CN110313980B

CN110313980B - Variable-diameter conveying sleeve and medical instrument set

Info

Publication number: CN110313980B
Application number: CN201910698519.4A
Authority: CN
Inventors: 宋勇; 秦高平; 张昊宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-31
Filing date: 2019-07-31
Publication date: 2023-04-18
Anticipated expiration: 2039-07-31
Also published as: CN110313980A

Abstract

The invention discloses a variable-diameter conveying sleeve and a medical instrument set. Wherein but reducing conveying sleeve pipe includes: the first conveying sheath comprises an elastic connecting piece and wall strips which are arranged along the circumferential direction and are sequentially butted and can support and enclose a tube cavity, and the elastic connecting piece is respectively connected with the wall strips so that the adjacent wall strips are elastically connected; the outer wall of the second conveying sheath pipe is provided with an expansion mechanism; is insertable within the primary delivery sheath in a delivery direction; the expansion mechanism is configured to be capable of protruding towards the direction away from the outer wall of the second conveying sheath tube so that the wall strips move towards the outer side direction of the first conveying sheath tube to partially or completely separate the adjacent wall strips, and at the moment, the elastic connecting piece provides a force for resetting the separated wall strips; the second delivery sheath is configured for passage of a medical device.

Description

Variable-diameter conveying sleeve and medical instrument set

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to a variable-diameter conveying sleeve and a medical instrument set.

Background

The laparoscopic surgery is a newly developed minimally invasive method and is an inevitable trend for the development of the future surgical method. With the rapid advance of industrial manufacturing technology, the fusion of related disciplines lays a firm foundation for the development of new technology and new method, and the more and more skillful operation of doctors makes many of the past open operations replaced by the intracavitary operations, thereby greatly increasing the operation selection opportunities. The traditional method of the retrolaparoendoscopic surgery is to make three small 1 cm incisions on the waist of a patient, insert a tubular working channel called trocar respectively, and carry out all the following operations through the three channels; and then special lengthened surgical instruments are used for completing the same steps as the open surgery under the television monitoring, so that the same surgical effect is achieved. The advantages of laparoscopic surgery after two-hole surgery are very obvious, firstly the trauma is very small, only 2 small holes are needed, the scar is very small, and the method is more remarkable for young people and women loving beauty. Secondly, the operation is a single-knife straight-in entry, the damage to surrounding tissues is reduced to the minimum, and the chance of postoperative adhesion is reduced. Third, the patient had significantly reduced pain from post-operative wounds. Fourthly, the number of hospital stay days is small, some patients can be discharged after 2-3 days, and the patients can completely recover health and put into operation after 7 days, so that the burden cost of the patients is greatly reduced, and the turnover rate of hospital beds is accelerated. Laparoscopic and laparoscopic urinary surgery following a two-port procedure can now be used in urinary surgery treatments such as cystectomy, testicular descent of the cryptorchidism, superior ligation of the spermatic vein, etc. However, in the existing operation process, large-particle stones and large-diameter tissue excision objects are often encountered, and the large-diameter excision objects cannot be taken out at one time due to the fixed diameter of the conveying sheath tube, so that secondary treatment needs to be carried out in the cavity, the operation efficiency is influenced, and secondary pollution is easily caused; or secondary flaring of the incision is needed, so that the pain of a patient is increased, and the minimally invasive surgery is not minimally invasive. Therefore, there is a need to provide a variable diameter delivery cannula solution.

Disclosure of Invention

It is an object of the present invention to provide a new solution for a variable diameter delivery sleeve.

According to a first aspect of the present invention, there is provided a variable diameter delivery cannula comprising:

the first conveying sheath comprises an elastic connecting piece and wall strips which are arranged along the circumferential direction and are sequentially butted and can support and enclose a tube cavity, and the elastic connecting piece is respectively connected with the wall strips so that the adjacent wall strips are elastically connected;

the outer wall of the second conveying sheath pipe is provided with an expansion mechanism; is insertable within the primary delivery sheath in a delivery direction; the expansion mechanism is configured to be capable of protruding towards the direction away from the outer wall of the second conveying sheath tube so that the wall strips move towards the outer side direction of the first conveying sheath tube to partially or completely separate the adjacent wall strips, and at the moment, the elastic connecting piece provides a force for resetting the separated wall strips;

the second delivery sheath is configured for passage of a medical device.

