CN107898486A - Ureter sheath and its head end cap - Google Patents

Abstract

The invention discloses a kind of head end cap, including head end cap body, vacuum suction passage is equipped with the head end cap body, the entrance side of the vacuum suction passage is equipped with the baffle structure for being used for preventing that large-sized calculus rubble from entering in the vacuum suction passage.The invention also discloses a kind of ureter sheath, including work department and operation portion, the work department includes multi-lumen tube, one end of the multi-lumen tube is connected with the operation portion, other end installation is equipped with head end cap as described above, the vacuum suction path being connected with the vacuum suction passage is equipped with the multi-lumen tube, the vacuum suction interface being connected with the vacuum suction path is equipped with the operation portion.The ureter sheath and its head end cap of the present invention, can effectively prevent calculus rubble from blocking pipeline, can effectively improve reliability.

Description

Ureteral sheath and its tip cap

technical field

The invention belongs to the technical field of medical devices, and in particular relates to a ureter sheath and a head end cap thereof.

Background technique

The ureters are connected to the renal pelvis on the upper side and the bladder on the lower side. They are a pair of slender tubes in the shape of a flat cylinder with an average diameter of 0.5-0.7 cm. The adult ureter has a total length of 25-35 cm, located in the retroperitoneum, and descends vertically along the front of the medial side of the psoas major muscle into the pelvis. The ureter has three strictures: one at the transition between the renal pelvis and the ureter (where the ureter begins), one across the entrance to the pelvic pelvis, and a final one inside into the bladder wall. These narrowings are places where stones, blood clots and necrotic tissue tend to stay. The flexible ureteroscope guide sheath is mainly used clinically for ureteral stenosis, adhesion, obstruction, obstruction, and calculus, and relevant operations are required for treatment to establish a surgical channel, through which the endoscope, laser fiber, stone removal device or operating cable are introduced. Wait.

The Chinese patent with the publication number CN206403732U discloses a medical endoscope suction sheath, including a medical endoscope and a suction sheath, the suction sheath includes a negative pressure connector and a sheath connected to the negative pressure connector, the sheath includes a long Arm tube and short arm tube, the long arm tube and the short arm tube are connected by welding; the medical endoscope is connected with the suction sheath through a slender elastic device; the length difference between the long arm tube and the short arm tube is 5- 30mm, and the long arm tube has a bendable head end. Although the medical endoscope suction sheath has the technical effect of attracting blood, liquid and diseased tissue in the surgical field of view, when it encounters calculi and stones, it is easy to inhale larger stones and stones under the action of negative pressure, resulting in The pipe is blocked, which leads to the failure of negative pressure suction.

The Chinese patent with the publication number CN205073357U discloses a negative pressure suction sheath system, which includes a negative pressure suction sheath and a negative pressure suction machine connected with the negative pressure suction sheath. The suction sheath includes a sheath end, an endoscope input end matched with the endoscope, and a negative pressure connection end connected with a negative pressure suction machine. Similarly, when the negative pressure suction sheath system is used to clean up calculus and debris in the body, larger stone debris will easily block the negative pressure suction sheath, resulting in failure of the negative pressure suction effect.

The Chinese patent with the publication number CN 201782744U discloses a flexible and rigid combined flexible steering endoscope. Outside the hose, the steering handle controls the hose bends. In clinical use, the catheter part enters the urinary tract of the human body, and then the flexible tube is bent by the handle to complete the inspection or treatment. Although the flexible and hard combined flexible steering endoscope of this utility model is simple to operate, easy to use, and can achieve better results in use, it still has the following deficiencies:

The hard tube of the catheter part is usually made of stainless steel. When entering the human body, the metal hard tube will increase the discomfort of the patient, and even cause the patient's muscle spasm, thereby clinging to the catheter so that it cannot enter the urinary catheter smoothly. At the same time, the hard tube is used to cover the outside of the flexible tube, which increases the overall diameter of the catheter, so that when the catheter is inserted into the urethra of children or patients with ureteral stenosis, the resistance it receives is large, which is more likely to cause muscle spasm of the patient, or to the patient. Some damage to the urethra.

When in use, the part of the hose protruding from the hard tube is bent under the operation of the handle. Since the operator cannot see the inside of the catheter when the catheter is inserted into the catheter, if the hose protrudes out of the hard tube due to improper operation When the length of the tube is short and it is forced to bend under the control of the handle, it is easy to break the optical fiber in the hose due to the small bending radius, causing damage to the endoscope.

At the same time, there are usually three internal working channels of the existing hose, which are the instrument channel, the steel wire channel and the image channel. The image channel is also equipped with an illumination fiber, which is easy to damage the image fiber during long-term use, reducing the damage of the image fiber. life. In addition, when the hose is bent, there is a certain angle between the plane where the axis line of the steel wire channel is located and the plane where the hose is located, so that the bending operation of the hose is inflexible and precise.

Similarly, the Chinese patent with the publication number CN 203408026 U discloses a flexible end ureteroscope with a retractable outer sheath. The combination of soft and hard sheaths is adopted, so the above-mentioned deficiencies inevitably also exist.

Contents of the invention

In view of this, the purpose of the present invention is to provide a ureteral sheath and its head end cap, which can effectively prevent calculi and broken stones from blocking the pipeline, and can effectively improve reliability.

To achieve the above object, the present invention provides the following technical solutions:

The present invention firstly proposes a head end cap, including a head end cap body, a negative pressure suction channel is provided in the head end cap body, and a suction channel is provided on the inlet side of the negative pressure suction channel to prevent large-sized stones from being broken. The stone enters the barrier structure in the negative pressure suction channel.

Further, the center of the negative pressure suction channel is provided with a coaxial holmium laser channel.

Further, the barrier structure is a barrier strip I arranged between the inner wall of the negative pressure suction channel and the outer wall of the holmium laser channel.

Further, the barrier strips I are located in the radial direction of the negative pressure suction channel, and the barrier strips I are uniformly arranged in at least two rings.

Further, the barrier structure is a barrier bar II arranged in the negative pressure suction channel.

Further, the baffle strip II is located in the radial direction of the negative pressure suction channel, and the baffle strip II is uniformly arranged in at least two rings.

Further, the head end cap body is made of SUS304 material.

Furthermore, an image channel, a steel wire channel and a water injection channel are also arranged in the head-end cap body.

The present invention also proposes a ureteral sheath, including a working part and an operating part, the working part includes a multi-lumen tube, one end of the multi-lumen tube is connected to the operating part, and the other end is installed with the above-mentioned head The end cap, the multi-lumen tube is provided with a negative pressure suction passage in communication with the negative pressure suction channel, and the operation part is provided with a negative pressure suction interface in communication with the negative pressure suction passage.

Further, the center of the negative pressure suction channel is provided with a coaxial holmium laser channel, the center of the negative pressure suction channel is provided with a holmium laser channel connected to the holmium laser channel, and the operating part is provided with A holmium laser interface connected to the holmium laser path.

Further, an image channel is also provided in the head-end cap body, an image channel communicating with the image channel is provided in the multi-lumen tube, and an image interface communicating with the image channel is provided in the operating part .

Further, the head end cap body is also provided with a water injection channel, the multi-cavity tube is provided with a water injection channel connected with the water injection channel, and the operation part is provided with a water injection interface connected with the water injection channel .

Further, the outer diameter of the multi-lumen tube is 13F, and the maximum outer diameter of the head-end cap is less than or equal to 14F.

Further, a steel wire channel is also provided in the head-end cap body, a steel wire channel communicating with the steel wire channel is provided in the multi-lumen tube, and a steel wire channel for driving a steel wire located in the steel wire channel is provided in the operating part. Telescoping and then driving the bending push rod of the multi-lumen tube.

Further, on the radial section of the multi-lumen tube, the center of the steel wire passage and the negative pressure suction channel are located on the same diameter in the radial section of the multi-lumen tube; and in the multi-lumen tube When the tube is bent, the axis of the steel wire passage and the negative pressure suction passage always lie on the same plane.

Further, the multi-lumen tube includes an entry side section, a curved section that is bent and deformed under the stretching of the steel wire rope, and a working rear section connected to the operating part, and the head end cap is installed on the entry side section .

Further, the length of the curved section is 40-65mm.

Further, the push rod is provided with a self-locking mechanism.

The beneficial effects of the present invention are:

The head end cap of the present invention can effectively prevent calculus and gravel with larger particle size from entering the negative pressure suction channel by providing a barrier structure on the inlet side of the negative pressure suction channel, and can effectively prevent the negative pressure suction channel from being blocked. That is, it can ensure that the negative pressure suction effect will not fail, and the reliability is higher.

The ureteral sheath of the present invention can effectively drive the bending of the multi-lumen tube by setting the connected steel wire channel and the steel wire channel by using the push rod arranged in the operation part to drive the steel wire rope to expand and contract, so that the entry part can flexibly enter the target area in the patient's body; Since there is no outer hard sheath, the turning part is more flexible when performing bending movements, and there is no problem of damage to the multi-lumen tube due to the restriction of the hard sheath;

By setting the center of circle of the steel wire passage and the circle center of the negative pressure suction passage on the same diameter of the radial section of the multi-lumen tube, it can be ensured that when the multi-lumen tube is bent, the axis of the steel wire passage and the axis of the negative pressure suction passage are always on the same axis. On one plane, thereby overcoming the problem of inflexible and inaccurate operation caused by the angle between the plane where the axis line of the steel wire channel is located and the plane where the negative pressure suction channel is located when the existing multi-lumen tube is bent.

Description of drawings

In order to make the purpose, technical scheme and beneficial effect of the present invention clearer, the present invention provides the following drawings for illustration:

Fig. 1 is the structural representation of ureteral sheath embodiment of the present invention;

Fig. 2 is the structural representation of the first structure of head-end cap;

Fig. 3 is the structural representation of the second structure of head end cap;

Fig. 4 is the structural representation of the third structure of head end cap;

Fig. 5 is a structural schematic diagram of a fourth structure of a head-end cap;

Fig. 6 is a radial cross-sectional view of the multi-lumen tube.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

As shown in FIG. 1 , it is a schematic structural diagram of an embodiment of the ureteral sheath of the present invention. The ureteral sheath of this embodiment includes a working part and an operating part 1 , the working part includes a multi-lumen tube 2 , one end of the multi-lumen tube 2 is connected to the operating part, and a head end cap 3 is installed at the other end. The head end cap 3 of the present embodiment includes a head end cap body 4, a negative pressure suction channel 5 is arranged in the head end cap body 4, and a suction channel 5 is provided on the inlet side of the negative pressure suction channel 5 to prevent large-sized calculi and gravel from entering. to the barrier structure in the negative pressure suction channel. The head end cap body 4 of this embodiment includes a plug-in section 6, and the multi-lumen tube 2 is provided with a plug-in slot for matching with the plug-in section 6, and the multi-lumen tube 2 is provided with a negative suction channel 5 in communication with it. Pressure suction passage, the operation part 1 is provided with a negative pressure suction port in communication with the negative pressure suction passage.

The center of the negative pressure suction channel 5 of the present embodiment is provided with the holmium laser channel 7 coaxial with it, the center of the negative pressure suction channel is provided with the holmium laser channel 12 connected with the holmium laser channel 7, and the operating part is provided with a holmium laser channel 12 connected with the holmium laser channel 7. The holmium laser interface connected with the laser path. An image channel 8 is also provided in the head end cap body 4 of this embodiment, an image channel 13 communicating with the image channel 8 is provided in the multi-lumen tube 2 , and an image interface communicating with the image channel is provided in the operation part. In this embodiment, the head end cap body 4 is also provided with a water injection channel 9, the multi-lumen tube 2 is provided with a water injection channel 14 communicating with the water injection channel 9, and the operation part is provided with a water injection interface connected with the water injection channel. The head end cap body 4 of the present embodiment is also provided with a steel wire passage 10, and the multi-cavity tube 2 is provided with a steel wire passage 15 communicating with the steel wire passage 10, and the operating part is provided with a wire rope for driving the telescoping wire rope located in the steel wire passage. The push rod that drives the bending of the multi-lumen tube is provided with a self-locking mechanism on the push rod in this embodiment.

Specifically, the outer walls of the head-end cap 3 and the multi-lumen tube 2 are provided with a hydrophilic coating; this makes it easier for the head-end cap 3 and the multi-lumen tube 2 to enter the human urethra, and enables patients to have a better experience. The head end cap body 4 of this embodiment is made of SUS304 material, and the outer diameter of the multi-lumen tube 2 is 13F, and the maximum outer diameter of the head end cap 3 is less than or equal to 14F.

Further, the barrier structure is the barrier strip I11 arranged between the inner wall of the negative pressure suction channel and the outer wall of the holmium laser channel, the barrier strip I11 is located in the radial direction of the negative pressure suction channel 5, and the barrier strips I11 are uniformly arranged in a ring for at least two. As shown in Figure 2-5, they are structural schematic diagrams when the barrier strips I11 are set to 2, 3, 4 and 8 respectively. The entrance side of the negative pressure suction channel is divided into several grids by setting a barrier bar, which can effectively prevent stones and gravel with large particle size from entering the negative pressure suction channel, that is, it can ensure that the stones entering the negative pressure suction channel Gravel will not block the negative pressure suction channel. Of course, in some embodiments, the holmium laser channel may not be provided in the negative pressure suction channel 5. At this time, the barrier structure is the barrier bar II arranged in the negative pressure suction channel. Similarly, the barrier bar II is located in the negative pressure suction channel. The radial direction of the pressure suction channel, and at least two barrier strips II are uniformly distributed in a ring, the principles are equivalent and will not be described one by one.

Further, on the radial section of the multi-lumen tube 2, the center of circle of the steel wire path and the center of circle of the negative pressure suction path are located on the same diameter of the radial section of the multi-lumen tube 2; and when the multi-lumen tube 2 is bent, the center of the steel wire path The axis and the axis of the negative pressure suction passage are always on the same plane, as shown in FIG. 6 . The multi-lumen tube 2 of this embodiment includes an entry side section, a bent section used for stretching of the wire rope and a working rear section connected to the operating part 1, and the head end cap 3 is installed on the entry side section. The length of the bending section in this embodiment is 40-65 mm, the turning radius conforms to the size of the inner cavity of the human body, and the operation is flexible and convenient.

The ureteral sheath of this embodiment can effectively drive the multi-lumen tube to bend by setting the connected steel wire channel and the steel wire channel, and using the push rod set in the operation part to drive the steel wire rope to expand and contract, so that the entry part can flexibly enter the target area in the patient's body ; Since there is no outer hard sheath, the turning part is more flexible when performing bending actions, and there is no problem of damaging the multi-lumen tube due to the restriction of the hard sheath; by setting the center of circle of the steel wire passage and the center of the negative pressure suction passage as Located on the same diameter in the radial section of the multi-lumen tube, it can ensure that when the multi-lumen tube is bent, the axis of the steel wire passage and the axis of the negative pressure suction channel are always on the same plane, thus overcoming the problem of the existing multi-lumen tube when it is bent. Because there is a certain angle between the plane where the axis line of the steel wire passage is located and the plane where the negative pressure suction channel is located, the operation is inflexible and inaccurate.

The ureteral sheath of this embodiment, by setting a barrier structure at the inlet side of the negative pressure suction channel, can effectively prevent stones with larger particle sizes from entering the negative pressure suction channel, and can effectively prevent the negative pressure suction channel from being blocked. That is, it can ensure that the negative pressure suction effect will not fail, and the reliability is higher.

The above-mentioned embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention. The protection scope of the present invention shall be determined by the claims.

Claims (18)

1. A head end cap, it is characterized in that: comprise head end cap body, in described head end cap body, be provided with negative pressure suction channel, the entrance side of described negative pressure suction channel is provided with the calculus that is used to prevent large particle size Gravel enters the barrier structure in the negative pressure suction channel. 2 . The head end cap according to claim 1 , wherein a holmium laser channel coaxial therewith is provided at the center of the negative pressure suction channel. 3 . 3. The head-end cap according to claim 2, wherein the barrier structure is a barrier strip I arranged between the inner wall of the negative pressure suction channel and the outer wall of the holmium laser channel. 4. The head end cap according to claim 3, characterized in that: the barrier strip I is located in the radial direction of the negative pressure suction channel, and the barrier strip I is uniformly arranged in at least two rings . 5. The head end cap according to claim 1, characterized in that: the barrier structure is a barrier strip II arranged in the negative pressure suction channel. 6. The head end cap according to claim 5, characterized in that: the barrier strip II is located in the radial direction of the negative pressure suction channel, and the barrier strip II is uniformly arranged in at least two rings . 7. The head end cap according to claim 1, characterized in that: the head end cap body is made of SUS304 material. 8. The head-end cap according to any one of claims 1-7, characterized in that: an image channel, a steel wire channel and a water injection channel are also arranged in the head-end cap body. 9. A ureteral sheath, characterized in that: it includes a working part and an operating part, the working part includes a multi-lumen tube, one end of the multi-lumen tube is connected to the operating part, and the other end is installed with a device as claimed in claim 1- 8. For the head end cap according to any one of the above items, a negative pressure suction passage communicated with the negative pressure suction passage is provided in the multi-lumen tube, and a negative pressure suction passage communicated with the negative pressure suction passage is provided in the operation part. Negative pressure suction interface. 10. The ureteral sheath according to claim 9, characterized in that: the center of the negative pressure suction channel is provided with a holmium laser channel coaxial therewith, and the center of the negative pressure suction channel is provided with a channel coaxial with the holmium laser channel. connected to the holmium laser path, and a holmium laser interface connected to the holmium laser path is provided in the operating part. 11. The ureteral sheath according to claim 10, characterized in that: an image channel is also provided in the head end cap body, an image channel communicating with the image channel is provided in the multi-lumen tube, and the operation An image interface connected with the image path is arranged inside the interior. 12. The ureteral sheath according to claim 11, characterized in that: a water injection channel is also provided in the head end cap body, and a water injection channel communicating with the water injection channel is provided in the multi-lumen tube, and the operation There is a water injection interface connected with the water injection channel inside. 13. The ureteral sheath according to claim 9, characterized in that: the outer diameter of the multi-lumen tube is 13F, and the maximum outer diameter of the head-end cap is less than or equal to 14F. 14. The ureteral sheath according to any one of claims 9-13, characterized in that: a steel wire channel is also provided in the head end cap body, and a steel wire communicating with the steel wire channel is provided in the multi-lumen tube passage, the operating part is provided with a push rod for driving the steel wire rope in the steel wire passage to expand and contract, thereby driving the multi-lumen tube to bend. 15. The ureteral sheath according to claim 14, characterized in that: on the radial section of the multi-lumen tube, the center of circle of the steel wire channel and the center of circle of the negative pressure suction channel are located at the diameter of the multi-lumen tube. to the same diameter of the section; and when the multi-lumen tube is bent, the axis of the steel wire passage and the axis of the negative pressure suction passage are always on the same plane. 16. The ureteral sheath according to claim 15, characterized in that: the multi-lumen tube includes an entry side section, a curved section bent and deformed under the stretching of the steel wire rope, and a working rear section connected with the operating part , the head end cap is mounted on the entry side section. 17. The ureteral sheath according to claim 16, characterized in that: the length of the curved section is 40-65mm. 18. The ureteral sheath according to claim 14, characterized in that: said push rod is provided with a self-locking mechanism.