CA1307179C - Extendable guidewire for cardiovascular procedures - Google Patents
Extendable guidewire for cardiovascular proceduresInfo
- Publication number
- CA1307179C CA1307179C CA000586833A CA586833A CA1307179C CA 1307179 C CA1307179 C CA 1307179C CA 000586833 A CA000586833 A CA 000586833A CA 586833 A CA586833 A CA 586833A CA 1307179 C CA1307179 C CA 1307179C
- Authority
- CA
- Canada
- Prior art keywords
- guidewire
- section
- tubular member
- male member
- extendable
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Lifetime
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
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
- A61M25/0905—Guide wires extendable, e.g. mechanisms for extension
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49863—Assembling or joining with prestressing of part
- Y10T29/49876—Assembling or joining with prestressing of part by snap fit
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49945—Assembling or joining by driven force fit
Abstract
EXTENDABLE GUIDEWIRE FOR CARDIOVASCULAR PROCEDURES
Abstract of the Disclosure An extendable guidewire system for introducing a dilatation catheter into the cardiovascular system. The guidewire has guidewire and extension sections with a connection therebetween which permits the two sections to be joined together and separated simply by pushing the two sections together and pulling them apart. One of the sections can be used for positioning the catheter within the cardiovascular system, and the other section can be employed to extend the wire to change catheters.
Abstract of the Disclosure An extendable guidewire system for introducing a dilatation catheter into the cardiovascular system. The guidewire has guidewire and extension sections with a connection therebetween which permits the two sections to be joined together and separated simply by pushing the two sections together and pulling them apart. One of the sections can be used for positioning the catheter within the cardiovascular system, and the other section can be employed to extend the wire to change catheters.
Description
;" ~L3al7~g 6623g-1470 This invention generally relates to cardiovascular procedures such as angioplasty, angiography and valvuloplasty, and more par~icularly to an extendable guidewire for use in such procedures.
Guidewires are currently used to facilitate the placement of catheters in the arterial system of a patient for cardiovascular procedures such as angioplasty, angiography and valvuloplasty. The guidewire i~ typically on the order of 20-50 cm longer than the catheter to permit the guidewire and the catheter to be advanced relative to each other as they are steered into position within the patient's body. Suitable guidewires are described in the U.S. Patent No. 4,538,622 ~Samson et al.) and U.S. Patent No. 4,569,347 (Frisble).
In the usual procedure to change catheters, the guidewire is removed from the patient, and an exchange wire i6 inserted in its place. The in-place catheter is removed ~rom the patient and a new catheter is inserted into the patient. The exchange wire is then removed and the guidewire is reinserted.
The exchange wire is substantially longer than the guidewire, and it generally extends outside the patient's body for a distance greater than the length of the catheter. With a dilatation catheter having a length on ~he order o~ 120-140 cm, for example, a guidewire might have a length on the order of 175 cm, and an exchange wire might have a length on the order of 300 cm. The use of an exchange wire has the obvious disadvantage that it complicates the angioplasty procedure.
Heretofore, there have been some attempts to eliminate ~: _.. r~ 1 ~
:
' ' ' . .
`` ~L307~i79 the need for a separate exchange wlre by attachlng an extengion wire to a guidewire to extend the leng~h thereof. The t~o wires are joined together by a crimped connector which requires a special tool. Once ~he wires have been crimped, ~he connection therebetween is permanent, and the e~tension wire cannot be removed except by severing it from the guidewire.
What has been needed and heretofore unavailable is an extension which can be readily connected and disconnected to the guidewire when it is in position within the patient. The present invention satis~ies this naed.
SUMMARY OF THE INVENTION
The present invention provides a new and lmproved guidewire system and the method of using the same.
The present invention provides an extendahle guldewire system comprising: (a) a main guidewire section adapted to be inserted into a patient's vascular system which has a mating end adapted to extend out of the patient; (b) a guidewire extension section haviny a mating end; and (c) a connection therebetween suitable for repetitive connections including a tubular member on the mating end of one of the guidewire sections having an open end, a male member on the mating end of the other guidewire section which is adapted to be manually inserted into the opan end of the tubular member and means to releasably secure the two sections togekher by frictlonal engagement between the tubular member and the male member.
