a 56 year old man was admitted to our center for further evaluation of typical chest pain of ten months' duration. selective coronary angiography was done and showed a sewing needle-like foreign body which was lying in very close proximity to the anatomic location of the right coronary artery. at operation two pieces of sewing needles were removed, one from the coronary sinus and the other...

A variety of asynchronies between the patient’s respiratory efforts and programed ventilatory settings have been categorized. Reverse trigger is described as an inspiratory effort occurring after a ventilator-initiated breath may represent form entrainment. In other words, ventilator triggers muscular efforts. It often appears in repetitive, stereotyped pattern. occurs mechanically ventilated p...

Background: Patients who undergo major orthopedic surgery are at risk of acute kidney injury (AKI) due to blood loss, electrolyte disorders, infection, and the presence of other co-morbidities. In this study, the frequency and risk factors of AKI were investigated. Objective & Methods: This study is a cross-sectional-analytical study with a sample size of 180 people. The studied population wer...

Medically refractory heart failure may be present in children with cardiomyopathy (CMP) or complex congenital heart disease (CHD). In adults, the surgical management of this condition is either heart transplantation or the Batista operation. From March 1995 to January 2000, a total of 6 children, aged from 1 to 16 years, with medically refractory heart failure associated with CMP or complex CHD...

Paired sera, taken before operation and 10-14 days after operation from 64 patients having open heart surgery and 10 having closed heart surgery, were examined for agglutinins to seven common serotypes of Escherichia coli. The results showed that, while 20% of both groups of patients had detectable agglutinins before operation, new antibodies appeared after operation in 69% of patients having o...

BACKGROUND Mechanical ventilator circuits are commonly changed at 48-h intervals. This frequency may be unnecessary because ventilator-associated pneumonia often results from aspiration of pharyngeal secretions and not from the ventilator circuit. We compared the ventilator-associated pneumonia rates and costs associated with 48-h and 7-day circuit changes. METHODS Ventilator circuits were ch...

Cooking is a major contributor to indoor particulate matter (PM) concentrations. Studies suggest that cooking-generated PM rapidly disperses even when range hood in operation, suggesting hoods fail perform sufficiently used isolation. However, the performance of can be improved by supply make-up air equivalent airflow rate hood. This study evaluates prevention dispersion and discharge ventilati...

Rigorous development processes aim to be effective in developing critical systems, especially if failures can have catastrophic consequences for humans and the environment. Such generally rely on formal methods, which guarantee, thanks their mathematical foundation, model preciseness, properties assurance. However, they are rarely adopted practice. In this paper, we report our experience using ...