WO1999051140A2 - A cannula of changeable length and shape - Google Patents
A cannula of changeable length and shape Download PDFInfo
- Publication number
- WO1999051140A2 WO1999051140A2 PCT/BG1999/000005 BG9900005W WO9951140A2 WO 1999051140 A2 WO1999051140 A2 WO 1999051140A2 BG 9900005 W BG9900005 W BG 9900005W WO 9951140 A2 WO9951140 A2 WO 9951140A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cannula
- endoscope
- bands
- during
- spiral
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00064—Constructional details of the endoscope body
- A61B1/00071—Insertion part of the endoscope body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00147—Holding or positioning arrangements
- A61B1/00154—Holding or positioning arrangements using guiding arrangements for insertion
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/005—Flexible endoscopes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES 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
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
- A61M25/0116—Steering means as part of the catheter or advancing means; Markers for positioning self-propelled, e.g. autonomous robots
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES 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
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/0105—Steering means as part of the catheter or advancing means; Markers for positioning
Definitions
- the invention refers to a cannula of changeable length and shape, which can be used in medical application during the penetration of various devices, e.g. endoscopes, into the living systems as well as other activities, which necessitate the penetration into a medium, vulnerable to mechanical intervention and/or is without well-shaped confining walls.
- various devices e.g. endoscopes
- tubes, tubular elements (1-7) and devices e.g. endoscopes, including tubes and tubular elements (8, 9), which are characterised by the fact that after penetrating into the body along the existing lumens - oesophagus, blood vessels, etc. - they ensure some protection from mechanical traumas to the surrounding tissues during the operation of the devices.
- a disadvantage of the existing tubes, tubular elements and devices containing tubes and tubular elements is the fact that during their penetration into the living system as well as during their removal, they cause considerable traumas due to the friction between their outside surface and the medium of penetration and particularly to the side pressure exerted by the sections where there are curves.
- the aim of the invention is to create a cannula of changeable length and shape, which is to penetrate the living system not only through existing orifices and which is to reduce to a minimum the traumas to the surrounding medium e.g. the human body.
- the task is solved by a device in which the cannula is formed at entering the working medium only through lengthening, which enters the working medium only through lengthening the front end, which takes the turns in any direction only through growing in the same direction and which is taken out of the surrounding medium only through shortening of the front end, keeping stable all the time in respect to the medium and keeping its shape.
- a cannula 1 has been created, built up of spirally wound one or more bands
- the cannula is constructed.
- head 4 which encircles the front end of the cannula 1, which is used to reduce to a minimum the traumatising of the surrounding medium during its elongation or shortening.
- side openings through which the bands 2 pass from the channels 5 into the endoscope 3 to the cannula walls and vice versa.
- the change in the cannula length is affected by rotating the endoscope 3 or only its external concentric part, in which are located channels, simultaneously with co-ordinated penetration end removal of the endoscope 3, whereas the linear movement of the endoscope 3 per one revolution of the rotation is equal to the change in the cannula length 1 in the direction of the endoscope movement.
- the elongation of the cannula 1 is achieved by rotating the endoscope 3 or it external concentric part, in which the channels are located, in the direction of winding the spiral.
- the bands 2 in the channels 5, in the direction of the endoscope end 3, is affected under the impact of being pushed receiving an impulse at the front end of the endoscope 3, outside the surrounding medium, or they are pulled by sections of bands 2 winding upon the cannula 1 , because of being fixed to the cannula walls by the forces of their interaction with the bend sections wound before that.
- the shortening of the cannula 1 is achieved by rotating the endoscope 3 or only its exterior concentric part in the opposite direction and pulling the bands 2 in the direction of the beginning of the endoscope 3 and the cannula 1 , whereby the bands 2 unwind front the spiral of the cannula 1 .
- the shape of the cannula 1 is changed by lengthening along the line of a turn in the desired direction, while the overlapping of the bands 2 forming the cannula 1 from the external side of the turn is smaller than their overlapping from the internal side of the turn.
- the advantages of the described cannula 1 are:
- the cannula 1 is static in respect to the surrounding medium with the exception of its end section, which can lengthen and shorten and thus the friction with this medium is eliminated, both of the cannula 1 itself and the endoscope inserted in it 3.
