Platelet collecting apparatus
First Claim
1. A platelet collecting apparatus comprising:
- a centrifugal separator possessing a rotatable rotor having a blood storing space formed therein and an inlet and an outlet both communicating with said blood storing space and centrifugally separating the blood introduced through said inlet inside said blood storing space by virtue of the rotation of said rotor;
a first line for allowing the flow of the blood entering said centrifugal separator;
a second line for allowing the flow of the blood emanating from said centrifugal separator;
a plasma collecting bag connected to said first line and said second line so as to collect the plasma emanating from said centrifugal separator and return the collected plasma to said centrifugal separator;
a platelet collecting bag connected to said second line so as to collect the platelets emanating from said centrifugal separator;
a blood delivering pump disposed in said first line; and
a controller for controlling the operation of said rotor of said centrifugal separator and the operation of said blood delivering pump, wherein said controller is programmed to increase the rotational frequency of said rotor in conformity with-the increase of the volume of erythrocytes in said centrifugal separator during blood collection.
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Accused Products
Abstract
A platelet collecting apparatus 1 comprises a centrifugal separator 20 possessing a rotatable rotor 142; a first line 21 for allowing the flow of the blood entering the centrifugal separator 20; a second line 22 for allowing the flow of the blood emanating from the centrifugal separator, a plasma collecting bag 25 connected to the first line 21 and the second line 22 so as to collect the plasma emanating from the centrifugal separator 20 and return the collected plasma to the centrifugal separator 20, a platelet collecting bag 26 connected to the second line 22 so as to collect the platelets emanating from the centrifugal separator 20, a blood delivering pump 11 disposed in the first line 21, and a controller 13 for controlling the operation of the rotor of the centrifugal separator 20 and the operation of the blood delivering pump 11. The controller 13 is endowed with a function of varying the rotational frequency of the rotor 142 during the course of blood collection in conformity with the amount of the blood entered into the centrifugal separator 20 via the first line 21.
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Citations
15 Claims
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1. A platelet collecting apparatus comprising:
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a centrifugal separator possessing a rotatable rotor having a blood storing space formed therein and an inlet and an outlet both communicating with said blood storing space and centrifugally separating the blood introduced through said inlet inside said blood storing space by virtue of the rotation of said rotor;
a first line for allowing the flow of the blood entering said centrifugal separator;
a second line for allowing the flow of the blood emanating from said centrifugal separator;
a plasma collecting bag connected to said first line and said second line so as to collect the plasma emanating from said centrifugal separator and return the collected plasma to said centrifugal separator;
a platelet collecting bag connected to said second line so as to collect the platelets emanating from said centrifugal separator;
a blood delivering pump disposed in said first line; and
a controller for controlling the operation of said rotor of said centrifugal separator and the operation of said blood delivering pump, wherein said controller is programmed to increase the rotational frequency of said rotor in conformity with-the increase of the volume of erythrocytes in said centrifugal separator during blood collection. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A platelet collecting apparatus comprising:
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a centrifugal separator possessing a rotatable rotor having a blood storing space formed therein and an inlet and an outlet both communicating with said blood storing space and centrifugally separating the blood introduced through said inlet inside said blood storing space by virtue of the rotation of said rotor;
a first line for allowing the flow of the blood entering said centrifugal separator;
a second line for allowing the flow of the blood emanating from said centrifugal separator;
a plasma collecting bag connected to said first line and said second line so as to collect the plasma emanating from said centrifugal separator and return the collected plasma to said centrifugal separator;
a platelet collecting bag connected to said second line so as to collect the platelets emanating from said centrifugal separator;
a blood delivering pump disposed in said first line; and
a controller for controlling the operation of said rotor of said centrifugal separator and the operation of said blood delivering pump, wherein said controller is programmed to increase the flow rate of circulation by said blood delivering pump to cause the plasma collected in said plasma collecting bag to be circulated with acceleration between said plasma collecting bag and said centrifugal separator; and
to increase the rotational frequency of said rotor in conformity with the increase in the flow rate of circulation produced by said blood delivering pump.
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10. A method for collecting blood platelets by the use of a platelet collecting apparatus comprising;
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a centrifugal separator possessing a rotatable rotor having a blood storing space formed therein and an inlet and an outlet both communicating with said blood storing space and centrifugally separating the blood introduced through said inlet inside said blood storing space by virtue of the rotation of said rotor;
a first line for allowing the flow of the blood entering said centrifugal separator;
a second line for allowing the flow of the blood emanating from said centrifugal separator;
a plasma collecting bag connected to said first line and said second line so as to collect the plasma emanating from said centrifugal separator and return the collected plasma to said centrifugal separator;
a platelet collecting bag connected to said second line so as to collect the platelets emanating from said centrifugal separator;
a blood delivering pump disposed in said first line; and
a controller for controlling the operation of said rotor of said centrifugal separator and the operation of said blood delivering pump, wherein said method comprises blood collection in which the rotational frequency of said rotor sequentially increases to a predetermined rotational frequency in conformity with the amount of blood entered into said centrifugal separator via said first line during the course of blood collection. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification