| 摘要 |
A medical device 10 particularly adapted for debriding an abscess, phlegmon, or hematoma in a human or veterinary patient, for removing debrided and other materials from the abscess and for draining the abscess first includes a flexible catheter 12 having a longitudinally extending flow lumen 14, a rounded distal tip 16, a side portion 18 extending proximally from the distal tip 16 and an oval or other lateral opening 20, 44 or 46 extending through the side portion 18. The device also includes a cutting cannula 22 positionable in and longitudinally slidable in the flow lumen 14 in the catheter 12. The cannula 22 has an open distal end 24 and a sharp, beveled circumferential cutting edge 26 formed on the open distal end 24, the circumferential cutting edge 26 being disposed perpendicularly to the flow lumen 14 of the catheter 12. Upon movement of the cannula 22 in the flow lumen 14, the cutting edge 26 moves across the lateral opening 20 and cuts any material extending through the lateral opening 20 of the catheter 12. The cannula 22 further has a proximal end 30 opposite the open distal end 24 adapted for the application of suction thereto. The catheter 12 is capable of draining the abscess even when the cutting cannula 22 is not positioned in the flow lumen 14. The device 10 can also include a side arm 40 connected to the proximal end 36 of the catheter 12 in fluid communication with the flow lumen 14 of the catheter 12, and a fitting 42 connecting the side arm 40 to the proximal end 36 of the catheter 12. The fitting 42 can contain a seal element 38 through which the cannula 22 can be passed. |
