CN112603467A

CN112603467A - Ultrasonic knife for flexible endoscope

Info

Publication number: CN112603467A
Application number: CN202011479699.6A
Authority: CN
Inventors: 刘奇为; 周平红
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2021-04-06

Abstract

The invention discloses an ultrasonic knife for a flexible endoscope, which comprises a handle part, a protective sleeve and an ultrasonic knife head end, wherein the front end of the handle part is connected with the tail end of the protective sleeve; the ultrasonic tool bit end comprises a tool bit and a clamp head piece; the cutter head is fixedly connected with the transducer through a cutter head connecting rod; the energy converter is movably arranged in the energy converter bridge; the energy converter can drive the cutter head to reciprocate relative to the energy converter bridge; the energy converter bridge is fixedly arranged at the front end of the protective sleeve through a fixed bridge. The invention concentrates all hard components at the front end, only the ultrasonic scalpel end and the front end of the protective sleeve are the hard components, and most of the protective sleeve are soft components, so that the ultrasonic scalpel can be applied to minimally invasive digestive endoscopy surgery guided by a soft endoscope, and tissue coagulation is realized.

Description

Ultrasonic knife for flexible endoscope

Technical Field

The invention relates to a medical instrument, in particular to an ultrasonic knife for a flexible endoscope.

Background

Medical supersound sword can be ultrasonic mechanical vibration energy with high-frequency electric energy conversion to transmit it to the tool bit, transmit ultrasonic energy simultaneously, make the histiocyte with the tool bit contact in the twinkling of an eye moisture gasification, the broken cell of protein hydrogen bond disintegrates, thereby cuts open the tissue, but also can accomplish the hemostatic purpose of solidifying simultaneously.

Compared with a high-frequency electric knife, the ultrasonic knife has low thermal damage, and is widely applied to fine surgical operations. The medical ultrasonic scalpel is applied to well solve the problem of bleeding during operation, so that the bleeding amount during operation is greatly reduced, and the medical ultrasonic scalpel is a great advantage for smooth operation and safety of patients.

However, the conventional ultrasonic scalpel for operation must use the mode of rigidly and directly connecting the ultrasonic transducer and the horn with the scalpel head, and the direct connection cannot have too long connection length, otherwise, the mechanical energy cannot meet the requirement of tissue coagulation because of too large loss. Therefore, the existing ultrasonic knife is mainly applied to minimally invasive surgery guided by a hard tube endoscope, and cannot be directly applied to digestive endoscopy surgery guided by a soft tube endoscope, and currently, digestive endoscopes (such as gastroscopes, enteroscopes, duodenoscopes and the like) still mainly use a high-frequency electric knife, and the high-frequency electric knife has the defects of large thermal injury and difficulty in mastering the coagulation cutting effect in the operation process.

Disclosure of Invention

The technical problem to be solved by the invention is to provide an ultrasonic knife for a flexible endoscope, which can enable the ultrasonic knife to be applied to tissue coagulation in a minimally invasive digestive endoscopy operation under the guidance of the flexible endoscope.

In order to solve the technical problems, the technical solution of the ultrasonic scalpel for the flexible endoscope of the present invention is:

the ultrasonic scalpel comprises a handle part 3, a protective sleeve 2 and an ultrasonic scalpel head end 1, wherein the front end of the handle part 3 is connected with the tail end of the protective sleeve 2, and the front end of the protective sleeve 2 is connected with the ultrasonic scalpel head end 1; the ultrasonic cutter head end 1 comprises a cutter head 1-1 and a tong head piece 1-2; the cutter head 1-1 is fixedly connected with the transducer 1-4 through a cutter head connecting rod 1-5; the energy converter 1-4 is movably arranged in the energy converter bridge frame 1-3; the energy converter 1-4 can drive the cutter head 1-1 to reciprocate relative to the energy converter bridge 1-3; the energy converter bridge 1-3 is fixedly arranged at the front end of the protective sleeve 2 through a fixed bridge 1-8.

In another embodiment, the transducers 1-4 are located in the front lumen of the sheath 2; and/or the transducer bridge 1-3 is arranged in the front-end pipe cavity of the protective sleeve 2.

