EP0139872A1
Expired / Lapsed
EP
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Flashback indicating system
Assignee: Abbott Laboratories
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Filing: 1984-07-18
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Granted: —
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Expires: 2004-07-18
Abstract
Abstract A magnifying element (13) is provided in conjunction with a cannula hub (50) to afford an enlarged visual image of the contents in the passageway (16) of the cannula hub (50). More specifically, magnifying elements (13) are employed in conjunction with a transparent cannula hub (50) to enlarge the flashback of blood through a cannula (10) to indicate proper placement of a cannula (10) into a blood vessel of a patient.
Inventors
- 👤 James Robert Gross
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 06:49
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/06; A61M25/0693; A61B; A61B5/00; A61B5/15; A61B5/150007; A61B5/150015; A61B5/15003; A61B5/150206; A61B5/150259; A61B5/150374; A61B5/150381; A61B5/150389; A61B5/150503; A61B5/150519; A61B5/153; A61B5/1535; A61M2205/00; A61M2205/58; A61M2205/583; A61M2205/585
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
79 words
A flashback indicating system comprising: a cannula hub body defining a chamber; a hollow pointed cannula secured to said hub body and in fluid communication with said chamber; at least a section of said hub body being transparent; and a magnifying element operatively associated with said translucent section of said hub body; whereby said magnifying element enlarges the image of any fluid flowing into said chamber and provides an enlarged visual indication of fluid flow through said hub body.
Claim 2
Dependent Claim
79 words
A flashback indicating system comprising: a cannula hub body defining a chamber; a hollow pointed cannula secured to said hub body and in fluid communication with said chamber; at least a section of said hub body being transparent; and a magnifying element operatively associated with said translucent section of said hub body; whereby said magnifying element enlarges the image of any fluid flowing into said chamber and provides an enlarged visual indication of fluid flow through said hub body.
Claim 3
Dependent Claim
105 words
A flashback indicating system comprising: a cannula; a cannula hub body defining a small diameter portion and a large diameter portion wherein said small diameter portion is constructed and arranged to receive a section of said cannula and said large diameter. portion defines a chamber; at least a portion of said large diameter portion being translucent; and a magnifying element operatively associated with said translucent section of said large diameter portion of said cannula hub body whereby said magnifying element enlarges the image of any fluid flowing into said chamber and provides an enlarged visual indication of fluid flow through said translucent cannula hub body.
Claim 4
Dependent Claim
105 words
A flashback indicating system comprising: a cannula; a cannula hub body defining a small diameter portion and a large diameter portion wherein said small diameter portion is constructed and arranged to receive a section of said cannula and said large diameter. portion defines a chamber; at least a portion of said large diameter portion being translucent; and a magnifying element operatively associated with said translucent section of said large diameter portion of said cannula hub body whereby said magnifying element enlarges the image of any fluid flowing into said chamber and provides an enlarged visual indication of fluid flow through said translucent cannula hub body.
Claim 5
Dependent Claim
17 words
The flashback indicating system as defined in Claim 1 wherein the entire cannula hub body is translucent.
Claim 6
Dependent Claim
23 words
The flashback indicating system as defined in Claim 2 wherein said larger diameter portion of said translucent cannula hub body contains finger stops.
Claim 7
Dependent Claim
30 words
The flashback indicating system as defined in Claim 2 wherein finger stops are placed between said smaller diameter portion and said larger diameter portion of said translucent cannula hub body.
Claim 8
Dependent Claim
17 words
The flashback indicating system as defined in Claim 1 wherein said magnifying element is hemispherical in shape.
Claim 9
Dependent Claim
17 words
The flashback indicating system as defined in Claim 1 wherein said magnifying element is cylindrical in shape.
Claim 10
Dependent Claim
25 words
The flashback indicating system as defined in Claim 2 wherein said magnifying element is the same length as the translucent section of said cannula hub.
Claim 11
Dependent Claim
31 words
The flashback indicating system as defined in Claim 1 wherein said magnifying element is hemispherical in shape and further having a fin extending from said larger portion of said cannula hub.
Claim 12
Dependent Claim
211 words
A flashback system for indicating the presence of a catheter in a blood vessel system comprising: a cannula hub body defining a small diameter portion and a large diameter portion wherein said small diameter portion is constructed and arranged to receive a section of said cannula and said large diameter portion defines a chamber; finger stops places between said smaller diameter portion and said larger diameter portion of said cannula hub body; a catheter constructed and arranged to surround said cannula leaving said sharpened tip exposed; a catheter hub body connected to said catheter which surrounds said small diameter portion of said cannula hub body and further constructed and arranged to be in contact with said finger stops; at least a portion of said larger diameter portion being transparent; a magnifying element operatively associated with said translucent section of said large diameter portion of said cannula hub body; whereby when said cannula is inserted into a blood vessel said magnifying element enlarges the image of the flashback of blood into said chamber thus indicating the proper placement of the catheter into the blood vessel of a patient so that said cannula may be withdrawn from said catheter and catheter hub when said enlarged visual indication of the flashback of blood appears.
Claim 13
Dependent Claim
211 words
A flashback system for indicating the presence of a catheter in a blood vessel system comprising: a cannula hub body defining a small diameter portion and a large diameter portion wherein said small diameter portion is constructed and arranged to receive a section of said cannula and said large diameter portion defines a chamber; finger stops places between said smaller diameter portion and said larger diameter portion of said cannula hub body; a catheter constructed and arranged to surround said cannula leaving said sharpened tip exposed; a catheter hub body connected to said catheter which surrounds said small diameter portion of said cannula hub body and further constructed and arranged to be in contact with said finger stops; at least a portion of said larger diameter portion being transparent; a magnifying element operatively associated with said translucent section of said large diameter portion of said cannula hub body; whereby when said cannula is inserted into a blood vessel said magnifying element enlarges the image of the flashback of blood into said chamber thus indicating the proper placement of the catheter into the blood vessel of a patient so that said cannula may be withdrawn from said catheter and catheter hub when said enlarged visual indication of the flashback of blood appears.
References Cited (Backward Citations)
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