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Portable peritonitis testing device - results 10,000X quicker that current methods

Changing lives through design and engineering is something that Coventry-based Smallfry excels at and QuickCheck™, is a perfect example of how collaboration and design innovation can really transform ideas. Turning new technology and science into products that drive impact and improve lives.


This latest medical device collaboration has the potential to revolutionise both the speed and diagnosis of peritonitis in vulnerable kidney and liver failure patients. With results 10,000X faster than current methods, this easy-to-use, portable device will hopefully make significant strides forward for patients who rely on peritoneal dialysis (PD). 


When you consider one in 20 peritonitis episodes result in the death of the PD patient, prevention and prompt and appropriate management of the condition is essential for the long-term success of peritoneal dialysis.

QuickCheck™ was born out of collaboration between Smallfry Innovation and the team at MicroBioSensor. To rapidly identify Leukocyte levels in peritoneal effluent. The device provides a clear, non-subjective answer as to whether ISPD threshold levels of leukocytes have been exceeded, thus providing crucial and timely information to help clinical teams decide whether patients need to be admitted to hospital.


Not only is QuickCheck™ portable, but it also maintains accuracy levels equal to hospital laboratory testing, whilst delivering results in a matter of seconds. It is easy to use, affordable, and helps improve patient outcomes. With current testing methods taking up to 48 hours, this new device can act as an early warning system for microbial infection to ensure patients receive early treatment.



“The diagnostic results usually arrive 48h too late to have a meaningful impact on patient treatment…”                                                                                  

Anand Vardhan, Consultant Nephrologist, MRI.



Designed to be lightweight, portable, and accurate, QuickCheck™ allows nurses to carry out an instant leukocyte count at the patient’s home. Providing convenience to the patient and supporting rapid detection and treatment pathways. In a nutshell, it provides a genuine opportunity to relieve pressure on an overwhelmed healthcare system, reduce costs and dramatically improve patient outcomes.


With significant expertise in medical device development and design, Smallfry ensured that patient and user experiences were paramount throughout the design process. They invested quality time to understand the challenges of dialysis, infection risk and the typical testing process for Peritonitis. 


With comprehensive human-centred research and design, access to medical-grade in-house 3D printing, and engineering knowledge, Smallfry was able to work through a number of concept iterations. To refine the device, making sure it was simple and clear to use.  Free from dirt traps, engineered to cope with being portable and easy to keep clean.


With automated results and a digital readout, the device provides an early warning system for infection or, conversely, provides reassurance when there is no significant infection risk.  The resulting outcomes include improved patient care, resource savings, and help in the battle against rising antimicrobial resistance.



You can read more about the device, how it works and what it really means for patients at or check out the links below

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Smallfry are a strategy-led design and innovation company that develops products, services, and innovations that DEMAND to be bought. Our services include strategy and brand development, vision setting and coaching workshops, consumer insights research, ideation and concept development, to fully detailed medical device development. Our results make a difference and move the needle in your business.

Contact: Kelly Myall-Chance

The Old School Building

Wolston, Warwickshire



+44 (0) 247 654 5678 



MicroBioSensor Ltd:


MicroBioSensor miniaturises and simplifies conventional laboratory-grade microbiology and cytology, packaging it into inexpensive, point-of-care in vitro diagnostic devices (IVDs). Our devices function as early warning systems for microbial infection and are designed to be compatible with and complementary to existing (lab-based) infection control processes and techniques.


The Incubator Building,

48 Grafton Street,

Manchester M13 9XX

 +44 (0)161 606 7401