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Biomedical subjects

O Laccourreye

Publications and source records attributed to O Laccourreye.

At least 145 records · Page 8Linked to original sources
PubMed1993

Frey's syndrome analysis with biosensor. A preliminary study.

OBJECTIVE: Objective quantification of Frey's syndrome (gustatory sweating), following total parotidectomy. A biosensoring method of enzymatic electrodes enabling the detection of L-lactate on intact skin with the use of a skin extraction device and enzymatic electrodes is presented and analyzed. DESIGN: A criterion standard study. SETTING: This prospective trial was undertaken at our research laboratory (University of Paris [France]). Parotidectomy was performed in our department, which is a tertiary care center for parotid gland pathology. PATIENTS: Twenty-eight patients with gustatory sweating following total parotidectomy and nine control patients not operated on were asked to take part in this prospective study. MAIN OUTCOME AND MEASURES: Gustatory sweating was assessed in all patients using a clinical scale, the Minor starch iodine test, and the L-lactate biosensoring method. RESULTS: Instrumentation and assay procedure for the L-lactate biosensoring method are detailed. Statistical analysis of data was performed using the Kruskal-Wallis H Test and the Mann-Whitney U Test. Results demonstrate that this method enables objective measurement of the L-lactate on skin without the need for chemical reagents, continuous nondestructive analysis in real time, and physiological dynamic monitoring of the L-lactate rate of production after stimulus. Data achieved strongly suggested that the aberrant regeneration theory is the main clue to Frey's syndrome pathogenesis. CONCLUSION: This safe, reliable, noninvasive, objective, and highly sensitive method provides an investigative tool for clinicians as well as physiologists involved with patients presenting gustatory sweating following parotid gland surgery.

Adenoma, Pleomorphic↗
PubMed1993

Implantation metastasis following percutaneous endoscopic gastrostomy.

Since it was first described, the original percutaneous endoscopic gastrostomy (PEG) technique has proved to be a valuable adjunct in patients with head and neck tumours. This procedure is being increasingly utilized in the face of swallowing impairment related to head and neck carcinoma. Although generally well tolerated, it may be associated with complications. In this report, we document tumour implantation at the percutaneous endoscopic gastric site and review the report cases. It appears that implantation metastasis does alter prognosis.

Aged↗
PubMed1993

Biodegradable starch microspheres for cerebral arterial embolization.

RATIONALE AND OBJECTIVES: Various materials have been used to perform intracerebral and cervical arterial embolization for head and neck tumors and vascular malformations. This preliminary prospective study was designed to analyze the clinical and histopathologic consequences of arterial embolization into the brain using biodegradable starch microspheres. METHODS: A new arterial embolization procedure which ensured the integrity of the common and internal carotid arteries, without modifying the arterial flow, was designed. The procedure allowed for cerebral arterial microembolization in 20 Sprague-Dawley rats. Various amounts of biodegradable starch microspheres (Spherex) were introduced into the brain via the left external carotid artery. RESULTS AND CONCLUSIONS: Clinical and histopathologic results suggested that: 1) consequences of cerebral embolization using biodegradable starch microspheres are related to the amount of material embolized; and 2) Spherex microspheres behave differently from degradable microspheres in the brain. Despite the rapid biodegradability of the material, permanent damage from ischemia to the brain was noted.

Animals↗
PubMed1993

Supracricoid hemilaryngopharyngectomy in selected pyriform sinus carcinoma staged as T2.

From 1964 to 1985 supracricoid hemilaryngopharyngectomy (SCHLP) was performed at the authors' institution for 34 selected pyriform sinus carcinomas staged as T2. Tumors involved the anterior part of the pyriform sinus, the lateral wall, the medial wall, and the whole aryepiglottic fold in all cases. Tumors with invasion of the apex of the pyriform sinus, of the retrocricoid region, of the posterior pharyngeal wall, or with fixation of the true vocal cord were excluded from the study. Such a technique was aimed at preserving physiologic phonation, respiration, and swallowing while achieving the same local control rate as pharyngolaryngectomy. Patients were monitored for at least 6 years or until death. No patients were lost to follow-up. The 5-year cause-specific survival rate was 55.8%. The main cause of death was second primary tumor. The 5-year actuarial local recurrence rate was 3.4%. The authors' experience with the SCHLP technique challenges the traditional teaching of pharyngolaryngectomy and establishes this technique as a safe method of voice preservation in selected cases of pyriform sinus carcinomas.

