WO2013057206A1

WO2013057206A1 - Inserter element

Info

Publication number: WO2013057206A1
Application number: PCT/EP2012/070683
Authority: WO
Inventors: Fritz Pauker; Marc Henzler; Andreas KÜGLE
Original assignee: Digital Endoscopy Gmbh
Priority date: 2011-10-20
Filing date: 2012-10-18
Publication date: 2013-04-25
Also published as: DE102011084916A1

Abstract

The invention relates to an inserter element (1) having an inserter element body (11) into which a medical minimally invasive or an endoscopic instrument (2) can be inserted. The inserter element (1) has a tip (12), arranged on the distal end of the inserter element body (11), which tip can be opened.

Description

insertion

description

The present invention relates to an introducer having an introducer body into which an instrument is insertable and a tip located at the distal end of the introducer body.

STATE OF THE ART

In modern minimally invasive surgery, very small

Cuts and thereby allows very minor surgical trauma. The very small incisions reduce wound pain and cause minor scars on the area of intervention. This, in turn, is perceived as cosmetically advantageous, moreover, due to the faster healing of the intervention area, a shorter hospital stay results.

This is possible because the operation is performed by only one hole-like opening created by a so-called trocar to gain access to a body cavity (e.g., the abdominal cavity). The trocar itself is in its simplest form a tube (tube) with an inner diameter of z. B. 0.5-12 mm, in which a guided in the tube pin sits with a tip. The tip cuts through the tissue and penetrates into the body cavity together with the tube. The stylus is withdrawn leaving the tube in place and serving as a guide for an optical instrument (endoscope), gripping instrument, cutting instrument or other surgical instrument.

Trocars are made of plastic, titanium or so-called surgical steel. Trocars are designed as a one-time or multiple-use instrument. Depending on the shape of the tip, a distinction is made between a sharp and a blunt trocar. In the following description, the phrase "proximal end / proximal side" is used to refer to the end / side facing the attending physician. "Distal end / distal side" is used to close the end / side which points away from the attending physician - ie towards the patient.

OBJECT OF THE INVENTION

The object of the present invention is to provide an improved insertion element.

This object is achieved by an insertion element with the feature of claim 1. Advantageous developments are the subject of the dependent claims. An improved endoscopy system is disclosed in claim 15.

In the present invention, the introducer has an introducer body into which a minimally invasive medical or endoscopic instrument is insertable, and an openable tip disposed at the distal end of the introducer body.

When closed, the openable tip serves to create a body opening by piercing the tissue. The insertion element can then be inserted into the body. The openable tip allows the instrument to penetrate after insertion into the body. This results in a simple and inexpensive insertion, which is easy to handle.

The openable tip may be formed of a resilient material and the openable tip adapted to be bent by a distal end of the instrument carried in the introducer body. Such an elastic material may, for. B. be a metal or a plastic. Prerequisites for the material are only compatibility with the body to be treated and sufficient elasticity that allows the opening movement of the tip. Thus, any material that meets the conditions fulfilled, suitable. Bending through the distal d .h. the front end of the guided in Einführelementkörper instrument provides for a simple opening operation. Additional facilities for opening the tip are not required.

The openable tip and the introducer body may be integrally formed of the elastic material. As a result, the entire insertion element is made of a material. This simplifies the manufacturing process and reduces costs.

The introducer may have a handle disposed at the proximal end of the introducer body. By means of the handle, the insertion element can be pulled out of the generated body opening in a simple manner.

The handle may be formed as a perpendicular to the proximal end portion of the Einführelementkörpers directed flange. Since the instrument is guided in the introducer body, a flange arranged perpendicular to the introducer body is always easily actuated. When pulling out the insertion only the flange must be pressed away from the body.

The flange of the handle may be provided with a through hole in which the outer peripheral edge of the proximal end of the insert body is fixedly inserted. Then handle and Einführelementkörper are integral and sufficiently firmly connected.

The introducer body may have an axial slot along its entire longitudinal extent at least at the portion where an instrument is insertable. The introducer body may be bendable at the axial slot. Thus, the insertion can be pushed away from the body after pulling out of the body opening on the instrument shaft and be solved by a laterally away from the instrument movement of the insertion due to the bending of the insertion at its axial slot carefully from the instrument. The instrument may then remain inserted in the body opening. The insertion element body may have an axial predetermined breaking point along its entire longitudinal extent at least at the portion at which an instrument can be inserted. The insertion element body can be breakable at the axial predetermined breaking point. This can be solved by the instrument by the breaking point is broken. Such an insertion element can be used as a one-way insertion element and has good guidance on the instrument.

The introducer body may have an overlap of its cylindrical peripheral wall along its entire longitudinal extent. In this case, the overlap is expandable so that the dimension of the cross-sectional area of the Einführelementkörper is changed. The wall of the cylinder-like introducer body is "rolled up." Instruments of different diameters can be inserted into the introducer body and the rolled wall conforms to the diameter of the inserted instrument larger diameter than the initial dimension, the cross-sectional area is increased.

A tube-like channel may be formed on the circumference of the introducer body along the longitudinal direction of the introducer body. The channel is preferably located at a portion of the periphery of the introducer body opposite to the slot, the predetermined breaking point or the overlap. Through this channel, a connection of the body space is created to the outside. This compound can be used for gas injection (insufflation). Under certain circumstances, an extraction would be possible through this channel.

The introducer body and the tip may be made of a so-called shape memory material. Under load, ie. when effected by the instrument end Aufdrückvorgang, the material of the tip is bent. When relief, ie when the instrument end is retracted again into the Einführelementkörper, the material returns by its internal tension in its original form back. A shape memory material is therefore particularly well suited for a multiple-way insertion element.

The openable tip may consist of several wings articulated elastically on the introducer body. Each wing is at its proximal

Base side connected to the Einführelementkörper and tapers from the proximal base side to a distal end point, wherein its extending from the proximal base side to the distal end point lateral sides in the closed state in contact with the corresponding sides of the adjacent wing. Such an openable tip opens like a flower. A simple and safe design of an openable insertion element is made possible.

The tip, the tip area or the entire insertion element may be made of a transparent material. Unlike non-transparent materials, the surgeon can see through the tip when inserting a transparent tip introducer. A transparent tip thus allows an extremely accurate handling in the determination of the puncture point of the insertion.

The tip can be sealed in the unopened state. In this case, the side surfaces of the tip, which are moved away from each other when opening the tip, have a sealing material. The side surfaces of the tip may also have such a surface as to provide sufficient sealability of the closed tip. Thus, the tip can take over a sealing function when pulling out of the instrument.

The above-explained aspects of the present invention can be suitably combined.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 shows a schematic perspective view of an insertion element according to a first embodiment with a closed tip. Fig. 2 shows a schematic perspective view of the insertion element of the first embodiment with the tip open.

Fig. 3 shows a schematic perspective view of the insertion of the first embodiment in a peeling operation.

FIG. 4 shows a handle of the insertion element according to the invention, FIG. 4A is a side view, FIG. 4B is a rear view, FIG. 4C is a perspective view, and FIG. 4D shows an enlarged fragmentary perspective view from the rear.

5 shows the tip of a round insertion element according to the invention, FIG. 5A showing the tip in a front view, and FIG. 5B showing the tip in a perspective view.

FIG. 6 shows an insertion element according to the invention with a triangular cross-section and a single-leaf tip.

FIG. 7 shows a round insertion element according to the invention with a bevelled tip, FIG. 7A shows a perspective view and FIG. 7B shows a side view.

Fig. 8 shows a to FIG. 4 is a view similar to that of further embodiments, wherein FIG. 8A shows a side view of an introduction element with a gas introduction channel, FIG. 8B shows a rear view, FIG. 8C is an enlarged fragmentary perspective view from the rear, FIG. 8D is a sectional view of a wall overlap inserter, and FIG. 8E is a perspective view of the wall overlap inserter.

Hereinafter, the present invention will be described in more detail by way of embodiments. First embodiment

Hereinafter, a first embodiment with reference to Figures 1 and 2 will be described. Fig. 1 shows a schematic perspective view of an insertion element according to the first embodiment with closed tip.

As shown in FIG. 1, the insertion element body 11 can be inserted into the insertion element body 11, which is a medical minimally invasive instrument (gripping instrument, cutting instrument or other surgical instrument) or an endoscopic instrument (image recording device or illumination device) ) can be.

In the present exemplary embodiment, the insertion element according to the invention has a hollow-cylindrical introduction element body 11 which has an openable tip 12 at its distal end. The insertion body 11 of the present embodiment is formed of an elastic material. In an alternative, but at least the tip 12 is formed of an elastic material. The tip 12 consists of several wings. The wings are normally closed (unloaded). The wings are tapered to their distal end, which is opposite to the introducer body 11, with the distal end of the wings forming the puncture point of the closed tip. The wings of the tip are attached to the insertion element body 11 facing base side of the circular end face of the Einführelementkörpers 11. The base side of the wings thus has a circular arc shape or a circular arc-like shape. The wing can be curved inward (viewed from the interior). The base side forms a bending line on which the wing can be bent outward due to its elasticity. When the wings are bent open, thus the tip 12.

At its proximal end, the introducer body 11 of the introducer 1 is provided with a flange 14 described below as the handle 14. The medical minimally invasive instrument 2 or the endoscopic instrument 2 can be inserted from the proximal end into the introducer body 11. In 1, the insertion element 1 is shown so that an instrument 2 is inserted into the insertion element body 11. Along the longitudinal extent of the insertion element body 11, the insertion element body 11 is provided with a slot 13 on its cylinder wall. This slot 13 penetrates in the present embodiment, the entire cylinder wall of the Einführelementkörpers 11 both radially and axially. Therefore, in the present embodiment, the insertion member body 11 is a cylinder without a closed cylinder wall. The slot 13 may be designed as a gap so that the slot 13, the cut cylinder wall sides are spaced from each other. The slot 13 can also be designed so that a bias in the material which presses the cut cylinder wall sides slightly to each other so that they touch. Along this slot 13, the introducer body 11 is openable by the cylinder wall is bent at the slot 13.

The insertion element 1 according to the invention is applied as follows. The introducer 1 is slid into the tissue with the tip 12 closed at the desired location to create an opening in the tissue that provides access to a body cavity. The instrument 2 is inserted into the proximal opening of the introducer body 11 on the handle 14 side. When the tip 12 of the introducer 1 has reached the body cavity of the patient, the stem 21 of the instrument 2 in the introducer body 11 is moved forward until its end surface 22 reaches the tip 12 of the introducer 1. By further pressing the instrument 2 in the distal direction, a pressure of the distal end surface 22 of the shaft 21 of the instrument 2 is exerted on the inner peripheral surface of the tip 12 of the insertion element 1, whereby the wings of the tip 12 due to the material elasticity to the outside bend, whereby the distal end portion 21a of the shaft 21 of the instrument 2 can be pushed through the opened tip 12 of the insertion element 1. This situation is shown in FIG. Thus, the front end of the instrument 2 can look into the body cavity. The desired surgical procedure, the desired diagnosis or the like can now be performed. The insertion element 1 can remain in this position. It can be removed after the operation. Alternatively, after the front portion 21a of the shaft 21 of the instrument has opened the tip 12 of the insertion member 1, the insertion member 1 can be pulled out of the body along the shaft 21 by means of the handle 14. When the tip 12 is pulled out of the body, the insertion element 1 can be gripped on the handle 14 and pulled in a direction away from the shaft 21 of the instrument 2 direction. In this case, the cylinder wall of the Einführelementkörpers 11 opens at the slot 13, starting from the side of the flange 14 (handle side) due to the elasticity of the material of the Einführelementkörpers 11. Such a situation is shown in Fig. 3 shown. Fig. 3 shows a schematic perspective view of the insertion of the first embodiment in a peeling operation. In this situation, a distal end portion I Ia of Einführelementkörpers 11 is still on the shaft 21 of the instrument 2 and a proximal end portion I Ib is already deducted. The entire introducer body 11 can be withdrawn slowly from the instrument 2 in the lateral direction due to the elasticity of its material and the formation of the longitudinal slot 13 in the lateral direction. Thus, the insertion element 1 can be removed, leaving the instrument 2 in the body and the operation is performed.

Description of the handle 14

An example of the handle 14 for both embodiments will be described below with reference to FIG. 4.

FIG. 4 shows a handle of the insertion element according to the invention, FIG. 4A is a side view, FIG. 4B is a rear view, FIG. 4C is a perspective view, and FIG. 4D shows a fragmentary perspective view from the rear.

The handle 14 is formed as a rectangular plate shape and has adjacent to one of its short sides of the rectangular shape a through hole 14 a. The through-hole 14a forms an imaginary tangent to the edge of the rectangular surface on the side of the through-hole which is opposite to the center of the rectangular surface of the handle 14, this tangent region being open, as shown in FIG. 4D is clearly shown. Into the through hole 14a, the outer peripheral edge of the proximal end of the insertion member body 11 is fixedly inserted. It can be used flush with the rectangular surface of the handle 14. The slot 13 of the Einführelementkörpers 11 is arranged so that the course direction of the slot 13 points to the tangent region of the through hole 14a. When the handle 14 and the insertion member body 11 are formed of a metal such as a superelastic metal, the insertion body 11 and the handle 14 may be replaced by a suitable one

Welding process be connected. When the introducer body 11 and the handle 14 are formed of plastic, they may also be welded or may be manufactured as a body by, for example, a molding operation. The introducer body 11 and the handle 14 are integral. At its opposite surface to the tip 12, the handle 14 is provided with a roughening, such as notches or ridges, which run parallel to the short end sides of the handle 14. Also on the surface 12 pointing to the top of the handle 14 may be provided with the roughening. The roughening may alternatively run parallel to the longitudinal side of the handle 14. In a further alternative, the roughening may form crossing lines. Any other forms of roughening are conceivable. The roughening of the handle 14 facilitate the gripping of the handle 14 when pulling out the insertion element 1.

Shape of the top 12

Hereinafter, possible shapes of the tip 12 of the insertion member 1 according to the invention will be described. In the embodiments 1 and 2, the tip 12 of the insertion element 1 is constructed as dreiflüglige tip. Such a tip is shown in FIG. 5 shown in more detail. Fig. Fig. 5 shows the tip of a round insertion element, Fig. 5A showing the tip in a front view, and Fig. 5B showing the tip in a perspective view.

In Fig. 5, the insertion element 1 has an openable tip 12 of three elastically hinged wings on Einführelementkörper 11. The three wings are each connected to the insertion element body 11 at their proximal base side. the. The wings taper from the proximal base to a distal end point that serves as a puncture point. The lateral sides of each wing, extending from the proximal base side to the distal end point, are in closed contact with the corresponding sides of the adjacent wing.

The wing can be curved inward (viewed from the interior). In an alternative, the wing may also be designed without buckling at its distal end region, which forms the puncture point. In this alternative, the wing transitions from a circular sector shape at its base side to a flat shape at its distal end region.

In a polygonal cross section (triangular, square, secheckiger, octagonal, etc. cross section) of the Einführelementkörpers 11, the wing can be designed completely without curvature, so be completely flat.

However, the present invention is not limited to this tip shape. FIG. 6 shows an insertion element according to the invention with a triangular cross-section and a single-leaf tip.

The tip 112 of Fig. 6 is a single-vane tip. In contrast to the tip 12, the end point of the tip 112, which first strikes the tissue during insertion, is not centric, ie. axially with respect to the introducer body 11, but near the wall of the introducer body 11. The distal end of the introducer body 11, where the tip 112 is located, thus tapers, see FIG. 6, towards the distal end point. As it bends through the end of the shaft 21 of the instrument 2, the single-headed tip 112 is then bent away from this distal end point. In the triangular cross-section of FIG. 6, the slot / predetermined breaking point at the lowermost side of the introducer body 11 in FIG. 6 be formed, d .h. on the longitudinal extension line of the circumference of the insertion element body 11, which points to the end point of the tip 112. FIG. 7 shows a round insertion element according to the invention with a bevelled tip, FIG. 7A shows a perspective view and FIG. 7B shows a side view.

The shape of the tip of Fig. 7 is formed in the manner of an obliquely cut cylinder. The tip 212 is formed as a double-lobed tip, and considering the insertion member body 11 from the slot 13, one wing of the tip 212 on the left side of the slot 13 and one wing of the tip 212 on the right side of the slot 13 are arranged.

The opposite to the slot 13 sides of the wing of the tip 212 are located at the distal end portion of the obliquely cut cylindrical shape, which can be designed sharply scalpel-like. This makes it possible to use it like a cutting trocar.

The wings of the tip 212 each have in plan view a peripheral shape of a letter D with a straight line and a semicircle. In the middle of the semicircle, ie. opposite to the midpoint of the straight line, each of the two wings has a hinge connection, by means of which it is articulated on the cylinder wall of the insertion element body 11. Depending on the material of the insertion member body 11, the length of this hinge can be suitably selected. For example, the length of the hinge may be 10%, 20% or one third of the circumferential length of the semicircle of the D-shape.

Other tip shapes are applicable to the insertion element according to the invention. Fig. 5 shows the insertion member with a three-winged tip 12. Similar to this configuration, four, five or more wings can be arranged distributed around the circumference of the distal end of the insertion element body 11. Each of these wings is connected at its proximal base to the introducer body, tapers from the proximal base to a distal end point, and its lateral sides extending from the proximal base to the distal end point are in closed contact with the respective sides of the adjacent blade , Second embodiment

Hereinafter, a second embodiment will be described with reference to Figs. 8A to 8C.

Fig. 8 shows a to FIG. 4 similar view in view, wherein FIG. 8A shows a side view of an insertion element of the second embodiment, FIG. 8B shows a view from the rear, and FIG. 8C shows an enlarged fragmentary perspective view from the rear.

In the first embodiment, the insertion member body 11 is formed as a cylinder 13 provided with a slit. In the second embodiment, the structure of the introducer body 11 is similar, with a gas introduction channel (insufflation channel) 31 added. The gas introduction passage 31 extends on the cylinder outer wall of the insertion body 11 along the longitudinal direction thereof on a side opposite to the slot. In the present embodiment, the gas introduction channel 31 continues in the flange of the handle 14. The flange of the handle is provided on its distal side at a position which is adjacent to the bore 14a (see Fig. 4B) in the direction opposite to the bore 14a opposite side surface of the flange, provided with a blind hole. The flange of the handle is also provided along its longitudinal extent in its central region with a bore which connects the blind hole with the bore 14a opposite side surface of the flange. At this outer surface, which forms the surface of the flange facing away from the insertion element body 11, a connection is provided at the channel entrance.

The gas introduction channel 31 thus has in this embodiment, a tubular portion on the cylinder outer wall of the Einführelementkörpers 11 and designed as a bore portion in the flange of the handle 14.

Incidentally, the distal end, d .h. the tip of the insertion element 1 when pulling out the instrument again automatically by the spring restoring force (at the tulip-shaped opening) close. This eliminates the need mechanism at the proximal end of the trocar to prevent the escape of insufflation gas.

In addition, the flange 14 may have slots (indicated by S-shaped lines in FIGS. 8B and 8C) at the edge region of the bore 14a which facilitate bending of the introducer body 11.

