CN214857179U - Disposable minimally invasive double-channel reducing expansion sheath and kit thereof - Google Patents

Abstract

The utility model discloses a disposable binary channels reducing expansion sheath that creates a little relates to percutaneous nephroscope puncture passageway sheath technical field, establish the sheath shell of internal sheath portion outside including the internal sheath body and cover, vacuole formation between the internal sheath body and the sheath shell, its characterized in that, internal sheath body and sheath shell middle section are the reducing section, the back end diameter of the internal sheath body and sheath shell all is greater than the anterior segment diameter, the intercommunication is provided with water swivel on the back end of sheath shell, the rear end intercommunication of the internal sheath body is provided with water swivel. The utility model discloses can realize the microchannel percutaneous nephroscope operation, can guarantee that the renal pelvis low pressure lasts the hydrologic cycle again under the prerequisite of binary channels eddy current formula income play water, guarantee nephroscope and inner sheath internal diameter clearance's maximize simultaneously, can short distance remove the nephroscope when smashing the calculus can the suction out calculus of negative pressure.

Description

Disposable minimally invasive double-channel reducing expansion sheath and kit thereof

Technical Field

The utility model belongs to the technical field of percutaneous nephroscope puncture passageway sheath, concretely relates to disposable binary channels reducing expansion sheath that wicresoft.

Background

The percutaneous nephroscope operation is developed more and more widely along with improvement and perfection of X-ray, B-ultrasonic and CT positioning puncture positioning technologies, improvement of lithotripsy equipment, higher and higher puncture precision and fewer operation complications. The development of the minimally invasive vascular interventional operation provides safety guarantee for the percutaneous nephroscope, and most renal calculus operations solve the problems through the percutaneous nephroscope operation. The proportion of open surgery is also less and less. The application range of the ultra-fine channel and microchannel percutaneous nephroscope operation is overlapped with a soft ureteroscope to a certain extent, the soft ureteroscope is used along with the development of laser energy equipment, the application of a soft ureteroscope sheath and the application of 200 um laser optical fibers are continuously expanded, the application range can be used for the upper segment calculus of a ureter with the length of <2cm, and the disposable product of the soft ureteroscope also has been applied, but the water outlet of the larger calculus soft ureteroscope operation is not continuous, the water outlet is a gap between the soft ureteroscope and a soft ureteroscope conveying sheath, if the soft ureteroscope conveying sheath is not placed in place, the renal pelvis high pressure is easily formed, the probability of postoperative sepsis is increased, certain probability residue is generated after postoperative crushing, even though the application of a postoperative concussion calculus removing machine can reduce postoperative calculus residue, but is more troublesome and increases medical cost for a patient, the improved ureteroscope conveying sheath with suction forms a certain form of double channels, however, because of the process, the diameter of the sheath is 14/16Fr, and only a small single channel is needed, the effects of removing and sucking stones during the real operation are poor, and because a channel is added, the external diameter is 16Fr, most of the operation patients using the ureter soft lens delivery sheath need to pre-place a ureter stent for 15 days to 30 days, and then secondary ureter soft lens operation is performed after the ureter stent is expanded. The original intention of the minimally invasive surgery is lost. The future trend is that the medical insurance gap is larger and larger, the control cost of the operation is stricter and stricter, the price of the soft mirror is higher, the mirror is easy to damage, and the price of the disposable soft mirror is higher. Calculus residue with certain probability after operation is limited more and more under the existing Chinese medical insurance system, the percutaneous nephroscope operation has high calculus removal rate, and the development of micro-channel and ultramicro-channel percutaneous nephroscopes ensures that nephroscope mirrors are thinner and thinner, and the development of vascular minimally invasive interventional operations provides guarantee for the percutaneous nephroscope.

