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Biomedical subjects

A Ducasse

Publications and source records attributed to A Ducasse.

At least 91 records · Page 5Linked to original sources
PubMed1985

[Participation of the external carotid artery in orbital vascularization].

The authors present the result of 70 dissections of the arterial vascular system of the orbit. The craniofacial junction is an important location because of possible anastomosis between the two carotid systems. These anastomosis can be situated at the meningeal level, palpebral and also inside the orbit cavity. The embryology of the encephalic vascular supply allows one to explain the possible dual origin of the orbital blood supply. This work shows the frequent participation of the external carotid artery to the orbital vascularisation by mean of three collateral branches: the infraorbital artery, a branch of the maxillary artery, partakes in the arterial supply of the inferior oblique muscle in 85,7% of cases. Usually, the inferior muscular artery which is a branch of the ophthalmic artery also partakes in this supply. In very exceptional cases (2 of 70) the infraorbital artery alone supplies the muscle. the lacrimal artery which can come from the external carotid system either from the middle meningeal artery or from the anterior deep temporal artery. This meningolacrimal artery can be either a solo lacrimal artery (17,14% of cases) or be associated with another classical lacrimal artery, from the ophthalmic artery (11,43%). These lacrimal arteries coming from the external carotid system have the following characteristics: they are thinner than classical arteries, they penetrate the orbit by their own orifice, the Hyrtl canal, and they can participate in the muscular vascularisation, especially of the lateral rectus. When these arteries are unique, most often they are encountered when the ophthalmic artery has undercrossed the optic nerve.(ABSTRACT TRUNCATED AT 250 WORDS)

Arteries↗
PubMed1984

Anatomical bases of echography of the liver. Applications in peroperative echography.

Peroperative echography is bound to play an increasingly important role in indications for hepatic exeresis, particularly as this type of surgery is anatomical and patterned. It is not easy however to have a clear idea of the stereo-spatial representation of one segment or another when the liver is in situ. The aim of this investigation is to define precisely, with the help of echographic sections, the topography of the different hepatic segments, thereby enabling the surgeon to carry out a complete and systematised exploration. It provides the surgeon with information which has not been accessible until now with classic peroperative explorations.

Hepatic Veins↗
PubMed1984

The arteries of the lacrimal gland.

The vascularization of 70 lacrimal glands was studied by orbital dissection subsequent to injection of the arterial bed with red-dyed latex. The origin, diameter and collateral branches of the lacrimal artery and its anatomical relations were investigated. Three types of lacrimal vascularization were seen. In the type I variety, the lacrimal artery originates from the ophthalmic artery and runs along the margin of the rectus lateralis muscle. In this case, the lacrimal artery is a major source of vascular supply to the muscle. In the type II variety, the lacrimal artery originates from the middle meningeal artery. In this case, the lacrimal artery is only a very modest source of vascular supply to the muscle. The type III variety features two lacrimal arteries vascularizing the lacrimal gland. One of the arteries originates from the ophthalmic, while the other arises from the middle meningeal. In this case, the lacrimal gland is the site of an intraorbital anastomosis between the internal and external carotid systems. The lacrimal gland is innervated by the lacrimal nerve and the lacrimal rami of the maxillary nerve. Preliminary results regarding certain morphological features of the lacrimal nerve are reported in this paper.

Arteries↗
PubMed1984

Anatomical basis for the use of the pectoralis major myocutaneous flap in reconstructive surgery.

The aim of this study was to clearly identify the vascularization of the pectoralis major myocutaneous flap owing to the importance of its use in the surgery of cervicofacial cancer. This work was based on the study of 40 pectoralis major muscles. The anatomical specimens were dissected after non selective injection of red latex followed by selective injection via the arterial pedicle of the muscle and finally injection of the cutaneous territory supplied by this pedicle. This study confirms the existence of a main arteriovenous pedicle vascularizing the donor site. The pedicle, lying at the deep surface of the pectoralis major, originates from the thoracoacromial artery. Rotation of the myocutaneous flap is achieved around this pedicle, the latter ensuring the survival of the flap. Participation of other arteries in the vascularization of the pectoralis major myocutaneous flap was also noted in this study.

Facial Neoplasms↗