- the cannula 1 has a stable shape i.e. it is comparatively hard and that is why at the turns the cannula and the endoscope placed in it do not press laterally the surrounding medium.
- the described cannula 1 does not traumatise the surrounding medium either by longitudinal friction, or by lateral pressing except at the moment and in the place of its elongation and respectively shortening.
- Example 1 A cannula 1 of changing length and shape, shown in fig. 1 and 2, built up of spirally wound band, the overlapping sections of which are linked by magnetic forces, while the unlinked section of the band in the cannula wall passes from the spiral into the interior of the cannula.
- the free part of the band is located along the length of a guiding channel 5, included in the mass of the device, for whose penetration in the surrounding medium the cannula is designed, e.g. In the endoscope 3 ending with a head 4.
- the band 2 is a constant magnet with direction the axis of the poles, north-south, perpendicular to the axis of the band.
- the elongation of the cannula is selected by rotating the endoscope in the direction of the winding of the spiral, which is combined with pushing the band of the guiding channel 5 of the endoscope towards the cannula end and respectively the endoscope head, and at the same time for each revolution of rotation the endoscope moves in the direction of the cannula elongation with a length equal to the elongation of the cannula for the same revolution.
- the shortening of the cannula is effected by rotating the endoscope in the direction of unwinding the spiral, combined with pulling the band in the guiding channel towards the beginning of the cannula and the endoscope and taking out the endoscope with a length equal to the shortening of the cannula for the same revolution.
- the shape of the cannula is changed during its elongation by forming turns as the endoscope head bends in the direction of the turn whereas the overlapping of the separate section of the band in the coils of the spiral is smaller from the external side of the turn than from its internal size.
- Example 2 A cannula 1, shown in figures 3 and 4, similar to Example 1, which is built up by the combined winding of two concentrically situated spirals of two bands 2 and 2', in which one band 2' forms the internal spiral, overlaps simultaneously with its width half of the widths of two coil of the band 2, forming the external spiral. Separately in each of the two concentric spirals, located over each other, coils as a rule do not overlap. But such overlapping can be obtained from the internal side of a turn in the cannula.
- Example 3 A cannula 1, shown in fig. 5, similar to the cannula in Example 1, in which the endoscope 3 is divided into two concentrically located parts - interior 3 and exterior 3', the guiding channels is located in the mass and along the length of the external part of the endoscope 3'. This allows, during the change of the length and the shape of the cannula, the rotation only of the external part 3' of the endoscope, in which is located the guiding channel 5, while the interior part and the head connected with it does not rotate.
- the endoscope head 4 is connected only with its interior part 3.
- the rotating part of the endoscope 3' can be used for placing e.g. fibrous optics, conducting the light to the object observed by the endoscope, whereat the front part of the head is transparent.
- This cannula is that the rotating movement of the head is avoided and thus the traumatising of the surrounding medium during the penetration of the head into it is reduced to a minimum.
- Patent PF RU 2022518 CI 13.02.91
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- Animal Behavior & Ethology (AREA)
- Heart & Thoracic Surgery (AREA)
- Biophysics (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Pathology (AREA)
- Optics & Photonics (AREA)
- Physics & Mathematics (AREA)
- Radiology & Medical Imaging (AREA)
- Robotics (AREA)
- Pulmonology (AREA)
- Anesthesiology (AREA)
- Hematology (AREA)
- Endoscopes (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99913028A EP1006858A2 (en) | 1998-04-02 | 1999-04-01 | A cannula of changeable length and shape |
AU31329/99A AU3132999A (en) | 1998-04-02 | 1999-04-01 | A cannula of changeable length and shape |
JP54983299A JP2002514130A (en) | 1998-04-02 | 1999-04-01 | Cannula with variable length and shape |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BG102365A BG102365A (en) | 1998-04-02 | 1998-04-02 | Canal with alternating length and form |
BG102365 | 1998-04-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1999051140A2 true WO1999051140A2 (en) | 1999-10-14 |
WO1999051140A3 WO1999051140A3 (en) | 1999-11-18 |
Family
ID=3927409
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/BG1999/000005 WO1999051140A2 (en) | 1998-04-02 | 1999-04-01 | A cannula of changeable length and shape |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1006858A2 (en) |
JP (1) | JP2002514130A (en) |
AU (1) | AU3132999A (en) |
BG (1) | BG102365A (en) |
WO (1) | WO1999051140A2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9918705B2 (en) | 2016-07-07 | 2018-03-20 | Brian Giles | Medical devices with distal control |
US10391274B2 (en) | 2016-07-07 | 2019-08-27 | Brian Giles | Medical device with distal torque control |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2022518C1 (en) | 1991-02-13 | 1994-11-15 | Государственное предприятие "Научно-производственное объединение "Техномаш" | Flexible endoscopic tube |
US5448989A (en) | 1993-02-22 | 1995-09-12 | Richard Wolf Gmbh | Medical instrument shaft capable of positive and non-positive linking of segments |
US5558665A (en) | 1994-06-24 | 1996-09-24 | Archimedes Surgical, Inc. | Surgical instrument and method for intraluminal retraction of an anatomic structure |
US5620408A (en) | 1995-04-14 | 1997-04-15 | Vennes; Jack A. | Endoscopic over-tube |
US5643174A (en) | 1993-08-18 | 1997-07-01 | Sumitomo Bakelite Company Limited | Endoscopic guide tube with embedded coil spring |
US5645520A (en) | 1994-10-12 | 1997-07-08 | Computer Motion, Inc. | Shape memory alloy actuated rod for endoscopic instruments |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3799152A (en) * | 1972-08-21 | 1974-03-26 | S Kim | Flexible and expandable esophagoscope |
FR2481915A1 (en) * | 1980-05-08 | 1981-11-13 | Spehler Remy | Drive mechanism for industrial or medical endoscope - has endless screw over body driven by flexible cable from motor |
US4944287A (en) * | 1988-03-29 | 1990-07-31 | Asahi Kogaku Kogyo K.K. | Flexible tube of endoscope |
JPH05200041A (en) * | 1991-10-04 | 1993-08-10 | Ethicon Inc | Flexible tube for cannula needle |
-
1998
- 1998-04-02 BG BG102365A patent/BG102365A/en unknown
-
1999
- 1999-04-01 EP EP99913028A patent/EP1006858A2/en not_active Withdrawn
- 1999-04-01 JP JP54983299A patent/JP2002514130A/en active Pending
- 1999-04-01 WO PCT/BG1999/000005 patent/WO1999051140A2/en not_active Application Discontinuation
- 1999-04-01 AU AU31329/99A patent/AU3132999A/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2022518C1 (en) | 1991-02-13 | 1994-11-15 | Государственное предприятие "Научно-производственное объединение "Техномаш" | Flexible endoscopic tube |
US5448989A (en) | 1993-02-22 | 1995-09-12 | Richard Wolf Gmbh | Medical instrument shaft capable of positive and non-positive linking of segments |
US5643174A (en) | 1993-08-18 | 1997-07-01 | Sumitomo Bakelite Company Limited | Endoscopic guide tube with embedded coil spring |
US5558665A (en) | 1994-06-24 | 1996-09-24 | Archimedes Surgical, Inc. | Surgical instrument and method for intraluminal retraction of an anatomic structure |
US5645520A (en) | 1994-10-12 | 1997-07-08 | Computer Motion, Inc. | Shape memory alloy actuated rod for endoscopic instruments |
US5620408A (en) | 1995-04-14 | 1997-04-15 | Vennes; Jack A. | Endoscopic over-tube |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9918705B2 (en) | 2016-07-07 | 2018-03-20 | Brian Giles | Medical devices with distal control |
US10391274B2 (en) | 2016-07-07 | 2019-08-27 | Brian Giles | Medical device with distal torque control |
US10786230B2 (en) | 2016-07-07 | 2020-09-29 | Micronovus, Llc | Medical devices with distal control |
US11141141B2 (en) | 2016-07-07 | 2021-10-12 | Micronovus, Llc | Medical devices with distal control |
US11717641B2 (en) | 2016-07-07 | 2023-08-08 | Micronovus, Llc | Medical device with distal torque control |
Also Published As
Publication number | Publication date |
---|---|
EP1006858A2 (en) | 2000-06-14 |
BG102365A (en) | 1999-10-29 |
AU3132999A (en) | 1999-10-25 |
WO1999051140A3 (en) | 1999-11-18 |
JP2002514130A (en) | 2002-05-14 |
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