According to the size of a kidney channel, 20-22Fr is a standard channel, 16-18Fr is a small channel, 11-14Fr is a micro channel, and 8-10Fr is an ultramicro percutaneous kidney channel. The size of the percutaneous nephroscope operation wound is measured by the size of a kidney channel to be a standard channel, a small channel, a micro channel or an ultramicro channel, on the basis of the skilled mastering of percutaneous nephroscope puncture and other technologies, the size of the channel is in direct proportion to the proportion of bleeding after percutaneous nephroscope operation, the smaller the channel is, the smaller the renal parenchyma injury is, the smaller the probability of bleeding after the operation is, the size of the channel is directly related to the calculus removal speed and the pressure in a renal pelvis, and researches show that the pressure in the renal pelvis is more than or equal to 20mmHg and is directly related to postoperative fever, so the duration of the renal pelvis high pressure is as important as the operation time, but most of the percutaneous kidney channels of all various channels have the same diameter, which means that the size of the renal channels is the same as that of skin and subcutaneous fascia. And the percutaneous nephrolithotomy dilating sheath with the standard channel and the small channel is a single channel, the water inlet is an instrument operation channel of a thicker nephroscope, so the scope body of the nephroscope is thicker, the water outlet is a gap between the nephroscope and the operation dilating sheath, the gap is smaller, an operator usually utilizes the pulse water flow back and forth pressure of a conduit of a retrograde ureteral cannula and a perfusion pump to wash crushed stones out through a certain pressure in the renal pelvis, the larger stones need to be pulled out of the nephroscope from a guide sheath to bring the stones out, so the operation is not convenient, so the stable water circulation under the condition of ensuring the renal pelvis cannot be realized, the 10-14 ultramicro channel percutaneous nephrolithotomy has a thinner F8 and an instrument operation channel of 3.3-3.6Fr, if the laser optical fiber of 550 mu is passed through, the water is difficult to enter from the operation channel, so a unique double-layer metal dilating sheath is adopted, the crushed stones are washed out when the middle sheath and the endoscope body discharge water in a vortex mode, but the larger stones cannot be discharged due to the fact that a gap between the middle sheath and the endoscope body is small, the stones must be foamed, or after the F8 mirror is retracted to a drainage hole behind the chicken wing-shaped Y-shaped single-layer sheath of the thicker connector, the larger stones are discharged through the inner sheath and negative pressure connected with the chicken wing-shaped Y-shaped single-layer sheath connected with the inner sheath, and the nephroscope is retracted from the kidney to the outside of a suction hole of the chicken wing-shaped Y-shaped single-layer sheath of the thicker connector, so that inconvenience is brought to an operation. Moreover, because the maximum outer diameter of the expansion sheath is 14Fr and the inner diameter of the expansion sheath is about 11Fr, the process requirement is extremely high, the price is also very high, and many units are not equipped with the ultramicro-channel percutaneous kidney.

Therefore, the urgent need of utility model one kind can realize the microchannel percutaneous nephroscope operation, again can the binary channels eddy current formula go into under the prerequisite of going out water, guarantee the renal pelvis low pressure and last hydrologic cycle, guarantee the maximize in nephroscope and inner sheath internal diameter clearance simultaneously, can remove the nephroscope by the short distance when smashing the calculus and can the negative pressure attract out the calculus, the hardness of sheath is suitable simultaneously, the product of the unchangeable passageway for the operation is more simple and convenient, safety, to patient, clinical operation doctor and medical insurance aspect level three sides all useful.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a disposable binary channels reducing expansion sheath that creates a little can realize microchannel percutaneous nephroscope operation, can guarantee renal pelvis low pressure and last hydrologic cycle again under the binary channels eddy current formula goes into the prerequisite of water, guarantees nephroscope and inner sheath internal diameter clearance's maximize simultaneously, can remove the nephroscope by the short distance when smashing the calculus and can the vacuum aspiration go out the calculus, and the hardness of sheath is suitable simultaneously, and the passageway is indeformable to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides a disposable binary channels reducing expansion sheath that wicresoft that creates a little, establish the sheath shell outside the internal portion of sheath including internal sheath body and cover, vacuole formation between internal sheath body and the sheath shell, internal sheath body and sheath shell middle section are the reducing section, the back end diameter of internal sheath body and sheath shell all is greater than the anterior segment diameter, the intercommunication is provided with into water swivel on the back end of sheath shell, the rear end intercommunication of internal sheath body is provided with out the water swivel.

As a further aspect of the present invention: the front end and the rear end of the outer sheath shell are hermetically connected with the outer part of the inner sheath body, and an overflow channel is formed in the outer surface of the front end of the outer sheath shell.

As a further aspect of the present invention: the overflow channel is a plurality of overflow holes which are uniformly distributed.

As a further aspect of the present invention: the front end of the outer sheath shell forms a conical surface or an arc surface.

As a further aspect of the present invention: the end part of the water outlet joint is a negative pressure suction port for sucking out liquid or gravels.

As a further aspect of the present invention: one side of the pipe wall of the water outlet joint is provided with a negative pressure suction hole which can be manually controlled.