Optionally, the expansion mechanism comprises a first link, a second link, and a pushing portion; the pushing part is arranged at the proximal end of the second conveying sheath and can slide along the axial direction of the second conveying sheath; the first connecting rod is close to the far end of the near end of the second conveying sheath tube, and one end of the first connecting rod is rotatably connected to the outer wall of the second conveying sheath tube; the second connecting rod is positioned between the first connecting rod and the pushing part, and two ends of the second connecting rod are respectively in rotating connection with the first connecting rod and the pushing part; the number of the first connecting rods and the number of the second connecting rods correspond to the number of the wall strips one to one.

Optionally, the wall strips on two adjacent sides of any one of the wall strips are symmetrically arranged, and the first connecting rod and the second connecting rod are arranged corresponding to the center line of the wall strip.

Optionally, the wall strip includes a first wall strip and a second wall strip, the first wall strip and the second wall strip are disposed adjacent to each other, a butt joint portion of the first wall strip and the second wall strip is provided with protruding portions in a staggered fit, and the first wall strip and the second wall strip are symmetrically disposed.

Optionally, the resilient connector is provided at the interface between the adjacent wall strips.

Optionally, the resilient connector seals the interface between the adjacent wall strips.

Optionally, the resilient connection is a resilient sealing layer covering the inside or/and outside of the first delivery sheath.

Optionally, the material of which the wall strip or/and the second delivery sheath is made comprises a medical grade plastic.

Optionally, the material of the elastic connecting piece comprises medical silica gel and rubber.

According to another aspect of the invention, there is also provided a medical device kit comprising a variable diameter delivery cannula as described above and a medical device capable of being passed through the second delivery sheath.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

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

Fig. 1 is a schematic view of an initial state structure of a first delivery sheath in some embodiments of the invention.

Fig. 2 is a schematic cross-sectional view of a second delivery sheath in some embodiments of the invention.

Fig. 3 is a schematic exterior view of a second delivery sheath according to some embodiments of the invention.

Fig. 4 is a schematic view of the bulging state of the expanding mechanism according to some embodiments of the invention.

Fig. 5 is a structural schematic view of the expanded state of the first delivery sheath in some embodiments of the invention.

Fig. 6 is a schematic view of a wall strip structure of a first delivery sheath in accordance with further embodiments of the present invention.

Fig. 7 is a schematic view of the wall structure of the first delivery sheath according to still other embodiments of the invention.

Fig. 8 is a schematic view of the wall structure of a first delivery sheath in accordance with still further embodiments of the invention.

Fig. 9 is a schematic view of the external configuration of a first delivery sheath according to some embodiments of the invention.

Fig. 10 is a partially enlarged schematic view of fig. 9.

Fig. 11 is a schematic diagram of a first state of operation in some embodiments of the invention.

Fig. 12 is a schematic diagram of a second state of operation in some embodiments of the invention.

Fig. 13 is a third state diagram operational in some embodiments of the invention.

Fig. 14 is a fourth state diagram operational in some embodiments of the inventions.

Fig. 15 is a fifth state diagram operational in some embodiments of the invention.

Fig. 16 is a sixth state diagram operational in some embodiments of the inventions.

In the figure: the medical device comprises a first conveying sheath pipe 1, a first wall strip 11, a second wall strip 12, a bulge part 13, an elastic connecting piece 14, a limiting part 15, a second conveying sheath pipe 2, an expansion mechanism 21, a first connecting rod 22, a second connecting rod 23, a pushing part 24, anti-skidding threads 25, skin 3, a medical device 4 and a taken-out object 5.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

According to one aspect of the present invention, the present invention provides a variable diameter delivery cannula, referring to fig. 1 to 5, comprising a first delivery sheath 1 and a second delivery sheath 2. The first delivery sheath 1 and the second delivery sheath 2 are generally mating cylindrical sleeves.

The first delivery sheath 1 comprises a resilient connection 14 and a plurality of wall strips. The wall strips are arranged along the circumferential direction, are sequentially butted and can support and enclose the synthetic tube cavity. When the plurality of wall strips are sequentially butted, the minimum inner diameter of the first conveying sheath pipe 1 is the minimum inner diameter; when the adjacent wall bars are separated and moved in the outer direction of the first transporting sheath 1, the inner diameter of the first transporting sheath 1 can be increased and changed.

The elastic connecting pieces 14 are respectively connected with the wall strips, so that the adjacent wall strips are elastically connected, when the inner diameter of the first conveying sheath pipe 1 is changed by an external force, the elastic connecting pieces 14 can provide a force for resetting the separated wall strips, and after the external force disappears, the wall strips can automatically reset. The elastic connection member 14 enables the first delivery sheath 1 to maintain a minimum inner diameter state in the absence of an external force, facilitating the maintenance of its original shape.

The second delivery sheath 2 is insertable into the first delivery sheath 1 from the proximal end of the first delivery sheath 1 in the delivery direction. An expansion mechanism 21 is arranged on the outer wall of the second conveying sheath 2. The expanding mechanism 21 can be protruded towards the direction of the outer wall far away from the second conveying sheath 2 to abut against the wall strip to provide external force, so that the wall strip moves towards the outer side direction of the first conveying sheath 1, and the adjacent wall strips are partially or completely separated, thereby changing the inner diameter of the first conveying sheath 1.

The second delivery sheath 2 is intended for the passage of a medical instrument 4 such that the medical instrument 4 can be brought into an operative position through the first and

second delivery sheaths

1, 2. Referring to the operating conditions shown in fig. 11 to 16, the medical instrument 4 shown may be a stone basket and the extraction 5 may be a stone. When the object carried when the medical instrument 4 is pulled out is larger than the minimum inner diameter of the first conveying sheath 1, the medical staff can change the outer diameter of the first conveying sheath 1 through the expansion mechanism 21 to expand the first conveying sheath 1 outwards, a channel with larger space is provided, when the far end of the medical instrument 4 and the far end of the second conveying sheath 2 are close to each other to enable the object to be blocked, the first conveying sheath 1 is fixed, the second conveying sheath 2 and the medical instrument 4 are synchronously removed outwards, the object larger than the minimum inner diameter of the first conveying sheath 1 can be taken out, and the technical staff in the field can take out the object with larger diameter in the operation process. For example, the utility model is applied to the minimally invasive surgery of the abdominal cavity of the human body, the surgery of the removed large-diameter calculus, the large-block tissue excision and the like. The first conveying sheath 1 can be fixed by a manual assisting fixing mode. Referring to fig. 14 or fig. 15, the operator may also pull out the first transporting sheath 1 together when observing the passage of the taken-out object 5 through the incision in the skin 3, and the present invention is not limited thereto, and fig. 11 to fig. 16 are only schematic views of various states in the operation of the present invention, and do not limit the necessary state in the operation in the use of the present invention.

The invention can expand the incision of the skin 3 in a short time by using the elasticity of the tissue of the skin 3 of the human body through the first variable-diameter conveying sheath tube 1, thereby completing the operation steps. Compared with the case of not using a cannula, the diameter of the extraction object 5 is too large, and the hard pulling can be prevented from causing secondary tearing injury to the incision of the skin 3. Compared with the case of using a cannula with a fixed diameter, the invention can take out an object with a larger diameter at one time on the premise of not causing tearing injury to the incision of the skin 3, thereby improving the operation efficiency.

In some embodiments, referring to fig. 2 to 5, the expansion mechanism 21 includes a first link 22, a second link 23, and a pushing part 24. The pushing portion 24 is provided at the proximal end of the second transporting sheath 2 and can slide along the axial direction of the second transporting sheath 2, facilitating manual operation. The invention can better feel the expansion limit of the incision of the skin 3 through the manual perception of the pushing part 24, thereby facilitating the medical personnel to judge the size range of the object which can be taken out. The first link 22 is close to the distal end of the proximal end of the second transporting sheath 2 and one end of the first link 22 is rotatably connected to the outer wall of the second transporting sheath 2. The second connecting rod 23 is located between the first connecting rod 22 and the pushing part 24, and two ends of the second connecting rod 23 are respectively connected with the first connecting rod 22 and the pushing part 24 in a rotating manner, so that when the pushing part 24 is pushed towards the distal direction of the second conveying sheath tube 2, the rotating connection part of the first connecting rod 22 and the second connecting rod 23 can protrude outwards, and the diameter of the first conveying sheath tube 1 can be expanded; then, when the pushing portion 24 retreats in the proximal direction of the second transporting sheath 2, the diameter of the first transporting sheath 1 can be restored by the elastic connecting member 14.

In the state where the distal end of the first delivery sheath 1 is in the expandable maximum diameter as shown in fig. 12, it is understood by those skilled in the art that if the diameter of the taken-out material 5 is larger than the maximum diameter, the taken-out material 5 cannot be taken out by the present invention, and the operator can take out by other operation means existing in the related art.

The number of the first connecting rods 22 and the second connecting rods 23 respectively corresponds to the number of the wall strips one by one, so that external force can act on each wall strip simultaneously when the wall strip fixing device is used. Further, the plurality of first links 22 and the plurality of second links 23 are also arranged in the circumferential direction in order.

In some embodiments, the wall strips on two adjacent sides of any one of the wall strips are symmetrically arranged, and the first connecting rod 22 and the second connecting rod 23 are arranged corresponding to the center line of the wall strip. So that the external force is more uniform.

In some embodiments, referring to fig. 1 and 5, the wall strips of the first delivery sheath 1 may be 4 or more wall strips uniformly arranged so that the diameter expansion of the first delivery sheath 1 is a uniform expansion, and the force acting on the incision of the skin 3 is dispersed, thereby making it possible to sufficiently utilize the elasticity of the skin 3 to prevent or reduce the tear from being caused to the incision of the skin 3.

In some embodiments, referring to fig. 3, the pushing part 24 is provided with anti-slip lines on the outer part to increase friction force when pushing and maintain its stability.

In some embodiments, the outer wall of the second delivery sheath 2 may be provided with an inverted-tooth-shaped backstop structure at a position corresponding to the pushing portion 24, so that an operator does not need to use force to maintain the state of the expansion mechanism 21 during the outward withdrawing process, and the operation strength of the operator is reduced.

In some embodiments, referring to fig. 6-8, the wall strip may include a first wall strip 11 and a second wall strip 12. The first wall strips 11 and the second wall strips 12 are arranged adjacently, and the butt joint parts of the first wall strips 11 and the second wall strips 12 are provided with the protruding parts 13 which are matched in a staggered mode, so that the butt joint area between the first wall strips 11 and the second wall strips 12 can be increased, and the structural stability of the wall structure is improved. Further, the first wall bar 11 and the second wall bar 12 are symmetrically disposed. Of course, in some other embodiments, as shown in fig. 1 and 5, the projection 13 may not be provided, and the structural stability may be achieved by matching the interface angle.

In some embodiments, referring to fig. 9 and 10, a stopper 15 may be provided on the exterior of the wall strip for cooperatively holding the initial state of the first delivery sheath 1. The limiting portion 15 may be a long strip, and two ends of the limiting portion extend to the outside of the adjacent wall strip, so as to prevent the wall strip from collapsing to the inner side direction of the first conveying sheath 1 under extreme conditions, so that the first conveying sheath 1 cannot maintain the shape. The structure of the first conveying sheath 1 can be stabilized better by the limiting part 15. Further, the stopper portion 15 may be provided at a position not extending into the abdominal cavity when in use.

In some embodiments, referring to fig. 5, the resilient connector 14 may be provided at the interface between the adjacent wall strips, with the connection being made only at the interface.

In some embodiments, said elastic connection 14 seals the interface between said adjacent wall strips, enabling a relative closure of the first delivery sheath 1, preventing foreign bodies from entering the body through the gap.

In some embodiments, referring to fig. 7 and 8, the elastic connection 14 is an elastic sealing layer covering the inside or/and outside of the first delivery sheath 1 to form a complete sheath layer, ensuring the integrity of the present invention.

In some embodiments, the material of which the wall strip or/and the second delivery sheath 2 is made comprises a material of medical grade plastic or metal or the like having sufficient rigidity to fulfill its function of structural support. Furthermore, the selected material can also allow the material to generate certain bending deformation, so that the invention can only generate local deformation when in use.

In some embodiments, the separation of the adjacent wall strips may be a local separation, changing the local inner diameter of the first delivery sheath 1, for example, so that the proximal and distal inner diameters of the first delivery sheath 1 are different, forming a trapezoidal or trumpet-shaped structure for practical operation. In other embodiments, there may be simultaneous equidistant separations, and the invention is not limited in this regard.

In some embodiments, the material of the elastic connection element 14 includes medical silicone rubber and rubber, which can be applied in a surgical environment and can provide sufficient elastic force, but the invention is not limited thereto.

According to another aspect of the invention, there is also provided a medical device kit, in some embodiments comprising a variable diameter delivery cannula as described above and a medical device 4 capable of being passed through said second delivery sheath 2.

In some embodiments, the medical device 4 may be a medical lithotomy device, laparoscopic forceps, or the like, medical device 4 capable of being delivered through a sheath.

Although some specific embodiments of the present invention have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A variable diameter delivery cannula, comprising:

the first conveying sheath comprises an elastic connecting piece and wall strips which are sequentially butted along the circumferential direction and can support and enclose a tube cavity, and the elastic connecting piece is respectively connected with the wall strips so that the adjacent wall strips are elastically connected;

the second delivery sheath is configured for passage of a medical instrument;

the elastic connecting piece seals the butt joint between the adjacent wall strips, is an elastic sealing layer and covers the inner side or/and the outer side of the first conveying sheath;

the expansion mechanism comprises a first connecting rod, a second connecting rod and a pushing part; the pushing part is arranged at the proximal end of the second conveying sheath and can slide along the axial direction of the second conveying sheath; the first connecting rod is close to the far end of the near end of the second conveying sheath tube, and one end of the first connecting rod is rotatably connected to the outer wall of the second conveying sheath tube; the second connecting rod is positioned between the first connecting rod and the pushing part, and two ends of the second connecting rod are respectively in rotating connection with the first connecting rod and the pushing part; the number of the first connecting rods and the number of the second connecting rods are in one-to-one correspondence with the number of the wall strips;

the wall strips on two adjacent sides of any one of the wall strips are symmetrically arranged, and the first connecting rod and the second connecting rod are arranged corresponding to the central line of the wall strip.

2. The variable diameter delivery cannula according to claim 1, wherein the wall strips include a first wall strip and a second wall strip, the first wall strip and the second wall strip are adjacently disposed, the junctions of the first wall strip and the second wall strip are provided with protrusions which are in staggered fit, and the first wall strip and the second wall strip are symmetrically disposed.

3. The variable diameter delivery cannula of claim 1, wherein the material from which the wall strip or/and the second delivery sheath is made comprises a medical grade plastic.

4. The variable diameter delivery cannula of claim 1, wherein the material from which the resilient coupling is made comprises silicone rubber, medical grade.

5. A medical device kit comprising a variable diameter delivery sleeve according to any one of claims 1-4 and a medical device capable of being passed through said second delivery sheath.