WO2019128772A1

WO2019128772A1 - Neostomy device

Info

Publication number: WO2019128772A1
Application number: PCT/CN2018/121716
Authority: WO
Inventors: 刘鹏
Original assignee: 先健科技(深圳)有限公司
Priority date: 2017-12-29
Filing date: 2018-12-18
Publication date: 2019-07-04
Also published as: CN109984809A; CN109984809B

Abstract

A neostomy device (100), comprising a gripping means (10), a cutting means (20), and a control handle (30) used for controlling the gripping means (10) and the cutting means (20). The gripping means (10) comprises a catheter body (11), a gripping part (12), and a negative pressure means (13); the negative pressure means (13) is connected to the catheter body (11), and the gripping part (12) is provided in the catheter body (11); the cutting means (20) comprises a cutting member (21), which is provided between a distal end of the gripping part (12) and an end face of a distal end of the catheter body (11); the control handle (30) controls the cutting member (21) to move. The size of a distal end of the neostomy device (100) is small, operations are simple and highly reliable, and an opening left after the neostomy is regular and has a stable shape.

Description

Ostomy device

Technical field

The invention relates to the field of interventional medical devices, in particular to a ostomy device.

Background technique

Normal contraction and relaxation of the heart is a guarantee for the normal movement of the organism. When abnormalities in the structure or function of the heart lead to ventricular filling or impaired ejection function, a complex clinical syndrome called heart failure is produced. As a serious stage of various heart disease developments, heart failure is becoming the most important cardiovascular disease in the world.

Heart failure can be divided into diastolic heart failure and systolic heart failure. Diastolic heart failure refers to a decrease in ventricular relaxation and a decrease in filling pressure in the case of normal ventricular systolic function, resulting in pulmonary circulation and systemic congestion syndrome. Diastolic heart failure causes an increase in pressure in the left atrium and pulmonary veins, preventing normal flow of oxygenated blood. Nowadays, there are few methods for the treatment of patients with diastolic heart failure. Clinical data indicate that a small hole is formed in the interatrial septum of patients with diastolic heart failure, forming a left-to-right shunt, which is beneficial to reduce the pressure on the left atrium of patients with heart failure. Improve the symptoms of patients with heart failure.

At present, a method for treating heart failure is to first expand the opening to a larger size by a balloon expansion method after the atrial septal tissue is puncture, but the tissue tends to rebound after the balloon is withdrawn to cause the opening to shrink. In another method, the atrial septal tissue is excised by means of blade resection, but the open tissue formed by this method is implicated and irregular, the shape is difficult to control, and the operation time is long.

Based on this, it is necessary to design a septal ostomy device that is easy to operate, highly reliable, and has a regular opening and a stable shape.

Summary of the invention

The technical problem to be solved by the present invention is to provide a room spacing ostomy device which is simple in operation, high in reliability, regular in opening and stable in shape, in view of the defects of the prior art.

The present invention provides a ostomy apparatus comprising a grasping device, a cutting device, and a control handle for controlling the grasping device and the cutting device, the grasping device comprising a catheter body, a grasping portion, and a negative pressure a device, the negative pressure device is connected to the catheter body, the grasping portion is disposed in the catheter body; the cutting device comprises a cutting member, the cutting member is disposed at the distal end of the grasping member and the Between the distal end faces of the catheter body, the control handle controls movement of the cutting member.

In an embodiment, the distal end of the grasping portion is provided with a grasping member, and the distal end of the grasping member does not exceed the distal end surface of the catheter body.

In an embodiment, the gripping portion comprises at least two symmetrically disposed gripping members.

In an embodiment, a distal end of the distal end of the grasping portion is further provided with a stopper, one end of the stopper is connected to the grasping member, and the other end is away from the grasping member and extends toward the inner wall of the catheter. The stopper and the distal end of the gripping member form an angle ranging from 0 to 90 degrees.

In an embodiment, the grasping member is gathered at a distal end in a natural state, the grasping device further includes a support portion, the proximal end of the support portion is connected to the control handle, and the support portion is disposed on the grasping portion. The inner side of the take-up member has an open shape; and when the control handle controls the axial movement of the support portion toward the distal end, the distal end of the support portion abuts against the inner side of the grasping member, so that the grasping member is far away The end forms an opening.

In an embodiment, the support portion includes a support member and a second connection member coupled to the proximal end of the support member, the support member supports the gripping member, the second connector is proximally connected to the Control handle connection.

In an embodiment, the grasping member is provided with a limiting member, and a through hole is formed between the limiting member and the grasping member, and the distal end of the supporting member passes through the through hole.

In an embodiment, the gripping member is provided with an anchoring unit.

In one embodiment, the cutting device further includes a control wire, the distal end of the control wire is coupled to the cutting member, the proximal end of the control wire is coupled to the control handle, and the control handle passes the A control wire controls the movement of the cutting member.

The ostomy device provided by the present invention comprises a grasping device, a cutting device and a control handle for controlling the grasping device and the cutting device, the negative pressure device being connected to the catheter body to provide a negative pressure to the catheter body The gripping portion includes a gripping member disposed within the catheter body and a restriction member axially movable within the catheter body. Compared with the prior art, the grasping device of the present invention is provided with a grasping portion, and the distal end of the grasping portion is provided with a grasping member, and the tissue to be cut is sucked into the catheter body by the action of the negative pressure device, and the control is passed through The end control handle controls the movement of the restriction member, and the grasping member at the distal end of the grasping portion grasps the human body tissue sucked into the catheter body, and then tightens the cutting device through the control handle and energizes, and the cutting operation can be completed under the action of the control handle. Simple. After the cutting is completed, the grasping member at the distal end of the grasping portion is still in a folded state and can clamp the human tissue under cutting and withdraw it with the catheter to the outside of the body, in the process of withdrawing the ostomy device, cutting Human tissue does not fall into the body and poses a risk, and the opening formed by the ostomy device by electrical cutting is stable and does not retract. Moreover, the cutting member of the cutting device of the present invention is disposed between the distal end of the grasping member and the distal end surface of the catheter body rather than surrounding the outer side of the catheter body, which greatly reduces the size of the distal end of the ostomy device and allows access to smaller blood vessels.

DRAWINGS

Figure 1 is a schematic view showing the structure of a ostomy device of the present invention;

2a is a schematic view showing the internal structure of the distal end of the ostomy apparatus according to the first embodiment of the present invention;

Figure 2b is an enlarged schematic view showing a portion of the structure of Figure 2a;

3 is a schematic structural view of a cutting portion in a ostomy device according to a first embodiment of the present invention;

4a is a schematic view showing the internal structure of a distal end of a ostomy apparatus according to a second embodiment of the present invention;

Figure 4b is an enlarged schematic view showing a portion of the structure of Figure 4a;

Figure 5 is a schematic view showing a simplified structure of a grasping member in a ostomy apparatus according to a second embodiment of the present invention;

Fig. 6 is a schematic cross-sectional view showing the grasping portion of the ostomy apparatus according to the second embodiment of the present invention.

Detailed ways

For a better understanding of the technical features, objects and effects of the present invention, the embodiments of the present invention are described in detail with reference to the accompanying drawings.

In order to more clearly describe the structure of the present invention, "distal" and "near end" are used as the orientation words, which are the conventional terms in the field of interventional medical devices, wherein "distal" means the end away from the operator during the operation, "Proximal" means the end that is close to the operator during the procedure. The "axial direction" refers to the direction in which the distal end of the medical device is connected to the center of the proximal end, and the connection in the direction is the "central axial axis"; the "radial" refers to the direction perpendicular to the axial direction. .

First embodiment

Referring to FIGS. 1 to 2b, the ostomy apparatus 100 of the present embodiment includes a cutting device 20, a grasping device 10, and a control handle 30. The cutting device 20 includes a cutting portion 21 and a high frequency power source 22 for supplying power to the cutting portion 21, and the gripping device 10 includes a catheter body 11, a gripping portion 12, and a negative pressure source 13. The cutting portion 21 is provided inside the catheter body 11 for cutting the body compartment spacer tissue in the catheter body 11 by the ostomy appliance 100. The negative pressure source 13 is in communication with the catheter body 11 for forming a negative pressure in the catheter body 11 to adsorb the human body compartment tissue. The grasping portion 12 is disposed at the distal end of the lumen of the catheter body 11 near the distal end of the catheter body 11, The body compartment spacer for inhaling the ostomy device 100 into the lumen of the catheter body 11. The control handle 30 is disposed at the proximal end of the catheter body 11 and is coupled to the proximal end of the catheter body 11, and the control handle 30 is used to drive the movement of the various components of the ostomy appliance 100.

Further, referring to FIG. 1 to FIG. 2b, the catheter body 11 comprises two parts, and the proximal end portion of the catheter body 11 is provided with a plurality of reinforcing ribs 110, thereby forming a plurality of thin lumens 115 which are not connected to each other to increase The hardness of the proximal end of the catheter body 11 improves the bending resistance of the catheter body 11. The distal end portion of the catheter body 11 is hollow to form a single main lumen 111. In this embodiment, the catheter body 11 can be formed into a multi-cavity structure by a molding device, and the material of the catheter body 11 can be nylon, polytetrafluoroethylene or PEBAX. The ribs 110 are in the form of sheets of equal thickness and are symmetrically distributed along the axis of the conduit 11, and the number may be 2 to 6, preferably 2 to 4. The catheter body 11 is further provided with a lumen 116 coaxial therewith, and the outside of the lumen 116 is connected to the rib 110. In actual use, since the catheter body 11 needs to be inserted into the human body after puncture, in order to avoid the expansion of the puncture point and ensure that the inner diameter of the catheter body 11 meets the demand, it is necessary to reduce the wall thickness of the catheter body 11 when the wall thickness of the catheter body 11 is reduced. After that, the catheter body 11 becomes relatively soft, and the provision of the reinforcing ribs 110 here can effectively increase the strength and bending resistance of the catheter body 11.

It can be understood that, in other embodiments, when the material strength of the catheter body 11 is high, the reinforcing ribs 110 may not be provided, that is, the catheter body 11 is integrally designed as long as the wall thickness of the catheter body 11 is small. The catheter body 11 can have a certain bending resistance.

In other embodiments, it is also possible to enhance the bending resistance by embedding a nickel-titanium wire in the catheter body 11, or to sleeve the support tube in the proximal end portion of the catheter body 11, or to increase the proximal end. Part of the hardness, the purpose of achieving good bending resistance.

Referring again to FIGS. 2a and 2b, the gripping portion 12 includes a gripping member 121, a restricting member 123, a fixing member 122, a first connecting member 126, and a tubular body 125. The grasping member 121 is located at the distal end of the grasping portion 12, and is disposed coaxially with the catheter body 11, and the distal end surface of the grasping member 121 is retracted into the distal end surface of the catheter body 11. The restricting member 123 is coaxially sleeved on the gripping member 121 for controlling the opening and closing of the distal end of the gripping member 121. The first connecting member 126 is connected to the proximal end of the restricting member 123. The first connecting member 126 passes through the lumen 116 and is connected to the control handle 30 at the proximal end for controlling the movement of the restricting member 123 in the axial direction. The tubular body 125 is disposed on the inner wall of the catheter body 11 for fixing the grasping member 121.

A plurality of fixing members 122 are connected to the proximal end of the grasping member 121, and a plurality of clamping jaws 1211 are disposed at the distal end. The plurality of fixing members 122 and the plurality of clamping jaws 1211 are connected by the shaft 1212. The plurality of jaws 1211 are separated from each other from the proximal end to the distal end in a natural state, and the plurality of jaws 1211 can be gathered from each other under the constraint of an external force. The linear distance between any two of the jaws 1211 is smaller than the inner diameter of the catheter body 11, thereby ensuring that the plurality of jaws 1211 can be accommodated in the catheter body 11 in a natural state. A plurality of fixing members 122 are disposed at the proximal end of the grasping portion 12 and extend outward in the circumferential direction. The proximal end of the fixing member 122 is a sheet-like structure, and the fixing member is fixedly connected with the tubular body 125 through the proximal-shaped sheet-like structure, so as to grasp The pickup 121 does not move relative to the catheter body 11 during operation. The number of the fixing members 122 is 2-5, and the present embodiment is preferably 3. The three fixing members 122 are evenly distributed on the circumference of the grasping member 121 along the axis. It can be understood that, in other embodiments, the fixing is fixed. The pieces 122 can also be unevenly distributed.

In the present invention, the grasping portion 12 is fixed to the inner wall of the catheter body 11 by the fixing member 122. When the ostomy device 100 moves in the human body, the distal end of the grasping member 121 does not protrude to the catheter due to the bending of the catheter body 11. Outside the body 11, avoid scratching, cutting, or puncturing the human tissue.

It can be understood that in other embodiments, the fixing member 122 can also be disposed at other positions of the grasping portion 12, and the shape of the fixing member 122 can also be other shapes, such as a column shape, a sheet shape, a barb shape, etc., only need It is ensured that the fixing member 122 can be fixedly attached to the tubular body 125.

In this embodiment, the gripping members 121 are symmetrically disposed with respect to the central axis, and the number of the gripping members 121 may be 2-6, and the number of the embodiment is 2. The number of the jaws 1211 of the grasping member 121 is four, and the four jaws 1211 are gradually separated from the proximal end to the distal end. The clamping claw 1211 is provided with a plurality of anchoring units, and the anchoring unit may be a rib, a serration or the like. In this embodiment, the anchoring unit is a sawtooth. The serrations are disposed on the inner side of the clamping jaws 1211 and can be symmetrically distributed or staggered. The number of serrations is 1 to 10, preferably 4 to 8, and can be evenly arranged or unequally arranged. When a plurality of saw teeth are arranged together, the overall shape may be a triangular wave, a square wave, a sine wave or an arbitrary waveform, or a combination of two or more of the above. The provision of serrations on the jaws 1211 ensures that when the body tissue is clamped, the serrations can be hooked to the body tissue to make the grip more secure.

It will be appreciated that in other embodiments, the anchoring unit on the jaws 1211 may also omit.

It will also be appreciated that in other embodiments, other configurations may be employed in place of the jaws 1211, for example, a grasping net, splint, etc., disposed at the distal end of the grasping member 121.

Referring to FIG. 2a and FIG. 2b again, in the embodiment, the restricting member 123 has a tubular shape as a whole, and the tube wall of the restricting member 123 is provided with a plurality of slots 1231 in the longitudinal direction. The number of the slots 1231 is the same as the number of the fixing members 122. . The restricting member 123 is sleeved on the gripping member 121, and a single fixing member 122 protrudes from a single slot 1231 of the restricting member 123, and the gripping member 121 protrudes from the distal opening of the restricting member 123. Moving the restricting member 123 to the distal end, the plurality of jaws 1211 are restrained and closed; and the restricting member 123 is moved to the proximal end, the restraining action of the restricting member 123 on the clamping portion 1213 gradually disappears, and the jaws 1211 are separated from each other, thereby grasping the member 121. It is in a state capable of accommodating human tissue. The length of the restricting member 123 ranges from 3 to 8 mm, preferably from 4 to 6 mm, and is 5 mm in this embodiment.

The tubular body 125 is disposed on the inner wall of the distal end of the catheter body 11, and the distal end of the tubular body 125 is flush with the distal end of the catheter body 11 or is slightly contracted to the distal end of the catheter body 11. The tube body 125 is used for fixing the gripping member 121. The outer wall of the tube body 125 and the inner wall of the duct body 11 can be fixed by bonding. The fixing member 122 of the gripping member 121 can be fixed to the inner wall of the tube body 125 by welding or bonding. Therefore, it is ensured that the grasping member 121 does not generate axial movement during the operation, and the distal end of the grasping member 121 is prevented from being exposed from the distal end of the catheter body 11 to scratch the human tissue.

It can be understood that in other embodiments, the tube body 125 may not be disposed, and the polymer material may be sleeved on the fixing member 122, and directly connected to the inner wall of the catheter body 11 by heat fusion or adhesive bonding.

Further, in this embodiment, the material of the tube body 125 may be selected from a metal material such as a nickel-titanium alloy, a stainless steel or a cobalt-chromium alloy, which can be processed by mechanical wire cutting, cold-pressed by a metal ring, or by selective laser sintering. 3D printing technology is available. The body shape of the tubular body 125 may be a circular, elliptical or combined profile.

