WO2001008572A1 - Cannula system for introducing endoscopic tools in a human or animal body - Google Patents

Cannula system for introducing endoscopic tools in a human or animal body

Info

Publication number
WO2001008572A1
WO2001008572A1 PCT/EP2000/007242 EP0007242W WO0108572A1 WO 2001008572 A1 WO2001008572 A1 WO 2001008572A1 EP 0007242 W EP0007242 W EP 0007242W WO 0108572 A1 WO0108572 A1 WO 0108572A1
Authority
WO
Grant status
Application
Patent type
Prior art keywords
cannula
hollow
stylet
assembly
tip
Prior art date
Application number
PCT/EP2000/007242
Other languages
German (de)
French (fr)
Inventor
Norbert Heske
Thomas Heske
Original Assignee
Norbert Heske
Thomas Heske
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34Trocars; Puncturing needles
    • A61B17/3476Powered trocars, e.g. electrosurgical cutting, lasers, powered knives
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34Trocars; Puncturing needles
    • A61B17/3417Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34Trocars; Puncturing needles
    • A61B17/3474Insufflating needles, e.g. Veress needles
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34Trocars; Puncturing needles
    • A61B17/3417Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
    • A61B2017/3454Details of tips
    • A61B2017/3458Details of tips threaded
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34Trocars; Puncturing needles
    • A61B2017/348Means for supporting the trocar against the body or retaining the trocar inside the body
    • A61B2017/3482Means for supporting the trocar against the body or retaining the trocar inside the body inside
    • A61B2017/349Trocar with thread on outside
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/0043Catheters; Hollow probes characterised by structural features
    • A61M2025/006Catheters; Hollow probes characterised by structural features having a special surface topography or special surface properties, e.g. roughened or knurled surface

Abstract

The invention relates to a cannula system for introducing endoscopic tools in a human or animal body. Said system comprises a hollow cannula (1) which forms a transit channel inside the body after penetrating the skin layers, as well as a mandrel (8) which can be inserted into said hollow cannula (1). The inventive cannula system is characterised in that the hollow cannula (1) has an outer wall (3) with a coaxial screw-type profile surrounding the longitudinal axis of the cannula in a helical manner and in that the mandrel (8) is provided in the form of a straight cylinder allowing the hollow cannula (1) to penetrate the skin layers. The mandrel has an outer profile which matches the inner profile of the hollow cannula (1) so that the mandrel (8) can be precisely inserted in the hollow cannula (1) and is provided with a conical distal tip (10) from which a screw thread (11) widens in a helical manner, whereby the shape, volume and size of said screw thread corresponds to the helical thread (2) of the outer wall (3) of the hollow cannula (1), at the transition between said conical tip (10) and the mandrel (8) in the form of a straight cylinder.

Description

The cannula assembly for introduction of endoscopic instruments into a human or animal body

technical field

The invention relates to a cannula assembly for introduction of endoscopic instruments into a human or animal body with a hollow needle forming a passageway in intrakorpulare areas after penetration of the skin layers, and with a stylet which is inserted into the hollow cannula.

State of the art

In the field of minimally invasive surgery, a variety of surgical procedures using endoscopic instruments and endosurgical be performed. In order to engage the endoscopic instruments to the site to be operated inside the body, the hollow needles are inserted through the skin layers, as working channels for insertion of endoscopic surgical instruments and are similar in the body interior.

Previously known hollow cannulas point at its distal end a cutting tip with which they cut the tissue to be penetrated literally. For introducing a known hollow needles, for example, through the abdominal wall into the interior of the body it will be severed to create a puncture opening locally with a scalpel blade. By the forming section opening in the abdominal wall, the distal, sharpened end will be pushed axially into the interior of the body, whereby the cutting tip by separating during insertion vessels, nerves, muscle fibers. This results primarily bleeding, which complicate the surgery. Further, stronger scar formations are formed from cutting due to injury during the healing process, leading to an increased to weather or other pain associated side effects. Through the axial insertion of the hollow needles, for example in the abdominal cavity, the abdominal wall is also subject to considerable stretching force, which may be associated with traumatic tissue irritation. Thus, the caused by the introduction process of the hollow cannula in the abdominal wall indentations may lead to strong compressions on the internal organs, such as the intestines, whereby internal organs can be drawn in large affected. Also bleeding within the inner abdominal cavity using known hollow cannula with the surgical techniques described in the interior of the body can not be excluded.

