CN212521709U

CN212521709U - Endoscope with a detachable handle

Info

Publication number: CN212521709U
Application number: CN201890000475.2U
Authority: CN
Inventors: 托马斯·菲巴赫
Original assignee: Hoya Corp
Current assignee: Hoya Corp
Priority date: 2017-02-24
Filing date: 2018-02-16
Publication date: 2021-02-12
Anticipated expiration: 2028-02-16
Also published as: DE102017103817A1; WO2018154375A1

Abstract

The utility model relates to an endoscope, this endoscope has: an endoscope head (1) having a working channel (11) for guiding a microtool; and a pivoting rod (2) movably arranged at the endoscope head (1), the pivoting rod being capable of pivoting the microtool advanced through the working channel (11). The pivot rod (2) has at least one camera (18) and a distal working channel outlet (111).

Description

Endoscope with a detachable handle

Technical Field

The utility model relates to an endoscope. More specifically, the present invention relates to an endoscope having: an endoscope head having a working channel for guiding a microtool; and a pivoting rod movably disposed at the endoscope head. The pivot rod is capable of pivoting a microtool advanced through the working channel.

Background

For example, the albalan rod (albaranhebel) disclosed by the prior art is a pivot rod of this type.

For example, the albolan rod can be used in a duodenoscope, i.e. an endoscope for examining, for example, the esophagus or duodenum, common bile duct, gall bladder, pancreatic duct, pancreas, etc. In a duodenoscope, an albolan rod is provided at the working channel outlet, which enables the targeted pivoting of a tool moving through the working channel by pivoting.

It is possible to reach the duodenum from a duodenoscope through the esophagus, stomach, and gastric outlet.

SUMMERY OF THE UTILITY MODEL

It is an object of the present invention to provide an improved and more versatile endoscope having a pivot rod that enables pivoting of a microtool advanced through a working channel.

This object is achieved by the endoscope of the present invention.

In the present invention, an endoscope includes: an endoscope head having a working channel for guiding a microtool; and a pivoting rod movably disposed at the endoscope head, the pivoting rod being capable of pivoting the microtool advanced through the working channel. The pivot rod has at least one camera and a distal working channel exit.

In such endoscopes, the camera and distal working channel exit are able to pivot together. Thus, the microtool advancing through the working channel is always in the field of view of the camera.

The endoscope head can be arranged distally from the curved section. The pivot lever therefore offers additional pivoting possibilities with respect to the curved section.

The pivot lever can have a lighting device. Thus, the illumination device can always pivot with the camera and the distal working channel exit. This allows an optimal illumination of the working area of the microtool recorded by the camera.

Alternatively, the endoscope head can have an endoscope head body at which the pivot rod is pivotably supported and which has an illumination device. The illumination device can be arranged separately from the camera and the distal working channel outlet, whereby the pivot lever can be designed smaller.

The pivot rod is pivotable to a first lateral side, wherein the camera and the distal working channel exit point in a first lateral direction. In addition, the pivot rod is pivotable to a second lateral side opposite the first lateral side, wherein the camera and the distal working channel exit point in a second lateral direction.

The pivot lever is pivotable towards the distal side, wherein the camera and the distal working channel outlet point in the distal direction. The introduction of the endoscope can be assisted in this case, since the distal region into which the endoscope is advanced becomes visible.

A hinge structure can be provided at the endoscope head, about which the pivot rod can pivot. Such a hinge structure allows the pivot lever to pivot in a small space.

The articulation structure can have a cable pulley around which a pull cable that can be operated from the proximal end of the endoscope is looped. Such a hinge structure requires very little space and also allows pivoting of the pivot lever.

The pivoting rod can have a working section at which at least the camera and the distal working channel outlet are arranged, wherein the endoscopic head is surrounded by a sheath between the working section of the pivoting rod and the proximal section of the endoscopic head. The pivot region of the pivot rod is protected by a sheath. Bacteria or contaminants do not penetrate into the pivot region of the rotating rod. The sheath can be sealed waterproof.

The sheath can be elastic.

The endoscope head does not have an albolan rod. The task of albolan rod is performed by a rotating rod.

The endoscope can be a rigid endoscope, wherein the endoscope tube is located at the proximal section of the endoscope head in the proximal direction.

The endoscope can be a flexible endoscope, wherein the bending section is located at a proximal section of the endoscope head in the proximal direction, the bending section being controllable from a proximal side of the endoscope.

In the endoscope head, a clamping element is arranged, which exerts a clamping action on the working channel at the lateral end position of the pivoting rod in order to clamp the microtool advanced in the working channel. Such a clamping element can be a projection in the endoscope head which presses the working channel at the transverse end position of the pivoting rod. Such a clamping element can also be a setting fold in the outer circumferential region of the working channel, which is moved in the working channel in a targeted manner inward in the transverse end position of the pivot lever. Thereby, the advancing microtool can be gripped by the projections or the set folds. This improves the force transmission when inserting the microtool, for example, into the bile duct.

Furthermore, the utility model provides a: the pivot lever has a pivot shaft having a cable pulley, and the pivot lever pivots integrally with the cable pulley, on which a pull rope operable by an operation unit of the endoscope is applied.

The endoscope can be a duodenoscope, a colonoscope, a gastroscope, or a bronchoscope. The endoscope can also be any other endoscope.

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

Drawings

Fig. 1 shows a schematic perspective view of a distal section of an endoscope of a first embodiment of the present invention, with the pivot rod in a neutral position, with the sheath removed.

Fig. 2 shows a schematic perspective view of the endoscope of fig. 1 with a sheath.

Fig. 3 shows a schematic perspective view of the distal end section of the endoscope of the first embodiment with the pivot rod in a pivoted to first side position with the sheath removed.

Fig. 4 shows a schematic perspective view of the endoscope in the position of fig. 3 with the sheath.

Fig. 5 shows a schematic perspective view of the distal end section of the endoscope of the first embodiment with the pivot rod in a pivoted to the second side position with the sheath removed.

Fig. 6 shows a schematic perspective view of the endoscope in the position of fig. 5 with the sheath.

Detailed Description

Hereinafter, the present invention is described in detail by way of embodiments and with reference to the accompanying drawings.

First embodiment

Hereinafter, a first embodiment of the present invention will be described with reference to fig. 1 to 6.

Fig. 1 shows a schematic perspective view of a distal end section of an endoscope of a first embodiment of the present invention. The endoscope has an elongated endoscope head 1. The longitudinal direction of the endoscope head 1 extends in the extending direction or the axial direction of the endoscope.

Accordingly, the endoscope head 1 is a part of the endoscope according to the present invention. The endoscope can be designed as a flexible endoscope for the gastrointestinal tract. The endoscope has an operating section and an insertion section. The operating section is located on the proximal side and the insertion section is located on the distal side of the endoscope. The operating section (not shown in the figures) has an operating lever (e.g. a telelever or a simple lever) for operating the pivoting lever 2 described in detail below, a working channel access, and an adjusting knob for bending the bending section (bent section) of the endoscope. The operation portion is connected with the video processor, the light source device, the display device and the like.

The insertion section is an elongated tubular element. The proximal end of the insertion section is connected to the manipulation portion. The insertion section has a flexible section and a curved section in this order as viewed from the operating section. The flexible section is elastic. The bent section pivots at an angle according to the operation of the adjustment knob. A rigid end piece section is formed at the distal end of the curved section. The rigid end piece section forms a so-called endoscope head 1.

The endoscope head 1 according to the present invention of fig. 1 has a pivoting rod 2 and an endoscope head body 3.

The endoscope head 3 has a ring member 4 on its proximal end side. The ring element 4 forms the proximal end of the endoscope head 1. The ring element 4 has a ring section extending in the proximal direction with an outer circumferential surface as a distal end for the fastening surface 41 of the hose section of the bending section. The ring element 4 also has a ring section extending in the distal direction, which ring section has as a proximal end an outer circumferential surface as described below for the fastening surface 42 of the sheath 6. The sheath 6 is shown in figure 2 but omitted from figure 1 for clarity.

Through the ring element 4, various channels extend which operatively connect a proximal section of the endoscope with a distal section of the endoscope head 1. In particular, the two pull-cord channels 50, the working channel element 110 provided as a hose, the water tube 140 and the air hose 150 extend through the ring element 4 in the longitudinal direction of the endoscope head 1. Other hoses and passages can extend through the ring element 4. Cables for supplying power to the lighting device 17, the camera 18, the nozzle 19, and the like described below are also led through the ring member 4, but are not shown here.

The endoscope head body 3 is connected on its proximal end side with an unillustrated operation unit by an unillustrated cable or wirelessly. The operation unit is used to control the endoscope head 1.

The pull cord 5 extends through two pull cord channels 50 for operating the pivot lever 2 described below.

The endoscope head 3 has a working channel 11 formed inside the working channel member 110 and a pull-string channel 50 extending in the longitudinal direction of the endoscope head 3. The working channel 11 guides a microtool for examining, for example, the esophagus or duodenum, common bile duct, gall bladder, pancreatic duct, pancreas, etc. The working channel element 110 has a distal working channel outlet 111 on the distal side as a distal opening. In fig. 1, a working channel section 112 at the entrance of the endoscope head is shown at the ring element 4.

The endoscope head 3 is equipped at its distal end side with a through-hole or blind hole which is arranged perpendicularly to the longitudinal direction of the endoscope head 1 and is equipped with at least one bearing at which the pivot shaft 21 is rotatably supported. The pivot axis 21 thus extends perpendicularly to the longitudinal direction of the endoscope head 1.

At the pivot shaft 21, a rope pulley 22 is arranged, which is fixedly or integrally connected with the pivot shaft 21. Thus, when the pivot shaft 21 rotates, the rope pulley 22 also rotates.

The rope pulley 22 has a groove section at its outer circumference, in which the pulling rope 5 is arranged. In particular, the pull cord 5 extends from the proximal end side (operation unit) of the endoscope to the cord pulley, is looped over the cord pulley, and extends back to the proximal end side (operation unit) of the endoscope. Hereinafter, a section of the pull cord 5 extending from the proximal end side (operation unit) of the endoscope to the cord pulley 22 is referred to as a first pull cord section 5A, and a section of the pull cord 5 extending from the cord pulley 22 to the proximal end side (operation unit) of the endoscope is referred to as a second pull cord section 5B. In fig. 1, a first pull cord section 5A passes through the upper pull cord channel 50 and a second pull cord section 5B passes through the lower pull cord channel 50. In the region of the rope pulley 22, the cable 5 has a fixed cable section 5C fixed to the outer circumference of the rope pulley 22. The pull rope section 5C can be clamped, glued or otherwise fixed at the outer circumference of the rope pulley 22.

Thus, the cord section 5C is arranged between the first and

second cord sections

5A, 5B.

Integrally connected to the rope pulley 22 is a pivot lever 2. Thus, the pivot lever 2 pivots integrally with the pivot shaft 21.

The pivoting rod 2 forms the distal end of the endoscope head 1. The pivot lever 2 has a flat disc. The outer surface of the flat disc is defined as the working area. At which the distal working channel exit 111 of the working channel 11 and the camera 18 are arranged. Thus, the working channel element 110 and the camera cable extend to the working area of the pivot rod 2. At the working area of the pivot rod 2, the working channel 11 forms a distal working channel outlet 111. By mounting on the working area, the distal working channel outlet 111 of the working channel 11 and the camera 18 thus form a co-pivotable assembly.

Thus, by pivoting of the pivot lever 2, the camera 18 and the distal working channel outlet 111 of the working channel 11 are pivoted, whereby the lateral orientation of a microtool (e.g. a guide wire or biopsy forceps) guided in the working channel 11 can be changed. In other words, the pivoting lever 2 changes the orientation angle of the microtool, which is moved parallel to the axis of the endoscope head 1 through the working channel 11. The orientation of the microtool is then changed to the transverse direction by pivoting the rod 2 and the microtool is then laterally extended from the endoscope head 1 for insertion into the common bile duct. The miniature tool, which is advanced laterally, can be observed and recorded by means of the camera 18.

