Adjustable bent sheath used under endoscope

Abstract

An adjustable bent sheath used under an endoscope belongs to the technical field of medical instruments and comprises a handle, a catheter, a bendable catheter head and a direction adjusting knob, the handle is connected with the direction adjusting knob, the direction adjusting knob is connected with the catheter through a rotating device in the handle, and the catheter is connected with the bendable catheter head. The device is used for supporting and guiding treatment instruments under the digestive endoscopy, the stability and accuracy of conveying the instruments are improved through the device, and the operation time is shortened; the device can be perfectly matched with all endoscopes on the market, meanwhile, the stability and supporting performance of conveying follow-up treatment instruments are improved, the operation time is shortened, and meanwhile the operation success rate of operators in areas with insufficient experience and unskilled operations can be increased.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to an adjustable curved sheath used under an endoscope. Background Art

[0002] Currently in digestive endoscopic treatment, the endoscope is the main device that provides images. All therapeutic medical devices are inserted through the jaws of the endoscope. At the same time, due to the anatomical structure of the human body, the length of the endoscope is more than 1 meter. After the therapeutic medical devices enter through the jaws, they are difficult to control. At the same time, affected by factors such as the patient's breathing, body shape, and the stability of the operator's control of the device, there are often problems with the delivery of devices not being in place and hidden lesions being difficult to locate.

[0003] The following are some of the problems encountered during digestive endoscopic treatment:

[0004] 1. In all surgeries that require endoscopic treatment, the medical devices used for treatment need to enter through the jaws, which makes them difficult to manipulate. In addition, there are problems with the delivery of the devices not being in place, making it difficult to locate hidden lesions.

[0005] 2. If the patient is obese and the lesion cannot be exposed by moving or pushing the patient's abdomen, or if there is respiratory disturbance or the operator's hand is unstable, no device can increase the support and stability of the entry instrument to accurately reach the lesion.

[0006] 3. In addition, endoscopic surgery is difficult to perform. It is difficult for experienced operators to teach young operators the surgical procedure. There is no easy-to-use equipment to pre-position the lesion and allow young operators to deliver the instruments. Therefore, medical students and inexperienced operators face a low surgical success rate. Summary of the invention

[0007] In order to solve the above-mentioned problems, the present invention proposes: an adjustable bending sheath used under endoscopy, comprising a handle, a catheter, a bendable catheter head and a direction adjustment knob, the handle is connected to the direction adjustment knob, the direction adjustment knob is connected to the catheter through a rotating device inside the handle, and the catheter is connected to the bendable catheter head.

[0008] Furthermore, the rotating device includes a rotating nut, a gear driving shaft, a gear driven shaft and a gear, the direction adjustment knob is connected to the rotating nut, the rotating nut is connected to the gear driving shaft and the gear driven shaft, a gear is arranged between the gear driving shaft and the gear driven shaft, the gear driving shaft and the gear driven shaft are connected to the catheter, the rotating device is arranged inside the handle housing, and the direction adjustment knob is threadedly connected to the handle housing through a spring sheet.

[0009] Furthermore, the direction adjustment knob and the rotating nut are axially fixedly connected via a pin.

[0010] Furthermore, a limiting slot is provided on the rotating nut.

[0011] Furthermore, the catheter body of the catheter is provided with an inner layer catheter, a middle layer catheter and an outer layer catheter from inside to outside, and a first side hole channel and a second side hole channel are provided in the inner layer catheter.

[0012] Furthermore, the gear driving shaft is connected to the steel wire through a first baffle, and the steel wire passes through the first side hole channel and is connected to the bendable catheter head through another first baffle;

[0013] The gear driven shaft is connected to the steel wire through a second baffle, and the steel wire is connected to the bendable catheter head through another second baffle after passing through the second side hole channel.

[0014] Furthermore, the bendable catheter head includes a head and an outer hose, the outer hose is connected to the head, the catheter inside the outer hose is connected to the inner catheter and the middle catheter of the catheter, the steel wire passes through the first side hole channel inside the outer hose and is welded to the head through another first baffle, and the steel wire passes through the second side hole channel inside the outer hose and is welded to the head through another second baffle.

[0015] Furthermore, the inner layer conduit and the outer layer conduit are made of polymer materials, and the middle layer conduit is a stainless steel braided mesh tube.

[0016] Furthermore, the head is made of stainless steel.

[0017] The beneficial effects of the present invention are as follows: the device of the present invention is used to support and guide treatment instruments under digestive endoscopy, and the device improves the stability and accuracy of the delivery instruments and reduces the operation time; the device can perfectly adapt to all endoscopes on the market, and at the same time improve the stability and support of the subsequent treatment instruments, shorten the operation time, and at the same time, it can improve the success rate of the operation for operators in areas with insufficient experience and unskilled surgery. The specific advantages are as follows:

[0018] 1. This device can be used in all surgeries that require endoscopic treatment. The disposable endoscopic adjustable curved sheath is delivered into the forceps channel, and then all instruments are passed through the device to the lesion site.