The male member preferably has an effective diameter in one radial dimension which ls slightly larger than the inner r~ 2 3~7~L79 diameter of the tubular portion. The slightly laryer connecting end of one of the guidewire sections is inserted in~o the ~ubular end of the other guidewire sectlon. One or both of the connecting endæ are deformed to provlde an interference or friction fit therebetween and thereby detachably secure the two guidewire sec~ions together. The two sec~ions can be readily separated by pulling them apart. The two sections can be reconnected and disconnected as desired.
These and other advantages of the invention will become more apparent from the following detalled description thereof and the accompanying exemplary drawings.
BRI$F DESCRIPT ON _F THE DRAWINGS
FIG. 1 is a fragmentary, centerline sectional view of an extendable guidewire embodying ~eature~ of the invention, with parts separated;
FIG. 2 is a fragmentary centerline view of the embodiment shown in FIG. 1 wlth the parts joined;
FIG. 3 is a cross-sectional view taken along lines 3-3 of FI&. 2; and FIG. 4 is a partial centerline sectional view of an alternative embodiment.
DETAILED DESCRIPTION OF THE INV~NTION
As illustrated in FIG. 1-3, the guldewire system 10 embodying features of the invention has a main section 11 which is adapted to be inserted into a patient's vascular system and an extension section 12 which can be connected and disconnected ko the main ~ection 11 to facllitate the exchange of catheters `~; f " 3 ~. ~
. .
~307~L79 66239-1~70 without the need for removiny the main section 10 from khe patient's vascular system. Maln guidewire section 11 generally comprises an elongated shaft 13 with a ~lexible tip (not shown) at its distal end and a smaller dlameter portion 14 at its proximal end which is shaped into an undulating or sinusoldal shape.
Reference is made to U.S. Patent 4,538,622 ISamson et al.) and U.S. Patent 4,56g,347 (Frisbie), for a description of deslrable guidewire tip constructions. Extension section 12 has an elongated shaft 16 with smaller diameter projection or post 17 at its distal end.
The connection 18 between guidewire secttons 11 and 12 generally comprise tubular member 19 which is fixed to the distal end of the extension section 12 and which receives interfi~ting undulating member 14 which is on the proximal end of main section 11. Tubular member 19 is mounted by suitable means æuch as welding, brazing, suturing, by an adhesive or the like onto the short axial extension 17 of reduced diameter at the distal end of shaft 16. Axial extension or post 17 can be ~ormed by any suitable means such as ~`` r~ 4 ~L3~)7~7~3 grinding down the proximal end portion o~ the shaft 16 to the desired diameter so that it interfits into the end of tubular member 15. The undulating portion 14 is formed by first grinding the proximal end of main section 11 to a smaller diameter, then forming the undulations or sinusoidal shape by bending over a mandrel or other suitable means.
The maximum effective dimension A of the undulated section should be slightly more than the inner diameter B of tubular connecting piece 17 but preferably not more than 50% greater than dimension B to provide interference or friction fit which will hold the sections together during catheter exchange but which can be readily disengaged after exchange has been made. Preferably no more than a one pound pull should be necessary for disengagement.
In a guidewire having a diameter on the order of about .36 mm (.014 inch), for example, tubular member 19 might have an inner diameter of about .18 mm (.007 inch) and a wall thickness on the order of .025 mm (.001 inch) and the undulating section 14 might have a maximum e~fective radial dimension of about .23 mm (.009 inch). In this embodiment, tubular member 19 might have a length on the order of about 2.4-2.5 cm.
The ~ain guidewire section is intended for use in positioning a dilatation catheter (not shown) in the cardiovascular system of a patient, and it has a length corresponding to the length of a conventional guidewire for this purpose. Details of typical dilatation catheters and guidewires can .~ .
~307~L7~
6623~-1470 be found in the pa~ent~ cl~ed previously.