As a further aspect of the present invention: the outer diameter of the front section of the expansion sheath is 5-24Fr, and the outer diameter of the rear section of the expansion sheath is 10-36 Fr.

As a further aspect of the present invention: and a sealing cap is arranged at the tail end of the expansion sheath.

The utility model also provides a technical scheme: disposable wicresoft binary channels reducing expansion sheath external member, include the expansion sheath still includes a plurality of expansion inner core, the expansion inner core can nestedly run through in the expansion sheath, the expansion inner core front end is pointed end, the length of pointed end is according to the expansion inner core diameter size of different specifications grow in proper order and corresponding shorten, expansion inner core end-to-end connection has the plastic fitting, the through-hole that holds the seal wire and pass is seted up along the axial to the expansion inner core.

As a further aspect of the present invention: the middle section of the expansion inner core is a micro-reducing section which is matched with the reducing section of the inner sheath body.

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

1. the utility model discloses a disposable binary channels reducing expansion sheath that creates a little adopts double-deck design, and so-called double-deck is the pipe box tubular design, and the centre chamber is main entrance (surgical instruments and return water passageway), and the annular chamber of the annular gap that outer tube and inner tube formed is annular channel (inhalant canal) to realize cutting apart and circulating of business turn over water.

2. The utility model discloses a disposable binary channels reducing expansion sheath that wicresoft adopts the thin reducing design of the thick end of inside and outside footpath near-end, and the thin design of end is placed in the kidney diolame, the kidney cone, in kidney nipple department passageway and kidney set system, the double-deck expansion sheath of the less detailed part of end (5-24Fr), and the size of minimizing kidney passageway diameter reduces that the damage of kidney parenchyma is little, reduces the probability that the postoperative is bloodred.

3. The utility model discloses a disposable wicresoft binary channels reducing expansion sheath adopts the design of the thick end thin reducing of inside and outside footpath near-end, and the thick portion of near-end (external diameter 10-36Fr) is placed outside exposing the skin, subcutaneous tissue, Gai's manadesma, perirenal fat. As long as the nephroscope is withdrawn to the position with thick near end in a short distance, the gap space between the main channel hole and the nephroscope is instantly enlarged, and large calculi crushed by operation can be simultaneously washed out. Meanwhile, the position of the nephroscope at the position where the thickness of the nephroscope changes can indirectly adjust the pressure in the renal pelvis.

4. The utility model discloses a disposable binary channels reducing expansion sheath that creates a little, the design of binary channels reducing percutaneous kidney expansion sheath, the flush fluid is the vortex formula and flows in from the terminal overflow hole that fuses of pipe box pipe, it flows to be the vortex formula from the clearance between surgical instruments and the main entrance, Y type water connectors both can connect the negative pressure drainage, the negative pressure that passageway Y type goes out on the water connectors simultaneously attracts the hole can manual negative pressure drainage size, the nephroscope is moved back to the change in short distance and smoothly goes out water when the thick department sheath of department, guarantee the renal pelvis low pressure when lasting hydrologic cycle, wash out kibbling calculus simultaneously, the very big doctor's that makes things convenient for operation. The operation time is reduced, and the renal pelvis high pressure time can be reduced at the same time.

5. The utility model discloses a disposable binary channels reducing expansion sheath of wicresoft, the double-deck expansion sheath of thick reducing in thick reducing before the disposable thin back has solved the problem that the binary channels percutaneous kidney expansion sheath of current metal material is expensive and reuse leads to secondary infection's problem.

Drawings

Fig. 1 is a schematic structural view of the disposable minimally invasive dual-channel reducing expansion sheath of the present invention.

Fig. 2 is a water inlet and outlet flow diagram of the disposable minimally invasive dual-channel reducing expansion sheath of the utility model.

Fig. 3 is a schematic structural view of the expansion inner core in the disposable minimally invasive dual-channel reducing expansion sheath kit of the present invention.

Fig. 4 is a schematic structural view of another embodiment of the expanding inner core in the disposable minimally invasive dual-channel reducing expanding sheath kit of the present invention.

The labels in the figure are: 1. an inner sheath body; 2. an outer sheath shell; 3. a cavity; 4. a diameter-changing section; 5. a water inlet joint; 6. a water outlet joint; 7. a negative pressure suction port; 8. a negative pressure suction hole; 9. a central lumen; 10. a sealing cap; 11. expanding the inner core; 12. plastic fitting of the joint; 13. a micro-reducer section.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, the utility model provides a disposable minimal access binary channels reducing expansion sheath, the expansion sheath is the double-deck expansion sheath of middle section reducing.

