Hemodialysis meter
First Claim
1. A conductivity meter comprising in combination:
- a syringe body having a needle attached thereto;
a syringe plunger coacting with the syringe body to draw a fluid into said body when slid in one direction in said body;
a plurality of electrodes attached to said syringe body positioned for contact with a fluid in the syringe body;
a source of electrical power located on said syringe body and being operatively connected to at least one of said electrodes; and
signal output means for generating a visual output responsive to the conductivity of an electrolyte solution covering said electrodes when said source of electrical power is applied across the electrodes, whereby a self-contained syringe can test a liquid by drawing a portion of fluid into the syringe.
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Accused Products
Abstract
A hemodialysis conductivity meter apparatus is provided for measuring dialysate concentration using a self contained syringe. The meter includes a syringe body having a needle attached thereto with a syringe plunger coacting with the body to draw fluid into the body. A pair of electrodes are positioned for contact with the fluid in the syringe body while a power source located on the syringe generates an electric current reading across the electrodes responsive to the fluid in the syringe body. An output meter attached to the syringe gives an immediate reading of the conductivity of the fluid. The plunger of the syringe may be used to keep the electrodes clean and an alternate embodiment allows the syringe plunger to switch the meter on when drawing fluid thereinto and to switch the meter off when removing the plunger or pushing the liquid out of the syringe body.
45 Citations
13 Claims
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1. A conductivity meter comprising in combination:
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a syringe body having a needle attached thereto; a syringe plunger coacting with the syringe body to draw a fluid into said body when slid in one direction in said body; a plurality of electrodes attached to said syringe body positioned for contact with a fluid in the syringe body; a source of electrical power located on said syringe body and being operatively connected to at least one of said electrodes; and signal output means for generating a visual output responsive to the conductivity of an electrolyte solution covering said electrodes when said source of electrical power is applied across the electrodes, whereby a self-contained syringe can test a liquid by drawing a portion of fluid into the syringe. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A syringe meter for testing fluids drawn into the syringe comprising in combination:
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a syringe body having a needle attached thereto; a syringe plunger having a piston on the end thereof coacting with said syringe body to draw a fluid into said body when slid in one direction in said body; a pair of electrodes attached to said syringe body inside said syringe body for contact with a fluid drawn thereinto; a visual meter attached to said syringe body and operatively coupled to said electrodes for producing a visual output from the signal generated by said electrodes; and a power source attached to said body and operatively coupled to said visual meter and electrodes for operation of said meter attached to the syringe body, whereby the syringe can be used to take measurements from the electrodes incorporated in the syringe. - View Dependent Claims (11, 12, 13)
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Specification