A combined sheath for percutaneous renal perfusion suction and tearing

Abstract

The present invention belongs to the field of medical devices, and specifically relates to a percutaneous renal perfusion suction tearable combined sheath, including a perfusion sheath assembly and a suction sheath assembly, the perfusion sheath assembly including a perfusion main pipe, an outer sheath and a perfusion branch, the suction sheath assembly including a suction main pipe, an inner sheath plugged with the suction main pipe, and a suction branch arranged on the side of the suction main pipe, the rear end of the perfusion main pipe is connected to the front end of the suction main pipe by a connecting assembly, the inner sheath is located inside the outer sheath, the inner sheath has an inner channel connected to the suction branch, and an outer channel connected to the perfusion branch is formed between the inner sheath and the outer sheath. The structure of the present invention is suitable for injection molding production, has lower cost, can be used once, and is more hygienic; the connecting assembly in the present invention enables the perfusion sheath and the suction sheath to be quickly disassembled and assembled, and can ensure sealing; the locking sealing sleeve in the present invention can realize the rapid disassembly and assembly of the perfusion main pipe and the outer sheath, and can also ensure sealing.

Description

Technical Field

[0001] The invention belongs to the field of medical devices, and in particular relates to a percutaneous renal perfusion suction tearable combined sheath. Background Art

[0002] Minimally invasive percutaneous nephrolithotomy, commonly known as "hole drilling and stone removal", involves making an incision of about 0.5 cm in the patient's waist, establishing a stone removal channel, inserting a nephroscope, and using an ultrasonic pneumatic lithotripsy or holmium laser lithotripsy to break up kidney stones, especially cast stones and upper ureteral stones, and then remove the stones. Percutaneous nephrolithotomy is an important part of urological surgery. In the treatment of upper kidney stones and upper ureteral stones, it has become a major modern treatment method together with ureteroscopy and extracorporeal shock wave lithotripsy, and has completely changed the traditional open surgical treatment methods.

[0003] Minimally invasive percutaneous nephrolithotomy can be achieved with a percutaneous nephrolithotomy stone removal system. Currently, stone removal systems on the market generally use the principle of independent perfusion and independent suction. The disadvantage of this method is that the intrarenal pressure is unstable and it is easy to cause intrarenal high pressure. Later, someone proposed a stone removal system such as Expas and SMP. This stone removal system uses water inflow between the double sheaths and water outflow between the inner sheath and the mirror body to remove stones. The intelligent host adjusts the water inflow and outflow to make the flow rate and speed consistent, ensuring that the renal pelvis pressure is in a balanced state, effectively reducing the pressure of the renal collecting system, reducing surgical risks, and maintaining a clear field of vision during surgery, making the surgery faster, simpler, and safer.

[0004] The lithotripsy systems such as Expedia and SMP include B-ultrasound probe positioner, zebra guidewire, dilator, suction lithotripsy sheath, suction valve body, percutaneous nephroscope, host control system and other components. The suction lithotripsy sheath includes outer sheath, inner sheath and outer sheath obturator. Among them, the suction valve body and the suction lithotripsy sheath are made of metal. The metal suction lithotripsy sheath and suction valve body are expensive and bulky, which can easily cause damage to the surrounding tissues of the kidney. They are repeatedly used between different patients and cannot fully guarantee hygiene and safety.

[0005] Based on the above problems, the applicant conceived a percutaneous renal perfusion suction tear-away combined sheath made of plastic to replace the suction stone-clearing sheath and the suction valve body. The plastic percutaneous renal perfusion suction tear-away combined sheath can be directly injection molded, is inexpensive, can be used once, and can ensure hygiene and safety. Since the processing technology and material properties of plastics are different from those of metals, the structure of the original metal suction stone-clearing sheath and the suction valve body cannot be completely transferred to the percutaneous renal perfusion suction tear-away combined sheath made of plastic. Therefore, the structure of the plastic percutaneous renal perfusion suction tear-away combined sheath needs to be redesigned. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, the present invention provides a technical solution for percutaneous renal perfusion aspiration tearing combined sheath.

