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Biomedical subjects

L Galan

Publications and source records attributed to L Galan.

6 recordsLinked to original sources
PubMed1994

High resolution quantitative EEG analysis.

High resolution spectral methods are explored as an alternative to broad band spectral parameters (BBSP) in quantitative EEG analysis. In a previous paper (Valdes et al. 1990b) regression equations ("Developmental surfaces") were introduced to characterize the age-frequency distribution of the mean and standard deviation of the log spectral EEG power in a normative sample. These normative surfaces allow the calculation of z transformed spectra for all derivations of the 10/20 system and z maps for each frequency. Clinical material is presented that illustrates how these procedures may pinpoint frequencies of abnormal brain activity and their topographic distribution, avoiding the frequency and spatial "smearing" that may occur using BBSP. The increased diagnostic accuracy of high resolution spectral methods is demonstrated by means of receiver operator characteristic (ROC) curve analysis. Procedures are introduced to avoid type I error inflation due to the use of more variables in this type of procedure.

Adolescent↗
PubMedDate not supplied

[Surgical treatment in osteochondritis of the femur head in children].

The goal of surgery in the femoral head osteochondritis of children is, in the cases progressing towards extrusion, to ensure a good coverage of femoral head. Under the age of 5-6 years, the evolution being more commonly benign, the surgical containment is rarely indicated. In the child over 7 years, the extrusion of femoral head being common, a surgical intervention for correcting it is necessary. This paper is based on a statistics on 36 children operated upon at the Clinic of Pediatric Surgery and Orthopedics of Iaşi between 1980 and 1990. Eighteen femoral osteotomies, 10 Chiari pelvic osteotomies and 8 triple pelvic osteotomies were performed. It is assumed that femoral osteotomy is rarely indicated and Chiari osteotomy is required for hip salvage when other techniques cannot be used. The triple pelvic osteotomy, when indicated, has to be used more frequently, leaving aside the reticences towards this method.

Child↗