The distal end of the first connecting member 126 is fixedly connected to the proximal end of the limiting member 123. The proximal end of the first connecting member 126 is connected to the control handle 30, and the first connecting member 126 is controlled to move axially by the control handle 30, thereby controlling the limiting member 123. Axial movement.

It can be understood that in other embodiments, the first connecting member 126 can also be omitted. At this time, the proximal end of the restricting member 123 can be directly connected to the control handle 30.

Referring again to Figures 2a and 2b, the ostomy apparatus of the present embodiment is further provided with a stop member 124 adjacent the distal end portion of the grasping member 121. One end of the stopper 124 is connected to the gripping member 121, and the other end extends away from the gripping member 121 toward the inner wall of the catheter body 11. Therefore, an angle is formed between the stopper 124 and the distal end of the gripping member 121, and the angle of the included angle ranges from 0 to 90°.

Referring to Figures 2a to 3 together, the cutting portion 21 of the present embodiment includes a cutting member 212 and a control wire 211. The cutting member 212 is mounted on the angled structure formed by the stopper 124 and the gripping member 121. The cutting member 212 has a substantially annular structure that is perpendicular to the axial direction of the catheter body 11. The control wire 211 passes through a wall cavity (not shown) provided on the inner wall of the catheter body 11 and is connected to the cutting member 212 at the distal end and to the control handle 30 at the proximal end. The control wire 211 can be moved proximally under the control of the control handle 30, while the cutting member 212 is first moved radially relative to the catheter body 11, and the cutting member 212 is partially received into the lumen wall cavity, thereby tightening through The object of the cutting member 212; after the cutting member 212 is partially received into the wall of the tube wall, the control wire 211 is further moved to the proximal end to drive the cutting member 212 to be axially moved into the wall portion of the tube wall, and further tightened through the cutting portion. The object of piece 212. The cutting portion 21 of the present embodiment is made of a metal material having good electrical conductivity.

It can be understood that, in other embodiments, the stopper may not be provided. At this time, the cutting member of the cutting portion is disposed between the distal end of the grasping member and the end surface of the catheter body, and the cutting member is attached to the inner wall of the catheter. And the stiffness of the material depends on the positional displacement of the ostomy device in the lumen of the human body. Relative to the structure for arranging the cutting member on the outer side of the distal end of the grasping member, the cutting member is disposed between the distal end of the grasping member and the end surface of the catheter body to ensure that the grasping member is not grasped when the cutting member is tightened. Together, the cutting reliability is higher.

Referring again to FIG. 1, in the embodiment of the present invention, the grasping device 10 and the cutting device 20 further include a negative pressure device 13 and a high frequency power source 22, respectively. The vacuum device 13 is connected to the control handle 30 via a first connecting pipe 301, and the high frequency power source 22 is connected to the control handle 30 via a second connecting pipe 302. The negative pressure device 13 is for adsorbing human tissue into the catheter body 11, and the high-frequency power source 22 is configured to pass a high-frequency current to the cutting portion 21 and form a circuit with a neutral electrode plate (not shown) of the patient's body surface. Thereby, the human tissue sucked by the catheter body 11 is cut. The high frequency power source 22 has an operating frequency of 300 kHz to 5 MHz, preferably, the frequency range is 400 kHz to 1000 kHz, and the output power of the high frequency power source 22 is 0 to 300 w. Preferably, the power range is 50 to 100 w.

The working process of the ostomy device 100 during the atrial septum is further described below.

