Patent US3023447A successfully refreshed from Google Patents.
Patent US5287857A successfully refreshed from Google Patents.
US5287857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for obtaining an arterial biopsy
Assignee: CARDIO DYNAMICS
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Filing: 1992-06-22
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Granted: 1994-02-22
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Expires: 2012-06-22
Abstract
Abstract An arterial biopsy catheter for obtaining a biopsy sample from the inner layers of an artery includes an outer tube and an inner tube slidingly mounted within the outer tube. The inner tube is formed with a closed distal end having a beveled opening. The outer tube is formed with an open distal end having a sharpened circumferential edge adapted to cut arterial material in contact with the beveled opening by sliding the outer tube over the inner tube. The inner tube and outer tube are attached to handles for manipulation by an operator. In use, a vacuum is applied through the inside diameter of the inner tube to the beveled opening, to draw arterial material into contact with the beveled opening. The outer tube is then manipulated to sever the arterial material to form the biopsy sample. The inner and outer tubes are then withdrawn from the artery with the biopsy material held in the beveled opening.
Inventors
- 👤 David Mann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:12
CPC Classifications
A; A61; A61B; A61B10/00; A61B10/02; A61B10/04; A61M; A61M25/00; A61M25/0021; A61M25/0041
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
131 words
A catheter for insertion into an artery for obtaining a tissue sample from an arterial wall of a living being comprising: a substantially flexible outer tube formed with an open distal end having a sharpened edge; a substantially flexible inner tube slidably mounted within the outer tube and having a closed distal end and an opening formed to an inside diameter thereof; means for applying a vacuum through the opening in the distal end of the inner tube for drawing tissue into contact with the opening; and means for moving the sharpened edge of the outer tube over the opening in the inner tube to cut a tissue sample with the tissue sample retained within the opening and protected by the outer tube for withdrawing the tissue sample from the artery.
Claim 2
Dependent Claim
131 words
A catheter for insertion into an artery for obtaining a tissue sample from an arterial wall of a living being comprising: a substantially flexible outer tube formed with an open distal end having a sharpened edge; a substantially flexible inner tube slidably mounted within the outer tube and having a closed distal end and an opening formed to an inside diameter thereof; means for applying a vacuum through the opening in the distal end of the inner tube for drawing tissue into contact with the opening; and means for moving the sharpened edge of the outer tube over the opening in the inner tube to cut a tissue sample with the tissue sample retained within the opening and protected by the outer tube for withdrawing the tissue sample from the artery.
Claim 3
Dependent Claim
46 words
A catheter as claimed in claim 1 and wherein the opening in the inner tube has a beveled exterior surface to form an area for contact with the tissue that is larger than an aperture of the opening to the inside diameter of the inner tube.
Claim 4
Dependent Claim
35 words
A catheter as claimed in claim 2 and wherein the means for moving the sharpened edge of the outer tube over the opening in the inner tube includes a handle attached to the outer tube.
Claim 5
Dependent Claim
35 words
A catheter as claimed in claim 3 and wherein the means for moving the sharpened edge of the outer tube over the opening in the inner tube includes a handle attached to the inner tube.
Claim 6
Dependent Claim
30 words
A catheter as claimed in claim 2 and wherein the means for applying a vacuum includes a tube fitting in fluid communication with an inside diameter of the inner tube.
Claim 7
Dependent Claim
212 words
A catheter for insertion into an artery of a living being for obtaining a biopsy sample from an inner layer of an arterial wall, comprising: a substantially flexible inner tube having a suction tip formed at a closed distal end and including an opening in fluid communication with an inside diameter of the inner tube with the opening formed with an outer periphery on an outer surface of the inner tube and with the opening larger than an aperture to the inside diameter thereof; a substantially flexible outer tube slidably mounted over the inner tube and formed with a cutter tip at an open distal end sized to slide over the inner tube and cut tissue in contact with the opening in the inner tube; an inner tube handle attached to the inner tube and an outer tube handle attached to the outer tube for manipulating the catheter and the inner and outer tubes relative to one another; and means for applying a vacuum to the inside diameter of the inner tube and through the opening to draw tissue into contact with the opening for cutting by the cutter tip with the tissue sample retained in the opening and protected by the outer tube for withdrawing the tissue sample from the artery.
Claim 8
Dependent Claim
212 words
A catheter for insertion into an artery of a living being for obtaining a biopsy sample from an inner layer of an arterial wall, comprising: a substantially flexible inner tube having a suction tip formed at a closed distal end and including an opening in fluid communication with an inside diameter of the inner tube with the opening formed with an outer periphery on an outer surface of the inner tube and with the opening larger than an aperture to the inside diameter thereof; a substantially flexible outer tube slidably mounted over the inner tube and formed with a cutter tip at an open distal end sized to slide over the inner tube and cut tissue in contact with the opening in the inner tube; an inner tube handle attached to the inner tube and an outer tube handle attached to the outer tube for manipulating the catheter and the inner and outer tubes relative to one another; and means for applying a vacuum to the inside diameter of the inner tube and through the opening to draw tissue into contact with the opening for cutting by the cutter tip with the tissue sample retained in the opening and protected by the outer tube for withdrawing the tissue sample from the artery.
Claim 9
Dependent Claim
18 words
A catheter as claimed in claim 6 and wherein the opening is formed with a beveled exterior surface.
Claim 10
Dependent Claim
23 words
A catheter as claimed in claim 7 and wherein the open end of the cutter tip is formed with a sharpened circumferential edge.
Claim 11
Dependent Claim
16 words
A catheter as claimed in claim 8 and wherein the cutter tip is formed of metal.
Claim 12
Dependent Claim
18 words
A catheter as claimed in claim 9 and wherein the outer tube is formed of a polymeric material.
Claim 13
Dependent Claim
16 words
A catheter as claimed in claim 10 and wherein the suction tip is formed of metal.
Claim 14
Dependent Claim
18 words
A catheter as claimed in claim 11 and wherein the inner tube is formed of a polymeric material.
Claim 15
Dependent Claim
34 words
A catheter as claimed in claim 12 and wherein the inner tube is reinforced with a larger diameter tubing at a distal end and the outer tube handle slides over the larger diameter tubing.
Claim 16
Independent Claim
135 words
A method of obtaining a biopsy sample from an inner layer of an arterial wall of an artery of a living being comprising: inserting a catheter into the artery having an inner tube formed with an opening and a closed distal end slidingly mounted to an outer tube formed with an open distal end; positioning the opening of the inner tube outside of a distal end of the outer tube; applying a vacuum to the inner tube to draw and retain arterial wall tissue into the opening formed in the inner tube; sliding the outer tube over the inner tube to cut and protect the tissue retained in the opening; and removing the inner tube and outer tube from the artery with the biopsy sample retained in the opening and protected by the outer tube.
Claim 17
Independent Claim
135 words
A method of obtaining a biopsy sample from an inner layer of an arterial wall of an artery of a living being comprising: inserting a catheter into the artery having an inner tube formed with an opening and a closed distal end slidingly mounted to an outer tube formed with an open distal end; positioning the opening of the inner tube outside of a distal end of the outer tube; applying a vacuum to the inner tube to draw and retain arterial wall tissue into the opening formed in the inner tube; sliding the outer tube over the inner tube to cut and protect the tissue retained in the opening; and removing the inner tube and outer tube from the artery with the biopsy sample retained in the opening and protected by the outer tube.
Claim 18
Dependent Claim
26 words
A method of obtaining a biopsy sample as claimed in claim 14 and wherein the method is used to determine the causes of arterial wall disease.
Claim 19
Dependent Claim
22 words
A method of obtaining a biopsy sample as claimed in claim 14 wherein the opening is formed with a beveled outer surface.
Claim 20
Dependent Claim
29 words
A method of obtaining a biopsy sample as claimed in claim 16 and wherein the outer tube is formed with a sharpened circumferential edge on an open distal end.
Claim 21
Independent Claim
162 words
A method for obtaining a biopsy sample from an artery of a living being comprising: a) inserting a catheter into the artery said catheter including: a substantially flexible outer tube formed with an open distal end having a sharpened edge; a substantially flexible inner tube slidably mounted within the outer tube and having a closed distal end and an opening formed to an inside diameter thereof; means for applying a vacuum through the opening in the distal end of the inner tube for drawing tissue of the arterial wall into contact with the opening; and means for moving the sharpened edge of the outer tube over the opening in the inner tube to cut and retain a tissue sample from the arterial wall; b) contacting the arterial wall with the catheter; c) cutting a biopsy sample from the arterial wall; d) retaining the biopsy sample within the opening formed in the catheter; and e) withdrawing the catheter with the retained biopsy sample.
Claim 22
Independent Claim
162 words
A method for obtaining a biopsy sample from an artery of a living being comprising: a) inserting a catheter into the artery said catheter including: a substantially flexible outer tube formed with an open distal end having a sharpened edge; a substantially flexible inner tube slidably mounted within the outer tube and having a closed distal end and an opening formed to an inside diameter thereof; means for applying a vacuum through the opening in the distal end of the inner tube for drawing tissue of the arterial wall into contact with the opening; and means for moving the sharpened edge of the outer tube over the opening in the inner tube to cut and retain a tissue sample from the arterial wall; b) contacting the arterial wall with the catheter; c) cutting a biopsy sample from the arterial wall; d) retaining the biopsy sample within the opening formed in the catheter; and e) withdrawing the catheter with the retained biopsy sample.
References Cited (Backward Citations)
US3732858A
Cited
US3606878A
Cited
US3830225A
Cited
US3929126A
Cited
US4099518A
Cited
US4249541A
Cited
US4411055A
Cited
US4396021A
Cited
US4617940A
Cited
US4465072A
Cited
US4640296A
Cited
US4620547A
Cited
US4619263A
Cited
US4708147A
Cited
US4641654A
Cited
US4692200A
Cited
US4763668A
Cited
US4877037A
Cited
US4693257A
Cited
US4723936A
Cited
US4790315A
Cited
US4763667A
Cited
US4681123A
Cited
US4793350A
Cited
US4762130A
Cited
US4815478A
Cited
US4925450A
Cited
US4850373A
Cited
US4793351A
Cited
US4867156A
Cited
US4781202A
Cited
US4844087A
Cited
US4819635A
Cited
US4832048A
Cited
US4953559A
Cited
US4887613A
Cited
US4877030A
Cited
US4877031A
Cited
US4961430A
Cited
US4903709A
Cited
US4873991A
Cited
US4932959A
Cited
US5011490A
Cited
US5135483A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-02-21 | 1997-08-23 | 1998-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-21 | 2001-08-23 | 2002-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-21 | 2005-08-23 | 2006-02-22 | $7700.00 | Window Closed / Lapsed |