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US3736939A - Balloon catheter with soluble tip - Google Patents

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Publication number
US3736939A
US3736939A US3736939DA US3736939A US 3736939 A US3736939 A US 3736939A US 3736939D A US3736939D A US 3736939DA US 3736939 A US3736939 A US 3736939A
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Prior art keywords
catheter
drainage
balloon
tip
body
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Expired - Lifetime
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G Taylor
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Kendall Co
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Kendall Co
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    • 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
    • A61M25/0067Catheters; Hollow probes characterised by the distal end, e.g. tips
    • A61M25/0068Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
    • A61M25/0069Tip not integral with tube
    • 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
    • A61M25/10Balloon catheters

Abstract

A flexible retention catheter of the balloon inflation type is provided with an auxiliary drainage opening in the wall of the catheter, situated below the inflation balloon, and with an imperforate tip composed of a material which is soluble in body fluids. During insertion, drainage is initiated only through the auxiliary opening. Upon dissolution of the tip, the whole diameter of the lumen of the catheter becomes available for drainage.

Description

9 1: 1 United StHtES 310111 I 1 1111 3,730,939

Taylor 1 June 5, 1973 541 BALLOON CATHETER WITH 2,603,217 7/1952 McShirley A ..128/239 SOLUBLE TIP 2,936,760 5/1960 Gants a v128 349 B 2,930,377 3/1960 Cowley 1 128/344 Inventor? Glen" Taylor, Barrlngwn 3,428,046 2 1969 Remer et a1. ..128/349 R [73] Assignee: The Kendall Company, Walpole, OTHER PUBLICATIONS Brit. Med1lourn. 25 Feb. 1967 pg. 485 [22] Filed: Jan. 7, I972 [2]] Appl NO: 216,230 Primary Examiner-Dalt0n L. 'lruluck Att0rney.lohn F. Ryan Related US. Application Data [63] Continuation of Ser. No. 1,471, Jan. 8, 1970, aban- [57] ABSTRACT dolled, Continuation-impart of Set A flexible retention catheter of the balloon inflation 221 1970 abandonedtype is provided with an auxiliary drainage opening in the wall of the catheter, situated below the inflation [52] US. Cl. ..I28/349 B, 128/239, 128/246 baummy and with an imperforate tip Composed of a [5 31. Cl. material which is soluble in fluids During insep [58] Flew 3 Search 349 349 tion, drainage is initiated only through the auxiliary B49 350 239 246 opening. Upon dissolution of the tip, the whole diame- References Cited tier of the lumen of the catheter becomes available for rainage. UNITED STATES PATENTS 1 Claim, 1 Drawing Figure 871,474 11/1907 Buckner ..128/239 801,924 10/1905 Shiley ..128/24O BALLOON CATHETER WITH SOLUBLE TIP This is a continuation of application Ser. No. 1,471, filed Jan. 8, 1970, which is a continuation-in-part of U. S. Ser. No. 692,853, filed Dec. 22, 1970, both now abandoned.

This invention relates to surgical retention catheters, and more particularly to catheters provided with an imperforate, transient, water-soluble tip.

Conventional catheters of the balloon-inflated retention type are generally provided at one end with a rounded tip or head containing one or more elongated openings to allow for the drainage of body fluids through the catheter. These drainage openings in the tip of the catheter are limited in size, since the larger they are, the more they tend to decrease the rigidity and resistance to distortion of the tip. Ideally, the insertion tip of a catheter should be as resistant to distortion as the body portion thereof, to resist doubling over upon insertion, with consequent discomfort and pain to the patient.

As a result of this physical limitation on the size of the openings in the catheter tip, the drainage of viscous fluids is imped ed. Furthermore, sediment or fragments of tissue may accumulate in and around the eyelets or openings, with a slowing down or even complete stoppage of the drainage function.

Ideally, once the catheter is in place, it would be desirable to utilize the maximum drainage capacity of the catheter by hailing the end of the catheter open and untipped. Open-end catheters have been proposed wherein the tipless open end of the catheter tube is provided with inserted reinforcing strips of lateximpregnated fabric, as in U. S. Pat. No. 2,677,375. However, such catheters do not have a smoothly rounded tip, so that an unprotected and uncovered edge of the tube end comes in contact with the passage through which the catheter is being threaded, with the danger of injury to the patent.

It has also been proposed to provide irrigation devices with tips which become soluble in aqueous fluids. However, all of such devices known to me have soluble tips which are perforate, in that they contain one or more drainage openings in the tip itself. Such devices are not well-suited to function as retention catheters of the balloon inflation type, since as soon as the perforate tip enters the bladder, drainage will begin. The nurse will then inflate the retention balloon, which may or may not be situated in the desired position inside the bladder and resting against the bladder wall. If the balloon is still in the upper portion of the urethral canal, its inflation is accompanied by extreme discomfort to the patient.

It is an object of this invention to provide a retention catheter of the balloon inflation type which can be inserted with maximum ease and lack of discomfort and which, once in place, offers maximum drainage capacity, and which minimizes the danger of premature inflation.

It is a further object of this invention to provide a retention catheter with a rounded, imperforate atraumatic tip which is capable of dissolving in body fluids.

The invention will be better understood with reference to the following description and drawing, in which:

FIG. 1 is a cross-sectional view of the catheter of this invention.

Referring to FIG. 1, there is shown an inflation catheter with a flexible body portion comprising sidewalls l212, of conventional construction, surrounding the drainage lumen 11. The insertion end of the catheter is provided with a tightly fitting rounded imperforate tip 10 formed from a substance which is firm and resilient when dry, but is capable of softening and dissolving in body fluids such as urine.

The catheter of this invention is of the inflation balloon type, wherein the drainage lumen 11 is provided with an inflation wall channel 22, said channel having the conventional angularly disposed inflation connection, not shown, by means of which fluid is transmitted through the channel and the communicating opening 20 to inflate the balloon l8, situated near the distal end of the body of the catheter and sealed thereto, said balloon and inflation lumen being well-known and conventional.

The catheter is also provided with an auxiliary drainage opening 24 in the wall 12, opening directly into the main drainage lumen 11. Such an opening assists in the drainage of small subnatant pockets of body fluids which may accumulate when the inflation of the balloon walls 18 causes the open tip of an indwelling catheter to project an appreciable distance beyond, for instance, the wall of the human bladder. More importantly, as the catheter is being inserted, the actual soluble tip of the catheter is closed, and drainage can begin only through this auxiliary opening 24. Thus, during the insertion process, the initiation of drainage is a sure sign to the nurse that the balloon portion of the catheter is inside the bladder, and that inflation can be safely carried out without discomfort to the patient.

The imperforate water-soluble catheter tip 10 should fit snugly and firmly over the open end of the catheter tube. It is, however, generally of thinner wall construction than the walls 12 of the catheter, a wall thickness of 2-5 mils facilitating satisfactorily rapid disintegration when the tip is immersed in, for example, urine. It may be fashioned from any suitable substance which has the property of forming a solid film capable of softening and dissolving in aqueous fluids, such as gelatin, methyl cellulose, polyvinyl alchol, polyethylene oxide, polyvinyl pyrrolidone, and the like. These may be-used alone, or in combination with water-soluble non-toxic plasticizers such as various glycols, to obtain the desired combination of flexibility and disintegration time. The substance chosen preferably will disintegrate and dissolve substantially completely when immersed in an aqueous fluid of pH 5 to 8 for a period of not more than 5 minutes.

The use of a catheter with'an imperforate tip soluble in body fluids is especially advantageous when occasional irrigation is to be carried out. In such proce' dures, substantial amounts of cellular debris and disconnected fragmented tissue are frequently dislodged which do not pass freely through the eyes of a conventional cather tip, but tend to collect in and around the eyes to impede or occlude the desired drainage function.

Having thus described my invention, 1 claim:

1. A flexible retention catheter of the balloon inflation type which comprises a flexible tubular body portion with an inflatable balloon sealed to said body near its distal end, said body portion having an open end beyond said balloon,

whereby the open end of the tubular body portion is covered during insertion of the catheter, the unobstructed auxiliary drainage opening will permit drainage of liquid as a signal to the operator of the catheter that the balloon and distal end are properly located before the balloon is inflated, and after the balloon is inflated to secure the catheter in proper position, the imperforate tip portion is dissolved to permit normal drainage.

Claims (1)

1. A flexible retention catheter of the balloon inflation type which comprises a flexible tubular body portion with an inflatable balloon sealed to said body near its distal end, said body portion having an open end beyond said balloon, and an imperforate distal tip portion terminating short of said balloon and composed wholly of a substance which is soluble in body fluids covering said open end, saId tubular body portion being provided with an unobstructed auxiliary drainage opening in the main wall of said body portion, said auxiliary drainage opening being directly connected to the drainage lumen of said catheter and being located near but below the point of attachment of the inflatable balloon to said body portion, whereby the open end of the tubular body portion is covered during insertion of the catheter, the unobstructed auxiliary drainage opening will permit drainage of liquid as a signal to the operator of the catheter that the balloon and distal end are properly located before the balloon is inflated, and after the balloon is inflated to secure the catheter in proper position, the imperforate tip portion is dissolved to permit normal drainage.
US3736939A 1972-01-07 1972-01-07 Balloon catheter with soluble tip Expired - Lifetime US3736939A (en)

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Cited By (80)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3889686A (en) * 1972-07-04 1975-06-17 Hoswell Vicki Lorraine Catheter tube
US4143651A (en) * 1977-11-03 1979-03-13 The Kendall Company Catheter
US4292976A (en) * 1979-08-08 1981-10-06 Banka Vidya S Right ventricular injection catheter; right ventricular angiographic method; and method of monitoring septal wall motion
US4315509A (en) * 1977-01-10 1982-02-16 Smit Julie A Insertion and removal catheters and intestinal tubes for restricting absorption
US4349029A (en) * 1980-06-16 1982-09-14 Mott Patricia A Drainage balloon catheter system
US4361152A (en) * 1975-05-27 1982-11-30 The Kendall Company Catheter
US4445890A (en) * 1980-05-05 1984-05-01 The Kendall Company Catheter
US4445891A (en) * 1980-05-05 1984-05-01 The Kendall Company Catheter
US4447228A (en) * 1980-05-05 1984-05-08 The Kendall Company Catheter
US4601713A (en) * 1985-06-11 1986-07-22 Genus Catheter Technologies, Inc. Variable diameter catheter
US4683874A (en) * 1986-02-07 1987-08-04 Angelo Acquista Bronchofiberscope
US4692152A (en) * 1984-03-16 1987-09-08 Fresnius Ag Medical tube
US4698056A (en) * 1986-03-21 1987-10-06 Medi-Tech, Inc. Enteric feeding device
US4710181A (en) * 1985-06-11 1987-12-01 Genus Catheter Technologies, Inc. Variable diameter catheter
US4722724A (en) * 1986-06-23 1988-02-02 Stanley Schocket Anterior chamber tube shunt to an encircling band, and related surgical procedure
US4738666A (en) * 1985-06-11 1988-04-19 Genus Catheter Technologies, Inc. Variable diameter catheter
US4739758A (en) * 1986-05-19 1988-04-26 Criticare Systems, Inc. Apparatus for stomach cavity reduction
US4773901A (en) * 1981-12-31 1988-09-27 C. R. Bard, Inc. Catheter with selectively rigidified portion
US4826478A (en) * 1986-06-23 1989-05-02 Stanley Schocket Anterior chamber tube shunt to an encircling band, and related surgical procedure
US4827940A (en) * 1987-04-13 1989-05-09 Cardiac Pacemakers, Inc. Soluble covering for cardiac pacing electrode
US4834725A (en) * 1986-03-27 1989-05-30 Pfrimmer-Viggo Gmbh & Co. Catheter for percutaneous gastrostomy
US4936835A (en) * 1988-05-26 1990-06-26 Haaga John R Medical needle with bioabsorbable tip
