Final answer:
Pulmonary vascular resistance index (PAMP - PAWP) x 80/CI is suggests pulmonary hypertension or other cardiopulmonary disorders.
Step-by-step explanation:
The pulmonary vascular resistance index (PVRI) is a measure of the resistance to blood flow in the pulmonary arteries. It is commonly used in the assessment of patients with pulmonary hypertension or other cardiopulmonary disorders. PVRI is calculated using the formula: PVRI = (PAMP - PAWP) x 80/CI, where PAMP represents pulmonary artery mean pressure, PAWP represents pulmonary artery wedge pressure, and CI represents cardiac index. This index helps clinicians evaluate the severity of pulmonary hypertension and monitor the effectiveness of treatment interventions.
To calculate PVRI, first, subtract PAWP from PAMP to obtain the difference in pressure across the pulmonary vascular bed:
PAMP - PAWP = ΔP
Next, multiply this difference in pressure by 80 to obtain the first component of the PVRI formula:
80 x (ΔP) = 80 x (PAMP - PAWP)
Finally, divide the result by the cardiac index to obtain the PVRI value:
80 x (PAMP - PAWP) / CI = PVRI
A higher PVRI value indicates increased resistance to blood flow in the pulmonary arteries, suggesting the presence of pulmonary hypertension or other cardiopulmonary disorders.