Patent US3768653A successfully refreshed from Google Patents.
US3768653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filtering cardiotomy reservoir
Assignee: Individual
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Filing: 1972-03-21
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Granted: 1973-10-30
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Expires: 1992-03-21
Abstract
Abstract A surgical blood sucker and peristaltic pump combination discharge a three-phase mixed stream of blood, air and surgical tissue debris into a cardiotomy reservoir through a slot shape blood inlet nozzle tangentially disposed on the wall of the blood reservoir volume. The tissue debris is collected internally in the reservoir on the reservoir base filter face and the face of the conical air filter. The air, under slight pressure in the reservoir, exits from the reservoir through the air filter and a relief valve. The defoamed blood flows from the reservoir through multiple base filter plate exit apertures, into a blood oxygenator.
Inventors
- 👤 R Brumfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:50
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/36; A61M1/3621; A61M1/3627; A61M1/14; A61M1/32; A61M1/322; A61M1/325; A61M2206/00; A61M2206/10; A61M2206/16
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
201 words
A cardiotomy reservoir for recovering patient blood in a surgical procedure, comprising in combination: a uniform tubular case having a base plate and a top plate, providing an enclosed reservoir volume; a blood inlet conduit secured through the reservoir wall adjacent the said top plate, said conduit having a nozzle having an oriented slot discharge aperture providing a flat blood inlet stream flow tangentially on the inner tubular wall of said case; a reservoir base filter coextensive with said base plate, said filter having a porosity suitable for filtering whole blood, said filter retaining surgical tissue debris inside said receptacle on the filter face; a retaining ring means coplanarly securing said reservoir base filter to said base plate; an air filter concentrically coextending in said tubular receptacle from said top plate to said base filter, said air filter having a porosity suitable for filtering air and blocking blood flow; an air exit conduit normally centrally disposed through said top plate, said exit conduit discharging filtered air from said reservoir; a plurality of blood exit apertures conductively disposed through said base plate, providing for the flow of filtered blood from said cardiotomy reservoir; and, all aforesaid components physiologically compatible with patient blood.
Claim 2
Dependent Claim
201 words
A cardiotomy reservoir for recovering patient blood in a surgical procedure, comprising in combination: a uniform tubular case having a base plate and a top plate, providing an enclosed reservoir volume; a blood inlet conduit secured through the reservoir wall adjacent the said top plate, said conduit having a nozzle having an oriented slot discharge aperture providing a flat blood inlet stream flow tangentially on the inner tubular wall of said case; a reservoir base filter coextensive with said base plate, said filter having a porosity suitable for filtering whole blood, said filter retaining surgical tissue debris inside said receptacle on the filter face; a retaining ring means coplanarly securing said reservoir base filter to said base plate; an air filter concentrically coextending in said tubular receptacle from said top plate to said base filter, said air filter having a porosity suitable for filtering air and blocking blood flow; an air exit conduit normally centrally disposed through said top plate, said exit conduit discharging filtered air from said reservoir; a plurality of blood exit apertures conductively disposed through said base plate, providing for the flow of filtered blood from said cardiotomy reservoir; and, all aforesaid components physiologically compatible with patient blood.
Claim 3
Dependent Claim
56 words
The combination of claim 1 wherein the blood inlet conduit comprises: a blood inlet conduit normally secured through said top plate adjacent the top plate perimeter and the receptacle wall, said conduit having a nozzle having an oriented slot discharge aperture providing a flat inlet stream flow tangentially on the inner tubular wall of said receptacle.
Claim 4
Dependent Claim
30 words
The combination of claim 1 wherein the base plate comprises: a plurality of blood flow relieving passage means disposed in the face of base plate adjacent said reservoir base filter.
Claim 5
Dependent Claim
38 words
The combination of claim 1 wherein said reservoir base filter comprises: a porous reticulated polyurethane foam having a porosity passing blood elements ranging up to 100 microns diameter, said foam coated with a film composition collapsing blood-air foam.
Claim 6
Dependent Claim
30 words
The combination of claim 1 wherein said reservoir base filter comprises: a porous silicone foam having a porosity ranging up to 100 micron diameter, said silicone foam collapsing blood-air foam.
Claim 7
Dependent Claim
31 words
The combination of claim 1 wherein said reservoir air outlet conduit has a pressure relief valve secured thereon, said valve relieving at a pressure not exceeding 100 mm Hg above atmospheric.
Claim 8
Dependent Claim
37 words
The combination of Claim 1 wherein said air filter comprises: a truncated cone shape porous filter having a truncated cone apex centrally disposed adjacent said reservoir base filter and a cone base disposed adjacent said top plate.
