Thermoelectric chiller and automatic syringe
First Claim
1. An automatic syringe drive assembly for supporting an insulated syringe having a barrel with handles and plunger comprising;
- a chassis for supporting components to convert rotary motion to reciprocating motion;
a motor supported by the chassis;
a syringe barrel recess on the chassis located along an axis thereof, the syringe barrel recess for supporting the barrel against side to side and axial movement;
a "T" shaped opening on the chassis proximal of the recess, the "T" shaped opening to receive the handles;
a crank rotated by the motor, the crank having several mounting holes along a radius thereof, each mounting hole adapted to receive a replaceable pin;
a linear guide on the chassis, the linear guide including a pair of parallel spaced apart channels along the axis, each of the channels having a groove;
a pair of adjustable tabs extending into the "T" shaped opening to bear against and hold the handle of the syringe carried in the recess for maintaining the syringe barrel aligned axially relative to the parallel spaced apart channels;
a slider shaped to fit between the pair of parallel spaced apart channels for reciprocating linear motion therewithin, the slider connected to the plunger for moving the plunger with reciprocating linear motion relative to the syringe barrel, anda plurality of connecting rods of various lengths each connecting rod having a proximal end for connection to the crank for rotation about and association with the replaceable pin installed in one of the several mounting holes and a distal end for connection to the slider, each connecting rod capable when so disposed between the crank and the slider of setting the distance of linear motion of the plunger caused by the rotary motion of the crank as transferred to reciprocating motion of the slider.
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Accused Products
Abstract
An automatic syringe drive assembly and disposable heat exchanger cassette are used in combination to provide an improved thermodilution technique and apparatus. The automatic syringe drive assembly includes replaceable connecting rods on a slider crank mechanism which permit easy and accurate adjustment of the syringe injection volume. The drive assembly supports as insulated syringe for use in making the injection. The heat exchanger cassette includes a heat transfer plate and a thermoformed plastic labyrinth adhesively connected and used in combination with a thermoelectric chiller to provide a cold bolus of injectate.
57 Citations
7 Claims
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1. An automatic syringe drive assembly for supporting an insulated syringe having a barrel with handles and plunger comprising;
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a chassis for supporting components to convert rotary motion to reciprocating motion; a motor supported by the chassis; a syringe barrel recess on the chassis located along an axis thereof, the syringe barrel recess for supporting the barrel against side to side and axial movement; a "T" shaped opening on the chassis proximal of the recess, the "T" shaped opening to receive the handles; a crank rotated by the motor, the crank having several mounting holes along a radius thereof, each mounting hole adapted to receive a replaceable pin; a linear guide on the chassis, the linear guide including a pair of parallel spaced apart channels along the axis, each of the channels having a groove; a pair of adjustable tabs extending into the "T" shaped opening to bear against and hold the handle of the syringe carried in the recess for maintaining the syringe barrel aligned axially relative to the parallel spaced apart channels; a slider shaped to fit between the pair of parallel spaced apart channels for reciprocating linear motion therewithin, the slider connected to the plunger for moving the plunger with reciprocating linear motion relative to the syringe barrel, and a plurality of connecting rods of various lengths each connecting rod having a proximal end for connection to the crank for rotation about and association with the replaceable pin installed in one of the several mounting holes and a distal end for connection to the slider, each connecting rod capable when so disposed between the crank and the slider of setting the distance of linear motion of the plunger caused by the rotary motion of the crank as transferred to reciprocating motion of the slider. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification