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Biomedical subjects

M Guillot

Publications and source records attributed to M Guillot.

At least 145 records · Page 8Linked to original sources
PubMed1981

[Method for studying internal tensions at the intervertebral junction in extreme postures. Description of experimental material and preliminary results].

The authors describe a device for measuring the resultant tensions existing at the intervertebral junction (or its constitutive elements) in all spine attitudes. The reported method has been applied to the L4-L5 junction of a spine taken from the corpse of a 50 years old man. Although incomplete, the results suggest the following points: --the L4-L5 intervertebral junction seems to be very deformable, particularly in the sagittal plane; --the intervertebral disk is probably an elastic support which sustains shear stresses during flexion, extension and bending movements in the frontal plane; --during flexion, articular processes seem to be movement leaders as well as supports; --ligaments seem to play a small mechanical role, but their proprioceptive function seems essential.

Biomechanical Phenomena↗
PubMed1981

[Study of the talus and calcaneus using microdurometry, penetrometry and compression].

The authors give the results of various methods such as hardness micrometry, indentation tests and the radiographic study of fracture patterns, which they have applied to the talus and to the calcaneus. It appeared to them that: --these techniques outline the phenomenon of rupture behaviour of both talus and calcaneus; --the talus behaves as a fragile type of material whereas the calcaneus is of the intermediate type. The authors therefore think that these methods can be of great interest in a better understanding of the biomechanical properties of bone.

Biomechanical Phenomena↗
PubMed1980

[Continuous enteral feeding in pediatric nephrology. Long-term results in children with congenital nephrotic syndrome, severe cystinosis and renal failure (author's transl)].

This is the report of the results obtained with continuous enteral feeding in congenital nephrotic syndrome (3 cases), cystinosis (3 cases) and renal failure (3 cases). Ages of patients at the beginning of treatment ranged from 10 days to 3 years. Enteral nutrition was given for periods ranging from 4 to 37 months; mean energetic intake was 116% of the levels recommended according to developmental age and protein diets were 138%; 115% and 84% of the recommended amounts in nephrotic syndromes, cystinosis and renal failure, respectively. This treatment obtained the survival of most patients. In congenital nephrotic syndromes, growth improved clearly with acceleration of the curve and restoration of plasma albumin level. In cystinosis, a better fluid and electrolyte balance was obtained and growth curve sometimes improved in a spectacular fashion. Finally, in renal failure, effect on growth was favourable in 2 cases and nil in the third: these findings show that normalization of energetic intakes does not induce normal growth in children with uremia.

Child, Preschool↗
PubMed1980

[Anatomy of the right atrioventricular valve (valva atrio-ventricularis dextra or valva tricuspidalis). Description of a new type of chordae: the mixed chordae].

The authors, continuing their work concerning the tricuspid valve which was communicated at the Fourth European Anatomical Meeting (Bále, 1977), now present a study of twenty anatomical preparations according to the Mac ALPINE technique of perfusion-fixation, giving to the preparation a morphology comparable to that of the heart at the end of the diastole. The present work consists in a descriptive and morphological study of one type of tendinous cord, not described until now, and denominated mixed cord. It defines itself by its valvular insertions which are situated on the four areas of the tricuspid valve described by SILVER and al. It is a cylindric tendinous cord, always ramified either into two branches which are in turn greatly ramified, or into a fan shaped spreading. Each ramification is attached to the valve by an expansion which is either perpendicular or parallel to the ring. This work specifies: the number of tendinous cords, their distribution to the three cusps of the tricuspid valve, the number of their ramifications and their valvular insertions.

Aged↗
PubMed1979

[Coumarin-induced fetal abnormalities and stippled epiphyses].

The ability of most anticoagulants (except heparin) to cross the placenta and the consequent hemorrhage in the fetus has been recognized for some time (3). A teratogenic effect specifically attributed to warfarin sodium is a more recent finding (7, 9, 10). The following is a case report of a newborn with clinical and roentgenographic features similar to the cases reported previously.

Abnormalities, Drug-Induced↗
PubMed1979

[Electrical study and functional approach to the peroneal muscles].

After an attempt to systematize and to give a terminology to the movement of the foot, the authors have studied the role of the muscle peroneus longus and muscle peroneus brevis. This work includes a brief anatomical reminder, and an analysis of electrostimulation and of electromyography. It appears to them that:--the muscles peroneus longus and peroneus brevis have no motor action on the talocrural articulation, but they are synergic with foot flexor muscles as well as with foot extensors, giving lateral stability to this articulation, avoiding varus deviation on a weight bearing limb;--the muscle peroneus longus deepens the plantar arch, enabling impulsion to stance when walking, avoiding weight bearing of the foot on its lateral side. Lastly, the authors think that plastic operations using the muscle peroneus brevis, for rupture of the Achille's tendon, that are performed on an athlete, are not prejudicial to the lateral stability of the foot since a quite inactive muscle is involved.

Electrophysiology↗
PubMed1979

[Anatomical study and systematization of veins in the foot].

From the dissection and the injection of the foot veins on 70 anatomical pieces, the authors have found the 4 systems usually described:--Lejar's plantar venous rete;--the supra-fascial dorsal venous rete;--the dorsal veins of the foot;--the median and lateral plantar veins. All these systems communicate largely with one another and are practically without any valvula. Among the most interesting systems, one should notice the closely woven plantar rete predominating at the level of the anterior and posterior weight-bearing points, and the importance of the muscular plantar veins close to the weight-bearing points. From those anatomical data 3 conclusions follow: 1) the major importance of the superficial venous drainage in comparison with the deep one, which makes one think of the preponderant role of that system as venous motor at the level the weight-bearing points, while walking; 2) the easy opacification of all those systems in phlebography; 3) the uselessness of any complementary surgical action i the submalleolar regions during the cure of varices.

Foot↗
PubMed1977

Changes of serum gonadotropin concentrations in premature babies submitted to phototherapy.

In order to determine if phototherapy was influencing any change in plasma gonadotropin levels, we have compared a group of 8 premature infants (4 males and 4 females) who have been treated with phototherapy because of jaundice, to a control group of 6 premature infants who did not require phototherapy. During the third and fourth week of life, luteinizing hormone (LH) and folicule stimulating hormone (FSH), increased simultaneously in a significant range in phototherapy treated females. In the group of treated males, LH but not FSH increased significantly. Constant phototherapy and/or the sudden stopping of the treatment in the jaundiced premature newborn female is responsible for a marked and transient elevation of gonadotropins. A clear mechanism of the observed phenomenon with pathways including the retina, pineal gland and hypothalamus, is not apparent.

Female↗