Extension section 12 is suf~iciently long so tha~ when the guidewire sections 11 and 12 are connected together the guidewire system 10 has an overall length suikable ~or exchanginy catheters without removing the main section 11 from the patient's vascular system. With a dilatation catheter having a length on the order of 120-140 cm, for example, section 11 might have a length of 140-175 cm, and section 12 might have a length of 125-160 cm.
Shafts 13 and 16 and tubular member 19 can be fabricated from suitable material, such as stainless steel, Nitinol ~55% Mi-Bal. Ti), and the like, and each should have a diameter to allow a dilatation catheter to pass freely over them. It is preferable that the two shafts 13 and 16 be of substantially the same diameter in order to provide a smooth transition between them. In one presently preferred embodiment for use in coronary angioplasty, shafts 13 and 16 have a diameter on the order of about .36 mm ~.014 inch). Either or both of the æha~ts can be provided with a coating of polytetrafluoroethylene, which is sold under the trademark Teflon by the DuPont Corporation, or another suitable low-friction material to facilitate the movement of the catheter over the wire.
An alternative embodiment is shown in FIG. ~ wherein the proximal end of main guidewire section 12 which is adapted to be inserted into the . ~ 6 !
.
tubular member 19 is provided with a smaller diameter poxtion 30 having protrusions 31 which provide the interference or friction ~it to releasably secure together the sections 11 and 12 of the guidewire system 10. The protrusions can have various shapes such as the semi-spherical shapes ~hown in FIG. 4, triangular shapes, or other shapes which may provide a suitable fit.
In use, the main guidewire section 11 is introduced into the vascular system o~ a patient with a dilatation catheter through a guiding catheter (not shown) and an introducer ~not shown).
When per~orming coronary angioplasty, the distal end of the guiding catheter is positioned in the coronary ostium, and the dilatation catheter is advanced so that it is just proximal to the tip of the guiding catheter.
The distal kip o~ the guidewire is advanced beyond the distal tip o~ the dilatation catheter while the latter is held in place. As the main guidewire section 11 is advanced, it is rotated and steered inko the selected artery. The guidewire tip is preferably advanced through the lesion and beyond it, in order to permit the balloon portion of the dilatation catheter to be positioned within the lesion over a more supportive section of the guidewire. Once in position, the main guidewire section 11 is held in place and the dilatation cathetex is advanced along it until the inflatable balioon thereof is within the lesion.
Undulating end portion 14 remains outside the patient's body and outside any adapter which may be ~3~)7~7~
connected to the proximal end of the dilatation catheter.
To exchange catheters, the main guidewire section ll is extended by manually pressing the open end of tuhular member 19 on the distal end of extension section 12 onto the undulating end 14.
As the tubular member 19 is inserted over the undulating end 14, either the tubular member l9 or the undulating member 14 or both deform to thereby firmly but releasably hold the two guidewire sections together. The dilatation catheter can then be withdrawn from the patient's body over the extended guidewire system.
A new dilatation catheter may then be introduced over the extension section 12 and advanced along the main guidewire section 11 within the patient's body until the balloon crosses the lesionO once the proximal end of the new balloon catheter has advanced beyond connection 18 and tubular end portion 19, section 12 can be removed by grasping the two guidewire sections ll and 12 on opposite sides of the connection 18 and pulling them apart without disturbing the position of section ll in the patient's body. As previously described, the interference or friction fit between the undulating member 14 and the tubular member l9 should be sufficiently strong to hold the two guidewire sections ll and 12 together while dilatation catheters are being exchanged, but should be capable of separation by a pulling force less than one pound.
.
~3(1~7~
The invention has a number of important features and advantages. The two sections of the guidewire can be connected together whenever a longer wire is needed, and they can be separated whenever the additional length is not required.
The two sections of the guidewire may be connected and disconnected by the physician by simply pressing them together and pulling them apart.
This can be Aone as needed, and no special tools are required either to make the connection or to separate it. Thus the catheter exchange is greatly simplified.
