CN220529990U

CN220529990U - Guiding sheath

Info

Publication number: CN220529990U
Application number: CN202321167525.5U
Authority: CN
Inventors: 韩铁工; 李亚舟; 张宁
Original assignee: Anhui Xingfu Gongchang Medical Equipment Co ltd
Current assignee: Anhui Xingfu Gongchang Medical Equipment Co ltd
Priority date: 2023-05-12
Filing date: 2023-05-12
Publication date: 2024-02-27
Anticipated expiration: 2033-05-12

Abstract

The utility model discloses an introducer sheath, which comprises a sheath tube, wherein the free end of the sheath tube can extend into a patient along a cavity of the patient; the sheath tube is provided with a suction channel and a sheath inner tube surrounding the suction channel; the sheath inner tube is provided with a sensor guide channel and a perfusion channel for perfusing perfusion liquid, and the perfusion liquid can flow out of the sheath tube from the perfusion channel and is sucked into the guide sheath from the suction channel and discharged out of the patient; the outer periphery of the sheath inner tube is sleeved with a sheath outer tube and a winding spring, and the winding spring is arranged between the sheath outer tube and the sheath inner tube. The utility model can simultaneously perfuse and attract perfusion liquid to realize continuous flushing and cleaning of the foreign matters on the affected part of the patient, and avoid blocking the operation vision by the foreign matters and blocking the perfusion channel by foreign matters accumulation.

Description

Guiding sheath

Technical Field

The utility model relates to the field of medical equipment, in particular to an introducer sheath.

Background

In clinical medicine, before retrograde ureteroscope operation, a ureteroscope guiding sheath is arranged in a ureter, so that the guiding of the ureteroscope and the real-time diversion of lavage liquid are realized, the visual field is kept clear, and the internal pressure of a renal pelvis is reduced.

In clinical surgery, since it is necessary to ensure a clear view of a ureteroscope, to alleviate thermal damage generated in laser lithotripsy, and to irrigate lithotripsy if necessary, a large amount of physiological saline is injected into the renal pelvis, thereby increasing the pressure in the patient's renal pelvis. The existing guiding sheath can not know parameter information such as pressure, temperature and the like in the renal pelvis in real time. Therefore, the fully irrigated physiological saline can not be reasonably sucked out at the same time. In addition, the existing guide sheath can not realize real-time control of temperature in operation, especially when holmium laser is used for lithotripsy, the local water temperature of the ureter can be raised to be very high in a short time due to the large laser energy, and the ureter thermal injury is likely to occur.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides an introducer sheath which can realize the real-time perfusion and attraction of perfusion liquid so as to realize the real-time flushing and cleaning of foreign matters on the affected part of a patient and avoid the foreign matters from blocking the operation vision.

The utility model is realized by the following technical scheme:

an introducer sheath comprising a sheath tube having a free end extendable into a patient along a patient lumen; the sheath tube is provided with a suction channel and a sheath inner tube surrounding the suction channel; the sheath inner tube is provided with a sensor guide channel and a perfusion channel for perfusing perfusion liquid, and the perfusion liquid can flow out of the sheath tube from the perfusion channel and is sucked into the guide sheath from the suction channel and discharged out of the patient; the outer periphery of the sheath inner tube is sleeved with a sheath outer tube and a winding spring, and the winding spring is arranged between the sheath outer tube and the sheath inner tube.

Further, a plurality of perfusion channels are arranged, and the perfusion channels are circumferentially distributed on the periphery of the suction channel.

Furthermore, the sheath inner tube adopts an integrated structure or a combined structure.

Further, the sheath inner tube comprises a first inner tube; the first inner tube is composed of at least one inner tube, and each inner tube is provided with at least one pouring channel.

Further, the sheath inner tube further comprises a second inner tube; the first inner tube is arranged between the sheath outer tube and the winding spring, the second inner tube is in butt joint with the inner wall of the winding spring, and the second inner tube is hollow and is provided with the suction channel.

Further, a sensor probe is arranged in the sensor guide channel and is arranged at the free end of the sheath inner tube; the sensor probe is connected with a sensor lead wire which extends from the sensor probe to the outside of the guide sheath.

Further, the guiding sheath further comprises a main body pipe connected with the sheath pipe, the main body pipe is provided with a connector connected with the sheath pipe, the connector is provided with a wire passing hole, and the sensor lead wire penetrates through the wire passing hole and extends to the outside of the guiding sheath.

Further, the main body tube is provided with a buffer cavity, the buffer cavity is respectively communicated with the perfusion channel, the sensor guide channel and the wire passing hole, and the sensor lead wire in the sensor guide channel can sequentially extend to the buffer cavity, the wire passing hole communicated with the buffer cavity and penetrate out of the guide sheath from the wire passing hole.

Further, a sealing piece is arranged in the wire passing hole, and the sealing piece is sleeved on the sensor lead wire and can seal the wire passing hole.

Further, at least one sensor guide channel is arranged, and a sensor probe is arranged in each sensor guide channel; the sensor probe is a pressure probe or a temperature measurement probe.

Compared with the prior art, the utility model has the advantages that:

1. by arranging the independent perfusion channel, the perfusion liquid can be introduced into the affected part of the patient to wash the affected part of the patient while sucking out the perfusion liquid, so that the suction channel is prevented from being blocked due to the fact that a plurality of foreign matters are accumulated in the suction channel together when the foreign matters are absorbed by the suction channel due to the accumulation of the foreign matters; the continuous filling and the continuous suction of the filling liquid can be realized, and the large flow of the filling liquid takes away the foreign matters in a negative pressure state; the perfusion liquid can also avoid friction between the foreign matters and the inside of the sheath tube when the foreign matters are directly attracted, so that the flow rate of the foreign matters discharged out of the patient is uniform and the efficiency is high, and the service life of the sheath tube can be prolonged.

2. By arranging the sensor probe, the real-time measurement of different parameters in the renal pelvis of the patient is realized, so that medical staff can know the conditions in the renal pelvis of the patient in the operation process, and can perform corresponding operation; by arranging the temperature probe and the pressure probe, the real-time monitoring of the pressure and the temperature in the renal pelvis of the patient is realized, so that the safety in the operation process is improved, the speed and the flow of the perfusion liquid can be adjusted according to the pressure and the temperature in the renal pelvis of the patient, and the safety in the operation process is further improved.

3. The sensor lead wire is convenient to extend to the outside of the guide sheath by arranging the wire through hole; and, set up the sealing member in the via hole, can prevent that the filling liquid in the buffer chamber from spilling out from the via hole.

Drawings

FIG. 1 is a plan sectional view of an introducer sheath according to a preferred embodiment of the utility model;

FIG. 2 is an enlarged view of circle A of FIG. 1;

FIG. 3 is an enlarged view of circle B of FIG. 1;

FIG. 4 is a cross-sectional view taken along section E-E of FIG. 1;

FIG. 5 is a cross-sectional view of still another configuration of the sheath of FIG. 1 taken along section E-E;

FIG. 6 is a cross-sectional view taken along section E-E of yet another configuration of the sheath of FIG. 1;

fig. 7 is a cross-sectional view taken along section E-E of yet another configuration of the sheath of fig. 1.

Detailed Description

The technical scheme of the utility model is further described in non-limiting detail below with reference to the preferred embodiments and the accompanying drawings. In the description of the present utility model, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. refer to the azimuth or positional relationship based on the azimuth or positional relationship shown in the drawings. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

As shown in fig. 1, an introducer sheath according to a preferred embodiment of the present utility model includes a sheath tube 1 and a main body tube 3 connected to the sheath tube 1. The sheath tube 1 can freely enter the patient body from the patient cavity such as ureter and extend to the affected part of the patient; sheath 1 may be extended along the patient's ureter to the patient's renal pelvis or at a stone within the ureter, such as in the case of retrograde ureteral soft microscopy. The main body tube 3 is positioned outside the patient body, and medical staff can penetrate and extend surgical instruments such as ureteroscope from the main body tube 3 into the sheath tube 1 so as to reach the affected part of the patient for operation.

With further reference to fig. 2 to 7, the sheath tube 1 is provided with a suction channel 11 and a sheath tube 12 surrounding the suction channel 11. The sheath tube 12 is provided with a sensor guide channel 121 and a perfusion channel 122 for perfusion of perfusion liquid. Specifically, the sheath tube 1 further includes a sheath outer tube 15 and a wrap spring 16 provided between the sheath inner tube 12 and the sheath outer tube 15. The wrap spring 16 may be used to enhance the strength of the sheath 1. Wherein the interior of the sheath tube 12 is hollow and forms the suction channel 11. The side wall of the sheath tube 12 is provided with a sensor guide channel 121 and a perfusion channel 122. The suction channel 11 may be used to suck stone fragments, perfusion liquid, etc. in the renal pelvis of a patient, and may also be used as a channel for surgical instruments such as ureteroscope to enter the renal pelvis of a patient.

The pouring channel 122 and the suction channel 11 are separated from each other, and the pouring channel 122 and the suction channel 11 each extend from the top of the sheath 1 to the bottom of the free end 13 of the sheath 1 in the axial direction of the sheath 1. Irrigation fluid may flow out of the bottom of the sheath 1 along the irrigation channel 122 to reach into the patient's renal pelvis and be sucked from the aspiration channel 11 out of the patient's renal pelvis to effect drainage of the irrigation fluid. Wherein, normal saline can be used as the perfusion liquid.

The sensor guide channel 121 penetrates through the sheath tube 1, and the sensor probe 2 is arranged in the sensor guide channel 121. The sensor probe 2 is arranged at the free end 13 of the sheath tube 12 and the sensor probe 2 is flush with the end surface of the free end 13 of the sheath tube 1 or is retracted inside the sheath tube 1. The sensor probe 2 is connected with a sensor lead wire 21, and the sensor lead wire 21 extends from the sensor probe 2 to the outside of the guide sheath so that the sensor lead wire 21 can be connected with an external host. The sensor probe 2 monitors various parameters of the free end 13 of the sheath 1 extending into the patient's renal pelvis in real time and transmits the monitored parameter information to an external host computer through the sensor lead wire 21. The external host can process the parameter information and then display the processed parameter information in the display screen for medical staff to observe.

The sensor guide channels 121 are provided with at least one, and one sensor probe 2 is provided in each sensor guide channel 121. The sensor probe 2 is a pressure probe 23 or a temperature probe 22. Specifically, as shown in fig. 4, two sensor guide channels 121 are provided. One sensor guide channel 121 is internally provided with a temperature measuring probe 22, and the other sensor guide channel 121 is internally provided with a pressure probe 23. In addition, as shown in fig. 5 and 6, the sensor guide passage 121 may be provided as one, and the sensor guide passage 121 may be used for placing the temperature probe 22 or the pressure probe 23.

With further reference to fig. 3, in order to facilitate the pressure measurement by the pressure probe 23, a pressure measurement hole 17 is formed in the side wall of the sheath tube 1, one end of the pressure measurement hole 17 is communicated with a sensor guide channel 121 in which the pressure probe 23 is placed, and the other end is communicated with the outside. The pressure taps 17 are provided with at least two. Preferably, the pressure taps 17 are provided in two.

The main body pipe 3 includes a connection pipe 33, a water injection pipe 34 and a negative pressure suction pipe 35 extending outward from the side wall of the connection pipe 33. The inside of the connection pipe 33 is hollow and formed with a working channel 331, and one end of the connection pipe 33 is provided with a sealing ring 36 and the other end is provided with a connection head 31. The connector 31 may be used to connect the sheath 1 to mount the sheath 1 to the main body tube 3. The surgical instrument can be inserted from the sealing ring 36 of the connecting tube 33 into the working channel 331 in the main body tube 3, so that the surgical instrument can be inserted into the sealing ring 36 to seal the joint between the surgical instrument and the main body tube 3 by the sealing ring 36. The working channel 331 communicates with the aspiration channel 11 such that surgical instruments can extend from the working channel 331 into the aspiration channel 11 and into the affected part of the patient.

The negative pressure suction pipe 35 is hollow inside and formed with a negative pressure passage 351, and the negative pressure suction pipe 35 is connected with a negative pressure suction device (not shown). The negative pressure passage 351 communicates with the working passage 331 and communicates with the suction passage 11 through the working passage 331. The negative pressure suction device can provide negative pressure suction force for the negative pressure channel 351, and the suction channel 11 communicated with the negative pressure channel 351 generates suction force so as to suck the substances such as stone fragments, perfusion liquid and the like of the affected part of the patient. In order to facilitate the adjustment of the suction force of the suction channel 11, the negative pressure suction tube 35 is provided with a negative pressure regulator 352 for adjusting the magnitude of the negative pressure in the negative pressure channel 351 and thus the suction force of the suction channel 11, wherein the negative pressure regulator 352 is widely used in the prior art, and therefore will not be described herein.