Other alternatives

The insertion element according to the invention may be made of plastic or of a metal or a metal alloy, which have a sufficient for the Aufbiegvorgang the openable tip elasticity. The material of the insertion element according to the invention is not limited to plastic, metal or metal alloy, as long as the Aufbiegvorgang can be accomplished in a sufficiently safe manner. Particularly advantageous is an insertion of so-called superelastic material or a material with a shape memory. Such an insertion can be used very advantageous as reusable instruments. It does not have to be the entire insertion of the aforementioned elastic material. In an alternative, it suffices if only the bendable and therefore openable tip or tip region is made of the aforementioned elastic material.

The tip, the tip area or the entire insertion element may be made of a transparent material. By the term tip region is meant the tip and the distal end region of the introducer body 11 which is adjacent to the tip. A transparent tip allows the surgeon extremely precise handling in determining the puncture point of the introducer. In contrast to previous materials that were not transparent, the surgeon can see through the tip when inserting a transparent tip introducer.

In the embodiments described above, the slot 13 is formed as a slightly open gap. The gap 13 can also be closed Be formed gap. In a further alternative, at the location of the slot 13, a scored predetermined breaking point in the cylinder jacket can be provided at an insertion element, which is intended for a single use.

In a simplified form, the insertion element body 11 may also be formed without the slot 13.

In the second embodiment, the gas introduction passage 31 has the tube-like portion on the cylinder outer wall of the insertion member body 11 at the portion of the cylinder wall opposite to the slit 13. In an alternative, the tubular portion of the gas introduction channel 31 may be disposed on the inside of the cylinder wall of the introducer body 11 when the stem of the instrument is provided with a corresponding groove. In a further alternative, the tubular portion of the gas introduction channel 31 may not necessarily be disposed opposite to the slot 13, but may be disposed at any position on the circumference of the wall of the introducer body 11 while maintaining a suitable distance from the slot 13. Even an arrangement adjacent to the slot is conceivable. In a further alternative, the gas introduction channel 31 can dispense with the section designed as a bore in the flange of the handle 14. The blind hole in the flange is then formed as a through hole and has a channel connection element on its proximal side.

The handle 14 is not limited to the exemplary flange shape of FIG. 4. The handle may for example be designed as a simple pen. It does not have to extend perpendicularly from the introducer body 11. In an alternative, the handle may also extend obliquely from the proximal end of the introducer body 11. The introducer body 11 may also have at its proximal end a barrel widening on which a handle extends axially away from the introducer body 11, with the handle and introducer body then being approximately coaxial with one another.

The insertion element body 11 may, in an alternative, instead of the slot 13 or the predetermined breaking point 13 along its entire longitudinal extent, have an overlay. Lappung 11c has its cylindrical peripheral wall. This alternative is shown in Figures 8D and 8E. As shown in Figures 8D and 8E, the wall portions of the insert body 11 overlap one another, and the wall of the cylinder-like introducer body is "rolled up." The overlap 11c is expandable to change the dimension of the cross-sectional area of the introducer body Insertion member body is inserted and the rolled-up wall conforms to the diameter of the inserted instrument, and the insertion member body has a cross-sectional area output dimension When inserting an instrument, the cross-sectional area is increased with a larger diameter than the initial dimension The overlap is not limited to the cylinder-like insertion member body and can also be applied to the polygonal cross-section.

The distal opening opened by the instrument, i. E. the wings of the tip, can form a kind of anchorage, which prevents the insertion element from slipping out during the operation. In an alternative, the wings of the tip can be provided with radially projecting elevations, which form additional anchoring bodies in the expanded state.

The side surfaces of the wings of the tip, which are moved away from each other when opening the tip, may have an additional sealing material. The side surfaces of the wings of the tip itself may also have such a surface that they provide sufficient sealing ability of the closed tip even without an additional sealing material. Thus, the tip is sealed in the unopened state.

