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Direct Arterial Pressure Monitoring
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Kristin Spring, CVT, VTS (Anest), explains the calibration, use, and care of a direct arterial blood pressure system.
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Kristin Spring
CVT CVPP, VTS(Anes.), VTS(ECC)
Enrolled: 08/2011
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Can you please tell me why a T-Port should not be attached to the catheter? Your directions say not to, but do not give a reason.
Also, Is it ok to attach an additional 3-way stopcock to the catheter instead, and then attach the transducer tubing to that?
Hi Emily- good questions. When we are using a transducer set-up to measure direct blood pressure, we don't typically use a T-port. Adding a T-port could change your readings and decrease accuracy because of the narrow tubing with the 90 degree turn on the arm of the T-port. We also don't put a 3-way SC directly into the catheter. I'm not convinced that it would change your DBP readings, but I would be concerned with the extra weight and bulk that it puts on the arterial catheter. We know art-lines can be a bit fickle and come with increased risk of injury to the patient if inadvertently disconnected. If you have a patient on direct blood pressure monitoring and you need to obtain a sample for an ABG, we use the 3-way stop-cock included in the transducer set-up and obtain the sample using the 3-syringe technique. Hope this helps!