WO1991001773A1 - Percutaneous mechanical dilating catheter for cardiac valves and blood vessels - Google Patents
Percutaneous mechanical dilating catheter for cardiac valves and blood vessels Download PDFInfo
- Publication number
- WO1991001773A1 WO1991001773A1 PCT/IT1990/000072 IT9000072W WO9101773A1 WO 1991001773 A1 WO1991001773 A1 WO 1991001773A1 IT 9000072 W IT9000072 W IT 9000072W WO 9101773 A1 WO9101773 A1 WO 9101773A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- blood vessels
- cardiac valves
- dilating
- dilating catheter
- catheter
- Prior art date
Links
Classifications
-
- 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
- A61M29/00—Dilators with or without means for introducing media, e.g. remedies
- A61M29/02—Dilators made of swellable material
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00743—Type of operation; Specification of treatment sites
- A61B2017/00778—Operations on blood vessels
- A61B2017/00783—Valvuloplasty
Definitions
- serio ⁇ _s hypotension with cerebral ischemia which occurs when the balloon is fully inflated and temporarily obstructs the flow of blood inside the valve undergoing dilation.
- the second is the onset of cardiac valve insufficiency, which ag ⁇ ravates the original illness and necessitates valve transplantation within a fairly short timescale. This is due to the fact that the balloon must be inflated to its maximum capacity relatively quickly, in addition to the fact that it can only assume one shape regardless of the type of valve involved.
- a third drciwback is the damage that can be caused by a balloon larger in diameter that the valve ring or the stenotic blood vessel being treated.
- Yet another drawback is the instability of the balloon within stenotic valves. It can slip on the surface of such structures, producing little or no dilation.
- the aim of the percutaneous mechanical dilating catheter is to eliminate the serious drawbacks mentioned above. This new catheter solves the problem of how to d: : late stenotic cardiac valves and blood vessels.
- This catheter is undoubtedly an improvement on the existing balloon catheter for the following reasons; a) unlike the balloon catheter, it allows an improved flew of blood during the process of dilation itself,thus avoiding the risk of serious systemic hypotension and ischemia. b) the new catheter allows the dilating body to be positioned in the most anatomically favourable way inside the stenotic valve or vessel. c) the cardiologist can regulate the dimensions of the body as required during the procedure. d) the dilation prccedure can be carried cut in a much less traumatic manner without limitations of time and with maximuir accuracy of pressure on the stenotic valve cusps and blood vessels. e) the body of the new catheter can be firmly anchored to the edges of stenotic valves and to the stenotic segments of blood vessels.
- Fig. 1 shows the percutaneous mechanical dilating catheter. It comprises four parts; the handle, the sheath, the wire, and the dilating body.
- the diagram shows the catheter in the act of dilation.
- the handle 1 is pistol-shaped and is fur ⁇ i- shed with a lever 2. This transmits ccminands via a wire 5 to open and close the dilating body.
- At the bottom (lower extremity) of the handle there is a screw to regulate expansion 3.
- the flexible sheath 4 has a lenght and diameter which can be adjusted to suit the age and the surface area of the patient.
- the wire runs through the sheath and is attached at one end to the handle and at the other to a head 7 of the body.
- the body which is shown in the act of dilation, is made up as follows
- the two heads 6, 7 are located at each extremity of the body.
- Each, head has three sites for the expansion blades 8,
- the proximal head 6 has a hole for the wire 5;
- the distal head 7 has an anchor point for the wire 5.
- Each of the heads is fitted with a tube 9, 10 which fit into each other and serve to regulate the movement of the heads.
- the wire runs through these tubes.
- At the end of the body there is a flexible guide 11 attached to the he ⁇ d 7.
Abstract
This invention is a mechanical dilating catheter that serves to dilate stenotic cardiac valves and blood vessels. It is composed of four parts: 1) the handle (1); 2) the sheath (4); 3) the wire (5); 4) the dilating body. This has a concave area (12) in the central section of the expansion blades (8) which firmly anchors the body to the edges of stenotic cardiac valves and to stenotic segments of blood vessels.
Description
Percutaneous mechanical dilating catheter for cardiac valves and blood vessels.
Great progress has been made in interventional cardiology over the last decade. The therapeutic use of balloon catheters has been extended to stenotic cardiac valves with the aim of increasing the flow of blood by dilating the valve. However, balloon catheters have certain limitations. This is due partly to their structure and conformation and partly to the fact that they cεn have a dilating effect on the valve only at the moment of maximum inflation of the balloon. Below, we outline some of the most common drawbacks associated with this type of catheter.
The first of these is serioι_s hypotension with cerebral ischemia which occurs when the balloon is fully inflated and temporarily obstructs the flow of blood inside the valve undergoing dilation.
The second is the onset of cardiac valve insufficiency, which agσravates the original illness and necessitates valve transplantation within a fairly short timescale. This is due to the fact that the balloon must be inflated to its maximum capacity relatively quickly, in addition to the fact that it can only assume one shape regardless of the type of valve involved. A third drciwback is the damage that can be caused by a balloon larger in diameter that the valve ring or the stenotic blood vessel being treated. Yet another drawback is the instability of the balloon within stenotic valves. It can slip on the surface of such structures, producing little or no dilation.
The aim of the percutaneous mechanical dilating catheter is to eliminate the serious drawbacks mentioned above. This new catheter solves the problem of how to d::late stenotic cardiac valves and blood vessels.
This catheter is undoubtedly an improvement on the existing balloon catheter for the following reasons; a) unlike the balloon catheter, it allows an improved flew of blood during the process of dilation itself,thus avoiding the risk of serious systemic hypotension and ischemia. b) the new catheter allows the dilating body to be positioned in the most anatomically favourable way inside the stenotic valve or vessel. c) the cardiologist can regulate the dimensions of the body as required during the procedure. d) the dilation prccedure can be carried cut in a much less traumatic manner without limitations of time and with maximuir accuracy of pressure on the stenotic valve cusps and blood vessels. e) the body of the new catheter can be firmly anchored to the edges of stenotic valves and to the stenotic segments of blood vessels.
From observation obtained during experiments on dead sub-- jects, the inventors deduced that only the concavity on the central section of the expansion blades allows to firmly anchor the dilating body tc the edges of stenotic valves and to the tracts of blood vessels. Used in vivo without a firm anchorage, the dilating body would frequently lose contact with the stenotic structure, possibly providing little or no dilatinc effect.
DESCRIPTION
Fig. 1 shows the percutaneous mechanical dilating catheter. It comprises four parts; the handle, the sheath, the wire, and the dilating body. The diagram shows the catheter in the act of dilation. The handle 1 is pistol-shaped and is furπi- shed with a lever 2. This transmits ccminands via a wire 5 to open and close the dilating body. At the bottom (lower extremity) of the handle there is a screw to regulate expansion 3. The flexible sheath 4 has a lenght and diameter which can be adjusted to suit the age and the surface area of the patient. The wire runs through the sheath and is attached at one end to the handle and at the other to a head 7 of the body. One end of the sheath is connected to the handle and the other to a head 6 of the body. The body, which is shown in the act of dilation, is made up as follows The two heads 6, 7 are located at each extremity of the body. Each, head has three sites for the expansion blades 8, The proximal head 6 has a hole for the wire 5; the distal head 7 has an anchor point for the wire 5. Each of the heads is fitted with a tube 9, 10 which fit into each other and serve to regulate the movement of the heads. The wire runs through these tubes. At the end of the body there is a flexible guide 11 attached to the heεd 7. There is a concave area 12 located in the central section of the expansion blades 8.
- A -
MODE OF EMPLOYMENT
Pressure applied on the lever 2 modifies the position of the wire. This brings the two heads closer together, thus opening (flexing) the three blades. During this expansion, the blades come into contact with stenotic valves or blood vessels, which they then dilate as required. After dilation, the pressure on the heads is released allowing the body to return to its initial closed position.
Claims
1. the "Percutaneous mechanical dilating catheter for • cardiac valves and blood vessels" characterized by being composed of four parts; a handle, a sheath, a wire, a dilating bod .
2. the "Percutaneous mechanical dilating catheter for cardiac valves and blood vessels", as preceding, having a dilating body.
3. the "Percutaneous mechanical dilating catheter for cardiac valves and blood vessels", as preceding, having a dilating body preferably made of stainless steel, but not excluding any other suitable material.
4. the "Percutaneous mechanical dilating catheter for cardiac valves and blood vessels", as preceding, having a dilating body comprising three flexible, elastic blades 8 preferably made of stainless steel, but not excluding any other suitable material.
5. the "Percutaneous mechanical dilating catheter for cardiac valves and blood vessels", as preceding, of which the blades 8 have a convave area 12.
6. the "Percutaneous mechanical dilating catheter for cardiac valves and blocd vessels", as preceding, of which the concave area 12 is located in the central section of the blades 8.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT3591589U IT218004Z2 (en) | 1989-08-01 | 1989-08-01 | PERCUTANEOUS MECHANICAL DILATOR CATHETER FOR HEART VALVES BLOOD CIRCULATION VESSELS |
IT35915B/89 | 1989-08-01 | ||
IT47824A/90 | 1990-04-03 | ||
IT47824A IT1239629B (en) | 1990-04-03 | 1990-04-03 | Percutaneous mechanical dilating catheter |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1991001773A1 true WO1991001773A1 (en) | 1991-02-21 |
Family
ID=26329021
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IT1990/000072 WO1991001773A1 (en) | 1989-08-01 | 1990-07-26 | Percutaneous mechanical dilating catheter for cardiac valves and blood vessels |
Country Status (2)
Country | Link |
---|---|
AU (1) | AU6042690A (en) |
WO (1) | WO1991001773A1 (en) |
Cited By (52)
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GB2257631A (en) * | 1991-05-23 | 1993-01-20 | Christopher John Newman | Artery expander |
EP0643980A1 (en) * | 1993-09-21 | 1995-03-22 | United States Surgical Corporation | Surgical instrument for expanding body tissue |
DE19610461A1 (en) * | 1996-03-16 | 1997-09-18 | Osypka Peter | Catheter with spreader section |
WO1999023961A1 (en) * | 1997-11-12 | 1999-05-20 | Vnus Medical Technologies, Inc. | Catheter having expandable electrodes and adjustable stent |
WO1999042044A1 (en) * | 1998-02-19 | 1999-08-26 | Conway-Stuart Medical, Inc. | Electrosurgical sphincter treatment apparatus |
WO1999044522A1 (en) * | 1998-03-06 | 1999-09-10 | Conway-Stuart Medical, Inc. | Apparatus to electrosurgically treat esophageal sphincters |
WO1999055245A1 (en) * | 1998-04-30 | 1999-11-04 | Edwards Stuart D | Electrosurgical sphincter treatment apparatus |
WO2008005405A2 (en) * | 2006-06-28 | 2008-01-10 | Lemaitre Vascular, Inc. | Non-occluding dilation device |
WO2008156468A1 (en) * | 2007-06-19 | 2008-12-24 | Lemaitre Vascular, Inc. | Non-occluding dilation device |
US7618432B2 (en) | 2003-07-18 | 2009-11-17 | Intervalve, Inc. | Valvuloplasty devices and methods |
US7951111B2 (en) | 2008-10-10 | 2011-05-31 | Intervalve, Inc. | Valvuloplasty catheter and methods |
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US8740846B2 (en) | 1996-09-20 | 2014-06-03 | Verathon, Inc. | Treatment of tissue in sphincters, sinuses, and orifices |
US8784467B2 (en) | 2009-05-15 | 2014-07-22 | Lemaitre Vascular, Inc. | Non-occlusive dilation devices |
US8845632B2 (en) | 2000-05-18 | 2014-09-30 | Mederi Therapeutics, Inc. | Graphical user interface for monitoring and controlling use of medical devices |
CN104470414A (en) * | 2012-06-22 | 2015-03-25 | 迈克罗普拉塔公司 | Multi-lumen-catheter retractor system for a minimally-invasive, operative gastrointestinal treatment |
US9023031B2 (en) | 1997-08-13 | 2015-05-05 | Verathon Inc. | Noninvasive devices, methods, and systems for modifying tissues |
