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Biomedical subjects

S Raoof

Publications and source records attributed to S Raoof.

10 recordsLinked to original sources
PubMed2001

Role of bronchoscopy in modern medical intensive care unit.

This article gives a broad overview of the increasingly important applications of bronchoscopy, flexible (FOB) and rigid (RB), in a modern medical intensive care unit. Special emphasis is made to bronchoscopy use in mechanically ventilated patients. Therapies such as endobronchial stenting and Nd:YAG laser are being used to improve respiratory failure and facilitate weaning from mechanical ventilation. Practical applications of recent advancements in technology (endobronchial stenting, laser therapy, and so forth), the increasing use of rigid bronchoscopy, and the new generation of flexible bronchoscopes like battery bronchoscopes, and ultra-thin bronchoscopes, are also discussed. The risks, potential benefits, complications, and suggested technique of performing bronchoscopy in mechanically ventilated patients are reviewed.

Bronchial Diseases↗
PubMed2001

Therapeutic flexible bronchoscopy.

Since the development of the flexible bronchoscope in late 1960s, its use in the management of various pulmonary disorders, especially lung Ca, has expanded tremendously. It is not only of great diagnostic value, with the recent development of various therapeutic modalities such as Nd:YAG laser, tracheobronchial stents, and cryotherapy, but also its value in management of terminal lung Ca has improved dramatically. Its potential in curing early-stage lung Ca presently is being explored. At present, it is at least partially successful in achieving this goal. More importantly, because of lack of the training in RB and widespread usage of FB, it is more likely that its role in the various interventional procedures, such as Nd:YAG laser therapy, tracheobronchial stent deployment, brachytherapy, and cryotherapy, will grow exponentially. Because of availability of a variety of therapeutic modalities, such as APC, PDT, and balloons, interventional pulmonologists are well equipped to improve the quality of life of terminally ill patients with cancer and maybe to cure early stage lung Ca.

Brachytherapy↗
PubMed1999

Role of bronchoscopy in AIDS.

The differential diagnosis of pulmonary disorders in the HIV-infected individual is broad. Clinical features and chest radiographs may point towards a diagnosis but cannot reliably establish one. It is important to know the conditions in which bronchoscopy, BAL, and TBB are likely to be diagnostic, just as it is to know when other invasive or noninvasive procedures may be more useful. Finally, the incidence of transmission of infections such as tuberculosis during bronchoscopy and cross-contamination of patients with an improperly sterilized bronchoscope, cannot be overemphasized.

Acquired Immunodeficiency Syndrome↗
PubMed1999

Effect of combined kinetic therapy and percussion therapy on the resolution of atelectasis in critically ill patients.

BACKGROUND: Some critically ill patients have difficulty in mobilizing their respiratory secretions. These patients can develop pulmonary atelectasis that may result in hypoxemia. There are some data to show that atelectasis may be prevented by turning a patient from side to side utilizing special beds. STUDY OBJECTIVES: To determine the role of kinetic therapy (KT) combined with mechanical percussion (P) in the resolution of established atelectasis of the lungs and hypoxemia in critically ill, hospitalized patients. (KT was defined as rotation of a patient along the longitudinal axis of > or = 40 degrees to each side continuously.) DESIGN: Prospective and randomized study (2:1 test to control group). PATIENTS: Twenty-four patients with respiratory failure, either mechanically ventilated or spontaneously breathing, who demonstrated segmental, lobar, or unilateral entire lung atelectasis were studied. SETTING: Medical ICU and adult respiratory ward in a county hospital in New York. INTERVENTIONS: Seventeen patients were treated with KT combined with mechanical P using a KT system (Triadyne Kinetic Therapy System; KCI; San Antonio, TX). Seven patients received manual repositioning and manual P every 2 h. Both groups received similar conventional therapy with inhaled bronchodilators and suctioning. RESULTS: Partial or complete resolution of atelectasis was seen in 14 of 17 patients (82.3%) in the test group as compared with 1 of 7 patient (14.3%) in the control group. The median duration to resolution of atelectasis was 4 days in the test group. Bronchoscopy was performed in 3 of 7 patients in the control group, but in none of the patients in the test group. A cost of $720 was incurred per patient for utilizing the specialty beds for a mean duration of 4 days. An improvement in oxygenation index occurred in the test group (change in baseline PaO2/fraction of inspired oxygen from 207.4+/-106.7 mm Hg to 318+/-100.7 mm Hg) at the end of therapy, while the control group showed a reduction over a similar duration of time (181.3+/-96.3 mm Hg to 112+/-21.2 mm Hg). CONCLUSIONS: KT and mechanical P therapy resulted in significantly greater partial or complete resolution of atelectasis as compared with conventional therapy. There was a generalized trend toward statistical significance in the improvement of oxygenation and a reduced need for bronchoscopy in the group receiving KT and P therapy.