When the atrial septum is made by the ostomy apparatus 100 of the embodiment, the catheter body 11 is percutaneously punctured into the human body and reaches the heart. The distal end surface of the catheter body 11 abuts against the interatrial septum, and drives the negative pressure device 13 at a negative pressure. Part of the human tissue is sucked into the catheter body 11 under the action. The control handle 30 is further operated to cause the first link member 126 to move the restricting member 123 to the distal end surface, and the jaws 1211 are gradually clamped in the radial direction of the catheter body 11. The serrations on the jaws 1211 are capable of reversing the housing spacers so that the gripping members 121 hold the body tissue securely. Further, the control wire 211 is pulled toward the proximal end by the control handle 30, so that the cutting portion 21 is gradually deformed, and under the action of the inner wall of the tube wall cavity, the cutting portion 21 is gradually squeezed and bound into a straight line, and is gradually accommodated in the tube wall cavity. . When the cutting portion 21 continuously enters the wall cavity, the human body spacer tissue sucked into the catheter body 11 will also be trapped by the cutting portion 21, and during the process of continuously tightening the cutting portion 21, the high frequency power source 22 can be used by the clinician. Under control, a high-frequency current is delivered to the cutting portion 21, and a circuit is formed with a neutral electrode plate (not shown) of the patient's body surface, thereby excising the body atrial space tissue sucked by the catheter body 11. The removed human body tissue is still clamped by the grasping member 121, and at the same time, due to the limiting action of the restricting member 123, the grasping member 121 is firmly clamped to the human body and is not cut by the movement, vibration, etc. of the ostomy device 100. The body tissue is dropped, which improves the safety of the operation. In addition, the cutting member of the cutting portion of the present invention is disposed in the catheter body, thereby avoiding scratching of the outer wall of the catheter by the metal cutting member, improving the integrity of the instrument and the safety of the operation.

Second embodiment

This embodiment differs from the first embodiment in the gripping device. The grasping device of the present embodiment includes a support portion 43 in addition to the catheter body 41, the grasping portion 42, and the negative pressure device, and the grasping portion 42 is also different from the first embodiment. The cutting portion 51 of this embodiment is disposed between the distal end of the grasping member 421 and the distal end surface of the catheter body 41.

Referring to FIGS. 4 a to 5 , the gripping portion 42 of the present embodiment includes a fixing member 422 , a gripping member 421 , and a limiting member 423 . The fixture 422 is a hollow tubular structure having an axial opening 425 at the distal end, the proximal end being coupled to the control handle. The grasping member 421 is a structure having an arcuate cross section, the proximal end is connected to the fixing member 422, and the distal end is provided with an anchoring structure 424 facing the central axis. The anchoring structure 424 is formed by heat setting bending of the distal end of the gripping member 421, and the end portion may preferably be formed into a pointed anchor structure. A retaining member 423 is further disposed on the gripping member 421. The two ends of the limiting member 423 are connected to the gripping member 421, and a through hole is formed between the limiting member 423 and the gripping member 421, thereby restricting the moving position of the supporting portion 43 passing through the through hole, without being opposed to The gripping member 421 is circumferentially displaced. The gripping members 421 are symmetrically disposed with respect to the central axis, and the number of the gripping members 421 is 2 to 6, which is two in this embodiment. Further, the grasping member 421 and the fixing member 422 of the embodiment are integrally formed and formed. Referring to FIG. 5, in the natural state, the grasping member 421 of the embodiment is in a folded state; when the grasping member 421 is subjected to a radially outward external force, deformation occurs. At this time, the distal ends of the plurality of gripping members 421 are mutually Move away to form a larger opening that can accommodate other objects.

In other embodiments, an anchoring structure may also be provided on both side edges of the gripping member.

In other embodiments, the fixture may also be other structures having axial openings, not limited to hollow tubular structures. For example, it may be cylindrical, sheet-like or other shape. In this case, the proximal end of the fixing member may be connected to the inner wall of the adjacent catheter, and the support member can support the grasping member as long as the connecting member of the supporting portion can be ensured to pass through the axial opening. Take the piece, and the grasping part can be fixed with respect to the catheter body.

4a, 4b, and 6, the support portion 43 of the present embodiment is disposed inside the grasping member 421 and has an open end at the distal end. The support portion 43 includes a second connecting member 432 and a support member 431. The distal end of the second connecting member 432 is connected to the supporting member 431, and the proximal end is fixed to the control handle. When the second connecting member 432 is controlled to move axially by the control handle, the supporting member can be driven to move together. The structure of the support member 431 is substantially the same as that of the grasping member 421, and the number is also the same as that of the grasping member 421, except that the support member 431 is shaped by hot working, has a certain angle with the axial direction, and the plurality of support members 431 are combined to support the support member 431. The distal end of the portion 43 forms an opening having an angle. As shown in FIG. 6 , the support member 431 has an arc shape in cross section, and passes through a through hole formed between the limiting member 423 and the gripping member 421 , that is, the supporting member 431 is located between the gripping member 421 and the limiting member 423 . The curved surface of the support member 431 cooperates with the curved surface of the gripping member 421 to be movable along the gripping member 421.

