Multiple syringe pump
First Claim
1. A multiple syringe pump, comprising a pump housing, first seating means of a first size to receive a first syringe therein, second seating means of a second different size to receive a second syringe therein, first drive means connectible to said first syringe to empty its contents at a first independently controlled rate of flow, second drive means connectible to said second syringe to empty its contents at a second independently controlled rate of flow, and control means to independently control said first and second drive means and the flow rate at which each respectively empties the syringe to which is is connected, whereby the said rate of flow from said first syringe may be different than the said rate of flow from said second syringe, said first drive means including a first motor, said second drive means including a second motor, said first motor being operable at one rate of speed, said second motor is operable at a different rate of speed, said first and second motors being operable at the same time to move said drive means in the direction to empty said syringes, and either of said first and second motors being additionally operable while the other is not operating.
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Accused Products
Abstract
A multiple syringe pump, comprising a pump housing, two or more seating recesses therein to receive two or more syringes for delivering two or more different substances to a patient intravenously, such as nutritional elements in one and medication substances in another, and a corresponding plurality of drive mechanisms in said pump housing powered by an electrical source for connection to each of the two or more syringes seated in said pump housing to move the syringe plungers at a controlled rate in the direction to discharge the contents of the syringe cylinder. The discharge ports of the syringes are connected to respective discharge tubes which in turn lead to a Y-connector which has its common outlet port connected to a single tube leading to a patient for intravenous infusion of the respective substances. The seating recesses of the pump housing are of different sizes to accept different sized syringes. The drive mechanisms are operable and controllable separately, for operation at different rates of speed and to independently control rates of discharge of the contents of each of the syringes.
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Citations
16 Claims
- 1. A multiple syringe pump, comprising a pump housing, first seating means of a first size to receive a first syringe therein, second seating means of a second different size to receive a second syringe therein, first drive means connectible to said first syringe to empty its contents at a first independently controlled rate of flow, second drive means connectible to said second syringe to empty its contents at a second independently controlled rate of flow, and control means to independently control said first and second drive means and the flow rate at which each respectively empties the syringe to which is is connected, whereby the said rate of flow from said first syringe may be different than the said rate of flow from said second syringe, said first drive means including a first motor, said second drive means including a second motor, said first motor being operable at one rate of speed, said second motor is operable at a different rate of speed, said first and second motors being operable at the same time to move said drive means in the direction to empty said syringes, and either of said first and second motors being additionally operable while the other is not operating.
- 13. A multiple syringe pump, comprising a pump housing, first seating means to receive a first syringe therein, second seating means to receive a second syringe therein, first drive means connectible to said first syringe to empty its contents at a first independently controlled rate of flow, second drive means connectible to said second syringe to empty its contents at a second independently controlled rate of flow, and control means to independently control said first and second drive means and the flow rate at which each respectively empties the syringe to which it is connected, including said first and second syringes, said first syringe including a relatively large diameter cylindrical container of relatively long dimension, a piston of corresponding diameter slidably mounted therein for reciprocal movement between a fully inserted position at which point the syringe container is emptied and a fully retracted position at which point the syringe container is filled, a relatively long plunger rod connected to said piston of said first syringe extending outwardly from said cylindrical container thereof, said plunger rod of said first syringe being connectible to said first drive means, said first drive means being operable to drive said plunger rod in a direction to move said piston from said fully retracted position to said fully inserted position, said second syringe including a relatively small diameter container of relatively short dimension, a piston of corresponding diameter slidably mounted therein for reciprocal movement between a fully inserted position at which the syringe container is emptied and a fully retracted position at which point the syringe container is filled, a relatively short plunger rod connected to said piston of said second syringe extending outwardly from said cylindrical container thereof, said plunger rod of said second syringe being connectible to said second drive means, said second drive means being operable to drive said plunger rod in a direction to move said piston from said fully retracted position to said fully inserted position, including a multiple syringe tube connecting member having first and second inlet ports and an outlet port, a first length of flexible tubing connected between said first syringe and said first inlet port of said connecting member, a second length of flexible tubing connected between said second syringe and said second inlet port of said connecting member, and a third length of flexible tubing connected at one end to said outlet port of said connecting member and at the opposite end to means for inserting into the vein of a patient to be fed intravenously, including a third seating means in said syringe pump housing to receive a third syringe, including said third syringe, said third syringe including a cylindrical container of a diameter smaller than that of said cylindrical container of said first syringe and having a length shorter than that of said container of said first syringe, a piston of corresponding diameter slidably mounted in said cylindrical container of said third syringe for reciprocal movement therein between a fully inserted position at which point said container is emptied and a fully retracted position at which point said container is filled, a plunger rod connected to said piston of said third syringe extending outwardly from said cylindrical container thereof, including third drive means connectible to said third syringe to empty its contents at a third independently controlled rate of flow, said control means including means to independently control said third drive means and the flow rate at which said third drive means empties said third syringe, said plunger rod of said third syringe being connectible to said third drive means, wherein said first syringe includes a first outlet connector having a primary inlet port connected to the discharge end of said first syringe, an outlet port of said first outlet connector connected to said first length of flexible tubing, and an auxiliary inlet port of said first outlet connector, a gravity bag for positioning above said first syringe for backfilling thereof, a fourth length of flexible tubing connected between said gravity bag and said auxiliary inlet port of said first outlet connector of said first syringe.
