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EP0318993A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Blood filter

Assignee: Terumo Corp
•
Filing: 1988-12-01
•
Granted: —
•
Expires: 2008-12-01
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Abstract

Abstract A blood filter (1) comprising a bubble separating section (2) including a generally cylindrical chamber (10) for allowing bubbles to separate from blood, an air discharging vent (12) at an upper end of the chamber (10), and an inlet conduit (13) horizontally extending from the chamber (10) for introducing blood into the chamber (10); and a blood filter section (3) disposed below the bubble separating section (2), including an outlet (16) at a lower end for discharging blood and a filter member (1 disposed between the inlet (13) and the outlet (16) is characterized in that the axis of the inlet conduit (13) extends substantially parallel to a tangent to the generally circular chamber (10) at the connection between the chamber (10) and the inlet conduit (13), and an inflow portion (15) is disposed between the inlet conduit (13) and the chamber (10) so as to define a flowpath merging the inlet conduit (13) to the chamber (10), whereby the inflow portion (15) directs incoming blood from the inlet conduit (13) so as to flow as a substantial laminar flow to a swirl flow of blood in the chamber (10) and then merge with the swirl flow. The apparatus has high bubble removal capacity in that few bubbles are conveyed to the filter member (1 since newly introduced blood does not disturb the existing swirl flow of blood in the chamber (10).

Inventors

  • 👤 Yoshiro Katsura

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-23 14:56
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/36; A61M1/3621; A61M1/3627; B; B01; B01D; B01D29/00; B01D29/11; B01D29/111; B01D29/13; B01D29/15; B01D29/21; B01D29/88; B01D29/90; B01D29/902; B01D29/908; B01D29/92; B01D29/925; A61M1/3623; A61M2206/00; A61M2206/10; A61M2206/16; A61M5/00; A61M5/36

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 158 words
A blood filter comprising a bubble separating section including a chamber having a generally circular cross section for allowing bubbles to separate from blood, a vent formed at an upper end of the chamber for discharging air, an inlet conduit horizontally extending from the chamber for introducing blood into the chamber, the axis of said inlet conduit extending substantially parallel to a tangent to the generally circular chamber at the connection between the chamber and the inlet conduit, and an inflow portion merging the inlet conduit to the chamber, and a blood filter section disposed below said bubble separating section, including an outlet disposed at a lower end of the filter section for discharging blood and a filter member disposed between the inlet and the outlet, whereby said inflow portion introduces incoming blood from the inlet conduit to flow as a substantial laminar flow to a blood flow in the chamber and then merge with the latter flow.
Claim 2
Dependent Claim 158 words
A blood filter comprising a bubble separating section including a chamber having a generally circular cross section for allowing bubbles to separate from blood, a vent formed at an upper end of the chamber for discharging air, an inlet conduit horizontally extending from the chamber for introducing blood into the chamber, the axis of said inlet conduit extending substantially parallel to a tangent to the generally circular chamber at the connection between the chamber and the inlet conduit, and an inflow portion merging the inlet conduit to the chamber, and a blood filter section disposed below said bubble separating section, including an outlet disposed at a lower end of the filter section for discharging blood and a filter member disposed between the inlet and the outlet, whereby said inflow portion introduces incoming blood from the inlet conduit to flow as a substantial laminar flow to a blood flow in the chamber and then merge with the latter flow.
Claim 3
Dependent Claim 64 words
The blood filter of claim 1 wherein said inflow portion is contiguous to the inlet conduit at a leading end and to the chamber at a trailing end and encloses at least a portion of the generally circular chamber of the bubble separating section, and the distance between the inflow portion and the chamber gradually decreases from the leading end to the trailing end.
Claim 4
Dependent Claim 32 words
The blood filter of claim 1 or 2 wherein said bubble separating section further includes a generally conical lid covering the chamber, the vent being provided at the top of said lid.

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