In another embodiment, the fixed end of the pincer element 1-2 is connected with the fixed bridge frame 1-8 through a hinge structure, the tail end of the pincer element 1-2 is fixedly connected with one end of a traction steel wire rope 5, the traction steel wire rope 5 penetrates through the protective sleeve 2, and the other end of the traction steel wire rope is fixedly connected with the handle part 3.

In another embodiment, the fixed end of the jaw member 1-2 is sleeved on the hinge shaft 1-8-1 of the fixed bridge frame 1-8, and the jaw member 1-2 can rotate relative to the hinge shaft 1-8-1; the articulated shaft 1-8-1 is connected with the plier head piece 1-2 through a torsional spring 1-8-2.

In another embodiment, the transducer bridge 1-3 is coupled to the transducers 1-4 by rails.

In another embodiment, the tail of the transducer 1-4 is connected with a cable 6, and the cable 6 is arranged in the protective sleeve 2 in a penetrating way.

In another embodiment, the interior of the cutting head 1-1 is hollow.

In another embodiment, the upper part of the cutting head 1-1 is formed with two opposite slopes 1-1-1, so that the upper part of the cutting head 1-1 is higher in the middle and lower in two sides.

In another embodiment, the bottom of the jaw members 1-2 mates with the upper portion of the cutting head 1-1.

In another embodiment, the bottom surface of the jaw piece 1-2 forms a central raised part 1-2-1, the two sides of the central raised part 1-2-1 form side wings 1-2-2, respectively, and the bottom surfaces of the side wings 1-2-2 are provided with transverse striations.

The invention can achieve the technical effects that:

the invention concentrates all hard components at the front end, only the ultrasonic scalpel end and the front end of the protective sleeve are the hard components, and most of the protective sleeve are soft components, so that the ultrasonic scalpel can be applied to minimally invasive digestive endoscopy surgery guided by a soft endoscope, and tissue coagulation is realized.

The length of the front end rigid component of the invention is not more than 13mm, and the front end space of the protective sleeve is utilized to accommodate the rigid components such as the transducer, so that the outer diameter of the rigid component is controlled within the range of 2.8-3.4 mm, and the instrument size requirement of the digestive endoscope can be met.

The shape and operation of the invention are similar to those of the clinical common thermal biopsy forceps, and the invention conforms to the operation habit of doctors.

The invention combines the traditional surgical ultrasonic knife with the flexible endoscope, minimizes the volume of the ultrasonic knife head end, and enables the ultrasonic knife therapeutic apparatus to be applied to the minimally invasive surgery under the flexible endoscope.

Drawings

It is to be understood by those skilled in the art that the following description is only exemplary of the principles of the present invention, which may be applied in numerous ways to achieve many different alternative embodiments. These descriptions are made for the purpose of illustrating the general principles of the present teachings and are not meant to limit the inventive concepts disclosed herein.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the general description given above and the detailed description of the drawings given below, serve to explain the principles of the invention.

The invention is described in further detail below with reference to the following figures and detailed description:

FIG. 1 is a schematic external view of an ultrasonic blade for a flexible endoscope according to the present invention;

FIG. 2 is a schematic cross-sectional view of an ultrasonic blade end of the present invention; the clamp head is in a closed state;

FIG. 3 is a schematic view of the open and closed condition of the jaws of the ultrasonic blade end of the present invention;

FIG. 4 is an enlarged schematic view of section A of FIG. 1;

fig. 5 is a schematic view of the profile of the ultrasonic blade end of the present invention.

The reference numbers in the figures illustrate:

1 is an ultrasonic cutter head end, 2 is a protective sleeve,

3 is a handle part, 4 is a conical tube,

5 is a traction steel wire rope, 6 is a cable,

1-1 is a cutter head, 1-2 is a tong head piece,

1-3 is a transducer bridge, 1-4 is an ultrasonic transducer,

1-5 are tool bit connecting rods, 1-6 are built-in springs,

1-8 are fixed bridge frames which are fixed,

1-8-1 is a hinged shaft, 1-8-2 is a torsional spring,

3-1 is a sliding movable pull ring, 3-2 is a handle fixing ring,

3-3 is a cable connecting interface,

5-1 is a steel wire rope hook.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. As used herein, the terms "first," "second," and the like, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" and similar words are intended to mean that the elements or items listed before the word cover the elements or items listed after the word and their equivalents, without excluding other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

As shown in fig. 1, the ultrasonic scalpel for a flexible endoscope of the present invention comprises a handle portion 3, a sheath tube 2, and an ultrasonic scalpel end 1, wherein the front end of the handle portion 3 is connected to the tail end of the sheath tube 2 through a tapered tube 4, and the front end of the sheath tube 2 is connected to the ultrasonic scalpel end 1;

as shown in fig. 2, the ultrasonic blade end 1 comprises a blade head 1-1 and a jaw piece 1-2; the interior of the cutter head 1-1 is hollow, and the tail end of the cutter head 1-1 is fixedly connected with an ultrasonic transducer 1-4 through a cutter head connecting rod 1-5;

the energy converter 1-4 is movably arranged in the energy converter bridge 1-3, and the energy converter bridge 1-3 is fixedly arranged at the rear part of the fixed bridge 1-8; the rear part of the fixed bridge frame 1-8 is fixedly connected with the front end of the protective sleeve 2, so that the transducer 1-4 is positioned in the inner cavity of the front end of the protective sleeve 2; the front parts of the fixed bridges 1 to 8 extend out of the protective sleeve 2;

the front part of the fixed bridge frame 1-8 is provided with a connecting rod through hole so that the cutter head connecting rod 1-5 passes through the front part of the fixed bridge frame 1-8;

the energy converter 1-4 is connected with the energy converter bridge 1-3 through a guide rail, and the energy converter 1-4 can do axial (front and back direction) reciprocating motion relative to the energy converter bridge 1-3 along the guide rail, so that the cutter head connecting rod 1-5 drives the cutter head 1-1 to do reciprocating motion;

the tail part of the transducer 1-4 is connected with a cable 6; the cable 6 is arranged in the protective sleeve 2 in a penetrating way and is used as a driving power source of the transducers 1-4;

the fixed end of the tong head part 1-2 is connected with the front part of the fixed bridge frame 1-8 through a hinge structure, and the tail end of the tong head part 1-2 is fixedly connected with one end of a traction steel wire rope 5 through a steel wire rope hook 5-1; the traction steel wire rope 5 penetrates through the protective sleeve 2, and the other end of the traction steel wire rope 5 is fixedly connected with the handle part 3;

the tool bit part 1-2 can be driven to rotate anticlockwise around the fixed end of the tool bit part under the traction of the traction steel wire rope 5, the front end of the tool bit part 1-2 is driven to be close to the tool bit 1-1, and therefore the tool bit part 1-2 and the tool bit 1-1 are closed, and the tool bit 1-1 is shown in figure 3;

as shown in fig. 4, the fixed end of the pincer head member 1-2 is sleeved on the hinge shaft 1-8-1 of the fixed bridge frame 1-8, and the pincer head member 1-2 can rotate relative to the hinge shaft 1-8-1; the articulated shaft 1-8-1 is connected with the plier head piece 1-2 through a torsional spring 1-8-2; when the traction steel wire rope 5 is pulled to enable the jaw piece 1-2 to rotate anticlockwise, the jaw piece 1-2 drives the torsion spring 1-8-2 to rotate, and the torsion spring 1-8-2 stores energy; and (3) loosening the traction steel wire rope 5, releasing energy by the torsion spring 1-8-2, and driving the jaw piece 1-2 to reset, so that the front end of the jaw piece 1-2 is far away from the tool bit 1-1, and the jaw piece 1-2 and the tool bit 1-1 are opened.

As shown in figure 1, the handle part 3 has the same structure as the conventional thermal biopsy forceps, and comprises a slidable movable pull ring 3-1 and a handle fixing ring 3-2, wherein the slidable movable pull ring 3-1 is fixedly connected with the other end of a traction steel wire rope 5; the slidable movable pull ring 3-1 can reciprocate relative to the handle fixing ring 3-2 so as to pull the traction steel wire rope 5; the front end of the handle part 3 is provided with a cable connection interface 3-3.

The protective sleeve 2 is made of materials, has a structure and a length equal to those of the conventional biopsy forceps, and the outer diameter of the protective sleeve 2 can be 2.8-3.5 mm according to different use purposes.

The cutter head 1-1 is made of ceramic or titanium alloy material; in order to reduce the weight, the interior of the cutter head 1-1 adopts a hollow structure; in order to reduce the friction force, two opposite inclined surfaces 1-1-1 are formed on the upper part of the cutter head 1-1, so that the upper part of the cutter head 1-1 is higher in the middle and lower in two sides, and is in a shape of a rounded-tip roof as shown in fig. 5, thereby reducing the friction force on tissues and the energy output requirement on the transducer.