Claim 9
Dependent Claim
38 words
The combination of claim 7 wherein said truncated cone shape porous filter comprises: a porous reticulated polyurethane foam having a porosity ranging up from 10 pores per lineal inch, said foam coated with an air-blood foam collapsing composition.
Claim 10
Dependent Claim
29 words
The combination of claim 7 wherein said truncated cone shape porous filter comprises: a porous silicone foam structure having a porosity ranging up from 10 pores per lineal inch.
Claim 11
Dependent Claim
189 words
In a cardiotomy reservoir whose internal reservoir volume is enclosed by a reservoir case having a case top and case base, the combination comprising: a blood inlet conduit secured through the reservoir wall adjacent said case top, said conduit having a nozzle having an oriented discharge aperture providing a blood inlet stream flow tangentially on the inner wall of said case; a reservoir base filter coextensive with said case base, said filter having a porosity suitable for filtering whole blood, said filter retaining surgical tissue debris inside said case on the filter face; a means coplanarly securing said reservoir base filter to said case base; an air filter concentrically coextending in said reservoir case from said case top to said base filter, said air filter having a porosity suitable for filtering air and blocking blood flow; an air exit conduit normally centrally disposed through said case top, said exit conduit discharging filtered air from said reservoir volume; a plurality of blood exit apertures conductively disposed through said case base, providing for the flow of filtered blood from said cardiotomy reservoir; and, all aforesaid components physiologically compatible with patient blood.
Claim 12
Dependent Claim
189 words
In a cardiotomy reservoir whose internal reservoir volume is enclosed by a reservoir case having a case top and case base, the combination comprising: a blood inlet conduit secured through the reservoir wall adjacent said case top, said conduit having a nozzle having an oriented discharge aperture providing a blood inlet stream flow tangentially on the inner wall of said case; a reservoir base filter coextensive with said case base, said filter having a porosity suitable for filtering whole blood, said filter retaining surgical tissue debris inside said case on the filter face; a means coplanarly securing said reservoir base filter to said case base; an air filter concentrically coextending in said reservoir case from said case top to said base filter, said air filter having a porosity suitable for filtering air and blocking blood flow; an air exit conduit normally centrally disposed through said case top, said exit conduit discharging filtered air from said reservoir volume; a plurality of blood exit apertures conductively disposed through said case base, providing for the flow of filtered blood from said cardiotomy reservoir; and, all aforesaid components physiologically compatible with patient blood.
Claim 13
Dependent Claim
32 words
The combination of claim 10 wherein the nozzle of the blood inlet conduit has a slot aperture providing a flat oriented blood inlet flow tangentially on the inner wall of said case.
Claim 14
Dependent Claim
56 words
The combination of claim 10 wherein the blood inlet conduit comprises: a blood inlet conduit normally secured through said case top adjacent the case top perimeter and the case wall, said conduit having a nozzle having an oriented slot discharge aperture providing a flat inlet stream flow tangentially on the inner tubular wall of said receptacle.
Claim 15
Dependent Claim
30 words
The combination of claim 10 wherein the case base comprises: a plurality of blood flow relieving passage means disposed in the face of case base adjacent said reservoir base filter.
Claim 16
Dependent Claim
38 words
The combination of claim 10 wherein said reservoir base filter comprises: a porous reticulated polyurethane foam having a porosity passing blood elements ranging up to 100 microns diameter, said foam coated with a film composition collapsing blood-air foam.
Claim 17
Dependent Claim
30 words
The combination of claim 10 wherein said reservoir base filter comprises: a porous silicone foam having a porosity ranging up to 100 micron diameter, said silicone foam collapsing blood-air foam.
Claim 18
Dependent Claim
31 words
The combination of claim 10 wherein said reservoir air outlet conduit has a pressure relief valve secured thereon, said valve relieving at a pressure not exceeding 100 mm Hg above atmospheric.
Claim 19
Dependent Claim
37 words
The combination of claim 10 wherein said air filter comprises: a truncated cone shape porous filter having a truncated cone apex centrally disposed adjacent said reservoir base filter and a cone base disposed adjacent said top plate.
Claim 20
Dependent Claim
38 words
The combination of claim 17 wherein said truncated cone shape porous filter comprises: a porous reticulated polyurethane foam having a porosity ranging up from 10 pores per lineal inch, said foam coated with an air-blood foam collapsing composition.
Claim 21
Dependent Claim
29 words
The combination of claim 17 wherein said truncated cone shape porous filter comprises: a porous silicone foam structure having a porosity ranging up from 10 pores per lIneal inch.
References Cited (Backward Citations)
US2833279A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |