EP0362462A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Medical peel away sheath and method of making the same
Assignee: Catheter Technology Corp
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Filing: 1989-03-17
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Granted: —
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Expires: 2009-03-17
Abstract
Abstract A co-material peel away hollow sheath (10) for temporarily creating a passageway into a desired body site of a patient for placement of one end of an indwelling device (16) at the body site through the sheath, the sheath wall (28) comprising two opposed axially-directed wall segments (36, 38) formed of material which has a relatively low resistance to shear, the remainder (40, 42) of the wall comprising material having a relatively high resistance to shear such that the sheath manually tears axially along the low shear resistant segments into two pieces for removal from the indwelling device.
Inventors
- 👤 Harvey Robert Moorehead
- 👤 Thomas A. Wiita
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 05:14
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/06; A61M25/0662; A61M25/0668
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
160 words
A peel away hollow sheath (10) for temporarily creating a passageway to a desired body site of a patient for placement of one end of an indwelling device at the body site through the sheath, the sheath comprising: tube means (20) having a proximal end (22), a distal end (24) and wall means (28) defining a hollow interior (34), the wall means (28) comprising at least two opposed axially-directed wall segments (36, 38) formed of material which has a relatively low resistance to shear and the remainder (40, 41) of the wall means being formed of material which has a relatively high resistance to shear; and opposed first and second grasping means (46, 41) carried by the remainder (40, 42) of the wall means at the proximal end (22) of the tube means (20) whereby manually pulling the grasping means (46, 48) apart tears the tube means (20) into two pieces axially along the low shear resistant segments (36, 38).
Claim 2
Dependent Claim
160 words
A peel away hollow sheath (10) for temporarily creating a passageway to a desired body site of a patient for placement of one end of an indwelling device at the body site through the sheath, the sheath comprising: tube means (20) having a proximal end (22), a distal end (24) and wall means (28) defining a hollow interior (34), the wall means (28) comprising at least two opposed axially-directed wall segments (36, 38) formed of material which has a relatively low resistance to shear and the remainder (40, 41) of the wall means being formed of material which has a relatively high resistance to shear; and opposed first and second grasping means (46, 41) carried by the remainder (40, 42) of the wall means at the proximal end (22) of the tube means (20) whereby manually pulling the grasping means (46, 48) apart tears the tube means (20) into two pieces axially along the low shear resistant segments (36, 38).
Claim 3
Dependent Claim
44 words
A peel away sheath according to claim 1, wherein the low shear resistant segments (36, 38) are formed of a first synthetic resinous material and the high shear resistant remainder (40, 42) of the wall means is formed of a second synthetic resinous material.
Claim 4
Dependent Claim
32 words
A peel away sheath according to claim 1 or 2, wherein the low shear resistant segments (36, 38) are co-extruded with the high shear resistant remainder (40, 42) of the wall means.
Claim 5
Dependent Claim
37 words
A peel away sheath according to claim 1 or 2, wherein the low shear resistant segments (36, 38) are axially joined to the high shear resistant remainder (40, 42) of the wall means by tee-joint connecting means.
Claim 6
Dependent Claim
82 words
A peel away sheath according to claim 1, wherein the low shear resistant segments (36, 38) and the high shear resistant remainder (40, 42) of the wall means are made from the same synthetic resinous material with a shear strength increasing additive added to the material from which the high shear resistant remainder (40, 42) of the wall means is formed and/or a shear strength reducing additive added to the material from which the low shear resistant segments (36, 38) are formed.
Claim 7
Dependent Claim
35 words
A peel away sheath acording to claim 5, wherein the material forming the high shear resistant remainder (40, 42) of the wall means contains calcium carbonate or talc in the range of 1-20% by weight.
Claim 8
Dependent Claim
31 words
A peel away sheath according to claim 5 or 6, wherein the material forming the low shear resistant segments contains calcium carbonate or talc in the range of 30-75% by weight.
Claim 9
Dependent Claim
25 words
A peel away sheath according to claim 5, wherein the material from which the low shear resistant segments (36, 38) are formed contains plasticizer means.
Claim 10
Dependent Claim
25 words
A peel away sheath according to claim 5, wherein the material from which the low shear resistant segments (36, 38) are formed contains radiopaquing means.
Claim 11
Dependent Claim
24 words
A peel away sheath according to claim 5, wherein the material from which the low shear resistant segments (36, 38) are formed contains barium.
Claim 12
Dependent Claim
17 words
A peel away sheath according to any preceding claim, wherein the wall means are selectively colour coded.
Claim 13
Independent Claim
114 words
A method of making a peel away hollow sheath (10) used to temporarily create a passageway into a desired body site of a patient for placement of one end of an indwelling device at the body site through the sheath, comprising the steps of: forming at least two opposed axially-directed wall segments (36, 38) of wall means (20) of the hollow sheath from material which has a relatively low resistance to shear and forming the remainder (40, 42) of the wall means from material having a relatively high resistance to shear, whereby oppositely pulling the remainder of the wall means tears the tube means into two pieces axially along the low shear resistant segments.
Claim 14
Independent Claim
114 words
A method of making a peel away hollow sheath (10) used to temporarily create a passageway into a desired body site of a patient for placement of one end of an indwelling device at the body site through the sheath, comprising the steps of: forming at least two opposed axially-directed wall segments (36, 38) of wall means (20) of the hollow sheath from material which has a relatively low resistance to shear and forming the remainder (40, 42) of the wall means from material having a relatively high resistance to shear, whereby oppositely pulling the remainder of the wall means tears the tube means into two pieces axially along the low shear resistant segments.
Claim 15
Dependent Claim
29 words
A method according to claim 12, comprising forming low shear resistant segments (36, 38) and the high shear resistant remainder of the wall means by simultaneous or staggered co-extrusion.
Claim 16
Dependent Claim
41 words
A method according to claim 12, comprising forming the low shear resistant segments (36, 38) independently of the remainder (40, 42) of the wall means and then joining the separate low shear resistant segments to the remainder of the wall means.
Claim 17
Dependent Claim
45 words
A method according to claim 12, 13 or 14, comprising using a first synthetic resinous material to form the low shear resistant segments (36, 38) and using a second synthetic resinous material to form the high shear resistant remainder (40, 42) of the wall means.
Claim 18
Dependent Claim
78 words
A method according to claim 12, 13 or 14, comprising using the same synthetic resinous material to form the low shear resistant segments (36, 38) and the high shear resistant remainder (40, 42) of the wall means, and adding a shear strength increasing additive to the material from which the high shear resistant remainder of the wall means is formed and/or a shear strength reducing additive to the material from which the low shear resistant segments are formed.
Claim 19
Dependent Claim
37 words
A method according to claim 16, comprising adding talc or calcium carbonate within the range of 1-20% by weight to the material from which the high shear resistant remainder (40, 42) of the wall means is formed.
Claim 20
Dependent Claim
35 words
A method according to claim 16 or 17 comprising adding talc or calcium carbonate within the range of 30-75% by weight to the material from which the low shear resistant segments (36, 38) are formed.
Claim 21
Dependent Claim
25 words
A method according to claim 16, comprising adding a plasticizer material to the material from which the low shear resistant segments (36, 38) are formed.
Claim 22
Dependent Claim
25 words
A method according to claim 16, comprising adding a radiopaquing means to the material from which the low shear resistant segments (36, 38) are formed.
References Cited (Backward Citations)
No citation records indexed.
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