CN219579675U

CN219579675U - Ureter soft lens sheath

Info

Publication number: CN219579675U
Application number: CN202320812648.3U
Authority: CN
Inventors: 王建龙; 吕政通; 王浩然
Original assignee: Beijing Hospital
Current assignee: Beijing Hospital
Priority date: 2023-04-12
Filing date: 2023-04-12
Publication date: 2023-08-25
Anticipated expiration: 2033-04-12

Abstract

The utility model provides a ureteroscope sheath, which comprises: traction head, guiding sheath and expansion pipe, the expansion pipe is located the inner space of guiding sheath, and extend with guiding sheath each other in parallel in length direction, the expansion pipe is provided with the guidance pointed end in one end, the guidance pointed end has hollow toper shape, and hollow part and the inside intercommunication of expansion pipe, the traction head sets up the other end of keeping away from the guidance pointed end at the expansion pipe, and with the lateral wall fixed connection of the other end, be provided with the temperature control layer at the lateral wall medial surface of expansion pipe, the length that the temperature control layer extends the same with the length of expansion pipe in the length direction of the lateral wall of expansion pipe, and cover the inner peripheral surface of lateral wall in the inner peripheral direction of lateral wall, can control the degree of expansion pipe thermal deformation through the temperature of controlling this temperature control layer, thereby realized the nimble and subtle control of deformation to the expansion pipe, flexibility when using ureteroscope has been improved the doctor greatly.

Description

Ureter soft lens sheath

Technical Field

The utility model relates to the technical field of ureteral soft lenses, in particular to a ureteral soft lens sheath.

Background

With the development of technology, more and more devices have emerged to assist doctors in performing surgery, and these new devices and new techniques not only provide new means for alleviating patient pain, but also provide more treatment means for doctors. The advent of flexible ureteroscopes has provided a new means of diagnosis and treatment for urology, enabling doctors to more accurately view the condition of a patient and to perform accurate treatment, flexible ureteroscopes have generally required that a flexible sheath be placed in the urethra of the patient to provide access to and access to the flexible ureteroscope, but that current flexible sheaths have generally a fixed caliber, and that the caliber of the flexible sheath is also generally set to be larger in order to ensure smooth passage and flexibility of operation of the flexible ureteroscope, which causes great pain to the patient when the flexible sheath is placed, and even causes damage to the patient, for which there is a need for a flexible ureteroscope sheath that can provide different calibers for different patients.

Disclosure of Invention

The utility model provides a ureteral soft lens sheath, which aims to overcome the defect that the ureteral soft lens sheath in the prior art is fixed in caliber and large in caliber and cannot adapt to actual physical conditions of different patients.

To achieve the above object, an embodiment of the present utility model provides a ureteral soft lens sheath, including: a traction head, a guiding sheath and an expansion tube, wherein one end of the expansion tube is provided with a guiding tip, the guiding tip is provided with a hollow conical shape, the hollow part is communicated with the inside of the expansion tube, the traction head is arranged at the other end of the expansion tube far away from the guiding tip and fixedly connected with the side wall of the other end, the inner side surface of the side wall of the expansion tube is provided with a temperature control layer, the temperature control layer extends for the same length as the length of the expansion tube in the length direction of the side wall of the expansion tube and covers the inner peripheral surface of the side wall in the inner peripheral direction of the side wall,

a temperature sensor is provided at the other end of the expansion tube, one end of which is in contact with the temperature control layer to sense the temperature of the temperature control layer, wherein the expansion tube is made of a metal material having a heat expandable property.

According to the ureteroscope sheath provided by the embodiment of the utility model, the expansion tube made of the metal material capable of being expanded by heating is used, and the temperature control layer is arranged on the inner side of the side wall of the expansion tube, so that the temperature of the temperature control layer can be sensed by the temperature sensor at the other end of the expansion tube, the degree of heated deformation of the expansion tube can be controlled by controlling the temperature of the temperature control layer, flexible and fine control of the deformation of the expansion tube is realized, the flexibility of a doctor in using the ureteroscope is greatly improved, the degree of deformation of the expansion tube can be controlled by controlling the temperature of the temperature control layer according to different conditions of each patient, the caliber of the ureteroscope sheath can be suitable for the physical condition of a patient when the ureteroscope sheath is placed into the patient, and the pain brought to the patient due to the placement of the flexible endoscope sheath is reduced.

The foregoing description is only an overview of the present utility model, and is intended to be implemented in accordance with the teachings of the present utility model in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present utility model more readily apparent.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

fig. 1 schematically shows a schematic structural view of a ureteral soft lens sheath according to an embodiment of the present utility model.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

With the development of technology, more and more devices have emerged to assist doctors in performing surgery, and these new devices and new techniques not only provide new means for alleviating patient pain, but also provide more treatment means for doctors. The appearance of the ureteroscope provides a brand-new diagnosis and treatment means for urology surgery, so that doctors can more accurately check the illness state of patients and carry out accurate treatment.

Therefore, ureteroscope has been widely used for examination and treatment of urinary tract lesions on renal pelvis and ureter as an important diagnosis and treatment tool for urinary surgery. In the practical use process, a soft lens sheath is needed to be placed as an operation channel of the soft lens. 2022EAU urolithiasis guidelines indicate in use with respect to ureteral soft-lens sheaths that: hydrophilic coated ureteral soft lens sheaths with different calibres (inner diameter from 9F or more) can be inserted (through the guide wire) with the tip placed at the proximal end of the ureter. The ureteroscope sheath allows the ureteroscope to easily enter the upper urinary tract for many times, so that the ureteroscope technology is greatly promoted, and the diagnosis and treatment accuracy and treatment effect of doctors are improved. The use of a soft sheath can improve vision, reduce intra-renal pressure, and possibly reduce surgical time by creating a continuous fluid outflow tract. Despite the lower risk in existing systems, as described above, existing ureteral soft-lens sheaths have a large fixed caliber and thus may cause ureteral injury to the patient when inserted. Although there is no data on long-term side effects. While larger cohorts showed no difference in lithotomy rate and ureteral injury (stenosis rate of about 1.8%), they did show lower postoperative infection complications. The ureteral soft lens sheath is safe to use, can be used for treating large and multiple kidney stones, or can be used for a long period of time.

The diameter of the sheath used at present is fixed, namely the operation diameter is the same as the diameter of the pipe placing opening. However, the existing soft endoscope sheath usually has a fixed caliber, and in order to ensure smooth passing and operation flexibility of the ureteral soft endoscope, the caliber of the soft endoscope sheath is also usually set to be larger, which causes great transverse friction force and shearing force to be applied when the existing soft endoscope sheath is used for catheterization, so that ureteral injury of a patient is extremely easy to cause complications such as ureteral hemorrhage, avulsion and the like. In addition, because the physical conditions vary from patient to patient, it is also common that when a soft-covered sheath is applied to a patient, the patient cannot be placed smoothly due to the narrowing of the patient's ureteral congenital conditions, and thus the surgical procedure has to be altered.

To this end, as shown in fig. 1, an embodiment of the present utility model provides a ureteral soft endoscope sheath comprising a traction head 1, an introducer sheath 2 and an expansion tube 3.

The guide sheath 2 may have a cylindrical shape or a circular tube shape, and the expansion tube 3 may be located in the inner space of the guide sheath 2 and extend parallel to each other in the length direction with the guide sheath 2. For example, the introducer sheath 2 and the dilation tube 3 may form a nested configuration with the dilation tube 3 inserted into the introducer sheath 2.

The dilation tube 3 may be provided with a introducer tip 4 at one end. The introducer tip 4 may have a hollow tapered shape, for example, one end of the introducer tip 4 having a smaller inner diameter may be located at a side distant from the stent tube 3, and the other end may have the same tube diameter as that of the stent tube 3 so as to be closely coupled to the stent tube 3, and the hollow portion of the introducer tip 4 may communicate with the inside of the stent tube 3. In the embodiment of the present utility model, the inner diameter of the hollow portion of the introducer tip 4 may be smaller than the inner diameter of the dilation tube 3, to which the present utility model is not limited. Thus, in use, the dilation tube 3 may be guided gradually into the treatment site of the patient by means of the smaller inner diameter end of the introducer tip 4.

The traction head 1 can be arranged at the other end of the expansion tube 3 far from the guidance tip 4 and fixedly connected with the side wall of the other end, so that a doctor using the soft lens sheath can control the whole movement of the soft lens sheath by holding the traction head 1.

A temperature control layer 5 is provided on the inner surface of the side wall of the extension pipe 3. The temperature control layer 5 may extend the same length as the length of the stent in the longitudinal direction of the sidewall of the stent 3 and cover the inner circumferential surface of the sidewall in the inner circumferential direction of the sidewall. For example, the temperature control layer 5 may be formed to entirely cover the inner wall surface of the dilation tube 3, and in some embodiments of the utility model, the temperature control layer 5 may extend further into the introducer tip 4 and cover the inner surface of the introducer tip 4. For example, the temperature control layer 5 may include a water intake layer 51 and a water return layer 52. The water inlet layer 51 may be provided immediately adjacent to the inner surface of the side wall of the extension pipe 3, and the water inlet layer 51 communicates with a water inlet pipe at the other end of the extension pipe 3, i.e. the end to which the traction head 1 is fixed, and the water inlet pipe may be connected to a control pump located outside the extension pipe, so that the control pump may pump water or other heatable liquid into the water inlet layer 51 through the water inlet pipe and flow in the water inlet layer 51, thereby heating the wall of the extension pipe immediately adjacent to the water inlet layer 51. For example, a heating means for heating the pumped liquid may be further provided in the control pump, or the liquid may be heated outside the control pump, and the liquid heated to a desired temperature is fed into the control pump to temperature-control the wall of the expansion pipe 3 by the control pump being pumped into the water intake layer 51. In the embodiment of the present utility model, the expansion pipe 3 is made of metal having a thermal expansion characteristic, and thus, the water or other liquid heated to a predetermined temperature is pumped to the water inlet layer through the water inlet pipe at the control pump and the water or other liquid introduced flows in the water inlet layer 51 to spread over the entire water inlet layer 51 due to the pressure of the pumping, so that the entire temperature control of the pipe wall of the expansion pipe 3 can be performed. For example, the relationship between the deformation of the expansion tube 3 and the temperature may be measured and determined in advance, so that, in actual operation, water or other liquid heated to a specified temperature may be pumped into the water intake layer 51 according to the relationship between the deformation thus determined to heat the wall of the expansion tube 3, and since the water intake layer 51 is closely adhered to the inside of the wall of the expansion tube 3, the temperature of the water or other liquid in the water intake layer 51 which has been heated to a predetermined temperature may be directly transferred to the expansion tube 3, thereby causing the expansion of the expansion tube 3, and further causing the sheath sleeved on the outside of the expansion tube 3 to expand accordingly, so that the inside diameter of the treatment site of the patient may be enlarged.

The water return layer 52 may be located at a side of the water intake layer 51 remote from the side wall of the expansion pipe 3, and a heat insulating layer (not shown in the figure) may be provided between the water intake layer 51 and the water return layer 52. The water intake layer 51 and the water return layer 52 may have a communication portion 53 at one side of the introducer tip 4. At the communication portion 53, the water intake layer 51 and the water return layer 52 may communicate with each other so that water or other liquid in the water intake layer 51 may flow into the water return layer 52 through the communication portion 53, and since the water intake layer 51 is connected with a control pump, the water or other liquid in the water intake layer 51 may always flow toward the communication portion 53 under the pressure of the control pump, and then enter the water return layer 52 to flow back to the side of the temperature control layer 5 located at the traction head 1 and flow out to the outside through the water return pipe connected with the water return layer 52, and in the embodiment of the present utility model, the water return pipe may also be connected to the control pump so as to achieve a closed cycle of water flow, or in other embodiments, the water return pipe may also be connected to a container for receiving water return.

In addition, in the embodiment of the present utility model, the temperature control layer 5 may further include one or more heating wires, and a control part electrically connected to the heating wires may be further provided at the other end of the expansion pipe 3, i.e., the end connected to the traction head 1, so that the control part may provide power to the heating wires to heat the pipe wall of the expansion pipe 3, so that the expansion pipe 3 is expanded and deformed. In this embodiment, since the heating wire has an advantage of a rapid temperature rise, it is possible to improve a response speed to a doctor's manipulation at the time of treatment.

In the embodiment of the utility model, a temperature sensor 6 can also be arranged at the other end of the expansion tube 3, i.e. the end connected to the traction head 1. One end of the temperature sensor 6 may be brought into contact with the temperature control layer 5 to sense the temperature of the temperature control layer 5. For example, in the case where the temperature control layer 5 includes the water intake layer 51 and the water return layer 52, one end of the temperature sensor 6 may be inserted into the water intake layer 51 to sense the temperature of water or other liquid flowing into the water intake layer 51. Wherein the expansion tube is made of a metallic material having a heat expandable property. Further, in the case where the temperature control layer 5 includes heating wires, one end of the temperature sensor 6 may be in contact with one end of the heating wires on the side of the traction head 1 to sense the heating temperature of the heating wires. In an embodiment of the present utility model, the temperature sensor 6 may have a sensing terminal inserted into the return pipe to sense the temperature of the water flow in the return pipe.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims

1. A ureteral soft lens sheath, comprising: a drawing head, a guide sheath, and a drawing tube which is located in an inner space of the guide sheath and extends in parallel with each other in a length direction with the guide sheath, the drawing tube being provided at one end with a guide tip having a hollow tapered shape and the hollow portion communicating with an inside of the drawing tube, the drawing head being provided at the other end of the drawing tube which is away from the guide tip and fixedly connected with a side wall of the other end, a temperature control layer being provided at an inner side surface of a side wall of the drawing tube, the temperature control layer extending in a length direction of the side wall of the drawing tube as long as a length of the drawing tube and covering an inner peripheral surface of the side wall in an inner peripheral direction of the side wall,

2. The ureteral soft endoscope sheath according to claim 1, characterized in that the temperature control layer comprises a water intake layer adjacent to the inner surface of the side wall and a water return layer located on the side of the water intake layer remote from the side wall, and there is a thermal insulation layer between the water intake layer and the water return layer, the water intake layer and the water return layer having a communication portion on the introducer tip side of the expansion tube, the water intake layer having a water intake tube in communication with the other end of the expansion tube and the water return layer having a water return tube in communication with the other end of the expansion tube, the water intake tube being connected to a control pump located outside the expansion tube, the control pump having a heating device therein for heating the water intake tube.

3. The ureteroscope sheath according to claim 2, characterized in that the temperature sensor has a sensing terminal inserted into the return pipe to sense the temperature of the water flow in the return pipe.

4. The ureteroscope sheath according to claim 1, characterized in that the temperature control layer comprises a plurality of heating wires, and a control part electrically connected with the heating wires is provided at the other end of the expansion tube.

5. The ureteral soft endoscope sheath according to claim 1, characterized in that the introducer tip is made of a metallic material having heat expandable properties, and the temperature control layer further extends over the inner surface of the introducer tip.