Extracorporeal circulation apparatus for selective cooling method
First Claim
1. An extracorporeal circulation apparatus for selectively cooling a body part of a mammal, said apparatus comprising:
- a diluent supply unit for cooling a diluent and metering the cooled diluent into a blood vessel of a body part of a mammal such that blood of the body part of the mammal becomes diluted and the body part of the mammal becomes cooled, wherein said diluent supply unit includes (i) a fluid supply pump to discharge the diluent into the blood vessel of the mammal, (ii) a heat exchanger to cool the diluent before the diluent is discharged into the blood vessel of the mammal, (iii) a container to supply the diluent to said fluid supply pump, (iv) a catheter to supply the diluent, after the diluent has been discharged from said fluid supply pump and after the diluent has been cooled by said heat exchanger, into the blood vessel of the body part of the mammal, (v) a flow meter to determine the flow rate of the diluent discharged from said fluid supply pump, (vi) a thermometer to determine the temperature of the diluent after the diluent has been cooled by said heat exchanger and before the diluent is supplied into the blood vessel of the body part of the mammal, and (vii) a drip chamber to remove air bubbles from the diluent before the diluent is supplied into the blood vessel of the body part of the mammal;
a blood concentration unit for metering the diluted blood from a blood vessel of the mammal and for concentrating the metered diluted blood to form concentrated blood; and
a blood supply unit for heating the concentrated blood and metering the heated concentrated blood into a blood vessel of the mammal.
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Abstract
An extracorporeal circulation apparatus capable of maintaining hypothermia for a prolonged period when used in the selective cooling method.
The extracorporeal circulation apparatus used in the selective cooling method includes (1) a diluent supply unit for cooling a diluent and metering the diluent into a blood vessel; (2) a blood concentration unit for metering a diluted blood out from a blood vessel and concentrating the diluted blood thus drawn out by filtering the diluted blood; and (3) a blood supply unit for heating the concentrated blood and metering the concentrated blood into a blood vessel, wherein a flow rate of the injected diluent flow rate, Vd and a flow rate of a filtrate, Vb are so controlled that a relationship 0.1 Vd≦Vb≦Vd is maintained.
82 Citations
31 Claims
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1. An extracorporeal circulation apparatus for selectively cooling a body part of a mammal, said apparatus comprising:
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a diluent supply unit for cooling a diluent and metering the cooled diluent into a blood vessel of a body part of a mammal such that blood of the body part of the mammal becomes diluted and the body part of the mammal becomes cooled, wherein said diluent supply unit includes (i) a fluid supply pump to discharge the diluent into the blood vessel of the mammal, (ii) a heat exchanger to cool the diluent before the diluent is discharged into the blood vessel of the mammal, (iii) a container to supply the diluent to said fluid supply pump, (iv) a catheter to supply the diluent, after the diluent has been discharged from said fluid supply pump and after the diluent has been cooled by said heat exchanger, into the blood vessel of the body part of the mammal, (v) a flow meter to determine the flow rate of the diluent discharged from said fluid supply pump, (vi) a thermometer to determine the temperature of the diluent after the diluent has been cooled by said heat exchanger and before the diluent is supplied into the blood vessel of the body part of the mammal, and (vii) a drip chamber to remove air bubbles from the diluent before the diluent is supplied into the blood vessel of the body part of the mammal;
a blood concentration unit for metering the diluted blood from a blood vessel of the mammal and for concentrating the metered diluted blood to form concentrated blood; and
a blood supply unit for heating the concentrated blood and metering the heated concentrated blood into a blood vessel of the mammal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An extracorporeal circulation apparatus for selectively cooling a body part of a mammal, said apparatus comprising:
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a diluent supply unit for cooling a diluent and metering the cooled diluent into a blood vessel of a body part of a mammal such that blood of the body part of the mammal becomes diluted and the body part of the mammal becomes cooled;
a blood concentration unit for metering the diluted blood from a blood vessel of the mammal and for concentrating the metered diluted blood to form concentrated blood, wherein said blood concentration unit includes (i) a drawing-out/fluid supply pump for metering the diluted blood from the mammal, (ii) a blood concentration device to concentrate the diluted blood, (iii) a catheter to supply the metered diluted blood from a blood vessel of the mammal to said drawing-out/fluid supply pump, (iv) an anticoagulant supply unit to supply an anticoagulant to the diluted blood after the diluted blood has been metered from a blood vessel of the mammal, and (v) a drip chamber to remove air bubbles from the diluted blood after the diluted blood has been metered from a blood vessel of the mammal but before the diluted blood is supplied to said blood concentration device; and
a blood supply unit for heating the concentrated blood and metering the heated concentrated blood into a blood vessel of the mammal. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification