Method and apparatus for taking samples from or administering medication to a patient
First Claim
1. A method of taking a plurality of blood samples from a blood vessel of a patient, using a like plurality of syringes therefor, said method comprising:
- (a) connecting a manifold to said blood vessel;
(b) pumping at a slow rate anticoagulant through said manifold into said blood vessel;
(c) interrupting pumping step (b) and then drawing from said patient into said manifold at a rapid rate blood for said sampling;
(d) actuating a separate one of said plurality of syringes to remove from said manifold a sampling of blood;
(e) discontinuing the actuation of each such syringe prior to the complete filling thereof with blood;
(f) then flushing said manifold of blood by pumping therein at a rapid rate anticoagulant;
(g) then reactuating the partially filled syringe to draw from said manifold anticoagulant; and
(h) then returning to step (b) to operate another syringe to take another blood sample.
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Abstract
A controlled apparatus for withdrawing fluids from a patient or for administering medication to a patient, or both, which controlled apparatus may be remotely and/or automatically controlled. The apparatus includes a manifold and cannula for connecting the manifold to a patient, one or more syringes connected to the manifold, a pump for pumping liquid into and out of the manifold and a controller for controlling the operation of the syringes and the pump. A method of using the apparatus is also provided.
The controlled apparatus is especially useful for the programmed withdrawal of blood from a blood vessel of a patient.
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Citations
20 Claims
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1. A method of taking a plurality of blood samples from a blood vessel of a patient, using a like plurality of syringes therefor, said method comprising:
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(a) connecting a manifold to said blood vessel; (b) pumping at a slow rate anticoagulant through said manifold into said blood vessel; (c) interrupting pumping step (b) and then drawing from said patient into said manifold at a rapid rate blood for said sampling; (d) actuating a separate one of said plurality of syringes to remove from said manifold a sampling of blood; (e) discontinuing the actuation of each such syringe prior to the complete filling thereof with blood; (f) then flushing said manifold of blood by pumping therein at a rapid rate anticoagulant; (g) then reactuating the partially filled syringe to draw from said manifold anticoagulant; and (h) then returning to step (b) to operate another syringe to take another blood sample. - View Dependent Claims (2, 3, 4)
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- 5. Apparatus for taking a blood sample comprising a manifold, means for connecting said manifold to a blood vessel of a patient, a syringe connected to said manifold for drawing a blood sample therefrom and fluid flow means operatively connected to the manifold for drawing blood into the manifold before sampling and for flushing said manifold afterwards with anticoagulant liquid, wherein said fluid flow means includes a reservoir for anticoagulant liquid and a reversible pump therefor, said apparatus further comprising control means for controlling the reversible pump and syringe so that before sampling blood with the syringe the reversible pump slowly pumps anticoagulant liquid into the patient, during sampling with the syringe the reversible pump rapidly pumps blood into the manifold, and after sampling blood with the syringe the reversible pump flushes the manifold rapidly with anticoagulant liquid.
- 9. Apparatus for taking a blood sample comprising a manifold which is adapted to receive a blood sampling syringe, means for connecting said manifold to a blood vessel of a patient, and fluid flow means operatively connected to the manifold for drawing blood into the manifold before sampling and for flushing said manifold afterwards with anticoagulant liquid, wherein said fluid flow means includes a reservoir for anticoagulant liquid and a reversible pump therefor, said apparatus further comprising control means for controlling the reversible pump and the syringe when a syringe is connected to the manifold so that before sampling blood with the syringe the reversible pump slowly pumps anticoagulant liquid into the patient, during sampling with the syringe the reversible pump rapidly pumps blood into the manifold, and after sampling blood with the syringe the reversible pump flushes the manifold rapidly with anticoagulant liquid.
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13. A method of taking a blood sample comprising:
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(a) connecting a manifold to a blood vessel of a patient; (b) drawing blood from the patient into the manifold for sampling; (c) drawing a blood sample from said manifold with a syringe; and (d) flushing said manifold with anticoagulant after taking said blood sample; wherein, before blood sampling steps (b) and (c), anticoagulant liquid is pumped slowly into the patient;
during step (b), the blood is drawn rapidly from the patient'"'"'s blood vessel into the manifold; and
wherein flushing is carried out immediately after blood sampling steps (b) and (c) by pumping at a rapid rate anticoagulant into the manifold to displace the blood therein, and after said flushing anticoagulant liquid is again pumped slowly into the patient. - View Dependent Claims (14)
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15. Apparatus for taking blood samples from an ambulatory patient, said apparatus including housing means adapted to be carried on the patient, and further including:
- a manifold for connection with the patient, a plurality of syringes for successively drawing blood from said manifold, and fluid flow means for drawing blood into the manifold before sampling and for flushing it afterwards with anticoagulant liquid, wherein the fluid flow means includes a reservoir for anticoagulant liquid, a reversible pump therefor and control means for controlling the pump and syringes, so that the pump
(a) between samples pumps anticoagulant liquid into the patients blood vessel, (b) pumps blood into the manifold for each successive sampling of blood, and (c) after each said sampling flushes the manifold with said anticoagulant liquid, wherein the control means further activates in sequence said syringes to collect samples from the manifold when blood is present therein, and wherein the manifold, syringes and fluid flow means are housed in said housing means. - View Dependent Claims (16, 17, 18, 19, 20)
- a manifold for connection with the patient, a plurality of syringes for successively drawing blood from said manifold, and fluid flow means for drawing blood into the manifold before sampling and for flushing it afterwards with anticoagulant liquid, wherein the fluid flow means includes a reservoir for anticoagulant liquid, a reversible pump therefor and control means for controlling the pump and syringes, so that the pump
Specification