CN218045201U - Endoscope tip cap pipe - Google Patents

Abstract

The utility model discloses an endoscope tip cap conduit, which comprises a tip cap, a sheath tube and a joint which are connected in sequence, wherein the joint is used for providing an opening for external auxiliary surgical instruments to enter the sheath tube; the front end cap is internally provided with at least two through channels which are arranged in parallel, and the through channels comprise a first through channel used for connecting the sheath tube and a second through channel used for installing the endoscope, so that the sheath tube and the endoscope are arranged in parallel; the distal end of the sheath has a bendable section with a length that completely covers the bendable portion of the endoscope. The utility model discloses an endoscope has increased the passageway that can be used to other auxiliary instrument entering more, can effectively avoid only passing in and out the apparatus repeatedly through a passageway and reduce operation efficiency.

Description

Endoscope tip cap pipe

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to endoscope tip cap pipe for draw pincers to provide the apparatus passageway respectively for endoscope and operation under the mirror.

Background

In Endoscopic mucosal dissection, methods have been invented to assist Endoscopic mucosal dissection (ESD) in order to improve the visual field and increase the visualization of submucosa. The tissue forceps assisting traction method is to use different paths to extend the tissue forceps into a human body to assist in traction the tissue to complete resection. Since most enteroscopes have only one instrument channel, the tissue forceps are held by the forceps in the instrument channel of the endoscope and enter the endoscope as the tissue forceps enter the gastrointestinal tract of the patient. Two tissue forceps are needed in the process, the tissue forceps fall off and the mucosa of a patient is damaged in the moving process, the preoperative operation time is long, the operation efficiency is low, the potential safety hazard is large, and medical accidents are easy to happen.

Accordingly, there is a need for a tip cap catheter that can be attached to an endoscope and additionally provide an instrument channel.

Chinese patent document CN211511728U discloses an endoscope auxiliary tube, which comprises a transparent cap and an auxiliary tube; the transparent cap is used for being installed at the front end of a lens of the endoscope, the auxiliary pipeline and the transparent cap are detachably connected, and surgical equipment can penetrate through a tube cavity of the auxiliary pipeline. The endoscope auxiliary tube provides a new channel for surgical equipment to extend into an organ by connecting the auxiliary tube with the transparent cap at the front end of the lens.

Chinese patent document CN214965363U discloses an endoscope auxiliary device, which comprises an instrument channel assembly, a front water injection channel assembly and an elastic connector; the instrument channel assembly and the front water injection channel assembly are arranged in parallel, and an endoscope diagnosis and treatment instrument is arranged in the instrument channel assembly, so that the endoscope can allow two endoscope diagnosis and treatment instruments to be used simultaneously; the elastic connecting piece clamps on the pipe body of apparatus channel subassembly and preceding water injection channel subassembly, and elastic connecting piece includes elasticity staple bolt and confession the apparatus channel subassembly passes through with preceding water injection channel subassembly pore, places the mirror body of fixed endoscope in the cavity of elasticity staple bolt.

Both above, although the auxiliary channel in CN211511728U or the instrument channel assembly in CN214965363U can be connected to the endoscope and an additional instrument channel is provided, in practice, there are following disadvantages: (1) Because a doctor needs to operate the endoscope to bend the head of the endoscope, no corresponding bending section is arranged at the joint of the front end of the auxiliary pipeline in CN211511728U or the instrument channel assembly in CN214965363U and the endoscope, namely, a section of the sheath tube connected with the end cap corresponding to the bending part of the endoscope can not be bent, and under the condition that the deflection angle of the endoscope is large, the sheath tube can not be synchronously bent along with the endoscope, the follow-up property is poor, the stress of the sheath tube is increased, the operation is difficult, and even the sheath tube can fall off; (2) For the specific situation that the bendable grasping forceps are applied in the ESD operation, the direction of the forceps head can be adjusted by the bendable grasping forceps, the auxiliary pipeline in CN211511728U or the front end cap structure of the instrument channel assembly in CN214965363U, which is connected with the endoscope head, is not provided with a space for the bendable grasping forceps to operate in a bent state, under the condition that the far end of the grasping forceps is bent, the end face flush with the front end cap cannot accommodate the head end of the grasping forceps which is bent towards the endoscope lens, and at the moment, the grasping forceps must be pushed forwards, so that the operation radius required by the grasping forceps is increased, the grasping forceps cannot operate in a narrow space, the operation efficiency is low, and the applicability is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the defects of the prior art, providing an additional instrument channel in the endoscopic surgery, reducing the working radius of the traction forceps and improving the following property and the adaptability.

In order to achieve the above object, the present invention provides an endoscope tip cap catheter, comprising a tip cap, a sheath tube and a joint, which are connected in sequence, wherein the joint is used for providing an opening for an external auxiliary surgical instrument to enter the sheath tube; the tip cap is internally provided with at least two through channels which are arranged in parallel and comprise a first through channel for connecting the sheath tube and a second through channel for installing the endoscope, so that the sheath tube and the endoscope are arranged in parallel; the distal end of the sheath has a bendable section, the length of which completely covers the bendable portion of the endoscope.

Further, a step protruding inwards is arranged in the second through channel and used for blocking a lens of the endoscope.

Furthermore, an interlayer is arranged between one section of the starting end of the first through channel and one section of the starting end of the second through channel to form an interlayer section, one section of the tail end of the first through channel is communicated with one section of the tail end of the second through channel through a notch to form a notch section, and the interlayer section is adjacent to the notch section.

Further, the length of the notch section is greater than the distance between the step and the distal end face of the tip cap.

Further, the distal end of the first through passage on the tip cap is beveled.

Further, the height of the inclined surface is greater than the inner diameter of the first through passage and does not exceed 1/2 of the height of the front end cap.

Further, the bendable segment has a plurality of slits.

Furthermore, the opening penetrates through the pipe wall.

Furthermore, the inner wall of the gap is provided with a soft membrane.

Further, a plurality of the gaps extend along the axial direction and are arranged in the following mode in the radial direction: on the same radial section, a plurality of gaps are arranged at intervals along the circumference; or, on the same radial cross section, only one opening which is not fully distributed on the circumference is arranged; or, on the same radial section, only one opening is distributed on the circumference; in the former two radial arrangement modes, the positions of the gaps on the adjacent radial cross sections are consistent or staggered.

Further, the bendable section is a single-wall corrugated pipe; the outer wall of the single-wall corrugated pipe is as follows: sequentially progressive annular structures; alternatively, a single helix structure; or, a plurality of helices.

Further, the tip cap is molded from a silicone rubber or a thermoplastic polyurethane elastomer.

Further, the sheath tube is formed by one of nylon, high-density polyethylene and metal subjected to insulation treatment.

Compared with the prior art, the beneficial effects of the utility model reside in that:

1. a channel for other auxiliary instruments to enter is additionally arranged for the endoscope, and the reduction of the operation efficiency caused by the repeated entering and exiting of the instruments through only one channel can be effectively avoided.

2. The bendable section is arranged on the sheath tube corresponding to the bending part of the endoscope, so that the sheath tube is easy to bend in multiple directions, has good following performance with the bending part of the endoscope, and is beneficial to reducing the working radius of other auxiliary instruments.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a schematic structural view of a tip cap according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a prior art tip cap;

fig. 4 is a cross-sectional view of a tip cap according to an embodiment of the present invention;

fig. 5 is a diagram illustrating the use of the tip cap according to an embodiment of the present invention;

fig. 6 is a usage status diagram of an embodiment of the present invention.

In the figure:

1-first end cap; 11-a first through channel; 12-a second through channel; 121-step; 13-a notch; 14-inclined plane; 15-an interlayer; 2-a sheath; 21-a bendable section; 211-gap; 3-a linker; a-an endoscope; b-traction forceps.

Detailed Description

Other advantages and effects of the present invention will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses preferred embodiments of the present invention. The present invention can be implemented or applied by other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

It should be noted that the terms "upper", "lower", "left", "right", "front", "middle", "back", "bottom", "top", "inner", "outer", and the like as used herein refer to the orientation shown in the drawings. This is for convenience of description and is not intended as any limitation on the invention.

