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J Lamoureux

Publications and source records attributed to J Lamoureux.

At least 19 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↗
PubMed1987

Tricho-rhino-phalangeal syndrome type I in a Belgian family.

We report three cases of tricho-rhino-phalangeal syndrome (TRPS) type I in a Belgian family. They presented typical characteristics such as a pear-shaped nose, and short, deformed fingers with cone-shaped epiphyses of some middle phalanges of the hands. Hair growth was practically normal in our patients, except for some narrowing of the lateral part of the eyebrows. Perthes-like hip dysplasia was documented in two of our cases. The proband presented at the age of 31 with Kienböch's disease of the right wrist. Blood and urine analysis showed no clear anomalies. In this patient, echography revealed a renal cyst containing a stone. The relationship of these findings to TRPS is discussed.

Adult↗
PubMed1987

[Hepatobiliary scintigraphy using 99m Tc-DISIDA and obstructive cholangiopathy in children].

Technetium 99m-labeled diisopropyl iminodiacetic acid (99m Tc-DISIDA) hepatobiliary scintigraphy of 26 patients with pathologically proven infantile obstructive cholangiopathy are retrospectively studied according to two types of criteria. Those of type 1 consider 1) hepatocyte clearance 2) hepatobiliary transit time and 3) visualisation of intestinal activity. For biliary atresia, sensitivity of 88.2%, specificity of 88.9%, positive predictive value of 93.8% and negative predictive value of 80.0% were obtained. For neonatal hepatitis, those parameters were 57.1%, 94.7%, 80.0% and 85.7% respectively. Criteria of type 2 identify only biliary atresia. They consider 1) presence or absence of intestinal radioactivity through 24 hours and 2) birth weight. Sensitivity, specificity, positive and negative predictive values were 88.2%, 88.9%, 93.8% and 80.0% respectively. Even if all these values are inferior to many reported in literature, we consider that the two types of criteria are relatively sensitive and specific to detect biliary atresia. Even through there are a few false negatives, biliary scintigraphy does remain one of the most important diagnostic tests in the context of biliary atresia.

Biliary Atresia↗
PubMed1979

[Osteomyelitis].

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Child↗