Method and apparatus for sampling blood and for monitoring blood pressure
First Claim
1. A blood sampling system comprising:
- a catheter for insertion into a patient'"'"'s blood vessel,a source of saline solution,tubing connecting said source to said catheter,a stopcock in series with said tubing,a saline solution collection bag connected to said stopcock,said stopcock selectively connecting said catheter to said source or said catheter to said collection bag, anda sampling site in said tubing between said catheter and said stopcock.
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Accused Products
Abstract
A source of saline solution under pressure is connected through tubing to a catheter inserted in a patient'"'"'s blood vessel. A waste collection bag is connected to the tubing through a stopcock which permits the selective connecting of the catheter to the waste collection bag or the bag of saline solution. The sampling site is in the tubing between the catheter and the stopcock. Normally, saline solution flows into the patient'"'"'s blood vessel. When a sample is to be taken, the stopcock is shifted so that the pressure of the patient'"'"'s blood forces blood into the tubing, driving saline into the waste collection bag. When blood has reached the sampling site, blood is extracted with a hypodermic syringe.
103 Citations
5 Claims
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1. A blood sampling system comprising:
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a catheter for insertion into a patient'"'"'s blood vessel, a source of saline solution, tubing connecting said source to said catheter, a stopcock in series with said tubing, a saline solution collection bag connected to said stopcock, said stopcock selectively connecting said catheter to said source or said catheter to said collection bag, and a sampling site in said tubing between said catheter and said stopcock. - View Dependent Claims (2, 3, 4, 5)
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Specification