I'm looking for some inspiration around methods for measuring usability of a bedside testing device in critical care. Any tools and ideas would be great.
Hi, depending on your experience in usability and what you need to test, who need to define who are the final users and important stakeholders. What device are we talking about? you don't need to be specific in case its confidencial... but testing a robot for medical care, is different than testing an application for doctors or health teams related to a patient data related to his/her health.
I can not give general advice besides the methodologies you can find for instance here:
https://www.nngroup.com/
We are looking at a bedside point of care device, so nurses, scientists, medical team, point of care department, physios etc. are all key stakeholders
I would suggest that you investigate modern transcutaneous O2/CO2 technology that can nowadays measure and monitor tissue oxygenation levels and tissue carbon dioxide levels. I have used this to confirm that combinations of opioids and hypercarbia enhance tissue oxygenation during surgery. It should be a valuable tool for monitoring tissue oxygenation in critically ill patients. The same machines can also use Doppler technology to assess microvascular perfusion.
Telehealth usability questionnaire might be work for you. You could probably adapt some of the questions as needed.
Is it an application or a software? I have been involved in medical app development and I have a master in anthropology - and have presented on app development in a regulated world a couple of years ago. If an app my presentation may be interesting for you - I can share if interested :)
Dear Ninette,
The PeriMed TcO2/TcCO2 machine is an application. It measures the tissue partial pressures of oxygen and carbon dioxide via a small sensor that is placed on the skin. I have successfully connected the digital output of the machine so that its measurements are ported into our Plexus "AIMS" software. I've attached a copy of a typical anesthetic record produced by the AIMS software. In my estimation, this monitor should be a standard monitor during surgery, because it offsets the shortcomings of conventional pulse oximetry, which measures only the saturation of oxygen in the hemoglobin molecule. For example, iatrogenic mechanical hyperventilation depletes carbon dioxide, which exaggerates hemoglobin binding to oxygen in the lung, but inhibits the release of oxygen from the hemoglobin molecule in tissues, and therefore causes cellular oxygen starvation that is deceptively "masked" by the 100% saturation reading of the pulse oximeter. you can see from the attached anesthetic record that the tissue partial pressure of oxygen gradually rises to around 300 torr as progressive oxygen delivery exceeds cellular oxygen consumption with my technique, which delberately employs combinations of opioids and hypercarbia to optimize cellular oxygenation and organ protection. Perimed offers proprietary software that also captures this data, but I found it primitive and largely useless, because it cannot offer comparison with other types of monitoring data. I think that the PeriMed machines could be useful in a wide variety of critical care situations to optimize medical management.
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