Furthermore, a lighting device 17, which is shown as an example in fig. 1 as three LEDs, is provided at the working area of the pivot lever 2.

Furthermore, a water injection hole 16 and an air/water nozzle 19 are provided at the working area of the pivot lever 2. An air/water nozzle 19 can be used to clean the lens of the camera 18.

As shown in fig. 2, the sheath 6 is provided on the endoscope head 1. The sheath 6 extends from the working range of the pivot rod 2 to a fastening surface 42 on the ring element 4. More specifically, the sheath 6 is fixed by gluing or welding on the outer edge of the flat disc forming the working area of the pivot rod 2 and on the fastening surface 42.

The sheath 6 surrounds the endoscope head 1 except for the working area of the pivoting rod 2, where the distal working channel outlet 111 of the working channel 11 and the camera 18 are arranged.

The sheath 6 is formed of an elastic material. For example, the sheath 6 can be formed of rubber or silicone.

The sheath 6 serves for an airtight sealing at the endoscope head 1. The sheath can be easily cleaned.

The sheath 6 has fold regions 61 and 62 at a region in which it can be bent or folded particularly strongly during pivoting of the pivot lever 2. The sheath 6 can be reinforced at the fold areas 61 and 62.

The functions of the utility model

The pivoting rod 2 is pivotable relative to the endoscope head body 3 of the endoscope head 1.

Fig. 1 and 2 show a rest or neutral position. The rest position is a straight position of the pivot lever 2. In the rest position, neither the first and second

guy wire sections

5A, 5B are pulled. Therefore, the pivot lever 2 does not pivot. The rest position can be used for introducing an endoscope. In the rest position, the pivot rod 2 and the entire distal end region of the endoscope head 1 form a minimum cross-sectional area and therefore a minimum resistance during insertion of the endoscope.

For example, when the endoscope is inserted, the first pull cord section 5A is pulled. Thereby, the pivot lever 2 is pivoted to the first lateral side, as shown in fig. 3 and 4. The pivot lever 2 is thus in an upwardly inclined position. The working area of the pivot lever 2 and the distal working channel outlet 111 of the working channel 11 and the camera 18 and the illumination means 17 are directed sideways. More specifically, the distal working channel exit 111 of the working channel 11 and the camera 18 and the illumination device 17 are directed in a direction forming an acute angle with the longitudinal extension of the endoscope head 1.

When the endoscope head 1 is placed in the duodenum, the common bile duct can be well illuminated, observed, and recorded at this position, and the microtool can be well inserted into the common bile duct.

When pulling the second pull cord section 5B, the pivot lever 2 pivots to the second lateral side, as shown in fig. 5 and 6. The pivot lever 2 is thus in a downwardly inclined position. The working range of the pivot lever 2 and the distal working channel outlet 111 of the working channel 11 and the camera 18 and the illumination device 17 point in the distal direction.

When pulling the second pull cord section 5B further, the pivot lever 2 is pivoted further to the second lateral side.

The pivoting angle or the pivoting angle of the pivoting lever 2 can be selected such that the working area of the pivoting lever 2 can be pivoted by more than 90 ° in both lateral directions. Preferably, the working area of the pivot lever 2 is pivotable in both lateral directions over 120 ° (over the lateral position 30 °).

The advantages of the utility model

Duodenoscopes typically have transverse (lateral) optics (illumination and camera). Optics can make insertion and advancement through the esophagus more difficult because "forward" viewing is not easy. There is sufficient space in the stomach or duodenum to bend the distal end of the duodenoscope by approximately 90 ° to allow for a forward view.

In the present invention, the endoscope can occupy the position of the pivoting lever 2, which facilitates "forward" viewing.

As shown in fig. 3 and 4, an upwardly directed position, which is particularly advantageous according to the invention, is achieved for the function as a duodenoscope. In ERCP (endoscopic retrograde cholangiopancreatography) applications, the instrument must be inserted into the bile/pancreatic duct, which extends slightly backwards. Here, a slightly rearward position of the working channel outlet and the camera is very advantageous. This position optimally aligns the camera image with the instrument.

In a conventional duodenoscope, an albolan rod pivots a tool (e.g., a guide wire or biopsy forceps) extending from the working channel laterally/rearwardly. It has not hitherto been possible to ensure that the instrument is well visible in the camera image.

With the aid of the invention, additional bending possibilities are created for the known bending sections. Furthermore, the additional bending possibility is located on the distal side in front of the bending section.

By application as a pivot lever, this additional bending possibility allows pivoting in a very small space.

The purpose of the additional bending possibilities is primarily not the control of the endoscope during insertion into the body, but rather the change of the field of view and the working position relative to the longitudinal extent of the endoscope. This can basically be achieved by the bending section, but not in such a small space.

In the present invention, the traditional albolan rod is replaced by a pivoting rod 2 according to the present invention, the purpose being transverse to the counter-bending of the instrument. The camera and the illumination position remain connected to the working channel outlet direction, since the distal working channel outlet 111 of the working channel 11 and the camera 18 thus form a common pivotable component. In a conventional albolan rod, the position of the instrument changes relative to the viewing direction.

Other alternatives

In one embodiment, the endoscope head 1 has two pull cord channels 50. Alternatively, only one pull-cord channel 50 can be provided, and a configuration can be selected in which the pull cord effects pivoting of the pivot lever 2 via a lever mechanism and possibly a conversion mechanism.

In one embodiment, the rope segment 5C is fixed at the outer circumference of the rope pulley 22. Alternatively, the cable section 5C can be guided taut on the outer circumference of the cable pulley 22.

In one embodiment, the cable pulley 22 forms a structure that enables the pivot rod 2 to pivot on the endoscope head 1. The present invention is not limited thereto. Another configuration that allows the pivoting rod 2 to rotate on the endoscope head 1 can be selected. Such a structure can, for example, comprise a lever arm on which the pull cord is applied, so that the pull cord is used to effect the pivoting action of the pivoting lever 2 at the endoscope head 1. Furthermore, a combination of a gear and a rack can be used to pivot the pivoting rod 2 at the endoscope head 1.

In one embodiment, the working area of the pivot rod 2 is formed as a flat disc. The working area of the pivot lever 2 can have any shape. The working area of the pivot lever 2 need not be flat, it can be bent outwards.

In this embodiment, in the rest position (non-pivoted position in fig. 1 and 2), the distal working channel outlet 111 of the working channel 11 and the camera 18 are oriented laterally. Alternatively, in the rest position, the distal working channel outlet 111 of the working channel 11 and the camera 18 can be directed forward, i.e. in the distal direction. In this alternative, the rest position can be used particularly advantageously for the introduction of an endoscope, since the distal region can be illuminated and observed in front of the endoscope.

In one embodiment, the lighting device 17 is arranged at the working area of the pivot lever 2. Alternatively, the illumination device 17 can be arranged on the proximal side of the pivot lever 2, so that the illumination device does not pivot together with the pivot lever. For example, the lighting device 17 can be arranged at the ring element 4.

In one alternative, a clamping element can be arranged in the endoscopic head, which clamping element exerts a clamping action on the working channel 11 in the lateral end position of the pivoting rod 2 to clamp the microtool advanced in the working channel 11. Such a clamping element can be a built-in projection in the endoscope head which presses on the working channel element 110 at the lateral end position of the pivoting rod 2. For example, such a projection can extend distally from the ring element 4 to the outer circumferential side of the working channel element 110, so that the projection in fig. 1 does not press the working channel element 110, but presses the working channel element 110 inwards in the position in fig. 3. Such a clamping element can also be a setting fold in the outer circumferential side region of the working channel 11, which in particular advances inward, i.e. contracts inward, in the transverse end position of the pivot lever 2 in the working channel 11. The inwardly folded material of the set folds narrows the internal cross-section of the working channel 11, thereby exerting a clamping or pressing action on the advancing microtool. Thereby, the working channel can be twisted or pressed at the transverse end position by suitable elements. The resilient, resilient working channel tube is able to repeatedly perform this clamping movement without having to give up the hermetic seal required by the system at any time. Thereby, the advancing microtool can be clamped by the projection or the setting fold. This provides for better force transmission when, for example, microtools are inserted into the common bile duct.