The expansion sheath includes that interior sheath body 1 and cover establish including sheath body 1 outside sheath shell 2, vacuole formation 3 between interior sheath body 1 and the sheath shell 2, interior sheath body 1 and sheath shell 2 middle section are reducing section 4, the back end diameter of interior sheath body 1 and sheath shell 2 all is greater than the anterior segment diameter, the intercommunication is provided with into water swivel 5 on the back end of sheath shell 2, the rear end intercommunication of interior sheath body 1 is provided with out water swivel 6.

In this embodiment, the central cavity 9 of the inner sheath 1 is a surgical instrument operation channel and a water return channel, and the end of the expansion sheath is provided with a sealing cap 10. The material of the expansion sheath can adopt disposable antibacterial plastic, the repeated use is not needed, the secondary infection caused by the repeated use of metal materials is avoided, and the use cost is reduced.

In this embodiment, the water inlet joint 5 and the water outlet joint 6 may be joints of various forms adapted to water inlet and outlet pipes, preferably, the water inlet joint 5 is a T-shaped water inlet joint 5, and the water outlet joint 6 is a Y-shaped negative pressure water outlet joint 6.

In this embodiment, the front end and the rear end of the outer sheath casing 2 are hermetically connected to the outside of the inner sheath body 1, and an overflow channel is formed on the outer surface of the front end of the outer sheath casing 2. Preferably, the overflow channel is a plurality of overflow holes which are uniformly arranged.

In some embodiments of the present invention, the front end of the sheath housing 2 forms a conical surface or an arc surface, which is advantageous for insertion into the body to facilitate the operation of advancing and retreating.

In some embodiments of the present invention, the end of the water outlet joint 6 is a negative pressure suction port 7 for sucking out liquid or crushed stone.

In some embodiments of the present invention, a manually controllable negative pressure suction hole 8 is formed on one side of the tube wall of the water outlet joint 6, so that a doctor can control the size of the negative pressure drainage rapidly.

In some embodiments of the present invention, the outer diameter of the front section of the dilating sheath is 5-24Fr and the outer diameter of the rear section of the dilating sheath is 10-36 Fr.

Referring to fig. 1-4, the utility model discloses a disposable binary channels reducing expansion sheath external member that creates a little, include the expansion sheath still includes a plurality of expansion inner core 11, expansion inner core 11 can the scarf joint run through in the expansion sheath, 11 front ends of expansion inner core are the pointed end, the length of pointed end is according to 11 diameter size grow in proper order of the expansion inner core of different specifications and corresponding shortening, 11 end-to-end connections of expansion inner core have moulds the adapter 12, the through-hole that holds the seal wire and pass is seted up along the axial to expansion inner core 11.

In this embodiment, the plastic fitting 12 is a luer fitting, the end of each expansion inner core 11 is provided with a tip, the diameters of the expansion inner cores 11 are different, the lengths of the tips are gradually shortened along with the increase of the diameters of the expansion inner cores 11 with different specifications, and the puncture wound on the internal organ tissue is greatly reduced.

Referring to fig. 3, the gauge of the dilating inner core 11 is a constant diameter of a full length except for a tip portion; referring to fig. 4, in other embodiments, a reducing design may be adopted, such as a micro-reducing section 13 at the middle section of the expanding inner core 11, which is adapted to the reducing section of the inner sheath body 1.

The utility model discloses a theory of operation is:

as shown in fig. 2-4, the utility model discloses a disposable binary channels reducing expansion sheath that creates a little and external member thereof, when the operation was used, use expansion inner core 11 from expanding the human tissue to a little, then wear the cover expansion sheath so that insert the human tissue smoothly in expansion inner core 11 outside, later penetrate medical instrument in the expansion sheath, after waiting to implant to target in place, begin the operation surgical instruments limit and attract harmful substance such as calculus that expand the sheath front end to flow back to the central cavity 9 of the interior sheath body 1 along with the rivers that flow in 5 of income water swivel 5 through negative pressure drainage ware negative pressure in the limit, and discharge in following water swivel 6.

