EP0405883A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A Pneumoperitoneal needle
Assignee: Rocket of London Ltd
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Filing: 1990-06-25
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Granted: —
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Expires: 2010-06-25
Abstract
Abstract A pneumoperitoneal needle (1) is described which comprises a hollow needle (2) for penetrating a body cavity and a hollow obturator (3) having a blunt tip (30) and through which a fluid may be transferred to and from the body cavity. The obturator (3) is mounted within the needle (2) and is linearly movable between a first position in which the blunt tip (30) of the obturator (3) extends beyond the tip (40) of the needle (2) and a second position in which the tip (40) of the needle (2) extends beyond the tip (30) of the obturator (3). There is also biassing means (7) which biasses the obturator (3) to the first position and the biassing means (7) is such that during penetration of the body cavity the resistance is sufficient to overcome the biassing means (7) and move the obturator (3) from the first position to the second position. After the body cavity has been penetrated the obturator (3) returns to the first position under the action of the biasing means (7). The obturator (3) is rotatable within the needle (2) and has through its wall at least two apertures (31, 32) adjacent to the tip (30) of the obturator (3) so that when the obturator (3) is in the first position fluid may pass through at least one of the apertures (31, 32) irrespective of the orientation of the obturator (3) relative to the needle (2). There is also a visual indicating means (5, 6) which indicates whether or not the obturator (3) is in the first position.
Inventors
- 👤 Richard Robson
- 👤 Hadyn Meredith
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 05:20
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/34; A61B17/3494; A61B17/3496; A61B17/3474; A61B90/00; A61B90/08; A61B2090/0801; A61B2090/08021
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
234 words
A pneumoperitoneal needle comprising a hollow needle (2) for penetrating a body cavity, a hollow obturator (3) having a blunt tip (30) and through which a fluid may be transferred to or from the body cavity, the obturator (3) being mounted within the needle (2) and linearly movable between a first position in which the blunt tip (30) of the obturator extends beyond the tip (40) of the needle (2) and a second position in which the tip (40) of the needle (2) extends beyond the tip (30) of the obturator (3), and biassing means (7) to bias the obturator (3) to the first position, the biassing means (7) being such that during penetration of the body cavity the resistance is sufficient to overcome the biassing means (7) and move the obturator (3) from the first position to the second position and such that after the body cavity has been penetrated the obturator (3) returns to the first position under the action of the biassing means (7), and wherein the obturator (3) is rotatable within the needle (2) and has through its wall at least two apertures (31, 32) adjacent to the tip (30) of the obturator (3) such that when the obturator (3) is in the first position fluid may pass through at least one of the apertures (31, 32) irrespective of the orientation of the obturator (3) relative to the needle (2).
Claim 2
Dependent Claim
234 words
A pneumoperitoneal needle comprising a hollow needle (2) for penetrating a body cavity, a hollow obturator (3) having a blunt tip (30) and through which a fluid may be transferred to or from the body cavity, the obturator (3) being mounted within the needle (2) and linearly movable between a first position in which the blunt tip (30) of the obturator extends beyond the tip (40) of the needle (2) and a second position in which the tip (40) of the needle (2) extends beyond the tip (30) of the obturator (3), and biassing means (7) to bias the obturator (3) to the first position, the biassing means (7) being such that during penetration of the body cavity the resistance is sufficient to overcome the biassing means (7) and move the obturator (3) from the first position to the second position and such that after the body cavity has been penetrated the obturator (3) returns to the first position under the action of the biassing means (7), and wherein the obturator (3) is rotatable within the needle (2) and has through its wall at least two apertures (31, 32) adjacent to the tip (30) of the obturator (3) such that when the obturator (3) is in the first position fluid may pass through at least one of the apertures (31, 32) irrespective of the orientation of the obturator (3) relative to the needle (2).
Claim 3
Dependent Claim
23 words
A pneumoperitoneal needle according to Claim 1, wherein there are two apertures (31, 32) postioned diametrically opposite each other on the obturator (3).
Claim 4
Dependent Claim
29 words
A pneumoperitoneal needle according to Claim 1 or Claim 2, wherein there are two apertures (31, 32) laterally offset from each other along the length of the obturator (3).
Claim 5
Dependent Claim
36 words
A pneumoperitoneal needle according to any of the preceding Claims, wherein the area of aperture through which fluid may pass remains substantially independent of the rotational position of the obturator (3) relative to the needle (2).
Claim 6
Dependent Claim
191 words
A pneumoperitoneal needle comprising a hollow needle (2) for penetrating a body cavity, a hollow obturator (3) having a blunt tip (30) and through which a fluid may be transferred to or from the body cavity, the obturator (3) being mounted within the needle (2) and linearly movable between a first position in which the blunt tip (30) of the obturator (3) extends beyond the tip (40) of the needle (2) and a second position in which the tip (40) of the needle (2) extends beyond the tip (30) of the obturator (3), and biassing means (2) to bias the obturator (3) to the first position, the biassing means (7) being such that during penetration of the body cavity the resistance is sufficient to overcome the biassing means (7) and move the obturator (3) from the first position to the second position and such that after the body cavity has been penetrated the obturator (3) returns to the first position under the action of the biassing means (7), the pneumoperitoneal needle further comprising visual indicating means (5, 6) to indicate whether or not the obturator (3) is in the first position.
Claim 7
Dependent Claim
191 words
A pneumoperitoneal needle comprising a hollow needle (2) for penetrating a body cavity, a hollow obturator (3) having a blunt tip (30) and through which a fluid may be transferred to or from the body cavity, the obturator (3) being mounted within the needle (2) and linearly movable between a first position in which the blunt tip (30) of the obturator (3) extends beyond the tip (40) of the needle (2) and a second position in which the tip (40) of the needle (2) extends beyond the tip (30) of the obturator (3), and biassing means (2) to bias the obturator (3) to the first position, the biassing means (7) being such that during penetration of the body cavity the resistance is sufficient to overcome the biassing means (7) and move the obturator (3) from the first position to the second position and such that after the body cavity has been penetrated the obturator (3) returns to the first position under the action of the biassing means (7), the pneumoperitoneal needle further comprising visual indicating means (5, 6) to indicate whether or not the obturator (3) is in the first position.
Claim 8
Dependent Claim
20 words
A pneumoperitoneal needle according to Claim 5, wherein the indicating means comprises a member (5, 6) having two codes thereon.
Claim 9
Dependent Claim
15 words
A pneumoperitoneal needle according to Claim 6, wherein the two codes are strongly contrasting colours.
Claim 10
Dependent Claim
115 words
A pneumoperitoneal needle according to Claim 6 or Claim 7, wherein the member (5, 6) is movable with the obturator (3) and the needle (2) further comprises a viewing aperture or window (50) located in a handle (8) attached to the hollow needle (2), wherein the coded member (5, 6) is only partly visible through the viewing aperture or window (50) in the handle (8), and wherein when the obturator (3) is in the first position only one code on the coded member (5, 6) is substantially visible through the aperture or window (50) and when the obturator is not in the first position the other code is visible through the aperture or window (50).
Claim 11
Dependent Claim
53 words
A pneumoperitoneal needle according to Claim 8, wherein the handle (8) is manufactured from clear plastics material and the surface (51, 52) adjacent to the viewing aperture or window (50) is textured so that the coded members (5, 6) are substantially visible only through viewing aperture or window (50) which is not textured.
Claim 12
Dependent Claim
20 words
A pneumoperitoneal needle according to Claim 8 or Claim 9, wherein the handle (8) comprises two apertures or windows (50).
References Cited (Backward Citations)
No citation records indexed.
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