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Now, catheter to detect obstructions in the airways | India News


BENGALURU: In what has the potential to improve the diagnosis of abnormalities such as stenosis, researchers from the Indian Institute of Sciences (IISc) and their collaborators have demonstrated a method to quantify changes in airflow in the airways.
Stenosis is a condition in which the effective (inner) lumen area is reduced in the tracheal and bronchial segments of our respiratory tract or airway due to obstructions and is often associated with morbidity and mortality, as narrowing of the airway increases resistance to airflow.
They pointed out that the diagnosis of this type of anomaly is usually based on clinical suspicion due to the non-specificity of the associated clinical symptoms. And visual evaluation using conventional bronchoscopy or X-ray imaging from a CT scan to precisely locate the site of the obstruction is highly subject to the expertise of the physician.
“Characterizing airflow patterns in stenosed (0 obstructed) airways therefore requires newer diagnostic tools that can effectively quantify changes in airflow due to construction sites,” said the researchers. researchers in the article published in the Journal of Micromechanics and Microengineering.
Alekya B and Hardik J Pandya from IISc’s electronics systems engineering department and colleagues have demonstrated a maneuverable intubation catheter (a thin tube made of medical grade materials that performs a wide range of functions) that can quantitatively measure the velocity of the air in various segments of the airways. .
“Our work presents a steerable intubation catheter that can quantitatively measure air velocity in various segments of the tracheobronchial tree,” the researchers said.
The catheter consists of a flexible, three-layer printed circuit board integrated with thermal flow sensors based on microelectromechanical systems (MEMS), as well as a pair of sub-millimeter helical memory actuators.
“The researchers tested it by measuring the air velocity in the trachea of ​​sheep under normal and stenotic conditions. Even a 10% reduction in lumen area generated unique peaks corresponding to the site of obstruction. Such a catheter can be used to identify stenosis in the preclinical stages, ”said IISc.

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