US4983166A (en) * 1987-12-28 1991-01-08 Yoshiharu Yamawaki Balloon catheter and method of use of the same
US5066278A (en) * 1989-08-09 1991-11-19 Siemens Aktiengesellschaft Implantable injection body
US5080655A (en) * 1988-05-26 1992-01-14 Haaga John R Medical biopsy needle
US5181505A (en) * 1989-03-08 1993-01-26 Lew Chel W Method and apparatus for delivery of a medicament in the oral cavity
US5195988A (en) * 1988-05-26 1993-03-23 Haaga John R Medical needle with removable sheath
US5254105A (en) * 1988-05-26 1993-10-19 Haaga John R Sheath for wound closure caused by a medical tubular device
US5281212A (en) * 1992-02-18 1994-01-25 Angeion Corporation Laser catheter with monitor and dissolvable tip
US5330445A (en) * 1988-05-26 1994-07-19 Haaga John R Sheath for wound closure caused by a medical tubular device
US5397306A (en) * 1989-12-20 1995-03-14 Terumo Kabushiki Kaisha Catheter
US5431639A (en) * 1993-08-12 1995-07-11 Boston Scientific Corporation Treating wounds caused by medical procedures
US5474542A (en) * 1993-10-01 1995-12-12 Gandi; Robert A. Catheter having imperforate protective barrier and method for making and using the same
US5477862A (en) * 1994-03-14 1995-12-26 Haaga; John R. Cutting tip for biopsy needle
US5531783A (en) * 1995-01-17 1996-07-02 Vitatron Medical, B.V. Pacing lead with x-ray visible soluble covering and method of inserting same into a patient's heart
US5603698A (en) * 1993-04-13 1997-02-18 Boston Scientific Corporation Prosthesis delivery system
US5653742A (en) * 1995-09-20 1997-08-05 Cochlear Pty. Ltd. Use of bioresorbable polymers in cochlear implants and other implantable devices
US5766201A (en) * 1995-06-07 1998-06-16 Boston Scientific Corporation Expandable catheter
US5779686A (en) * 1993-04-19 1998-07-14 Olympus Optical Co., Ltd. Disposable medical instrument
US5830217A (en) * 1996-08-09 1998-11-03 Thomas J. Fogarty Soluble fixation device and method for stent delivery catheters
WO1999002091A1 (en) * 1997-07-07 1999-01-21 Sub-Q Inc. Apparatus and method for percutaneous sealing of blood vessel punctures
US5902333A (en) * 1993-04-13 1999-05-11 Boston Scientific Corporation Prosthesis delivery system with dilating tip
US5935103A (en) * 1991-12-17 1999-08-10 Heartport, Inc. Blood vessel occlusion device
JP2970937B2 (en) 1989-11-13 1999-11-02 ボストン サイエンティフィック コーポレーション Catheter with a soluble tip
US20020016612A1 (en) * 1998-05-01 2002-02-07 Mark Ashby Device and method for facilitating hemostasis of a biopsy tract
US20020190226A1 (en) * 2001-03-12 2002-12-19 Mark Ashby Methods for sterilizing cross-linked gelatin compositions
US20030028140A1 (en) * 2001-03-12 2003-02-06 Greff Richard J. Cross-linked gelatin composition comprising a wetting agent
US20030088269A1 (en) * 2001-11-08 2003-05-08 Sub-Q, Inc. System and method for delivering hemostasis promoting material to a blood vessel puncture site by fluid pressure
US20030163145A1 (en) * 2002-02-27 2003-08-28 Raulerson J. Daniel Dissolvable subcutaneous catheter cover
US6673058B2 (en) * 2001-06-20 2004-01-06 Scimed Life Systems, Inc. Temporary dilating tip for gastro-intestinal tubes
US20040019328A1 (en) * 2001-11-08 2004-01-29 Sing Eduardo Chi System and method for delivering hemostasis promoting material to a blood vessel puncture site by fluid pressure
US20040019330A1 (en) * 2001-11-08 2004-01-29 Sub-Q, Inc., A California Corporation Sheath based blood vessel puncture locator and depth indicator
US6740273B2 (en) * 2001-01-03 2004-05-25 Keun-Ho Lee Method for making balloon catheter
US20040176723A1 (en) * 2001-11-08 2004-09-09 Sing Eduardo Chi Pledget-handling system and method for delivering hemostasis promoting material to a blood vessel puncture site by fluid pressure
US20040186422A1 (en) * 2003-03-20 2004-09-23 Robert Rioux Devices and methods for delivering therapeutic or diagnostic agents
US20040215130A1 (en) * 2003-03-20 2004-10-28 Scimed Life Systems, Inc. Devices and methods for delivering therapeutic or diagnostic agents
US20050033360A1 (en) * 2001-11-08 2005-02-10 Sing Eduardo Chi Pledget-handling system and method for delivering hemostasis promoting material to a blood vessel puncture site by fluid pressure
US20050059080A1 (en) * 1998-05-01 2005-03-17 Sing Eduardo Chi Absorbable sponge with contrasting agent
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US20050277862A1 (en) * 2004-06-09 2005-12-15 Anand Pj Splitable tip catheter with bioresorbable adhesive
US6984219B2 (en) 1999-09-23 2006-01-10 Mark Ashby Depth and puncture control for blood vessel hemostasis system
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US20060247753A1 (en) * 2005-04-29 2006-11-02 Wenger William K Subcutaneous lead fixation mechanisms
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US7625352B1 (en) 1998-05-01 2009-12-01 Sub-Q, Inc. Depth and puncture control for system for hemostasis of blood vessel
US20100324648A1 (en) * 2007-08-29 2010-12-23 Bruno Scheller Controlled expansion balloon catheter
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GB2472407A (en) * 2009-08-05 2011-02-09 Robert Theriault Foley catheter with additional intermittently or slowly draining port
US8092415B2 (en) 2007-11-01 2012-01-10 C. R. Bard, Inc. Catheter assembly including triple lumen tip
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US8500939B2 (en) 2007-10-17 2013-08-06 Bard Access Systems, Inc. Manufacture of split tip catheters
US8696614B2 (en) 2007-10-26 2014-04-15 C. R. Bard, Inc. Split-tip catheter including lateral distal openings
US8808227B2 (en) 2003-02-21 2014-08-19 C. R. Bard, Inc. Multi-lumen catheter with separate distal tips
USD748252S1 (en) 2013-02-08 2016-01-26 C. R. Bard, Inc. Multi-lumen catheter tip
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Cited By (129)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3889686A (en) * 1972-07-04 1975-06-17 Hoswell Vicki Lorraine Catheter tube
US4361152A (en) * 1975-05-27 1982-11-30 The Kendall Company Catheter
US4315509A (en) * 1977-01-10 1982-02-16 Smit Julie A Insertion and removal catheters and intestinal tubes for restricting absorption
US4143651A (en) * 1977-11-03 1979-03-13 The Kendall Company Catheter
US4292976A (en) * 1979-08-08 1981-10-06 Banka Vidya S Right ventricular injection catheter; right ventricular angiographic method; and method of monitoring septal wall motion
US4445890A (en) * 1980-05-05 1984-05-01 The Kendall Company Catheter
US4447228A (en) * 1980-05-05 1984-05-08 The Kendall Company Catheter
US4445891A (en) * 1980-05-05 1984-05-01 The Kendall Company Catheter
US4349029A (en) * 1980-06-16 1982-09-14 Mott Patricia A Drainage balloon catheter system
US4773901A (en) * 1981-12-31 1988-09-27 C. R. Bard, Inc. Catheter with selectively rigidified portion
US4692152A (en) * 1984-03-16 1987-09-08 Fresnius Ag Medical tube
US4738666A (en) * 1985-06-11 1988-04-19 Genus Catheter Technologies, Inc. Variable diameter catheter
WO1986007267A1 (en) * 1985-06-11 1986-12-18 Genus Catheter Technologies, Inc. Variable diameter catheter
US4601713A (en) * 1985-06-11 1986-07-22 Genus Catheter Technologies, Inc. Variable diameter catheter
US4710181A (en) * 1985-06-11 1987-12-01 Genus Catheter Technologies, Inc. Variable diameter catheter
