VENOUS PRESSURE-THORAX

SUMMARY

1. CVP at RA ~4.6 mmHg & fluctuates with respiration.
2. High CVP reading may be caused by anything that puts strain on the right heart: a rapid fluid bolus, pulmonary embolism, tension penumothorax, cor pulmonale.
3. Inspiration generate negative thoracic pressure & helps venous return.

4. Pressure in the subclavian vein, as it crosses the first rib, is positive above atmostpheric pressure, when lying down.

Reference(s)

Barrett, K.E., Barman, S.M., Boitano, S., Brooks, H.L., Weitz, M., Brian Patrick Kearns, Ganong, W.F. and Mcgraw-Hill Education (Firm (2016). Ganong’s review of medical physiology. 25th ed. New York: Mcgraw Hill Education.
Hall, J.E. and Hall, M.E. (2020). Guyton And Hall Textbook Of Medical Physiology. 14th ed. S.L.: Elsevier - Health Science.
West, J.B. and Luks, A.M. (2021). West’s Pulmonary Pathophysiology. Lippincott Williams & Wilkins.