Improved ureter sheath

Abstract

The utility model provides an improved ureter sheath, which comprises an expanded sheath seat and a slender sheath tube, the size and shape of the sheath tube are suitable for entering a target area in a body through a body lumen, the sheath tube longitudinally extends from a near end to a far end, and the sheath tube defines a central channel longitudinally extending from the near end to the far end. The sheath base is coaxially connected to the near end of the sheath tube, a cavity communicated with the central channel is defined by the sheath base, the near end of the cavity is provided with an inlet allowing an instrument to enter, a sealing valve is arranged at the inlet, and the sealing valve comprises a passage penetrating through the sealing valve to allow the instrument to enter in a sealed mode; a connector communicated with the cavity is arranged on the sheath base, and the connector is suitable for being connected with external suction equipment so as to generate negative pressure in the central channel; a pressure regulating valve used for regulating the pressure in the cavity is arranged on the sheath seat, and the pressure regulating valve is arranged by avoiding a negative pressure suction path.

Description

Technical Field

[0001] The utility model belongs to the field of urology medical instruments, and in particular relates to an improved ureteral sheath. Background Art

[0002] Ureteral sheaths are used in urological surgeries to establish a pathway for endoscopes and other instruments to enter the urinary tract. In order to increase the service life and lumen support of the ureteral sheath, a spiral steel wire is embedded in the wall of the ureteral sheath to give the ureteral sheath strong elasticity and a certain hardness. It cannot be bent and shaped in a short distance, and the end of the ureteral sheath cannot approach the lesion area at close range. During the operation, some blood clots, small stones, and purulent flocs are not discharged from the ureteral sheath, which is not ideal. The end of the ureteral sheath is too hard and cannot be bent, resulting in an inability to approach the lesion area at close range, which increases the difficulty and time of the operation.

[0003] CN114451970B discloses an improved ureteral sheath, comprising a sheath tube and a sheath seat mounted at the proximal end of the sheath tube, the sheath seat comprising a tube section communicating with the sheath tube and a connecting portion disposed at the distal end of the tube section; the connecting portion comprising at least two clips disposed at the distal end of the tube section, the clips being bent inwardly relative to the central axis of the tube section; the sheath tube and the tube section integrally defining a central passage extending from the proximal end to the distal end; the sheath tube comprising a main section and a head section disposed at the distal end of the main section, the main section being composed of a rigid tube section, and the head section being composed of a deformable tube section; the tube section extending outwardly relative to its central axis to form a negative pressure pipe; the wall of the negative pressure pipe is provided with an open exhaust groove, the exhaust groove being sealed with a sliding cover, and the sliding cover being capable of sliding relative to the exhaust groove, and the open area of ​​the exhaust groove, thereby adjusting the negative pressure, can be adjusted by sliding the sliding cover. The device adjusts the negative pressure through a sliding cover, which may cause the extracted waste liquid to stain the user's hands, and requires the user to control the sliding cover of the side wall while holding the sheath seat, which is inconvenient to operate. Utility Model Content

[0004] In view of the above problems, the present invention provides an improved ureteral sheath, which includes an enlarged sheath seat and an elongated sheath tube. The size and shape of the sheath tube are suitable for entering a target area in the body through a body lumen and extending longitudinally from a proximal end to a distal end. The sheath tube defines a central channel extending longitudinally from the proximal end to the distal end. The sheath seat is coaxially connected to the proximal end of the sheath tube and defines a chamber communicating with the central channel. The proximal end of the chamber has an inlet for instruments to enter. A sealing valve is provided at the inlet. The sealing valve includes a passage therethrough for sealed entry of instruments.

[0005] The sheath seat is provided with a connector connected to the chamber, and the connector is suitable for connecting to an external suction device to generate negative pressure in the central channel;

[0006] The sheath seat is provided with a pressure regulating valve for adjusting the pressure in the chamber, and the pressure regulating valve is arranged to avoid the negative pressure suction path.

[0007] In some embodiments, the pressure regulating valve is disposed on the upper portion of the sheath seat.

[0008] In some embodiments, the pressure regulating valve includes a pressing part and a pressure relief pipe. The pressure relief pipe is set to pass through the chamber and is sealed and connected to the chamber. A valve is provided on the pressure relief pipe. The pressing of the pressing part controls the valve opening of the pressure relief pipe, and the valve opens to allow air to enter.

[0009] In some embodiments, the pressure regulating valve is located proximal to the connector.

[0010] In some embodiments, the sealing valve includes a conical sealing ring, which is arranged at the tube section of the sheath seat, and the conical sealing ring is formed for the instrument to pass through in a sealed manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A cross-sectional view of the structure of the ureteral sheath provided by the present invention (valve closed);

[0012] Figure 2 This is a structural cross-sectional view of the ureteral sheath provided by the utility model (valve closed). DETAILED DESCRIPTION

[0013] The following is a further detailed description of the present invention or the technical solution of the present invention through specific embodiments and in conjunction with the accompanying drawings.

[0014] In the description of the present invention, it should be understood that the terms "front", "rear", "head", "tail", "far", "near", "axial" and "radial" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0015] In the description of the present invention, it should be noted that, unless otherwise specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0016] See also Figure 1 and Figure 2, an embodiment of the present invention provides an improved ureteral sheath, which includes an enlarged sheath seat 20 and an elongated sheath tube 10. The size and shape of the sheath tube 10 are suitable for entering the target area 100 in the body through the body lumen, and extend longitudinally from the proximal end to the distal end. The sheath tube 10 defines a central channel 101 extending longitudinally from the proximal end to the distal end. The sheath seat 20 is coaxially connected to the proximal end of the sheath tube, and the sheath seat 20 defines a chamber 201 connected to the central channel. The proximal end of the chamber 201 has an inlet 202 for instrument entry, and a sealing valve 203 is provided at the inlet 202. The sealing valve 203 includes a passage passing through it for sealed entry of instruments such as endoscopes; a connector 205 connected to the chamber is provided on the sheath seat 20, and the connector 205 is suitable for connecting to an external suction device to generate negative pressure in the central channel; a pressure regulating valve for adjusting the pressure in the chamber is provided on the sheath seat 20, and the pressure regulating valve is arranged to avoid the negative pressure suction path. In this way, when excessive suction pressure causes excessive pressure in the renal pelvis, causing the organ to be flattened, air can be quickly introduced through the pressure-regulating valve to quickly relieve pressure and ensure the smooth progress of the surgery. The pressure-regulating valve is used to regulate the pressure of the chamber and is located away from the negative pressure suction path. That is, the pressure-regulating valve 3 is far away from the waste liquid discharge path. This way, manual operation of the pressure-regulating valve 3 does not contaminate the liquid, achieving a contactless and sterile operation. In addition, another advantage of the pressure-regulating valve is that when excessive suction pressure causes stone aspiration failure, the user needs to manually increase the suction force. Based on the pressure-regulating valve provided in this embodiment, by holding the sheath holder and repeatedly and rapidly controlling the state of the pressure-regulating valve, the pressure in the chamber fluctuates rapidly between relief and negative pressure. The repeated pressure fluctuations can produce a strong suction effect, making it easier to extract objects such as adsorbed or stuck stones. The rapidly changing pressure can generate sufficient impact force to help clear blockages and ensure the smooth flow of the suction channel. By controlling the pressure fluctuations, a stronger suction force can be provided when needed, improving the efficiency and success rate of the surgery.

[0017] In some embodiments, the pressure regulating valve 3 is arranged on the upper part of the sheath seat, which is convenient for the user to operate manually without having to go to the connector located on the side wall for operation, which is ergonomic and easy to operate.

[0018] In some embodiments of the present invention, the pressure regulating valve includes a pressing portion 31 and a pressure relief hose 32. The pressure relief hose 32 is connected to the chamber, and the pressing portion is connected to the pressure relief hose 32 (pressure relief chamber). The pressure relief hose is formed with an openable and closable valve 33. Thus, the user controls the opening and closing of the valve 33 by the force of pressing the pressing portion 31. For example, the pressing portion is connected to the pressure relief tube, and pressing the pressing portion can adjust the opening and closing of the valve thereon, thereby adjusting the volume of external air entering the chamber, thereby achieving pressure control and regulation.

[0019] For example, the pressure regulating valve is located on the proximal side of the connector, which completely prevents waste liquid from passing through the pressure regulating valve and eliminates the technical problems of hand contamination and inconvenience caused by the sliding cover operation in the prior art.

[0020] In some embodiments, the sealing valve includes a conical sealing ring, which is arranged at the tube section of the sheath seat, and the conical sealing ring is formed for the instrument to pass through in a sealed manner.

[0021] The ureteral sheath provided in this embodiment further comprises a conical sealing ring and a gland. The conical sealing ring is arranged in the tube section 20 of the sheath seat, and the conical sealing ring forms an entrance for the catheter to pass through in a sealed manner.

[0022] Throughout this specification, references to terms such as "one embodiment," "some embodiments," "specific examples," or "some examples" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0023] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An improved ureteral sheath, characterized in that: The ureteral sheath comprises an enlarged sheath seat and an elongated sheath tube, the size and shape of the sheath tube being suitable for entering a target area in the body through a body lumen and longitudinally extending from a proximal end to a distal end, the sheath tube defining a central channel longitudinally extending from the proximal end to the distal end, the sheath seat being coaxially connected to the proximal end of the sheath tube and defining a chamber communicating with the central channel, the proximal end of the chamber having an inlet for entry of an instrument, the inlet being provided with a sealing valve, the sealing valve including a passage therethrough for sealed entry of an instrument; The sheath seat is provided with a connector connected to the chamber, and the connector is suitable for connecting to an external suction device to generate negative pressure in the central channel; The sheath seat is provided with a pressure regulating valve for adjusting the pressure in the chamber, and the pressure regulating valve is arranged to avoid the negative pressure suction path.

2. The ureteral sheath according to claim 1, characterized in that The pressure regulating valve is arranged on the upper part of the sheath seat.

3. The ureteral sheath according to claim 1, characterized in that The pressure regulating valve includes a pressing part and a pressure relief pipe. The pressure relief pipe is set to pass through the chamber and is sealed and connected to the chamber. A valve is provided on the pressure relief pipe. The pressing of the pressing part controls the valve opening of the pressure relief pipe. When the valve is opened, air enters.

4. The ureteral sheath according to claim 1, wherein The pressure regulating valve is located on the proximal side of the connecting head.

5. The ureteral sheath according to claim 1, characterized in that The sealing valve comprises a conical sealing ring which is arranged at the pipe section of the sheath seat. The conical sealing ring is formed so as to allow the instrument to pass through in a sealed manner.

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