US 5,849,186 A · Integrated cardiotomy and venous blood reservoir

Abstract

A blood reservoir for the treatment and collection of blood from two different sources. The blood reservoir has a filter/defoamer core assembly comprised of a support structure disposed within an outer defoamer. A separator with an opening is located in the support structure, dividing the support structure into a first and second portions. A depth filter is located within the first portion of the support structure. The first portion of the support structure with the depth filter forms a cardiotomy blood chamber and the second portion with no depth filter forms a venous blood chamber. This filter/defoamer core assembly is placed within a clear outer shell which forms the reservoir. This outer shell has a cover with a venous blood inlet and plurality of cardiotomy inlets. The cardiotomy inlets are in fluid communication with the cardiotomy blood chamber. The venous blood inlet is in communication with a center tube which extends through the first portion of the support cage, through the opening in the separator and opens into the venous blood chamber. The filter/defoamer core assembly may be assembled and positioned within the reservoir shell without the use of adhesives or bonding agents. This blood reservoir is typically used in a system including components to oxygenate and alter the temperature of the blood.

Claims40

Dependent claims

An integrated cardiotomy and venous blood reservoir and oxygenator system for use in an extracorporeal circuit, comprising:

a blood reservoir comprising:
(a) a generally cylindrical, hollow outer shell having a first end, a second end, and a wall extending from the first end to the second end;
(b) a first blood inlet;
(c) a second blood inlet;
(d) a generally cylindrical, hollow shaped outer blood defoamer disposed within the outer shell and spaced apart from the wall of the outer shell, wherein the outer blood defoamer is in fluid communication with the first and second blood inlets;
(e) a blood outlet in fluid communication with the outer blood defoamer;
(f) a unitary, generally cylindrical, hollow support structure having a first end, a second end, a generally cylindrical wall extending without interruption from the first to the second end, and an aperture within the wall, wherein the axial length of the support structure is comprised of a first portion and a second portion, wherein the first portion extends from the first end of the support structure along a portion of the axial length and the second portion extends the remaining portion of the axial length to the second end, and wherein the support structure is disposed within the outer defoamer;
(g) a separator disposed within the support structure and located between the first and second portions of the support structure, wherein the first blood inlet is in fluid communication with the separator and second portion of the support structure;
and
(h) a generally cylindrical, hollow depth filter disposed within the first portion of the support structure, wherein the second blood inlet is in fluid communication with the depth filter, and wherein the depth filter is in fluid communication with the outer defoamer;
and
a blood oxygenator which receives blood from the blood outlet of the blood reservoir.

9 more elements

An integrated cardiotomy and venous blood reservoir, comprising:

a hollow outer shell having a first end, a second end, and a wall extending from the first end to the second end;
a first blood inlet;
a second blood inlet;
a hollow shaped outer blood defoamer disposed within the outer shell and spaced apart from the wall of the outer shell, wherein the outer blood defoamer is in fluid communication with the first and second blood inlets;
a blood outlet in fluid communication with the outer blood defoamer;
a unitary, hollow support structure having a first end, a second end, a wall extending without interruption from the first to the second end, and an aperture within the wall, wherein the axial length of the support structure is comprised of a first portion and a second portion, wherein the first portion extends from the first end of the support structure along a portion of the axial length and the second portion extends the remaining portion of the axial length to the second end, and wherein the support structure is disposed within the outer defoamer;
a separator disposed within the support structure and located between the first and second portions of the support structure, wherein the first blood inlet is in fluid communication with the separator and second portion of the support structure;
and
a depth filter disposed within the first portion of the support structure, wherein the second blood inlet is in fluid communication with the depth filter, and wherein the depth filter is in fluid communication with the outer defoamer.

6 more elements

An integrated cardiotomy and venous blood reservoir, comprising:

a hollow outer shell having a first end, a second end, and a wall extending from the first end to the second end;
a first blood inlet;
a second blood inlet;
a hollow shaped outer blood defoamer disposed within the outer shell and spaced apart from the wall of the outer shell, wherein the outer blood defoamer is in fluid communication with the first and second blood inlets;
a blood outlet in fluid communication with the outer blood defoamer;
a unitary, hollow support structure having a first end, a second end, a wall extending without interruption from the first to the second end, and an aperture within the wall, wherein the axial length of the support structure is comprised of a first portion and a second portion, wherein the first portion extends from the first end of the support structure along a portion of the axial length and the second portion extends the remaining portion of the axial length to the second end, and wherein the support structure is disposed within the outer defoamer;
a separator disposed within the support structure and located between the first and second portions of the support structure, wherein the first blood inlet is in fluid communication with the separator and second portion of the support structure;
a depth filter disposed within the first portion of the support structure, wherein the second blood inlet is in fluid communication with the depth filter, and wherein the depth filter is in fluid communication with the outer defoamer;
and
a dividing ledge located on the inside surface of the support structure between the first and second portions of the support structure, wherein the separator rests on the dividing ledge thereby substantially preventing blood from the second inlet mixing with blood from the first inlet before the blood from the second inlet passes through the depth filter, wherein the separator further includes a first flange at one end and a second flange at the other end, wherein the dividing ledge further includes a plurality of bendable tabs, wherein the first flange rests on the dividing ledge and the bendable tabs are positioned between the first and second flanges to firmly maintain the separator in position between the first and second portions of the support structure.

7 more elements

An integrated cardiotomy and venous blood reservoir, comprising:

a hollow outer shell having a first end, a second end, and a wall extending from the first end to the second end;
a first blood inlet;
a second blood inlet;
a hollow shaped outer blood defoamer disposed within the outer shell and spaced apart from the wall of the outer shell, wherein the outer blood defoamer is in fluid communication with the first and second blood inlets;
a blood outlet in fluid communication with the outer blood defoamer;
a hollow support structure having a first end, a second end, a wall extending therebetween, and an aperture within the wall, wherein the axial length of the support structure is comprised of a first portion and a second portion, wherein the first portion extends from the first end of the support structure along a portion of the axial length and the second portion extends the remaining portion of the axial length to the second end, and wherein the support structure is disposed within the outer defoamer;
a separator disposed completely within the support structure and located between the first and second portions of the support structure, wherein the second portion is at least one-tenth the length of the first portion, wherein the first blood inlet is in fluid communication with the separator and second portion of the support structure;
and
a depth filter disposed within the first portion of the support structure, wherein the second blood inlet is in fluid communication with the depth filter, and wherein the depth filter is in fluid communication with the outer defoamer.

6 more elements

A method of assembling an integrated cardiotomy and venous blood reservoir, comprising the steps of:

providing a generally cylindrical, hollow support structure having a first end, a second end, and a wall therebetween with apertures, wherein the length of the support structure is comprised of a first portion extending from the first end and a portion of the axial length and a second portion extending the remaining portion of the axial length to the second end;
inserting the support structure within a generally cylindrical, hollow outer defoamer;
inserting a generally cylindrical, hollow depth filter within the first portion of the support structure;
inserting a separator within the depth filter located in the first portion of the support structure so the separator is located between the first and second portions of the support structure;
providing a generally cylindrical, hollow outer shell having a first end, a second end, a generally cylindrical wall therebetween, first blood inlet, second blood inlet, and blood outlet;
placing the support structure, including outer defoamer, filter, and separator, within the outer shell.

3 more elements

Dependencies are inferred from the claim text.

Integrated cardiotomy and venous blood reservoir

Life of this patent

Integrated cardiotomy and venous blood reservoir

Life of this patent

Abstract

Claims40