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Biomedical subjects

M Cortés

Publications and source records attributed to M Cortés.

49 records · Page 3Linked to original sources
PubMed1977

Inorganic phosphorus measurement: an improved method.

An improved micromethod for the determination of inorganic phosphorus in serum and urine is outlined. The procedure requires no deproteinization and yields a stable colour. The new formulation proposed avoids the pitfalls of other techniques. The method is both accurate (recovery 99-100.4 percent) and precise (C.V. 2.19 percent).

Drug Interactions↗
PubMedDate not supplied

[Simultaneous location of non-palpable breast neoplasms and sentinel node (SN) study by radioisotopic techniques].

OBJECTIVE: To obtain correct location of non-palpable breast lesions, with high suspicion of malignancy and detection of SN by radiosotopic techniques. MATERIAL AND METHODS: Thirty-one patients whose ages ranged from 35 to 79 years, with non-palpable breast lesions detected by mammography and/or ultrasonography were studied. All the patients were diagnosed of breast cancer and treated with primary chemotherapy. All the patients underwent total axillary dissection. At 24 hours of the intervention, all patients received one dose of 37 MBq (1 mCi) of 99mTc labeled macroaggregated albumin (MAA) in the center of the lesion by ultrasonographic guide. Scintigraphic images were performed in anterior and lateral projections (in prone decubitus with hanging breast) to verify the correct location of the radiopharmaceutical. After, a study of the SN was performed by subdermal administration of an 18 MBq (0.5 mCi) dose of 99mTc labeled nanocolloid. The SN site was labeled on the skin with indelible ink. The intrasurgical site of the breast lesion and SN was performed using a gamma detector probe. Correct placement of the intralesional radiopharmaceutical, existence of disease free borders and histological study of SN were performed by the pathologist in the surgical act. The differed pathology study was performed with hematoxilin-eosin and immunohistochemistry. RESULT: In 29 of the 31 lesion sites, there was good placement of the radiotracer (93.5 %). There was 1 case of contamination of the needle pathway and another that did not coincide with the lesion, due to poor placement. Location of the SN was 96 % in the axilla and 4 % in axilla and internal mammary chain. The SN was located in surgery in 28/31 patients (90 %). CONCLUSION: Simultaneous radioguided location of the hidden breast lesions and sentinel node is a simple method, which is well tolerated by the patients and can be done in a single operation act.

Adult↗
PubMedDate not supplied

[Perinatal mortality in Spain. The need of an epidemiologic approach].

Autonomovi Communities perinatal mortality evolution in Spain from 1975 to 1983 is studied aimed at the assessment of existing inequalities in our country concerning this important public health problem. Although a positive evolution has been reported in all of them, differences in their mortality figures have rosen, showing higher rates those communities ranking lower socioeconomic indicators. Epidemiological analysis is needed so as to planning health activities as well as to study social processes responsible for this problems. Embodiment of social services into existing medical services is proposed, especially in Communities where the "sociodemographic disadvantage" is an essential problem. An optimum action in public health throughout the perinatal period world require a comprehensive analysis of the health situation assessing the problems which produce a greater number of survivors with serious sequalae as a result of a lower mortality.

Humans↗
PubMedDate not supplied

[Environmental exposure factors and the concentrations of blood lead in Mexico City children].

Risk factors that contribute to high blood lead concentrations were determined in 113 infants, aged 3 to 7 years old, that attended pediatric consultation at the American British Cowdray Hospital (ABC) from May 1991 to October 1992. The range of blood lead concentrations was 4 to 45 micrograms/dl, with an average value of 15.6 micrograms/dl (DE = 7.0), and a geometric mean of 14.2 micrograms/dl (IC 95% = 11.9-16.5). Seventy six percent of the children presented blood lead concentrations of over 10 micrograms/dl. The main predictors of blood lead levels were the use of glazed pottery for cooking rice (ANOVA, p = 0.0000) and the storage of food in glazed pottery (t-test, p = 0.005). There was a significant association between the use of glazed pottery for cooking rice and blood lead concentrations (tendency p = 0.000). The attributable risk of this population due to the use of glazed pottery was 81 per cent. This study sustains the need to develop and enforce public health policies for programs of lead poisoning prevention.

Adolescent↗