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Biomedical subjects

J Hureau

Publications and source records attributed to J Hureau.

At least 73 records · Page 4Linked to original sources
PubMed1985

[Study of atrial conduction tissue in the 17 mm V-C human embryo. Morphological contribution to the pathogenesis of sinoauricular node dysfunction].

Is there a specialised conduction pathway connecting the sinoatrial and atrioventricular nodes within the crista terminalis? As lesions of this zone can cause sinus node dysfunction and the sick-sinus syndrome, we decided to study this structure at the beginning of its embryonic development. Serial 10 micronthichness transverse sections of a 17 mm vertex-coccyx (Stage 19) human embryo were studied by light microscopy, anatomical reconstruction (Born) and morphometry. The region of the sinus venosus and venous valves, of the superior vena cava and the atrioventricular region were drawn and reconstructed with 150 X magnification by Born's method using wax plates of the following dimensions: 175 X 95X 1.5 mm. The volume of the region of the sino-atrial node was determined by multiplying the thickness of the sections by the surface of the region (measured by planimetry using the point counting method); its value was 15.4 X 10(6) microns3 with an antero-posterior diameter of 490,0 micron. These results show that this region is already proportionally larger in Stage 19 embryos. Reconstruction showed the sinoatrial node region to be a round bulge with a groove on either side: that of the sulcus terminalis and the superior vena cava on the left and the same vein with the mesocardium on the right. The right venous valve connects this zone with the interatrial septum and comprises two distinct cellular components, on derived from the atrial wall and the other from the muscle of the sinus venous. The artery fo the sinoatrial node was identified.(ABSTRACT TRUNCATED AT 250 WORDS)

Arrhythmias, Cardiac↗
PubMed1984

Anatomical bases of kidney transplantation in man.

Kidney transplantation is a well codified operation. The way to reduce surgical complications (urological and vascular) lies in a precise knowledge of the anatomy of the renal pedicle, as well as of the ureter and its vascularization. The choice of a site for implantation depends on anatomical arguments which aim at using a well vascularised ureter, and so a short one, and a renal pedicle without tension, with therefore a long or extended renal vein. A privileged site for transplantation is the right or left iliac fossa; transplantation in the lumbar fossa remains exceptional.

Histological Techniques↗
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 of the surgical approach to the membranous urethra.

The pars membranacea is the short segment of the urethra traversing the floor of the perineum. The main anatomical obstacles encountered in the approach to the membranous urethra are the perineal body posteriorly, and the deep dorsal vein of the penis and preprostatic venous plexus, anteriorly. These obstacles must be borne in mind when performing a surgical approach to the membranous urethra. The perineal body is the main obstacle to the perineal approach and can be avoided by incision of the sagittal raphes (anobulbar and rectourethral raphes) posterior to it and up to the apex of the prostate. When the trans-symphysial or transpubic approach is used, detachment of the suspensory ligament and roots of the penis allows exposure of the preprostatic venous plexus whose inferior part lies over the membranous urethra.

Abdomen↗
PubMed1984

Anatomical basis of total prostatocystectomy in man.

In the first part of this paper special emphasis is given to the anatomy of Denonvillier 's fascia which is derived from the prostatic capsule and covers the seminal vesicles, and to the preprostatic veins. In the second part devoted to the surgical technique of total prostatocystectomy the authors propose that the vesicoprostatic unit be freed by dissecting posterior to Denonvillier 's fascia. It is also proposed that the membranous urethra be sectioned prior to performing hemostasis of the preprostatic veins.

Fascia↗
PubMed1984

[The medio-femoral approach].

The authors report a series of thirty A. profunda femoris dissections by anterior approach: the medio femoral way, which is enabled to isolate an arterial segment of six centimeters.

Aged↗
PubMed1983

[Surgical approach to the 3rd segment of the vertebral artery by a paramedian posterior route].

Following an anatomical study of the lateral suboccipital region, the authors have devised an approach to the third segment of the vertebral artery, from C2 to the foramen magnum, which enabled them to treat an arteriovenous fistula in C1 while preserving the vertebral artery. The different operative stages and anatomical features are described. The simplicity and safety of this approach should encourage surgeons to use it.

Arteriovenous Fistula↗
PubMed1982

[Aorto-iliac microbridge by continuous suture in the rat].

We have performed micro-anastomoses by continuous suture technic: --circular suture of an aorta with 9/0 and with 10/0 Vicryl three (90% permeability); --next we performed an aortic-iliac bypass thanks to a carotid graft (70% permeability). The verification was carried out by injection of the complete arterial system with solidifying agent, and we obtained an arterial fitting after corrosion by the mean of hydrochloric acid.

Animals↗
PubMed1981

[Attempt at defining a pyelocaliceal system. Application to partial nephrectomy].

A comparative study of the pyelo-caliceal segmentation of the kidney and the arterial intra-parenchymal segmentation has been realised from the analysis of 60 plastic molds of the pyelo-caliceal system from which 42 were also molds of the arterial and venous systems (Fig. 8). These molds were obtained through injection with Rhodopas, then corrosion by hydrochloric acid. Their analytical study concludes to the existence of a pyelo-caliceal systematization and particularly of an intra-parenchymal arterial segmentation that corresponds to the pyelo-caliceal arborization.

Aged↗
PubMed1980

[Internal thoracic vessels: importance in microsurgery].

The internal thoracic vessels were studied in seventy adult fresh corpses. The left and right vessels were studied so as to precise symmetry relating to the different characters. After injection of coloured latex, the arteries and veins were skeletonized. The origin, the caliber, the length, the connections with the sternal side, the ending were specified. The origin and the ending of these vessels are variable. A statistical study specifies these measures. In the second intercosal space a great contancy of these vessels was observed which was confirmed by angiography. They are used at this level to revascularize the subcutaneous esophagoplasties. The internal thoracic artery can be skeletonized by a right thoracotomy and allowed to revascularize a free jejunal graft for reconstruction of the upper thoracic esophagus.

Adult↗
PubMed1980

[Anatomical study of different modes of anastomosis between the facial artery and ophthalmological artery at the medial angle of the orbit (author's transl)].

In 21 autopsy specimens, we performed latex injection, and studied the rate and the diameter of the anastomosis between the ophthalmic artery and the facial artery: we find 26 cases in 42 face-sides, 60 %; which can supply rapidly a circulatory insufficiency. The anastomosis which go to the ophthalmic artery from the others branches of the external carotid are less frequent.

Arteries↗
PubMed1980

[Arterial vascularization of the articular processes of the cervical spine].

Two cases of ischaemic necrosis of an articular process of cervical vertebrae, which have been surgically tested, have led the authors to study the blood supply of this part of the vertebral column by means of injections, dissections and Xray sections. At each level they find a double arterial supply: - the internal face of the articular process is supplied by the vertebral artery and the ascending cervical artery: - the external face is supplied by the vertebral artery, the ascending cervical artery and the deep cervical artery.

Angiography↗
PubMed1980

[3-dimensional photo-elastometric study of the patella (knee cap). Methodology and initial results].

Thanks to the photo-elastic method, the authors have described the disposition of the quadricipital tensile stresses in the human patella. Photo-elasticity allows the study of the relations between birefraction and stresses which exist in a transparent medium. Up to now, all the studies have been made on a plane model. The original feature of this study lies in the use of a three-dimensional model which, better than any plane photo-elasticimetry, makes it possible to display bone stresses in the three-dimensional space. After reminding some fundamental data, the authors describe the methodology and give the first qualitative results: in a frontal plane, tensile stresses are localised in the anterior two-thirds of the patella; on the contrary, pressure stresses can be observed in the posterior third. So the patella moves forward the tensile stresses of the knee.

Biomechanical Phenomena↗
PubMed1979

[Peptic oesophagitis and carcinoma of the lower third of the oesophagus: report of 7 cases (author's transl)].

The authors report seven cases of carcinomas of the lower third of the esophagus developed on lesions of peptic esophagitis. These lesions precede the carcinoma. They can be real precancerous states and even in situ carcinomas whose evolution over several years could be proved indeed. They argue about the therapeutical indications in peptic esophagitis considering not only that such a cancerous transformation is always possible but also the fact that a surgical ablation is always serious.

Adenocarcinoma↗
PubMed1979

[Retroperitoneal gas images following subperitoneal hollow viscus rupture (author's transl)].

Three cases of traumatic rupture of a subperitoneal hollow viscus are reported : two duodenal lesions and one rectal wound. Early diagnosis was possible in all three cases by the recognition of retroperitoneal gas on simple radiographs of the abdomen, which was evidenced by images containing air bubbles, which were also fasciculated and fairly fixed. They were unilateral, on the right side, and usually associated with disappearance of the psoas shadow in duodenal injuries. Rectal perforation produces a bilateral distribution of the retroperitoneal gas, which extends to the subperitoneal fat and the posterior extraperitoneal space, according to the amount of effusion.

Adolescent↗