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Biomedical subjects

H Deramond

Publications and source records attributed to H Deramond.

At least 55 records · Page 3Linked to original sources
PubMed1983

[Exploration by high-resolution real-time ultrasonography of the parathyroid glands in 60 chronic hemodialysis. Preliminary results and comparison with other indices of secondary hyperparathyroidism].

Systematic study by high resolution real time ultrasonography of the parathyroïd glands unequivocally showed parathyroid hyperplasia in 13% of 60 patients on chronic hemodialysis. Hyperplasia was associated with greater severity of hyperparathyroidism, as demonstrated by subperiostal bone resorption and increased serum levels of alkaline phosphatase, parathormone and calcium. Correlation between ultrasonographic and surgical findings in 5 patients was excellent, and actual weights of removed hyperplastic glands were correlated to calculated volumes. The demonstration of hyperplastic parathyroid glands by ultrasonography was of great help for surgical indication in cases where the classical biochemical and radiological parameters were unavailable or of uncertain significance. In absence of hypercalcemia and/or of hyperphosphoremia which may hinder "medical parathyroidectomy" by vitamin D metabolites, ultrasonographic demonstration of hyperplastic glands represents an unresolved problem as to the choice of surgical or medical parathyroidectomy.

Adult↗
PubMed1981

[Management of the non traumatic dissecting aneurysm of the cervical portion of the internal carotid artery (author's transl)].

The spontaneous dissecting aneurysms of the internal cervical carotid artery are renowned unusual, as about fifty cases only are reported in the literature. About 18 cases of dissecting aneurysms, 5 of which operated on and 13 clinically and radiologically followed, the authors try to draw a management. This one is resolutely conservative because: 1. It is possible to expect the spontaneous evolution according to the radiological form of the dissection which becomes in the great majority of cases toward repermeability. 2. The exceptional cases evolving to the thrombosis can later have an extra-intracranial anastomosis. 3. The cases justifying a direct surgical approach are exceptional and the operatory decision is easily taken according to the radiological aspect. On the whole, this pathology seems less unusual than the literature leads to suppose and the spontaneous evolution is worth to be well known because it conditions the management.

Adult↗
PubMed1979

[Retrograde carotid approach to aortography in neonates and babies: technique and results in 21 cases (author's transl)].

A new radiological technique is described for opacification of the thoracic aorta in neonates and babies weighing less than 10 kg. The exploration method is described: injection of a contrast medium after retrograde carotid puncture, and increased endothoracic pressure. The results obtained in 21 babies aged from 3 to 157 weeks, and weighing 3.3 to 10 kg are discussed. Radiographic results were excellent in 17 cases, satisfactory in 3 cases, and only moderate in 1 case. The procedure was perfectly well tolerated, and enabled visualization of an arterial canal in 4 cases, stenosis of a Blalock-Taussig anastomosis in 1 case, aortic stenosis in 7 cases (2 tubular hypoptasias, 1 coarctation, 3 segmentary interruptions, 1 recoarctation), coronary-cardiac fistula in 1 case, and a normal aorta in 9 cases. The authors review the advantages, inconveniences, and risks of the other methods of opacification of the thoracic aorta in neonates and babies. They conclude that when right cardiac catheterization cannot give, in babies under 10 kg of weight, a satisfactory radiological assessment of the thoracic aorta in the following clinical conditions: coarctation syndrome, badly tolerated left-right shunt, or possible abnormality of the aortic arch or coronaries, the technique of opacification of the thoracic aorta by retrograde puncture of the common carotid is the best radiological method for establishing a definite diagnosis.

Age Factors↗
PubMedDate not supplied

Percutaneous vertebroplasty: state of the art.

Vertebroplasty is an effective new radiologic procedure consisting of the percutaneous injection of a biomaterial, usually methyl methacrylate, into a lesion of a vertebral body. This technique allows marked or complete pain relief and bone strengthening in most cases. The principal indications for vertebroplasty are osteolytic metastasis and myeloma, painful or aggressive hemangioma, and osteoporotic vertebral collapse with debilitating pain that persists despite correct medical treatment. Radiography and computed tomography must be performed in the days preceding vertebroplasty to assess the extent of vertebral collapse, the location and extent of the lytic process, the visibility and degree of involvement of the pedicles, the presence of cortical destruction or fracture, and the presence of epidural or foraminal stenosis caused by tumor extension or bone fragment retropulsion. Leakage of methyl methacrylate during vertebroplasty may cause compression of adjacent structures and necessitate emergency decompressive surgery; thus, the procedure should be performed only in a surgical center. The decision to perform vertebroplasty should be made by a multidisciplinary team because the choice between vertebroplasty, surgery, radiation therapy, medical treatment, or a combination thereof depends on a number of factors. Radiologists need to be aware of the various indications for vertebroplasty and of potential future developments and applications of the procedure.

Hemangioma↗
PubMedDate not supplied

An ex vivo biomechanical evaluation of a hydroxyapatite cement for use with kyphoplasty.

BACKGROUND AND PURPOSE: Previous ex vivo biomechanical studies have shown that kyphoplasty with polymethylmethacrylate cement increases vertebral body (VB) strength and restores VB stiffness and height after compression fracture. The purpose of the current study was to determine if a hydroxyapatite cement used as a void filler during kyphoplasty provides mechanical stabilization similar to that of a polymethylmethacrylate cement. METHODS: Simulated compression fractures were experimentally created in 33 osteoporotic VBs harvested from female cadaver spines. VBs were assigned to one of three groups: 1) kyphoplasty with a custom mixture of Simplex P; 2) kyphoplasty with BoneSource; and 3) no treatment. The kyphoplasty treatment consisted of inserting a balloon-like device into the VB via both pedicles, inflating the tamp, and filling the created void with Simplex P bone cement or BoneSource. VBs in the no-treatment group received no interventions. Pre- and posttreatment heights were measured, and the repaired VBs were recompressed to determine posttreatment strength and stiffness values. RESULTS: Kyphoplasty with altered Simplex P restored strength, whereas kyphoplasty with BoneSource and the no-treatment protocol both resulted in significantly weaker VBs relative to initial strength. All treatments resulted in significantly less stiff VBs relative to their initial condition. All VBs lost significant height after initial compression, but a significant amount of lost height was restored by kyphoplasty with either cement. CONCLUSION: Kyphoplasty with either cement significantly restored VB height. Kyphoplasty with altered Simplex P resulted in stronger repairs than did no treatment or kyphoplasty with BoneSource.

Aged↗
PubMedDate not supplied

[Central neurocytoma: case report].

The authors report a case of intraventricular tumor. The tumor was initially misdiagnosed as an oligodendroglioma but later proved to be a central neurocytoma. The imaging and histopathological features are reviewed. The immunopositivity allows a diagnosis of neurocytoma. Prognosis is favorable following total surgical resection, with low recurrence rate.

Adult↗