OPTN: Organ Procurement and Transplantation Network

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LAS Calculator

This calculator uses the same formula as the UNet^SM computer system. UNet^SM is the computer system used by the transplant center to calculate lung allocation scores for patients in need of a lung transplant.

This calculator produces a score based on the data entered below. If you do not have a certain variable, you may leave the field blank. Be advised that a policy default value may be used to calculate the score for an incomplete field.

To learn more about how lung allocation scores are determined, refer to the documentation listed under the "Questions?" sections, displayed on the right. If you are a transplant candidate, and have questions regarding the score generated by this calculator, please contact your transplant coordinator.

Attention: The lung allocation score may change on a daily basis due to age. The actual lung allocation score provided to a candidate is calculated by UNet^SM based solely on the data that is entered by the transplant center. The score produced by the LAS Calculator on this website is for your informational use only.

DOB:^*
Height:^*	ft in	cm
Weight:^*	lbs	kg
Lung Diagnosis Code:^*
Functional Status:
Diabetes:
Assisted Ventilation:
Requires supplemental O₂:
Amount:	L/min %
Percent Predicted FVC:	%	Current PCO₂ is the value with a test date closest to todays date. This calculator uses the arterial blood gas test for the current PCO₂ value. If using the central venous test value, subtract six (6) mm Hg from the central venous value and enter that number. Enter a capillary test value as is. This calculator uses the arterial blood gas test for the Highest PCO₂ value. If using the central venous test value, subtract six (6) mm Hg from the central venous value and enter that number. A capillary test value is considered the same as an arterial test value. This calculator uses the arterial blood gas test for the Lowest PCO₂ value. If using the venous test value, subtract six (6) mm Hg from the venous value and enter that number. A capillary test value is considered the same as an arterial test value. The Lowest PCO₂ value entered must have a test date that occurs before the test date of the Highest PCO₂ value. The test date of this value cannot be more than 6 months from the test date of the highest value. The candidate receives an impact in the lung allocation score from Change in PCO₂ if the difference between the highest and lowest values of PCO₂ is at least 15%.
Pulmonary Artery Systolic Pressure:	mm Hg
Mean Pulmonary Artery Pressure:	mm Hg
Pulmonary Capillary Wedge Mean:	mm Hg
Current PCO₂:	mm Hg
Highest PCO₂:	mm Hg
Lowest PCO₂:	mm Hg
Change in PCO₂:	%
Six minute walk distance:	feet
Serum Creatinine:	mg/dl

LAS Score

Learn more about the LAS System

Learn about the LAS Calculator

Additional lung allocation system resources are available on the United Network for Organ Sharing (UNOS) Web site. Go