[0007] The percutaneous renal perfusion suction tearable combined sheath is characterized in that it includes a perfusion sheath assembly and a suction sheath assembly. The perfusion sheath assembly includes a perfusion main pipe, an outer sheath plug-matched with the perfusion main pipe, and a perfusion branch pipe arranged on the side of the perfusion main pipe. The suction sheath assembly includes a suction main pipe, an inner sheath plug-matched with the suction main pipe, and a suction branch pipe arranged on the side of the suction main pipe. The rear end of the perfusion main pipe is connected to the front end of the suction main pipe by a connecting assembly. The inner sheath is located inside the outer sheath. The inner sheath has an inner channel connected to the suction branch pipe. An outer channel connected to the perfusion branch pipe is formed between the inner sheath and the outer sheath.

[0008] The percutaneous renal perfusion suction tearable combined sheath is characterized in that the connecting component includes an inner sleeve sleeved on the front end of the suction main pipe and an outer sleeve sleeved on the rear end of the perfusion main pipe, the front end of the suction main pipe is inserted into the rear end of the perfusion main pipe, the rear end of the perfusion main pipe is clamped between the inner sleeve and the outer sleeve, and the inner sleeve is clamped with the rear end of the outer sleeve.

[0009] The percutaneous renal perfusion suction tearable combined sheath is characterized in that an outer sleeve inner ring is arranged on the inner side of the rear end of the outer sleeve, the rear end of the perfusion main pipe is clamped between the outer sleeve and the outer sleeve inner ring, a first inner sleeve outer protrusion is arranged on the front end outer wall of the inner sleeve, a second inner sleeve outer protrusion is arranged on the rear end outer wall of the inner sleeve, the outer sleeve inner ring is sleeved on the outside of the inner sleeve, and is clamped between the first inner sleeve outer protrusion and the second inner sleeve outer protrusion.

[0010] The percutaneous renal perfusion suction tearable combined sheath is characterized in that the rear end of the perfusion main pipe through hole is a stepped hole structure, a sealing ring is arranged between the hole wall of the stepped hole structure and the outer wall of the front end of the suction main pipe, and the front end of the inner sleeve is against the sealing ring.

[0011] The percutaneous renal perfusion suction tearable combined sheath is characterized in that a perfusion main pipe protrusion is arranged on the outer wall at the rear end of the perfusion main pipe, a jacket protrusion is arranged around the front end of the inner wall of the jacket, and the perfusion main pipe protrusion is clamped with the jacket protrusion.

[0012] The front end tube wall of the inner sleeve is provided with a plurality of cracks so that the front end tube wall of the inner sleeve forms a circle of blades spaced from each other, and the first inner sleeve outer protrusion is provided on the outer wall of the blade.

[0013] The percutaneous renal perfusion suction tearable combined sheath is characterized in that an air pressure valve is arranged on the suction main pipe.

[0014] The percutaneous renal perfusion suction tearable combined sheath is characterized in that the air pressure valve is a duckbill valve.

[0015] The percutaneous renal perfusion suction tearable combined sheath is characterized in that the outer sheath is a tearable sheath.

[0016] The percutaneous renal perfusion suction tearable combined sheath is characterized in that the outer sheath is connected to the perfusion main pipe through a locking sealing sleeve, the front end of the locking sealing sleeve is interference-fitted to the rear end of the perfusion main pipe, and the rear end of the locking sealing sleeve is interference-fitted to the rear end of the outer sheath.

[0017] The percutaneous renal perfusion suction tearable combined sheath is characterized in that the rear end of the inner sheath is fixedly connected to the front end of the suction main pipe; and a sealing cover is arranged at the rear end of the suction main pipe.

[0018] Compared with the prior art, the structure of the present invention is suitable for injection molding production, has lower cost, can be used once, and is more hygienic; at the same time, the connecting assembly in the present invention enables the irrigation sheath and the suction sheath to be quickly disassembled and assembled, and can ensure sealing; the locking sealing sleeve in the present invention can realize the rapid disassembly and assembly of the irrigation main pipe and the outer sheath, and can also ensure sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is one of the external structure schematic diagrams of the present invention;

[0020] Figure 2 This is the second schematic diagram of the external structure of the present invention;

[0021] Figure 3 for Figure 2 AA section view;

[0022] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0023] Figure 5 for Figure 3 Enlarged view of point C in the middle;

[0024] Figure 6 It is a schematic diagram of the inner sleeve structure in the present invention;

[0025] Figure 7 It is a schematic diagram of the outer jacket structure in the present invention;

[0026] Figure 8 It is a schematic diagram of the valve core structure of the duckbill valve in the present invention.

[0027] In the figure: perfusion main pipe 1, perfusion main pipe protrusion 101, perfusion main pipe shoulder 102, outer sheath 2, outer channel 201, perfusion branch pipe 3, suction main pipe 4, inner sheath 5, inner channel 501, suction branch pipe 6, connecting assembly 7, inner sleeve 701, first inner sleeve outer protrusion 7011, second inner sleeve outer protrusion 7012, blade 7013, inner sleeve inner protrusion 7014, outer sleeve 702, outer sleeve inner ring 7021, outer sleeve protrusion 7022, sealing ring 8, air pressure valve 9, locking sealing sleeve 10, sealing cover 11. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] like Figure 1-8 As shown, a percutaneous renal perfusion suction tearable combined sheath includes a perfusion sheath assembly and a suction sheath assembly, the perfusion sheath assembly includes a perfusion main tube 1, an outer sheath 2 plugged into the perfusion main tube 1, and a perfusion branch tube 3 arranged on the side of the perfusion main tube 1, the suction sheath assembly includes a suction main tube 4, an inner sheath 5 plugged into the suction main tube 4 by interference fit, and a suction branch tube 6 arranged on the side of the suction main tube 4, the rear end of the perfusion main tube 1 is connected to the front end of the suction main tube 4 by a connecting assembly 7, the inner sheath 5 is located in the outer sheath 2, the inner sheath 5 has an inner channel 501 connected to the suction branch tube 4, and an outer channel 201 connected to the perfusion branch tube 3 is formed between the inner sheath 5 and the outer sheath 2.

[0030] The specific structure of the connecting assembly: the connecting assembly 7 includes an inner sleeve 701 sleeved on the front end of the suction main pipe 4 and an outer sleeve 702 sleeved on the rear end of the perfusion main pipe 3, an inner sleeve inner ring 7021 is provided on the inner side of the rear end of the outer sleeve 702, and an outer sleeve protrusion 7022 is provided on the front end of the inner wall of the outer sleeve 702, and the outer sleeve protrusion 7022 is a convex ring structure, and an outer sleeve protrusion 101 is provided on the outer wall of the rear end of the perfusion main pipe 1, and the perfusion main pipe protrusion 101 is engaged with the outer sleeve protrusion 7022, so that the rear end of the perfusion main pipe 1 is engaged with the outer sleeve 70 2 and the outer sleeve inner ring 7021, the front end tube wall of the inner sleeve 701 is provided with a plurality of cracks, so that the front end tube wall of the inner sleeve 701 forms a circle of blades 7013 spaced from each other, each blade 7013 is provided with a first inner sleeve outer protrusion 7011, and the rear end outer wall of the inner sleeve 701 is provided with a second inner sleeve outer protrusion 7012, the second inner sleeve outer protrusion 7012 is a convex ring structure, the outer sleeve inner ring 7021 is sleeved on the outside of the inner sleeve 701, and is clamped between the first inner sleeve outer protrusion 7011 and the second inner sleeve outer protrusion 7012. The rear end of the perfusion main pipe 1 is outwardly expanded, and the rear end of the through hole of the perfusion main pipe 1 is a stepped hole structure, and a sealing ring 8 is provided between the hole wall of the stepped hole structure and the outer wall of the front end of the suction main pipe 4, and the front end of the inner sleeve 701 abuts against the sealing ring 8, so that the sealing performance of the present invention is better. In addition, the rear end inner wall of the perfusion main pipe 3 is clamped with the inner ring 7021 of the outer sleeve through a protrusion structure, and a group of inner sleeve inner protrusions 7014 are arranged on the inner wall of the inner sleeve 701. When the suction main pipe 4 is inserted into the inner sleeve 701, the inner sleeve inner protrusions 7014 can achieve an interference fit between the suction main pipe 4 and the inner sleeve 701, so that the suction main pipe 4 and the inner sleeve 701 can be easily assembled and disassembled.

[0031] As a further optimization of the injection pipe, a pipe stop shoulder 102 is provided on the outer wall at the rear end of the injection pipe 1, the pipe stop shoulder 102 is located at the front end of the injection pipe protrusion 101, and the front end of the outer sleeve 702 abuts against the pipe stop shoulder 102. The above structure is convenient for limiting and connecting.

