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Biomedical subjects

P Fuentes

Publications and source records attributed to P Fuentes.

At least 109 records · Page 6Linked to original sources
PubMed1990

[Gastroesophageal reflux and respiratory manifestations: diagnostic approach, therapeutic indications and results].

The authors report a study of 140 patients presenting with a non-allergic respiratory tract disease (121 cases of asthma--19 cases of spasmodic cough). Gastro-oesophageal reflux was detected by 24-hour pHmetry in 86 of these patients. In 34 of them (i.e. 40% of cases), the gastro-oesophageal reflux appeared to be responsible for the initial respiratory tract symptoms. These 34 patients were submitted to a therapeutic trial of high dose anti-H2 therapy for at least two months. Only those patients in whom a marked improvement or even complete resolution of the respiratory tracts symptoms was observed underwent anti-reflux surgery. Out of the 13 patients undergoing surgery, there were two failures and 11 good results after a follow-up of more than 18 months.

Asthma↗
PubMed1990

[Pleural fibroma: apropos of a case].

The authors report a case of a pleural fibroma occurring in a 72 year old woman. The tumour presented with both an osteoarthropathy and hypoglycaemia. An X-ray revealed an abundant associated pleural effusion. Immune studies were positive for the presence of vimentin and negative for keratin, as occurred in this case, were in favour of a pure fibroblastic origin for these tumours.

Aged↗
PubMed1990

[Preoperative staging of central bronchopulmonary cancer. X-ray CT-MRI-pulmonary digital subtraction angiography and surgery].

In order to evaluate the reliability of medical imaging methods in the assessment of mediastinal invasion by lung cancers, a prospective study was conducted in 30 patients undergoing preoperative computed tomography (CT), magnetic resonance imaging (MRI) and pulmonary digital subtraction angiography. MRI improved the sensitivity of detection of surgically confirmed mediastinal lymphadenopathy, but its specificity in relation to histological results was poor and identical to that of CT. In terms of extension to vascular structures, MRI and CT gave comparable results for the pulmonary artery and vein with two false positives for the pulmonary veins and left atrium with the two methods. MRI was found to be superior to CT for the detection of invasion of the aortic arch. Digital subtraction angiography is not as reliable as the other two modalities, particularly for extension to the pulmonary vein for which it was found to be technically inappropriate. By means of sagittal and frontal scans, MRI was therefore found to be more effective than CT for examination of the subcarinal region and aorto-pulmonary window. In contrast, the persistence of false positives with the two methods and the impossibility of distinguishing between inflammatory lymph nodes and neoplastic lymph nodes means that thoracotomy can never be contraindicated on the basis of the results of imaging alone.

Aged↗
PubMed1989

Utilization of benzodiazepines in Chile during 1982-1986.

The consumption of benzodiazepine drugs (BDZ) in Chile in the period 1982-1986 has been studied by the DDD method. National use was assessed using drug import forms as a source of information, assuming that the total amount imported was manufactured and consumed in the same year. The utilization did not show a constant pattern, being 32.7, 33.6, 50.2, 34.9, and 31.3 DDD 1000 per inhabitants per day in 1982, 1983, 1984, 1985 and 1986, respectively. During the study period, diazepam was the most commonly used agent amongst anxiolytic BDZ, reaching a peak of 27.1 DDD per 1000 inhabitants per day in 1984, and flunitrazepam was the most popular hypnotic, attaining its maximum in 1986 (6.4 DDD per 1000 inhabitants per day). The use of BDZ at community pharmacy level was also evaluated, employing the International Marketing System (IMS) as the source of information. At that level the pattern of utilization showed a constant increase during the study period, being 14.9 and 25.8 DDD/1000 inhabitants/per day in 1982 and 1986, respectively. In community pharmacies the anxiolytic BDZ most often consumed was diazepam (maximum 9.1 DDD per 1000 inhabitants per day in 1985), and the commonest hypnotic was flunitrazepam (peak 6.0 DDD per 1000 inhabitants per day in 1986). National consumption of BDZ appeared higher and more variable than use at the community pharmacy level, but in both there was greater usage of anxiolytic than of hypnotic BDZ, and diazepam and flunitrazepam were the most popular agents.

Anti-Anxiety Agents↗
PubMed1989

Primary sequence of Xenopus laevis Na+-K+-ATPase and its localization in A6 kidney cells.

