Patent US2291147A successfully refreshed from Google Patents.
Patent US3609676A successfully refreshed from Google Patents.
US5643254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endovascular embolic device detachment detection method
Assignee: Stryker European Operations Holdings LLC
•
Filing: 1995-11-21
•
Granted: 1997-07-01
•
Expires: 2015-11-21
Abstract
Abstract This invention is a method for ensuring for endovascular occlusion through the formation of thrombi in arteries, veins, aneurysms, vascular malformations, and arteriovenous fistulas. In particular, it deals with a method to predictably determine the instant of electrolytic detachment of an embolic device which is introduced to and is intended to remain at the desired thrombus formation site. The invention further includes a method for delivering an embolic device and detecting its electrolytic separation.
Inventors
- 👤 Ronald W. Scheldrup
- 👤 Laurent B. Schaller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:16
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/12; A61B17/12022; A61B17/12099; A61B17/12109; A61B17/12113; A61B17/12131; A61B17/1214; A61B17/12145; A61B18/00; A61B18/04; A61B18/12; A61B18/1206; A61B2017/00017; A61B2017/00022; A61B2017/00026; A61B2017/00115; A61B2017/00119; A61B2017/00123; A61B2017/1205; A61B2017/12054; A61B2017/12063
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
75 words
A method for detecting electrolytic separation of an occlusion device comprising the steps of: (a) providing a delivery member and an occlusion device coupled to the delivery member via a linking member; (b) delivering the occlusion device to a desired site in a mammal via the delivery member; (c) supplying DC power with a superposed AC signal to the linking member; and (d) monitoring the superposed AC signal to detect a change in said signal.
Claim 2
Independent Claim
75 words
A method for detecting electrolytic separation of an occlusion device comprising the steps of: (a) providing a delivery member and an occlusion device coupled to the delivery member via a linking member; (b) delivering the occlusion device to a desired site in a mammal via the delivery member; (c) supplying DC power with a superposed AC signal to the linking member; and (d) monitoring the superposed AC signal to detect a change in said signal.
Claim 3
Dependent Claim
18 words
The method of claim 1 wherein step (a) includes selecting the occlusion device to be a vasoocclusive coil.
Claim 4
Dependent Claim
20 words
The method of claim 2 wherein step (a) includes selecting the vasoocclusive coil to comprise a radiopaque physiologically compatible material.
Claim 5
Dependent Claim
24 words
The method of claim 3 wherein step (a) includes selecting the material from the group consisting of platinum, tungsten, gold, iridium and alloys thereof.
Claim 6
Dependent Claim
15 words
The method of claim 4 wherein steps (a) includes selecting the material to be platinum.
Claim 7
Dependent Claim
26 words
The method of claim 1 wherein step (c) includes selecting the DC power to provide a voltage in a range of about 0.1 to 6 volts.
Claim 8
Dependent Claim
26 words
The method of claim 1 wherein step (c) includes selecting the DC power to provide constant current in a range of about 0.1 to 10 milliamps.
Claim 9
Dependent Claim
17 words
The method of claim 1 wherein step (a) includes selecting the linking member to be stainless steel.
Claim 10
Dependent Claim
31 words
The method of claim 1 further including the step of interrupting the DC power supply to the linking member in response to detecting a sudden change in the superposed AC signal.
Claim 11
Dependent Claim
68 words
The method of claim 1 wherein the AC signal includes a voltage amplitude and step (d) comprises monitoring the voltage amplitude of the AC signal and further including the steps of averaging the monitored voltage amplitude over time to obtain an average monitored value and interrupting the DC power supply to the linking member when at least about a 20% change from the average monitored value is detected.
Claim 12
Dependent Claim
21 words
The method of claim 1 wherein step (c) includes providing a constant DC current with AC superposition to the linking member.
Claim 13
Dependent Claim
25 words
The method of claim 1 wherein step (a) includes selecting the linking member to have a conductivity that differs from that of the occlusion device.
Claim 14
Dependent Claim
37 words
The method of claim 1 wherein step (a) includes providing a linking member comprising stainless steel and the occlusion device to comprise a material selected from the group consisting of platinum, tungsten, gold, iridium and alloys thereof.
Claim 15
Dependent Claim
17 words
The method of claim 1 wherein step (a) includes selecting the delivery member to be a guidewire.
Claim 16
Independent Claim
83 words
A method for detecting electrolytic separation of an occlusion device comprising the steps of: (a) delivering an occlusion device, which is coupled to a delivery member via a linking member, to a desired site in a mammal via the delivery member; (b) forming a circuit path including the linking member and occlusion device; (c) supplying DC power with a superposed AC signal to said circuit path; and (d) monitoring the AC impedance of said circuit path to detect a change in said impedance.
Claim 17
Independent Claim
83 words
A method for detecting electrolytic separation of an occlusion device comprising the steps of: (a) delivering an occlusion device, which is coupled to a delivery member via a linking member, to a desired site in a mammal via the delivery member; (b) forming a circuit path including the linking member and occlusion device; (c) supplying DC power with a superposed AC signal to said circuit path; and (d) monitoring the AC impedance of said circuit path to detect a change in said impedance.
Claim 18
Dependent Claim
35 words
The method of claim 15 wherein said monitoring step includes monitoring the AC impedance of said circuit path to detect a change in said impedance indicative of separation between the occlusion device and linking member.
Claim 19
Dependent Claim
68 words
The method of claim 15 wherein the AC signal includes a voltage amplitude and step (d) comprises monitoring the voltage amplitude of the AC signal and further including the steps of averaging the monitored voltage amplitude over time to obtain an average monitored value and interrupting the DC power supply to the linking member when at least about a 20% change from the average monitored value is detected.
Claim 20
Dependent Claim
53 words
The method of claim 15 wherein the AC signal includes a voltage amplitude and said step (d) comprises monitoring the voltage amplitude of the AC signal and further including the step of interrupting the DC power supply to the linking member in response to detecting a predetermined change in the AC signal amplitude.
Claim 21
Independent Claim
76 words
A method for detecting electrolytic separation of an occlusion device comprising the steps of: (a) delivering an occlusion device, which is coupled to a delivery member via a linking member, to a desired site in a mammal via the delivery member; (b) supplying DC power with a superposed AC signal to the linking member; and (c) monitoring the superposed AC signal to detect a change therein indicative of separation between the occlusion device and delivery member.
Claim 22
Independent Claim
76 words
A method for detecting electrolytic separation of an occlusion device comprising the steps of: (a) delivering an occlusion device, which is coupled to a delivery member via a linking member, to a desired site in a mammal via the delivery member; (b) supplying DC power with a superposed AC signal to the linking member; and (c) monitoring the superposed AC signal to detect a change therein indicative of separation between the occlusion device and delivery member.
Claim 23
Dependent Claim
52 words
The method of claim 19 wherein the AC signal includes a voltage amplitude and step (c) comprises monitoring the voltage amplitude of the AC signal and further including the step of interrupting the DC power supply to the linking member in response to detecting a predetermined change in the AC signal amplitude.
Claim 24
Dependent Claim
68 words
The method of claim 19 wherein the AC signal includes a voltage amplitude and step (d) comprises monitoring the voltage amplitude of the AC signal and further including the steps of averaging the monitored voltage amplitude over time to obtain an average monitored value and interrupting the DC power supply to the linking member when at least about a 20% change from the average monitored value is detected.
References Cited (Backward Citations)
US4057063A
Cited
US4416276A
Cited
US4739768A
Cited
US4739768B2
Cited
US4739768B1
Cited
US4884579A
Cited
US4994069A
Cited
US5354295A
Cited
US5122136A
Cited
US5170802A
Cited
US5167658A
Cited
US5190517A
Cited
US5304194A
Cited
US5423810A
Cited
US5300068A
Cited
US5341807A
Cited
US5250071A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-06-30 | 2000-12-30 | 2001-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-06-30 | 2004-12-30 | 2005-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-06-30 | 2008-12-30 | 2009-07-01 | $7700.00 | Window Closed / Lapsed |