The water injection pipe 34 is hollow inside and formed with a water injection passage 341, and a water injection pump (not shown) is connected to the water injection pipe 34. The water injection pump may inject a perfusion liquid into the water injection tube 34. The water filling channel 341 communicates with the filling channel 122. Specifically, in order to make the pressure and the flow rate of the perfusion fluid flowing to the perfusion channel 122 more stable and balanced, a buffer cavity 32 is provided at the connection between the perfusion channel 341 and the perfusion channel 122. The water filling channel 341 is communicated with the buffer cavity 32 and is communicated with the filling channel 122 through the buffer cavity 32

In order to separate the water injection passage 341 from the working passage 331, the connection pipe 33 is provided with a partition wall 332. The partition wall 332 is disposed between the working channel 331 and the buffer chamber 32, and one end of the partition wall 332 extends to abut against the sheath 1 and the abutment of the partition wall 332 with the sheath 1 is located inside the pouring channel 122 such that the pouring channel 341 and the pouring channel 122 are located on the same side of the partition wall 332 and are communicated. Therefore, the perfusion liquid in the water injection channel 341 flows to the perfusion channel 122 under the action of the partition wall 332, so that the negative pressure in the negative pressure channel 351 is prevented from influencing the flow direction of the perfusion liquid in the water injection channel 341, that is, the negative pressure channel 351 directly attracts the perfusion liquid in the water injection channel 341 into the negative pressure channel 351.

Buffer chamber 32 is an annular chamber. The bottom of the buffer chamber 32 communicates with the top of the perfusion channel 122, and the cross-sectional area of the bottom of the buffer chamber 32 is larger than the perfusion channel 122. When the filling liquid enters the buffer chamber 32, the filling liquid firstly enters the buffer chamber 32 to form annular water flow and then flows to the filling channel 122 due to the larger sectional area of the bottom of the buffer chamber 32. By arranging the buffer cavity 32, the perfusion liquid can form annular water flow in the buffer cavity 32 after entering from one side of the main body pipe 3, and then flows to the perfusion channel 122, so that the pressure and the flow of the perfusion liquid flowing to the perfusion channel 122 in all directions are balanced, and the pain of a patient caused by overlarge local pressure of the perfusion liquid is avoided.

The connector 31 is connected to the sheath 1. The connector 31 is provided with a wire through hole 311, and the sensor lead wire 21 is arranged through the wire through hole 311 and can extend to the outside of the guide sheath. Specifically, the buffer cavity 32 is respectively communicated with the perfusion channel 122, the sensor guide channel 121 and the wire passing hole 311, and the sensor lead wire 21 in the sensor guide channel 121 can extend from the top end of the sheath 1 to the buffer cavity 32 and pass out of the wire passing hole 311 communicated with the buffer cavity 32.

In order to prevent the perfusion liquid in the buffer cavity 32 from flowing out of the via hole 311, a sealing member 312 is arranged in the via hole 311, and the sealing member 312 is sleeved on the sensor lead wire 21 and can seal the via hole 311. The seal 312 may be disposed at the junction of the via 311 and the buffer chamber 32 or at other locations within the via 311. Further, to prevent the perfusion liquid in the buffer cavity 32 from flowing into the sensor guide channel 121, the sensor guide channel 121 may be sealed after penetrating into the sensor lead wire 21, and the sealing may be at the connection between the sensor guide channel 121 and the buffer cavity 32 or the sealing of the sensor guide channel 121.