Adult↗
PubMed1993

[Classification of dysphonia. Vocal dysfunction].

A review of functional dysphonia is presented, pointing out the frequent association with organic dysphonia as a releasing or an aggravating factor. Each pathology is described with its psychopathological and histological features, its clinical and psychophysiological symptoms and its treatment, most of the time based on voice therapy.

Cysts↗
PubMed1993

[Acoustic evaluation and use of computers].

Thanks to the measurements of the acoustical parameters of voice and speech, an objective semeiology can be set up to assess a diagnosis and, to a certain extent, a prognosis and the follow up after therapy. A computerized analysis is a good complement to the clinical evaluation. It gives quantitative values, with statistics and the means to compare patients to themselves and to other patients. After defining the parameters we are interested in, we review the different softwares at our disposal with their limits.

Diagnosis, Computer-Assisted↗
PubMed1993

[How to edit a scientific article and where to publish it?].

The editorial aspect of scientific writing cannot be dissociated from the scientific message it carries. Precision, clearness and conciseness are qualities which express the level of rigour reached in the scientific work presented. By gaining knowledge of the universally accepted rules for medical writing, and abiding by them, authors can expect optimal diffusion of the scientific content and facilitate reader comprehension. This paper outlines the precise rules common to all scientific articles and gives details on the elements on which a biomedical journal bases its decision on whether or not to publish the results of the author's work.

Humans↗
PubMed1993

[Laryngostroboscopy].

Videostroboscopy has become an essential examination for the assessment of vocal function. The authors describe and review the development of this technique with an analysis and discussion of its indications and results.

Fiber Optic Technology↗
PubMed1993

[Conservative surgery of the larynx as an alternative to total laryngectomy after neoadjuvant chemotherapy. Initial results].

A retrospective study of 149 squamous cell carcinomas of the larynx and epilarynx in whom a total laryngectomy was initially planned is reported. All the patients were treated by neoadjuvant chemotherapy. After completion of chemotherapy, the initially planned therapeutic protocol was modified in 56 patients (37.6%) in order to preserve the laryngeal physiologic functions. A total laryngectomy was performed in 23 patients (41%), radiation therapy was administered to 14 (25%) patients chemotherapy was prolonged in 15 patients (26.8%) and four deaths were related to chemotherapy toxicity (7.2%). Actuarial survival of patients treated by partial laryngectomy was statistically higher than survivals of patients treated either by radiation therapy or prolonged chemotherapy. After completion of neoadjuvant therapy patients who refused a total laryngectomy had the worst survival of the series. These results suggest that surgery of the residual tumor (partial laryngectomy) after neoadjuvant chemotherapy could be indicated for selected laryngeal carcinoma in whom a total laryngectomy was initially planned.

Actuarial Analysis↗
PubMed1993

[Medical innovation. Patents and confidentiality].

Enhanced knowledge of medicine and commercialization of an innovation (product, equipment, drug ...) are the classical aims of all medical research. Only the successful commercialization of the innovation allows the largest number of patients to benefit from the achievements of this research. Successful commercialization depends on the effective cooperation between the medical researcher who possess the potential for innovation and industry which provides the means necessary for its development. This cooperation is facilitated if the innovation is patented and if researcher ans industry work together under a contract of confidentiality. In order to improve the cooperation necessary between industry, research scientists, and clinicians, we review the current rules and regulations pertaining to patents and confidentiality. An annex is included with examples of a consultants contract and a secrecy agreement.

Confidentiality↗
PubMed1992

T1 squamous cell carcinoma of the arytenoid.

Twenty-two cases of early squamous cell carcinoma of the arytenoid cartilage staged as T1 according to the 1983 American Joint Committee for Cancer Staging Classification system were reviewed. Eighteen percent of the patients showed no symptoms. In the remaining 82%, the main presenting symptom was pain in the form of sore throat, odynophagia, or otalgia. Radiotherapy and partial laryngeal surgery were the options retained for the treatment of the larynx. A "watch and wait" policy or preventive treatment of the ipsilateral jugulocarotid lymph nodes were the treatment options retained for the neck. Significant differences were noted in terms of local and nodal recurrence between the two programs. Results indicate that partial laryngeal surgery with total arytenoidectomy and preventive treatment of the neck appear to be advisable for this particular type of primary lesion.

Adult↗
PubMed1992

[Intra- and extracranial nasopharyngeal fibroma. Contribution of imaging and study of local failure. Report on 34 patients].

Thirty-four patients with nasopharyngeal angiofibroma were treated between 1975 and 1990. Lesions were classed according to Sessions' classification. 17 showed intracranial extension. Treatment always associated embolization and surgical excision using a transfacial approach and, if necessary, neurosurgical techniques. A total of 13 patients (38.2%) developed recurrent lesions; these included 3 (17.6%) patients in the extracranial group and 10 (58.8%) patients in the intracranial group. Erosion of the clivus and displacement of the cavernous sinus seem to be 2 factors significantly associated with the development of recurrent lesions. Symptomatic recurrences were managed by surgery. Close clinical and radiological follow-up of patients with asymptomatic recurrent tumor made it possible to observe the stabilization, or even, the regression of the tumor. This study also underlines the importance of modern diagnostic and interventional imaging, which makes it possible to better determine tumor extension and to perform highly selective embolizations. Modern imaging also detects recurrences which once would have remained unknown because of their small size and the absence of symptoms. The techniques of embolization of the tumor branches from the internal and external carotid arteries are explained. Finally, our results are compared to those published in the literature.

Adolescent↗
PubMed1992

[Partial posterior cordectomy with laser CO2 in bilateral recurrent paralysis].

Thirteen patients with bilateral vocal cord abductor paralysis were treated by Carbon Dioxide Laser Posterior Cordectomy. 6 out of 7 patients were decannulated. 92% of patients recovered a physiologic respiration. Advantages of this surgical technique are discussed in comparison with Endoscopic Laser Arytenoidectomy.

Adult↗
PubMed1992

[Stage T1 malignant tumors of the arythenoid. Analysis of a series of 26 cases].

26 malignant tumours of the arytenoid classified as T1 according to the UICC 1987, were treated in the ENT and Cervico-Facial Surgery wards to Hospital Laennec between 1961 and 1990. The natural history of these lesions, locoregional efficiency of the different treatments used, the part played by chemotherapy, survival, causes of death and therapeutic modalities used as a last measure, have been analysed. The frequency of tumours with neuroendocrine has been emphasized. Such a diagnosis should be questioned when the initial biopsy does not diagnose a well differentiated epidermoid carcinoma. The use of argyrophil colouring in order to find neurosecretive granules helps in carrying out the diagnosis. The treatment of tumours, classed T1 N0 M0, of the arytenoid, is based on partial, laryngeal surgery associated with a preventive, jugulo-carotidian-ipsilateral ganglionary intervention.

Actuarial Analysis↗
PubMed1992

[Adjuvant chemotherapy in supraglottic epidermoid carcinoma stage T3].

92 squamous cell carcinomas of the supraglottic larynx classified as T3 were treated from 1977 through 1987 and retrospectively analyzed. All the patients of this series received chemotherapy as initial treatment (2 cycles). From 1977 through 1981 the combination of Vincristine-Methotrexate-Bleomycin (VMB) was employed; after 1981, the protocol: Cisplatinum-5 FU with or without Bleomycin (CF) was administered instead of VMB. All the patients were then surgically treated on the tumoral site and cervical lymph chains. At 5-year, there was no significative difference between the two chemotherapeutic regimen in term of locoregional recurrences and second primaries. 5-year actuarial survival rate was higher for patients treated with the CF protocol (71%) versus (54%) with the VMB regimen. Systemic metastases occurred less frequently after CF (4.5%) than after VMB (22.4%). These findings suggest that chemotherapy has substantially some activity against microscopic distant metastases.

Actuarial Analysis↗
PubMed1992

[Evaluation and treatment of chronic pain after cervicofacial cancer surgery].

When lasting pain occurs after surgery of head and neck cancer, tumoral recurrence should be considered. In addition to curative treatment, relief of pain is often provided by opioid analgesics. Doses vary according to tolerance and patient. Other than digestive routes of administration may be required. Here are two clinical reports: the first case with cervical epidural analgesia by ambulatory autoadministration device (Patient control analgesia), the other one with intrathecal in C7-T1 catheter with port access in which morphine was injected every 24 hours resulting in efficient analgesia, in metastatic Pancoast's syndrome. Surgical or radiotherapy sequelae sometimes bring about pain; bilateral cervicalgy described as burns associated with pain-related depression, 18 months after glotto-subglottic partial laryngectomy, requires psychological support and carbamazepine for desafferation pain removed within 6 months. When the only treatment left appears to be analgesia after surgery of head and neck cancer, follow-up in a multidisciplinary pain treatment centre allows a therapeutical management with optimum tolerance and efficiency.

Adult↗