Patent EP0980677A1 successfully refreshed from Google Patents.
EP0980677A1
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EP
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Cannula for receiving surgical instruments
Assignee: Endius Inc
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Filing: 1999-06-17
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Granted: —
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Expires: 2019-06-17
Abstract
Abstract A cannula (10) receives surgical instruments for performing a surgical procedure on a body. The cannula (10) comprises a tube structure (12) defining a passage (16) through which the surgical instruments are inserted into the body. The tube structure (12) has a proximal end (20) and a distal end (62). The tube structure (12) includes an expandable portion (40) for enabling an increase in the cross-sectional area of the passage (16) at the distal end (62). The expandable portion (40) of the tube structure (12), when expanded, has a conical configuration.
Inventors
- 👤 Thomas W. Davison
- 👤 Timothy E. Taylor
- 👤 Adam Sher
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 15:55
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/34; A61B17/3417; A61B17/3421; A61B17/02; A61B17/0218; A61B17/16; A61B17/17; A61B17/1739; A61B17/1757; A61B17/32; A61B17/320016; A61B17/32002; A61B17/3439; A61B17/0293; A61B17/1735; A61B17/28; A61B17/2812; A61B17/282; A61B17/29; A61B17/00234; A61B2017/00238; A61B2017/00261; A61B2017/0046
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
76 words
A cannula for receiving surgical instruments
for performing a surgical procedure on a body, said cannula
comprising: a tube structure defining a passage extending
through the tube structure and through which the surgical
instruments are inserted into the body, said tube
structure having a proximal end and a distal end, said tube structure including an expandable
portion for enabling an increase in the cross-sectional
area of said passage at said distal end of said tube
structure.
Claim 2
Dependent Claim
19 words
The cannula of claim 1 wherein said expandable
portion of said tube structure, when expanded, has a
conical configuration.
Claim 3
Dependent Claim
60 words
The cannula of claim 1 wherein said expandable
portion of said tube structure has an arcuate slot and a
guide pin disposed in said arcuate slot, said guide pin
being movable from a terminal end of said slot to a second
terminal end of said slot to enable the cross-sectional
area of said passage at said distal end to increase.
Claim 4
Dependent Claim
13 words
The cannula of claim 1 wherein said tube
structure is made of metal.
Claim 5
Dependent Claim
35 words
The cannula of claim 1 wherein said
expandable portion is expandable from a contracted
condition to an expanded condition to increase the
cross-sectional area of said passage at said distal end
of said tube structure.
Claim 6
Dependent Claim
33 words
The cannula of claim 5 further comprising
means for maintaining said expandable portion in said
contracted condition, said means being manually
actuatable to release said expandable portion for
expansion from said contracted condition.
Claim 7
Dependent Claim
42 words
The cannula of claim 5 further comprising
means for expanding said expandable portion from said
contracted condition to said expanded condition, said
means being insertable into said passage and actuatable
to apply a radially outwardly directed force to expand
said expandable portion.
Claim 8
Dependent Claim
27 words
The cannula of claim 1 wherein said tube
structure includes first and second tubular portions
attached to one another, said second tubular portion
comprising said expandable portion.
Claim 9
Dependent Claim
36 words
The cannula of claim 8 wherein said first
tubular portion comprises a length of stainless steel
tubing and said second tubular portion comprises an
arcuate segment of stainless steel sheet stock rolled
into a tubular shape.
Claim 10
Dependent Claim
104 words
A cannula for receiving surgical instruments,
said cannula comprising: a first tubular portion defining a first
passage for receiving the surgical instruments, said
first passage having a first diameter, said first
tubular portion having a proximal end and a distal end;
and a second tubular portion attached to said
distal end of said first tubular portion and defining a
second passage for receiving the surgical instruments,
said second passage being a continuation of said first
passage, said second tubular portion being
diametrically expandable to enable enlargement of said
second passage to a size which is greater than said
first diameter of said first passage.
Claim 11
Dependent Claim
31 words
The cannula of claim 10 wherein said second
tubular portion has oppositely disposed first and
second ends, said first end being attached to said
distal end of said first tubular portion.
Claim 12
Dependent Claim
45 words
The cannula of claim 11 wherein said second
passage at said second end of said second tubular
portion, when said second tubular portion is expanded,
has a second diameter which is greater than said first
diameter of said first passage in said first tubular
portion.
Claim 13
Dependent Claim
42 words
The cannula of claim 12 wherein said second
diameter of said second passage at said second end of
said second tubular portion, when said second tubular
portion is expanded, is 40% to 80% larger than said
first diameter of said first passage.
Claim 14
Dependent Claim
20 words
The cannula of claim 10 wherein said second
passage, when said second tubular portion is expanded,
has a conical configuration.
Claim 15
Dependent Claim
55 words
The cannula of claim 10 wherein said second
tubular portion has an arcuate slot and a guide pin
disposed in said arcuate slot, said guide pin being
movable from a first terminal end of said arcuate slot
to a second terminal end of said arcuate slot to enable
said second tubular portion to expand diametrically.
Claim 16
Dependent Claim
47 words
The cannula of claim 15 wherein said second
tubular portion has first and second ends connected by
a central portion, said first end being attached to
said distal end of said first tubular portion, said
arcuate slot extending circumferentially from said
central portion toward said second end.
Claim 17
Dependent Claim
16 words
The cannula of claim 10 wherein said first
and second tubular portions are made of metal.
Claim 18
Dependent Claim
17 words
The cannula of claim 17 wherein said first
tubular portion comprises a length of stainless steel
tubing.
Claim 19
Dependent Claim
19 words
The cannula of claim 17 wherein said second
tubular portion comprises an arcuate segment of
stainless steel sheet stock.
Claim 20
Dependent Claim
27 words
The cannula of claim 10 wherein said second
tubular portion is expandable from a contracted
condition to an expanded condition to enable
enlargement of said second passage.
Claim 21
Dependent Claim
35 words
The cannula of claim 20 further comprising
means for maintaining said second tubular portion in
said contracted condition, said means being manually
actuatable to release said second tubular portion for
expansion from said contracted condition.
Claim 22
Dependent Claim
44 words
The cannula of claim 20 further comprising
means for expanding said second tubular portion from
said contracted condition to said expanded condition,
said means being insertable into said first passage and
actuatable to apply a radially outwardly directed force
to expand said second passage.
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