Biomedical subjects
Publications and source records attributed to P Lebraud.
The PFTE (Goretex) is a new material of expanded polytetrafluoroethylene with biocompatible properties and little foreign body reaction. It is useful in correction of ptosis by suspension of lid to frontalis muscle avoiding the sampling of autogenous fascia lata in the upper leg. Details of the surgical technique are discussed.
Explore the source record for details and available documents.
A retrospective study of 165 cases of dacryocystorhinostomy (DCR) has been performed in order to establish a relationship between the results and the delay between the initial symptoms and the DCR. The study compares the results obtained in 25 cases of DCR performed for post traumatic injury to those obtained in 165 cases of DCR performed for various etiologies (traumatic cases included). Traumatic cases are more frequent in men 19/ 25 cases (73%); infectious etiologies are more frequent in women 98/ 118 cases. The results are nearly the same for all the etiologies: 87% good results for the overall (147 cases), 88% good results for the traumatic cases (24 cases). The stenosis occurs within the first month in 72% and before the fourth month in all the cases. There is no difference in the results according to the surgical technique however the small number of each group does not allow a statistical analysis. The results are better when the delay between the initial traumatism or the first surgical repair and the DCR is more than six months (15 good results for 15 cases). The results were worse when the delay is less than 6 months (6 success for 9 cases), with p = 0.07 in the statistical analysis.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
The embryology of the human lacrimal system is not clearly defined in the literature and two hypotheses exist: the first suggests that the origin of the lacrimal system is from an ectodermal fold forming a sulcus of the naso-optic fissure. The second, with few defenders, describes the first rod of cells as meeting a second one which appears to emerge from the primitive nasal cavity. A study of ten human embryos, aged from 14 to 25 weeks and with a length of 12 to 33 cm, examined by histologic sections of 10 microns, revealed no lacrimal origin in the primitive nasal cavity near the inferior meatus. A further interesting point was that in three of the four embryos aged four months the lacrimal point was opened. Most authors, however, found the lacrimal sac and the nasolacrimal duct to be dilated, especially in one case where the inferior part of the nasolacrimal duct at the ostium below the inferior turbinate and meatus was widely dilated. In all the cases, the lower end of the duct was separated from the nasal cavity by a fine membrane in opposition with the nasal mucosa.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.
Explore the source record for details and available documents.