06299635 is referenced by 177 patents and cites 40 patents.

A radially expandable and contractible surgical stent

10

is provided formed from a shape memory material such as a Nickel-Titanium alloy. The stent

10

includes a series of wave-like struts

20

spaced apart by gaps

60

. Each gap

60

is spanned by tie bars

70

at a maximum

64

width portion of the gap

60

or by an angled link

80

or a straight link

90

at a minimum

62

width portion of a gap

60

. Hence, axial expansion or contraction of the stent

10

is avoided when the stent

10

is radially expanded or contracted. Each strut

20

is formed from a series of substantially linear legs

30

joined together by free bends

40

or attachment bends

50

. The legs

30

and bends

40, 50

can be provided with an enhanced thickness

36

to augment resistance of the stent

10

to fracture when radially expanded or contracted. The stent

10

can be radially contracted to a diameter less than one-fourth of its radially expanded configuration when in a martensite phase. The stent

10

returns to a shape memory austenite phase when the stent

10

is unloaded or loaded below its yield strength and has a temperature above its transition temperature. The stent

10

can thus be easily collapsed and implanted within a body lumen for later radial expansion to support the body lumen.

Title
Radially expandable non-axially contracting surgical stent
Application Number
9/504519
Publication Number
6299635 (B1)
Application Date
February 15, 2000
Publication Date
October 9, 2001
Inventor
John J Frantzen
Laguana Niguel
CA, US
Agent
Anton P Ness
US
Assignee
Cook Incorporated
IN, US
IPC
A61F 2/06
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