About CVR Calc
CVRCalc was designed by clinicians, for clinicians - and is the tool for healthcare professionals who work in or perform Vascular Access and Infusion Therapy roles and want to monitor accurate catheter to vessel ratios....
CVRCalc was designed by clinicians, for clinicians - and is the tool for healthcare professionals who work in or perform Vascular Access and Infusion Therapy roles and want to monitor accurate catheter to vessel ratios. It is designed to calculate the area consumed within the intravascular space used by the catheter. The device can be used to calculate the area for both venous and arterial devices if preferred. This simple tool allows clinicians to make quick area-based calculations during the patient assessment process, along with using ultrasound to accurately measure the vessel size prior to the insertion of an intravascular device. It covers both peripheral intravenous devices (in both Gauge and French sizes) as well as central venous access devices (in French size only). Based on the 1st Place poster awarded at the Association for Vascular Access 2017 Scientific Meeting in Phoenix and supported with an academic publication, which can be found here - https://doi.org/10.1007/s11239-017-1569-y This App does NOT collect, record, store, or transmit any information entered, and is used to provide the mathematical catheter to vessel area-based calculations only.
Version History Small improvements to catheter sorting. 2.0.3 09/28/2025 This version of the app adds several new catheter sizes. You can also start a calculation from the Lock Screen or Control Center with a new widget and control. 2.0.2 09/19/2025 In this update, CVR Calc gets a fresh design that makes it easier for you to calculate a diameter or area ratio. Check out the visualizer to help you better understand your results. Need to go hands free? You can now use Siri or the Shortcuts app to calculate a CVR. 2.0 05/27/2024 This version contains some small fine tunings to provide more accurate calculations. 1.0.1 09/15/2018 1.0 09/13/2018
Previous Versions
Here you can find the changelog of CVR Calc since it was posted on our website on 2023-09-06 18:54:59.
The latest version is 2.0.3 and it was updated on 2026-06-24 09:59:18. See below the changes in each version.
CVR Calc version 2.0.3
Updated At: 2026-06-03
Changes: Version History Small improvements to catheter sorting. 2.0.3 09/28/2025 This version of the app adds several new catheter sizes. You can also start a calculation from the Lock Screen or Control Center with a new widget and control. 2.0.2 09/19/2025 In this update, CVR Calc gets a fresh design that makes it easier for you to calculate a diameter or area ratio. Check out the visualizer to help you better understand your results. Need to go hands free? You can now use Siri or the Shortcuts app to calculate a CVR. 2.0 05/27/2024 This version contains some small fine tunings to provide more accurate calculations. 1.0.1 09/15/2018 1.0 09/13/2018
CVR Calc version 2.0.3
Updated At: 2025-09-28
Changes: Small improvements to catheter sorting.
CVR Calc version 2.0.3
Updated At: 2025-09-25
Changes: Sep 25, 2025
Version 2.0.3
Small improvements to catheter sorting.
CVR Calc version 2.0
Updated At: 2024-05-27
Changes: May 27, 2024
Version 2.0
In this update, CVR Calc gets a fresh design that makes it easier for you to calculate a diameter or area ratio. Check out the visualizer to help you better understand your results. Need to go hands free? You can now use Siri or the Shortcuts app to calculate a CVR.
CVR Calc version 1.0.1
Updated At: 2018-09-15
Changes: Sep 15, 2018
Version 1.0.1
This version contains some small fine tunings to provide more accurate calculations.
Disclaimer
Official App Store Link
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