From where should a respiratory therapist measure central venous pressure (CVP) when using a Swan-Ganz catheter?

Measuring central venous pressure (CVP) using a Swan-Ganz catheter is typically performed through the proximal lumen of the catheter. The Swan-Ganz catheter, also known as a pulmonary artery catheter, is designed with multiple lumens that allow various measurements and infusions.

When measuring CVP, which reflects the pressure in the right atrium and provides insight into the patient's fluid status and cardiac function, the proximal lumen is specifically used. This lumen is positioned near the right atrium and is directly accessible for the measurement of central venous pressure. The proximal port is designed for fluid administration, sampling, and pressure monitoring, making it suitable for CVP readings.

The distal lumen of the Swan-Ganz catheter, on the other hand, is typically used for measuring pulmonary artery pressures rather than central venous pressure. While the jugular and subclavian veins are locations for catheter insertion and access, they are not where CVP measurements are directly taken from a Swan-Ganz catheter.