[0019] 2. If the patient is obese and the lesion cannot be exposed by moving or pushing the patient's abdomen, or if there is respiratory interference or the operator's hand is unstable, the use of an adjustable curved sheath can increase the support and stability of the entry instrument and accurately reach the lesion.

[0020] 3. For some young surgeons, the more experienced surgeons can pre-position the adjustable curved sheath to the lesion site, and then let the younger surgeons deliver the instrument. This can improve the success rate of surgery for medical students and inexperienced surgeons. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of the adjustable bending sheath of the present invention;

[0022] Figure 2 The structure of the adjustable bending sheath of the present invention is shown in FIG. Figure 1 ;

[0023] Figure 3 The structure of the adjustable bending sheath of the present invention is shown in FIG. Figure 2 ;

[0024] Figure 4 It is a schematic diagram of the structure of the rotating device of the present invention;

[0025] Figure 5 It is a schematic diagram of the structure of the catheter of the present invention;

[0026] Figure 6 It is a schematic diagram of the side structure of the catheter of the present invention;

[0027] Figure 7 It is a partial structural schematic diagram of the rotating device of the present invention;

[0028] Figure 8 The structure of the bendable catheter head of the present invention is schematically shown. Figure 1 ;

[0029] Fig. 9 The structure of the bendable catheter head of the present invention is schematically shown. Figure 2 .

[0030] 1. handle, 2. catheter, 3. bendable catheter head, 31. head, 32. outer hose, 4. direction adjustment knob, 11. gear driving shaft, 12. gear passive shaft, 13. rotating nut, 14. pin, 15. slot, 16. spring, 17. handle shell, 18. gear, 21. catheter theme, 22. steel wire, 23. first baffle, 24. second baffle, 25. first side hole channel, 26. second side hole channel, 27. middle catheter, 28. inner catheter, 29. outer catheter. DETAILED DESCRIPTION

[0031] In order to make the technical means and objectives of the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments. An adjustable curved sheath used under an endoscope, such as Figure 1As shown, it includes a handle 1, a catheter 2, a bendable catheter head 3 and a direction adjustment knob 4, the handle 1 is connected to the direction adjustment knob 4, the direction adjustment knob 4 is connected to the catheter 2 through a rotating device inside the handle 1, and the catheter 2 is connected to the bendable catheter head 3.

[0032] Among them, Figure 2-Figure 4 As shown, the rotating device includes a rotating nut 13, a gear driving shaft 11, a gear driven shaft 12 and a gear 18, the direction adjustment knob 4 is connected to the rotating nut 13, the rotating nut 13 is connected to the gear driving shaft 11 and the gear driven shaft 12, the gear 18 is arranged between the gear driving shaft 11 and the gear driven shaft 12, the gear driving shaft 11 and the gear driven shaft 12 are connected to the catheter 2, the rotating device is arranged inside the handle housing 17, and the direction adjustment knob 4 is threadedly connected to the handle housing 17 through the spring piece 16.

[0033] The direction adjustment knob 4 is axially fixedly connected to the rotating nut 13 via a pin 14 .

[0034] Wherein, a limiting slot 15 is provided on the rotating nut 13 .

[0035] Among them, Figure 6 As shown, the catheter body 21 of the catheter 2 is provided with an inner layer catheter 28 , a middle layer catheter 27 , and an outer layer catheter 29 from the inside to the outside, and a first side hole channel 25 and a second side hole channel 26 are provided in the inner layer catheter 28 .

[0036] Among them, Figure 7 As shown, the gear driving shaft 11 is connected to the steel wire 22 through a first baffle 23, and the steel wire 22 passes through the first side hole channel 25 and is connected to the bendable catheter head 3 through another first baffle 23;

[0037] The gear driven shaft 12 is connected to the steel wire 22 through a second baffle 24 , and the steel wire 22 passes through the second side hole channel 26 and is connected to the bendable catheter head 3 through another second baffle 24 .

[0038] Among them, Figure 5 , Figure 8-9 As shown, the bendable catheter head 3 includes a head 31 and an outer hose 32, the outer hose 32 is connected to the head 31, the catheter inside the outer hose 32 is connected to the inner catheter 28 and the middle catheter 27 of the catheter 2, the steel wire 22 passes through the first side hole channel 25 inside the outer hose 32 and is welded to the head 31 through another first baffle 23, and the steel wire 22 passes through the second side hole channel 26 inside the outer hose 32 and is welded to the head 31 through another second baffle 24.

[0039] The inner layer conduit 28 and the outer layer conduit 29 are made of polymer materials, and the middle layer conduit 27 is a stainless steel braided mesh tube.

[0040] Wherein, the head 31 is made of stainless steel.

[0041] Functional description: By rotating the direction adjustment knob 4, the direction of the bendable catheter head 3 can be adjusted as follows:

[0042] The direction adjustment knob 4 and the rotating nut 13 are axially fixed by the pin 14, and the radial movement of the direction adjustment knob 4 is limited by the slot 15 structure, so that the direction adjustment knob 4 and the rotating nut 13 can rotate together in linkage.