The usually formed with a smooth outer wall, known hollow needles can be fixed relative to the penetrated skin layer does not on its own in addition to introduction into the body interior. When performing subsequent operations endoscope endoscopic instruments are used, which are carried out through the hollow cannula. It constantly take place relative movements between the hollow needle and the penetrated skin layer, making them strong even during surgery mechanical loads is subject.

Summary of the Invention

The invention is based on the object to configure a Kanülenanorndung for introduction of endoscopic instruments into a human or animal body with a hollow channel-shaped needle forming a passageway in intracorporeal regions after penetration of skin layers such that during the Einbringvorganges in the body interior as well as while performing endoscopic operations on the impacting ends to puncture skin layer or core slabs mechanical stress associated with traumatic tissue irritation, should be substantially reduced. In particular, the disadvantages of the prior art to be avoided.

The solution of the problem underlying the invention is indicated in claim. 1 advantageously the inventive idea further developing features are the subject of the dependent claims.

According to the invention, a cannula assembly for introduction of endoscopic instruments into a human or animal body with a hollow needle forming a passageway in intrakorpulare areas after penetration of the skin layers, and with a stylet which is inserted into the hollow cannula is formed such that the hollow cannula has an outer wall having a coaxially to the cannula longitudinal axis helically revolving screws contour, and that is formed to penetrate the hollow cannula through the skin layers of the stylet as geradzylinderförmiger stylet having an outer contour which is matched to the inner contour of the hollow cannula so that the stylet snugly slidable in the hollow cannula , and having a distal Enbereich with a tip, which is inscribed on a cone and the proximal helical screw thread extending from its tip.

The combination of a hollow cannula that has a lifting-off from its surface to the outer wall screws contour, and a stylet, which provides at its distal end a tapered tip with a screw thread, it is possible the needle assembly be screwed by skin layers without claiming the skin layers due and in particular without cutting the skin layers and the underlying tissue areas.

For gentle introduction of the hollow needle is inside the body of the stylet geradzylinderförmiger with its screw thread in the manner of a corkscrew, the skin layers substantially to the side dillatiert without violating these averages. By rotation of the needle assembly, the stylet distally operates largely automatically into the tissue.

The essential factor is the inventive design of the screw thread on the conical tip of the stylet, which has a selbstvortreibende effect, as they are known by a per se known wood screw.

The length of the stylet is sized to completely protrudes upon full insertion of the mandrel into the hollow cannula, the tapered tip of the stylet to the distal end of the cannula. The transition between the hollow cannula and the stylet is preferably without intermediate gap so that no tissue components can be caught between the stylet and hollow needle with a corresponding Durchdringungsvorgang through a skin layer. On the one hand, the outer diameter of the mandrel to the inner diameter of the hollow needle is, as already stated above, adapted to fit, on the other hand, the outer contour of the cannula in the distal region is continuously hugs the outer periphery of the stylet.

At the proximal end of the hollow cannula a corresponding recess is provided, into which a raised on the outer wall of the mandrel pin-like projection engages with a corresponding rotation and which bears in one or other direction to a, provided in the recess abutting edge. Thereby, the hollow cannula is also caused to rotate upon rotation of the stylet. The pin-like projection on the proximal portion of the stylet, as well as the recess at the proximal end of the cannula are configured such that when a rotational direction in which the screw thread of the mandrin and the hollow cannula can be distal to screw into a body cover, the screw thread at the distal transition from cannula mandrin transitions smoothly.

In order to produce the rotary movement of an electric motor drive is provided, preferably formed as a hand tool and having a rotary shaft to which the stylet with its proximal end is detachably attachable via a push-lock connection. the electric motor drive can legally the stylet and the patch on hollow cannula or driving left-handed via a corresponding toggle switch.

For the introduction of the inventive design Kanülenanprdnung, for example, through the abdominal wall into the stomach interior, preferably, the abdominal wall is scored locally with a scalpel. By gently place the tip of the stylet and simultaneous rotation of the cannula assembly to the cannula longitudinal axis of the helical contour on the distal tip of the stylet is capable of introducing the entire cannula assembly in selbstvortreibender way through the abdominal wall. A particular advantage of the helical screw thread formed by the fact that the tip of the Mandirns opposing tissue is only displaced laterally, while the tip moves distally forward proves during Einbringvorganges. In this way, no or substantially lower cuts in the tissue caused that would extend a subsequent healing.

Medical studies have shown that in the pre-marked displacement process, no cells were severed within the meaning of cut to be, but only in cell groups existing "break points" are temporarily resolved that enter their original connection quickly after appropriate re-assembly. This is also the reason for a subsequent rapidly extending healing process which is without remaining long-lasting wound pain.

The advancement of the stylet and the seated on the stylet hollow cannula does not go as far by axial pressure on the needle assembly, but only by the rotary movement by means of the electromotive hand-held device whose rotational speed is preferably in the range between 0.1 and 10 revolutions per second, ensures the proper advancement of the needle assembly within the tissue. No neighboring organs are compressed by deformation of the abdominal wall or deformed by the self-propulsion of the cannula system, which benefits the implementation of a friendly operation.

However, forming the tip of the stylet of relatively blunt, so that, although for the piercing into the abdominal wall it must anritzen using a small scalpel, this has the advantage that forced away laterally in the direction of advance in front of the cannula assembly tissue regions located or even internal organs be without running the risk of cutting them. This results in minimal injury also located inside the body organs, leading to completion of the operation process in a faster healing process.

Summary of the Invention

The invention is described below, without limiting the general inventive idea with reference to embodiments with reference to the accompanying drawing. Show it:

Fig. 1a, b hollow channel-like cannula with external thread and stylet with tapered tip with an external thread,

Fig. 2 elekromotorische rotary unit,

Fig. 3 stylet with a hollow channel, and

Fig. 4 Alternative, hollow channel-like cannula with external thread and stylet with tapered tip with an external thread

WAYS OF IMPLEMENTING THE INVENTION, INDUSTRIAL APPLICABILITY

In Figure 1a a hollow cannula 1 is shown, which has a basic shape in the form of a straight hollow cylinder. On the outer wall of the hollow needle 1, a screw 2 is provided, which rises from the outer wall 3 of the hollow cannula. 1 Tests on skin samples showed that in the formation of the hollow cannula made of Teflon a smooth sliding through the hollow cannula through the skin layer. The distal-side region of the hollow needle 1 is rectilinearly cut off and ends in a circular shaped cannula edge 4, the distal wall thickness is thinned to a minimum. The screw thread 2 ends on the cannula edge 4 directly in an unchanged form. Also, the cannula edge 4 may include a transition portion 4 'auweisen in the intermediate area between two screw threads.

At the distal end of the hollow needle 1, a recess 5 is provided which is delimited by two stop edges 6. 7 Between the abutment edges 5, 6 an inclined portion S is provided in order to increase the distance between the abutment edges 6, 7 and thus to provide an improved possibility completely the stylet in the Hohkanüle - as described later - to sink. In the contour of the recess in close proximity to a stop edge of a depression V, in addition to the hollow cannula be incorporated to enable a detent engages in the pin-like projection in the recess.

Typical dimensions for the inner diameter d of the hollow cannula between 4 and 25 mm. The path difference h of the coil contour 2 is about 3-8 mm. The height a of the coil contour has typical values ​​between 0.5 and 2 mm.

engages in the recess 5 as will be described below, a pin-like extension 9 a which is provided at the proximal end of a stylet 8 which is shown in Figure 1 b. The stylet 8 has a attached to the inner contour of the hollow channel 1 geometry and provides, moreover, at its distal end a tapered tip 10 prior to the outer contour of a screw thread is provided. 11 Preferably, the cross-section of the screw thread to a saw-tooth geometry 12, illustrated in the detail view according to Figure 1b. The sawtooth-formed structure has a sharp edge 13 with which the skin layer can be automatically separated. In this way it is ensured that the being drilled skin site is only so far cut or dilated so that the hollow cannula can be inserted with its outer circumference inside the body.