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15. A multiple syringe pump, comprising a pump housing, first seating means to receive a first syringe therein, second seating means to receive a second syringe therein, first drive means connectible to said first syringe to empty its contents at a first independently controlled rate of flow, second drive means connectible to said second syringe to empty its contents at a second independently controlled rate of flow, and control means to independently control said first and second drive means and the flow rate at which each respectively empties the syringe to which it is connected, including said first and second syringes, said first syringe including a relatively large diameter cylindrical container of relatively long dimension, a piston of corresponding diameter slidably mounted therein for reciprocal movement between a fully inserted position at which point the syringe container is emptied and a fully retracted position at which point the syringe container is filled, a relatively long plunger rod connected to said piston of said first syringe extending outwardly from said cylindrical container thereof, said plunger rod of said first syringe being connectible to said first drive means, said first drive means being operable to drive said plunger rod in a direction to move said piston from said fully retracted position to said fully inserted position, said second syringe including a relatively small diameter container of relatively short dimension, a piston of corresponding diameter slidably mounted therein for reciprocal movement between a fully inserted position at which the syringe container is emptied and a fully retracted position at which point the syringe container is filled, a relatively short plunger rod connected to said piston of said second syringe extending outwardly from said cylindrical container thereof, said plunger rod of said second syringe being connectible to said second drive means, said second drive means being operable to drive said plunger rod in a direction to move said piston from said fully retracted position to said fully inserted position, including a multiple syringe tube connecting member having first and second inlet ports and an outlet port, a first length of flexible tubing connected between said first syringe and said first inlet port of said connecting member, a second length of flexible tubing connected between said second syringe and said second inlet port of said connecting member, and a third length of flexible tubing connected at one end to said outlet port of said connecting member and at the opposite end to means for inserting into the vein of a patient to be fed intravenously, wherein said first drive means
includes a first electrical power source, a first motor circuit powered by said first electrical power source, including a first electric motor connected in said first motor circuit, a first linear drive mechanism connectible to said first electric motor to drive said plunger rod of said first syringe in a linear direction from the fully retracted position of its piston to the fully inserted position thereof, said second drive means includes a second electrical power source, a second motor circuit powered by said second electrical power source, including a second electric motor connected in said second motor circuit, a second linear drive mechanism connectible to said second electric motor to drive said plunger rod of said second syringe in a linear direction from the fully retracted position of its piston to the fully inserted position thereof, including first alarm means to indicate when at least one of said respective syringes are near the empty mark but at a preselected mark before empty, comprising a first linear drive member included in said first linear drive mechanism operable for movement in a linear direction from the fully retracted position of the piston of said first syringe to a preselected position of such piston before it reaches the empty position thereof, a first alarm circuit connected in parallel with said first motor circuit, a first audible alarm in said first alarm circuit, a normally open first before-empty limit switch in said first alarm circuit, said first before-empty limit switch being positioned for engagement by said first linear drive member when it reaches said position corresponding to said preselected position of said piston of said first syringe before it reaches the empty position thereof whereupon said first before-empty limit switch is moved to the closed position to complete said first alarm circuit and energize said first audible alarm.
Specification