Biomedical subjects

J L Ribeiro

Publications and source records attributed to J L Ribeiro.

3 recordsLinked to original sources

PubMed2001

Structure of the X-phase of 38% brominated betaine calcium chloride dihydrate.

The structures of the high- and low-temperature phases of 38% brominated BCCD [betaine (trimethylammonioacetate) calcium chloride dihydrate], the latter being known as the X-phase, have been determined by single-crystal neutron diffraction at 295 and 20 K, respectively. The symmetry of the X-phase is described by the P2(1)2(1)2(1) space group. The distortion with respect to the high-temperature Pnma phase is characterized by anti-symmetric displacements of the betaine molecules as well as of the Ca octahedra. On the basis of a symmetry-mode analysis, we propose an interpretation of the direct phase transition that occurs around 80 K between these two phases.

Journal Article↗

PubMed1998

Impact of epilepsy on QOL in a Portuguese population: exploratory study.

OBJECTIVES: To develop an outcome measure of QOL (quality of life) for the Portuguese population; describe QOL in epileptics; analyse how QOL is affected by epilepsy and analyse how QOL is affected by patients' characteristics. PATIENTS AND METHODS: Study of a consecutive sample of 92 epileptics from an outpatient clinic, men and women, aged 15-65, having the basic education level. Firm diagnosis of epilepsy (with or without seizures) without other illness. A questionnaire based on ESI-55 and Health Insurance Experiment Short-Forms was used. Principal component analysis (orthogonal varimax) showed a solution explaining 55.6 of total variance. After the inspection, the 33 items were grouped into 5 sub-scales (dimensions). RESULTS: Results showed that QOL was poor for people with partial seizures. The best scores were found on patients now free from seizures. CONCLUSION: The QOL measure is sensitive to cultural differences, demographic and disease variables which could explain the results found.

Activities of Daily Living↗

PubMedDate not supplied

[Changes in cognitive function performance in patients after anesthesia].

This study evaluates the mental performance of 112 patients (ASA grade 1 and 2) submitted to Orthopaedic, Urologic, Gynecologic, General and ENT surgery in Santo Antonio General Hospital. These patients received different types of anaesthesia: General Balanced Anaesthesia--GBA (n = 80), Total Intravenous Anaesthesia--TIVA (n = 17) and Regional Anaesthesia--RA (n = 15). Cognitive function was tested using the mini mental state test (MMS), which was done 24 hours before and 24 hours after anaesthesia. There was a high correlation between pre and postoperative MMS scores (R = 0.94). Patients in the GBA group show a significant (p < 0.001) decrease in cognitive performance 24 hours after surgery in comparison to the preoperative test. No differences were observed between the pre and postoperative MMS tests in the TIVA and RA groups.

Adult↗