DEVICE FOR CONTROLLING FLOW RATE OF ASPIRATED FLUIDS
First Claim
1. An ophthalmic surgical flow control device for balancing fluid flow into and out of a surgical site, comprising:
- a housing forming a motor chamber adjacent a pump chamber;
the motor chamber having an outlet for communication with a fluid collection device and a source of aspiration, and an inlet for communication with an aspiration line through which fluids from the surgical site are delivered to the motor chamber;
the pump chamber having an outlet for communication with an infusion line for supplying fluid to the surgical site, and an inlet for communication with a source of infusion fluid;
a first motor rotor and a second motor rotor rotatably disposed within the motor chamber, and positioned in an aspiration flow path between the motor chamber inlet and outlet in the motor chamber, wherein the first and second motor rotors are positioned relative to each other such that at least one blade of both motor rotors overlap in a region of the aspiration flow path;
a first pump rotor and a second pump rotor rotatably disposed within the pump chamber, and positioned in an infusion flow path between the pump chamber inlet and the outlet, wherein the first and second pump rotors are positioned relative to each other such that at least one blade of both pump rotors overlap in a region of the infusion path;
a drive shaft having a first end coupled to the first motor rotor and a second end coupled to the first pump rotor; and
wherein fluid flowing between the inlet and outlet of the motor chamber causes the first motor rotor to rotate the drive shaft, whereby the drive shaft drives the first pump rotor at the same rotational speed as the first motor rotor such that any surge in aspiration fluid flow through the motor chamber induces a similar surge in infusion fluid flow to the operative site, to thereby reduce the risk of surge-induced pressure changes in the operative site.
7 Assignments
0 Petitions
Accused Products
Abstract
A flow control device includes a housing having a motor chamber and a pump chamber. The motor chamber has an outlet for communication with a fluid collection device, and an inlet for communication with an aspiration line through which fluids are delivered into the motor chamber. First and second motor rotors are rotatably disposed in a flow path between the inlet and the outlet in the motor chamber, and a drive shaft is coupled to the first motor rotor. The pump chamber has an outlet for infusing fluid to a surgical site, and an inlet through which infusion fluids are delivered into the pump chamber. First and second pump rotors are rotatably disposed in a flow path between the inlet and the outlet in the pump chamber, where the first pump rotor is coupled to the drive shaft. The drive shaft drives the pump rotors at the same speed as the motor rotors, such that any surge in aspiration flow induces a similar surge in infusion flow.
16 Citations
17 Claims
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1. An ophthalmic surgical flow control device for balancing fluid flow into and out of a surgical site, comprising:
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a housing forming a motor chamber adjacent a pump chamber; the motor chamber having an outlet for communication with a fluid collection device and a source of aspiration, and an inlet for communication with an aspiration line through which fluids from the surgical site are delivered to the motor chamber; the pump chamber having an outlet for communication with an infusion line for supplying fluid to the surgical site, and an inlet for communication with a source of infusion fluid; a first motor rotor and a second motor rotor rotatably disposed within the motor chamber, and positioned in an aspiration flow path between the motor chamber inlet and outlet in the motor chamber, wherein the first and second motor rotors are positioned relative to each other such that at least one blade of both motor rotors overlap in a region of the aspiration flow path; a first pump rotor and a second pump rotor rotatably disposed within the pump chamber, and positioned in an infusion flow path between the pump chamber inlet and the outlet, wherein the first and second pump rotors are positioned relative to each other such that at least one blade of both pump rotors overlap in a region of the infusion path; a drive shaft having a first end coupled to the first motor rotor and a second end coupled to the first pump rotor; and wherein fluid flowing between the inlet and outlet of the motor chamber causes the first motor rotor to rotate the drive shaft, whereby the drive shaft drives the first pump rotor at the same rotational speed as the first motor rotor such that any surge in aspiration fluid flow through the motor chamber induces a similar surge in infusion fluid flow to the operative site, to thereby reduce the risk of surge-induced pressure changes in the operative site. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A flow control device for balancing fluid flow into and out of a surgical site, comprising:
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a housing having a motor chamber disposed therein, and a pump chamber disposed therein adjacent to the motor chamber; the motor chamber having an outlet for communication with a fluid collection device, and an inlet in communication with an aspiration line through which fluids from a surgical site are delivered to the motor chamber; the pump chamber having an outlet for communication with an infusion line for supplying fluid to a surgical site, and an inlet through which infusion fluids are delivered to the pump chamber; a first motor rotor and a second motor rotor rotatably disposed within the motor chamber, and positioned in a flow path between the inlet and the outlet in the motor chamber; a first pump rotor and a second pump rotor rotatably disposed within the pump chamber, and positioned in a flow path between the inlet and the outlet in the pump chamber; a first drive shaft having a first end coupled to the first motor rotor and a second end coupled to the first pump rotor; a second drive shaft having a first end coupled to the second motor rotor and a second end coupled to the second pump rotor; and wherein fluid flowing between the inlet and outlet of the motor chamber causes the first and second motor rotors to rotate the first and second drive shafts, whereby each drive shaft drives one of the pump rotors at the same rotational speed as a respectively coupled motor rotor, such that any surge in aspiration fluid flow through the motor chamber induces a similar surge in infusion fluid flow through the pump chamber, to thereby reduce the risk of surge-induced pressure changes in the surgical site. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification