CN211270619U

CN211270619U - Endoscope with a detachable handle

Info

Publication number: CN211270619U
Application number: CN201890000258.3U
Authority: CN
Inventors: 约阿希姆·阿克塞尔·费特
Original assignee: Hoya Corp
Current assignee: Hoya Corp
Priority date: 2017-01-18
Filing date: 2018-01-17
Publication date: 2020-08-18
Anticipated expiration: 2028-01-17
Also published as: DE102017100870A1; WO2018134665A1

Abstract

The utility model relates to an endoscope, it has endoscope head (1) and can be in the axial direction reciprocating motion's of endoscope head (1) motion element (2), the endoscope head has working channel (11) that are used for guiding microtool, the motion element has instrument guide face (20), the instrument that can guide through working channel (11) can be contacted in instrument guide face department to deflect in the transverse direction of endoscope head.

Description

Endoscope with a detachable handle

Technical Field

The present invention relates to an endoscope having an endoscope head and a reciprocating motion element including a tool guide surface. More precisely, the invention relates to an endoscope having an endoscope head with a working channel for guiding a microtool and a reciprocatable movement element arranged at the endoscope head with a tool guiding face. The moving element has a function similar to an albolan lever.

Background

Such albolan levers can be used in endoscopy for examination of, for example, the esophagus or also the duodenum, bile duct, gall bladder, pancreatic duct, pancreas, etc.

Such endoscopes have optical devices (illumination devices and cameras). Furthermore, the endoscope has an albaland lever at the exit of the working channel, which lever effects a targeted deflection of the tool by pivoting, the tool being pushed through the working channel.

After application of the endoscope, the endoscope undergoes processing. The treatment must reliably exclude the spread of all primordia or microorganisms, such as bacteria, viruses, fungi, worms, and also spores. At the time of treatment, the endoscope is first cleaned manually in order to remove organic material or chemical residues without residues. After cleaning, machine sterilization or disinfection is performed. Therefore, it should be avoided: primordia, microbes, or the like that the endoscope contacts during one use of the endoscope are transferred to the patient during the next use.

For example, DE 19627016C 1 discloses an endoscope with an albolan lever. More precisely, the endoscope has a carrier which can be detached from the endoscope, in which carrier an albaland lever is pivotably arranged at an axis supported in the carrier. The pivoting of the albolan lever is done via a pull cord, which is anchored at the albolan lever and guided in the endoscope.

SUMMERY OF THE UTILITY MODEL

The utility model aims at: an endoscope is achieved in which also better avoided are: the primordium that is in contact with the endoscope is transferred to the patient for the next use.

According to the utility model discloses an endoscope has: an endoscope head having a working channel for guiding a microtool; and a moving element which is reciprocatingly movable in an axial direction of the endoscope head, the moving element having a tool guide surface at which a tool which is guidable through the working channel can be contacted so as to be deflected into a transverse direction of the endoscope head.

Therefore, in the present invention, the reciprocating motion element replaces the conventional albolan lever. The movement of the movement element which can be produced by the proximal end of the endoscope is a movement in the longitudinal direction of the endoscope. The conventional pivoting movement of the albolan lever is eliminated.

The movement element can be guided in a channel formed in the longitudinal direction of the endoscope head. In the distal end region of the channel, a seal can be provided at the inner circumference of the channel, which seal tightly surrounds the outer circumference of the moving element from a proximal movement point to a distal movement point of the moving element. Alternatively, the seal may be provided at the outer circumference of the moving element and bear tightly against the inner circumference of the channel from the proximal movement site to the distal movement site of the moving element. The movement can thus be transmitted from the proximal end of the endoscope to the moving element, wherein the transmission of the movement to the moving element is designed such that no primordia or dirt penetrate into the interior of the endoscope due to the seal.

The movement element can have a proximal base section, the cross section of which remains the same shape up to the transition to the tool guide surface, wherein the tool guide surface is at the distal end of the base section, and the proximal base section can be placed at a rod, which is arranged in the channel in a reciprocatable manner. A seal can be provided at the stem. The reciprocating movement of the movement element in the longitudinal direction of the endoscope head can be realized technically simply by means of a rod.

The tool guide surface has a ridge extending in the proximal direction at the lateral outer edge region, and the tool guided at the tool guide surface is bent in the proximal direction by the ridge. Thus, the angle at which the tool is advanced laterally from the endoscope head can be suitably changed. In other words, the tool is moved further in the proximal direction than without the ridge.

In addition to the elevations, the movement element can be designed such that it has no abrupt shape changes on the surface. Alternatively, the bump may be eliminated so that there is no abrupt shape change at all on the surface of the moving element. The moving element can thus be cleaned easily.

The movement element may have an axis extending in the longitudinal direction of the endoscope head, and the movement element may be rotatable about the axis. The moving element can thus be cleaned better from all sides, since the entire circumference of the moving element can be exposed to different angles of the flow direction of the cleaning fluid due to the axial rotation of the moving element.

The cable for actuating the movement element can be a rigid cable. Thus, a pressing movement can be exerted on the moving element from the proximal side of the endoscope.

A pretensioning element may be provided at the moving element for pretensioning the moving element in the distal direction, and the pull cable may be an elastic pull cable. For actuating the moving element, therefore, thin pull or pull cords can be used, which can be guided in a relatively small cable channel in the endoscope.

The pretensioning element can be designed as a spring element, which is arranged on the proximal side of the moving element. Thus, a pulling force in the proximal direction can be exerted by the elastic pull wire on the movement element, and a pressure force in the distal direction can be exerted by the pretensioning element on the movement element.

The cap can be slipped onto the end section of the distal end of the endoscope head at the outer circumference, wherein in the slipped-on state the proximal end of the cap is proximal to the moving element. The cap may have a transverse tool opening on the side of the tool guide face and be closed on the distal side.

The motion element can be disengaged from the endoscope head. Thus, the movement element can be removed after use as a disposable body. The cleaning motion elements may be eliminated. Recontamination caused by the primordia attached at the surface of the moving element is avoided.

The above aspects of the present invention can be combined appropriately.

Drawings

Fig. 1 shows a schematic perspective view of an endoscope head of an endoscope having a reciprocating motion element according to an embodiment of the present invention.

Fig. 2 shows a schematic perspective view of the endoscope head of fig. 1, wherein the moving element has been rotated.

Fig. 3 shows a schematic perspective view of the endoscope head of fig. 1 with a cap fitted over the endoscope head.

Fig. 4 shows a schematic side view of the endoscope head of an embodiment with the moving element in the first proximal region.

Fig. 5 shows a schematic side view of the endoscope head of an embodiment with the moving element in the second distal site.

Fig. 6 shows a schematic perspective view of the endoscope head in the first proximal region of fig. 4.

Fig. 7 shows a schematic perspective view of the endoscope head in the second distal end region of fig. 5.

The present invention is described in detail below according to embodiments with reference to the accompanying drawings.

Detailed Description

Next, an embodiment of the present invention is described with reference to fig. 1 to 7.

The endoscope according to the present invention has an endoscope head 1.

First, the endoscope head 1 is described with reference to the drawings.

The endoscope head 1 according to the invention has a cylindrical housing 15 and also a working channel 11 and a cable channel, not shown, which extend parallel to one another in the longitudinal direction of the endoscope head 1.

The cable channel guides a not shown pulling cable. The pull cord is used to operate the moving element 2 described below. For this purpose, the pull cord is mechanically connected to the rod 29 of the moving element 2. The rod 29 extends in the proximal direction of the moving element 2 and is one-piece with the moving element 2. In the endoscope head 1, the rod 29 is guided in the rod channel 19, which forms an extension of the pull-cord channel in the distal direction.

The working channel 11 guides microtools for examination of, for example, the esophagus or also the duodenum, bile duct, gall bladder, pancreatic duct, pancreas, etc.

The endoscope head 1 has a circumferential groove 13 at its outer circumference, into which a ring-shaped projection of a cap 3 described below is placed.

The endoscope head 1 has an optical device extension 12 on the distal end side (distal end of the circumferential groove 13), on which an illumination device 17 and a camera 18 are provided in a known manner, wherein the optical device extension 12 is shown on the right in fig. 1. The optic extension 12 forms a sidewall section with the camera and the illumination device.

The working channel 11 terminates in a section of the endoscope head 1 which is spaced apart from the distal end and forms there an outlet opening 111 of the distal end of the working channel 11.

At the distal end of the outlet 111 at the distal end of the working channel 11, a movement element 2 is provided, which is reciprocatingly movable relative to the endoscope head 1 in the longitudinal direction of the endoscope head 1. The working channel 1 thus extends in the distal direction towards the moving element 2.

The moving element 2 is described in more detail below.

Fig. 1 shows a perspective view of a moving element 2. The moving element 2 is shown from the side in fig. 4 and 5. For better understanding, fig. 4 and 5 show the endoscope head 1 as a perspective body.

The moving element 2 has a tool guide surface 20 at which microtools that can be guided through the working channel 11 of the endoscope head 1 can be contacted in order to be deflected into the transverse direction of the endoscope head 1 (upwards in fig. 4) so that the microtools can be introduced, for example, into the bile duct. The tool guiding surface 20 is opposite the distal end opening 111 of the working channel 11, see fig. 1. The reciprocating moving element 2 thus has the function of a conventional albaland lever.

On the proximal side, the movement element 2 has a base section 22. The base section 22 extends in the proximal direction in the installed position of the movement element 2.

In the proximal end region of the base section 22, a rod 29 is inserted, which is guided in the rod channel 19. The rod 29 forms the axis of the moving element 2. In the rod channel 19, the rod 29 is rotatable about its axis. The moving element 2 can thus be rotated about its axis, as is shown in fig. 2. Fig. 2 shows the outwardly pivoted region of the movement element 2. In this region the moving element 2 can be cleaned well.

Thus, the moving element 2 can be rotated in the axial direction of the moving element 2. The direction of rotation of the moving element 2 is shown in fig. 2 according to the arrow.

The rod 29 is constructed as an elongated cylindrical element. At the outer circumference of the rod 29, a diameter widening 28 is formed at the middle section of the rod 29. The diameter widening can be formed in the form of a disc 28 which is fixedly sleeved on the outer circumference of the rod 29. The disc 28 follows the rod 29.

The proximal end face of the disk 28 forms a support face for the spring 9 as a pretensioning element, which is arranged at the outer circumference of the rod 29. The spring 9 abuts against a spring seat 14 in a housing 15 of the endoscope head 1.

The spring 9 is in this exemplary embodiment designed as a helical spring. The spring 9 is mounted under pretension between the spring seat 14 and the proximal face of the disc 28. The spring 9 pretensions the moving element 2 in the distal direction.

By pulling the lever 29 in the proximal direction by means of the pull cord, the pretension of the spring 9, which is pretensioned in the distal direction, can be overcome and the moving element 2 can be pulled in the proximal direction.

Fig. 4 shows a state of the moving element 2 pulled in the proximal direction as a first proximal region of the moving element 2. In this state, the springs 9 are compressed together. The rod 29 is pulled in the proximal direction by means of the pull cord.

Fig. 5 shows a state of the movement element 2 in the distal direction as a second distal portion of the movement element 2. The pull cord is not shown in this state.

The spring 9 presses the rod 29 into the distal end region. In the distal end region, the disk 28 of the rod 29 abuts against a stop 191, which is formed in the housing 15 at the outer circumference of the rod channel 19. The rod channel 19 therefore has a diameter widening in the section between the spring seat 14 and the stop 191.

Thus, the moving element 2 can reciprocate in the longitudinal direction of the endoscope head 1. The direction of the reciprocating movement of the moving element 2 can be shown in fig. 1 according to the arrows.

At the distal end of the stop 191, a seal 16 is provided at the rod passage 19. The seal 16 is designed as an annular sealing element and is arranged in the housing 15 in a sealing manner on the outer circumference of the rod 29. The seal 16 is disposed between the stop 191 and the distal outlet of the rod channel 19. In other words, the seal 16 is arranged between the spring 9 and the distal outlet of the rod channel 19.

The movement element 2 can be pulled down in the distal direction by the rod 29. The movement element 2 can be pressed onto the distal end of the rod 29, so that the movement element can be pulled again by the rod 29 with a predetermined force. In this case, a blind bore with a suitable diameter is formed on the proximal end of the base section 22. The distal end of the rod 29 is pressed into the blind bore.

Thus, the moving element 2 can be detached from the endoscope head 1.

The moving element 2 can be manufactured from plastic, for example by an injection molding method or by a 3D printer.

A protective cap 3 is fitted over the distal end section of the endoscope head 1 at the outer circumference of the endoscope head 1.

The protective cap 3 is described below.

The protective cap 3 is configured as a cylinder provided with a bottom. In other words, the protective cap 3 has a cup shape. The cup-shaped shape has a bottom portion and a surrounding side wall, the bottom portion being provided at the distal end side of the protective cap 3. The size of the cup-shaped shape is selected such that the protective cap 3 can be placed onto the outer circumference of the endoscope head 1 such that the distal outlet 111 of the working channel 11 and the area of the moving element 2 are covered. Thus, the optic extension 12 is also covered by the cap 3.

The protective cap 3 has a window 31 which ensures optical access to the illumination means 17 and the camera 18, see fig. 3.

The protective cap 3 is manufactured from plastic, for example by an injection molding method or by a 3D printer.

The window 31 is provided as a side cut-out of the side wall of the protective cap 3. In the case of the protective cap 3 provided at the endoscope head 1, the side cut of the side wall of the protective cap 3 is above the moving element 2. The microtool can be advanced through the window 31. Further, the cap 3 is disposed on the endoscope head 1 so that the illumination device 17 outputs light through the window 31, and the camera 18 captures an image through the window 31.

The protective cap 3 has a distal opening 32. At the distal opening 32 of the cap 3, an annular projection (not shown) is formed on the inner circumferential side. The annular projection forms an engagement means for engaging with a circumferential groove 13 at the endoscope head 1.

The functions of the utility model

The endoscope according to the present invention is used as follows.

New endoscopes or cleaned and disinfected endoscopes are provided. A new cap 3 according to the invention is placed on the end section of the distal end of the endoscope head 1. In this case, the annular projection of the distal opening 32 of the cap 3 engages in the circumferential groove 13 on the endoscope head 1 and locks there.

In a state of being fitted around the endoscope head 1, the illumination device 17 and the camera 18 are exposed through the window 31. The opening 32 of the proximal end of the cap is tightly abutted against the outer circumference of the endoscope head 1 via locking means.

The endoscope can be introduced to the patient for examination or treatment purposes.

When the endoscope is introduced up to a desired place, for example, into the duodenum opposite to the orifice of the bile duct, the area of the orifice of the bile duct can be illuminated and photographed by the illumination device 17 and the camera 18.

At this point, the microtool can be moved through the working channel 11. The microtool may be, for example, a guide wire, a biopsy forceps, a stent system, a catheter system, a nipple incision knife, or the like.

The microtool moves past the outlet opening 111 at the distal end of the working channel 11 and reaches the tool guiding surface 20 of the moving element 2.

At this time, the moving element 2 can reciprocate in order to support further forward movement of the microtool.

For better understanding, fig. 6 and 7 show the endoscope head 1 as a perspective body.

Fig. 6 shows a state of the moving element 2 pulled in the proximal direction as a first proximal region of the moving element 2. In this state, the spring 9 is pressed. The rod 29 is pulled in the proximal direction by a pull cord.

Fig. 7 shows a state of the movement element 2 in the distal direction as a second distal site of the movement element 2. In this state, the pull cord is not operated.

By pulling and releasing the pull cord, the moving element 2 is reciprocated between the distal and proximal locations. Thus, by means of an alternating pulling movement and releasing movement of the pull cord, an alternating movement of the moving element 2 with its tool guide surface 20 towards the proximal side and towards the distal side can be caused. Thereby simplifying the advancement of the microtool.

The utility model has the advantages of

The utility model discloses realize the solution that is used for the endoscope that simple and cost is suitable, wherein protective cap and stay cord are in the space separation for the reciprocating motion of manipulation tool guide face. Conventional albolan levers, due to their geometry, provide undercuts where primordia, etc. will be deposited in use, which will also likely remain at the albolan lever with vigorous cleaning and elimination.

In the present invention, the moving element 2 has a tool guide face 20. The movement element 2 therefore assumes the function of an albolan lever. The movement element 2 can be removed from the rod 29 in the distal direction. The distal end of the rod 29 can be easily cleaned.

The moving element 2 can be removed after use.

The protective cap 3 can likewise be removed after use.

The surface of the optic extension 12 is flat and can be easily cleaned.

In one use of the endoscope, the endoscope is in contact with the primordia, and therefore, the endoscope according to the present invention provides the following possibilities: avoiding the transfer of these primordia etc. to the next patient at the next time of use.

The movement element 2 can be designed as a single-use component and be removed. Alternatively, the moving element 2 can be fed to a cleaning and disinfecting mechanism.

A pull cord channel is sealed in the endoscope head, wherein the pull cord is completely sealed from the environment. The cable channel and the cable seal are watertight. Thus avoiding: the primordium can enter the stay cable channel or can be in contact with the stay cable.

Alternative scheme

The spring 9 is in this exemplary embodiment designed as a helical spring. Instead of the spring 9, any other suitable pretensioning means can be selected. The pretensioning device only has to be able to pretension the moving element 2 in the distal direction.

Instead of a pretensioning device that is pretensioned in the distal direction, a pretensioning device that is pretensioned in the proximal direction can also be used. The pull-cord must then be designed as a sufficiently rigid displacement element which can overcome the pretensioning of the pretensioning device in the proximal direction and can displace the movement element 2 in the distal direction.

