Biomedical subjects

Nasser Behbehani

Publications and source records attributed to Nasser Behbehani.

3 recordsLinked to original sources

PubMed2004

Asthma and sensitization in a community with low indoor allergen levels and low pet-keeping frequency.

BACKGROUND: Little is known about causes of asthma and sensitization in desert countries. OBJECTIVE: To investigate risk factors associated with asthma and sensitization in Kuwait. METHODS: One hundred sixty children (9-16 years) with physician-diagnosed asthma were recruited and matched (age, sex) with 303 healthy controls. Risk factors were assessed by questionnaires, determination of sensitization status (skin tests and IgE), and home allergen exposure (mite, cat, dog, cockroach; ELISA). RESULTS: Home allergen levels and frequency of pet ownership were very low (cat, 4.1%; dog, 1.5%). The risk of cat sensitization increased significantly among cat owners (odds ratio [OR], 3.53; 95% CI, 1.33-9.41; P = .01), and in children with reported contact with cats during the first year of life (OR, 2.60; 95% CI, 1.17-5.80; P = .019). In the multivariate analysis, maternal atopy (OR, 1.77; 95% CI, 1.13-2.75; P = .01) and cat ownership (OR, 3.32; 95% CI, 1.19-9.25; P = .02) remained significant associates of cat sensitization. Current dog ownership significantly increased the risk of sensitization to dog (OR, 6.05; 95% CI, 1.33-27.54; P = .02). In the multivariate analysis, dog ownership remained the only significant associate of dog sensitization (OR, 6.02; 95% CI, 1.30-27.96; P = .02). Sensitization to Alternaria was the strongest independent associate of the asthma group. Family history of asthma, history of whooping cough, current cat ownership, and breast-feeding <2 months were other significant and independent risk factors for asthma. CONCLUSIONS: Pet ownership markedly increased the risk of sensitization to pets. Despite low allergen exposure, the pattern of childhood asthma in Kuwait follows that described in Western communities (strong association with sensitization).

Adolescent↗

PubMed2004

Percutaneous multiple-site parietal pleural biopsy: description and evaluation of a new and safe technique.

STUDY OBJECTIVES: (1) To describe a new percutaneous pleural biopsy technique to obtain multiple-site parietal pleural biopsy specimens in patients with pleural effusion (PE), and (2) to evaluate its effectiveness and safety compared to current techniques. DESIGN: Prospective interventional study. SETTING: University teaching hospital. PATIENTS: Consecutively referred for evaluation of exudative PE. INTERVENTION: With the patient in a semirecumbent position, a 9F sheath was inserted by the Seldinger technique into the pleural cavity on the midaxillary line under local anesthesia and fluoroscopic guidance. An 8F bioptome was introduced through it, and biopsy specimens were taken from several sites on the costal and diaphragmatic pleura. After biopsy, PE was completely evacuated, and the sheath was removed. RESULTS: During the 2-year pilot study, we procured, on average, 14 adequate pleural specimens from each of the 28 patients (age range, 15 to 81 years) on the first attempt. Histopathologic examination revealed tuberculous pleuritis (18 patients), metastatic adenocarcinoma (1 patient), and nonspecific pleuritis (9 patients). Postprocedure, 25 patients had rapid symptomatic improvement without recurrence of PE. No major complications occurred during or after the procedure (mean follow-up period, 2 years). CONCLUSIONS: Our new biopsy procedure can be performed easily, safely, and with increased diagnostic sensitivity and patient comfort. Unlike other biopsy techniques, it provides adequate multiple-site pleural biopsy specimens, in all cases, on the first attempt without any morbidity and mortality. It has a therapeutic potential to provide rapid symptomatic relief and treatment by pleurodesis. We recommend this procedure for patients whose conditions remain undiagnosed after undergoing needle biopsy or for those who cannot tolerate it, before considering more aggressive diagnostic interventions. This is the best alternative when thoracoscopy or thoracotomy are not available or when patients are at high risk for complications from them.

Adolescent↗

PubMed2004

Flexible fiberoptic bronchoscopy. Diagnostic yield.

OBJECTIVE: Fiberoptic bronchoscopy is a minimally invasive procedure with a high diagnostic yield. The aim of this study was to document the usefulness of the procedure in the diagnosis of various respiratory disorders in a Middle East country. METHODS: Data on all bronchoscopies carried out in Chest Diseases Hospital, Kuwait from January 1996 to December 1998 were retrospectively collected. RESULTS: Out of 968 cases, only 620 (64%) patients had a full follow up. Suspected pulmonary tuberculosis (TB) (51.6%), unresolving pneumonia (16.1%), hemoptysis with a normal chest radiograph (8.4%), lung mass (7.7%) and hilar lymphadenopathy (3.2%) were the most common indications. Eleven percent of patients who underwent bronchoscopy had a normal chest radiograph, the reason being hemoptysis in 75.4%, inhalation injury in 21.8% and suspected upper airway obstruction in 2.9%. In smear negative suspected TB cases, 22.5% proved to have active disease. Acid fast bacillus was identified in bronchoalveolar lavage, either by smear or culture, in 44 (73.3%) patients with suspected pulmonary TB and in 6 (54.5%) patients with miliary shadows. An underlying cause was identified in 28 (28%) patients with unresolving pneumonia. Ninety-four percent of cases with clinical impression of bronchogenic carcinoma could be diagnosed. Transbronchial biopsy was diagnostic in 79% patients with diffuse parenchymal lung disease. No complications other than transient hypoxemia and controllable bleeding were noticed. CONCLUSION: Generally, the indications for flexible fiberoptic bronchoscopy remained similar to elsewhere. Unlike western series, the majority of the cases were for the diagnosis of pulmonary infections especially TB.

Adult↗