The stylet 8 is preferably like the hollow cannula made of Teflon made to improve the sliding properties. At the tip of the stylet 8 is a kind of an implant made of a harder material is preferably incorporated for the sake improved penetration capacity, for example of metal.

The proximal end of the stylet 8 has for attachment to a rotary shaft 14, a rotary unit 15 (shown in FIG 2), a bore 16, which ensures a fixed releasably attaching the mandrel to the rotary unit 15 °. The rotary unit 15 shown in FIG 2 is provided with a toggle switch 17 that provides, depending on the tilting position for a right or left rotation of the rotary shaft fourteenth At which the rotary shaft 14 the opposite end of the rotary unit 15 a closable with a lid 18 battery compartment is provided, whereby the turning unit 15 can be used as a completely portable tool.

The patch on the rotation shaft 14, stylet 8 is secured with the aid of a snap ring, not shown in the figure and ensures withdrawal of the stylet 8 from the shaft 14 by means of a certain force expenditure. About the stylet 8 of the hollow channel 1 is inserted below, until the pin-like extension 9 rests in the recess 5 on a stop edge 6. 7 By rotational movement of the stylet 8 and the hollow cannula 1 is simultaneously set in rotation, the bores into the interior of the body by respective skin layers.

The hollow cannula is introduced accordingly by the skin layer, the inner mandrel can be removed from the hollow channel 8. To avoid tissue irritation, it is necessary for that purpose, the supernatant conical tip 10 that may be inserted along its entire length in a tissue area almost completely turn back distal from the hollow channel 1, in the interior of the hollow needle. For this purpose, the operator turns the opposite direction of rotation on the handset, whereby the inner stylet is rotated back mitzubewegen the hollow cannula in the same back-looking direction of rotation without. The reason for this is the size of the recess 5, that in particular the spacing of the stop edges 6, 7. During turning of the mandrel 8, the extension 9 runs from a stop edge 7 to the other stop edge 6 without enabling the cannula 1 into rotary motion.

After the mandrel 8 is completely retracted into the barrel 1, it can be completely removed by longitudinally pulling out from the cannula 1, wherein the cannula 1 can serve as a working channel for other endoscopic surgical procedures.

Preferred materials for stylet and sleeve are stainless steel or biocompatible plastics.

3 shows a longitudinal section through a stylet. 8 The stylet 8 is longitudinally penetrated by a hollow channel nineteenth At the distal end portion of the hollow channel 19 opens into an opening 20, which is distally directed. The proximal end of the hollow channel 19 opens in the shown embodiment in a side opening 21 which is not covered by the pushed over the stylet 8 Hohkanüle. This is also apparent from the fact that the opening 21 is disposed proximal to the pin-like extension. 9 Basically, it is also possible the opening at the proximal end of the stylet 8 position.

Gas-tight and rotatably supported a rotary coupling 23 is provided in the manner of a rubber sleeve around the outer wall of the mandrel 8 in height of the opening 21 in order to ensure a possibility of a gas supply line through the hollow channel nineteenth To the rubber sleeve 23, a supply line is provided, which is connected to a not shown in detail gas supply 22nd

Firstly, the hollow channel 19 is used for insufflation of the interior of the body, on the other hand the gas supply serves in particular for monitoring or control of whether the needle assembly, for example during the Eindringvorganges into the tissue. The abdominal wall has pierced and is located in an intracorporeal cavity. For this purpose, in the gas supply line 24, a pressure sensor in the form of a manometer 25 for example. Provided to which the current prevailing in the hollow channel 19 pressure can be read. As long as the stylet 8 vorarbeitet through tissue, the gas located in the cavity can not escape through the distal opening of the twentieth Once the stylet 8 penetrates in a cavity intrakorpolaren entwicht the gas, whereby the gas pressure drops abruptly. This pressure drop, the surgeon can observe on the pressure gauge 25 and knows that he has, for example, completely punctured. The abdominal wall.

In Figure 4 a and b, an alternative embodiment to that shown in Figures 1 a, b cannula illustrated is shown with stylet.

In contrast to the embodiment according to Fig. 1 a, the proximal end of the hollow cannula 1 has an internal thread 26 protrudes 9 of the mandrel 8 in the thread contour of the pin extension as soon as the stylet 8 is sufficiently proximal end pushed into the hollow needle 1. The thread contour serves the same purpose as the inclined portion S and the stop edges 6, 7 in the embodiment according to FIG. 1

The stylet 8 has in accordance with Figure 4 b on a distal tapered cutting thread 27, which according to the difference in the screw thread. 11 Fig. 1 b provides a linearly formed, extending with a pitch thread contour 28 which terminates in a tip 29, which itself is not arranged centrally with respect to Mandrinlängsachse but facing to Mandrinlängsachse oriented. By this, facing to Mandrinlängsachse tip formation is ensured that the intrusion of the tip of the stylet 8 eg. Through a skin layer easier, ie takes place in self-tapping manner and without exerting a large contact pressure on the skin layer to be penetrated.

The tip 29 may be made of the same material as the stylet 8 itself, eg. Teflon. However, better cutting effects can be obtained when the tip is made of a cutting steel or a similar hard material such as diamond.

LIST OF REFERENCE NUMBERS

hollow cannula

screw thread

outer wall

cannula edge

Recess 7 stop edges

mandrin

Pin-like extension 0 Conical screw tip 1 2 3 sawtooth sharp edge 4 rotating shaft 5 rotation unit 6 Bore

Toggle switch 8 Battery cover 9 hollow channel opening 0.21

Gas supply 3 rotary coupling

Supply line 5 pressure sensor 6 female thread

cutting thread

thread contour

top

Claims

claims
1. The cannula assembly for introduction of endoscopic instruments into a human or animal body with a hollow cannula (1) forming a passageway in intrakorpulare areas after penetration of the skin layers, and with a stylet (8), which can be inserted into the hollow cannula (1), characterized in that the hollow cannula (1) has an outer wall (3) with a coaxially to the cannula longitudinal axis helically revolving screws contour, and that the penetration of the hollow needle (1) is formed through the skin layers of the stylet (8) as geradzylinderförmiger stylet having an outer contour which is adapted to the inner contour of the hollow cannula (1) such that the stylet (8) in register in the hollow cannula (1) is slidable, and a distal Enbereich having a tip (10) which is inscribed on a cone and extends from the tip of the proximal helical screw thread (11).
2. The cannula assembly according to claim 1, characterized in that the screw thread (11) has a sawtooth-shaped cross-section with a longitudinal axis extending obliquely to the cannula and a substantially perpendicular to the cannula longitudinal axis face portion (12, 13).
3. The cannula assembly according to claim 1 or 2, characterized in that the screw thread (11) gradually merges into the geradzylinderförmige outer contour at the transition between the conical distal end portion and the geradzylinderförmig designed region of the stylet.
4. The cannula assembly according to any one of claims 1 to 3, characterized in that the hollow cannula (1) having a distal and a proximal end that the distal-end as a circular cannula edge (4) is formed and extends in a plane perpendicular to the cannula longitudinal axis that the helical contour ends directly to the cannula edge (4).
5. The cannula assembly according to any one of claims 1 to 4, characterized in that the hollow needle (1) is constructed as a straight hollow cylinder having a constant inner diameter.
6. The cannula assembly according to claim 4 or 5, characterized in that the hollow cannula (1), in the region of the cannula edge (4) has a decreasing in the direction of the distal end outer diameter at a constant inner diameter so that the cannula wall thickness with the exception of the helical contour on the cannula edge to a minimum.
7. The cannula assembly according to any one of claims 1 to 6, characterized in that the hollow cannula (1) and / or the stylet (8) of plastic or metal material, preferably Teflon is made.
8. The cannula assembly according to any one of claims 1 to 6, characterized in that at least the screw thread (11) in the entire area of ​​the tapered distal tip (10) of the stylet (8) has a thread contour through which the stylet solely by rotational movement within of biological tissue undergoes a forward axial movement.
9. The cannula assembly according to any one of claims 1 to 8, characterized in that at the proximal end of the stylet (8) is provided an the outer contour of the stylet (8) superior pin-like extension (9) in a corresponding recess (5) at the proximal engages the end of the hollow cannula (1), so that upon rotation of the stylet (8), the rotary motion to the hollow needle (1) is transferable.
10. The cannula assembly of any one of claims 1 to 9, characterized in that the stylet (8) has a length, wherein the conical tip (10) of the stylet (8) is completely up to the transition to the geradzylinderförmigen area of ​​the hollow cannula (1) is about as long as the pin-like extension (9) is engaged with the recess (5) at the proximal end of the hollow cannula (1).
11. The cannula assembly of claim 9 or 10, characterized in that the recess (5) at the proximal end of the hollow cannula (1) is large enough so that a free-wheeling of the pin-like extension (9) in such a way within the recess (5) is possible, that the stylet (8) from a fully, with its conical tip (10) of the hollow cannula (1) extended position retracted into a largely with its tip in the interior of the hollow cannula (1) position without rotation of the hollow cannula (1) is movable ,
12. The cannula assembly of any one of claims 9 to 11, characterized in that the recess (5) by two spaced abutment edges (6, 7) is limited, with which the pin-like projection (9) enters into operative connection.
13. The cannula assembly of any one of claims 1 to 12, characterized in that the stylet (8) has a Steckverbindungsflansch at its proximal end through which the stylet (8) with a motor-driven rotating unit (15) is releasably connectable.
14. The cannula assembly according to claim 13, characterized in that the rotary unit (15) having a clockwise and counterclockwise rotation.
15. The cannula assembly of any one of claims 1 to 14, characterized in that the distal tip of the stylet (8) is sharp-edged or rounded.
16. The cannula assembly of any one of claims 1 to 15, characterized in that the screw thread (11) at the distal end portion of the stylet (8) and on the hollow cannula (1) helically encircling helical contour (2) at the transition between stylet (8) and hollow cannula (1) through a skin layer by means of rotation about the Kanülenlängsache, aligned with each other in the state of a joint intrusion.
17. The cannula assembly of any one of claims 1 to 16, characterized in that the stylet (8) has a hollow channel (19) with at least two openings (20, 21), of which an opening (20) in the distal, conical portion ( 10) of the stylet (8) and another opening (21) at proximlaseitigen portion of the stylet (8) are provided.
18. The cannula assembly according to claim 17, characterized in that the proximal Inappropriate opening (21) to a gas supply (22) by means of rotary coupling (23) is connected.
19. The cannula assembly according to claim 18, characterized in that the rotary coupling (23) comprises a rotatable and gas-tight manner on the outside wall of the mandrel (8) is fitting sleeve which via a feed line (24) is connected to the gas supply (22).
20. The cannula assembly of claim 18 or 19, characterized in that the gas supply (22) with a pressure sensor (25) is connected, the gas pressure in the through the stylet (8) extending hollow channel (19) measures.
21. The cannula assembly of any one of claims 1 to 20, characterized in that within the hollow cannula (1) a valve arrangement is provided which prevents Auströmen of gas from inside the body to the outside, after removal of the stylet (8) of the hollow cannula (1) ,
22. The cannula assembly of any one of claims 1 to 21, characterized in that at least the distal tip of the stylet of a hard material, preferably metal, is made.
PCT/EP2000/007242 1999-07-30 2000-07-27 Cannula system for introducing endoscopic tools in a human or animal body WO2001008572A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19935976.8 1999-07-30
DE1999135976 DE19935976A1 (en) 1999-11-16 1999-07-30 Cannula arrangement for introducing endoscopic instruments into human or ani-mal body comprises a cannula with an external helical thread, and a closely fitting shaft with a conical, helically threaded front end

Publications (1)

Publication Number Publication Date
WO2001008572A1 true true WO2001008572A1 (en) 2001-02-08

Family

ID=7916671

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/007242 WO2001008572A1 (en) 1999-07-30 2000-07-27 Cannula system for introducing endoscopic tools in a human or animal body

Country Status (1)

Country Link
WO (1) WO2001008572A1 (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002076312A2 (en) * 2001-03-14 2002-10-03 Power Medical Interventions, Inc. Trocar device
WO2006093976A1 (en) 2005-02-28 2006-09-08 Spirus Medical Inc. Rotate-to-advance catheterization system
US7780650B2 (en) 2005-05-04 2010-08-24 Spirus Medical, Inc. Rotate-to-advance catheterization system
US7874981B2 (en) 2002-07-31 2011-01-25 Tyco Healthcare Group Lp Orifice introducer device
US7905897B2 (en) 2001-03-14 2011-03-15 Tyco Healthcare Group Lp Trocar device
US8740932B2 (en) 2001-11-30 2014-06-03 Covidien Lp Surgical device
US8858589B2 (en) 2002-01-08 2014-10-14 Covidien Lp Surgical device
US8870755B2 (en) 2007-05-18 2014-10-28 Olympus Endo Technology America Inc. Rotate-to-advance catheterization system
US9017371B2 (en) 2007-09-21 2015-04-28 Covidien Lp Surgical device having multiple drivers
US9033868B2 (en) 1999-06-02 2015-05-19 Covidien Lp Couplings for interconnecting components of an electro-mechanical surgical device
US9113878B2 (en) 2002-01-08 2015-08-25 Covidien Lp Pinion clip for right angle linear cutter
US9113847B2 (en) 1999-06-02 2015-08-25 Covidien Lp Electro-mechanical surgical device
US9204877B2 (en) 2007-09-21 2015-12-08 Covidien Lp Surgical device having a rotatable jaw portion
US9861362B2 (en) 2002-06-14 2018-01-09 Covidien Lp Surgical device
US9867523B2 (en) 2002-01-30 2018-01-16 Covidien Lp Surgical imaging device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5147376A (en) * 1990-05-04 1992-09-15 Francesco Pianetti Trocar needle laparoscopy with a threaded truncated cone bit
US5258003A (en) * 1992-06-01 1993-11-02 Conmed Corporation Method and apparatus for induction of pneumoperitoneum
WO1995020358A1 (en) * 1994-01-26 1995-08-03 Kieturakis Maciej J Instrument and method for incising into body
DE29611170U1 (en) * 1995-08-23 1996-09-05 Golser Karl Dr Working cannula for arthroscopy
US5662673A (en) * 1995-04-05 1997-09-02 Kieturakis; Maciej J. Surgical trocar and method for placing a trocar sleeve in a body wall

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5147376A (en) * 1990-05-04 1992-09-15 Francesco Pianetti Trocar needle laparoscopy with a threaded truncated cone bit
US5258003A (en) * 1992-06-01 1993-11-02 Conmed Corporation Method and apparatus for induction of pneumoperitoneum
WO1995020358A1 (en) * 1994-01-26 1995-08-03 Kieturakis Maciej J Instrument and method for incising into body
US5662673A (en) * 1995-04-05 1997-09-02 Kieturakis; Maciej J. Surgical trocar and method for placing a trocar sleeve in a body wall
DE29611170U1 (en) * 1995-08-23 1996-09-05 Golser Karl Dr Working cannula for arthroscopy