It is apparent from the foregoing that a new and improved extended guidewire system and method of using the same have been provided. While the present invention has been described herein with the tubular connecting element fixed to the distal end of the guidewire extension section and the male member adapted to be inserted into the open end of the tubular member on the proximal end of the main guidewire section, it is obvious that the tubular element on the distal end of the extension section may be interchanged with the male member on the main guidewire section. Moreover, it will be apparent to those familiar with the art, that other modi~ications and improvements can be made without deparking from the scope of the invention as defined by the following claims.
:
.. .. .
.
Guidewires are currently used to facilitate the placement of catheters in the arterial system of a patient for cardiovascular procedures such as angioplasty, angiography and valvuloplasty. The guidewire i~ typically on the order of 20-50 cm longer than the catheter to permit the guidewire and the catheter to be advanced relative to each other as they are steered into position within the patient's body. Suitable guidewires are described in the U.S. Patent No. 4,538,622 ~Samson et al.) and U.S. Patent No. 4,569,347 (Frisble).
In the usual procedure to change catheters, the guidewire is removed from the patient, and an exchange wire i6 inserted in its place. The in-place catheter is removed ~rom the patient and a new catheter is inserted into the patient. The exchange wire is then removed and the guidewire is reinserted.
The exchange wire is substantially longer than the guidewire, and it generally extends outside the patient's body for a distance greater than the length of the catheter. With a dilatation catheter having a length on ~he order o~ 120-140 cm, for example, a guidewire might have a length on the order of 175 cm, and an exchange wire might have a length on the order of 300 cm. The use of an exchange wire has the obvious disadvantage that it complicates the angioplasty procedure.
Heretofore, there have been some attempts to eliminate ~: _.. r~ 1 ~
:
' ' ' . .
`` ~L307~i79 the need for a separate exchange wlre by attachlng an extengion wire to a guidewire to extend the leng~h thereof. The t~o wires are joined together by a crimped connector which requires a special tool. Once ~he wires have been crimped, ~he connection therebetween is permanent, and the e~tension wire cannot be removed except by severing it from the guidewire.
What has been needed and heretofore unavailable is an extension which can be readily connected and disconnected to the guidewire when it is in position within the patient. The present invention satis~ies this naed.
SUMMARY OF THE INVENTION
The present invention provides a new and lmproved guidewire system and the method of using the same.
The present invention provides an extendahle guldewire system comprising: (a) a main guidewire section adapted to be inserted into a patient's vascular system which has a mating end adapted to extend out of the patient; (b) a guidewire extension section haviny a mating end; and (c) a connection therebetween suitable for repetitive connections including a tubular member on the mating end of one of the guidewire sections having an open end, a male member on the mating end of the other guidewire section which is adapted to be manually inserted into the opan end of the tubular member and means to releasably secure the two sections togekher by frictlonal engagement between the tubular member and the male member.
The male member preferably has an effective diameter in one radial dimension which ls slightly larger than the inner r~ 2 3~7~L79 diameter of the tubular portion. The slightly laryer connecting end of one of the guidewire sections is inserted in~o the ~ubular end of the other guidewire sectlon. One or both of the connecting endæ are deformed to provlde an interference or friction fit therebetween and thereby detachably secure the two guidewire sec~ions together. The two sec~ions can be readily separated by pulling them apart. The two sections can be reconnected and disconnected as desired.
These and other advantages of the invention will become more apparent from the following detalled description thereof and the accompanying exemplary drawings.
BRI$F DESCRIPT ON _F THE DRAWINGS
FIG. 1 is a fragmentary, centerline sectional view of an extendable guidewire embodying ~eature~ of the invention, with parts separated;
FIG. 2 is a fragmentary centerline view of the embodiment shown in FIG. 1 wlth the parts joined;
FIG. 3 is a cross-sectional view taken along lines 3-3 of FI&. 2; and FIG. 4 is a partial centerline sectional view of an alternative embodiment.
DETAILED DESCRIPTION OF THE INV~NTION
As illustrated in FIG. 1-3, the guldewire system 10 embodying features of the invention has a main section 11 which is adapted to be inserted into a patient's vascular system and an extension section 12 which can be connected and disconnected ko the main ~ection 11 to facllitate the exchange of catheters `~; f " 3 ~. ~
. .
