A visual dilatation sheath for percutaneous nephrolithotomy

Abstract

The present invention provides a visual dilatation sheath for percutaneous nephrolithotomy, wherein the dilatation tube is cylindrical, the front end is a cone, the top of the cone is a circular plane, an optical fiber channel and a guide wire channel are arranged in the dilatation tube, the optical fiber channel passes through the circular plane at the top of the cone, and the guide wire channel passes through the outer surface of the cone. During operation, the guide wire extends out of the top of the guide wire channel, and the optical fiber is flush with the top of the optical fiber channel, so that the operator can directly observe the travel position of the guide wire and the dilatation tube through the optical fiber.

Description

Technical Field

[0001] The invention relates to a medical device, in particular to a percutaneous nephroscope. Background Art

[0002] Surgical treatments for kidney stones include: open lithotripsy, extracorporeal lithotripsy, and percutaneous nephrolithotomy. The traditional method of "open surgery to remove stones" requires a large incision of about 20 cm in the waist, cutting the waist muscles, separating the kidneys, and making a small incision in the renal pelvis or renal parenchyma to remove the stones. This method causes great damage, more bleeding, severe pain, and slow recovery. Usually, hospitalization is required for about 7 days after surgery. Because the surgical incision is large, not only is the skin unsightly, but the patient's physical strength is also greatly affected after the operation. Compared with open surgery, percutaneous nephrolithotomy has the advantages of less damage, less pain, thorough stone removal, and faster recovery. The incision on the waist is usually less than 1 cm. Because the muscles are not cut, it not only does not affect the appearance, but also has almost no effect on labor after the operation. Patients can usually be discharged from the hospital 2 to 3 days after the operation. Compared with laparoscopic stone removal, percutaneous nephrolithotomy has little effect on the kidneys and surrounding structures, and does not affect various subsequent kidney surgeries. Compared with extracorporeal lithotripsy, it has a short treatment cycle, immediate effect, and less impact on renal function.

[0003] However, the traditional percutaneous nephroscope still has defects. For example, when dilation is performed after puncture, the traditional dilation sheath cannot observe the position of the dilation sheath, which can easily cause medical accidents such as excessive puncture and renal bleeding. Summary of the invention

[0004] The present invention is to solve the above-mentioned problem and overcome the problems existing in the prior art of percutaneous nephroscopic puncture and dilation. The present invention provides a percutaneous nephroscopic visual dilation sheath to meet the needs.

[0005] In order to achieve the above object, the technical solution of the present invention is as follows:

[0006] A percutaneous nephroscopic visual dilatation sheath comprises a tear sheath and a dilatation tube arranged in the tear sheath, characterized in that the dilatation tube is cylindrical, the front end is a cone, the top of the cone is a circular plane, an optical fiber channel and a guide wire channel are arranged in the dilatation tube, the optical fiber channel and the guide wire channel are arranged parallel to the dilatation tube, and the optical fiber channel passes through the circular plane, the guide wire channel passes through the outer surface of the cone, and the optical fiber channel is concentric with the circular plane.

[0007] The above-mentioned percutaneous nephroscopic visual dilatation sheath is characterized in that the cross-sectional shape of the optical fiber channel is circular; the cross-sectional shape of the guide wire channel is circular.

[0008] The above-mentioned percutaneous nephroscopic visual dilatation sheath is characterized in that it also includes a tear sheath joint and an expansion tube joint, the tear sheath joint is connected to the tear sheath, and the tear sheath joint and the tear sheath are arranged on the outer wall of the expansion tube; the expansion tube joint is connected to the expansion tube, and the expansion tube joint is connected to the tear sheath joint.

[0009] The above-mentioned percutaneous nephroscopic visual dilatation sheath is characterized in that the dilatation tube joint includes three lumens, namely a guide wire lumen, an optical fiber lumen and an injection lumen, the optical fiber lumen and the injection lumen are connected to the optical fiber channel, and the guide wire lumen is connected to the guide wire channel.

[0010] The above-mentioned percutaneous nephroscopic visual dilatation sheath is characterized in that it also includes a connector for connecting the dilatation tube joint and the tear sheath joint, and the two ends of the connector are detachably connected to the dilatation tube joint and the tear sheath joint respectively.

[0011] The above-mentioned percutaneous nephroscopic visual dilatation sheath is characterized in that a suction channel is provided on the tear sheath connector.

[0012] The above-mentioned percutaneous nephroscopic visual dilatation sheath is characterized in that two suction channels are arranged on the tear sheath joint, one of which is a through hole and the other is a blind channel, and the two suction channels are symmetrically arranged.

[0013] The above-mentioned percutaneous nephroscopic visual dilatation sheath is characterized in that the inner walls of the guide wire lumen and the optical fiber lumen are provided with steps, and the outer walls are provided with external threads. It also includes a locking joint and a locking plug. The locking plug is arranged at the step, and the inner wall of the locking joint is provided with internal threads corresponding to the external threads on the outer walls of the guide wire lumen and the optical fiber lumen. In addition, a circle of extrusion ring is also provided on the inner side of the inner wall of the locking joint, and the top of the extrusion ring is in contact with the locking plug.

[0014] The beneficial effect of the present invention is that when the visual dilatation sheath is used for dilatation puncture, the visual imaging system can be used to effectively locate the puncture dilatation, thereby preventing medical accidents such as renal hemorrhage caused by excessively deep puncture in conventional surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional schematic diagram of the present invention;

[0016] Figure 2 is a side view schematic diagram of the expansion tube;

[0017] Figure 3 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0018] Figure 4 for Figure 1 A magnified schematic diagram of point B in the middle. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below with reference to specific diagrams.

[0020] See also Figure 1-Figure 3 A percutaneous nephroscopic visual dilatation sheath comprises a tear sheath 100 and a dilatation tube 200 disposed in the tear sheath 100, wherein the dilatation tube 200 is cylindrical, and the front end is a cone, and the top of the cone is a circular plane 230, and an optical fiber channel 210 and a guide wire channel 220 are disposed in the dilatation tube 200. The optical fiber channel 210 can pass through an optical fiber and water injection, and the guide wire channel 220 can pass through a guide wire. The optical fiber channel 210 and the guide wire channel 220 are arranged parallel to the dilatation tube 200, and the optical fiber channel 210 passes through the circular plane 230, and the guide wire channel 220 passes through the outer surface of the cone, and the optical fiber channel 210 is concentric with the circular plane 230. In the present invention, the cross-sectional shape of the optical fiber channel 210 and the guide wire channel 220 is circular; and the cross-sectional shape of the guide wire channel 220 is circular.

[0021] Due to the diameter limitation of the expansion tube 200, if the optical fiber channel 210 and the guide wire channel 220 are both placed on the circular plane 230, the diameter of the optical fiber channel 210 will become smaller, resulting in the optical fiber only being able to pass through in the form of a bare optical fiber, which causes great damage to the optical fiber. However, through the design of the present invention, the entire circular plane 230 has only one optical fiber channel 210 with a diameter close to the diameter of the circular plane 230, so that a fiber protective sheath can be installed on the optical fiber outer shell and then pass through the optical fiber channel 210.

[0022] It also includes a tear sheath joint 300 and an expansion tube joint 400. The tear sheath joint 300 is connected to the tear sheath 100. The tear sheath joint 300 and the tear sheath 100 are connected by a hot melt or glue bonding process, and the tear sheath joint 300 and the tear sheath 100 are sleeved on the outer wall of the expansion tube 200; the expansion tube joint 400 is connected to the expansion tube 200, and the expansion tube joint 400 is connected to the tear sheath joint 300. It also includes a connector 500 for connecting the expansion tube joint 400 and the tear sheath joint 300. The two ends of the connector 500 are detachably connected to the expansion tube joint 400 and the tear sheath joint 300, respectively, and the connection method can be a buckle method or an interference fit method.

[0023] The expansion tube joint 400 includes three cavities, namely a guidewire cavity 410 , an optical fiber cavity 420 and an injection cavity 430 . The optical fiber cavity 420 and the injection cavity 430 are connected to the optical fiber channel 210 , and the guidewire cavity 410 is connected to the guidewire channel 220 .

[0024] The tear sheath connector 300 is provided with a suction channel 310. The tear sheath connector 300 is provided with two suction channels 310, one of which is a through hole, and the other is a blind channel, and the two suction channels 310 are symmetrically arranged.

[0025] See also Figure 4 , the guide wire channel 410 and the optical fiber channel 420 are both provided with steps 610 on their inner walls, and external threads 620 on their outer walls, and also include a locking joint 630 and a locking plug 640, wherein the locking plug 640 is arranged at the step 610, and an internal thread 650 corresponding to the external thread 620 on the outer walls of the guide wire channel 410 and the optical fiber channel 420 is arranged on the inner wall of the locking joint 630, and a circle of extrusion ring 660 is also provided on the inner side of the inner wall of the locking joint 630, and the top of the extrusion ring 660 contacts the locking plug 640, by installing the locking joint 630 to the guide wire channel 410 and the optical fiber channel 420, twisting the thread so that the extrusion ring 660 squeezes the locking plug 640, causing the locking plug 640 to deform, thereby locking the guide wire and optical fiber passing through the locking plug 640.

[0026] During operation, the optical fiber and the guide wire are respectively passed through the optical fiber cavity 420 and the guide wire cavity 410 into the optical fiber channel 210 and the guide wire channel 220, and finally the guide wire extends out of the top of the guide wire channel 220, and the optical fiber is flush with the top of the optical fiber channel 210. Then the expansion tube 200 expands the puncture hole. Due to the presence of the optical fiber, the operator can clearly see the travel position of the expansion tube 200. If it is found that the front end of the optical fiber is not clearly visible, water can be injected through the injection cavity 430. When the expansion tube 200 reaches the renal pelvis, it stops moving forward, so that it will not cause excessive puncture or puncture of the kidney. Then leave the tear sheath in the puncture hole, remove the expansion tube joint 400 from the tear sheath joint 300, and then pull out the expansion tube 200. After that, connect the subsequent surgical instruments to the tear sheath 300.

