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Segment Information
 3 Months Ended
Mar. 31, 2025
Segment Reporting [Abstract]  
Segment Information Segment Information
We have two reportable segments organized according to our products and services: Medical Devices and Preservation Services. The Medical Devices segment includes external revenues from product sales of aortic stent grafts, On-X®, surgical sealants, and other product revenues. Aortic stent grafts include aortic arch stent grafts, abdominal stent grafts, and synthetic vascular grafts. Aortic arch stent grafts include our E-vita® Open NEO, E-vita Open Plus, AMDSTM, the NEXUS ONETM, NEXUS DUOTM, and NEXUS TRETM aortic arch stent graft systems (the “NEXUS family of products”), and E-vita Thoracic 3G. Abdominal stent grafts include our E-xtra Design Engineering, E-nsideTM, ArtivexTM, E-tegraTM, E-ventusTM BX, TuvaTM BX, and E-liacTM products. Surgical sealants include BioGlue® Surgical Adhesive products. The Preservation Services segment includes external services revenues from the preservation of cardiac and vascular tissues. There are no intersegment revenues.
Our Chief Operating Decision Maker (“CODM”) is the Company’s Chairman, President, and CEO. The CODM reviews financial information to assess segment performance and determine how to allocate resources across segments.
The primary measure of segment performance, as assessed by our management, is segment gross margin or net external revenues less cost of products and preservation services. The CODM regularly reviews these costs, recognizing them as significant segment expenses. We do not segregate assets by segment; therefore, asset information is excluded from the segment disclosures below.
The following table summarizes revenues, cost of products and preservation services, and gross margins for our reportable segments (in thousands):
Three Months Ended
March 31,
20252024
Revenues:
Medical devices$78,798 $71,114 
Preservation services20,180 26,317 
Total revenues98,978 97,431 
Cost of products and preservation services:
Medical devices25,263 23,750 
Preservation services10,138 10,735 
Total cost of products and preservation services35,401 34,485 
Gross margin:
Medical devices53,535 47,364 
Preservation services10,042 15,582 
Total gross margin$63,577 $62,946 
Net revenues by product were as follows (in thousands):
Three Months Ended
March 31,
20252024
Products:
Aortic stent grafts$36,602$32,103
On-X21,57419,681
Surgical sealants18,10616,981
Other2,5162,349
Total products78,79871,114
Preservation services 20,18026,317
Total revenues$98,978$97,431