| 摘要 |
FIELD: medicine.SUBSTANCE: medical devices and methods, more specifically to devices, systems and methods of treating sinusitis. A guide catheter for the directional insertion of one or more flexible devices into a patient's sinus and the aspiration by means of the guide catheter. According to the first version, the guide catheter comprises an elongated shaft of the catheter designed for insertion into a patient's nostril, and an assembled bushing connected to a proximal portion of the shaft. The shaft comprises a proximal portion, a curved distal portion more flexible as compared to the proximal portion, and a lumen extending longitudinally through the proximal and distal portions. The assembled bushing comprises an inner chamber fluid-connected to the lumen of the shaft, a backpressure valve integrated into the inner chamber, as aspiration port for connecting the aspiration mechanism to the bushing, and a vent hole. The valve has a hole used to form a hermetic sealing surround the device advanced through the valve. The lumen comprises a first inner diameter in the proximal portion of the shaft. The first inner diameter has a size sufficient to enable a proximal aspiration procedure through the shaft while the balloon catheter is found in the lumen of the proximal portion. According to the second version of the guide catheter, the lumen of the proximal portion of the shaft comprises the backpressure valve. An aspiration port extends along the proximal portion of the shaft in order to connect the aspiration mechanism to the guide catheter. The vent hole is formed along the proximal portion of the shaft. A sinus or sinus cavity surgical system comprises the above guide catheter according to the first version and the flexible device designed for insertion through the guide catheter into the sinus cavity to perform a sinus or sinus cavity surgery.EFFECT: invention is simple and least injuring.26 cl, 27 dwg |