Polyclonal antibodies raised against the alpha- and beta-subunits of amphibian kidney Na+-K+-ATPase were used to screen an expression library from Xenopus laevis kidney epithelial cells (A6 cell line). cDNAs coding for each Na+-K+-ATPase subunit were identified and used to isolate near full-length cDNAs. The complete nucleotide sequence and the deduced amino acid sequence were determined. The alpha-subunit is an alpha (alpha I)-isoform. The alpha- and beta-subunits are more closely related to the mammalian and avian than the fish sequences. Antibodies raised against the fusion proteins produced by the two clones served to immunoprecipitate proteins from biosynthetically labeled or selectively surface-radioiodinated A6 cells grown on a porous substrate. The alpha- and the beta-subunits of Na+-K+-ATPase were found associated early in the course of biosynthesis and were restricted to the basolateral plasma membrane.

Amino Acid Sequence↗
PubMed1989

[Surgical treatment of benign laryngotracheal stenosis. Apropos of 12 cases].

The authors report a series of twelve benign laryngotracheal strictures. In almost every case, these lesions were secondary to tracheal intubation and consisted of extensive, circumferential and almost complete stenosis. All were treated surgically. The authors obtained enlargement of the airway be means of an interposed cartilaginous graft and an intraluminal prosthesis which was left in place. In nine cases, this procedure was combined with posterior cricotomy. One eight month old infant died during the postoperative period. Ten patients had an uneventful postoperative course with a satisfactory anatomical and functional result.

Adolescent↗
PubMed1988

[Inoperable cancer of the esophagus: preliminary results of combined chemotherapy (5-fluorouracil-cisplatin) and radiotherapy].

The aim of this study was to appreciate the tolerance and efficacy of a new nonoperative therapy for inoperable esophageal squamous cell carcinoma based on chemotherapy (5FU-cisplatinum) and concomitant splitcourse radiation therapy. Twenty five symptomatic patients (24 males, 1 female, mean age: 59 yrs, range: 41-72 yrs) were included. Five had 2 esophageal carcinoma, 5 an associated upper respiratory tract tumor and 2, relapse after surgery. Nine patients had a tumor limited to the esophagus (stage I or II) but were considered at high surgical risk. Sixteen had stage III disease with mediastinal involvement in 13 cases, nodal involvement in 4 and distant metastasis in 7. Treatment consisted of 2 cycles of chemotherapy with 5-FU (1 g/m2/24 h by continuous infusion for 5 days, D1-D5 and D29-D33) and cisplatinum (70 mg/m2 IV bolus on D2 and D30). Radiation therapy was concomitant in 2 courses delivering 20 grays in 5 days (D1-D5 and D29-D33). On the first day of the treatment, peroral endoscopic dilation or Nd-YAG laser therapy was applied. At the end of treatment all the patients could eat. Histoendoscopic control was performed 8 weeks after the beginning of therapy. Seventeen of the 24 patients had a complete response with negative biopsies. Of the 7 patients with metastatic disease, only 4 were evaluable for response to chemotherapy: one with hepatic metastasis had a complete response for 12 months, 2 had stable disease and one progressive disease.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1986

Appearance of specific antibody-bearing cells in human bronchial mucosa after local immunization with bacterial vaccine.

The immune response to local in vivo inhalation of a lysed bacteria vaccine was assessed in surgical specimens of main-stem bronchi from patients who had undergone pneumectomy for cancer. The patient population included 22 subjects; 11 of these received the aerosol vaccine twice a day for 10 days prior to surgery, while the remaining 11 patients were used as controls and were not immunized. The submucous glands of immunized subjects showed significantly more cells than did those of the controls, i.e., 62 +/- 8 versus 37 +/- 7, respectively (P less than 0.05). The following five antigens were chosen for study by fluorescence assay: Streptococcus pneumoniae types II and III, Haemophilus influenzae, Streptococcus sp. strain D19, and Klebsiella pneumoniae. An immunization-dependent correlation was found between immunoglobulin A, immunoglobulin A-bearing cells, and specific antibody-bearing cells on the one hand and three of the five antigens (S. pneumoniae types II and III and Streptococcus sp. strain D19) on the other hand. This is the first time that a relationship has been established between bacterial immunization of the lower respiratory tract and local immunoglobulin production in humans.

Adolescent↗