The bottom of the tong head piece 1-2 is matched with the upper part of the tool bit 1-1, and the length of the contact surface between the tong head piece 1-2 and the tool bit 1-1 can be 5-7 mm according to different purposes;

the bottom surface of the forceps head piece 1-2 forms a central bulge part 1-2-1, two sides of the central bulge part 1-2-1 form side wings 1-2-2 respectively, and the bottom surfaces of the side wings 1-2-2 are engraved with transverse grains.

The invention concentrates the rigid components such as the transducers 1-4, the transducer bridges 1-3 and the fixed bridges 1-8 on the front end of the protective sleeve 2, only occupies a small section of the protective sleeve 2, and most of the protective sleeve 2 is in a soft state, thus being applicable to a soft endoscope.

The energy converter 1-4 is arranged at the front end of the protecting sleeve 2, and the radial space of the protecting sleeve 2 is utilized, so that the radial size of the cutter head 1-1 can be as small as possible, and the ultrasonic knife can be applied to a small-diameter endoscope.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims

1. An ultrasonic blade for a flexible endoscope, characterized by: the ultrasonic scalpel comprises a handle part (3), a protective sleeve (2) and an ultrasonic scalpel head end (1), wherein the front end of the handle part (3) is connected with the tail end of the protective sleeve (2), and the front end of the protective sleeve (2) is connected with the ultrasonic scalpel head end (1);

the ultrasonic cutter head end (1) comprises a cutter head (1-1) and a forceps head piece (1-2); the cutter head (1-1) is fixedly connected with the energy converter (1-4) through a cutter head connecting rod (1-5); the energy converter (1-4) is movably arranged in the energy converter bridge frame (1-3); the energy converter (1-4) can drive the cutter head (1-1) to reciprocate relative to the energy converter bridge (1-3); the energy converter bridge (1-3) is fixedly arranged at the front end of the protective sleeve (2) through a fixed bridge (1-8).

2. An ultrasonic blade for a soft endoscope according to claim 1 and also comprising: the energy converter (1-4) is positioned in a front-end tube cavity of the protective sleeve (2); and/or the transducer bridge frame (1-3) is arranged in the front-end tube cavity of the protective sleeve (2).

3. The ultrasonic blade for a soft endoscope according to claim 1, characterized in that the fixed end of the jaw member (1-2) is connected with the fixed bridge (1-8) through a hinge structure, the distal end of the jaw member (1-2) is fixedly connected with one end of a traction cable (5), the traction cable (5) passes through the sheath tube (2), and the other end is fixedly connected with the handle portion (3).

4. The ultrasonic blade for a soft endoscope according to claim 3, characterized in that the fixed end of the jaw piece (1-2) is sleeved on the hinge axis (1-8-1) of the fixed bridge (1-8), the jaw piece (1-2) can rotate relative to the hinge axis (1-8-1); the articulated shaft (1-8-1) is connected with the plier head piece (1-2) through a torsion spring (1-8-2).

5. The ultrasonic blade for a soft endoscope according to claim 1, characterized in that the transducer bridge (1-3) is connected to the transducers (1-4) by a guide rail.

6. The ultrasonic blade for a soft endoscope according to claim 1, characterized in that the tail of the transducer (1-4) is connected with a cable (6), and the cable (6) is arranged in the protecting sleeve (2) in a penetrating way.

7. An ultrasonic blade for a soft endoscope according to claim 1 and also comprising: the interior of the cutter head (1-1) is hollow.

8. The ultrasonic blade for a soft endoscope according to claim 1 or 7, wherein the upper portion of the blade (1-1) is formed with two opposite slopes (1-1-1) so that the upper portion of the blade (1-1) is higher in the middle and lower in both sides.

9. An ultrasonic blade for a soft endoscope according to claim 8, characterized in that the bottom of the jaw member (1-2) is fitted with the upper portion of the blade (1-1).

10. The ultrasonic blade for a soft endoscope according to claim 9, characterized in that the bottom surface of the jaw piece (1-2) forms a central bulge (1-2-1), the two sides of the central bulge (1-2-1) form side wings (1-2-2), and the bottom surfaces of the side wings (1-2-2) are engraved with transverse lines.