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 the 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 utility model belongs to the technical field of medical apparatus and instruments, and particularly relates to an adjustable bending sheath used under an endoscope. BACKGROUND

[0002] At present, in the treatment of digestive endoscopy, the endoscope as the main equipment bears the role of providing images, and all the treatment medical instruments enter through the forceps of the endoscope device. Meanwhile, due to the anatomical structure of the human body, the length of the endoscope is more than 1 meter. After the treatment medical instruments enter through the forceps, the instruments are not easy to control. Meanwhile, affected by the patient's breathing, body fat, and the stability of the operator's control of the instruments, the instruments are often not in place, and it is difficult to locate the hidden lesions.

[0003] In the treatment of digestive endoscopy, the following problems are encountered:

[0004] 1. In all surgeries with endoscopic treatment needs, treatment medical instruments need to enter through the forceps, and there are problems of not easy to control, and not in place of the delivery instrument, and difficult to locate the hidden lesions.

[0005] 2. If the patient is fat, it is not possible to expose the lesion site by moving and pushing the patient's abdomen, or due to the patient's breathing interference, the operator's hand instability, and other situations, there is no device that can increase the support and stability of the entering instrument to accurately reach the lesion site.

[0006] 3. In addition, the operation of endoscopic treatment is difficult, and it is difficult for experienced operators to let young operators practice the operation process. There is no convenient operation device to pre-position to the lesion site, and then let young operators deliver instruments. Therefore, medical students and inexperienced operators have the problem of low success rate of surgery. INVENTION CONTENTS

[0007] In order to solve the above problems, the utility model provides: an adjustable bending sheath used under an endoscope, comprising 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 inside the handle, and the catheter is connected with the bendable catheter head.

[0008] Further, the rotating device comprises a rotating nut, a gear driving shaft, a gear driven shaft and a gear, the direction adjusting knob is connected with the rotating nut, the rotating nut is connected with the gear driving shaft and the gear driven shaft, the gear driving shaft and the gear driven shaft are provided with the gear therebetween, the gear driving shaft and the gear driven shaft are connected with the catheter, the rotating device is arranged inside the handle shell, and the direction adjusting knob is threadedly connected with the handle shell through a spring piece.

[0009] Further, the direction adjusting knob is axially fixedly connected with the rotating nut through a pin.

[0010] Further, a limiting clamping groove is arranged on the rotating nut.

[0011] Further, the catheter body of the catheter is internally and externally provided with an inner layer catheter, a middle layer catheter and an outer layer catheter, and the first side hole channel and the second side hole channel are arranged in the inner layer catheter.

[0012] Further, the gear driving shaft is connected with the steel wire through a first blocking piece, the steel wire passes through the first side hole channel and is connected with the bendable catheter head through another first blocking piece.

[0013] The gear driven shaft is connected with the steel wire through a second blocking piece, and the steel wire passes through the second side hole channel and is connected with the bendable catheter head through another second blocking piece.

[0014] Further, the bendable catheter head comprises a head portion and an outer layer hose, the outer layer hose is connected with the head portion, the catheter in the outer layer hose is communicated with the inner layer catheter and the middle layer catheter of the catheter, the steel wire passes through the first side hole channel in the outer layer hose and is weldedly connected with the head portion through another first blocking piece, and the steel wire passes through the second side hole channel in the outer layer hose and is weldedly connected with the head portion through another second blocking piece.

[0015] Further, the inner layer catheter and the outer layer catheter are made of high polymer material, and the middle layer catheter is a stainless steel woven mesh tube.

[0016] Further, the head portion is made of stainless steel material.

[0017] The device is used for supporting and guiding treatment instruments under a digestive endoscope, improves the stability and accuracy of the conveying instruments, reduces the operation time, can perfectly adapt to all endoscopes on the market, improves the stability and supportability of the subsequent treatment instruments, shortens the operation time, and enables the operators in the areas with insufficient experience and unskilled operation to improve the operation success rate.

[0018] 1. The device can be used in all operations with endoscopic treatment requirements, and the disposable adjustable bending sheath under the endoscope is conveyed into the forceps channel, and then all instruments are conveyed to the lesion position through the device.

[0019] 2. If the patient is obese and cannot expose the lesion position by moving and pushing the patient's abdomen, or if the patient's breathing is disturbed, the operator's hand is unstable, etc., the adjustable bending sheath can increase the supportability and stability of the entering instruments and accurately reach the lesion position.

[0020] 3. For some young operators, senior operators can first pre-position the adjustable bending sheath to the lesion site, and then let the young operator deliver the instrument, which can improve the success rate of surgery for medical students and inexperienced operators. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The adjustable bending sheath is shown in the whole structure diagram of the utility model.

[0022] Figure 2 The adjustable bending sheath is shown in the whole structure diagram of the utility model. Figure 1 ;

[0023] Figure 3 The adjustable bending sheath is shown in the whole structure diagram of the utility model. Figure 2 ;

[0024] Figure 4 The rotating device is shown in the structure diagram of the utility model.

[0025] Figure 5 The catheter is shown in the structure diagram of the utility model.

[0026] Figure 6 The catheter is shown in the structure diagram of the utility model.

[0027] Figure 7 The rotating device is shown in the structure diagram of the utility model.

[0028] Figure 8 The adjustable bending sheath is shown in the whole structure diagram of the utility model. Figure 1 ;

[0029] Figure 9 The adjustable bending sheath is shown in the whole structure diagram of the utility model. Figure 2 .