US4683874A (en) * 1986-02-07 1987-08-04 Angelo Acquista Bronchofiberscope
US4698056A (en) * 1986-03-21 1987-10-06 Medi-Tech, Inc. Enteric feeding device
US4834725A (en) * 1986-03-27 1989-05-30 Pfrimmer-Viggo Gmbh & Co. Catheter for percutaneous gastrostomy
US4739758A (en) * 1986-05-19 1988-04-26 Criticare Systems, Inc. Apparatus for stomach cavity reduction
US4722724A (en) * 1986-06-23 1988-02-02 Stanley Schocket Anterior chamber tube shunt to an encircling band, and related surgical procedure
US4826478A (en) * 1986-06-23 1989-05-02 Stanley Schocket Anterior chamber tube shunt to an encircling band, and related surgical procedure
US4827940A (en) * 1987-04-13 1989-05-09 Cardiac Pacemakers, Inc. Soluble covering for cardiac pacing electrode
US4983166A (en) * 1987-12-28 1991-01-08 Yoshiharu Yamawaki Balloon catheter and method of use of the same
US5330445A (en) * 1988-05-26 1994-07-19 Haaga John R Sheath for wound closure caused by a medical tubular device
US5573518A (en) * 1988-05-26 1996-11-12 Haaga; John R. Sheath for wound closure caused by a medical tubular device
US5080655A (en) * 1988-05-26 1992-01-14 Haaga John R Medical biopsy needle
US5447502A (en) * 1988-05-26 1995-09-05 Haaga; John R. Sheath for wound closure caused by a medical tubular device
US5195988A (en) * 1988-05-26 1993-03-23 Haaga John R Medical needle with removable sheath
US5254105A (en) * 1988-05-26 1993-10-19 Haaga John R Sheath for wound closure caused by a medical tubular device
US4936835A (en) * 1988-05-26 1990-06-26 Haaga John R Medical needle with bioabsorbable tip
US5181505A (en) * 1989-03-08 1993-01-26 Lew Chel W Method and apparatus for delivery of a medicament in the oral cavity
US5066278A (en) * 1989-08-09 1991-11-19 Siemens Aktiengesellschaft Implantable injection body
JP2970937B2 (en) 1989-11-13 1999-11-02 ボストン サイエンティフィック コーポレーション Catheter with a soluble tip
US5397306A (en) * 1989-12-20 1995-03-14 Terumo Kabushiki Kaisha Catheter
US5997505A (en) * 1991-12-17 1999-12-07 Heartport, Inc. Method of cannulating an ascending aorta using a blood vessel occlusion device
US5941894A (en) * 1991-12-17 1999-08-24 Heartport, Inc. Blood vessel occlusion device
US6224619B1 (en) 1991-12-17 2001-05-01 Heartport, Inc. Blood vessel occlusion trocar having size and shape varying insertion body
US5935103A (en) * 1991-12-17 1999-08-10 Heartport, Inc. Blood vessel occlusion device
US5281212A (en) * 1992-02-18 1994-01-25 Angeion Corporation Laser catheter with monitor and dissolvable tip
US5603698A (en) * 1993-04-13 1997-02-18 Boston Scientific Corporation Prosthesis delivery system
US5984964A (en) * 1993-04-13 1999-11-16 Boston Scientific Corporation Prothesis delivery system
US5902333A (en) * 1993-04-13 1999-05-11 Boston Scientific Corporation Prosthesis delivery system with dilating tip
US5779686A (en) * 1993-04-19 1998-07-14 Olympus Optical Co., Ltd. Disposable medical instrument
US5431639A (en) * 1993-08-12 1995-07-11 Boston Scientific Corporation Treating wounds caused by medical procedures
US5474542A (en) * 1993-10-01 1995-12-12 Gandi; Robert A. Catheter having imperforate protective barrier and method for making and using the same
US5477862A (en) * 1994-03-14 1995-12-26 Haaga; John R. Cutting tip for biopsy needle
US5531783A (en) * 1995-01-17 1996-07-02 Vitatron Medical, B.V. Pacing lead with x-ray visible soluble covering and method of inserting same into a patient's heart
US6048356A (en) * 1995-06-07 2000-04-11 Boston Scientific Corporation Expandable catheter
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