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Biomedical subjects

C Dumontier

Publications and source records attributed to C Dumontier.

At least 37 records · Page 2Linked to original sources
PubMed2001

[Impact factor or do we have to choose between the impact factor and the Revue de Chirurgie Orthopédique?].

It is common practice to evaluate the scientific value of a candidate for a university or hospital position using the mean of the impact factors of the journals he/she has published in. This shows that the true composition and true meaning of the impact factor are not sufficiently understood. The impact factor was invented in the 60s to help librarians choose the most read journals. The impact factor provides an accurate definition of the distribution of a journal, but in no case the quality of its publications. Moreover, the impact factor has many technical limitations that are detailed in this article. This strongly limits the accuracy of the impact factor to compare between journals of different specialties. There is no correlation between the scientific value of a single author and the impact factor of the journals he/she has published in. Eugene Garfield, the inventor of the impact factor, has emphasized that it should not be used to judge the scientific value of a candidate.

Abstracting and Indexing↗
PubMed2000

[Posterior shoulder instability in athletes: surgical treatment with iliac bone block. Apropos of 6 case reports].

PURPOSE OF THE STUDY: Sports activities requiring antepulsion, adduction and medial rotation can favor the development of posterior instability of the shoulder. Conservative treatment is indicated, but many techniques have been proposed in case of failure. All do not allow recovery of the same sports level. We report our experience with six cases of posterior shoulder instability treated with a Gosset posterior bone block. MATERIAL AND METHODS: We retrospectively reviewed cases treated between 1974 and 1995. Six athletes, aged 17 to 34 years (mean 25 years) underwent posterior bone block surgery using the Gosset procedure on their dominant shoulder. Three of the patients had experienced involuntary dislocation and three others involuntary and voluntary dislocation. One patient had a multidirectional hyperlaxity. Five patients had participated in rehabilitation programs for at least five months. Two patients had undergone unsuccessful bone block surgery in another unit. RESULTS: Stability and pain relief were achieved in all cases. Three patients recovered complete mobility. In the three others, mean limitation of mobility for the different sectors was 15 degrees. There has been no sign of osteoarthrosis at three years follow-up. All patients have resumed their sports activities, three at the same level. DISCUSSION: In our experience, most surgical techniques proposed for the treatment of posterior shoulder instability are unsuccessful. The Gosset iliac bone block prolongs the articular surface. After consolidation, it allows sports activities requiring shoulder force and provides satisfactory mobility.

Adolescent↗
PubMed1999

Onychomatricoma.

We report a case of onychomatricoma, which is a rare benign tumour originating in the germinal matrix of the nail. The diagnosis can be made on the typical clinical findings and confirmed by histology. Complete excision is the treatment of choice.

Fingers↗
PubMed1998

A short-term supplementation of pregnant women before delivery does not improve significantly the vitamin E status of neonates--low efficiency of the vitamin E placental transfer.

Little is known about lipid-soluble vitamin placental transfer. We supplemented ten pregnant women ranging in age from 26 to 38 years with vitamin E at a daily dose of 1 g dl-alpha-tocopherol acetate for 3 days before delivery. All pregnancies ranged from 37 to 39 weeks of gestation at the time of the study. Maternal blood was first drawn during the week preceding supplementation and then just before the delivery by hysterotomy. Neonatal blood was from cord at birth. Supplementation dramatically increased the plasma and red blood cell vitamin E of the mothers. This was true whatever the expression of the vitamin E content, i.e., plasma lipid-normalized or non-normalized vitamin E, and red blood cell vitamin E related to volume of packed cells or to membrane-phospholipid phosphorus. In contrast, the plasma vitamin E content was very low in neonates (3.51 +/- 0.38 mg/L) and did not significantly differ from that reported in a previous paper, where plasma was drawn from fetal cord blood of pregnant non-supplemented women belonging to the same geographical population (Cachia et al., Am. J. Obstet. Gynecol. 1995; 173: 42-51). This strongly suggests that the transfer of vitamin E through the placental barrier is very low. That the plasma lipid-normalized levels of mothers before supplementation and of neonates did not significantly differ also suggests that the paucity of lipids in the circulating blood of neonates is the cause of the restricted amount of plasma vitamin E. Therefore, the low level of vitamin E in neonates may result from both low maternal placental transfer and neonatal lipid transport peculiarities.

