John P Fagan

US Patent:

61969958, Mar 6, 2001

Filed:

Sep 30, 1998

Appl. No.:

9/164009

Inventors:

John R. Fagan - Pepperell MA

Assignee:

Medtronic AVE, Inc. - Santa Rosa CA

International Classification:

A61M 2900

US Classification:

604 9601

Abstract:

The invention relates to a catheter and guidewire exchange system in which the guidewire is contained within an indwelling portion of the catheter and with the guidewire and the catheter being separated externally of the patient. The catheter includes a guidewire lumen and a longitudinal slit which penetrates through the catheter wall and into the guidewire lumen. The catheter walls adjacent the slit are provided with reinforced edges which function to maintain the slit in a normally closed position during the catheterization procedure, when desired.

US Patent:

58580077, Jan 12, 1999

Filed:

Jul 3, 1996

Appl. No.:

8/675220

Inventors:

John R. Fagan - Pepperell MA
John Zhang - Arlington MA

Assignee:

C. R. Bard, Inc. - Murray Hill NJ

International Classification:

A61M 500

US Classification:

604256

Abstract:

A self-sealing hemostatic valve for use in a catheter apparatus is disclosed, comprising a proximal valve element having a sealing hole, a distal valve element having a flap and biasing means to enhance the force with which the flap bears against the distal side of the proximal valve element to normally seal the hole. The sealing hole seals about an instrument passed through the valve and the flap seals the valve when no instrument is present. The proximal face of the proximal valve element is provided with discontinuities that increase the flexibility of the proximal valve element in a distal direction.

US Patent:

57158177, Feb 10, 1998

Filed:

Jun 7, 1995

Appl. No.:

8/478206

Inventors:

John R. Fagan - Pepperell MA
Dino F. Cuscuna - Reading MA
Sarkis Karakozian - Belmont MA

Assignee:

C.R. Bard, Inc. - Murray Hill NJ

International Classification:

A61B 5042
A61N 105

US Classification:

128642

Abstract:

A bidirectional steering catheter comprising a distal electrode assembly, a flexible tip assembly, an elongated shaft having a central lumen running the length of the shaft, and a handle/actuator. A plurality of ring electrodes are attached to the surface of the flexible tip assembly. Signal wires running the length of the catheter are electrically connected to each ring electrode. At least two pull cables having first and second ends extend distally through the central lumen. The first end of each pull cable is attached to the handle/actuator. The second end of each pull cable is attached to the distal electrode assembly, such that the distal electrode assembly may be moved between a first and a second position within a single plane by manipulating the handle/actuator. At least two reinforcement members are located inside the flexible tip assembly. Each reinforcement member has a proximal section, a middle section and a distal section.

US Patent:

57203008, Feb 24, 1998

Filed:

Feb 21, 1995

Appl. No.:

8/391010

Inventors:

John R. Fagan - Pepperell MA
Lex P. Jansen - Londonderry NH
L. Ven Raman - Framingham MA
John A. Wright - Arlington MA

Assignee:

C. R. Bard, Inc. - Murray Hill NJ

International Classification:

A61B 500

US Classification:

128772

Abstract:

An elongate flexible wire-like medical device, such as a guidewire for use with a catheter, is formed with a shaft in which the difference between the magnitude of the tensile yield stress and compressive yield stress of the shaft is substantially reduced. The guidewire exhibits superior kink resistance without compromising other desirable characteristics and enables a guidewire to be made in a smaller diameter without loss of performance. The guidewire shaft may be formed from a precipitation hardenable alloy such as an alloy of nickel, cobalt, molybdenum and chromium (MP35N and Elgiloy), 455PH stainless steel or stainless steel alloy 1RK91. Also disclosed is a process for increasing the modulus of elasticity of an alloy of nickel, cobalt molybdenum and chromium. Further, the disclosure relates to an improved management and manufacturing process for constructing the tip of a medical guidewire.

US Patent:

52697576, Dec 14, 1993

Filed:

Dec 2, 1991

Appl. No.:

7/801449

Inventors:

John R. Fagan - Pepperell MA
John A. Wright - Arlington MA

Assignee:

C. R. Bard, Inc. - Murray Hill NJ

International Classification:

A61M 3700

US Classification:

604 95

Abstract:

A catheter with an integral steerable guidewire converts linear movement of the guidewire to rotational movement at the distal end of the guidewire. The catheter has a guidewire lumen to receive the guidewire. The catheter and guidewire are constructed so that the guidewire can be reciprocated and rotated with respect to the catheter. The guidewire and catheter cooperate in a manner so that when the guidewire is reciprocated axially with respect to the catheter, that axial movement of the guidewire is converted into rotational movement.

US Patent:

56455291, Jul 8, 1997

Filed:

Mar 14, 1994

Appl. No.:

8/213463

Inventors:

John R. Fagan - Pepperell MA
Jeffrey M. Kling - Tewksbury MA
Michael D. Barbere - Dunstable MA

Assignee:

C. R. Bard, Inc. - Murray Hill NJ

International Classification:

A61M 2900

US Classification:

604101

Abstract:

Devices have been made which are balloon catheters, preferably PTCA devices, and which are capable of selectively directing inflation forces against the thicker part of an eccentric arterial obstruction or an off-center plaque deposit. In a first embodiment, a balloon catheter is formed from at least two balloons positioned side-by-side to each other. One balloon is larger in diameter than the other balloon(s). The larger diameter balloon acts as a cushion to the thinner part of a lesion. The small balloon(s) focuses greater inflation force against the thicker part of the lesion. In a second embodiment, a unitary balloon catheter has a plurality of independently inflatable lobes. Inflation forces may be selectively directed depending on which lumen of the balloon catheter is pressurized. Additionally, different lumens can be used for other purposes including an auto-perfusion catheter and monorail applications. The new devices provide a method of opening a constricted region in the cardiovascular system of a patient.

US Patent:

62069152, Mar 27, 2001

Filed:

Sep 29, 1998

Appl. No.:

9/162540

Inventors:

John R. Fagan - Pepperell MA
Chirag B. Shah - Nashua NH

Assignee:

Medtronic AVE, Inc. - Santa Rosa CA

International Classification:

A61F2/04

US Classification:

623 142

Abstract:

A drug storing and metering stent for placement within a vessel comprising an outer member having a lumen, an inner member positioned within the lumen of the outer member. A space separates the inner member from the outer member and within which space a therapeutic drug is disposed. The stent includes at least one protrusion provided on at least one of the inner and outer members and extending across the space so as to cause a friction fit between the inner and outer members. The stent also includes a pattern of perforation across both the inner and outer members to permit the stent to expand radially. The invention also relates to a method of making such a stent, and a method of releasing a therapeutic drug within a vessel.

US Patent:

61135577, Sep 5, 2000

Filed:

Jun 20, 1997

Appl. No.:

8/879569

Inventors:

John R. Fagan - Pepperell MA
Richard Choh - Lowell MA
Richard Morrill - Billerica MA

Assignee:

Medtronic AVE, Inc. - Santa Rosa CA

International Classification:

A61B 500

US Classification:

600585

Abstract:

An angioplasty guidewire includes a proximal shaft and an intermediate section extending from the shaft to a distal joint and having a stiffener and a flexible member. The stiffener and the flexible member are disposed in coaxial slidable relationship and operable, as the stiffener and flexible member undergo relative axial shifting, to cooperatively impart a variable stiffening force on the intermediate section. A flexible distal tip mounts to the end of the intermediate section and projects axially therefrom.