Self flushing luer activated blood sampling devices

Abstract

A blood sampling device for allowing a fluid pressure measurement and a fluid sample to be taken from a patient, having an inlet port configured to receive blood from the patient, an outlet port configured to be coupled to a monitoring channel having an infusion fluid, a sampling port configured for extraction of blood from the patient, a sampling channel configured to self-flush, after extraction, the blood with the infusion fluid, and an auxiliary channel for self-flushing the sampling channel.

1 . A sampling device, comprising: 
 an inlet port configured to receive a first fluid;    an outlet port configured to be coupled to a monitoring channel having a second fluid;    a sampling port configured for extraction of the first fluid; and    a sampling channel configured to self-flush, after extraction, the first fluid with the second fluid.    
   
   
       2 . The sampling device of  claim 1  further comprising an auxiliary channel for self-flushing the sampling channel.  
   
   
       3 . The sampling device of  claim 2  further comprising a paddle coupled to the sampling channel and rotatable to allow the sampling channel to align with the auxiliary channel for self-flushing.  
   
   
       4 . The sampling device of  claim 2  further comprising a ball valve configured to selectively allow a fluid to flow through the sampling channel or the auxiliary channel.  
   
   
       5 . The sampling device of  claim 2  wherein the sampling port is configured to allow a needle to draw the first fluid while blocking access to the auxiliary channel.  
   
   
       6 . The sampling device of  claim 2  further comprising a slide with an opening that selectively allows the flow of the fluid through the sampling channel or the auxiliary channel.  
   
   
       7 . The sampling device of  claim 2  further comprising a stop cock having a T-shaped passageway that can selectively allow fluid to pass through the sampling channel, the auxiliary channel, or the monitoring channel.  
   
   
       8 . The sampling device of  claim 8  wherein the stop cock is configured to stop the flow of second fluid when the first fluid is being extracted.  
   
   
       9 . The sampling device of  claim 8  wherein the stop cock isolates the sampling port from the outlet port.  
   
   
       10 . The sampling device of  claim 1 , wherein the sampling port is configured to receive a syringe.  
   
   
       11 . The sampling device of  claim 1 , wherein the sampling port is configured to receive a cannula.  
   
   
       12 . An apparatus for allowing a fluid pressure measurement and a fluid sample to be taken from a patient, comprising: 
 an inlet port configured to receive a first fluid from the patient;    an outlet port configured to be coupled to a monitoring channel having a second fluid;    a sampling port configured for extraction of the first fluid from the patient;    a sampling channel configured to receive the first fluid during extraction; and    a self-flushing means for cleaning the sampling channel with the second fluid.    
   
   
       13 . The apparatus of  claim 12 , wherein the sampling port is configured to receive a syringe.  
   
   
       14 . The apparatus of  claim 12 , wherein the sampling port is configured to receive a cannula.  
   
   
       15 . A blood sampling device, comprising: 
 an inlet port configured to receive blood from the patient;    an outlet port configured to be coupled to a monitoring channel having an infusion fluid;    a sampling port configured for extraction of blood from the patient;    a sampling channel configured to self-flush, after extraction, the blood with the infusion fluid; and    an auxiliary channel for self-flushing the sampling channel.    
   
   
       16 . The blood sampling device of  claim 15  further comprising a rotatable paddle coupled to the sampling channel and orients the sampling channel to align with the auxiliary channel for self-flushing.  
   
   
       17 . The blood sampling device of  claim 15  further comprising a ball valve configured to selectively allow the blood or the infusion fluid to flow through the sampling channel or the auxiliary channel.  
   
   
       18 . The blood sampling device of  claim 15  wherein the sampling port is configured to allow a needle to draw the blood while blocking access to the auxiliary channel.  
   
   
       19 . The blood sampling device of  claim 15  further comprising a slide with an opening that selectively allows the flow of blood through the sampling channel or the flow of the infusion fluid through the auxiliary channel.  
   
   
       20 . The blood sampling device of  claim 15  further comprising a stop cock that can selectively allow fluid to pass through at least one of the sampling channel, the auxiliary channel, or the monitoring channel.