US9039699B2 (en) | 1999-11-16 | 2015-05-26 | Covidien Lp | Methods and systems for treatment of tissue in a body lumen |
US9155583B2 (en) | 1994-06-24 | 2015-10-13 | Mederi Therapeutics, Inc. | Systems and methods for monitoring and controlling use of medical devices |
US9179970B2 (en) | 2005-11-23 | 2015-11-10 | Covidien Lp | Precision ablating method |
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US9242081B2 (en) | 2010-09-13 | 2016-01-26 | Intervalve, Inc. | Positionable valvuloplasty catheter |
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US9661984B2 (en) | 2004-03-16 | 2017-05-30 | Macroplata, Inc. | Endoluminal treatment method and associated surgical assembly |
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US10386990B2 (en) | 2009-09-22 | 2019-08-20 | Mederi Rf, Llc | Systems and methods for treating tissue with radiofrequency energy |
US10517580B2 (en) | 2009-12-16 | 2019-12-31 | Boston Scientific Scimed, Inc. | Multi-lumen-catheter retractor system for a minimally invasive, operative gastrointestinal treatment |
US10531869B2 (en) | 2009-12-16 | 2020-01-14 | Boston Scientific Scimed, Inc. | Tissue retractor for minimally invasive surgery |
US10595711B2 (en) | 2009-12-16 | 2020-03-24 | Boston Scientific Scimed, Inc. | System for a minimally-invasive, operative gastrointestinal treatment |
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DE1963316A1 (en) * | 1969-12-17 | 1971-06-24 | Inst Serdetschno Sosudistoi Ch | Dilator for precardial mitral and tricuspid commissurotomy |
US4648402A (en) * | 1985-10-03 | 1987-03-10 | Santos Manuel V | Blood vessel dilating surgical instrument |
-
1990
- 1990-07-26 AU AU60426/90A patent/AU6042690A/en not_active Abandoned
- 1990-07-26 WO PCT/IT1990/000072 patent/WO1991001773A1/en unknown
Patent Citations (4)
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US1677671A (en) * | 1926-07-02 | 1928-07-17 | Wilford A Councill | Ureteral stone extractor and dilator |
US3517128A (en) * | 1968-02-08 | 1970-06-23 | James R Hines | Surgical expanding arm dilator |
DE1963316A1 (en) * | 1969-12-17 | 1971-06-24 | Inst Serdetschno Sosudistoi Ch | Dilator for precardial mitral and tricuspid commissurotomy |
US4648402A (en) * | 1985-10-03 | 1987-03-10 | Santos Manuel V | Blood vessel dilating surgical instrument |
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GB2257631A (en) * | 1991-05-23 | 1993-01-20 | Christopher John Newman | Artery expander |
EP0643980A1 (en) * | 1993-09-21 | 1995-03-22 | United States Surgical Corporation | Surgical instrument for expanding body tissue |
US5522835A (en) * | 1993-09-21 | 1996-06-04 | United States Surgical Corporation | Surgical instrument for expanding body tissue |
US5720763A (en) * | 1993-09-21 | 1998-02-24 | United States Surgical Corporation | Surgical instrument for expanding body tissue |
US5928259A (en) * | 1993-09-21 | 1999-07-27 | United States Surgical Corporation | Surgical instrument for expanding body tissue |
US9155583B2 (en) | 1994-06-24 | 2015-10-13 | Mederi Therapeutics, Inc. | Systems and methods for monitoring and controlling use of medical devices |
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US5954742A (en) * | 1996-03-16 | 1999-09-21 | Osypka; Peter | Dilatation catheter |
US8740846B2 (en) | 1996-09-20 | 2014-06-03 | Verathon, Inc. | Treatment of tissue in sphincters, sinuses, and orifices |
US9023031B2 (en) | 1997-08-13 | 2015-05-05 | Verathon Inc. | Noninvasive devices, methods, and systems for modifying tissues |
US6263248B1 (en) | 1997-11-12 | 2001-07-17 | Vnus Medical Technologies, Inc. | Catheter having expandable electrodes and adjustable stent |
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