[0027] The beneficial effect of the present invention is that when the visual dilatation sheath is used for dilatation puncture, the visual imaging system can be used to effectively locate the puncture dilatation, thereby preventing medical accidents such as renal hemorrhage caused by excessively deep puncture in conventional surgery.

[0028] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A dilation tube, which is used for dilation sheath of percutaneous nephrolithotomy, characterized in that: The expansion tube is cylindrical, with a front end that is a cone, and the top of the cone that is a circular plane. An optical fiber channel and a guide wire channel are provided in the expansion tube, and the optical fiber channel and the guide wire channel are both arranged parallel to the expansion tube, wherein the optical fiber channel passes through the circular plane at the top of the cone, and the guide wire channel passes through the outer surface of the cone, wherein the optical fiber channel is concentric with the circular plane, and the diameter of the optical fiber channel is close to the diameter of the circular plane. During operation, the guide wire extends out of the top of the guide wire channel, and the optical fiber is flush with the top of the optical fiber channel, so that the operator can directly observe the travel position of the guide wire and the expansion tube through the optical fiber, and clean the front end of the optical fiber by injecting water through the optical fiber channel to keep the field of vision clear.

2. The expansion tube according to claim 1, wherein the cross-sectional shape of the optical fiber channel is circular.

3. The dilation tube according to claim 1, wherein the cross-sectional shape of the guidewire channel is circular.

4. The expansion tube according to any one of claims 1-2, wherein the optical fiber outer shell is provided with a protective sleeve.

5. A percutaneous nephroscopic visual dilatation sheath, characterized in that: The invention comprises a tear sheath and an expansion tube arranged in the tear sheath, wherein the expansion tube is cylindrical, and the front end is a cone, and the top end of the cone is a circular plane. An optical fiber channel and a guide wire channel are arranged in the expansion tube, and the optical fiber channel and the guide wire channel are both arranged parallel to the expansion tube, wherein the optical fiber channel passes through the circular plane at the top end of the cone, and the guide wire channel passes through the outer surface of the cone, wherein the optical fiber channel is concentric with the circular plane, and the diameter of the optical fiber channel is close to the diameter of the circular plane. During operation, the guide wire extends out of the top end of the guide wire channel, and the optical fiber is flush with the top end of the optical fiber channel, so that the operator can directly observe the travel position of the guide wire and the expansion tube through the optical fiber, and clean the front end of the optical fiber by injecting water into the optical fiber channel to keep the field of vision clear.

6. A percutaneous nephroscopic visual dilatation sheath according to claim 5, wherein the cross-sectional shape of the optical fiber channel is circular.

7. A percutaneous nephroscopic visual dilatation sheath according to claim 5, wherein the cross-sectional shape of the guidewire channel is circular.

8. A percutaneous nephroscopic visual dilatation sheath according to claim 5, wherein the optical fiber outer shell is provided with a protective sheath.

9. A percutaneous nephroscopic visual dilatation sheath according to any one of claims 5 to 8, which also includes a tear sheath connector and an expansion tube connector, wherein the tear sheath connector is connected to the tear sheath, and the tear sheath connector and the tear sheath are sleeved on the outer wall of the expansion tube; the expansion tube connector is connected to the expansion tube, and the expansion tube connector is connected to the tear sheath connector.

10. A percutaneous nephroscopic visual dilatation sheath according to claim 9, wherein the dilatation tube joint comprises three lumens, namely a guidewire lumen, an optical fiber lumen and an injection lumen, the optical fiber lumen and the injection lumen are connected to the optical fiber channel, and the guidewire lumen is connected to the guidewire channel.

11. A percutaneous nephroscopic visual dilatation sheath according to claim 9, further comprising a connector for connecting the dilatation tube joint and the tear sheath joint, wherein both ends of the connector are detachably connected to the dilatation tube joint and the tear sheath joint, respectively.

12. A percutaneous nephroscopic visual dilatation sheath according to claim 9, wherein a suction channel is provided on the tear sheath connector.

13. A percutaneous nephroscopic visual dilatation sheath according to claim 9, wherein the tear sheath connector is provided with two suction channels, one of which is a through hole, and the other is a blind channel, and the two suction channels are symmetrically arranged.

14. A percutaneous nephroscopic visual dilatation sheath according to claim 10, wherein the inner walls of the guide wire lumen and the optical fiber lumen are provided with steps, and the outer walls are provided with external threads, and further comprising a locking joint and a locking plug, wherein the locking plug is provided at the step, and the inner wall of the locking joint is provided with internal threads corresponding to the external threads on the outer walls of the guide wire lumen and the optical fiber lumen, and an extrusion ring is also provided on the inner side of the inner wall of the locking joint, and the top of the extrusion ring is in contact with the locking plug.

Images