In use, the free end 13 of the sheath 1 is extended into the patient's renal pelvis along the patient ureter. The temperature probe 22 and the pressure probe 23 of the free end 13 of the sheath 1 monitor the pressure and temperature in the patient's renal pelvis in real time. When the pressure in the patient's renal pelvis is too high, the infusion of the perfusion fluid is reduced. When the temperature within the patient's renal pelvis is too high, then the infusion rate of the perfusion fluid is increased and simultaneously the negative pressure suction within the negative pressure channel 351 is increased to increase the flow rate of the perfusion fluid to remove more heat. By arranging the sensor probe 2, the real-time measurement of different parameters in the renal pelvis of a patient is realized, so that medical staff can conveniently know the conditions in the renal pelvis of the patient in the operation process, and can conveniently carry out corresponding operation; by arranging the temperature probe 22 and the pressure probe 23, the pressure and the temperature in the renal pelvis of a patient are monitored in real time, the injection and the aspiration speed and the aspiration flow rate of the perfusion liquid can be conveniently adjusted according to different pressures and temperatures, and the safety in the operation process is improved. By providing the wire passing hole 311, the sensor lead wire 21 is conveniently extended to the outside of the guide sheath; further, the sealing member 312 is provided in the via hole 311, so that the filling liquid in the buffer chamber 32 can be prevented from leaking out of the via hole 311. By adopting the perfusion channel 122 and the suction channel 11 which are mutually separated, the perfusion liquid can be injected into the renal pelvis of the patient to be washed and the washed perfusion liquid can be recovered at the same time in the operation process, so that the real-time cleaning of the renal pelvis of the patient is realized; and, the infusion and recovery of the irrigation fluid are performed simultaneously to avoid excessive pressure in the patient's renal pelvis and to reduce the surgical time.

The foregoing examples illustrate only a few embodiments of the utility model and are described in detail herein without thereby limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. An introducer sheath, characterized in that it comprises a sheath tube (1), the free end (13) of the sheath tube (1) being extendable into the patient along the patient's lumen; the sheath tube (1) is provided with a suction channel (11) and a sheath inner tube (12) surrounding the suction channel (11); the sheath inner tube (12) is provided with a sensor guide channel (121) and a perfusion channel (122) for perfusing perfusion liquid, and the perfusion liquid can flow out of the sheath tube (1) from the perfusion channel (122) and is sucked into the guide sheath from the suction channel (11) and discharged out of the patient; the outer periphery of the sheath inner tube (12) is sleeved with a sheath outer tube (15) and a winding spring (16), and the winding spring (16) is arranged between the sheath outer tube (15) and the sheath inner tube (12).

2. The introducer sheath according to claim 1, wherein a plurality of perfusion channels (122) are provided, the perfusion channels (122) being circumferentially distributed around the periphery of the suction channel (11).

3. The introducer sheath according to claim 1, characterized in that the sheath inner tube (12) is of a unitary or modular construction.

4. The introducer sheath according to claim 3, wherein the sheath inner tube (12) comprises a first inner tube (124); the first inner tube (124) is composed of at least one inner tube (123), and each inner tube (123) is provided with at least one pouring channel (122).

5. The introducer sheath according to claim 4, wherein the sheath inner tube (12) further comprises a second inner tube (125); the first inner tube (124) is arranged between the sheath outer tube (15) and the winding spring (16), the second inner tube (125) is in contact with the inner wall of the winding spring (16), and the second inner tube (125) is hollow and is provided with the suction channel (11).

6. The introducer sheath according to any one of claims 1 to 5, characterized in that a sensor probe (2) is provided in the sensor guide channel (121), the sensor probe (2) being provided at the free end (13) of the sheath tube (12); the sensor probe (2) is connected with a sensor lead wire (21), and the sensor lead wire (21) extends from the sensor probe (2) to the outside of the guide sheath.

7. The guiding sheath according to claim 6, characterized in that the guiding sheath further comprises a main body tube (3) connected with the sheath tube (1), the main body tube (3) is provided with a connector (31) connected with the sheath tube (1), the connector (31) is provided with a wire passing hole (311), and the sensor lead wire (21) penetrates through the wire passing hole (311) and extends to the outside of the guiding sheath.

8. The guiding sheath according to claim 7, characterized in that the main body tube (3) is provided with a buffer cavity (32), the buffer cavity (32) is respectively communicated with the perfusion channel (122), the sensor guiding channel (121) and the wire passing hole (311), and the sensor lead wire (21) in the sensor guiding channel (121) can sequentially extend to the buffer cavity (32) and the wire passing hole (311) communicated with the buffer cavity (32) and penetrate out of the guiding sheath from the wire passing hole (311).

9. The guiding sheath according to claim 8, characterized in that a sealing element (312) is arranged in the wire passing hole (311), and the sealing element (312) is sleeved on the sensor lead wire (21) and can seal the wire passing hole (311).

10. The introducer sheath according to claim 9, characterized in that at least one sensor guide channel (121) is provided, one sensor probe (2) being provided in each sensor guide channel (121); the sensor probe (2) is a pressure probe (23) or a temperature measuring probe (22).