In this embodiment, after the distal end of the support member 431 passes through the through hole formed between the limiting member 423 and the grasping member 421, a radially outward force is applied to the grasping member 421, so that the plurality of grasping members 421 are at When the support member 431 is moved to the proximal end, it is equivalent to undoing the force applied by the support member 431 to the grasping member 421, and the grasping member 421 is restored to the collapsed state. The support member 431 and the grasping member 421 of the embodiment can be made of the same metal material, and the rigidity of the support member 431 is greater than that by the selection of the diameter, the thickness, the cutting texture, the sandblasting and the like. The rigidity of the take-up piece 421.

It can be understood that, in other embodiments, the retaining member may not be provided with a limiting member. In this case, the grasping member may be configured to have an inner groove or a cross-sectional concave structure, as long as the supporting member is built. The delivery of the oral device is not displaced relative to the grasping member.

When the atrial septum is used for the atrial septum using the ostomy apparatus of the present embodiment, the operation process is basically the same as that of the first embodiment, except that the gripping member 421 is made by retracting the support portion 43 when the interatrial space is clamped. Return to the collapsed state, clamp the tissue, and then perform subsequent cutting operations. Compared with the first embodiment, after the ostomy device of the embodiment clamps the tissue, the grasping member can maintain a good clamping state without applying other objects, and the structure and operation of the ostomy device are appropriately simplified. .

The technical features of the above-described embodiments may be arbitrarily combined. For the sake of brevity of description, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be considered as the scope of this manual.

The above-described embodiments are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the invention. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims

A ostomy device comprising a grasping device, a cutting device, and a control handle for controlling the grasping device and the cutting device, wherein the grasping device comprises a catheter body, a grasping portion, and a negative pressure a device, the negative pressure device is connected to the catheter body, the grasping portion is disposed in the catheter body; the cutting device comprises a cutting member, the cutting member is disposed at the distal end of the grasping member and the Between the distal end faces of the catheter body, the control handle controls movement of the cutting member.
The ostomy apparatus according to claim 1, wherein the distal end of the grasping portion is provided with a grasping member, and the distal end of the grasping member does not exceed the distal end surface of the catheter body.
The ostomy apparatus according to claim 2, wherein the gripping portion comprises at least two symmetrically disposed gripping members.
The ostomy apparatus according to claim 3, wherein a distal end of the distal end of the grasping portion is further provided with a stopper, and one end of the stopper is connected to the grasping member, and the other end is away from the grasping member. The pick-up extends toward the inner wall of the catheter, and the stop forms an angle with the distal end of the grasping member ranging from 0 to 90 degrees.
The ostomy apparatus according to claim 3, wherein the grasping member is gathered at a distal end in a natural state, and the grasping device further includes a support portion, and the proximal end of the support portion is connected to the control handle. The support portion is disposed on the inner side of the gripping member, and the distal end is open; when the control handle controls the axial movement of the support portion toward the distal end, the distal end of the support portion abuts the grasping member On the inner side, the distal end of the gripping member is formed into an opening.
The ostomy apparatus according to claim 5, wherein the support portion includes a support member and a second connection member coupled to the proximal end of the support member, the support member supporting the grasping member, A proximal end of the second connector is coupled to the control handle.
The ostomy apparatus according to claim 6, wherein the grasping member is provided with a limiting member, a through hole is formed between the limiting member and the grasping member, and the supporting member is worn at a distal end. Through the through hole.
The ostomy apparatus according to any one of claims 2 to 7, wherein the grasping member is provided with an anchoring unit.
The ostomy apparatus according to any one of claims 2 to 7, wherein said cutting device further comprises a control wire, said distal end of said control wire being coupled to said cutting member, said control wire being near An end is coupled to the control handle, and the control handle controls movement of the cutting member by the control wire.