US3730185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endarterectomy apparatus
Assignee: Cook Inc
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Filing: 1971-10-29
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Granted: 1973-05-01
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Expires: 1991-10-29
Abstract
Abstract An apparatus and method for removing arteriosclerotic material from an artery. An electric motor is connected by flexible springs or torque shaft to a rotation oscillation converter. A rod having a bendable looped tip or loop at its distal end is removably connected to the oscillatory output of the converter. The loop or tip is inserted into the artery which has been cut to receive the tip. The tip is oscillated between the media layer and advantitia layer stretching the adventitia layer and causing separation of the two layers. The loosened arteriosclerotic core is then removed intact from the artery which is then surgically closed.
Inventors
- 👤 W Cook
- 👤 E Lerwick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:15
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3205; A61B17/3207; A61B17/320758; A61B2017/320733; A61B2017/320741
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
94 words
A method of removing arteriosclerotic material from an artery which comprises the steps of: opening the artery by incision; transecting the medial core of the artery; placing a rod supported loop between the medial core and the adventitial tube; rotatably oscillating the rod about its longitudinal axis to provide pivotal motion to said loop and simultaneously advancing the rod and loop up the artery between the medial core and the adventitial tube to stretch the adventitial tube and separate it from the medial core; and, removing the medial core intact from the adventitial tube.
Claim 2
Independent Claim
94 words
A method of removing arteriosclerotic material from an artery which comprises the steps of: opening the artery by incision; transecting the medial core of the artery; placing a rod supported loop between the medial core and the adventitial tube; rotatably oscillating the rod about its longitudinal axis to provide pivotal motion to said loop and simultaneously advancing the rod and loop up the artery between the medial core and the adventitial tube to stretch the adventitial tube and separate it from the medial core; and, removing the medial core intact from the adventitial tube.
Claim 3
Dependent Claim
42 words
The method of claim 1 additionally comprising the step of: grasping the end of the core with a hemostat as the loop is advanced up the artery and, after said removing of the medial core, debriding the artery with a wire basket.
Claim 4
Dependent Claim
49 words
The method Of claim 1 additionally comprising the steps of limiting the advancing of the loop to approximately four to six inches and then pulling it back and rotating the loop 180* prior to again advancing the loop through the same path and another 4 to 6 inches beyond.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |