip dislocation in infants under 24 months of age is considered safe and efficient procedure.
Twelve children with hip dislocation were recorded from 18 hospitals of the GDR in a collective study conducted on behalf of the Working Group on Paediatric Traumatology. The closed approach was exclusively taken to all reductions, and all of them were performed within the twelve-hour limit. Avascular necrosis of the femoral head or other growth disorders were not observed. Relief periods were conspicuously differentiated, which gave rise to the proposal of unitisation of the therapeutic approach.
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We report the short-term results of 100 cementless total hip replacements in 52 severely dysplastic and 48 totally dislocated hips, with some new technical solutions to the problems involved. In cases with a very narrow iliac bone, the acetabular screw ring is seated below the true cotyloid area. In hips with tight flexor and abductor muscles or with deformities of the proximal femur, various osteotomies were performed. Special attention was paid to careful pre-operative planning and precise operative technique. In spite of a high complication rate the results were generally good and even patients who required reoperation were satisfied with the final result.
In this prospective study of 18 hips we compared the efficacy of ultrasound with CT in determining the position of the femoral head in a spica cast after closed or open reduction in children with developmental dysplasia of the hip. Ultrasound was performed through the perineal opening of the cast. With a transinguinal approach, the superior ramus of the pubis, the acetabulum, the femoral head and the femoral neck can be depicted in one plane. The CT and ultrasound images were blinded and reviewed by two of the authors. Ultrasound was inconclusive in the first two reductions since the perineal opening was too small to see all the landmarks in one plane. In the following 16 reductions the landmarks were well defined and interpretation of the CT and ultrasound was similar. The perineal opening in the spica cast should be made in such a way that the ultrasound probe can be positioned in the groin so that the landmarks can be shown in one plane.