The insertion element 1 can be kept ready with a sterilization insert. As a result, the application of the insertion element according to the invention is very hygienic.

LIST OF REFERENCE NUMBERS

1 insertion element 11 introducer body

I Ia distal end portion of the Einführelementkörpers

I Ib proximal end portion of the introducer body

11c overlap

12, 112, 212 tip

13 slot, gap, breaking point

14 handle

14a through hole

2 medical minimally invasive instrument or endoscopic instrument

21 Shaft of the instrument 2

21 a distal end, front end of the shaft 21

22 end face of the shaft 21st

31 gas injection channel

Claims

claims

1. insertion element (1) with

an introducer body (11) into which a medical minimally invasive or an endoscopic instrument (2) can be inserted, and

an openable tip (12; 112; 212) disposed at the distal end of the introducer body (11).

2. insertion element (1) according to claim 1, wherein

the openable tip (12; 112; 212) is formed of an elastic material, and

the openable tip (12; 112; 212) is adapted to be bent by a distal end (21a) of the instrument (2) guided in the introducer body (11).

3. insertion element (1) according to claim 2, wherein

the openable tip (12; 112; 212) and the introducer body (11) are integrally formed of the elastic material.

4. insertion element (1) according to claim 1 or 2, with

a handle (14) disposed at the proximal end of the introducer body (11).

5. insertion element (1) according to claim 4, wherein

the handle (14) is designed as a flange oriented perpendicular to the proximal end portion of the introducer body (11).

6. insertion element (1) according to claim 5, wherein

the flange of the handle (14) is provided with a through hole (14a) in which the outer peripheral edge of the proximal end of the insertion member body (11) is fixedly inserted.

7. insertion element (1) according to any one of claims 1-6, wherein

the introducer body (11) has an axial slot (13) along its entire longitudinal extent, and

the Einführelementkörper (11) on the axial slot (13) can be bent.

8. insertion element (1) according to any one of claims 1-6, wherein

the insertion element body (11) has an axial predetermined breaking point (13) along its entire longitudinal extent, and

the Einführelementkörper (11) at the axial predetermined breaking point (13) is rupturable.

9. insertion element (1) according to any one of claims 1-6, wherein

the insertion element body (11) has an overlap (11c) of its cylinder-like peripheral wall along its entire longitudinal extent, and

the overlap (11c) is expandable such that the dimension of the cross-sectional area of the introducer body (11) is changed.

10. insertion element (1) according to any one of claims 1-9, wherein

a tube-like channel (31) is formed on the circumference of the introducer body (11) along the longitudinal direction of the introducer body (11);

wherein the channel (31) is preferably disposed at a portion of the circumference of the introducer body (11) opposite to the slot (13), the predetermined breaking point (13) or the overlap (11c).

11. insertion element (1) according to any one of claims 1-10, wherein

the introducer body (11) and the tip (12) are made of a shape memory material.

12. insertion element (1) according to any one of claims 1-11, wherein

the openable tip (12) consists of several wings elastically articulated on the insertion element body (11),

wherein each wing is connected at its proximal base side with the introducer body (11), from the proximal base side to a its distal end point is tapered, and its lateral sides extending from the proximal base side to the distal end point are in closed condition in contact with the corresponding sides of the adjacent blade.

13. insertion element (1) according to any one of claims 1-12, wherein

the tip, the tip area or the entire insertion element made of a transparent material.

14. insertion element (1) according to any one of claims 1-13, wherein

the tip (12; 112; 212) is sealed in the unopened state.

15. insertion element (1) according to any one of claims 1-14, wherein

the axial slot (13) in the cylindrical introducer body (11) is designed as a gap so that the slit (13), the cut cylinder wall sides of the Einführelementkörpers (11) facing each other at a distance.

16. Endoscopy system with

at least one insertion element (1) according to one of claims 1-15 and

at least one medical minimally invasive instrument (2) and / or at least one endoscopic instrument (2).