[0043] The handle spring piece 16 structure can maintain a certain friction between the direction adjustment knob 4 and the handle housing 17, so that the direction adjustment knob 4 will not rebound easily after being rotated to a certain angle.

[0044] There is a threaded fit between the rotating nut 13 and the gear driving shaft 11. When the direction adjustment knob 4 drives the rotating nut 13 to rotate forward and reverse, the rotating nut 13 will drive the gear driving shaft 11 to move forward and backward. The forward and backward movement of the gear driving shaft 11 will drive the gear 18 to rotate, and the axis of the gear 18 will remain unchanged relative to the housing. The gear 18 will drive the gear driven shaft 12 to move forward and backward. In this way, the gear driving shaft 11 and the gear driven shaft 12 can move the same displacement in opposite directions.

[0045] The structure of the catheter Figure 6 As shown, the inner catheter 28 has two side hole channels, a first side hole channel 25 and a second side hole channel 26. The inner catheter 28 is made of polymer material, the middle tube catheter 27 is made of stainless steel braided mesh tube, and the outer catheter 29 is made of polymer material.

[0046] The bendable catheter head 3 also adopts a three-layer structure, the head 31 is connected and fixed to the first baffle 23 and the second baffle 24, and the head 31 is also made of stainless steel. It can be connected to the first baffle 23 and the second baffle 24 by welding, and the middle layer and the inner layer are connected to the entire catheter. Its outer layer tube is a hose. In this way, the mesh tube inside the bendable catheter head 3 can be compressed or stretched by stretching the first baffle 23 and the second baffle 24.

[0047] The first baffle 23 and the second baffle 24 are respectively fixed to the rear ends of the gear driving shaft 11 and the gear driven shaft 12. When the gear driving shaft 11 and the gear driven shaft 12 move relatively, the first baffle 23 and the second baffle 24 can be pulled to realize the function that the bendable catheter head 3 can turn.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An adjustable curved sheath for use under endoscopy, characterized in that: The invention comprises a handle (1), a catheter (2), a bendable catheter head (3) and a direction adjustment knob (4); the handle (1) is connected to the direction adjustment knob (4); the direction adjustment knob (4) is connected to the catheter (2) via a rotating device inside the handle (1); and the catheter (2) is connected to the bendable catheter head (3).

2. The adjustable curved sheath for use under endoscopy as claimed in claim 1, characterized in that: The rotating device comprises a rotating nut (13), a gear driving shaft (11), a gear driven shaft (12) and a gear (18); the direction adjustment knob (4) is connected to the rotating nut (13); the rotating nut (13) is connected to the gear driving shaft (11) and the gear driven shaft (12); a gear (18) is arranged between the gear driving shaft (11) and the gear driven shaft (12); the gear driving shaft (11) and the gear driven shaft (12) are connected to the catheter (2); the rotating device is arranged inside a handle housing (17); and the direction adjustment knob (4) is threadedly connected to the handle housing (17) via a spring sheet (16).

3. The adjustable curved sheath for use under endoscopy as claimed in claim 2, characterized in that: The direction adjustment knob (4) and the rotating nut (13) are axially fixedly connected via a pin (14).

4. The adjustable curved sheath for use under endoscopy as claimed in claim 3, characterized in that: The rotating nut (13) is provided with a position-limiting slot (15).

5. The adjustable curved sheath for use under endoscopy as claimed in claim 4, characterized in that: The catheter body (21) of the catheter (2) is provided with an inner layer catheter (28), a middle layer catheter (27), and an outer layer catheter (29) from the inside to the outside, and a first side hole channel (25) and a second side hole channel (26) are provided in the inner layer catheter (28).

6. The adjustable curved sheath for use under endoscopy as claimed in claim 5, characterized in that: The gear driving shaft (11) is connected to the steel wire (22) via a first baffle (23); the steel wire (22) passes through the first side hole channel (25) and is connected to the bendable catheter head (3) via another first baffle (23); The gear driven shaft (12) is connected to the steel wire (22) via a second baffle (24); the steel wire (22) passes through the second side hole channel (26) and is connected to the bendable catheter head (3) via another second baffle (24).

7. The adjustable curved sheath for use under endoscopy as claimed in claim 6, characterized in that: The bendable catheter head (3) comprises a head (31) and an outer hose (32); the outer hose (32) is connected to the head (31); the catheter inside the outer hose (32) is connected to the inner hose (28) and the middle hose (27) of the catheter (2); the steel wire (22) passes through a first side hole channel (25) inside the outer hose (32) and is welded to the head (31) through another first baffle (23); the steel wire (22) passes through a second side hole channel (26) inside the outer hose (32) and is welded to the head (31) through another second baffle (24).

8. The adjustable curved sheath for use under endoscopy as claimed in claim 5, characterized in that: The inner layer conduit (28) and the outer layer conduit (29) are made of polymer materials, and the middle layer conduit (27) is a stainless steel braided mesh tube.

9. The adjustable curved sheath for use under endoscopy as claimed in claim 7, characterized in that: The head (31) is made of stainless steel.

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