# RBCX Calculation Tool

> Medical tool for estimating red blood cell exchange fluid volume on Spectra Optia. (iPhone/iPad app by Terumo BCT.)

- Source: https://appshunter.io/ios/app/rbcx-calculation-tool/id1457982121 (this page in markdown: same URL + `.md`)
- Developer: [Terumo BCT](https://appshunter.io/developer/1023483386)
- Category: Medical
- Price: Free
- Rating: 4.80/5 from 5 App Store ratings
- Age rating: 4+
- Requires: iOS 15.6 · 26 MB
- Languages: American English
- Released: 2019-05-24
- Data updated: 2026-06-01
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/rbcx-calculation-tool/id1457982121/reviews.md

## What is RBCX Calculation Tool?

The Spectra Optia® Apheresis System RBCX Calculation Tool is intended to help medical professionals who are responsible for prescribing and performing red blood cell exchange (RBCX) procedures to estimate the volume of replacement fluid required to perform a procedure on the Spectra Optia system. Using the same patient data and the same fluid data that is entered on the Spectra Optia system, the RBCX Calculation Tool calculates and displays the estimated volume of replacement fluid required to achieve the target Hct and FCR. It can also determine whether a custom prime is recommended. While the tool is intended to help prepare for a procedure, it is not intended to be used for making medical decisions.

Use of the Spectra Optia® Apheresis System RBCX Calculation Tool on iOS requires iOS version 14.0 or above.

For more information about the tool, see the About page.

## Key features

- Estimate replacement fluid volume
- Calculate target Hct and FCR
- Determine custom prime recommendation
- Uses patient and fluid data
- Supports Spectra Optia system


## Frequently asked questions about RBCX Calculation Tool

### What is the RBCX Calculation Tool used for?

The RBCX Calculation Tool helps medical professionals estimate the volume of replacement fluid needed for red blood cell exchange (RBCX) procedures on the Spectra Optia system. It calculates this based on patient and fluid data to achieve specific Hct and FCR targets.

### Is the RBCX Calculation Tool intended for making medical decisions?

No, while the tool is designed to aid in preparing for a procedure, it is explicitly stated that it is not intended for making medical decisions. It serves as an estimation aid.

### What are the system requirements for the RBCX Calculation Tool?

The RBCX Calculation Tool requires iOS version 14.0 or above to run. It is compatible with iPhone, iPad, and iPod devices.

### How accurate is the RBCX Calculation Tool?

The tool uses the same patient and fluid data entered on the Spectra Optia system to provide its estimations. It aims to accurately display the estimated volume of replacement fluid required.

### Does the RBCX Calculation Tool have ads?

No, the RBCX Calculation Tool is ad-free. It does not contain any advertisements.

### How often is the RBCX Calculation Tool updated?

The latest version of the RBCX Calculation Tool is 2.2.8, which was last updated on October 29, 2025. This indicates a relatively recent update for the application.

### What is the age rating for the RBCX Calculation Tool?

The RBCX Calculation Tool has an age rating of 4+. This means it is considered suitable for all ages and does not contain content that would be inappropriate for children.

### Where can I find more information about the RBCX Calculation Tool?

For more detailed information about the RBCX Calculation Tool, you can refer to the 'About' page within the application itself. This section typically provides further insights into its features and usage.

## Version history (last 4 releases)

### 2.2.8 — 2025-10-29

Upgraded to support the latest iOS version.

### 2.2.6 — 2024-08-07

Rebranding as Terumo Blood and Cell Technologies.

### 2.1.1 — 2020-06-29

Updated to conform with iOS 13

### 2.0 — 2019-05-23

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*