As shown in fig. 1-2, an embodiment of the endoscope tip cap guide of the present invention comprises a tip cap 1, a sheath 2 and a connector 3 connected in sequence, wherein the connector 3 is used for providing an opening for external auxiliary surgical instruments to enter the sheath 2; the end-first cap 1 is internally provided with at least two through channels which are arranged in parallel, and comprises a first through channel 11 for connecting the sheath tube 2 and a second through channel 12 for installing an endoscope, so that the sheath tube 2 and the endoscope are arranged in parallel; the distal end of the sheath 2 has a bendable section 21, and the length of the bendable section 21 completely covers the bendable portion of the endoscope.

In this embodiment, the distal end cap guide tube may be connected to the lens of the endoscope a, and an additional instrument channel for the insertion and removal of the pulling forceps B is provided. The bendable part of the endoscope A and the position of the bendable section 21 at the distal end of the sheath 2 are overlapped and adjacent side by side, and as long as the bendable part of the endoscope A performs bending action, the bendable section 21 can be bent along with the bending, the follow-up property is good, and the operation radius can be effectively reduced. Specifically, the sheath tube 2 connected to the end cap 1 can be fixed to the endoscope a along with the end cap 1, so that a channel is added to the endoscope a, and the cooperative operation of multiple instruments under the endoscope is facilitated. The end cap 1 is designed into a double-channel structure, and besides a second through channel 12 for installing the endoscope A, a first through channel 11 is additionally provided and can be used as an instrument channel of the traction forceps B, so that conditions are created for better assisting traction.

In one embodiment, the second through channel 12 has an inwardly protruding step 121 disposed therein, the step 121 being configured to block a lens of the endoscope a. In this embodiment, the step 121 is equivalent to an adjuster for the depth of the lens of the endoscope a extending into the second through channel 12, and the axial position of the step 121 in the second through channel 12 can be set according to actual needs, for example, for different patients, the position of the lesion can be preliminarily determined according to the previous image information, and accordingly, the proper position of the step 121 is selected, that is, the tip caps 1 with different specifications are selected.

In one embodiment, as shown in fig. 4 to 5, a partition layer 15 is provided between a section of the starting end of the first through channel 11 and a section of the starting end of the second through channel 12 to form a partition layer section, and a section of the end of the first through channel 11 and a section of the end of the second through channel 12 are communicated through a gap 13 to form a gap section, and the partition layer section is adjacent to the gap section. In this embodiment, when the physician operates the traction forceps B to bend downward, the bending portion of the traction forceps B passes downward through the notch 13, and the bending section of part of the traction forceps B is accommodated, so that compared with the existing structure shown in fig. 3 (no notch exists between the two channels, and the whole course is the interlayer), the forceps head of the traction forceps B is closer to the instrument channel of the endoscope a, and it is more convenient to cut the diseased tissue grasped by the forceps head of the traction forceps B by using the surgical tool in the instrument channel of the endoscope a. The notch 13 arranged on the end-first cap 1 is matched with the traction forceps B, so that a part of the bent forceps head of the traction forceps B is positioned in the end-first cap 1, the distance between the forceps head and the lens of the endoscope A is shortened, and the operation can be carried out in a narrower space.

In one embodiment, the length of the notch section is greater than the distance between the step 121 and the distal end face of the tip cap 1. In the embodiment, the opening position of the notch 13 is ensured to be matched with the position of the nipper behind the lens of the endoscope.

In one embodiment, as shown in fig. 4-6, the tip cap 1 has a bevel 14 at the distal end of the first through passage 11. In this embodiment, the inclined plane 14 is located at a position on the distal end cap 1 directly contacting with the mucosa of the human body, so that the force application direction to the mucosa can be changed, and the force application area can be increased, so that the distal end cap catheter 2 can easily separate the mucosa when entering the human body along with the endoscope a, thereby avoiding the injury to the tissue of the human body, and solving the problem that the mucosa is not easily separated without damage because the distal end of the distal end cap is too flat at present. Meanwhile, as shown in fig. 5, compared with the existing structure shown in fig. 3 (without an inclined plane, the movable range at the outlet of the passage is small when the traction forceps B is bent upward), the movable range at the outlet of the first through passage 11 is large when the physician operates the traction forceps B to be bent upward, and the movable range accessible to the forceps head is larger, which is more favorable for quickly finding and grasping the lesion tissue.

In one embodiment, the height of the ramp 14 is greater than the inner diameter of the first through-channel 11 and does not exceed 1/2 of the height of the tip cap 1. In this embodiment, the radial height of the inclined surface 14 is greater than the inner diameter of the first through channel 11, so that the "tip" position formed by the inclined surface 14 and the notch 13 is lower than the "partition" between the first through channel 11 and the second through channel 12 in the radial height, which facilitates the bending activity of instruments such as a bendable grasper. While tissue separation is possible when the radial height of the ramp 14 is greater than 1/2 of the radial height of the tip cap 1, such acute angles may be detrimental to instrument access and operation, and may also affect the field of view.

In one embodiment, the bendable section 21 has a plurality of breaks 211. In this embodiment, the multi-slit structure can enhance the flexibility of the bendable section 21, so that the bendable section is easier to bend and has better follow-up property.

In one embodiment, the break 211 extends through the wall of the tube. In this embodiment, the amount of deformation of the through notch is large, and during the bending process, the through notch 211 is less resistant to the non-through state, i.e., is easier to bend, and has better follow-up property.

In one embodiment, the inner wall of the gap 211 is provided with a soft membrane. In this embodiment, when the pulling forceps B moves in the lumen of the sheath tube 2, the pulling forceps B may extend outside the slit 211 in the penetrating state, that is, may deviate outside the lumen of the sheath tube 2, and may fail to pass through. In order to ensure that the traction forceps B always move in the inner cavity of the sheath tube 2, the inner wall of each notch 211 is provided with a soft membrane to cover the through hole, and at the moment, the soft membrane substantially plays a role in guiding, so that the traction forceps B can be effectively ensured to smoothly pass through the inner cavity of the sheath tube 2. The soft film covers the gap in the tube body, and the gap at the outer side still exists. It is easier to process in the through state, but the instrument throughput is poor. At the moment, the inner side of the tube wall is provided with the soft membrane, which is equivalent to a whole complete tube, the guiding property is better, the passing property of the instrument is optimized, and the bending property is better compared with the non-through state. The non-through pipe wall is a whole, so that the material is harder relative to the soft membrane, the pulling force on the notch during bending is stronger, and the bending performance is inferior to that of the soft membrane.

In one embodiment, a plurality of the gaps 211 extend along the axial direction and are arranged in the following manner in the radial direction: on the same radial section, a plurality of gaps 211 distributed at intervals along the circumference are arranged; or, on the same radial cross section, there is only one opening 211 not fully distributed on the circumference; or, on the same radial cross section, there is only one opening 211 which is full of circumference; in the first two radial arrangement modes, the positions of the gaps 211 on the adjacent radial cross sections are consistent or staggered. In this embodiment, the first radial arrangement mode is to arrange a plurality of notches 211 on the same circumference at the same or different angles, so that the radial arrangement mode can be easily bent towards multiple directions, i.e. the radial arrangement mode has multi-directional or omnidirectional following performance; in the second radial arrangement mode, only one notch 211 is arranged on the same circumference, and the notch 211 can be arranged only in the direction needing to be bent, so that the notch 211 can be easily bent in the direction in which the notch 211 is arranged, and the notch 211 can also be easily bent in the opposite direction; the third radial arrangement mode is equivalent to that on the basis of the first mode, a plurality of gaps 211 which are arranged at intervals are connected into a continuous gap, so that the omnidirectional follow-up performance is better.

In one embodiment, the bendable section 21 is a single wall corrugated tube; the outer wall of the single-wall corrugated pipe is as follows: sequentially progressive annular structures; alternatively, a single helix structure; or, a plurality of helices. In this embodiment, the single-wall corrugated pipe is equivalent to a continuous notch arranged on the outer wall thereof, and has better following performance.

In one embodiment, the tip cap 1 is molded from a silicone rubber or a thermoplastic polyurethane elastomer. In this embodiment, the material of the distal end cap 1 may be a soft polymer material with certain elasticity, such as silicone rubber, thermoplastic polyurethane elastomer, etc., which can be stretched within a certain range, and can be matched with endoscopic lenses of different specifications, and meanwhile, the soft material can ensure that the tissue in the body of the patient is not damaged.

In one embodiment, the sheath 2 is formed of one of nylon, high density polyethylene, and metal subjected to an insulation treatment. In this embodiment, the bendable part 21 may be formed of a different material, and the material may be selected according to the range of the bending angle required to improve the adaptability. Generally, flexible materials such as nylon and high density polyethylene are more flexible and have a larger bending angle than rigid materials such as metal.

In one embodiment, as shown in fig. 1-2 and 4-6, the following process may be specifically performed:

s1, the lens of the endoscope A is sleeved in a second through channel 12 arranged on the end cap 1 until the lens of the endoscope A is blocked by a step 121.

S2, the catheter with the tip cap and the endoscope A are sent to an affected part in the body of the patient together, and therefore the establishment of an additional instrument channel is completed.

S3, when the lens of the endoscope A deflects, the tip cap 1 moves along with the endoscope A to drive the notch 211 on the bendable section 21 to deform, and the direction of the bendable section 21 changes along with the endoscope A until the lens of the endoscope A finds a target tissue.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (13)

1. An endoscope front end cap conduit is characterized by comprising a front end cap, a sheath tube and a connector which are sequentially connected, wherein the connector is used for providing an opening for an external auxiliary surgical instrument to enter the sheath tube; the front end cap is internally provided with at least two through channels which are arranged in parallel, and the through channels comprise a first through channel used for connecting the sheath tube and a second through channel used for installing the endoscope, so that the sheath tube and the endoscope are arranged in parallel; the distal end of the sheath has a bendable section, the length of which completely covers the bendable portion of the endoscope.

2. The endoscope tip cap guide of claim 1, wherein the second through channel has an inwardly projecting step therein for blocking a lens of an endoscope.

3. The endoscope tip cap guide of claim 2 wherein a barrier is provided between a segment of the starting end of the first through channel and a segment of the starting end of the second through channel to form a barrier segment, and a segment of the end of the first through channel and a segment of the end of the second through channel are connected by a gap to form a gap segment, the barrier segment being adjacent to the gap segment.

4. The endoscope tip cap guide of claim 3 wherein the length of the notched section is greater than the distance between the step and the distal end face of the tip cap.

5. The endoscopic tip cap catheter according to claim 1, wherein said tip cap is beveled at a distal end of said first through channel.

6. The endoscopic tip cap conduit according to claim 5, wherein a radial height of said ramp is greater than an inner diameter of said first through passage and does not exceed 1/2 of a height of said tip cap.

7. The endoscope tip cap catheter of claim 1, wherein the bendable section has a plurality of slits therein.

8. The endoscope tip cap guide of claim 7 wherein the break-in extends through the wall of the tube.

9. The endoscope first end cap guide of claim 8, wherein the inner wall of the gap is provided with a soft membrane.

10. The endoscope tip cap guide of any one of claims 7-9, wherein a plurality of said slits extend in an axial direction and are arranged in a radial direction in the following manner: on the same radial section, a plurality of gaps are arranged at intervals along the circumference; or, on the same radial cross section, only one opening which is not fully distributed on the circumference is arranged; or, on the same radial section, only one opening is distributed on the circumference; in the former two radial arrangement modes, the positions of the gaps on the adjacent radial cross sections are consistent or staggered.

11. The endoscopic tip cap guide according to claim 1, wherein said bendable section is a single wall bellows; the outer wall of the single-wall corrugated pipe is as follows: sequentially progressive annular structures; alternatively, a single helix structure; or, a plurality of helices.

12. The endoscopic tip cap catheter according to claim 1, wherein said tip cap is molded from silicone rubber or thermoplastic polyurethane elastomer.

13. The endoscope tip cap catheter of claim 1, wherein the sheath is formed of one of nylon, high density polyethylene and metal treated with insulation.

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