[0032] As a further optimization of the suction main pipe, a pressure valve 9 is provided on the suction main pipe 4. The pressure valve 9 is preferably a duckbill valve. The duckbill valve includes an external valve body and an internal valve core. The duckbill valve is a well-known structure, which has a gradually shrinking and tightened exhaust hole, which can only exhaust air but not intake air. The duckbill valve is used to relieve pressure and make the surgical process smoother.

[0033] As a further optimization of the suction main pipe, a sealing cover 11 is provided at the rear end of the suction main pipe 4, and the sealing cover 11 has a small hole for the nephroscope to penetrate.

[0034] As a further optimization of the outer sheath, the outer sheath 2 is a tear-away sheath. The tear-away sheath is a well-known technology and has tear-away handles at both ends. The outer sheath 2 is set as a tear-away sheath for the purpose of facilitating the removal of the outer sheath from the human body at the end of the operation.

[0035] As a further optimization of the connection structure between the outer sheath and the perfusion main pipe: the outer sheath 2 is connected to the perfusion main pipe 1 through a locking seal sleeve 10, the front end of the locking seal sleeve 10 is interference-fitted to the rear end of the perfusion main pipe 1, and the rear end of the locking seal sleeve 10 is interference-fitted to the rear end of the outer sheath 2. The locking seal sleeve 10 is connected to the outer sheath 2 and the perfusion main pipe 1 through interference fit, and can be assembled and disassembled, and can play a good sealing effect.

[0036] As a further optimization of the present invention: the injection main pipe 1 and the injection branch pipe 3 are an integral injection molding structure, and the suction main pipe 2 and the suction branch pipe 5 are also an integral injection molding structure.

[0037] It should be particularly noted that all components in the present invention are made of plastic.

[0038] When assembling the connection assembly of the present invention, the outer sleeve 702 is first clamped on the perfusion main pipe 1, and then the inner sleeve 701 is inserted into the hole of the inner ring 7021 of the outer sleeve. The front end blades 7013 of the inner sleeve 701 form a chrysanthemum-like crack structure. When inserted, the front end of the inner sleeve 701 will slightly shrink and gather. After the front end of the inner sleeve 701 passes through the hole of the inner ring 7021 of the outer sleeve, the front end of the inner sleeve 701 will automatically expand, so that the inner sleeve 701 is tightly connected with the outer sleeve 702, and the more it is inserted, the tighter it is, and then the suction main pipe 4 is inserted into the inner sleeve 701. Alternatively, the outer sleeve 702 and the inner sleeve 701 can be assembled first, and then the connection assembly 7 is installed as a whole on the perfusion main pipe 1, and finally the suction main pipe 4 is inserted into the inner sleeve 701.

[0039] When the present invention is used in minimally invasive percutaneous nephrolithotomy: first, a dilating tube is installed on the irrigation sheath assembly and inserted into the human body. After entering the human body, the dilating tube is pulled out from the irrigation sheath. Then, the suction sheath assembly is installed on the irrigation sheath assembly through the connecting assembly 7 to form a combined sheath for use. The irrigation branch tube 3 of the irrigation sheath assembly is connected to a known irrigation water source, and the suction branch tube 6 of the suction sheath assembly is connected to a known irrigation suction source. Then, the endoscope is placed into the surgical site of the human body through the combined sheath, and the stone is removed by holmium laser. At the same time, the irrigation branch 3 supplies water, and the water flows to the surgical site through the outer channel 201. After the stone is broken, the water and the stone are sucked out from the inner channel 501 through the suction branch 6 through the irrigation water absorption source. After the stone is removed, the irrigation tube 1 is pulled out from the outer sheath 2, and the other components of the suction sheath assembly and the irrigation sheath assembly are all removed, leaving only the outer sheath 2 in the surgical part. The drainage tube is inserted into the surgical part through the outer sheath 2, and finally the outer sheath 2 is torn open and removed, leaving only the drainage tube, and the operation is ended.

[0040] In addition to being able to replace the suction stone-clearing sheath and suction valve body in the traditional stone-clearing system for minimally invasive percutaneous nephrolithotomy, the present invention can also be disassembled and used separately. For example, the irrigation sheath and the dilation tube can be used as a minimally invasive dilation drainage kit, and the suction sheath can be used as a ureteral guide sheath. Moreover, the irrigation sheath assembly and the suction sheath assembly of the present invention can provide a variety of sizes and specifications, and the combination can be selected when used. In addition, since the irrigation sheath assembly and the suction sheath assembly in the present invention are similar in structure, the two can be interchanged in front and back, and can still be connected by a connecting assembly. The irrigation sheath assembly is used for negative pressure suction, and the suction sheath assembly is used for irrigation and water supply.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A percutaneous renal perfusion suction tearable combined sheath, characterized in that The invention comprises an irrigation sheath assembly and a suction sheath assembly, wherein the irrigation sheath assembly comprises an irrigation main pipe (1), an outer sheath (2) plug-fitted with the irrigation main pipe (1), and an irrigation branch pipe (3) arranged at the side of the irrigation main pipe (1); the suction sheath assembly comprises a suction main pipe (4), an inner sheath (5) plug-fitted with the suction main pipe (4), and a suction branch pipe (6) arranged at the side of the suction main pipe (4); the rear end of the irrigation main pipe (1) is connected to the front end of the suction main pipe (4) via a connecting assembly (7); the inner sheath (5) is located inside the outer sheath (2); the inner sheath (5) has an inner channel (501) in communication with the suction main pipe (4); an outer channel (201) in communication with the irrigation branch pipe (3) is formed between the inner sheath (5) and the outer sheath (2); The connecting assembly (7) comprises an inner sleeve (701) sleeved on the front end of the suction main pipe (4) and an outer sleeve (702) sleeved on the rear end of the perfusion main pipe (1); the front end of the suction main pipe (4) is inserted into the rear end of the perfusion main pipe (1); the rear end of the perfusion main pipe (1) is clamped between the inner sleeve (701) and the outer sleeve (702); the inner sleeve (701) and the rear end of the outer sleeve (702) are clamped; an outer sleeve inner ring (702) is provided on the inner side of the rear end of the outer sleeve (702). 021), the rear end of the perfusion main pipe (1) is clamped between the outer sleeve (702) and the inner ring (7021) of the outer sleeve, the front end outer wall of the inner sleeve (701) is provided with a first inner sleeve outer protrusion (7011), the rear end outer wall of the inner sleeve (701) is provided with a second inner sleeve outer protrusion (7012), the outer ring (7021) of the outer sleeve is sleeved outside the inner sleeve (701), and is clamped between the first inner sleeve outer protrusion (7011) and the second inner sleeve outer protrusion (7012); The rear end of the inner sheath (5) is fixedly connected to the front end of the suction main pipe (4); and a sealing cover (11) is provided at the rear end of the suction main pipe (4).

2. A percutaneous renal perfusion suction tearable combined sheath according to claim 1, characterized in that The rear end of the through hole of the perfusion main pipe (1) is a stepped hole structure, a sealing ring (8) is arranged between the hole wall of the stepped hole structure and the outer wall of the front end of the suction main pipe (4), and the front end of the inner sleeve (701) abuts against the sealing ring (8).

3. The percutaneous renal perfusion suction tearable combined sheath according to claim 1, characterized in that The outer wall of the rear end of the perfusion main pipe (1) is provided with a perfusion main pipe protrusion (101), and the front end of the inner wall of the outer jacket (702) is provided with an outer jacket protrusion (7022) in a ring shape, and the perfusion main pipe protrusion (101) is snap-connected with the outer jacket protrusion (7022).

4. The percutaneous renal perfusion suction tearable combined sheath according to claim 1, characterized in that The front end tube wall of the inner sleeve (701) is provided with a plurality of cracks so that the front end tube wall of the inner sleeve (701) forms a circle of blades (7013) spaced apart from each other, and the first inner sleeve outer protrusion (7011) is provided on the outer wall of the blade (7013).

5. A percutaneous renal perfusion suction tearable combined sheath according to any one of claims 1 to 4, characterized in that The suction main pipe (4) is provided with an air pressure valve (9), which is a duckbill valve.

6. A percutaneous renal perfusion suction tearable combined sheath according to any one of claims 1 to 4, characterized in that The outer sheath (2) is a tear-away sheath.

7. A percutaneous renal perfusion suction tearable combined sheath according to any one of claims 1 to 4, characterized in that The outer sheath (2) is connected to the perfusion main pipe (1) via a locking sealing sleeve (10); the front end of the locking sealing sleeve (10) is interference-fitted to the rear end of the perfusion main pipe (1), and the rear end of the locking sealing sleeve (10) is interference-fitted to the rear end of the outer sheath (2).

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