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Biomedical subjects

J Lamoureux

Publications and source records attributed to J Lamoureux.

18 recordsLinked to original sources
PubMed1990

[Adaptation of currently used resins in prosthodontics].

This study is intended to detail the relative level of adaptation (at the hiatus palatinus) of five (5) acrylic resins used in partial and complete prosthodontics (Formatray, Orthodontic, Triad, Lucitone, Ivocap). These five (5) resins have been treated to five (5) different methods of conservation (in water at different temperatures, to air and to cold) to discover which of these methods are most likely to conserve the accuracy of adaptation one looks for in a resin.

Acrylic Resins↗
PubMed1990

Evaluation of vasospasm secondary to subarachnoid hemorrhage with technetium-99m-hexamethyl-propyleneamine oxime (HM-PAO) tomoscintigraphy.

Vasospasm of intracranial vessels is difficult to diagnose on clinical ground alone. Still, a clear diagnosis is important because it can impact on surgical timing; and also because it can help evaluate new treatments. Fifteen patients with sub-arachnoid hemorrhage secondary to aneurysm rupture were submitted to a total of 26 tomographic technetium-99m-hexamethyl-propyleneamine oxime (99mTc-HM-PAO) brain examinations that were correlated with temporally close (generally less than 24 hr) angiography or transmission computed tomography (TCT). Nine of 10 angiographically confirmed episodes of spasm and 6 of 6 infarcts seen on angiography or TCT were correctly diagnosed with 99mTc-HM-PAO. One normal scintigraphic exam was angiographically doubtful, one positive 99mTc-HM-PAO study was normal on angiography (sub-radiologic spasm?), one technically poor scintigraphy was positive for spasm on angiograms, and eight exams were normal for spasm with all modalities. We had agreement between tests in 23 of 26 series of exams (88%) obtained in 15 patients. We think that 99mTc-HM-PAO tomography should be useful for the evaluation of patients with suspected vasospasm.

Adult↗
PubMed1989

Reducing the radiation dosage in patients with a scoliosis.

A significant number of girls develop an adolescent idiopathic scoliosis and require repeated full-length radiographs of the spine. Since Nash's publication in 1979 [16], there has been considerable concern expressed about protecting them from excessive radiation, and particularly from the development of radiation-induced breast tumours. We present a study which compares the differences in radiation dose using different techniques, specifically, the use of a posteroanterior projection, very fast rare earth screens and progressive wedge-shaped filtration. The use of a posteroanterior projection reduced the sternal exposure by 98.9% and the breast skin exposure by 92%. A combination of all three techniques reduced the sternal exposure by 99.5%. We recommend that these should be used routinely to reduce the radiation hazard to children with an adolescent idiopathic scoliosis.

Adolescent↗
PubMed1979

[Osteomyelitis].

Explore the source record for details and available documents.

Child↗
PubMedDate not supplied

Shaft forearm fractures in children: intramedullary nailing with immediate motion: a preliminary report.

Nailing is a good solution for shaft forearm fractures in children who require surgery. A closed reduction is very often possible owing to the bent tip of the pins. The procedure avoids extensive dissection, unlike epiphyseal plates. When a nailing is performed, the distal approach for both bones is the most convenient, avoiding elbow pain on the proximal ulnar incision. Six children of 57 had unacceptable reduction following conservative treatment and underwent intramedullary fixation. An immediate mobilization was possible in all patients. We observed neither delays in union nor recurrent fractures. The range of motion was normal in the postoperative period and at the 1 year follow-up.

Bone Nails↗
PubMedDate not supplied

Dipyridamole testing compared to exercise stress for thallium-201 imaging in patients with left bundle branch block.

Because of numerous reports of false positive results with thallium-201 (Tl-201) stress testing in patients with left bundle branch block, the authors decided to evaluate another mode of coronary vasodilatation, dipyridamole, for the diagnosis of coronary atheromatosis. Nine patients were prospectively studied with stress and dipyridamole Tl-201 scintigraphy; both tests were performed within three to 79 days of one another. Five of the patients also had coronary angiograms (four within one year, one five years earlier). Four of the patients had normal results with both tests (two normal angiograms, two not performed); two had reversible septal defects with stress-induced coronary vasodilatation but normal dipyridamole studies (only one had an angiogram, which was normal); one patient had a fully reversible septal defect with stress and a fixed defect with dipyridamole (normal angiogram); one had a partially reversible septal stress defect which was fixed with dipyridamole; and one had a normal stress study but a reversible septal defect with dipyridamole (an angiogram performed five years earlier showed 30 to 40% stenosis of the anterior descending artery). Because it seems that dipyridamole produces fewer false positive results, it should be used instead of stress testing to induce coronary vasodilatation in patients with left bundle branch block.

Angiography↗
PubMedDate not supplied

Orthopaedic treatment of paediatric multiple trauma patients. A new technique.

In multiple trauma, skeletal injuries are generally responsible for long hospital stays, with concomitant nursing inconveniences and for most of the sequelae. A new operating technique has been perfected, especially adapted to paediatric traumatology: stable elastic rodding, precise and less aggressive technique. It avoids plastering and traction systems, and rapidly restores sufficient independence for a return to school. It is especially useful in multiple trauma patients, where nursing facilities and easy transport may be very helpful. The hospital regularly uses this technique for patients over six years old with femur fractures, tibia fractures associated with a contralateral lower limb injury, and forearm fractures where conservative treatment has failed.

Child↗