The utility model discloses can also be applied to rigid endoscope. Instead of an endoscope tube with a curved section, an endoscope rod (endoscope tube) is arranged at the proximal end side of the endoscope head 1 according to the invention.

The alternatives set forth can be combined as appropriate.

The utility model is suitable for a duodenoscope, a gastroscope, a colonoscope or similar endoscopes. The principles of the present invention can also be applied to ultrasonic endoscopes and any other type of endoscope.

List of reference numerals

1 endoscope head

2 pivoting lever

3 endoscope head body

4-ring element

5 pulling rope

5A first guy line section

5B second stay cord section

5C fixed pull rope section

6 protective sleeve

11 working channel

16 water injection hole

17 Lighting device

18 camera

19 air/water nozzle

21 pivoting axis

22-rope pulley

41 fastening surface for a hose section of a bending section

42 fastening surface for a sheath

50 draw cord channel

61 fold region

62 fold region

110 working channel element (hose)

111 distal working channel exit

112 working channel section at the entrance of endoscope head

140 water pipe

150 air hose.

Claims

1. An endoscope, comprising:

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

a pivoting rod (2) which is movably arranged at the endoscopic head (1) and which is capable of pivoting a microtool advanced through the working channel (11);

characterized in that the pivot lever (2) has at least one camera (18) and a distal working channel outlet (111), the pivot lever (2) also having a lighting device (17).

2. An endoscope according to claim 1, characterized in that the endoscope head (1) is arranged distally from the curved section.

3. An endoscope according to claim 1 or 2, characterized in that the endoscope head (1) has an endoscope head body (3) at which the pivot rod (2) is pivotably supported, and that the endoscope head body (3) has an illumination device (17).

4. An endoscope according to claim 1 or 2, characterized in that the pivot rod (2) is pivotable to a first lateral side, wherein the camera (18) and the distal working channel outlet (111) are directed in a first lateral direction, and the pivot rod (2) is pivotable to a second lateral side opposite to the first lateral side, wherein the camera (18) and the distal working channel outlet (111) are directed in a second lateral direction.

5. An endoscope according to claim 1 or 2, characterized in that the pivot lever (2) is pivotable towards the distal side, wherein the camera (18) and the distal working channel outlet (111) point in the distal direction.

6. An endoscope according to claim 1 or 2, characterized in that at the endoscope head (1) there is provided a hinge structure about which the pivot rod (2) can pivot.

7. The endoscope of claim 6, wherein the articulation structure has a cable pulley over which a pull cable that is maneuverable from a proximal side of the endoscope is looped.

8. An endoscope according to claim 1 or 2, characterized in that the pivoting rod (2) has a working section at which at least the camera (18) and the distal working channel outlet (111) are arranged, and the endoscopic head (1) is surrounded by a sheath (6) between the working section of the pivoting rod (2) and a proximal section of the endoscopic head (1).

9. An endoscope according to claim 8, characterized in that said sheath (6) is elastic.

10. The endoscope according to claim 1 or 2, characterized in that the endoscope head (1) is free of an albolan rod.

11. An endoscope according to claim 1 or 2, characterized in that the endoscope is a rigid endoscope, wherein an endoscope tube is located at a proximal section of the endoscope head (1) in the proximal direction.

12. An endoscope according to claim 2, characterized in that the endoscope is a flexible endoscope, wherein the bending section is located at a proximal section of the endoscope head (1) in the proximal direction, the bending section being controllable from the proximal side of the endoscope.

13. An endoscope according to claim 1 or 2, characterized in that a clamping element is arranged in the endoscope head (1), which clamping element exerts a clamping action on the working channel (11) in a lateral end position of the pivoting rod (2) in order to clamp a microtool advanced in the working channel (11).

14. An endoscope according to claim 1 or 2, characterized in that the pivot lever (2) has a pivot shaft (21) with a cable pulley (22), and the pivot lever (2) is pivoted integrally with the cable pulley (22), a pull cord (5) operable by an operating unit of the endoscope being exerted on the cable pulley (22).