Aged↗
PubMed1995

Cytokines affect pseudomonas binding to tracheal cells via a neutrophil-mediated process.

Critical illness is often associated with gram-negative bacterial colonization of the airways, increasing the risk of nosocomial pneumonia. Cytokines, released in response to endotoxin, might contribute to this phenomenon by causing changes in epithelial cell binding of bacteria. To investigate this possibility, human monocytes and hamster pulmonary macrophages were cultured without or with Escherichia coli endotoxin (10 micrograms/ml) for 4 and 24 h. Hamster and human tracheal epithelial cells were treated with supernates from monocyte cultures for 24 h, and subsequent binding of 14C-labeled Pseudomonas aeruginosa to the epithelial cells was measured (percent adherence). In separate experiments, recombinant human (rh) tumor necrosis factor-alpha (TNF-alpha) (25 to 100 ng/ml) and interleukin-1 beta (IL-1 beta) (2,000 to 8,000 pg/ml) were added to hamster monolayers. Neither monocyte supernates nor purified cytokines were toxic to the epithelial cells for up to 48 h. There was no significant change in P. aeruginosa adherence to either hamster or human tracheal epithelial cells after 24 h of exposure to culture supernates from either endotoxin-stimulated human monocytes or hamster macrophages. Similarly, purified rhTNF and rhIL-1 exposure did not increase bacterial adherence. However, when polymorphonuclear leukocytes were coincubated with the monocyte supernates and epithelial cells, P. aeruginosa adherence was significantly increased. Moreover, this effect was enhanced by an epithelial cell-derived substance. Thus, while inflammatory cytokines may participate in enhancing bacterial colonization of the lung in vivo, they do not do so by a direct action on tracheal epithelial cells but can act via a neutrophil-dependent mechanism.

Animals↗
PubMed1987

Controlled, comparative study of ciprofloxacin versus ampicillin in treatment of bacterial respiratory tract infections.

The efficacy and safety of ciprofloxacin in bacterial bronchitis were compared with those of ampicillin in a double-blind, prospective clinical trial. Eighty-seven patients received either oral ciprofloxacin (750 mg twice daily) or oral ampicillin (500 mg four times daily). Ciprofloxacin was as effective as ampicillin and produced a 98 percent clinical cure rate. Significantly more pretreatment bacterial isolates were susceptible to ciprofloxacin (p less than 0.05), and ciprofloxacin had a significantly higher rate of sputum sterilization than did ampicillin (p less than 0.05). Ciprofloxacin showed broad in vitro antibacterial activity with particularly low minimal inhibitory concentrations for gram-negative organisms. Ciprofloxacin was well tolerated; there were few adverse effects, and patients had a significantly lower incidence of diarrhea with ciprofloxacin than with ampicillin (p less than 0.05). Ciprofloxacin was an effective and well-tolerated treatment for bacterial bronchitis that had the advantages of broad in vitro antibacterial activity and twice-daily dosing.

Adult↗
PubMed1987

Ciprofloxacin increases serum levels of theophylline.

During a clinical trial of orally administered ciprofloxacin in respiratory tract infections, changes in serum theophylline levels were evaluated in 33 hospitalized patients who also required theophylline therapy. Patients received intravenous theophylline in standard titrated doses and 750 mg of oral ciprofloxacin twice daily. Serum theophylline levels in all patients were measured before and during ciprofloxacin therapy. The mean serum pretreatment theophylline level was 7.8 +/- 4.6 micrograms/ml; during ciprofloxacin therapy, the level increased to 14.6 +/- 7.4 micrograms/ml. Twenty of the 33 (61 percent) patients evaluated had increases in serum theophylline levels by a mean value of 10.5 micrograms/ml. In 30 percent of patients who experienced increases, theophylline concentrations were in the toxic range. This occurred more frequently in elderly patients with chronic obstructive pulmonary disease. In light of the frequency and potential severity of this interaction, careful monitoring of serum theophylline levels in patients receiving theophylline and ciprofloxacin is recommended.

Administration, Oral↗
PubMed1986

Treatment of respiratory tract infections with ciprofloxacin.

The efficacy and safety of ciprofloxacin in an oral dose of 750 mg twice daily, in the treatment of respiratory infections was studied in 129 patients. Ciprofloxacin showed broad in-vitro antibacterial activity and was highly effective in both Gram-negative and Gram-positive infections with a clinical cure rate of 96%. The major side effect was an interaction with theophylline particularly in the elderly patients.

Adult↗