US4448188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for providing an oxygen bearing liquid to a blood vessel for the performance of a medical procedure
Assignee: Laserscope Inc
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Filing: 1982-02-18
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Granted: 1984-05-15
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Expires: 2002-02-18
Abstract
Abstract A method for providing an oxygen bearing liquid to a blood vessel during the performance of a medical procedure is disclosed. In one preferred embodiment the blood flow is temporarily occluded, a substantially clear oxygen bearing liquid is introduced into the blood vessel and the inside of the blood vessel is inspected through a viewing system and treated with laser irradiation.
Inventors
- 👤 Marvin P. Loeb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:22
CPC Classifications
A; A61; A61B; A61B10/00; A61B10/02; A61B18/00; A61B18/18; A61B18/20; A61B18/22; A61B18/24; A61B18/245; A61B17/00; A61B17/22; A61B2017/22051; A61M; A61M2202/00; A61M2202/04; A61M2202/0468; A61M2202/0476
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
93 words
A method for obtaining access to a site in a blood vessel for the performance of a medical procedure, the method comprising the steps of: (a) temporarily occluding the blood vessel by introducing therein, upstream of the site, removable flow occluding means; (b) introducing downstream of the flow occluding means a physiologically compatible liquid, from an external source, bearing sufficient available oxygen to maintain the viability of tissue downstream of the flow obstruction means while the blood vessel is occluded; and (c) positioning operative means adjacent the site for performing the medical procedure.
Claim 2
Independent Claim
93 words
A method for obtaining access to a site in a blood vessel for the performance of a medical procedure, the method comprising the steps of: (a) temporarily occluding the blood vessel by introducing therein, upstream of the site, removable flow occluding means; (b) introducing downstream of the flow occluding means a physiologically compatible liquid, from an external source, bearing sufficient available oxygen to maintain the viability of tissue downstream of the flow obstruction means while the blood vessel is occluded; and (c) positioning operative means adjacent the site for performing the medical procedure.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein the oxygen bearing liquid is substantially clear.
Claim 4
Dependent Claim
17 words
The method of claim 1 wherein oxygen bearing liquid is a water based emulsion of a perfluorocarbon.
Claim 5
Dependent Claim
12 words
The method of claim 1 wherein the oxygen bearing liquid includes blood.
Claim 6
Dependent Claim
40 words
The method of claim 1 wherein the operative means includes a laser light transmitting fiber and the method includes introducing a substantially clear flushing fluid into the blood vessel during at least part of the performance of the medical procedure.
Claim 7
Dependent Claim
34 words
The method of claim 1 wherein a substantially clear flushing fluid is introduced into the blood vessel downstream of the flow occluding means during at least part of the performance of the medical procedure.
Claim 8
Dependent Claim
11 words
The method of claim 6 wherein the flushing fluid is saline.
Claim 9
Dependent Claim
12 words
The method of claim 6 wherein the flushing fluid is carbon dioxide.
Claim 10
Dependent Claim
11 words
The method of claim 6 wherein the flushing fluid includes blood.
Claim 11
Dependent Claim
19 words
The method of claim 6 wherein the flushing fluid is a substantially clear water based emulsion of a perflurocarbon.
Claim 12
Dependent Claim
12 words
The method of claim 6 wherein a flushing fluid is introduced intermittently.
Claim 13
Dependent Claim
44 words
The method of claim 1 wherein said medical procedure is the removal of a deposit at the site and the operative means includes a laser light transmitting fiber for directing laser irradiation at the site to remove at least a portion of the deposit.
Claim 14
Dependent Claim
38 words
The method of claim 1 wherein the operative means includes a viewing system and the method includes introducing a substantially clear flushing fluid into the blood vessel during at least part of the performance of the medical procedure.
Claim 15
Dependent Claim
19 words
The method of claim 13 wherein the flushing fluid is a substantially clear, physiologically compatible liquid bearing available oxygen.
Claim 16
Dependent Claim
49 words
The method of claim 13 wherein the medical procedure is the removal of a deposit at the site and the operative means includes a laser light transmitting fiber for directing laser irradiation at the site for a time period sufficient to remove at least a portion of the deposit.
Claim 17
Dependent Claim
25 words
The method of claim 1 wherein the medical procedure is removing tissue from the blood vessel site and the operative means includes tissue collecting means.
Claim 18
Dependent Claim
56 words
The method of claim 16 wherein the tissue collecting means includes a tube and wherein the medical procedure includes placing the end of the tube in contact with the tissue, introducing a negative pressure within the tube to grasp the tissue, and retracting the tube from the site to remove the tissue from the blood vessel.
Claim 19
Dependent Claim
26 words
The method of claim 1 wherein the oxygen bearing liquid is a water-based emulsion of a perfluorocarbon having an average particle size below about 0.2 micrometer.
Claim 20
Dependent Claim
16 words
The method of claim 1 wherein a plurality of oxygen bearing liquids is introduced in sequence.
Claim 21
Independent Claim
161 words
A method of treating a site in a blood vessel with laser irradiation, the method comprising the steps of: (a) positioning within the blood vessel, proximate the site, the distal end of a conduit carrying a viewing system and means for emitting laser irradiation from the distal end of the conduit; (b) temporarily occluding the blood vessel upstream of the of the site; (c) introducing downstream of the produced occlusion and about the site a physiologically compatible liquid, from an external source, bearing sufficient available oxygen to maintain the viability of tissue downstream of the occlusion while the blood vessel is occluded; (d) positioning the distal end of the conduit adjacent the site such that the site can be viewed through the viewing system when the physiologically compatible oxygen bearing fluid is substantially clear; and (e) transmitting laser light through the conduit to subject the site with laser irradiation when the physiologically compatible oxygen bearing is sufficiently transparent to laser energy.
Claim 22
Independent Claim
161 words
A method of treating a site in a blood vessel with laser irradiation, the method comprising the steps of: (a) positioning within the blood vessel, proximate the site, the distal end of a conduit carrying a viewing system and means for emitting laser irradiation from the distal end of the conduit; (b) temporarily occluding the blood vessel upstream of the of the site; (c) introducing downstream of the produced occlusion and about the site a physiologically compatible liquid, from an external source, bearing sufficient available oxygen to maintain the viability of tissue downstream of the occlusion while the blood vessel is occluded; (d) positioning the distal end of the conduit adjacent the site such that the site can be viewed through the viewing system when the physiologically compatible oxygen bearing fluid is substantially clear; and (e) transmitting laser light through the conduit to subject the site with laser irradiation when the physiologically compatible oxygen bearing is sufficiently transparent to laser energy.
Claim 23
Dependent Claim
23 words
The method of claim 20 wherein the oxygen bearing liquid is introduced as a stream from a fluid passageway upstream of the site.
Claim 24
Dependent Claim
12 words
The method of claim 20 wherein the oxygen bearing liquid includes blood.
Claim 25
Dependent Claim
18 words
The method of claim 20 wherein the oxygen bearing liquid is a water based emulsion of a perfluorocarbon.
Claim 26
Dependent Claim
17 words
The method of claim 23 wherein the emulsion has an average particle size below about 0.2 micrometers.
Claim 27
Dependent Claim
35 words
The method of claim 20 wherein a substantially clear flushing fluid is introduced into the blood vessel downstream of the fluid occluding means for at least a portion of the performance of the medical procedure.
Claim 28
Dependent Claim
11 words
The method of claim 25 wherein the flushing fluid is saline.
Claim 29
Dependent Claim
12 words
The method of claim 25 wherein the flushing fluid is carbon dioxide.
Claim 30
Dependent Claim
11 words
The method of claim 25 wherein the flushing fluid includes blood.
Claim 31
Dependent Claim
12 words
The method of claim 25 wherein a flushing fluid is introduced intermittently.
Claim 32
Dependent Claim
16 words
The method of claim 20 wherein a plurality of oxygen bearing fluids is introduced in sequence.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-15 | 1987-11-14 | 1988-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-15 | 1991-11-14 | 1992-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-15 | 1995-11-14 | 1996-05-15 | $7700.00 | Window Closed / Lapsed |