US4164468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blood treating device and method of operation
Assignee: Baxter International Inc
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Filing: 1977-01-24
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Granted: 1979-08-14
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Expires: 1997-01-24
Abstract
Abstract A device and method of operation for receiving retrieved blood from the surgical field of a patient and treating the blood so that it is in condition for direct or indirect return to the patient. The device is comprised of a housing adapted to receive a relatively large volume of blood, which when received is removed of air bubbles and other foreign matter. The received blood flows smoothly both to and from a fibrous membrane interposed in the path of blood flow thereby avoiding bubbling and damage to the blood. Significantly, means within the housing are provided to inhibit clotting of the blood within the housing.
Inventors
- 👤 Donald A. Raible
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:14
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/36; A61M1/3621; A61M1/3627; A61M2205/00; A61M2205/33; A61M2205/3379; A61M2205/3386
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
158 words
A device for receiving and treating blood comprising: a hollow blood receiving housing having upper and lower portions; a blood inlet means at said housing lower portion for directing blood into said housing; a blood outlet means at said housing lower portion for directing blood out of said housing; a predetermined blood flow path between said blood inlet and said blood outlet, including a hollow column extending from said blood inlet into said housing upper portion for directing upward blood flow, said column having a discharge into said upper portion of said housing thereby preventing foaming; a defoamer means positioned within said housing and interposed across said flow path and removed from said hollow column discharge for removing gases and other foreign matter from the blood; and a deflection means positioned about and sealed against the exterior of said hollow column, said deflection means being between said hollow column and said defoamer means for providing uniform blood distribution.
Claim 2
Independent Claim
158 words
A device for receiving and treating blood comprising: a hollow blood receiving housing having upper and lower portions; a blood inlet means at said housing lower portion for directing blood into said housing; a blood outlet means at said housing lower portion for directing blood out of said housing; a predetermined blood flow path between said blood inlet and said blood outlet, including a hollow column extending from said blood inlet into said housing upper portion for directing upward blood flow, said column having a discharge into said upper portion of said housing thereby preventing foaming; a defoamer means positioned within said housing and interposed across said flow path and removed from said hollow column discharge for removing gases and other foreign matter from the blood; and a deflection means positioned about and sealed against the exterior of said hollow column, said deflection means being between said hollow column and said defoamer means for providing uniform blood distribution.
Claim 3
Dependent Claim
20 words
The device claimed in claim 1 wherein said deflection plate is further defined as being of a truncated conical shape.
Claim 4
Independent Claim
107 words
A method for treating gas containing blood comprising: receiving blood into a blood receiving and treating housing lower portion; passing said blood along a predetermined blood flow path including passing said blood upwardly through an extended hollow column and discharging said blood from said hollow column into an upper portion of said receiving and treating housing; removing gases and other foreign matter from the blood with a defoamer means spaced apart from said hollow column; deflecting blood and uniformly distributing blood with a distribution plate positioned about the exterior of said hollow column; and removing said treated blood from said blood receiving and treating housing lower portion.
Claim 5
Independent Claim
107 words
A method for treating gas containing blood comprising: receiving blood into a blood receiving and treating housing lower portion; passing said blood along a predetermined blood flow path including passing said blood upwardly through an extended hollow column and discharging said blood from said hollow column into an upper portion of said receiving and treating housing; removing gases and other foreign matter from the blood with a defoamer means spaced apart from said hollow column; deflecting blood and uniformly distributing blood with a distribution plate positioned about the exterior of said hollow column; and removing said treated blood from said blood receiving and treating housing lower portion.
Claim 6
Dependent Claim
14 words
The method claimed in claim 3 further comprising venting said gases from said housing.
References Cited (Backward Citations)
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US1197634A
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US3154485A
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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) | 1982-08-13 | 1983-02-12 | 1983-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-08-13 | 1987-02-12 | 1987-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-08-13 | 1991-02-12 | 1991-08-14 | $7700.00 | Window Closed / Lapsed |