~307~L79 66239-1~70 without the need for removiny the main section 10 from khe patient's vascular system. Maln guidewire section 11 generally comprises an elongated shaft 13 with a ~lexible tip (not shown) at its distal end and a smaller dlameter portion 14 at its proximal end which is shaped into an undulating or sinusoldal shape.
Reference is made to U.S. Patent 4,538,622 ISamson et al.) and U.S. Patent 4,56g,347 (Frisbie), for a description of deslrable guidewire tip constructions. Extension section 12 has an elongated shaft 16 with smaller diameter projection or post 17 at its distal end.
The connection 18 between guidewire secttons 11 and 12 generally comprise tubular member 19 which is fixed to the distal end of the extension section 12 and which receives interfi~ting undulating member 14 which is on the proximal end of main section 11. Tubular member 19 is mounted by suitable means æuch as welding, brazing, suturing, by an adhesive or the like onto the short axial extension 17 of reduced diameter at the distal end of shaft 16. Axial extension or post 17 can be ~ormed by any suitable means such as ~`` r~ 4 ~L3~)7~7~3 grinding down the proximal end portion o~ the shaft 16 to the desired diameter so that it interfits into the end of tubular member 15. The undulating portion 14 is formed by first grinding the proximal end of main section 11 to a smaller diameter, then forming the undulations or sinusoidal shape by bending over a mandrel or other suitable means.
The maximum effective dimension A of the undulated section should be slightly more than the inner diameter B of tubular connecting piece 17 but preferably not more than 50% greater than dimension B to provide interference or friction fit which will hold the sections together during catheter exchange but which can be readily disengaged after exchange has been made. Preferably no more than a one pound pull should be necessary for disengagement.
In a guidewire having a diameter on the order of about .36 mm (.014 inch), for example, tubular member 19 might have an inner diameter of about .18 mm (.007 inch) and a wall thickness on the order of .025 mm (.001 inch) and the undulating section 14 might have a maximum e~fective radial dimension of about .23 mm (.009 inch). In this embodiment, tubular member 19 might have a length on the order of about 2.4-2.5 cm.
The ~ain guidewire section is intended for use in positioning a dilatation catheter (not shown) in the cardiovascular system of a patient, and it has a length corresponding to the length of a conventional guidewire for this purpose. Details of typical dilatation catheters and guidewires can .~ .
~307~L7~
6623~-1470 be found in the pa~ent~ cl~ed previously.
Extension section 12 is suf~iciently long so tha~ when the guidewire sections 11 and 12 are connected together the guidewire system 10 has an overall length suikable ~or exchanginy catheters without removing the main section 11 from the patient's vascular system. With a dilatation catheter having a length on the order of 120-140 cm, for example, section 11 might have a length of 140-175 cm, and section 12 might have a length of 125-160 cm.
Shafts 13 and 16 and tubular member 19 can be fabricated from suitable material, such as stainless steel, Nitinol ~55% Mi-Bal. Ti), and the like, and each should have a diameter to allow a dilatation catheter to pass freely over them. It is preferable that the two shafts 13 and 16 be of substantially the same diameter in order to provide a smooth transition between them. In one presently preferred embodiment for use in coronary angioplasty, shafts 13 and 16 have a diameter on the order of about .36 mm ~.014 inch). Either or both of the æha~ts can be provided with a coating of polytetrafluoroethylene, which is sold under the trademark Teflon by the DuPont Corporation, or another suitable low-friction material to facilitate the movement of the catheter over the wire.
An alternative embodiment is shown in FIG. ~ wherein the proximal end of main guidewire section 12 which is adapted to be inserted into the . ~ 6 !
.
tubular member 19 is provided with a smaller diameter poxtion 30 having protrusions 31 which provide the interference or friction ~it to releasably secure together the sections 11 and 12 of the guidewire system 10. The protrusions can have various shapes such as the semi-spherical shapes ~hown in FIG. 4, triangular shapes, or other shapes which may provide a suitable fit.
In use, the main guidewire section 11 is introduced into the vascular system o~ a patient with a dilatation catheter through a guiding catheter (not shown) and an introducer ~not shown).
When per~orming coronary angioplasty, the distal end of the guiding catheter is positioned in the coronary ostium, and the dilatation catheter is advanced so that it is just proximal to the tip of the guiding catheter.
The distal kip o~ the guidewire is advanced beyond the distal tip o~ the dilatation catheter while the latter is held in place. As the main guidewire section 11 is advanced, it is rotated and steered inko the selected artery. The guidewire tip is preferably advanced through the lesion and beyond it, in order to permit the balloon portion of the dilatation catheter to be positioned within the lesion over a more supportive section of the guidewire. Once in position, the main guidewire section 11 is held in place and the dilatation cathetex is advanced along it until the inflatable balioon thereof is within the lesion.
Undulating end portion 14 remains outside the patient's body and outside any adapter which may be ~3~)7~7~
connected to the proximal end of the dilatation catheter.
To exchange catheters, the main guidewire section ll is extended by manually pressing the open end of tuhular member 19 on the distal end of extension section 12 onto the undulating end 14.
As the tubular member 19 is inserted over the undulating end 14, either the tubular member l9 or the undulating member 14 or both deform to thereby firmly but releasably hold the two guidewire sections together. The dilatation catheter can then be withdrawn from the patient's body over the extended guidewire system.
A new dilatation catheter may then be introduced over the extension section 12 and advanced along the main guidewire section 11 within the patient's body until the balloon crosses the lesionO once the proximal end of the new balloon catheter has advanced beyond connection 18 and tubular end portion 19, section 12 can be removed by grasping the two guidewire sections ll and 12 on opposite sides of the connection 18 and pulling them apart without disturbing the position of section ll in the patient's body. As previously described, the interference or friction fit between the undulating member 14 and the tubular member l9 should be sufficiently strong to hold the two guidewire sections ll and 12 together while dilatation catheters are being exchanged, but should be capable of separation by a pulling force less than one pound.
.
~3(1~7~
The invention has a number of important features and advantages. The two sections of the guidewire can be connected together whenever a longer wire is needed, and they can be separated whenever the additional length is not required.
The two sections of the guidewire may be connected and disconnected by the physician by simply pressing them together and pulling them apart.
This can be Aone as needed, and no special tools are required either to make the connection or to separate it. Thus the catheter exchange is greatly simplified.
It is apparent from the foregoing that a new and improved extended guidewire system and method of using the same have been provided. While the present invention has been described herein with the tubular connecting element fixed to the distal end of the guidewire extension section and the male member adapted to be inserted into the open end of the tubular member on the proximal end of the main guidewire section, it is obvious that the tubular element on the distal end of the extension section may be interchanged with the male member on the main guidewire section. Moreover, it will be apparent to those familiar with the art, that other modi~ications and improvements can be made without deparking from the scope of the invention as defined by the following claims.
:
.. .. .
.
Claims (9)
1. An extendable guidewire system comprising:
(a) a main guidewire section adapted to be inserted into a patient's vascular system which has a mating end adapted to extend out of the patient;
(b) a guidewire extension section having a mating end;
and (c) a connection therebetween suitable for repetitive connections including a tubular member on the mating end of one of the guidewire sections having an open end, a male member on the mating end of the other guidewire section which is adapted to be manually inserted into the open end of the tubular member and means to releasably secure the two sections together by frictional engagement between the tubular member and the male member.
(a) a main guidewire section adapted to be inserted into a patient's vascular system which has a mating end adapted to extend out of the patient;
(b) a guidewire extension section having a mating end;
and (c) a connection therebetween suitable for repetitive connections including a tubular member on the mating end of one of the guidewire sections having an open end, a male member on the mating end of the other guidewire section which is adapted to be manually inserted into the open end of the tubular member and means to releasably secure the two sections together by frictional engagement between the tubular member and the male member.
2. The extendable guidewire system of claim 1 wherein the tubular member is fixed to the mating end of the guidewire extension section and the male member is on the mating end of the main guidewire section.