Administration, Oral↗
PubMed1998

[Vaginal metastases of breast cancer].

Metastases to the vagina from breast carcinoma are uncommon, and are most often detected during autopsies of patients who have died from a breast cancer or from metastases to the genital tract. A case of symptomatic vaginal metastasis secondary to bilateral breast carcinoma is reported. The potential routes of dissemination include lymphatic and vascular spread. Their respective frequencies vary in the literature. Lymphatic spread in this case is suggested by demonstrable ovarian, myometrial, and lymph node involvement associated with massive submucosal vaginal involvement. This observation of concomitant visceral and lymphatic spread improves our knowledge of metastatic spread from breast cancer to the female genital tract by the lymphatic route.

Breast Neoplasms↗
PubMed1998

[What's new in nail surgery?].

The author review the literature concerning progress in nail surgery. He presents several basic research studies on the blood supply of the ungual apparatus, very rare studies on pathophysiology and the contribution of magnetic resonance imaging. In practice, progress or new techniques in traumatology (haematomas, wounds of the nail bed and matrix, defects, distal amputations through the nail) and in the context secondary dystrophic lesions are considered. In particular, the indications for emergency and secondary microsurgery are defined. The only novelty in neoplastic disease concerns the discovery of a new tumour: onychomatricoma.

Emergencies↗
PubMed1997

-Arthrography and computed tomography arthrography of the wrist-.

After a brief review of the pertinent anatomy of joint compartments and main ligaments of the wrist, the authors present the technique of wrist arthrography and CT arthrography. They discuss the normal and pathological patterns. The main indications are the chronic painful wrist and posttraumatic wrist. Imaging can reveal ligament defects (particularly scapholunate ligament, or lunotriquetral ligament), triangular fibrocartilage tears, capsular defects, cartilage thinning, foreign bodies, synovial ganglia or synovitis of the wrist.

Arthrography↗
PubMed1997

[Useful imaging data before intervention for an unstable shoulder].

Recurrent instability of the shoulder may sometimes be a difficult diagnostic challenge. Bernageau's standard X-rays set, which includes 3 antero-posterior X-rays with medial rotation and 2 glenoid views, is able to confirm the existence of anterior instability events. However, it gives no information on the glenoid labrum and the glenohumeral ligaments. As surgical techniques are more sophisticated, more precise imaging techniques are needed in order to adapt the surgical technique to the anatomical lesions. Although CT arthrography is today the best imaging technique to choose a surgical technique, it will probably be replaced by MR arthrography in the near future. Pros and cons of each imaging techniques are described, together with their implications for the choice of treatment.

Arthrography↗
PubMed1996

Subungual giant cell tumor of the tendon sheath.

Although it is one of the most frequent neoplasms affecting the hand, the giant cell tumor of the tendon sheath has received little attention in the dermatologic literature. The first case of a subungual localization of giant cell tumor of the tendon sheath and a review of its main characteristics are reported.

Adult↗
PubMed1996

[Fractures of the distal radius with dorsal displacement: a comparative study of the predictive value of 6 classifications].

PURPOSE OF THE STUDY: The authors compare six classifications in a prospective study of distal radius fractures surgical treatment. Classifications included Castaing's, Frykman's, Gartland's, Older's, Lindström's and Jenkins'. MATERIAL: 96 patients presenting a distal radius fracture were included in a protocol comparing two surgical treatments. 42 were treated with styloid pinning and immobilization while 54 with intra-focal pinning and immediate mobilization according to Kapandji's technique. METHODS: Each patient was graded initially according to each six classifications. Patients were reviewed at 6 weeks, 3, 6, 12, and 24 months. Clinical and radiographical evaluation were performed. Clinical and radiological results were compared according to each group of classification. RESULTS: None of the six classifications appeared to have any utility to predict functional or radiological results. None was able to distinguish treatment option. DISCUSSION: The six classifications did not permit to predict clinical or radiological outcome of distal radius fractures treated by radial styloid pinning or Kapandji's technique. All those classifications have been described for conservative treatment rarely performed in France for displaced fractures. CONCLUSION: The six classifications tested showed no predictive value in K-wire treatment of dorsally displaced distal radius fractures.

Adolescent↗
PubMed1996

[Rupture of the flexor tendon of the hand caused by tuberculosis].

A 47 years-old man presented an atraumatic, spontaneous index flexor tendons rupture. This patient has been treated two years ago for a pulmonary tuberculosis. At surgery, the flexor tendons were infiltrated by a granuloma. Histologic examination was compatible with tuberculosis sequelae. According to literature review, this is the second reported case of a tendon rupture due to tuberculosis granuloma.

Follow-Up Studies↗
PubMed1995

Early results of conventional versus two-portal endoscopic carpal tunnel release. A prospective study.

The authors compare in a prospective, randomized study the early outcome of carpal tunnel release using either a conventional palmar open release (n = 40) or a two-portal endoscopic release (n = 56). Both groups were similar. No statistically significant differences were found regarding pain, disappearing of paraesthesiae or time to return to work. However, better recovery of grip strength was observed in the endoscopic group at 1 and 3 months. No surgical complications were observed in either group.

Adult↗
PubMed1995

Hook-nail deformity. Surgical treatment with a homodigital advancement flap.

Sixteen patients presenting 18 hook-nail deformities have been treated by the advancement of a homodigital island flap. With an average follow-up of 31 months; Results were considered good or excellent in seven cases, fair in seven and poor in four. Six cases, although improved, had a marked recurrence of the deformity, six had a partial recurrence and six had almost no recurrence. Patient satisfaction was limited as the finger still had a short nail and a square shape.

Adult↗
PubMed1995

Fracture of the distal radius. A prospective comparison between trans-styloid and Kapandji fixations.

We performed a prospective study on 96 patients with extra-articular or intra-articular fractures of the distal radius with a dorsally displaced posteromedial fragment. After closed reduction, we compared trans-styloid fixation and immobilisation with Kapandji fixation and early mobilisation. Forty-two patients of mean age 57.1 years +/- 18.1 (SD) were treated by trans-styloid K-wire fixation and 45 days of short-arm cast immobilisation. Fifty-four patients of mean age 57.7 years +/- 18.7 (SD) had Kapandji fixation and immediate mobilisation according to the originator. All the patients had clinical and radiological review at about six weeks and at 3, 6, 12 and 24 months after the operation. Pain, range of movement and grip strength were tested clinically, and changes in dorsal tilt, radial tilt, ulnar variance, and radial shortening were assessed radiologically. Statistical analysis was applied to comparisons with the normal opposite wrist. Pain and reflex sympathetic dystrophy were more frequent after Kapandji fixation and early mobilisation, but the range of motion was better although this became statistically insignificant after six weeks. The radiological reduction was better soon after Kapandji fixation, but there was some loss of reduction and increased radial shortening during the first three postoperative months. The clinical result at two years was similar in both groups.

Adult↗
PubMed1995

[Isolated punched-out lesions of the carpus and pain of the wrist].

Intra-osseous ganglia are among the more frequent causes of cystic lesions of the carpus and may be responsible for diffuse pain, possibly be related to biological activity of the lesions, or when the ganglia opens into the adjacent joint. A CT-scan is useful to determine their exact location and the presence of a cortical defect. Although not this feature is completely established, they seem to arise de "novo" from the bone although their fluid content is reminiscent of those of soft-tissue ganglia. Surgical curettage with bone grafting is only indicated when pain persists despite a period of rest.

Adolescent↗
PubMed1994

Entrapment and compartment syndromes of the upper limb in haemophilia.

17 patients with haemophilia have been treated for a neurological deficit of the upper limb. Four of the five entrapment neuropathies have been operated upon, and only two patients recovered completely. Only two of the 12 patients with a compartment syndrome have been operated upon, and only two had sequelae. Clotting factor replacement is always indicated as primary treatment. Surgical release is indicated if the condition fails to improve. Late treatment was responsible for incomplete recovery, whatever the cause of the nerve compression.

Adolescent↗