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J Y Lazennec

Publications and source records attributed to J Y Lazennec.

33 records · Page 2Linked to original sources
PubMed1995

[Normal and pathological MRI aspects of the posterolateral corner of the knee].

The purpose of the study is to compare normal PLC anatomy and its MRI appearance, with the various lesions observed in MRI, from the simple popliteus tendinous contusion to the complete PLC rupture. For this specific work on PLC lesions, we selected 61 examinations among the traumatic knees explored during the last 3 years. Surgical correlation is obtained for the 61 patients. MRI examinations are performed on a 0.5 T. unit with gradient echo T1, T1 and T1 GD-DOTA IV. Normal PLC anatomy is compared to the dissection of 4 anatomic subjects. Normal MRI slices are evaluated with this reference analysis. The principle anatomical structures of the PLC include the lateral collateral ligament, the popliteus tendon, the arcuate ligament, the fabello fibular ligament, the posterolateral condylar capsule, and the posterior horn of the lateral meniscus. Surgical findings confirm PLC lesion for 58 patients with 3 false positive. Diagnosis of these lesions is important because chronical posterolateral laxity is secondary to the destabilisation of lateral condyle. Unrecognised and untreated posterolateral instability may result in failure of ACL reconstruction. When clinical tests are doubtful or complex, or the examination very painful, MRI evaluates completely the traumatic knee and particularly the PLC.

Humans↗
PubMed1994

Ultrasono-anatomy of the ankle ligaments.

The ligaments of the ankle are superficial and easily accessible at ultrasonography. Surprisingly, the reliability of this technique has never been proven. With this goal in mind, ten ankles were subjected to a ultrasono-anatomic comparison. The five principle ligamentous fascicles (three on the lateral side and two on the medial side) measured at ultrasonography and the values verified after dissection. This study shows that the ligaments of the ankle are analyzed with ultrasonography and that the measures done are valid and have a precision of 2 mm for the anterior fascicle and the lateral fascicle of the lateral ligamentous plane Due to its simplicity and its low price, ultrasonography appears to be an important method in evaluating the ligaments and the degree of seriousness of ankle sprains.

Ankle Joint↗
PubMed1993

Partial cervicosternotomy: a useful anterior surgical approach to the cervicothoracic junction.

Access to the cervicothoracic junction, whether by lower anterior cervical or transthoracic approach, is particularly difficult. The authors propose partial cervicosternotomy which allows the T3-T4 disk to be reached satisfactorily in 50% of cases and in the remaining 50% allows direct anterior control of the upper two thirds of T3. The advantage of this approach is that it provides direct access to the cervicothoracic junction without leading at the same time to the reconstruction problems caused by the uni- or bilateral sternoclaviculotomies proposed until now. A detailed anatomical study of the arrangement of the intercostal vessels shows that this strictly median approach presents no risk to the medullary vessels thanks to the abundant anastomoses in this region. However, the use of this method may be limited if the aortic vessels have an anomalous origin. Pre-operative angiography is therefore necessary each time T3 must be reached. This approach has already been successfully used in tumor surgery for excision and reconstruction of lesions involving the cervicothoracic region.

Humans↗
PubMed1992

Arterial supply of the acetabulum in the fetus: application to periacetabular surgery in childhood.

The need to perform triple osteotomies of the pelvis passing very close to the articular surface leads to the isolation of bony fragments whose vascularisation may be precarious. To assess the risks of such surgery, we undertook an anatomic study of the vascularisation of the acetabulum in the fetus. 53 specimens were injected to study the vessels to the acetabulum and their distribution within the osteocartilaginous specimen. The acetabular a., a branch of the obturator a., gives a central pedicle distributed to the acetabular fossa, the triradiate cartilage and ending in the three primary bony components. The superior gluteal, inferior gluteal, internal pudendal and obturator aa. form a periacetabular vascular circle. The abundant vascularity of the acetabulum makes massive necrosis improbable in the child. However, there is a zone of precarious anastomosis at the anterior portion of the acetabulum.

Acetabulum↗
PubMed1991

[Surgical treatment of spinal metastases].

Spinal metastasis often lead to two main complications: back pain and para or tetraplegia. Performed alone radiotherapy may be too slowly efficient to allow a neurological recovery. Laminectomy may improve the neurological signs but does not induce any change on root pain and it increases instability. A surgical procedure by a posterior approach including laminectomy and fixation by plates and transpedicular screws fits these two goals: decompression and stabilisation. The first 189 cases are reported: the first month lethality is about 15%. 81% of fixations remained unchanged. 21 out of the 62 patients with loss of autonomy recovered an ability to walk. Besides this palliative surgery, a total spondylectomy has been done 13 times in order to perform a curative surgery for unique metastasis of cancers with long life expectancy. An early walking is often possible and after healing of the wound, a complementary treatment with radio or chemo therapy may be started without any risk of pain or neurological compression.

Adult↗
PubMed1990

[Cartilaginous and bony anatomy of the human cotyloid cavity: preliminary study for the analysis of the specific dynamics of cotyloid cornua].

Recent studies on acetabular and periacetabular deformations help to understand hip functioning. They encourage a new anatomic analysis of the bony and cartilagenous frameworth of the hip. The authors report as biomechanical preleminary, a radiological and anatomical study on the behavior of the periacetabular region. The results are compared to the anatomical litterature and conclusions are drawn.

Acetabulum↗
PubMed1990

[Anatomo-radiologic approach of the mechanical pathology of the upper fibulo-tibial joint].

The authors report a study of 150 cadavers dissections. The morphology and topography of the proximal tibiofibular joint were analysed. The numerous anatomo-radiological variations encountered explain the different pathologies seen in clinical practice. The authors insist on the influence of this joint on ankle motion and recommend an association of a distal diaphyseal resection of the fibular when an arthrodesis of the proximal tibio-fibular joint is performed.

Autopsy↗
PubMed1987

[Extra-coracoid axillary approach to the gleno-humeral joint].

The authors advocate an elective approach to the lower part of the humeral (shoulder) joint by an original axillary route. This route is external to the short head of the biceps brachii muscle which is retracted together with the neurovascular bundle. The articular capsule is opened through the space between the subscapular and latissimus dorsi muscles. The skin incision is cosmetic. No muscle is cut, and in surgery for anterior instability of the shoulder the crucial area is automatically exposed. This technique, however, requires two assistants and may be arduous in very muscular subjects. In addition, the visibility of the rest of the humeral joint is limited. With a few precautions, the neighbouring vessels and nerves are well protected.

Axilla↗
PubMed1987

[Surgical treatment of Achilles tendinitis in athletes].

A study of 65 cases of Achilles tendinitis treated surgically has allowed us to define the specific symptomatology of the lesion which particularly affects young athletes. Surgical treatment should only be given for high-level athletes who are well-motivated and in whom tendinitis prevents their sporting activity and has proved resistant to prolonged and adequate medical treatment. The details of the suggested operative technique are described. A review of the results shows that, after unsuccessful medical treatment, surgical treatment allowed the athlete to return to his sporting activity in 86 per cent of cases. Post-operative cutaneous or tendinous complications were rare and were directly linked to intra-tendinous injections with steroids.

Achilles Tendon↗