3. The extendable guidewire system of claim 1 wherein the tubular member is fixed to the mating end of the main guidewire section and the male member is on the mating end of the guidewire extension section.
4. The guidewire extension system of claim 1 wherein the tubular member is fixed to an end of a guidewire section by welding.
5. The guidewire extension system of claim 1 wherein the tubular member is fixed to an end of a guidewire section by brazing.
6. The guidewire extension system of claim 1 wherein the male member has protrusions on the outer surface thereof which engage the inner surface of the tubular member to thereby releasably secure the two guidewire sections together.
7. The extendable guidewire system of claim 1 wherein the male member has a diametrical dimension slightly larger than the inner diametrical dimension of the tubular member receiving the male member so that upon the insertion of the male member into the tubular member the guidewire sections are releasably secured together.
8. The extendable guidewire system of claim 7 wherein the male member is provided with an undulated shape.
9. The extendable guidewire system of claim 7 wherein the maximum diametrical dimension of the male member is not more than 50% greater than the inside diameter of the tubular member.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US137,963 | 1987-12-23 | ||
US07/137,963 US4827941A (en) | 1987-12-23 | 1987-12-23 | Extendable guidewire for cardiovascular procedures |
Publications (1)
Publication Number | Publication Date |
---|---|
CA1307179C true CA1307179C (en) | 1992-09-08 |
Family
ID=22479820
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA000586833A Expired - Lifetime CA1307179C (en) | 1987-12-23 | 1988-12-22 | Extendable guidewire for cardiovascular procedures |
Country Status (6)
Country | Link |
---|---|
US (1) | US4827941A (en) |
EP (2) | EP0566523B1 (en) |
JP (1) | JP2781187B2 (en) |
AU (1) | AU622122B2 (en) |
CA (1) | CA1307179C (en) |
DE (3) | DE3856400T2 (en) |
Families Citing this family (178)
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US5105818A (en) * | 1987-04-10 | 1992-04-21 | Cardiometric, Inc. | Apparatus, system and method for measuring spatial average velocity and/or volumetric flow of blood in a vessel and screw joint for use therewith |
US4934380A (en) * | 1987-11-27 | 1990-06-19 | Boston Scientific Corporation | Medical guidewire |
MY103860A (en) * | 1988-06-13 | 1993-09-30 | Bard Inc C R | Guidewire extension with self-latching detachable connector |
US4961433A (en) * | 1988-11-02 | 1990-10-09 | Cardiometrics, Inc. | Guide wire assembly with electrical functions and male and female connectors for use therewith |
US5203772A (en) * | 1989-01-09 | 1993-04-20 | Pilot Cardiovascular Systems, Inc. | Steerable medical device |
US5108368A (en) * | 1990-01-04 | 1992-04-28 | Pilot Cardiovascular System, Inc. | Steerable medical device |
US5037391A (en) * | 1989-01-09 | 1991-08-06 | Pilot Cardiovascular Systems, Inc. | Steerable angioplasty device |
US4998916A (en) * | 1989-01-09 | 1991-03-12 | Hammerslag Julius G | Steerable medical device |
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EP0566523B1 (en) | 2000-03-15 |
US4827941A (en) | 1989-05-09 |
EP0566523A1 (en) | 1993-10-20 |
DE3856400D1 (en) | 2000-04-20 |
DE3856400T2 (en) | 2000-12-07 |
JP2781187B2 (en) | 1998-07-30 |
DE3885429T2 (en) | 1994-05-19 |
EP0321796B1 (en) | 1993-11-03 |
DE3885429D1 (en) | 1993-12-09 |
EP0321796B2 (en) | 2001-05-09 |
DE566523T1 (en) | 1994-09-22 |
EP0321796A3 (en) | 1989-11-29 |
JPH024390A (en) | 1990-01-09 |
EP0321796A2 (en) | 1989-06-28 |
AU622122B2 (en) | 1992-04-02 |
AU2665488A (en) | 1989-07-06 |
DE3885429T3 (en) | 2001-10-25 |
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