The expansion sheath adopts the design of inner and outer diameters, thick near end and thin tail end, the expansion sheath part with the thin tail end is placed in a kidney capsule, a renal cone, a renal papillary passage and a kidney collecting system, the expansion sheath part with the thin front end part has a double-layer expansion sheath with the diameter of 5-24Fr, and the expansion sheath part with the thick near end part (the outer diameter of 10-30 Fr) is placed outside exposed skin, subcutaneous tissue, Gaster's fascia and perirenal fat. The T-shaped water inlet joint 5 and the Y-shaped negative pressure water outlet joint 6 are positioned outside the skin. The end of the fusion end of the double-layer expansion sheath gap is provided with a plurality of overflow holes of the water inlet channel, flushing fluid flows in from the overflow holes in a vortex mode during percutaneous nephroscope surgery and is discharged from a main channel (a surgical instrument and a water return channel of the main channel gap) formed by a pipe sleeve, and the design of the aperture of the thick end and the thin end of the near end solves the problem that the diameter of the renal channel during percutaneous nephroscope surgery is reduced as much as possible in the background technology, and meanwhile, on the basis of vortex type water inlet, the space between the main channel hole and the nephroscope is instantly enlarged as long as the nephroscope is retreated to the thick part of the near end in a short distance, and large stones crushed by the surgery can be flushed out at the same time. Meanwhile, the size of the pressure in the renal pelvis can be indirectly adjusted at the position where the thickness of the nephroscope changes from the thickness to the diameter, the Y-shaped negative pressure water outlet joint 6 is designed on the double-channel reducing percutaneous nephroscope dilating sheath, the Y-shaped negative pressure water outlet joint 6 can be connected with negative pressure drainage, meanwhile, the negative pressure suction hole 8 in the channel Y-shaped negative pressure water outlet joint 6 can be controlled manually to drain the negative pressure drainage size, vortex type water inlet is realized, smooth water outlet is guaranteed when the nephroscope retreats to the position where the diameter changes from the thickness to the diameter, the renal pelvis low pressure is guaranteed while water circulation is continued, crushed stones are washed out, and great convenience is brought to the operation of doctors. The operation time is reduced, and the renal pelvis high pressure time can be reduced at the same time.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims (10)

1. The disposable minimally invasive dual-channel reducing expansion sheath is characterized in that the middle sections of the inner sheath body and the outer sheath shell are both diameter-variable sections, the rear section diameters of the inner sheath body and the outer sheath shell are larger than the front section diameters, the rear section of the outer sheath shell is communicated with a water inlet joint, and the rear end of the inner sheath body is communicated with a water outlet joint.

2. The disposable minimally invasive dual-channel reducing dilating sheath as claimed in claim 1, wherein the front and rear ends of the outer sheath are hermetically connected with the outside of the inner sheath, and an overflow channel is provided on the outer surface of the front end of the outer sheath.

3. The disposable minimally invasive dual channel variable diameter dilating sheath of claim 2, wherein the overflow channel is a plurality of overflow holes arranged uniformly.

4. The disposable minimally invasive dual-channel variable diameter dilating sheath of claim 1, wherein the front end of the outer sheath shell forms a conical surface or an arc surface.

5. The disposable minimally invasive dual-channel reducing dilating sheath as claimed in claim 1, wherein the end of the water outlet joint is a negative pressure suction port for sucking out liquid or crushed stone.

6. The disposable minimally invasive dual-channel reducing dilating sheath as claimed in claim 5, wherein a manually controllable negative pressure suction hole is formed on one side of the wall of the water outlet joint.

7. The disposable minimally invasive dual-channel variable diameter dilating sheath as claimed in claim 1, wherein the outer diameter of the front section of the dilating sheath is 5-24Fr, and the outer diameter of the rear section of the dilating sheath is 10-36 Fr.

8. The disposable minimally invasive dual channel variable diameter dilating sheath of claim 1, wherein a sealing cap is mounted at the end of the dilating sheath.

9. The disposable minimally invasive dual-channel reducing expansion sheath kit is characterized by comprising the expansion sheath as claimed in any one of claims 1 to 8, and further comprising a plurality of expansion inner cores, wherein the expansion inner cores can be nested and penetrate through the expansion sheath, the front ends of the expansion inner cores are pointed ends, the lengths of the pointed ends are sequentially increased and correspondingly shortened according to the diameter sizes of the expansion inner cores of different specifications, the tail ends of the expansion inner cores are connected with plastic fittings, and the expansion inner cores are axially provided with through holes for accommodating guide wires to pass through.

10. The disposable minimally invasive dual channel variable diameter dilating sheath of claim 9, wherein the dilating inner core middle section is a micro-tapered section adapted to the inner sheath body tapered section.

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