Diastolic Blood Pressure Measured via Direct Arterial Catheterization (Continuous Suction)

What This Test Measures

A catheter is placed in an artery (typically the radial or femoral artery) to directly measure blood pressure. The diastolic pressure is recorded as the pressure in the artery when the heart muscle is relaxed between beats. This continuous monitoring helps track blood flow and pressure changes in real time.

Why It’s Done

Doctors may order this test during surgeries requiring precise blood pressure control (e.g., cardiac procedures), in intensive care units for critically ill patients, or during procedures like angiography. It ensures safe blood pressure levels during interventions.

How It’s Performed

You’ll receive anesthesia or sedation. A catheter is inserted into an artery under sterile conditions, connected to a monitoring device. Blood pressure readings are displayed continuously, with the diastolic value recorded as the lower pressure phase.

What to Expect After

After the procedure, you’ll be monitored closely for any signs of bleeding, infection, or complications at the catheter site. Follow-up care depends on your medical needs, such as dressing changes or observation in a recovery area.