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Biomedical subjects

J L Plessis

Publications and source records attributed to J L Plessis.

17 recordsLinked to original sources

[Army surgeons and natal artery, a long connection: on the biography of Paul-Athanase Champenois].

Very frequently quoted in surgical medicine treaties, Champenois, a brilliant military surgeon associated his name to the technique used to control trauma hemorrhages of the superior gluteal artery. Even though current advances have made checking of the internal iliac artery easy, this surgeon's princeps document in 1871 deserves to be known and considered as a model. The authors review the highlights of this medical officer's military career made of overseas campaigns alternating with excellent scientific publications which can serve as examples.

Arteries↗

[Tholozan: military physician].

Born in 1820 Joseph-Desire Tholozan joined in 1841 as "chirurgien sous-aide auxiliaire" the French military Health Service, being still a medical student in Marseille where the School of Medicine was directed by his uncle F. Cauviere. He was later appointed at the hospital of Bastia, obtained his M.D. (Paris 1843), went back to Marseille and later to Metz (1845) and Paris, at the Val-de-Grace (1846-47). He returned there as assistant physician (1851) and later as professor "agrege" of Medicine (1852), his agregation thesis devoted to hematology being presided by Andral. Tholozan later participated to the Crimean war (1854-55) during which he performed important observations on infectious diseases (cholera, dysentery, typhus, typhoid fever) or deficiency ones (scurvy, acrodynia). An unpublished report given here deals with a probable epidemic of murine typhus occurring in soldiers returning from Crimea on an American ship which had been used to transport horses. Promoted first class major physician (1857) Tholozan was chosen in 1858 by the French ministry of Foreign Affairs to become the physician of the Shah of Persia, Nasreddin Shah. In this country where he remained until his death (1897) he will have a threefold activity as organizer of the medical teaching, epidemiologist (of plague and cholera) and as a surgeon. Principal first class physician (the equivalent of Physician-Colonel) in 1868, he was definitely dismissed from the Army in 1880.

France↗

The intraorbital arrangement of the anterior and posterior ethmoidal foramina.

This study, instigated by surgical observations, and mainly carried out on the dry bone, attempts to analyse both the depth and variability of the anterior and posterior ethmoidal foramina through which pass the ethmoidal aa. The surgical implications of this study relate not only to ligation of the ethmoidal aa. in certain cases of epistaxis, their embolisation and the endonasal microsurgery of the ethmoid, but also to the surgery of the anterior cranial fossa. The study is based on 200 anatomic observations.

Arteries↗

[A developmental anomaly of Meckel's cartilage].

An atypical evolution of the mandibular cartilage was recorded in systematic dissections of the neck in the Anatomy Laboratory. This anomaly led to the formation of a supernumerary bony fragment in the concavity of the lower edge of the mandibular arch, with a slight adhesion thereto. This observation is reported by the authors after a recapitulation of the embryology.

Aged↗

The surgical anatomy of the middle nasal meatus.

An exact study was made of the middle nasal meatus in 20 anatomical preparations (left and right) from 10 subjects. Some features (the ethmoidal bulla, the uncinate process of the ethmoidal bone, the openings of the maxillary and frontal sinuses) are relatively constant in their arrangement, but very variable in shape and size. An understanding of these structures is now essential for the practice of endonasal microsurgery.

Adult↗

[Anatomical case on the middle meatus of the nasal cavity].

A serie of 20 dissections carried out in the anatomy Laboratory enabled us to make a close observation of the middle meatus of the nasal cavity. Certain anatomical parts such as the bulla, the unciform process, the ostia of the maxillary and frontal sinus are relatively set in their positions, but quite variable in their shape and size. This knowledge is now indispensable, at a time when endonasal microsurgery has become commonplace in ENT.

Adult↗

[Not Available].

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Equipment and Supplies↗

[Not Available].

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France↗

[Not Available].

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France↗

[Not Available].

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Amputation, Surgical↗

[Not Available].

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France↗

Electron microscopy of Cowdria ruminantium infected reticulo-endothelial cells of the mammalian host.

An electron microscopic study of structures suspected to represent a possible developmental cycle of Cowdria ruminantium in reticulo-endothelial cells of mice and ruminants is reported. After infection dense bodies increase in size and undergo division to form fragmented dense bodies. These in turn apparently sub-divide and become organized to give rise to mature "organisms". In none of these structures do limiting membranes separate the parasitic inclusions from the host cell cytoplasm. Present observations suggest that growth of the organism in reticulo-endothelial cells differs from that of chlamydial and rickettsial agents and somewhat resembles the replication of some viruses. Developmental stages observed after infection of ruminants with the Ball 3 strain of the heartwater agent are indistinguishable from those seen with the mouse adapted strain. These observations support the hypothesis that C. ruminantium released from reticulo-endothelial cells subsequently penetrates endothelial cells where further multiplication by binary fission occurs.

Animals↗