Intratracheal aspiration in a patient on ventilation is generally performed using a catheter. Of late, closed suction systems have been used more frequently than open systems. To remove tracheal secretions through the intratracheal tube, catheter suction is used, and the suction catheter may be of the closedor open-type. The catheters are cleaned by flushing with sterile 0.9% saline, resulting in dropping of dew. This phenomenon is caused by some factors: influence of flow, clogging of the suction tube, problem of manipulation of flushing and angle between the intubation tube and the connection port. But this dropping has not yet been investigated. In this study, we focused at this angle and we used the test lung which is simulated machine on behalf of patient. We consider two situations adult and child, also two types of catheters Eco-Cath and Ty-care. In child case we consider elbow-type suction catheters and Y-connector type. The angle was set at 0˚, 20˚, 40˚, 60˚, and 90˚, and we observed the difference between Eco-Cath and Ty-care. In adults difference is significant (p 0.001), In 90˚ between Tracheal intubation and Tracheotomy (p ≈ 0.26). In child difference is significant (p 0.001), In 90˚ between Tracheal intubation and Tracheotomy (p ≈ 0.15). In child case we observed dependency of angle on various conditions too. The relation of the angle and dew was clarified.
Introduction: During the application of non-invasive positive pressure ventilation (NPPV) therapy in home mechanical ventilation (HMV), leaks in the NPPV mask may occur owing to the position of the mask due to conditions such as skin disorders. Methods: To investigate whether such a leak affects FiO 2 supplied to the alveoli, we simulated a patient with chronic obstructive pulmonary disorder during NPPV in HMV. In addition, FiO 2 was measured in the portion assumed to be the mouth and lungs while setting the flow of the oxygen concentrator and leak amount based on a previous study. Results: FiO 2 supplied to the lungs increased statistically significantly upon increasing the amount of leak (P < 0.001). Moreover, values measured for the mouth were similar. However, our results were different from those of a previous study. Conclusions: We observed that FiO 2 supplied to alveoli can be reduced by a leak in the NPPV mask. Because our results differ from those previously reported, we believe that further studies should reassess the selection of respirators and oxygen concentrators.
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