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9364200B2 (en) 1999-06-02 2016-06-14 Covidien Lp Electro-mechanical surgical device
US9113847B2 (en) 1999-06-02 2015-08-25 Covidien Lp Electro-mechanical surgical device
US9033868B2 (en) 1999-06-02 2015-05-19 Covidien Lp Couplings for interconnecting components of an electro-mechanical surgical device
US9078654B2 (en) 1999-06-02 2015-07-14 Covidien Lp Surgical device
WO2002076312A2 (en) * 2001-03-14 2002-10-03 Power Medical Interventions, Inc. Trocar device
WO2002076312A3 (en) * 2001-03-14 2002-11-14 Power Med Interventions Inc Trocar device
US9055971B2 (en) 2001-03-14 2015-06-16 Covidien Lp Trocar device
US7905897B2 (en) 2001-03-14 2011-03-15 Tyco Healthcare Group Lp Trocar device
US8740932B2 (en) 2001-11-30 2014-06-03 Covidien Lp Surgical device
US8858589B2 (en) 2002-01-08 2014-10-14 Covidien Lp Surgical device
US9113878B2 (en) 2002-01-08 2015-08-25 Covidien Lp Pinion clip for right angle linear cutter
US9867523B2 (en) 2002-01-30 2018-01-16 Covidien Lp Surgical imaging device
US9861362B2 (en) 2002-06-14 2018-01-09 Covidien Lp Surgical device
US7874981B2 (en) 2002-07-31 2011-01-25 Tyco Healthcare Group Lp Orifice introducer device
US9554824B2 (en) 2002-07-31 2017-01-31 Covidien Lp Orifice introducer device
EP1861133A1 (en) * 2005-02-28 2007-12-05 Spirus Medical Inc. Rotate-to-advance catheterization system
WO2006093976A1 (en) 2005-02-28 2006-09-08 Spirus Medical Inc. Rotate-to-advance catheterization system
EP1861133A4 (en) * 2005-02-28 2009-04-29 Spirus Medical Inc Rotate-to-advance catheterization system
US7780650B2 (en) 2005-05-04 2010-08-24 Spirus Medical, Inc. Rotate-to-advance catheterization system
US8870755B2 (en) 2007-05-18 2014-10-28 Olympus Endo Technology America Inc. Rotate-to-advance catheterization system
US9204877B2 (en) 2007-09-21 2015-12-08 Covidien Lp Surgical device having a rotatable jaw portion
US9282961B2 (en) 2007-09-21 2016-03-15 Covidien Lp Surgical device having multiple drivers
US9017371B2 (en) 2007-09-21 2015-04-28 Covidien Lp Surgical device having multiple drivers

Similar Documents

Publication Publication Date Title
US3630192A (en) Instrument for internal organ biopsy
US3628524A (en) Biopsy needle
US5183465A (en) Apparatus for supporting and moving needles and trocars for penetrating the abdomen
US5324300A (en) Device for the controlled excision of tissue from a living body
US5474565A (en) Endoscopic suturing needle
US5984939A (en) Multifunctional grasping instrument with cutting member and operating channel for use in endoscopic and non-endoscopic procedures
US6827725B2 (en) Surgical instrument
US5556411A (en) Trocar assembly having a cannula retaining member
US5690663A (en) Safety trocar
US5984919A (en) Surgical trocar
US5925044A (en) Trocar for laparoscopic operations
US7591790B2 (en) Micro-invasive device
US2919692A (en) Vertebral trephine biopsy instruments
US3893445A (en) Bone marrow biopsy instrument
US5693071A (en) Tapered surgical needles and surgical incision members
US20030225344A1 (en) Apparatus and method to access the bone marrow for oncology and stem cell applications
US5591191A (en) Surgical instrument and method for helically incising a pathway into the interior of the body
US20040167428A1 (en) Biopsy device with inner cutting member
US20080234602A1 (en) Biological unit removal tools with retention mechanism
US4306570A (en) Counter rotating biopsy needle
US5195954A (en) Apparatus for the removal of deposits in vessels and organs of animals
US6572632B2 (en) Instrument for cutting biological and notably human tissue
US5406940A (en) Medical instrument for creating a tissue canal
US20050209624A1 (en) Scissors for piercing and cutting anatomical vessels
US5314417A (en) Safety trocar

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AL AM AT AU AZ BA BB BG BR BY CA CH CN CR CU CZ DE DK DM EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE

121 Ep: the epo has been informed by wipo that ep was designated in this application
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase in:

Ref country code: JP