Chirurgie; memoires de l'Academie de chirurgie最新文献

The increased number of joint prostheses now being implanted into younger and active patients has made wear on polyethylene more apparent. This wear is the consequence of the bearing surface of polyethylene against metal. Research into the problem of wear is complex and other models such as metal-on-metal implants, ceramic-on-ceramic implants are tried to decrease the amount of particles accumulated after wear and avoid inflammatory reactions leading to bone lysis and implant loosening between 10 and 20 years.

In 1996, the outcome of any total joint replacement is loosening, occurring usually about 20 years after implantation. Loosening is not a mechanical failure of the bone-implant junction but the consequence of the osteolysis of the periprosthetic bone. It is due to an inflammatory pannus, a tissue constituted by macrophages, which are activated by wear particules originated by the articulating surfaces. The authors showed that this osteolysis is close from that observed with other inflammatory diseases and that it can be obtained with wear particules of many biomaterials, the polyethylene (PE) being the most common in clinical conditions. Several trends in order to reduce polyethylene wear or to replace PE by other materials are presented. Future improvements of the duration of joint prostheses depend on laboratories including surgeons involved in basic research: they are a mandatory link between the engineer and the biologist who study the mechanical and the biological aspects of the wear and of the fixation of biomaterials.

A homogeneous series of 104 patients with genito-urinary prolapse or urinary incontinence is reported. Surgical treatment combined promotofixation with (n = 45) or without (n = 59) subtotal hysterectomy, retropubic colpopexia and in certain cases posterior colpoperineorraphia with myorraphia of the levator ani (n = 28). Anatomic results were excellent for bladder and uterine ptosis. Moderate results were obtained for rectoceles and procedures involving the posterior perineum. A rectovaginal prosthesis or complete repair of the rectovaginal wall appeared to be required to improve results for rectoceles. Urine function was good for urinary incontinence: 91% success. Results depended on the pressure of the uretral closure. A complete urodynamic work-up is required prior to surgery in case of sphincter failure. Poor results were also related to excessive posterior traction which can open the cervico-uretral angle. Treatment of genito-urinary prolapse with promotofixation in combination with retropubic colpopexia is a reliable reproducible technique which gives excellent long-term results if excessive promontory traction is avoided and if, in certain cases, the rectovaginal wall is repaired or a prosthesis implanted when maximum uretral closure pressure is weak.

Surgical activity for 144,000 beds in 1605 health care facilities in France in 1992 are reported. Both public (49%) and private (51%) hospital beds were studied. There were 2456 surgical theaters and a representative sample of 450,000 operations was examined. There were 4723 authorized beds which were not installed and 1168 non-authorized beds which were installed. The number of authorized beds per 10,000 inhabitants ranged from 16.1 (Picardie) to 33.2 (Corsica). Operations per 10,000 inhabitants ranged from 568 (Picardie) to 992 (Languedoc-Roussillon). The most frequent operations were adenoidectomies-amygdalectomies, cataract, appendectomy, herniacure, varicose veins of the lower limbs. Among the emergency operations, 91% of the operations were performed in 1156 permantly operating theaters. In these theaters, there was, on the average, one night operation every 4 nights. Regional variations in the number of beds demonstrate the need for improvement in organization. For operations, migratory flow and age differences cannot explain all the differences observed. Medical management varies greatly suggesting that more rigorous methodology and clinical training are needed.

We report a study of 41 radical hysterectomies performed through laparoscopic approach for carcinoma of the cervix uteri. According to the FIGO staging, the tumors were classified as 12 stages Ia2, 24 stages Ib, 4 stages IIa and 1 stage IIb. 17 patients were treated by exclusive surgical procedure. 24 patients received a combination of radiation therapy and surgery 2 patients had a tumor of the cervical stump after subtotal hysterectomy. The mean duration of the procedure was 270 minutes. The post-op stay was 6.5 days. There was no major operative and postoperative complication. Only one patient required a blood transfusion. The intravenous pyelogram control was correct in all cases. At this time, with a 4 to 76 months follow-up, no recurrence was observed. This experience suggests the faisability of the laparoscopic radical hysterectomy. This approach seems to be convenient in young and non obese women with a tumor less than 4 cm in the greatest diameter.

Objective: The importance of preoperative 99mTc Sestamibi (MIBI) scintigraphy in case of reoperation for persistent hyperparathyroidism is well recognized, but it use as a systematic exploration technique remains a question of debate. We conducted this study to determine whether preoperative MIBI scans performed in all cases before surgery have any real impact.

Method: Two successive series of 65 operated patients were included in the study. In the first group, the MIBI scan was not performed prior to surgery while in the second group the MIBI scan was part of the systematic work-up.

Results: The sensitivity and positive predictive value of MIBI were 92% and 96% respectively. Sensitivity for unique adenomas was 95% and 80% for multiple forms. In the first group without systematic scans, there were two unproductive procedures. In the second group, all procedures were productive and no reoperations were required. Two mediastinal adenomas were removed at the first cervicotomy in this group. The rate of complications was similar for both groups. Mean operation time was 2 hours in the first group and 1 hour 30 minutes for the second.

Conclusion: Our series shows that there are three main advantages of using MIBI scintigraphy systematically prior to surgery for hyperparathyroidism: the procedure is easier in patients with cervical adenomas, particularly in case of ectopic localizations; the mean duration of the operation is shortened by 30 minutes; mediastinal ectopic localizations can be removed by sternotomy at the first operation. These advantages appear to be great enough to propose systematic use of MIBI scan prior to surgery. When MIBI scan shows a single gland, the risk of missing a multiple localization is less than 2% in our experience. It appears possible to operate under local anesthesia via a single-sided approach in elderly patients or high-risk patients.

Projectile trauma of the lower face causes major functional damage and disfigurement. Reconstruction with tissue flaps, after microsurgical revascularization to guarantee tissue vitality, can restore satisfactory mental function. We report 26 mental reconstructions, including 20 using free fibular flaps which, due to its vascular pedicle and length of the available bone, appears to be the best adapted for reconstruction of the lower face. When used with cutaneo-aponevrotic flaps, only one operation is needed.