[0030] 1, handle, 2, catheter, 3, bendable catheter head, 31, head, 32, outer hose, 4, direction adjusting knob, 11, gear driving shaft, 12, gear driven shaft, 13, rotating nut, 14, pin, 15, clamping groove, 16, elastic sheet, 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 layer catheter, 28, inner layer catheter, 29, outer layer catheter. DETAILED DESCRIPTION

[0031] In order to make the technical means and purposes of the utility model easy to understand, the utility model is further described below in combination with specific embodiments, a kind of adjustable bending sheath for endoscopy, 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, and the direction adjustment knob 4 is connected to the catheter 2 through a rotating device inside the handle 1. The catheter 2 is connected to the bendable catheter head 3.

[0032] Among them, such as Figures 2-4 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, and 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 the handle housing 17, and the direction adjustment knob 4 is threadedly connected to the handle housing 17 through a spring 16.

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

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

[0035] Among them, such as 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, such as 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 . 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, such as Figure 5 、 Figures 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. 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 high polymer material, and the middle layer conduit 27 is a stainless steel woven mesh tube.

[0040] The head 31 is made of stainless steel material.

[0041] Function description: by rotating the direction adjusting knob 4, the direction of the bendable conduit head 3 can be adjusted, as follows:

[0042] The direction adjusting knob 4 and the rotating nut 13 are axially fixed by the pin 14, and the direction adjusting knob 4 is limited in radial movement by the clamping groove 15 structure. The direction adjusting knob 4 and the rotating nut 13 can rotate together.

[0043] By the handle spring 16 structure, the direction adjusting knob 4 and the handle shell 17 can maintain a certain friction force, which can prevent the direction adjusting knob 4 from easily bouncing back after rotating to a certain angle.

[0044] The rotating nut 13 and the gear driving shaft 11 are threadedly connected. When the direction adjusting knob 4 drives the rotating nut 13 to rotate forward or backward, the rotating nut 13 drives the gear driving shaft 11 to move forward or backward, and the gear driving shaft 11 drives the gear 18 to rotate. The axis of the gear 18 does not change relative to the position of the shell. The gear 18 drives the gear driven shaft 12 to move forward or backward. In this way, the gear driving shaft 11 and the gear driven shaft 12 can move in opposite directions by the same displacement.

[0045] The conduit structure is shown in Figure 6 The inner layer conduit 28 has two side hole channels, i.e., a first side hole channel 25 and a second side hole channel 26. The inner layer conduit 28 is made of high polymer material, the middle layer conduit 27 is a stainless steel woven mesh tube, and the outer layer conduit 29 is made of high polymer material.

[0046] The bendable conduit head 3 also has a three-layer structure. The head 31 is connected and fixed with the first baffle 23 and the second baffle 24, and the head 31 is also made of stainless steel material. The head 31 can be connected with the first baffle 23 and the second baffle 24 by welding. The middle layer and the inner layer are connected with the entire conduit, and the outer layer tube is a soft tube. In this way, when the first baffle 23 and the second baffle 24 are stretched, the mesh tube inside the bendable conduit head 3 can be compressed or stretched.

[0047] The first baffle 23 and the second baffle 24 are respectively fixed at 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 of bending the bendable conduit head 3.

[0048] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and concept of the present application, can make equivalent substitutions or changes within the technical range disclosed by the present application, which should be encompassed in the protection scope of the present application.

Claims

1. An adjustable curve sheath for use under an endoscope, characterized by, It comprises a handle (1), a catheter (2), a bendable catheter head (3) and a direction adjusting knob (4), the handle (1) is connected with the direction adjusting knob (4), the direction adjusting knob (4) is connected with the catheter (2) through a rotating device inside the handle (1), and the catheter (2) is connected with the bendable catheter head (3).

2. The adjustable curve sheath for endoscopic use of claim 1, wherein, The rotating device comprises a rotating nut (13), a gear driving shaft (11), a gear driven shaft (12) and a gear (18), the direction adjusting knob (4) is connected with the rotating nut (13), the rotating nut (13) is connected with 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 with the catheter (2), and the rotating device is arranged inside a handle shell (17).

3. The adjustable curve sheath for endoscopic use of claim 2, wherein, The direction adjusting knob (4) is axially fixedly connected with the rotating nut (13) through a pin (14).

4. The adjustable curve sheath for endoscopic use of claim 3, wherein, A limiting clamping groove (15) is arranged on the rotating nut (13).

5. The adjustable curve sheath for endoscopic use of claim 4, wherein, A 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 inside to outside, and the inner layer catheter (28) is provided with a first side hole passage (25) and a second side hole passage (26).

6. The adjustable curve sheath for endoscopic use of claim 5, wherein, The gear driving shaft (11) is connected with a steel wire (22) through a first blocking piece (23), the steel wire (22) passes through the first side hole passage (25) and is connected with the bendable catheter head (3) through another first blocking piece (23); The gear driven shaft (12) is connected with the steel wire (22) through a second blocking piece (24), the steel wire (22) passes through the second side hole passage (26) and is connected with the bendable catheter head (3) through another second blocking piece (24).

7. The adjustable curve sheath for endoscopic use of claim 6, wherein, The bendable catheter head (3) comprises a head portion (31) and an outer layer hose (32), the outer layer hose (32) is connected with the head portion (31), a catheter inside the outer layer hose (32) is communicated with the inner layer catheter (28) and the middle layer catheter (27) of the catheter (2), the steel wire (22) passes through a first side hole passage (25) inside the outer layer hose (32) and is welded with the head portion (31) through another first blocking piece (23), and the steel wire (22) passes through a second side hole passage (26) inside the outer layer hose (32) and is welded with the head portion (31) through another second blocking piece (24).

8. The adjustable curve sheath for endoscopic use of claim 5, wherein, The inner layer catheter (28) and the outer layer catheter (29) are made of high polymer material, and the middle layer catheter (27) is a stainless steel woven mesh tube.

9. The adjustable curve sheath for endoscopic use of claim 7, wherein, The head portion (31) is made of stainless steel material.

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