In this embodiment, the lever 29 of the moving element 2 can be pulled in the proximal direction by means of a pull cord which can be operated from the proximal side and can be moved in the distal direction by means of a spring. Alternatively, in an endoscope, the rod channel can be guided up to the proximal manipulator side, and the rods are elastic and extend up to the proximal manipulator side. Thus, the cable and the pretensioner can be eliminated. The reciprocating movement of the moving element 2 is then generated directly on the proximal manipulator side of the endoscope by advancing and retracting the proximal end of the elastic rod.

In another alternative, a bulge extending in the proximal direction can be provided at the upper end of the tool guiding surface 20 in fig. 4 and 5, which bulge can bend the microtool moving along the tool guiding surface 20 through the working channel 11 into the proximal direction. The bulge causes: the advanced microtool bends more strongly in the proximal direction.

In this embodiment, a seal 16 is provided at the rod channel 19. I.e. the seal 16 is placed tightly in the housing 15 at the outer circumference of the stem 29 and the stem 29 moves relative to the seal 16. Alternatively, a configuration can be selected in which the seal 16 is formed fixedly on the outer circumference of the rod 29 and is moved by means of the rod 29 relative to the housing, i.e. relative to the rod channel 19. The sealing element 16 should here seal from a proximal movement point of the moving element 2 to a distal movement point.

The utility model can be applied to the duodenoscope. The principles of the present invention may also be applied in ultrasonic endoscopes and to any other type of endoscope.

List of reference numerals

1 endoscope head

2 moving element

3 cap

4 pulling rope

9 spring

11 working channel

12 stay cable channel

13 circumferential groove

14 spring seat

15 casing

16 sealing element

17 Lighting device

18 camera

19-bar channel

20 tool guide surface

21 proximal basal section

22 base section

28 dish

29 bar

31 window

32 distal end opening

111 distal outlet of working channel

End region of the distal end of the 121-cable channel

191 a stop.

Claims

1. An endoscope, characterized in that the endoscope has:

an endoscope head (1) having a working channel (11) for guiding a microtool, and

a moving element (2) which is reciprocally movable in the axial direction of the endoscope head (1), which moving element has a tool guide surface (20) at which a tool which can be guided through the working channel (11) can be contacted in order to be deflected into the transverse direction of the endoscope head, wherein,

the movement element (2) is guided in a channel (19) formed in the longitudinal direction of the endoscope head (1) and

at a distal end region (121) of the channel (19), a seal (16) is provided at an inner circumference of the channel (19), which seal tightly surrounds an outer circumference of the moving element (2) from a proximal movement point to a distal movement point of the moving element (2), or

The seal (16) is arranged on the outer circumference of the moving element (2) and bears tightly against the inner circumference of the channel (19) from a proximal movement point to a distal movement point of the moving element (2).

2. The endoscope of claim 1,

the movement element (2) has a proximal base section (21), the cross section of which remains the same as far as the transition to the tool guide surface (20), wherein the tool guide surface (20) is at the distal end of the base section (21), and

the proximal base section (21) is disposed at a rod (29) which is reciprocatingly disposed in the channel (19).

3. The endoscope of claim 1 or 2,

the tool guide surface (20) has a bulge (25) extending in the proximal direction at the outer lateral edge region, by means of which a tool guided at the tool guide surface (20) is bent in the proximal direction.

4. The endoscope of claim 3,

the movement element (2) has no abrupt shape change on the surface, except for the raised portion (25).

5. The endoscope of claim 1 or 2,

the moving element (2) has an axis extending in the longitudinal direction of the endoscope head, and

the movement element (2) is rotatable about the axis.

6. The endoscope of claim 1 or 2,

the cable (4) for actuating the moving element (2) is a rigid cable.

7. The endoscope of claim 1 or 2,

a pretensioning element (9) is provided on the moving element (2) in order to pretension the moving element (2) in the distal direction, and

the cable (4) for actuating the moving element (2) is an elastic cable.

8. The endoscope of claim 7,

the pretensioning element is designed as a spring element (9) which is arranged on the proximal side of the moving element (2).

9. An endoscope according to claim 1 or 2, characterised in that the endoscope has

A cap (3) that can be slipped onto an end section of the distal end of the endoscope head (1) at the outer circumference, wherein in the slipped-on state a proximal end of the cap (3) is proximal to the moving element (2).

10. The endoscope of claim 9,

the cap (3) has a tool opening laterally of the side of the tool guide surface (20) and is closed on the distal side.

11. The endoscope of claim 1 or 2,

the moving element (2) is detachable from the endoscope head (1).