Exemplos de uso de Proximal fixation em Inglês e suas traduções para o Português
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The proximal fixations were set close to the areas of the removed native valve commissures.
A titanium intramedullary nail associated to two points of proximal fixation and two points of distal fixation was used.
Firstly, proximal fixation using the transverse pins was performed and then fixation in the tibia using a screw.
In some cases, perigraft leak may occur despite adequate proximal fixation of the endoprosthesis, leading to expansion of the aneurysm.
Proximal fixation consists on a sliding pin associated to a"support sheath" fixed on the nail, with variable sizes, and of a screw for rotational blockage.
The preference for dynamic distal fixation, except for those three cases that were already mentioned above,was due to the fact that we achieved stability with reduction and proximal fixation, allowing initial dynamization Figure 5.
To guarantee an adequate graft proximal fixation, most manufacturers recommend an infrarenal aortic neck of at least 15 mm.
The proximal fixation was executed first with two 4.9mm locking screws in the coronal plane, parallel to one another, with one for locking of the static type and the other dynamic.
INTRODUCTION The latissimus dorsi muscle(LDM)is a large triangular muscle with a proximal fixation in the spinous processes of the thoracolumbar fascia of the lower six thoracic vertebrae, the iliac crest, and the third or fourth lower ribs.
In the proximal fixation, it was sought to position the cephalic fixation element at the center of the head, 1 cm from the subchondral bone in normal bone and 0.5 cm in osteoporotic bone, in AP and lateral views.
Resch et al., for instance, used Dacron-covered,Gianturco stent-based graft prototypes with proximal fixation hooks in most cases, whereas other authors used third-generation commercial endografts, the design of which has been substantially perfected.
Following holes for proximal fixation, the nail presents a diameter of 12 or 10 mm, non-cannulated and a single length of 220 mm Figure 1.
The second incision, of about 4cm,was used to proximal fixation with sliding pin and anti-rotation screw, after guiding thread was placed and radioscopic control was performed.
However, in pins with two proximal fixation screws, there is difficulty in the positioning of the sliding screw in the center of the femoral head in the anteroposterior view.
In a comparative study using aortic stent grafts in humans aimed at evaluating iliac and aortic fixation, Melas et al. verified the improved proximal fixation with the Anaconda stent graft versus six other stents from different manufacturers. The improved proximal fixation is due to the presence of four pairs of hooks and the nitinol coating, which provides greater radial strength and an improved proximal seal.
In performing the proximal fixation, it was sought to position the cephalic fixation element at the center of the head, both in AP and in lateral view, at a distance of 1 cm from the subchondral bone in both views in normal bone and at 0.5 cm in osteoporotic bone.
Among the nine possible locations for the proximal fixation element in the head, the location was distributed between four zones in our study: central-central 36.8%, central-anterior 31.6%, central-posterior 15.8% and superior-central 15.8.
The use of double proximal fixation did not allow proximal fragment rotation, and the dynamic distal fixation, except for Tronzo V cases, allowed an early load, probably, being responsible for the absence of pseudoarthrosis or union delays.
The use of thoracic endografts to facilitate proximal fixation in abdominal aneurysms was already described in the literature. Variations of surgical technique have been described regarding the deployment of thoracic endografts before or after implantation of the main abdominal body, and both techniques presented good results.
Proximal bone fixation is achieved by means of 3.5 mm screws Figure 8- A and B.
The most important anatomic features that determine endovascular treatment are the tortuosity of the aorta and the diameter,the length of the proximal neck fixation area for the stent graft, and the access to the iliac-femoral segment.
In a biomechanical study conducted on cadavers, intramedullary fixation with proximal angular stabilization was shown to be less rotationally stable than use of fixed-angle plates. However, there was sufficient stability to allow clinical use, especially with regard to fractures of the surgical neck.